Extrusion type distressing method and device for finished worm

Abstract

The invention relates to an extrusion type distressing method for a finished worm. The method comprises the following steps that S10, the worm is placed on an extrusion station, and an extrusion pieceis aligned to a tooth groove in the worm; S20, a driving device enables the worm and the extrusion piece to be close to each other and implements extrusion; S30, in the extrusion state, the extrusionpiece rotates and drives the worm to rotate, and the extrusion piece moves along the tooth groove in the worm; and S40, after extrusion is finished, the driving device returns. The invention furtherrelates to a destressing device, wherein a lower plate can be driven by a hydraulic device to move up and down along guide columns; a base assembly is arranged on the lower plate, and a worm placing assembly for placing the worm is arranged on the base assembly; and the extrusion piece is fixed to the lower surface of an upper plate and driven by a motor to rotate. According to the extrusion typedestressing method for the finished worm provided by the invention, operation is facilitated, and damage to the worm is small. Meanwhile, according to the extrusion type distressing device for the finished worm further provided by the invention, the worm distressing operation can be conveniently implemented.

Description

technical field [0001] The invention belongs to the field of worm processing equipment, and in particular relates to a squeeze-type stress relief method and device for finished worms. Background technique [0002] A worm refers to a gear that has one or several helical teeth and meshes with a worm gear to form a cross-axis gear pair. The indexing surface can be a cylindrical surface, a conical surface or a toroidal surface. The worm is widely used in the field of industrial manufacturing. [0003] During the manufacturing process of the worm, due to the characteristics of the metal product itself, stress concentration points are easily generated in the worm. In the later use process, the existence of these stress concentration points will lead to a decrease in the strength of the worm, and cracks, fractures, etc. are prone to occur, seriously affect the use of the product. [0004] In the prior art, there are some conventional methods for eliminating residual stress: (1) St...

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Problems solved by technology

[0003] During the manufacturing process of the worm, due to the characteristics of the metal product itself, stress concentration points are easily generated in the worm. In the later use process, the existence of these stress concentration points will lead to a decrease in the strength of the worm, and cracks, fractures, etc. are prone to occur, seriously Affect product use

[0004] In the prior art, there are some conventional methods for eliminating residual stress: (1) Stress is naturally invalidated after placement, but it takes a long time; (2) Stress is invalidated by heating, and 70%-80% of residual stress can be eliminated in actual production , but there are shortcomings such as workpiece surface oxidation, hardness and mechanical performance decline; (3) Vibration makes the stress invalid, and under the action of machinery, the component produces local collision deformation, so that the residual stress is released; (4) Ultrasonic makes the stress failure, mostly used in ships, nuclear submarines, aerospace and other fields

[0005] The above conventional stress relief methods have disadvantages such as time-consuming, large damage to the workpiece, and the surface of the workpiece will be bumped, which seriously affects the production efficiency or the product quality of the workpiece.

In addition, the applicant found in the production and sales process of the worm: after the delivery of the finished worm, the customer found that the shaft of the worm was brittle and easy to break during the assembly process, because there was still residual stress on the finished worm

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