Heat treatment technology for reducing deformation of spiral bevel gear for industrial robot

Abstract

The invention discloses a heat treatment technology for reducing deformation of a spiral bevel gear for an industrial robot and belongs to the field of heat treatment technology. The technology comprises the following steps: 1) preparation of a spiral bevel gear part; 2) crating; 3) front cleaning; 4) carburizing and quenching: temperature equilibrium at 740 + / - 5 DEG C for 20 + / - 1 min, and carbon potential is 0.50 + / - 0.025%; temperature equilibrium at 850 + / - 5 DEG C for 20 + / - 1 min, and carbon potential is 0.65 + / - 0.025%; intensive carburizing at 915+ / - 5 DEG C for 180 + / - 1 min, and carbon potential is 1.0 + / - 0.025%; diffusion at 880 + / - 5 DEG C for 90 + / - 1 min, and carbon potential is 0.90 + / - 0.025%; quenching and temperature equilibrium at 830 + / - 5 DEG C for 30 + / - 1 min, and carbon potential is 0.65 + / - 0.025%; and cooling in 110 + / - 5 DEG C of quenching oil; 5) post cleaning; and 6) tempering. According to the invention, deformation of the spiral bevel gear after heat treatment is reduced, and first pass yield for heat treatment can reach 100%.

Description

technical field [0001] The present invention relates to a heat treatment process, more specifically, to a heat treatment process for reducing the deformation of a spiral bevel gear used in an industrial robot, the spiral bevel gear being mainly used in a robot wrist reducer. Background technique [0002] figure 1 It is a structural schematic diagram of a spiral bevel gear for industrial robots, which is mainly used in the wrist reducer of industrial robots. The industrial robot wrist reducer is the part connecting the hand and the arm. Its main function is to change the spatial direction of the hand and transfer the operating load to the arm. figure 1 The spiral bevel gear shown is an important part in the reducer system of the robot wrist. The working conditions are complex, and it is required to have excellent wear resistance, high resistance to contact fatigue and bending fatigue. These properties need to be achieved through heat treatment. . At present, for the heat t...

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Problems solved by technology

This application uses isothermal normalizing to have a more uniform structure and performance, which reduces quenching distortion to a certain extent; however, this application only changes ordinary normalizing preheating to isothermal normalizing in the heat treatment process, which simplifies However, it cannot guarantee the consistent performance of the product after one heat treatment, and there are still problems of large deformation and low yield after heat treatment.

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