Inside screw cylindrical gear rotary cold extruding die

Abstract

The invention discloses an inside screw cylindrical gear rotary cold extruding die in the technical field of gear machining, which comprises an upper die structure and a lower die structure, wherein the upper die structure comprises a terrace die, a terrace die positioning ring, a terrace die fixing ring, a terrace die base, a terrace die upper padding plate, a thrusting bearing and an upper die base; and the lower die structure comprises a discharging plate, a cavity die, a cavity die positioning ring, a cavity die lower padding plate, a limit block, a mandril sleeve, a mandril and a lower die base. The inside screw cylindrical gear rotary cold extruding die is convenient for production and operation and is beneficial to cost saving; and the defects in the traditional mechanical cutting method and the traditional hobbing method are improved, and the production efficiency, the material utilization rate and the product accuracy can be improved simultaneously.

Description

technical field [0001] The invention relates to a device in the technical field of gear processing, in particular to a rotary cold extrusion die for internal helical cylindrical gears. Background technique [0002] Helical cylindrical gears have a wide range of uses and can be used for matching requirements of high-power electric tools and other transmission components. When the internal helical cylindrical gear structure is used in the transmission mechanism, its tooth shape meshing rate is more than twice that of ordinary spur gears, and it runs smoothly during work with low noise. At the same time, the helical cylindrical gear also has the characteristics of high output torque and low backlash. [0003] The existing processing methods of internal helical cylindrical gears are mainly mechanical cutting processing, such as turning processing or milling machine with internal milling head processing, which is difficult to process, high in cost, low in production efficiency, a...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the above-mentioned deficiencies in the prior art, and provides a rotary cold extrusion die for internal helical cylindrical gears. The cold extrusion forging method is applied to the production of internal helical cylindrical gears, which not only improves the existing mechanical cutting methods and gear hobbing methods In addition, it solves the problem of large forging force caused by general closed die forging, prolongs the life of the die, facilitates production operations, and is beneficial to cost savings. At the same time, it can improve production efficiency, material utilization and product accuracy.

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