Vacuum glow ion nitriding process for reducing deformation of precision gears of industrial robots

A technology of glow ion permeation and industrial robots, which is applied in the field of nitriding technology, can solve the problems of high heat treatment technology requirements and difficulty in meeting the nitriding treatment requirements of such parts, and achieve shortened nitriding time, good comprehensive mechanical properties, heating uniform effect

Active Publication Date: 2019-07-26
常州新区河海热处理工程有限公司
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Problems solved by technology

However, due to the high technical requirements for the heat treatment of the above-mentioned gear parts 1, the existing ion nitriding process is difficult to meet the nitriding treatment requirements of such parts

Method used

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  • Vacuum glow ion nitriding process for reducing deformation of precision gears of industrial robots
  • Vacuum glow ion nitriding process for reducing deformation of precision gears of industrial robots
  • Vacuum glow ion nitriding process for reducing deformation of precision gears of industrial robots

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Embodiment

[0046] Taking the nitriding treatment process of an industrial robot precision gear with a modulus of 0.5 and a number of teeth of 97 as an example, the heat treatment technical requirements are: surface hardness ≥ 700HV, effective hardened layer depth of 0.15-0.26mm (limit value 400HV, PCD ( pitch circle diameter) position), the gear accuracy is JIS1~3 (the gear accuracy before heat treatment is 1~1.5), and the plane parallelism tolerance is ±0.012mm (the plane parallelism tolerance before heat treatment is ±0.007mm). In order to meet the above heat treatment requirements, such as Figure 5As shown, a vacuum glow ion nitriding process for reducing the deformation of precision gears of industrial robots in this embodiment includes the following steps:

[0047] (1) Parts preparation: Quenching and tempering the gear blank so that the hardness of the blank reaches 31-32.5HRC. After quenching and tempering, good comprehensive mechanical properties can be obtained, which can effec...

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Abstract

The invention discloses a vacuum glow ion nitriding process capable of reducing industrial robot precision gear deformation. The vacuum glow ion nitriding process capable of reducing industrial robot precision gear deformation belongs to the technical field of heat treatment, and comprises the steps of (1) preparing parts: hardening and tempering gear parts blanks, and enabling the hardness of the gear parts blanks to achieve 31 to 32.5 HRC; (2) pre-cleaning: cleaning the gear parts; (3) clamping the parts: adopting a fixture tool to clamp the gear parts to be gear assembling units; (4) charging: uniformly and circularly arranging the gear assembling units on a cathode disc in a sealing way, and covering with a furnace hood; (5) nitriding: adopting a step raising and holding temperature manner to heat the gear parts to be at the nitriding temperature, and controlling the time for rising the temperature from the room temperature to the nitriding temperature to be 3.5 to 4 hours; and (6) furnace cooling: blowing in when the temperature in the furnace is less than or equal to 95 DEG C. According to the vacuum glow ion nitriding process capable of reducing industrial robot precision gear deformation provided by the invention, the deformation after precision gear nitriding processing is effectively reduced, the heat treatment technology requirement of the gear is met, and the qualification rate of one-time heat treatment achieves 100 percent.

Description

technical field [0001] The invention relates to a nitriding process, in particular to a vacuum glow ion nitriding process for reducing deformation of precision gears of industrial robots. Background technique [0002] figure 1 with figure 2 It is a schematic diagram of gear parts used in the waist reducer of industrial robots. The waist reducer of industrial robots is the part that connects the base and the body, and mainly plays a role in rotating motion. The gear part 1 is an important part in the waist reducer of an industrial robot, and the working conditions are complex, requiring excellent wear resistance, high resistance to contact fatigue and bending fatigue performance. For the gear part 1, the current conventional process is to use gas nitriding treatment, but the conventional process has defects such as large deformation of the gear tooth after treatment, uneven permeation layer, long treatment time, etc., and the yield after heat treatment is only about 45%. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/38C21D1/25
CPCC21D1/25C23C8/38
Inventor 殷和平殷敏洁
Owner 常州新区河海热处理工程有限公司
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