Cemented Carbide Coated Tool Coated Substrate Gradient

The bonding strength of the coating and cemented carbide coated tools alloy matrix is key carbide tool life, the coating must be suitable substrates therewith can combine to achieve the desired performance. Not the same material as each of the thermal expansion coefficients are different, probably because of the thermal stress cracks in the coating during cooling. Due to the brittle cemented carbide coated tool coating material, usually easier to crack the coating to the substrate surface extension. Gradient of substrate processing, the surface area of the coated substrate forming ductile region cubic carbides and carbonitrides, the binder content in this region is higher than the nominal binder content of the coating substrate; when the coating formed when the crack growth to the region, because of their toughness, crack propagation can absorb the energy, it is possible to effectively prevent the crack to the inside of the alloy expansion, improve the performance of cemented carbide cutting tools.

Tungsten Carbide Coated Tool Flexibility of The Coating Process

Single tungsten coated carbide coated tools can not meet the increasingly complex machining requirements, therefore, it appears coating technology portfolio diversification. "Nitriding / PVD" composite coating technology is one of them. As early as 1983 it was suggested that the plasma nitriding and ion plating process together. To improve the performance of the hard protective coating substrates by thermal chemical pretreatment technology more and more attention. The matrix nitriding and ion plating TiN composite processing, it can form a reasonable hardness gradient distribution, and also because of the role of TiN and N and further spread to internal nitrided layer deposition process, so that the transition layer hardness than a single nitrided layer is higher around 100HV0.1, so that the composite coatings have been strengthened.

Cemented Carbide Coating Tool Coating Composition Diversification

With the continuous development of technology, cell coated cemented carbide coated tools can not meet the needs of the market, does not match the substrate and the hardness, elastic modulus and thermal expansion coefficient of the coating material coated tools unit, the lattice type are not the same, resulting in residual stress between the substrate and coating, adhesion is not strong. Adding new elements in a single coating (such as adding Al, Cr and Y increase antioxidant activity, adding Zr, V, B and Hf improve wear resistance, hardness and resistance to adding Si improve chemical diffusion) prepare a diverse tool coating layer material, greatly improving the overall performance of carbide-coated tools. In the multi-carbide coated tool, the most commonly used is the TiCN, (Ti, Al) N coatings.

Preparation Cemented Carbide Coated Tool

Preparation cemented carbide coated tool varied, its methods are vapor deposition, thermal spraying, chemical treatment, thermal reaction diffusion deposition, sol-gel. Is a method commonly used in the preparation of vapor deposition, because the preparation of the coating quality is good, has gradually become the dominant tool coating preparation methods, vapor deposition, chemical vapor deposition technology is divided into (chemicalvapordeposition, CVD) and physical vapor deposition (physicalvapordeposition, PVD). Chemical vapor deposition (CVD) deposition category belonging atom, a pioneer in the use of gaseous reactants through the atom generated solid coating, intermolecular chemical reaction pathway techniques.

Cemented Carbide Coated Tool Heat Treatment

Heat quantity cemented carbide coated tool because it is in an arc ion plating process, the substrate temperature between 200 ~ 400 ℃, due to the lower temperature, the coating material is deposited on the substrate surface is quenched, the coating material due to the thermal expansion coefficient differences have different heat shrinkage tendency, between the coating of each grain thus generating a thermal stress. The existence of thermal stress accelerates cemented carbide coated tool failure in mechanical cutting process. The heat can absorb part of the strain energy, easing the stress relaxation, coordination of the corresponding state change. Heat-treated steel base CVD-TiN coating, the coating after 1030 ℃ 250 ℃ after quenching and tempering, TiN coating microhardness increase, the crystal structure of the coating tends to be more complete, its lattice spacing and more TiN crystal plane close to the standard value of the pitch, while the density of the coating increased, and a good combination of strength of the matrix.

Cemented Carbide Coated Tool Cold Treatment

Cemented carbide coated tool, the composition and nature of the binder phase matrix Co tool for strength and deformation characteristics of cemented carbide coated tool plays a vital role. If you want to change the characteristics of this ingredient and alloys, has two ways, one is the heat treatment, another is the tool cold treatment. Cold treatment cemented carbide coated tool creates a ultra-low temperature environment, the degree of supercooling is increased, so that the cobalt alloy free energy difference of the phase change increases, increasing the driving force of phase transition, thereby reducing the tool in the cutting process abrasive wear and diffusion wear. Because of the higher surface hardness and wear resistance coating material, cemented coated carbide allows a higher cutting speed, thereby improving the processing efficiency; or can greatly improve tool life at the same cutting speed.

Introduction of Cemented Carbide Coated Tool

Cemented carbide coating on the carbide cutting tool is coated substrate layer or layers of high hardness, good wear resistance of metal or non-metallic compound thin film coated tools, combined with a matrix of high strength, high toughness and Tu storey hardness, high wear resistance advantages, reduces the friction coefficient between the tool and the workpiece, to improve the wear resistance without lowering the toughness of the tool substrate. Thus, coated cemented carbide having high hardness and excellent wear resistance, extended tool life. Processing technology on tool performance coated tool after a certain influence, after cemented carbide coated tool processing techniques include heat treatment, magnetic treatment, cryogenic treatment, as technology advances, more updated type of post-processing techniques will bring Tu layer another tool change.

ZrN Coating Tungsten Carbide Coated Tools Introduction

Tungsten carbide coated tools in addition to ZrN coatings resistant to corrosion, high temperature, wear resistance, but also has good mechanical properties and electrical conductivity, beautiful golden appearance and so on. ZrN coating has been widely used in electronic circuit electrical contact layers, the jewelry industry and mechanical friction decorative layer of anti-friction layer, but not a common tool coating applications. With advances in machinery manufacturing technology continues to high-precision, high-speed direction, so the cutting tool in strength, high temperature, wear resistance and service life and other aspects of the performance requirements is also rising. The tool coating treatment is one of the important means to improve the performance of the tool. Because coating can improve the processing efficiency and accuracy, longer tool life, reduce processing costs, and therefore, the coating of metal cutting tools used in more and more widely.

Relationship Tungsten Carbide Coated Tool Coating Hardness and Thickness of The Tool Wear

Tungsten carbide coated tool hardness and thickness of the coating of the tool wear plays a great influence, the higher the hardness, wear resistance is also relatively higher. However, the high hardness, crack sensitivity of the coating is also increased. The coating is too thin, can not protect the base material, the wear resistance relatively badly; thick coating, the residual stress due to the difference in thermal expansion coefficient between the coating and the substrate material is produced on a large, excessive residual stress will cause cracks produced, thereby reducing the strength of the material. Therefore, the coating thickness should be appropriate. Coating interfacial bonding force matching coat and showed good tool materials, combined with strength, long service life of the tool. Tool material and the coating material matching the better, the closer the coefficient of thermal expansion, the tool will have a high thermal conductivity and heat resistance.

Mechanical Properties of ZrN Coated Tungsten Carbide Coated Tool

ZrN, ZrN / Zr and ZrN / TiN / Zr coated tungsten carbide coated tool microhardness than the matrix YT15 tungsten carbide inserts (16.5GPa) is even higher, up to no transition layer coating hardness, 28.0 GPa, composite coating hardness is slightly lower. Under the same conditions of base material, zirconium transition layer of ZrN coating thickness maximum, minimum buffer layer of zirconium ZrN / TiN composite coating thickness. This is because during the deposition process, the titanium ions and zirconium ions collide with each other, resulting in the deposition speed is reduced, so that, in the same deposition time, the minimum coating thickness. No transition layer coating interfacial bonding force lower than that of the buffer layer coating, ZrN / TiN / Zr highest adhesion of the coating, no transition layer of ZrN coating adhesion to a minimum. This is due to take place between the transition layer of zirconium and composite coatings TiN and ZrN coatings YT15 matrix and ion diffusion, reducing the residual thermal stress between the coating and the substrate, thereby increasing the binding force of the coating.

How to Prevent Tungsten Carbide Broach Without Failure When Broaching?

Tungsten carbide broach not prevent failure when broaching, you can take the following measures:

1, requires pre-hole precision IT8 ~ IT10, the surface roughness of the Ra≤5μm, prefabricated holes and positioning the end face of the vertical deviation of not more than 0.05mm.

2, strict inspection Carbide broach manufacturing precision. For outsourcing can broach teeth liter volume chip space and broaches strength check.

3, broaching performance and difficult to machine materials, you can select the appropriate heat treatment to improve the workability of the material, often using carbide high-performance materials or coatings broach broach.

4, storage, transportation Carbide when broaches, broach prevent bending and damage the teeth.

Tungsten Carbide Broach Broaching Faults and Solutions

There may tungsten carbide broach the production process will be a variety of failures, thus affecting Carbide broaches broaches broaching the quality and longevity, and even damage the tool. Carbide broach damage was due mainly to the teeth when broaching the pressure too much, not enough strength to pull a knife. Carbide Broach caused by excessive force teeth for many reasons, such as: pulling teeth liter excessive bending Carbide broaches, broaching the cutting edge of each point margin uneven, cutter radial runout large, prefabricated hole too rough, hard spots inside the material, workpiece strength too seriously sticky crumbs and chip flutes such as congestion and the workpiece clamping skew.

How to Use Tungsten Carbide Reamers

Tungsten carbide reamer to use, according to the assembly precision, feed part of the cutting edge notch checks oiling method, the guide sleeve and the workpiece clamping five aspects are introduced. First talk about the assembly precision in the use of carbide reamer to note that at the time it is loaded onto the machine, shake carbide reamer feed the front part to control the 0.02mm or less. In cutting, in order to always maintain this accuracy, you can use the guide sleeve. Then to feed part of the cutting edge gap check: Even reamer jitter can be limited within a desired range, but in fact often due to chipping of the cutting edge itself, gap, or lack of good surface roughness and precision of the hole. Therefore, before using, not only to check tungsten carbide reamer jitter, but also to check whether the chipping of the cutting edge itself, and the gap.

Tungsten Carbide Broach Eliminate Surface Defects When Broaching Method

1. To improve the quality tungsten carbide broach sharpening teeth and prevent edge chipping produce and maintain sharp edge, each tooth rake and the same width.

2. To maintain the stability of broaching process, while working to increase the number of teeth, reduce fine incisor teeth and tooth pitch calibration, broaching process systems to improve rigidity.

3. The rational use of broaching speed, resulting in the production of reptiles often encountered in practice due to the low speed broaching broaching, broaching speed is too high there will be vibration. In addition, the impact speed broaching broaching surface quality, wear and pull broaching rate important factor knife.

4. The use of tungsten carbide broaches, broach coating, laser hardening high-speed steel broaches, etc., which have a good surface quality broaching role in improving the speed of broaching, broach reduce wear and increase life expectancy and improve broach.

5. The rational use of cutting fluids and the full cast. For example, when broaching carbon and alloy steel, if the choice of extreme pressure emulsion, curing and processing oil extreme pressure additives to improve broach cutting oil life, significantly reducing the surface roughness effects.

Tungsten Carbide Broach Broaching of Surface Defects

Tungsten carbide broach in broaching process, factors broaching surface defects are mainly crowded highlights, scales thorns, scratches, burnishing, circular ripples and bite knives. Factors that cause surface defects when tungsten carbide broach broaching have slight edge passivation or chipping, edge sticky crumbs, cutter blade with too much or uneven width, rake angle is too large or too small, broaching produced during vibration. If the surface roughness qualified, but when you scratch defects generated, you can check if there are bumps cutter blade gap; if there has not been cleaned chips attached to the cutter; Broach tolerance after repeated sharpening shavings whether or not caused by the shape of the groove smooth stepped to cause the chip curling is not smooth and squeeze bad. Teeth and scratch the machined surface and the like. In addition, if the pre-processing of oxide on the surface of the hole may also cause localized bumps and scratches tooth defects.

After Sintering of Tungsten Carbide Inserts Molding Method

Tungsten carbide insert after molding to sintering, the sintering method is:

1, which has been finely divided tungsten carbide powder and cobalt powder according to the desired shape of the pressure, the metal particles are connected to each other, because only the first step, so the combination is not very strong.

2, the powder particles of the already formed block with increasing temperature, gradually strengthening the degree of the connection, in conjunction 700-800 ℃ when the particles still fragile, more voids between the particles, the voids called pores.

3, the heating temperature is increased to 900 ~ 1000 ℃, the voids between the particles decrease, linearly black part almost disappeared, leaving only the black portion chunks.

4, the temperature was slowly approaching 1100 ~ 1300 ℃ (i.e., normal sintering temperature), to further reduce the gap, binding between the particles become more robust.

5, when the sintering process is completed, the tungsten carbide inserts in the form of small particles of polygonal, in which can be seen around the white substance, that is cobalt. Blade organization based sintered cobalt finished basement, covered with tungsten carbide particles. Particle size, shape and the cobalt layer thickness is different, the nature of the cemented carbide inserts are also different.

Tungsten Carbide Blade Manufacturing Process

Tungsten carbide blade manufacturing powder metallurgy method is generally used, will reach 2870 ℃ melting tungsten carbide powder is heated to more than one thousand degrees Celsius to make sintering. In order to make a more solid tungsten carbide powder combination, to use cobalt powder as a binding agent. Under high temperature, high pressure, and affinity tungsten carbide powder and cobalt powder each other will increase, thereby forming, a phenomenon called sintering. Carbide blade production processes: particle size of several micrometers fine material - with a ball mill powder mixing W powders and C - W mixed powder and C powder powder made of the WC powder carbonization - WC powder has been carbonized - adding a lubricant in the WC powder and Co powder - carbide inserts molded.

Damage Rule Tungsten Carbide Inserts

Tungsten carbide inserts damage can be divided into crater, thermal cracking, chipping, chipping, or gap, wear three cases. Produced crater, thermal cutting is because the temperature is too high; produce chipping, chipping or notch toughness of tungsten carbide body because of inadequate or unstable lead the rotary machine with the gap exists between the various parts; wear generation is small because the cutting edge of the scraper loss nibs caused by the contact of the tool and the workpiece caused. For the crater and thermal cracking solution is to use high-temperature performance is good and contains a lot of titanium carbide or tantalum carbide materials; for chipping, chipping or gap solution is to strengthen the material holding force particles with cobalt content and more material; for the cutting edge loss solution is to increase the content of tungsten.

Tungsten Carbide Milling Problems and Solutions

When tungsten carbide milling cutter, the inevitable always a wide variety of problems. These problems generally include tool breakage, wear, short tool life (edge passivation), blade gap, chip stacking, edges, no vertical edge, size is not enough precision, noisy and rough surface fine milling and other phenomena. Carbide tool breakage occurs reasons generally feed too fast, chip volume is too high, the total length of the blade length is too long or too long, such as excessive wear, the solution is to reduce the feed rate, lower feed per tooth to the rate fixed shank deep; use shorter end mill, early grinding. Reason for the occurrence of a short life of tungsten carbide cutting tools (knife edge passivation) is generally too high friction when cutting the workpiece and tough or incorrect cutting angle, its grinding solutions for the early use of advanced tool steel (metal polymer molecules ) or switch to the correct cutting angle and clearance angle.

Damage Tungsten Carbide Tools and Solutions

Tungsten carbide tool abrasion damage usually wear, crater, chipping, thermal cracking, gap, abnormal debris, BUE peel, peel into a piece of plastic deformation and a total of nine kinds of situations. Tungsten carbide cutting tool wear abrasion occurs, when the strip behind severe wear occurs, you should use the tool fine particulate material, and to enhance its hardness and strength at high temperature quenching. Rigid; material containing a trace amount may be used tantalum carbide; crater occurs when tungsten carbide tools, the current severe concave surface wear occurs, it should be noted diffusion and strength at high temperature, can be used titanium carbide, tantalum carbide content of high material alloy tool chipping occurred, when the tiny slivers falling behind, then carefully polished tip of the cutting edges should be ground, can reduce debris.

Quality Tungsten Carbide Tool Sharpening

After sharpening tungsten carbide tools, surface prone to burns and cracks, which seriously affected the performance of tungsten carbide cutting tools and tool life. But the choice of how much size, how much line speed wheel, use what's grinding parameters, in order to make the sharpening of knives get smaller surface roughness, in order to effectively avoid the tool surface cracks and burns, ensure better quality sharpening issues such as interpretation. Carbide tool sharpening depends on the combined effect of the level of quality parameters wheel, grinding parameters, tool material and grinding methods and other factors; improved cutting tool surface roughness smaller.

Tungsten Carbide Cutting Tool Wear Mechanism

In the initial stage of tungsten carbide tool wear, plastic deformation of Co binder phase in the surface layer is extruded Co WC grains. Due to the small Co hardness, good ductility, under certain conditions, may be in surface friction micron film formation, while a hard WC particles are slowly protruding from the friction surface, to avoid the rapid wear of the surface and further, the procedure proceeds to friction relatively stable phase. With the loss of binder phase of Co, WC skeleton material destruction, a significant increase in the dislocation density WC particles, when the dislocation density is accumulated to a certain amount, it will form a micro-cracks in the WC particles, and thus make WC carbide particles begin to pull out from the matrix. Shedding of WC particles remain in the wear area into abrasive, under load extrusion occurs and the substrate, resulting in plastic deformation and breakage of new grains.

Friction and Wear Properties of Tungsten Carbide Cutting Tools

In each tungsten carbide cutting tool friction processes follow a similar law, namely the initial dynamic friction coefficient have experienced a rapid increase in the transition period from the initial value, and then remained relatively stable and fluctuated in a stable phase characteristics. Initially, under normal loading, the friction surface is only partially asperity contact, a smaller adhesive area, the contact surface of the molecular attraction is small, the friction coefficient is small; as rubbing process, interfere asperity gradually being polished, adhesion area increases, the molecular attraction also increases, resulting in friction coefficient increases. The whole process is the carbide friction contact surface mount constantly, then they continue to cut under shear stress process. Since the surface of Co phase peeling, crushing the sample surface caused by wear, local surface adhesion soon reach a dynamic equilibrium, causing the friction coefficient of the surface is maintained in a more stable range, called the stationary phase.

Tungsten Carbide Cutting Tool Selection

The amount of tungsten carbide cutting tools is reasonable or not choose between a good impact on the ability to play with the machine tool cutting potential in order to achieve high-quality, high yield, low cost and safe operation. Fine car, machining accuracy and surface roughness is higher, and the allowance is not uniform, so choose when cutting the amount of fine cars, should consider how to ensure that the processing quality and maximize productivity on this basis. Therefore, refined car should use a smaller (but not too small) on the back of cut and feed rate, and the use of high performance materials and reasonable tool geometry parameters, in order to improve the cutting speed as possible.

Tungsten Carbide Turning Angle Measurement Geometry

Type tungsten carbide turning into the straight cylindrical head turning, turning outer elbow, partial knives, cutting knives. Carbide Tool geometry measurements need be prepared in advance and require universal tools protractor to measure the turning station. Structure and method of use universal tools protractor station: turning protractor sets can more easily measure the turning angle geometry. It mainly consists of base, column, measuring units, positioning block, the size of the dial, the size of the piece of finger, nuts and other components. Wherein the base and column are the supporting body of the entire structure. Measuring tool on the table, try to be positioning block, may vary when the measuring table or counter-clockwise along together, and can be moved around in the measurement stage positioning block. Large nut rotation can move up and down the slippery body, so that the two pieces of the dial and the means to achieve the desired height. When used, by rotating the front or the bottom or side of the measuring station or thumb piece is measured elements fit closely with the tool, you can read the angle values are measured from the base or dial.

Tungsten Carbide Tools Chipbreakers

In carbide turning the breaker groove can affect the volume of chips become shaped portion, the triangular areas cut surface and the contact surface constituting the cutting edge, the main problem is the presence of energy in this region is sufficient to enable the chips to become a roll. Feed change from portrait to landscape when you feed, will change the flow of chips that had been flowing along the direction perpendicular to the cutting edge of the chip will be converted to tilt in the direction of flow of the blade. Then reduce the amount of rake angle is very small, but because only be provided by a shoulder tungsten carbide tools chipbreakers deformation energy of the chips greatly reduced, so the chip out of elongation, causing it wound to the tool or workpiece on. In this case the need to supplement the energy of the deformable portion, the shoulder can be efficiently used cemented carbide tools, the chipbreaker to get deformed.

Nano Tungsten Carbide Cutting Tool Al / SiCp Composite Material Mechanism

Tungsten carbide cutting tool AlSiCp nano composite material is divided into mechanism of tool wear mechanism analysis, a composite material removal mechanism and cutting parameters influence on tool wear three parts. Because of Al / SiCp SiC particulate material hardness (microhardness HV = 27GPa) higher than tungsten carbide (YG class tool material microhardness HV = 16 ~ 18GPa, nano-carbide WC-7Co microhardness HV = 22GPa), therefore, with tungsten carbide cutting tool Al / SiCp composites quickly when worn or damaged. Before and after the cutting tool flank and observed daily post-processing, there is found to the rake face bright visible white band can be seen under the microscope parallel to the flow direction of the chip grooves, since the chip contains a lot of SiC particles, in before flowing along the flank when the chips, the chip on the bottom of the SiC particles generated rake micro-cutting role in the formation of the grooves.

Nano Tungsten Carbide Cutting Tool Al / SiCp Composites

Tungsten carbide is a novel nano-materials, the grain size is about 200nm, like ordinary tungsten carbide does not have high brittleness, easy to chipping, impact intolerance disadvantage, has a high fracture toughness and a very high bending strength also has high hardness and good wear resistance, high thermal conductivity and low coefficient of friction, suitable for the production of tools, and has broad application prospects. However, application of nano tungsten carbide cutting tool Al / SiCp composites, has not been reported. Therefore, to explore the feasibility of application of nano tungsten carbide cutting tooling Al / SiCp has a very important practical significance.

Nano Tungsten Carbide Cutting Tool Manufacturing

Experiment with SPS (discharge plasma sintering method) successfully prepared nano tungsten carbide wc-7Co, using the intercept method WC grain size were tested, the results showed that the average particle size of nano-products of tungsten carbide WC-7Co at about 200 nm. When using nano-carbide WC-7Co making nano tungsten carbide cutting tools, tungsten carbide nano first round sintered WC-7Co rough cut with a knife Cutting block, then Japan and around the flank of the blade were used W40 , W10, W3.5, W1 diamond grinding coarse grinding, fine grinding, ultra-fine grinding and non-feed grinding on ELID (Electrolytic In-process Dressing, ELID) ultra-precision surface grinder, finally succeeded to obtain nano tungsten carbide WC-7Co knife block.

YT15 Coated Tungsten Carbide Tools Cutting Performance

Changes made of different materials YT15 coated tungsten carbide tool main cutting force with the cutting speed is small. When the same cutting speed remains the same, the main cutting force ZrN / Zr-coated tools smallest increase with increased cutting speed first and then downward trend in the rate reaches a maximum 96N to 178m / near min. Main cutting force ZrN coated tools is slightly lower than uncoated tools; ZrN / TiN / Zr coated tool main cutting force is slightly higher than in the low stage uncoated tool, when the speed is increased to 253m / min after the main cutting force is less than the uncoated tool. Add different radial cutting forces coated tools with cutting speed of the rise.

Relations WC Grain Size and Tungsten Carbide Cutting Tools and Wear Properties

WC grain size has important significance for the friction and wear properties of tungsten carbide cutting tools. Most people think that fine grain carbide tools are better than coarse grain tungsten carbide wear resistance. After the tungsten carbide grain refinement, reduction in size of the hard phase, increasing the binding force of the hard phase grains and grain surface area between the binder phase is more evenly distributed around it can be improved tungsten carbide the tool's hardness and wear resistance. When tungsten carbide grain size of less than 1m, there will be double high features, namely hardness and strength will get a larger increase, but this feature along with refined grains become more prominent. And titanium in high-speed friction and wear tests, the ultra-fine grain carbide WC-10Co (grain size 03-05m) the wear rate of less than submicron grain WC-10Co (grain size 06-08m) .

Cylindrical Tungsten Carbide Cutter Features

Cylindrical tungsten carbide cutter commonly used in the machining plane, divided by the number of teeth can be divided into two kinds of coarse teeth and fine, according to the tooth is divided into two kinds of spur and helical teeth. Having a diameter equal to 50mm, 63mm, 80mm, 100mm. Cylindrical tungsten carbide cutter geometry for γn = 15 °, αo = 12 °, ω = 30 ° ~ 35 ° (fine-tooth cutter) and ω = 40 ° ~ 45 ° (coarse tooth cutter). Coarse teeth have teeth less cylindrical cutter, high cutter strength, the chip large space, regrinding more times, and suitable for coarse plus. More than a fine-tooth cylindrical cutter teeth, smooth, suitable for finishing. Can be combined with a larger number of tungsten carbide milling cutters together for wide plane, requiring a combination of time is needed about interleaved helical teeth.

Characteristics of Tungsten Carbide Milling Tool

Tungsten carbide milling cutter milling method according to changing on a milling cutter can go to the feed direction of the tool axis of rotation along the cutting action sports related. For example: by a combination of face milling cutting action of the milling cutting edge is performed, the main advantage of the cutting action on the periphery, and to some extent also with the surface of the cutting action of the milling cutter. Milling tool along the workpiece rotation at right angles to the radial direction of feed. Three-blade milling milling around the main use of the tool cutting edge milling. Milling cutter parallel to the tangential feed pivoting. Plunging end or the end of the main use of the tool cutting edge, and through the axial feed, to perform the role of a local milling.

Tungsten Carbide Milling Cutter

Tungsten carbide cutter is a kind of multi-blade knives, cutting edge total length is longer while participating in cutting, cutting no air travel, you can use a higher cutting speed cutting, productivity generally higher. Carbide cutter can be used for the machining plane, groove, stairs, etc., can also be processed gear, thread, tooth spline shaft and various shaped surfaces. Tungsten carbide milling cutter rotary motion is the main motion, linear motion of the workpiece is feed movement. Carbide cutter during milling process, the direction of rotation of the workpiece relative to the direction of feed and milling Climb milling is generally divided into two and the inverse. Typically used for CNC machining centers, CNC engraving machine, can also be installed on some of the more common hard milling complex heat-treated material is not processed.

How to Prevent Tungsten Carbide Cutter Wear

First, the first point to choose a reasonable milling insert grade, should be high toughness, low thermal cracking susceptibility, and has good heat resistance and wear resistance blade material. For example: during milling steel, can be YS30, YS25 other brands blade; YD15 other brands can be used during the milling of cast iron prevents blade cutter wear.

Second, we want a reasonable selection of milling parameters, under certain processing conditions, the existence of a safe work area does not produce damage. Select the cutting speed and safety in the work area the amount of feed per tooth, we can make the milling work properly to prevent tungsten carbide cutter wear.

Finally, a reasonable choice of the relative position between the workpiece and the cutter, because it can reduce the wear face milling plays a decisive role.

Tungsten Carbide Cutter Wear

Tungsten carbide cutter wear and tungsten carbide tools similar basic laws, cutting thickness than conventional high-speed steel cutter is small, especially when milling, extrusion teeth on the product surface, glide more serious, so milling blade wear occurs mainly in the back. When tungsten carbide face milling cutter steel, because of high cutting speed, chip along the front of the sliding speed large, so when worn behind the front also has a smaller cutter wear. When carbide for high-speed intermittent cutting face mills, make teeth experiencing repeated mechanical impact and thermal shock, caused by fatigue cracks damaged teeth. The higher the speed milling, milling wear occurs sooner and more serious. Most tungsten carbide face mills because of fatigue damage and thus lose the cutting ability. If the cutter geometry selection unreasonable or improper use, tooth strength is poor, big teeth withstand impact, it will produce no cracks cutter wear.

Classification and Use of Tungsten Carbide Planer

Tungsten carbide planer free if divided according to purpose, then, can be divided into longitudinal, transverse, grooving, cutting and shaping planer five. Carbide and tungsten carbide planer structure substantially similar tools, but when the work is intermittent cutting carbide planer, by the impact load. Therefore, in the same cross section of the cutting, turning larger than the shank cross-sectional dimensions of 1.25 to 1.5 times, and the use of a large negative blade angle (-10 ° ~ -20 °), in order to improve the performance of the cutting edge of the impact load. To avoid carbide planer Arbor bending deformation under cutting forces, allowing the blade to bite into the workpiece, usually elbow planer. Often used in welding heavy machinery manufacturing - machinery clip-planer upcoming welded knife blade head, then clamped on the arbor to facilitate tool welding, grinding and handling. When planing large plane, can be rolled cut planer, the cutting part of the bowl-shaped head. A circular cutting edge is continuously rotated under the action of the cutting force, and thus a uniform tool wear, high life.

Tungsten Carbide Die Cutter Introduction

Tungsten carbide die cutter used for machining the mold cavity or convex molding surface, through the evolution of end mills, they formed a tungsten carbide die cutter. It can be divided according to the working part of the conical shape mills, ball mills cylindrical and conical ball nose end mills three. Carbide die cutter is so widely used, in addition to a variety of mold cavity milling, you can also replace the hand with a file and grinding wheel to clean casting, forging, flash welders, as well as some of the shaping surface finishing and so on. If installed in the pneumatic or electric tools, productivity and durability than increase the number of times the wheel and rasp.

Methods Tungsten Carbide Thread Milling Cutter

When tungsten carbide thread milling cutter screw thread milling cutter can rely on different structures, different materials used, can generally be divided into: a disc-shaped screw thread milling cutter method, comb thread thread milling cutter method, NC thread milling method and thread milling method whirlwind four. Disc-shaped thread mill with ordinary dual-angle cutter bit similar, the main purpose is single-line and multi-line milling trapezoidal thread and worm. Comb thread cutter tooth type is mainly used for smaller, shorter lengths of various cylindrical threaded processing, can also be processed various taper thread. Whirlwind milling method is a method of high-speed milling thread. Cutting external thread milling head with a whirlwind mainly two: endo-law whirlwind milling head and exo-law whirlwind milling head.

Tungsten Carbide Chasers Introduction

Tungsten carbide chaser is like the round die four teeth one by one separately, consisting of a group of four. Tungsten carbide cutting portion chaser and Taps and round die is the same, but because the chaser is more solid than taps and round die, so it will be a relatively small number of teeth. When installed in the mold base Carbide chasers use. After threading die holder will automatically open chasers from the outside, eliminating the exit steps with round die when processing thread. Contact method tungsten carbide chasers and the workpiece, from the appearance point of view, can be divided into radial, tangential and round three.

Tungsten Carbide Thread Cutter Classification

Tungsten carbide thread cutter is a tool for machining internal and external threads. Classify, it can be divided into classes turning, milling class, broaches class and thread rolling tools. The most common and broader application is tap. In many ways the various transmission mechanism, fastening parts and measuring tools, etc., are widely used tungsten carbide thread cutting tools. Because of different purposes, the shape, precision, finish requirements are also different. According to different shapes, finish, precision and production volume of thread, the processing method and the tool employed is also different. Depending on the method of processing threads, thread cutter carbide tools can be divided into thread rolling, thread cutter, thread turning, thread chasers, taps and dies, thread cutting head,, high-speed milling cutter and screw the threaded grinding wheel.

Tungsten Carbide End Mills Classification

Tungsten carbide end mills are generally divided into integral indexable end mills and end mills. When the time 3 ~ 20mm in diameter can be made integral end mills; when the diameter is between 12 ~ 50mm can be made indexable end mills. Monolithic tungsten carbide end mills are divided into standard helix angle and the large helix angle cutter, standard helix angle is usually 30 ° or 45 °; large helix angle is generally 60 °, the number of teeth is 2,4,6 teeth. 6 large helix angle milling cutter teeth cut smooth, radial cutting force, suitable for finishing. Standard helix angle milling cutter teeth less chip flutes, and have a 1 to 2 cutting edges through the center, suitable for hand roughing. Indexable carbide end mills can be divided in accordance with the structure and purpose of the ordinary type, drilling and milling type and helical type three. Indexable milling cutter diameter is small, the space occupied by clamping the blade is very limited, so the general use of pressure-hole. Road tablets can be divided into paperback and vertical pressure-hole pressure mounted blade hole and so on.

Tungsten Carbide Broach Composition Structure

Although a wide range of tungsten carbide broach, but the composition of the structure are similar. Such as standard round hole in the structure and composition of tungsten carbide broach generally: the handle portion, and its role is to pull the knife holder and the transmitting power; neck, the role of the ligation; the transition cone, the leading portion of the broach is introduced workpiece; preamble portion, play a guiding role in avoiding broach skew; cutting teeth, cutting the work completed by the coarse and fine cutting teeth gnashing of teeth composition; alignment of teeth, from the repair of light and calibration effect, and as a fine tooth gear cutting reserve; rear guide after the prop handle, bearing the Torah knife; Ministry for supporting the workpiece to prevent tooth cut off antecedents sagging and damage the machined surface of the workpiece and the cutter.

Tungsten Carbide Broaches Broaching Way - Block-Type Broaching

Tungsten carbide broaches broaching way of broaching the way sub-block, also known as round-cut way of broaching. Block type broaches take three teeth, between the teeth group had a greater amount of tooth liter ƒz, each group consisting of three teeth, tooth blade staggered distribution of the first two, they were working surface resection margin, final round tooth from the wiper effect. In addition, there are also made​of the group, regardless of teeth, each tooth cutting teeth have a larger liter volume, the cutting edge of the adjacent teeth showed a staggered distribution for interleaved block broaching.

Tungsten Carbide Broaches Broaching Way - Hierarchical Broaching

Tungsten carbide broaches broaching hierarchical manner broaching, each allowance each cut by a cutter. According to the product surface contour of the final formation process, divided into the same profile type had become two. With profile-type broaching method refers to the final profile shape of each tooth profile shape and the machined surface similar to the final profile shape is made after the last cutting teeth broaching formation. Had become the type broaching method refers to the machined surface after the final profile shape is done by broaching cutter convergence formation.

Tungsten Carbide Broaches Broaching Way

Definition tungsten carbide broaches broaching way is by broach teeth removed from the workpiece surface allowance ways. Broaching way into hierarchical, block and Omnibus three ways. Broaching the main features of three different ways carbide broach is: the same profile tiered broach tooth rise was smaller, high-quality broaching, broach longer. Had become the same profile type broaches broaching easier when forming surface broach manufacturing, broach poor quality; segmented broach tooth-liter capacity, suitable for broaching large size, large margin surface, can also be pulled rough cut surface, the short length of the broach, high efficiency, but it is not easy to improve the quality of broaching; General formula pull broaching tool has the same way of the hierarchical profile of the advantages of block broaching, the current balance of a larger circular hole broaching often use integrated round broaches.

Tungsten Carbide Broach the Classification and Uses

Tungsten carbide broach generally used for overall manufacturing high-speed steel, tungsten carbide broaches often as modular, due to higher productivity, longer life expectancy and other characteristics, often in the automotive industry in the processing block and bearing caps, etc. parts. Carbide broach classification from parts machined surface, broaches structure and use three different methods to divide. According to the surface to be machined can be divided into different parts and outer Broach Broach two kinds; press tungsten carbide broach monolithic structure can be divided into broaches, broach welding, assembly-type broaches and broach tipped four kinds; by the use of different methods can be divided into broaches, push knives and rotary broach three.

Tungsten Carbide Cutting Tools for Drilling and Cutting Fluid Chip Control

Drilling swarf control and tungsten carbide tool cutting fluid is drilling in the key. Generate the appropriate shape and size as well as drilling cuttings exclude them for any drilling processes are essential. In this case, if no satisfactory performance due to any tungsten carbide cutting tool for drilling the drill cuttings will be stuck in the hole cutting is stopped in a short time. Modern drill high cutting speed and high feed are available through the use of cutting fluid becomes possible when effective chip evacuation. Tungsten carbide cutting tool during the drilling fluid is for use in a metal cutting, grinding process used to cool and lubricate the tool and the workpiece industrial fluids, cutting fluid is a combination of the super-functional additives Science composite compatibility made.

Tungsten Carbide Cutting Tools and Drilling in The Force and Power

When tungsten carbide drill through the product to remove unwanted metal, tungsten carbide cutting tools and drilling in the cutting forces acting on the carbide drill. So for carbide cutting tools have some drilling drilling power requirements. Drilling power in addition to material factors, drilling power (Pc) but also with the diameter, feed rate and cutting speed related. Required drilling approximate calculation formula can be used to check the power of the drilling machine can meet the power needs. For modern machine tools, most medium-diameter hole drilling carbide tools is not a problem, but there are times for large aperture diameter hole depth, it still needs to check the drilling power. 

For the large-diameter step of carbide tools for drilling, in particular when considering the trepanning cutter bits is subjected to total drilling torque, the torque value in nanometers is another valid value. Feed, diameter, material is the main factor affecting the torque values. Torque is the sum of the torque on each cutting edge is tangential to the center of force and the radial distance from the path of the product.