Ingenious ＂Intelligent＂ China Good Machine Tool —— A Record of Ma Jianjun, a Worker Technician of Baoji Machine Tool Group

　　"This bearing requirements are high. Look at the drawings, the design error here is only allowed to be 0.02 mm, so pay special attention. " At 8: 30 in the morning, Ma Jianjun exchanged technical research points with his disciples. Ma Jianjun is a key member of the machine tool performance laboratory of Baoji Machine Tool Group Co., Ltd. in Baoji High-tech Zone, Shaanxi Province. He has participated in the development and trial production of key new products and more than 30 major national special tasks, achieved more than 20 technological innovations, and successfully completed more than 50 major special machine tool commissioning, debugging and after-sales service tasks.

　　Ma Jianjun graduated from Baoji Technical School. In July 1994, he came to the machining workshop of Baoji Machine Tool Factory and became an ordinary lathe operator. With only a degree of Chinese technical education, he suddenly felt unprecedented pressure in the face of high-precision processing equipment.

　　"I just want to learn the technology well, study with the master during the day and go home for self-study at night." Technology, programming, electricity and cutting tools are the keys to the machining technology of CNC machine tools. Ma Jianjun uses his good foundation in turning technology to learn by doing and learn by doing. When he meets problems he doesn’t understand, he asks the master and inspectors, and takes time to check the information and take notes at night. After a few years, he wrote down more than 10 study notes and applied them to well-known CNC systems freely. Ma Jianjun once won the title of "Excellent Player" in the "Qinchuan Cup" first skill competition for employees of state-owned enterprises in Shaanxi Province, and participated in many national, provincial and municipal vocational skills competitions as a referee or technical director. Since 2010, he has been awarded the "lathe technology demonstration post" by the group company, and in 2015, he became the backbone member of Tian Haorong’s national skill master (model worker innovation) studio.

　　In 2012, during his four-month equipment technical service for a company in Wuxi, he overcame difficulties, fulfilled his duties dutifully, and successfully completed the assignment abroad. In recent years, the company has successively ordered more than 100 machine tools from the company.

　　In 2015, the key contract delivery of a company in Chongqing was just around the corner. Due to the tight time and high technical requirements, the company leaders are very anxious. Ma Jianjun took the initiative to take this "hard bone." He "nailed" the user’s trial production site for more than ten hours in a row, worked overtime to carefully study and ponder over each equipment, compiled the processing route program diagram, made corresponding fixtures and configured appropriate tools, and finally completed the dispatching and commissioning tasks of 14 CNC machine tools.

　　Since 2014, Ma Jianjun has participated in a number of major national R&D and trial-production tasks for high-end CNC machine tools. Especially during the national major special research project and working in the machine tool performance laboratory, he was processing BTGS12 spindle, pull rod and ON— When processing parts with high precision coefficient and small tolerance range, such as rollers and D-rings in 3VII, with superb business skills, the processed parts exceeded the precision required by the drawing process and successfully completed the production task.

　　In addition, Ma Jianjun cooperated with the research group to overcome a number of technical difficulties and broke through a large number of key processing technologies of CNC machine tools. In undertaking the R&D and production of BM63150C precision CNC lathe project, he boldly innovated, optimized the oil return structure at the back end of the machine tool spindle, and eliminated the weak links that affected the reliability of the machine tool; Through numerous groping, adjusting cutting parameters and workpiece clamping methods, the hard turning process test was finally completed, and the product won the "Chun Yan Prize" in cmtba. He also successfully solved the key new product BMC— The technical problem of machining the parts of the clamping sleeve in the center of 500TV five-axis compound milling machine makes the company’s first five-axis CNC machine tool enter the high-end market.

　　Ma Jianjun has more than two suggestions for minor reform and process improvement every year, and has completed more than 30 key technical projects with studio members. In 2016, his studio passed the acceptance of the national skill master studio, and won the award of "All-China Workers’ Innovation Studio Key Project Fund". Advanced practices and experiences were promoted and exchanged in Shaanxi Province, realizing the transition from ordinary operating workers to knowledge workers, and then growing into expert talents in the new era. (Economic Daily reporter Lei Ting)