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.
2013年8月22日星期四
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.
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