Experts from the Industrial Development Promotion Center of the Ministry of Industry and Information Technology in Beijing accepted the task of "upgrade of high-speed precision CNC machine tool bearing series products and research and development of key industrialization technologies" which was led by Luoyang Bearing Research Institute Co., Ltd. (Luoyang Shaft Research Technology Co., Ltd.). Thirty experts, responsible units, participating units and members of the Industrial Development Promotion Center of the Ministry of Industry and Information Technology attended the meeting. The chairman of the expert group of the project acceptance meeting was Deputy Secretary-General Li Dongru of the China Machinery Industry Federation.
At the meeting, the responsible units of the project and the participating units made self-evaluation reports according to the relevant work requirements of the State Administration Measures for Acceptance and Acceptance of Major Scientific and Technological Projects (Minkou). The user units of Shenyang Machine Tool (Group) Co., Ltd. and Dalian Huagen Machinery Co., Ltd. introduced the products provided by the research and development units of the project. Demonstration and application of product loader.
The subject aims at the high-grade CNC machine tool series precision bearing, through the mechanism analysis, the optimization design, the industrialization manufacture, the test inspection, the service performance and so on thorough research, has realized based on the all-steel bearing hybrid ceramic ball bearing series design and the bearing overall precision precise control, has mastered the precision bearing raceway in. Line detection technology and serialization test technology, and developed related instruments and test equipment.
Ten kinds of precision bearings used in high-grade CNC machine tools, such as spindle of typical CNC lathe, spindle of high-speed precision CNC grinding machine, spindle of high-speed turning and milling machining center, turntable of high-grade CNC machine tool, ball screw support, high-speed motorized spindle, etc., have been developed. The 10000-hour reliability life test of typical bearings has been completed and the high-precision bearing has been developed. The vibration acceleration of close angle contact ball bearing reaches Z3 level with rotation accuracy up to P4 level, in which the high speed performance coefficient of right lubrication angular contact ball bearing for ultra-high speed motorized spindle is dmn=3.19 x 106 mm?R/min (oil-gas lubrication); the products are in Qizhong CNC Equipment Co., Ltd., Shenyang Machine Tool Group Co., Ltd., Dalian Huagen Machine Machinery Co., Ltd., Wuhan High-tech Machinery Equipment Manufacturing Co., Ltd., Wuhan Heavy Machine Tool Group Co., Ltd. and other users of the main engine carried out application verification. The accumulative working time of the bearing exceeded 1000 hours, running smoothly, with low heating and low noise, and reached the assessment target stipulated in the task contract. The bearings H7008C-2RZ/P4, 7020TN1/P4 and 81256M/P4 developed by the subject are applied to the high-end CNC machine hosts such as high-speed vertical machining center TD500A, precision milling and boring machine center MDH200F, VDF850A, CNC heavy-duty horizontal lathe HT III 450 *110/80, and so on, respectively, realizing the domestic substitution.

<>High speed precision CNC machine tool bearing series upgrade

 

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