A gear mold helical tooth processing technology

Abstract

The invention discloses an oblique tooth machining process for a gear mold. The oblique tooth machining process includes the following steps that firstly, a circular workpiece made of an S136 steel material is prepared; secondly, rough machining is conducted on a lathe, wherein the margin being 0.10 mm is reserved on a single side; thirdly, a straight position and an exhaust hole are machined on a milling machine; fourthly, thermal treatment is conducted on the workpiece; fifthly, detection is conducted till the hardness of the workpiece reaches HRC50-52 DEG C; sixthly, machining is conducted through a surface grinding machine and an inner and outer circle grinding machine so that all sizes of the workpiece can meet requirements; seventhly, an exhaust groove in the PL plane is machined through CNC; eighthly, oblique teeth are machined through a special electrode by means of an EMD machine table according to the oblique tooth form parameters of products; and ninthly, exhaust grooves in the glue positions of the workpiece are machined through the surface grinding machine. In the oblique tooth machining process for the gear mold, the hardness of the thermal treatment of the workpiece is strictly controlled, the hardness is large after gear machining is completed, the surface of the workpiece is smooth, actuation of the mold is smooth, the forming condition is stable during production, the product precision is constant, and the mass productivity is high.

Description

technical field [0001] The invention relates to the technical field of gear helical tooth processing, in particular to a gear mold helical tooth processing technology. Background technique [0002] With the development of the chemical industry, various new polymer materials have come out, providing raw materials for manufacturing parts to various industrial manufacturing fields. Plastic products have gradually replaced expensive alloy materials in aerospace, aviation, electronics, machinery, ships, automobiles, office supplies and other fields due to their excellent properties such as light weight, high strength, low operating noise, and good self-lubricating performance. Plastic gears are mainly molded by injection molding in the production process. The internal tooth pattern processing of existing molds is mainly processed by wire cutting or EDM machines. Although wire cutting can achieve high processing accuracy, it is only suitable for direct Helical gear processing wit...

AI Technical Summary

Problems solved by technology

Plastic gears are mainly molded by injection molding in the production process. The internal tooth pattern processing of existing molds is mainly processed by wire cutting or EDM machines. Although wire cutting can achieve high processing accuracy, it is only suitable for direct Helical gear processing with single tooth or tooth shape, small slope and small pressure angle is not suitable for processing helical gear molds and worm molds with large slope and large pressure angle. When the pressure angle of helical teeth is large The tooth-shaped surface is a complex 3D curved surface, and EDM processing is the only processing method; when using EDM machines, the workpiece is usually only soaked in spark oil for processing, and the metal impurities generated during processing will float in the spark oil. It is easy to cause damage to the workpiece and affect the processing quality of the work

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