Beijing II Machine Tool "Effective Grinding Processing Key Technologies and Complete Equipment" Passes Identification

Recently, the second Beijing Machine Tool Group's "Crankshaft Flexible, Precise, and Efficient Grinding Key Technologies and Complete Equipment" project appraisal meeting organized by the China Opportunity Technology Achievement Awards Office was held at the production site of Zhejiang Sun Co., Ltd. Academic experts Tan Jianrong, Wang Liming and many other industry experts attended the meeting. Wang Rongqing, the chairman of the customer's company, and Liu Bojun, the general manager of the company, also attended the meeting.

The “Crankshaft Flexible, Precision, and High-Efficiency Grinding Key Technologies and Complete Equipment” developed by Beijing No.2 Machine Tool Co., Ltd. has been operating on the production site of Zhejiang Sun Co., Ltd. for more than nine months. The thrust surface, main journal and connecting rod neck have been realized. , flange end face, belt end face, journal polishing, thrust surface polishing complete sets of technical equipment applications. The equipment is in good condition and is highly valued by users.

The most critical core technology and equipment "digital control follow-up (point-tracking) double-grinding crankshaft grinder" achieved a technological breakthrough. The expert team spot-checked three on-site grinding crankshafts for the four-cylinder gasoline engine of the A12 Beiqi sedan used in on-site testing and sent it to the measurement room for on-site inspection. The actual measured values ​​of all items met the technical requirements, and they were also associated with the internationally renowned CNC follow-up ( Point-of-Clension Tracking) The crankshaft grinding machine manufacturer Landis' crankshaft-like test report compares the machine tool processing. The machining efficiency and the measured values ​​of various inspection items are comparable to the crankshafts machined by Landis, and the individual indicators are better than Landis's indicators. For example, the phase tolerance of each journal is the index. Since the Beiji machine adopts dual drive, the test result is obviously better than that of Landis machine tool.

The equipment adopts domestic grinding wheel, coolant and dresser to achieve the same processing effect as imported machine tools, saving users' operating costs. However, imported CNC systems (Fanaco) and online measurement systems (Mappers) are still available.

After examining the on-site use situation, the appraisal expert group unanimously held that the comprehensive technology of this achievement has reached the international advanced level of similar technology, in which follow-up (cut-point tracking) grinding machine tool has reached the international advanced level of similar products. For promoting the development of technologies and industries in China's automobile engines and other related fields, it has provided strong technical and equipment support and achieved remarkable economic and social benefits.