Error identification and verification of cycloid gear profile surfaces in precision forming grinding

ABSTRACT

This paper presents an error identification method for directly related geometric errors of 4-axis forming grinding machine tool and some processing-induced errors from actual teeth profiles of a machined cycloid gear. Based on the developed 4-axis geometric error model, we build up an overall error model of cycloid gear-tooth profiles by forming grinding, which includes some directly related geometric errors of the machine tool and processing-induced errors. Error separation or identification methods are developed in correspondence with the form grinding process and are verified by some non-cutting identification or measurement techniques, including multi-lateration laser measurement technique and a laser rotary axis calibrator. The experiment results demonstrate that the separated geometric errors based on the machining test approach reach a better accuracy. In order to further improve the machining accuracy of the cycloid gear, two identified geometric errors and tooth-shaped error can be utilised for error compensation in the future.

KEYWORDS:

• Forming grinding machine tools
• cycloid gear
• error identification
• geometric errors

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Science & Technology Program of Guangzhou [201604010100]; Natural Science Foundation of Guangdong Province [2016A 030313481]; the National Natural Science Foundation of China [U1501247, 91223201].

Notes on contributors

Zhong Chen

Zhong Chen, Professor, was born in Chengdu, Sichuan, China in 1968. He received a B.Eng. degree from Chengdu University of Science and Technology in 1990, a M.Sc. degree from South China University of Technology in 1996, and a Ph.D. degree from South China University of Technology in 2003. He worked temporarily in Sichuan Chemical factory between 1993 and 1996. From AUG. 15, 2015 to AUG. 14, 2016, he conducted some collaborated researches as a visiting scholar in division of microrobotics and control engineering in Oldenburg University, Germany. He has been holding a deuty director in Guangdong provincial key laboratory of precision equipment and manufacturing technology since 2003, and has been taking parts in a research team led by professor Xianmin Zhang. His research areas cover precision measurement and testing, dynamics of compliant mechanisms, and machine vision and its application.

Wenjie Li

Wenjie Li, was born in Ganzhou, Jiangxi, China in 1994. He received a B.Eng. degree at Nanhua University, and is studying for M.Sc. degree at South China University of Technology now. His research interests include precision measurement and error identifaction in machine tools.

Xianmin Zhang

Xianmin Zhang, Professor, was born in Zhuozhou, Hebei, China in 1964. He received a Ph.D. degree from Beijing University of Aeronautics and Astronautics in 1993. Since 2003, he worked in South China University of Technology as Professor, and hold the post of dean of School of Mechanical and Automotive Engineering, South China University of Technology in 2013. His research areas cover mechanism design and dynamics, as well as inspection technique.

Longxuan Wang

Longxuan Wang, Deputy General Manager, was born in Sichuan, China in 1970. He worked at Guangzhou Minjia Manufacturing Technology, Co. LTD, in 2007.

Yuanyuan Li

Yuanyuan Li, Deputy General Manager, was born in Hubei, China in 1984. She received a B.Eng. degree from Hubei University of Technology in 2007. She worked at Guangzhou Minjia Manufacturing Technology, Co. LTD, in July, 2007. She had taken part in many R&D projects on various machine tools, including internal thread grinding machine in 2009, sideway grinding machine in 2010, vertical grinding machine in 2011, machining center and grinding machine for arc-shape cams in 2012, form grinding machine for cycloid gears in 2014.

Junpeng Dang

Junpeng Dang, General Manager Assistant, was born in Shanxi, China in 1985, He received a B.Eng. degree from Hunan Institute of Engineering in 2007. He worked at Guangzhou Minjia Manufacturing Technology, Co. LTD, in April, 2012. He had taken part in many R&D projects on multiple machine tools, including 5-axis turn-milling machine tool in 2013, form grinding machine for cycloid gears in 2014.