Cemented carbide Roll plate is a high-efficiency production workpiece external thread rolling tool. Cemented carbide Roll plate rolling subjected to intense friction, and withstands shock loads and squeeze pressure, failure usually in the form of the teeth wear, pitting, chipping teeth and flaking.
Cemented carbide Roll plate generally refers to the flat-shaped Roll plate processing thread is a round trip. Arc Roll plate is the thread of continuity feeding roll system, it can save the flat cemented carbide Roll plate and from emptying time. Flat cemented carbide twist wire board due to the stroke limit, generally only used the thread following the machining diameter of 24mm, and because the press-in portion of the thread forming process and the correction part of the length limitations, the workpiece forming process time short pressure workpiece roundness error, not suitable for processing thin-walled parts.
2013年8月28日星期三
Cemented Carbide Thread Roller Introduction
Often threading tool, die, thread cutter, cutting tool machining external thread, also widely used rolling, rubbing pressure and squeeze the threaded portion forming process using cemented carbide thread roller threaded part of the processing forming is one of the rolling method.
Cemented carbide thread roller teeth withstand impact, squeezing and friction. Chipping cemented carbide roll in the form of wire wheel failure, fatigue spalling and wear. Therefore, carbide thread roller requires a high-strength; high wear resistance and good toughness. Cemented carbide rolling the wire wheel is usually used Cr12MoV steel.
Cemented carbide thread roller teeth withstand impact, squeezing and friction. Chipping cemented carbide roll in the form of wire wheel failure, fatigue spalling and wear. Therefore, carbide thread roller requires a high-strength; high wear resistance and good toughness. Cemented carbide rolling the wire wheel is usually used Cr12MoV steel.
Cemented carbide thread rolling tools Introduction
Often threading tool, die, thread cutter, cutting tool machining external thread, also widely used rolling, rubbing pressure and squeeze the threaded portion forming process using cemented carbide thread roller threaded part of the processing forming is one of the rolling method.
Cemented carbide Roll plate
cemented carbide Roll plate is a high-efficiency production workpiece external thread rolling tool.
Cemented Carbide Chaser Introduction
So-called cemented carbide chaser is as if the four circular die tooth a separate, composed of a group of four.
Cemented carbide thread chasers use mounted in the die shoe. The finished thread die holder will automatically chaser opened from the outside, eliminating the need for the withdrawal of step with circular die processing thread.
Cemented carbide chasers with the workpiece contacting method, viewed from the outer radial, tangential and round three, can be divided.
Cemented carbide thread chasers use mounted in the die shoe. The finished thread die holder will automatically chaser opened from the outside, eliminating the need for the withdrawal of step with circular die processing thread.
Cemented carbide chasers with the workpiece contacting method, viewed from the outer radial, tangential and round three, can be divided.
Cemented Carbide Thread Milling Cutters Classification
Thread milling,cemented carbide thread milling cutters, different structures, different
materials, the thread milling method can be divided: disk-shaped thread
milling thread milling, comb-shaped thread milling thread milling, CNC
thread milling, whirlwind thread milling.
Cemented Carbide Cutting Dies Applications
The cemented carbide cutting dies suitable for machining in the cast iron, heat-resistant alloy steel, hardened steel, hard material, such as workpiece outer thread is also suitable for use in the relatively soft material of aluminum alloy or the like on the workpiece machining external thread, particularly aluminum alloy material of the workpiece on the processing the external thread, the processing efficiency, the threaded surface roughness, and thread size stability are die of other materials can not achieve. The wear resistance of cemented carbide cutting dies are cutting dies can not be compared to the other materials.
The cemented carbide cutting dies manufacturing a much more than ordinary dies and high-speed steel teeth difficult, mainly when in processing cutting dies threaded, there are still some processing process issues. Specifications cemented carbide cutting dies casing Usually back manufacturing, steel blade with carbide materials. Its structure is the edge back less than ordinary cutting dies of the same specifications, the chip holes are drilled in the oval (see figure), greatly increasing the chip space, conducive to cutting. Ordinary cutting dies and high-speed steel teeth, cemented carbide cutting dies use of the range of small, suitable for processing large quantities of the workpiece. Cemented carbide cutting dies does not have the versatility.
The cemented carbide cutting dies manufacturing a much more than ordinary dies and high-speed steel teeth difficult, mainly when in processing cutting dies threaded, there are still some processing process issues. Specifications cemented carbide cutting dies casing Usually back manufacturing, steel blade with carbide materials. Its structure is the edge back less than ordinary cutting dies of the same specifications, the chip holes are drilled in the oval (see figure), greatly increasing the chip space, conducive to cutting. Ordinary cutting dies and high-speed steel teeth, cemented carbide cutting dies use of the range of small, suitable for processing large quantities of the workpiece. Cemented carbide cutting dies does not have the versatility.
Cemented Carbide Cutting Die Introduction
Cemented carbide cutting die is standard toosl for processing and trimming thread. The basic structure of the cutting die is a nut, axially out of the holes to form in front of the cutting teeth of the chip. Simple structure, easy to use,cutting dies in small batch production applications is very broad.
Taps for processing the internal thread, the external thread used with this relative machining tool is a circular die. Circular die structure is shown in FIG. The left and right end faces of the circular die are getting the cutting cone angle 2Ф, after the formation of the addendum by grinding the angle.
Circular die where longer part of the side of the cutting (cutting cone), said that this side is positive, write the name, grade, material grades and manufacturers ".
The rake angle of the circular die, the function of the chip flutes, the cutting portion, the rear corner and the tap is the same, but the mutual positional relationship with the workpiece tap opposite. The chips discharged from the cutting edge around the hole.
Taps for processing the internal thread, the external thread used with this relative machining tool is a circular die. Circular die structure is shown in FIG. The left and right end faces of the circular die are getting the cutting cone angle 2Ф, after the formation of the addendum by grinding the angle.
Circular die where longer part of the side of the cutting (cutting cone), said that this side is positive, write the name, grade, material grades and manufacturers ".
The rake angle of the circular die, the function of the chip flutes, the cutting portion, the rear corner and the tap is the same, but the mutual positional relationship with the workpiece tap opposite. The chips discharged from the cutting edge around the hole.
2013年8月22日星期四
Cemented carbide Taps Cutting & Applications - Part 5
Simple operation, widely used
Since cemented carbide taps are forming toosl, when used only to provide the rotation driving and moderate axial force, and therefore easy to operate. Another cemented carbide taps more varieties, both manual and machine processing screw holes; the existing cutting cemented carbide taps, there are broaching the taps and squeeze taps. Therefore can be machined the various workpieces screw holes, a very wide range of applications.
Since cemented carbide taps are forming toosl, when used only to provide the rotation driving and moderate axial force, and therefore easy to operate. Another cemented carbide taps more varieties, both manual and machine processing screw holes; the existing cutting cemented carbide taps, there are broaching the taps and squeeze taps. Therefore can be machined the various workpieces screw holes, a very wide range of applications.
Cemented carbide Taps Cutting & Applications - Part 4
High-speed cutting
With the advancement of science and technology, the development of cutting technology, the need for efficient processing, application of superhard materials, carbide materials and coating technologies, design and manufacture of taps, CNC machining centers and equipment, cemented carbide taps tapping high cutting speeds, tapping generally up to tens of meters / s cutting speed, greatly improves the processing efficiency.
With the advancement of science and technology, the development of cutting technology, the need for efficient processing, application of superhard materials, carbide materials and coating technologies, design and manufacture of taps, CNC machining centers and equipment, cemented carbide taps tapping high cutting speeds, tapping generally up to tens of meters / s cutting speed, greatly improves the processing efficiency.
Cemented carbide Taps Cutting & Applications - Part 3
Low-speed, large amount of feed cutting
To avoid the damage of cemented carbide taps broken and excessive cutting heat caused by increased dramatically clogging trench cutting edge of common cemented carbide taps, cemented carbide taps tapping generally use lower cutting speeds. The machine tapping generally use the cutting speed of a few meters / sec to 10 meters / sec, significantly lower than the thread milling and turning; while the manual tapping the cutting speed is lower. Further, taps axial feed mainly rely on its threaded spin into the cutting is performed automatically in accordance with the lead (pitch), and may not provide the separate axial feed drive. Even in the processing of high-precision machining center screw holes using synchronous axial feed drive federates still a lead (pitch) / rev, much higher than the feed rate of the thread milling.
To avoid the damage of cemented carbide taps broken and excessive cutting heat caused by increased dramatically clogging trench cutting edge of common cemented carbide taps, cemented carbide taps tapping generally use lower cutting speeds. The machine tapping generally use the cutting speed of a few meters / sec to 10 meters / sec, significantly lower than the thread milling and turning; while the manual tapping the cutting speed is lower. Further, taps axial feed mainly rely on its threaded spin into the cutting is performed automatically in accordance with the lead (pitch), and may not provide the separate axial feed drive. Even in the processing of high-precision machining center screw holes using synchronous axial feed drive federates still a lead (pitch) / rev, much higher than the feed rate of the thread milling.
Cemented carbide Taps Cutting & Applications - Part 2
Thin layer cutting
The cemented carbide taps of the multiple blade forming the cutting structure, so that its respective cutting teeth of the cutting layer of small thickness, only a dozen of microns to several hundred microns, belonging to the thin layer cut areas. Cemented carbide taps other tool, the cutting edges are inevitably there is a tiny arc cutting thickness and edge radius close weakened, increased compression, resulting in the cutting force and cutting heat than high. Especially after cemented carbide taps with blunt or chipping defects, cutting force will increase sharply, the rapid loss of use features. Cemented carbide taps production, on the one hand the need to improve the grinding quality, reducing the corner radius; the other hand, we must strictly control the heat treatment of grain size of the material, to improve the toughness and strength, a tendency to reduce chipping.
The cemented carbide taps of the multiple blade forming the cutting structure, so that its respective cutting teeth of the cutting layer of small thickness, only a dozen of microns to several hundred microns, belonging to the thin layer cut areas. Cemented carbide taps other tool, the cutting edges are inevitably there is a tiny arc cutting thickness and edge radius close weakened, increased compression, resulting in the cutting force and cutting heat than high. Especially after cemented carbide taps with blunt or chipping defects, cutting force will increase sharply, the rapid loss of use features. Cemented carbide taps production, on the one hand the need to improve the grinding quality, reducing the corner radius; the other hand, we must strictly control the heat treatment of grain size of the material, to improve the toughness and strength, a tendency to reduce chipping.
Cemented carbide Taps Cutting & Applications - Part 1
The semi-enclosed, multi-flute molding cutting
Cemented carbide taps tapping the circumferential direction of the more cutting edge work together, cutting the cemented carbide taps edge back or squeeze taps ridge cut (squeeze) into the bottom hole wall, only in the groove or ridge between the back and screw holes wall leaving a semi-closed cutting space, so that the chip removal and cooling are more difficult. straight flutes cemented carbide taps trench clear accommodate chip significance, to solve cemented carbide taps strength and to accommodate the contradictions of chip space, cemented carbide taps optimize the design of and thus gradually innovative spiral groove, spiral point cemented carbide taps varieties. Further, cemented carbide taps the tooth profile and the pitch and the processing thread is the same, the individual cutting edge drill-cutting to form the final thread. Therefore, the cemented carbide taps are shaped cutting tools, and its threaded accuracy will directly affect the accuracy of the screw hole.
Cemented carbide taps tapping the circumferential direction of the more cutting edge work together, cutting the cemented carbide taps edge back or squeeze taps ridge cut (squeeze) into the bottom hole wall, only in the groove or ridge between the back and screw holes wall leaving a semi-closed cutting space, so that the chip removal and cooling are more difficult. straight flutes cemented carbide taps trench clear accommodate chip significance, to solve cemented carbide taps strength and to accommodate the contradictions of chip space, cemented carbide taps optimize the design of and thus gradually innovative spiral groove, spiral point cemented carbide taps varieties. Further, cemented carbide taps the tooth profile and the pitch and the processing thread is the same, the individual cutting edge drill-cutting to form the final thread. Therefore, the cemented carbide taps are shaped cutting tools, and its threaded accuracy will directly affect the accuracy of the screw hole.
2013年8月21日星期三
Cemented Carbide Taps Feature - part 2
The cemented carbide taps are multi-blade cutter; the process of thread is cut out from the prepared hole of the workpiece, each rotation of the tap, axially moving a pitch. Each screw thread type cutting workload, and is shared by a few teeth of the cutting cone portion, taper taps, not only is shared by the portion of the cutting cone, several teeth, as well as to the location of the base surface after the cutting cone teeth sharing. When the pitch P of certain circumstances, as the increase or decrease of the number of slots N, the amount of each cutting tooth also be reduced or increased. Likewise, cutting the cone angle of Kr decreases or increases, i.e. increase or decrease of the number of teeth of the cutting cone, would decrease or increase amount of each cutting tooth. The amount of each tooth cutting after cutting cone taper taps are relatively balanced. Therefore, in the thread cutting process, the participation of each tooth of the cutting cone, a certain thickness of the metal layer is cutaway. Cemented carbide taps total cutting workload is the metal layer is cut area sum. Thus cemented carbide taps cutting characteristics, which is, cutting small thickness.
Cemented Carbide Taps Feature - part 1
The thread processing features cemented carbide taps are different from turning, milling and the like are open cutting tool, closed cutting tool is different from the broach like. Turning tools cutting its chips can be in a free state expelled naturally; cutter cutting its chips can only be fully retained in the capacity of crumbs tank. The cemented carbide taps turning tools, milling cutters, straight flutes taps through hole tapping, for example, chips in addition to the forward portion discharge, and backward discharged, the vast majority of retention the chip flutes with the bottom hole of the workpiece was half the enclosed space. And if the blind hole tapping, even able after chip removal, good chip evacuation spiral flute taps, the chip can only be limited space between the calm flute and bottom hole outflow.
Cemented carbide taps and other tooling process is also different, complete cutting tapping the forward rotation, the general must also reverse rotation to exit outside the workpiece, and keep the blade intact.
Cemented carbide taps and other tooling process is also different, complete cutting tapping the forward rotation, the general must also reverse rotation to exit outside the workpiece, and keep the blade intact.
Cemented Carbide Taps Introduction
Cemented carbide taps processing thread dedicated tool. Especially, small-diameter internal thread processing, processing of mass production of the internal thread, a cylindrical or conical inner thread processing, using cemented carbide taps tapping is the best choice. It is simple in structure, easy to use and can be manually operated, but also in machine tool applications. In addition cemented carbide taps there are many kinds of structure, to meet the needs of different work for conditions tapping. Therefore, it is the most widely used internal thread processing tools.
Application of Cemented Carbide Coating
Cemented carbide coated inserts are widely used in ordinary steel finishing and semi-finishing and roughing. Coating material includes: TiC, TiN, TiCN, and AL2O3 composite. Carbide the gold blade CVD coating process, the common coating structure is: TiN-Al2O3-TiCN-matrix.
TiC coating has high hardness and wear resistance, oxidation resistance is also good, cutting can produce titanium dioxide film, effectively reduce the coefficient of friction and reduce tool wear. The general cutting speed can be increased by about 40%. TiC and steel is a high bonding temperature, the surface of the crystal grains finer, and rarely produce BUE cutting, suitable for finishing. The TiC coating drawback is formed between the linear expansion coefficients of the base body large difference with the substrate, a fragile decarburized layer, reducing the flexural strength of the tool. Therefore, heavy cutting, the machining of hard material or the workpiece with the inclusions, the coating is easy to crack.
TiC coating has high hardness and wear resistance, oxidation resistance is also good, cutting can produce titanium dioxide film, effectively reduce the coefficient of friction and reduce tool wear. The general cutting speed can be increased by about 40%. TiC and steel is a high bonding temperature, the surface of the crystal grains finer, and rarely produce BUE cutting, suitable for finishing. The TiC coating drawback is formed between the linear expansion coefficients of the base body large difference with the substrate, a fragile decarburized layer, reducing the flexural strength of the tool. Therefore, heavy cutting, the machining of hard material or the workpiece with the inclusions, the coating is easy to crack.
Cemented Carbide Coating Introduction
Thread cutter cemented carbide coating has physical vapor deposition (PVD) and chemical vapor deposition (CVD) two methods. The former is common used with TiN, TiCN, TiALN and its composite coating.Solid cemented carbide taps, solid carbide thread milling cutters and solid carbide cutting tools, and methods can be used as needed PVD coating. Carbide inserts the use of chemical vapor deposition (CVD) method for coating.
The cemented carbide coating had appeared in early 1960s. By chemical vapor deposition (CVD) process, the cemented carbide surface is coated with the refractory metal carbides in one or more layers (5μm ~ 13μm). Good overall performance, good toughness of the matrix strength alloy coating, surface wear-resistant, high temperature. But the coated carbide degree of sharp edge chipping resistance is less than ordinary carbide.
The cemented carbide coating had appeared in early 1960s. By chemical vapor deposition (CVD) process, the cemented carbide surface is coated with the refractory metal carbides in one or more layers (5μm ~ 13μm). Good overall performance, good toughness of the matrix strength alloy coating, surface wear-resistant, high temperature. But the coated carbide degree of sharp edge chipping resistance is less than ordinary carbide.
2013年8月13日星期二
Cemented carbide composition and performance
Cemented carbide is a tungsten carbide hardness and high melting point (known as the hard phase) and a metal (called the binder phase) made by powder metallurgy process.Tungsten carbide tool commonly used carbide such as WC, TiC, TaC, NbC. The adhesive generally used is Co; titanium carbide-based adhesive is Mo, and Ni. Tungsten carbide physical and mechanical properties depend on the alloy composition and thickness of the powder particles as well as alloy sintering process. More hard phase of high hardness and high melting point Contains, the higher the hardness and high-temperature hardness of the alloy. Containing the more binder, the higher strength is.
Cemented carbide threading tools introduction
Cemented carbide threading tools is processing tools
of internal and external threads. It can be divided into Cutters class
cutter, broach and thread rolling tools. Representative wider
application Taps.
Thread is widely used in many aspects of the various transmission mechanisms, fastening parts and measuring tools,. Because of its different uses, its shape, precision finish also has different requirements. , The processing method and the tool also vary depending on the shape of the thread finish, accuracy and the production batch.
Thread is widely used in many aspects of the various transmission mechanisms, fastening parts and measuring tools,. Because of its different uses, its shape, precision finish also has different requirements. , The processing method and the tool also vary depending on the shape of the thread finish, accuracy and the production batch.
2013年8月8日星期四
Face cemented carbide milling cutter introduction
Face cemented carbide milling cutter suitable for machining grooves and order countertops. The facecemented carbide milling cutter addition to the circumference having a main cutting edge, the side surfaces are also the secondary cutting edge, thereby improving the cutting conditions, and to improve cutting efficiency and to reduce the surface roughness, but the thickness dimension larger changes after regrinding. Straight teeth face cemented carbide milling cutter can be divided into the wrong tooth and insert face cemented carbide milling cutter.
Keyway cemented carbide milling cutter introduction
Cemented carbide end mill introduction
Cemented carbide end mill can be divided into integral and indexable. The typical diameter d = 3 ~ 20mm made integral, diameter d = 12 ~ 50mm made indexable.
Indexable end mills according to their structure and purpose can be divided into common type, drilling and milling-type spiral tooth. Smaller diameter indexable end mills, clamp the blade space occupied by a very limited, so generally use the pressure-hole. It can be divided into paperback Road piece pressure hole and stand-mounted blade pressure hole type.
Indexable end mills according to their structure and purpose can be divided into common type, drilling and milling-type spiral tooth. Smaller diameter indexable end mills, clamp the blade space occupied by a very limited, so generally use the pressure-hole. It can be divided into paperback Road piece pressure hole and stand-mounted blade pressure hole type.
How to choose cylindrical cemented carbide milling cutter
Cylindrical cemented carbide milling cutter is used for the machining plane. It can be divided into coarse teeth and fine teeth two kinds. The coarse toothed cylindrical cemented carbide milling cutter has less number of teeth and the strength of the cutter, the chip space, regrinding times for coarse plus. Fine-tooth cylindrical cemented carbide milling cutter many teeth, smooth, suitable for finishing.
Choice of cutter diameter, should have sufficient rigidity and strength to ensure that the cemented carbide milling cutter spindle, the tooth enough chip space, select a smaller value as possible under the conditions of multiple regrinding. Otherwise, the milling power consumption, the cemented carbide milling cutter cut long time, thereby reducing the productivity. Usually select cemented carbide milling cutter diameter according to their milling parameters and cemented carbide milling cutter spindle.
Choice of cutter diameter, should have sufficient rigidity and strength to ensure that the cemented carbide milling cutter spindle, the tooth enough chip space, select a smaller value as possible under the conditions of multiple regrinding. Otherwise, the milling power consumption, the cemented carbide milling cutter cut long time, thereby reducing the productivity. Usually select cemented carbide milling cutter diameter according to their milling parameters and cemented carbide milling cutter spindle.
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