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Heat is the enemy of the cutting tool. Unfortunately, in the tool / workpiece interface, the tool is often sufficient to reduce the need bear limit tool life and performance of cutting tool temperature. To solve this problem, it has developed a variety of tool materials, the most commonly used high-speed steel and carbide. High-speed steel tool has very good strength and toughness, and Carbide Tools at a higher-hardness and red hard (to maintain high hardness at the cutting ability) and better than the. In general, solid carbide cutting tools to achieve high-speed steel cutting speed at least 4 times more than the tool, and a longer tool life. However, compared with high-speed steel cutting tools, carbide cutting tool fracture toughness, limited processing in some areas (especially Tapping) application. And most of the turning, milling and drilling tools of different, tap the cutting edge is weak, and lower its overall strength. Even in the process is relatively easy to cut the workpiece material (eg steel), the carbide is also prone to tap the cutting edge chipping, leading to tool failure. Tapping on low carbon steel, the continuous chip could block the long tap the capacity grove, thus limiting the number of carbide taps applied even more easily than steel tapping of the workpiece material (such as aluminum and cast iron). Steel and other iron group material is the most common needs of processing and assembling with screw material, therefore, cutting tool manufacturers are sparing no effort to develop cutting edge to prevent chipping and breakage of the tap. View of the cemented carbide and high speed steel can be compared to congenital superiority, it has become a development focus carbide tap. Thread of the decision of the thread size precision and adaptation of the precision assembly. Processing within the thread, the tap usually drilling or tapping the head with flexible non-synchronous machine driven, flexible tap tapping head can drive rotation, and to close to within the required rate of lead screw feed. The old machine is difficult to precisely when in the coordination of tapping into the given rotation, and this synergy is a necessary condition for thread processing. Therefore, we must use the soft tapping head to control the range of error. Tapping, the soft tapping tap will produce radial head, limiting the improvement of the precision screw. These factors lead to lower processing rigidity and uniform load taps. Carbide tap depends on the successful application of the tool clamping stiffness and feed the control precision. For most of the processing methods, these processing conditions for granted. But tapping, these conditions just become a reality. In recent years, machine tool control technology continues to progress, has been able to achieve spindle rotation and feed the synchronization control, which can no longer use the soft tapping head. In addition, the use of heat-loading and hydraulic tool clamping chuck can improve the tool rigidity, radial run-out error than when using the soft tapping head sharply lower. The tool chuck concentricity of rotation in less than 3µm. Despite the large clamping force precision sleeve-type high-precision (TGHP) chuck performance and less on the hot-mounted hydraulic cutter chuck, but when applied to Tapping is very effective. Not all of the CNC machine tool can achieve "synchronization" tapping (the "rigid" tapping?? When the spindle rotation accuracy by the feed screw lead). Therefore, in order to allow a small amount of axial displacement to compensate for the inherent synchronization tapping machine small errors, the need for hot-mounted, hydraulic and telescopic TGHP tool chuck to improve. Industry standard tap the stems are less stringent tolerances (typically +0.0000 /-0.0381mm). The commercial's tap tapping head can be used in flexible, so the track jump control is not strict tolerance requirements. For example, according to industry standard, 1 / 2 "high-speed steel cone shank diameter and thread diameter jump error can be 0.04mm, and does not require direct control of the thread diameter and bevel cutting edge and tap shank concentricity, which Jump to allow the path error and the existence of the phenomenon of uneven loads. In fact, these measurements are relative to the tap manufacturing center during the clamp measurements. To explore the full effectiveness of cemented carbide tool materials, Kennametal has designed a machine to give full play to the high rigidity and high precision cutting tool chuck advantage of the new tap?? KC7542 grade solid carbide tap, this tap high-speed synchronous when tapping the cutting edge of high strength and wear resistance. And efficient as carbide drill and end mills, carbide taps is also a fully cylindrical shank to ensure concentricity and effective clamping (most of the tap head with four-cylinder with a handle). In addition, the tap's shank size of the tool shank and the other the same size, for example, 1/4-20 tap the shank carbide size and commonly used in drilling 1/4-20 thread bottom diameter of 5.1054 mm shank carbide drill bit the same size. In order to give full play to thermal loading, hydraulic or sophisticated tool chuck sleeve type TGHP advantage of this carbide tap the shank size accuracy of the German standard DIN 7160 for H6 level. Therefore, 1 / 2 "tap the shank tolerance is +0.0000 /-0.0101mm, 0.0030mm roundness tolerance maintained within. Why do not tap handle with a square head, because these tools when tapping chuck in , for the Department to meet the dimensional tolerances of the tap handle with sufficient clamping force. In addition, tap threaded part of the cutter body and cutting bevel and shank concentricity within the 10µm, can improve the uniformity of load tap bear. This kind of precision carbide cutting tools tap and when used with the chuck, you can track the composition of tap dancing can reduce the high rigid tool system that can meet the successful application of carbide taps of two conditions: high rigidity and load tap uniformity. In the past, when the newly introduced solid carbide drill hole processing, in order to reduce the load and the cutting edge to prevent chipping, users have to reduce the feed rate per revolution (compared with high-speed steel drill bit). However, carbide drill bits can be used for faster cutting speed. As the carbide drill bit design drilling grades and progress, the possibility of cutting edge chipping greatly reduced, so that the actual solid carbide drill feed rate rising. For the tap, the lead only by the thread, thread cutting edge bevel head count and to control the chip load, tapping it difficult to further reduce the role of environmental conditions on the load on the cutting edge tap. However, to avoid chipping, solid carbide drill bit design improvements (to get a higher feed rate) also can be applied to solid carbide taps. These improvements include a new tool grade KC7542, tap this brand will be developed specifically for high-strength carbide matrix and the newly developed nano-carbide drill combines TiAlN coating. Machine tools, control systems, tool chuck, carbide, and tap design improvement can be greatly expanded for efficient tapping of the workpiece material scope, including not only the short chip materials (such as aluminum and cast iron), the first time included long chip materials (such as carbon steel and alloy steel) (see table). Table: carbide tap processing of different materials recommended cutting speed range Workpiece material type? Material instance? Hardness? Cutting speed * (sfm) Low carbon steel (C 0.25%)? 1018? 220HB? 300 ~ 400 Cutting Steel? 12L14? 275HB? 250 ~ 350 Common medium / high carbon steel, tool steel? 1040,4340, H-13, D-2? 32HRC? 200 ~ 300 Ferrite steel, martensitic steel, PH steel? 430,410,17-4 PH? 32HRC? 150 ~ 210 Ductile iron, malleable cast iron? A-47, A-536? 300HB? 250 ~ 400 Grey cast iron? 20 ~ 50? 300HB? 250 ~ 400 (* In the table cutting speed applied to hole depth of less than 3 times the diameter of the through-hole tapping) In addition, to achieve synchronization tapping CNC machine tools fitted with a thermal, hydraulic, or precision clamping chuck sleeve type TGHP tapping tool, the new alloy can tap faster than high speed steel cone 5 times the speed of processing, which can greatly improve productivity tapping. However, in the tapping of blind holes to note that not all of the CNC numerical control machine tools have the same capacity of synchronous tapping. As the processing to the blind hole and tap the bottom and when the spindle to slow down and quit, tap reversal in the lead when errors may occur, causing the lateral thrust acting on the tap and cause thread detection dimensional tolerance. In addition, tap slow, reverse and re-acceleration is still joined together with the workpiece, therefore, blind hole tapping the speed should be higher than the recommended speed through-hole tapping about 40% lower. Kennametal gather some information on the processing of new data cemented carbide tap. For example, in a cutting experiment, the taps with M12 × 1.75 on the 4340 steel (hardness 32HRC) workpiece hole tapping. TiN coated high speed steel cone with 50sfm conventional tapping speeds can often be processed 1,500 holes; if the tapping speed to 300sfm, you can only process 158 holes. In the trial, carbide tap the tapping speed of processing to 300sfm 1,700 hole, the tap is almost no wear. In another process 4340 steel cutting experiments, high-speed steel cone to 50sfm the tapping speed of processing after the failure of 1,300 holes; and M6 × 1 of carbide taps can 300sfm the tapping speed of processing more than 6,000 holes. An automotive supplier with a new carbide machining A-536 ductile iron tap found that tapping speed increased from 110sfm to 400sfm, to enable tapping cycle time by 65%. As life expectancy increased to 40,000 tap holes, is a powder metallurgy (P / M) high-speed steel cone life 4 times, so considering the cost of processing cost and tool cases, the total tapping cost can be reduced 66%. Find another manufacturer, carbide taps can 300sfm the tapping speed of processing A-36 steel, which can shorten the processing time to 30 seconds to process 4 3/8-16 holes. In addition, a carbide tap usually takes 3-4 sticks to complete high-speed steel cone to complete the processing tasks. We are high quality suppliers, our products such as China LED Tunnel light , LED Spot Lamps Manufacturer for oversee buyer. To know more, please visits Flexible LED Strip Lights.
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