Tungsten Carbide Cutting Tool Chipping Causes and Solutions

Use tungsten carbide cutting tools may appear chipping phenomenon occurs chipping a variety of reasons, reasons that may occur are: insert grade, specification poor choice. If the thickness of the blade is too thin, or too hard when roughing selected grades too brittle. Its solution: increase the thickness of the blade or blades mounted upright, bending strength and high toughness selection of brands; tungsten carbide tool geometry parameters properly (such as before and after the angle is too large, etc.). Its solution: You can proceed from the following aspects of the redesign of tungsten carbide cutting tools: (1) appropriate to reduce the front and rear corner; (2), the use of large negative edge inclination; (3) to reduce the main angle ; (4), using the large negative edge chamfer or arc; (5), grinding the cutting edge transition, enhanced tip.

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.

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) .

Tungsten Carbide Cutting Tool Drilling Parameters In

Tungsten carbide cutting tools and drilling is based on carbide drill or reamer hole machining mold parts on drilling methods, drilling tool and the workpiece relative motion and axial feed movement. Carbide cutting tool drilling parameter refers to the cutting speed, feed per revolution, penetration or feed rate and depth of the hole four parameters. The cutting speed is at a point on the cutting edge with respect to the surface to be machined in the direction of the main movement of the instantaneous speed. From the standpoint of hole machining, the bore may represent a major factor characteristic comprises: the diameter, depth and quality of materials, processing conditions, or conditions, reliability, productivity.

Carbide cutting tool drilling parameters of cutting speed, usually with the letters VC expressed in units of m / min, is determined by the circumferential speed, the cutting speed can be calculated using the spindle speed (n) to get. Spindle speed is expressed in revolutions per minute. In a turn, the drill perimeter of π × Dc, Dc for drill diameter. Drilling cutting cutting parameters will change, depending on the cross section of drill cutting edge. From the center to the circumference of the drill, its speed from zero to the maximum. The recommended maximum speed of the peripheral cutting speed.

Tungsten Carbide Cutting Tool Milling process

Tungsten carbide cutting tools for milling through multi-tool cutting edge can be rotated along the product implementation programmable feed motion in any direction, thus completing the metal cutting. This makes the cutting action of the milling becomes a very effective and can be widely used processing method. According to pass a limited way, the milling cutter each cutting edge a number of metals can be removed, so that the cutting chip has been formed and is not a very important problem. The most common application of carbide cutting tools are used to generate planar milling, face milling which is the same, but with five-axis machining centers and multi-tasking machine tool increasing number of other processing methods and surface processing methods has also been considerable development.

Tungsten Carbide Cutting Tool Cutting Layer Parameters - Part 1

Tungsten carbide cutting tools for cutting layer cutting section cut through the workpiece material layer is a way of cutting the workpiece being removed. Cutting layer shape, the deformation directly affects the size of the cutting process, the load on the tool and tungsten carbide cutting tool wear. When the main cutting edge and the secondary cutting edge is a straight line, and the blade angle equal to 0 °, the main angle greater than 0 °, cutting layer nominal cross-section of a parallelogram, when the main angle equal to 90 °, cutting layer nominal rectangular cross section . Carbide cutting tool cutting layer dimension refers to the base surface tungsten carbide cutting tools cutting layer metric length and width dimensions of tungsten carbide cutting tools and cutting parameters cutting layer cutting depth, feed size. But the direct impact of the cutting process the cutting layer and the thickness of the cross-sectional width dimension.

Tungsten Carbide Cutting Tool Cutting Elements

Tungsten carbide cutting tool cutting elements include working angle tungsten carbide cutting tools, tungsten carbide cutting tool cutting basics, cutting motion tungsten carbide cutting tools and cutting the amount of tungsten carbide cutting tools and cutting layers and cutting detailed way. Different types of carbide cutting tools, its flank, the number of different cutting edge. But the most basic units of carbide cutting tools are two sides of a blade, a blade on both sides by two flank converge to a cutting edge. Any complex carbide cutting tools can be divided into a basic unit for analysis.

Tungsten Carbide Cutting Tools Working Angle

Changes tungsten carbide cutting tools working angle of tungsten carbide cutting tools because of the mounting position, change the cutting direction changes in the synthesis of movement. Therefore, the process of cutting tool angle, we should take the relative position of tungsten carbide cutting tool and the workpiece, thereby establishing the basis of the relative motion of reference, this reference system called the work of reference. Tool angle defined by the work of reference called working angle. In order to ensure smooth machining, machining to obtain acceptable surface, the cutting portion of the tool must have a reasonable geometry. The tool is a key factor used to determine the angle of the cutting tool part geometry.

Tungsten Carbide Cutting Tool to Install The Tool Working Angle of Impact

Tungsten carbide cutting tool installation tool has a greater impact on the work of the angle, the following will handle skewed impact on the work the Lord, vice declination; affect the level of cutting edge installation before work, after the corner; feeding direction of movement impact on tungsten carbide cutting tools work the primary and secondary angle and the vertical feed motion of the aspects of tungsten carbide cutting tools before work, after the angle of impact and so forth is not parallel to the axis of rotation of the workpiece. Tungsten carbide cutting tools working angle is considered a separate factors, skew or affect the level of the actual workpiece tungsten carbide cutting tools may have both installed, another feed affect movement. You should consider the impact of the comprehensive results of the overlay will come.

Handle skew impact on the work the Lord, vice declination: After turning counterclockwise rotation with the Quartet Ø corner turret, working the main angle increases, job deputy angle will be reduced. For example refined car adjustable positive Ø = k'r, then turning work vice declination equals 0 ° of k're. (See below: handle skew the primary and secondary angle on the job)

Factors Affecting the Life of Tungsten Carbide Cutting Tools

Factors that affect the life of tungsten carbide cutting tools includes the following:

Cutting speed Vc: increase the cutting speed Vc, the cutting temperature increased, wear and tear, so that the tool life T is reduced.

Feed back to eat with a knife amount αp: ƒ and αp increases the tool life are reduced, but after ƒ increases, cutting temperature more, so a greater impact on T; αp increases, improved heat dissipation conditions, it is less temperature rise of the cutting, and therefore has little effect on tool life.

Impact of tool geometry parameters: the tool geometry parameters affect tool life are: the front corner, the main angle, angle and nose radius deputy. Reduce the main angle, angle and increased Vice corner radius, can play to improve strength and reduce the cutting tool temperature effects, are conducive to improving tool life.

Workpiece material: the strength of materials processing, higher hardness and toughness, cutting both make cutting temperature, reduced tool life.

Tool material: tool material is an important factor affecting tool life, tool material such as thermal conductivity, higher wear resistance, longer cutting tool life, therefore, the choice of high-performance coated tool and tool material, is to improve the tool life effective way.

Types of Tungsten Carbide Cutting Tools Cutting Fluid

Tungsten carbide cutting tools is divided into two kinds of fluid to cool the main water-soluble cutting fluid to lubricate based and oil-soluble cutting fluid. Can be divided into an aqueous solution of water-soluble cutting fluid, emulsion and synthetic cutting fluid three. Oil-soluble cutting fluid can be divided into cutting oil and extreme pressure cutting oil two kinds. Solid lubricants are used most of molybdenum disulfide. Use molybdenum disulfide to prevent and suppress BUE produce, reduce cutting forces, can significantly extend the life of tungsten carbide cutting tools, reducing the surface roughness, eliminating the machined surface ripples and indentation, and carbide tool life can be doubled improved.

Tungsten Carbide Turning Tool Basics

Tungsten carbide cutting tools for turning, having a cutting portion of the tool, widely used in horizontal lathes, turret lathes, automatic lathes and CNC lathe tool. Carbide cutting tools should be one of a wide range of cutting tool machining. Working part carbide turning tool is part of the generation and processing chips, including the blade, the chips broken off or rolled structural elements of the structure, chip or chip capacity storage space, cutting fluid channel and so on.

Tungsten carbide turning tool cutting portion by the main cutting edge, the secondary cutting edge, the front cutting edge, behind the rear cutting edge and the secondary cutting edges and other components. Turning general lathe. Lathe machining a wide range, the process a variety of outside surface of revolution, helical surface, elliptical cylinder and so on. When turning, the rotary movement of the workpiece do carbide cutting tools made ​​of straight or curved movement of the tool tip relative to the workpiece motion at the same time, the removal of a workpiece material, so as to form the corresponding workpiece surface. Among them, the rotary motion of the workpiece for cutting the main motion, linear or curvilinear motion of tungsten carbide cutting tools for the feed motion, both of which together constitute the cutting shaping movement.

Tungsten Carbide Turning Tool Classification - Part1

How lathe cutting a satisfactory product, proper preparation and use of tungsten carbide cutting tools is a very important factor. The different needs of different shapes of carbide products require turning tools, cutting edge with different materials require different knife angle, position and speed turning tool and work piece should have a certain relative relationship, tungsten carbide cutting tools themselves should having sufficient hardness, strength and wear resistance, high temperature. Carbide cutting tools for classification, is undoubtedly the right choice of carbide cutting tools for laying a solid foundation. Carbide cutting tools are generally classified according to head material classification, according to the structural classification, according to the shape classification, according to the function and purpose of classification and other classification methods.

Boring and Tungsten Carbide Boring Tool

Boring boring tool is generally used is the use of tungsten carbide cutting tools in a single blade boring tool, also called tungsten carbide boring tool, it is an expansion of holes or other circular contour with an inner diameter of turning boring tools technology, boring range of applications in general from roughing to semi-finishing. Boring is usually conducted on a combination of machine tools and machining centers, boring mainly used for machining the workpiece cylindrical bore casing, frame and base, etc., threaded holes, hole trenches and face; When using a special attachment when boring also can be processed inside and outside the sphere, the cone hole and so on.

Tungsten Carbide Cutting Tools Welding Flux

Tungsten carbide cutting tools welding uneven heating occurs if a good part of the welding and the other part of the welding bad phenomenon that reduces weld strength. After reaching the temperature for soldering alloy sheet according to the size, should be incubated for 10 to 30 seconds so that the surface of the cemented carbide tools, welding temperature uniformity. The main role of soldering flux carbide alloy sheet is to prevent the surface of the groove in the insert and the heating and oxidation, and to carbide precipitation of impurities in the welding material to facilitate the formation of scum carbide welding tool. In addition to the liquidity of tungsten carbide cutting tools welding flux welding surface allows good wetting, increased carbide welding materials.

Welding Material Requirements of Tungsten Carbide Cutting Tools

Tungsten carbide weld material to be formed has sufficient plasticity so that the solder itself by plastic deformation of the stress relief part of the welding; appropriate melting point of solder, weld metal is lower than the melting point of at least 40 ° to 60 ℃ but requires higher than the operating temperature of weld 300 ℃, this way you can ensure that the tool can work in high-speed cutting time. Under the conditions allowed, should try to reduce the melting point of the solder to reduce heat stress and deformation welding carbide cutter body because heat generated. Due to uneven heat distribution, rapid heating and rapid cooling of the alloy may also produce significant transient stress. Rapidly heated, subjected to a tungsten carbide cutting tools outer layer stress, the intermediate layer is subjected to a tensile stress.

YT, YW Class Grades of Tungsten Carbide Cutting Tools for Machining Applications

YT14 tungsten carbide cutting tools is used for processing carbon steel and alloy steel processing materials, mainly for uneven roughing section and continuous cutting and interrupted cutting of semi-fine cars and fine cars; continuous surface roughing cast expansion of drilling holes and rough diamond; Carbide YT15 is used to process carbon steel, alloy steel (including forgings, stampings and castings epidermis), mainly for roughing uneven sections and interrupted cutting, rough planing, semi-refined planing, rough milling and drilling discontinuities. YW belong carbide alloy steel and cast iron machining range of materials, belonging to the alloy steel and cast iron carbide material category has four grades. They are YW1, YW2, YW3 and YW4. YW1 which is used to process steel, alloy steel and cast iron, can withstand a certain degree of shock loading versatility better. YW2 and YW1 same, also used to process steel, alloy steel and cast iron.

The difference is that with YW1 , YW2 mainly used in heat-resistant steel , high manganese steel, stainless steel and high alloy steels difficult to machine , such as roughing and semi-finishing . YW3 is used to process heat-resistant alloy , high-strength low-alloy and alloy steel, finishing and semi-finishing , roughing can be used as a small impact situations. YW4 is used for processing carbon steel , alloy steel, quenched and tempered steel and heat-resistant stainless steel , thus requiring YW4 must have good heat resistance and high temperature bonding ability , versatility is better.

YN, YG Class Grades of Tungsten Carbide Cutting Tools for Machining Applications

YN carbide processing materials include steel and iron alloy, tungsten carbide cutting tools and YN10 YN05 YN divided into two kinds of carbide grades. YN05 processing materials which are steel, cast steel, alloy cast iron, mainly used in machine tool - workpiece - tool system of rigid elongated member particularly good finishing and high-speed cutting of fine cars; tungsten carbide tooling materials mainly include YN10 carbon steel, alloy steel, steel and hardened steel workpiece. YN carbide is mainly applied to continuous surface finishing, the elongate member and the workpiece surface finish for high finishing. YG carbide machining range of materials including cast iron, nonferrous metals and alloys, non-metallic materials, YG divided into seven kinds of tungsten carbide cutting tools carbide grades.

YG Grades of Tungsten Carbide Cutting Tool for Processing and Application

Tungsten carbide cutting tool YG6A processing materials are cast iron, nonferrous metals and alloys, tungsten carbide cutting tools can be applied to both YG6A semi-finishing can be applied to high-manganese steel, hardened steel, alloy steel, semi-finishing and finishing; Carbide Tool YG6X processing materials include chilled cast iron, ordinary cast iron and heat-resistant alloys, tungsten carbide cutting tools YG6X for finishing and semi-finishing; YG6 tungsten carbide tooling materials include cast iron, non-ferrous metals and their alloys , non-metallic materials, tungsten carbide cutting tools YG6 apply continuous surface roughing, semi-finishing discontinuities cars and fine cars, a small section of fine cars, coarse threading, cyclone wire, continuous surface finishing and semi-intensive milling, hole expanded and refined crude expansion.

Tungsten Carbide Cutting Tools Used in Aerospace

Tungsten carbide tools are widely used in the aerospace field. Due to poor heat super alloy cutting, deformation resistance, work hardening, and high processing temperatures, heat-resistant super alloys for processing, with the super-hard materials such as ceramics and PCD higher processing costs and other factors so now the basic domestic PVD coated tungsten carbide are used on secondary processing aerospace, titanium aluminum nitride Lv has excellent performance when cutting the continuous high temperature, heat resistant super alloys and processing for extensive use of titanium aluminum nitride PVD coating tungsten carbide cutting tools. America has a heat resistant super alloys and processing characteristics in the field of early development of PVD coating KC730 and KC732, recently launched PVD coating KC5510 and KC5525.