工业机器人精密减速器输入轴的真空低压渗碳高压气淬工艺

doi:10.13251/j.issn.0254-6051.2022.05.029

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 177-182.DOI: 10.13251/j.issn.0254-6051.2022.05.029

工业机器人精密减速器输入轴的真空低压渗碳高压气淬工艺

殷和平¹, 徐跃明², 殷敏洁¹, 丛培武²

1.常州新区河海热处理工程有限公司, 江苏常州 213022;
2.北京机电研究所有限公司, 北京 100083

收稿日期:2022-02-01 修回日期:2022-04-01 出版日期:2022-05-25 发布日期:2022-06-16
通讯作者: 殷敏洁,工程师,E-mail: reica1117@aliyun.com
作者简介:殷和平(1966—),男,正高级工程师,主要研究方向为工业机器人精密齿轮真空低压渗碳和高压气淬工艺,E-mail: 13706126315@139.com。
基金资助:
国家重点研发计划(2018YFB2001904)

Vacuum low pressure carburizing and high pressure gas quenching process of pinion shaft of precision reducer for industrial robot

Yin Heping¹, Xu Yueming², Yin Minjie¹, Cong Peiwu²

1. Changzhou New District Hehai Heat Treatment Engineering Co., Ltd., Changzhou Jiangsu 213022, China;
2. Beijing Research Institute of Mechanical & Electrical Technology Ltd., Beijing 100083, China

Received:2022-02-01 Revised:2022-04-01 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 针对轴齿类零件高温渗碳淬火热处理畸变问题,研究了工业机器人减速器精密轴齿类零件真空低压渗碳和高压气淬工艺。结果表明,在升温阶段采用阶梯式升温保温方式,强渗阶段以乙炔-氮气交替脉冲进行强渗和扩散,淬火冷却阶段精确控制氮气压力1.8 MPa(18 bar)并使之稳定,可使轴齿类零件的总畸变量控制在0.005~0.015 mm。实际生产结果表明,轴齿类零件采用真空低压渗碳和高压气淬技术,渗碳层中的马氏体为1级,残留奥氏体和碳化物为1~2级,心部组织为1~2级。批量生产的减速器精密轴齿表面硬度、心部硬度和有效硬化层深度均值分别为59.7 HRC、38.6 HRC和0.681 mm,全部满足技术要求。

关键词: 精密减速器输入轴, 真空低压渗碳, 高压气淬

Abstract: Aiming at the distortion problem of pinion shaft of industrial robot planetary reducers during high-temperature carburizing and quenching, the vacuum low pressure carburizing and high pressure gas quenching processes of the precision shaft were studied. The results show that in the heating-up stage, the multi-step heating up method is adopted, the boost stage is used to carry out strong carbon infiltration and diffusion with the alternately pulsed input of acetylene-nitrogen, and the quenching cooling stage with accurately controlled and stabilized the nitrogen pressure at 1.8 MPa (18 bar), the total distortion of the pinion shaft can be controlled within 0.005-0.015 mm. The actual production results show that, by using vacuum low pressure carburizing and high pressure gas quenching technology, the martensitic grade of the pinion shaft in the carburized layer is grade 1, and the retained austenite and carbide are grade 1 to 2, the core microstructure is 1 to 2 grades, and the average surface hardness, core hardness and effective hardened depth of the precision pinion shaft produced by the mass production are 59.7 HRC, 38.6 HRC and 0.681 mm, respectively, all of which meet the technical requirements.

Key words: precision reducer pinion shaft, vacuum low pressure carburizing, high pressure gas quenching

中图分类号:

TG156.9

殷和平, 徐跃明, 殷敏洁, 丛培武. 工业机器人精密减速器输入轴的真空低压渗碳高压气淬工艺[J]. 金属热处理, 2022, 47(5): 177-182.

Yin Heping, Xu Yueming, Yin Minjie, Cong Peiwu. Vacuum low pressure carburizing and high pressure gas quenching process of pinion shaft of precision reducer for industrial robot[J]. Heat Treatment of Metals, 2022, 47(5): 177-182.

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工业机器人精密减速器输入轴的真空低压渗碳高压气淬工艺

Vacuum low pressure carburizing and high pressure gas quenching process of pinion shaft of precision reducer for industrial robot

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