On September 23, 2024, the China Machine Tool Industry Association hosted a product appraisal meeting for the “Five-axis CNC horizontal side broaching machine for mortise and tenon processing of aircraft engines, etc.” developed by Zhejiang Changer Intelligent Equipment Co., Ltd. in Jinyun County, Zhejiang Province.
This conference invites Guo Dongming, academician of the Chinese Academy of Engineering and former president of Dalian University of Technology, Liu Bingye, former director of Beijing Machine Tool Research Institute Co., Ltd., Professor Tong Shuiguang of Zhejiang University, Professor Liu Zenghua of Beijing University of Technology, and Chen Hu, general manager of Code CNC Co., Ltd., Shanghai Wang Yu, deputy general manager of the Machine Tool Factory Co., Ltd., Li Xilong, chief process engineer of China Shipbuilding Industry Corporation Longjiang Guanghan Gas Turbine Co., Ltd., Liu Jian, senior chief engineer of China Aviation Development Shenyang Liming Engine Co., Ltd., and other 17 experts formed the appraisal committee, headed by Academician Guo Dongming. The chairman committee member evaluated the innovation, technological advancement and industrialization capabilities of Changer’s “five-axis CNC horizontal side broaching machine for tongue and groove machining of aircraft engines and other applications”. Lin Lugao, chairman of Zhejiang Changer Company, Hu Chunmei, executive deputy general manager, Liu Zhonghua, chief engineer, as well as user representatives such as Xihang Wright Company and Wuxi Hangya Company also attended the meeting and participated in the discussion. The appraisal meeting was chaired by Mu Donghui, deputy secretary-general of the association and director of the Industry Development Department. He first introduced the original intention and working principles of the association’s product identification work to the experts and participants, saying that the association has always supported member companies in independent innovation and market development. The association’s product identification work focuses on original innovation and the transformation of scientific and technological achievements, through product identification and other activities Discover excellent products of industry enterprises, build excellent brands in the industry, and promote high-quality development of the industry.
Dr. Zhang Shunqi from Changer Postdoctoral Workstation gave the experts a detailed report on the background, main research contents, technical innovations, intellectual property status, user application effects, etc. of the project “Five-axis CNC horizontal side broaching machine for mortise and tenon processing of aircraft engines, etc.”
The turbine disc is a key core component of an aircraft engine. The efficient and precise broaching of the wheel disc tenon is one of the world-recognized technical problems in the aviation manufacturing industry, and it is also a “neck-blocking” problem that restricts the development of my country’s aviation manufacturing industry. Zhejiang Changer Company has developed a five-axis CNC horizontal side broaching machine with completely independent intellectual property rights by studying the efficient and precise broaching process of the tenon, the precise rotary indexing positioning and clamping technology of the tenon broaching position, the efficient and precise replacement and clamping technology of the tenon broaching tool box, and the intelligent broaching control system based on “Industrial Internet of Things + Artificial Intelligence”, etc., aiming at the complex spatial shape of the turbine disc tenon of aircraft engines, difficult material cutting, and high precision indexing of parts rotary processing. It has obtained 7 authorized invention patents and 20 utility model patents. The machine tool has a rated pulling force of 250kN, a broaching dimensional accuracy of IT5, and a broaching surface roughness of Ra≤0.8µm, which can realize flexible, efficient, and high-precision processing of the wheel tenon of aircraft engines, gas turbines, etc. The experts at the meeting listened to the product development technology summary report and user application description made by Zhejiang Changer Company, and learned that its newly developed five-axis CNC horizontal side broaching machine has been used by users for more than a year, working continuously 24 hours a day, with high machining precision and good stability, and the processed parts meet the user’s requirements. The appraisal expert committee reviewed the relevant appraisal materials, inspected Changer’s production site and five-axis CNC horizontal side broaching machine products, and reached a consensus on the appraisal opinion after questioning and discussion: the “five-axis CNC horizontal side broaching machine for tenon and groove processing of aircraft engines, etc.” developed by Zhejiang Changer Intelligent Equipment Co., Ltd. has independent intellectual property rights, can realize efficient and precise automated broaching of tenons and grooves, and has been promoted and applied in the field of aeroengines. The overall technical level of the product has reached the international advanced level.
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