Application of CNC High Speed ​​Machining in Aviation Product Manufacturing

Xi'an Aviation Power Control Co., Ltd. (West Control Company) is a professional manufacturer of engine fuel control system products of China Aviation Industry Corporation. It also cooperates with world famous aircraft manufacturing companies Honeywell, Hansheng, Goodrich, Eaton, etc. The company has established a cooperative relationship and carried out the parts processing business of subcontract production. In the process of producing aero-engine products and aircraft parts, Xikong has undergone technological transformation due to the use of advanced processing equipment and technology, and introduced advanced processing equipment, so that the numerical control rate of the company's aviation manufacturing equipment is higher. The higher the efficiency, the high-efficiency, high-quality CNC machining is widely used in the company, which promotes the development of the company's production technology.

The application status of numerical control high-speed processing equipment in the product manufacturing of Xikong Company

In recent years, with the rapid development of the national economy and the national defense industry, the country's demand for aviation manufacturing equipment has also grown rapidly. In order to improve the manufacturing quality of aviation products and shorten the production cycle, AVIC West Control Company has increased investment in technological transformation, introduced advanced processing equipment, and equipped corresponding CNC tools. In the process of CNC high-speed machining, although related supporting technologies (such as tool technology and high-speed machining technology) have not been able to keep up with it in time, it is quite difficult to process some difficult-to-machine parts, but in the process of new product development and production. Also accumulated valuable experience. For example, the company adopts the curved cam processed by the high-speed five-axis linkage machining center machine. The surface of the cam part is a complex surface. The material is nitrided after heat treatment of 38CrMoAlA, and the surface hardness is HRC≥62. It is necessary to complete the production and ensure the processing of the part surface. Accuracy, the company's development technology experts, process personnel from the design of the cam profile, the preparation of the processing program, the determination of the process route, the control of the heat treatment deformation of the parts, the selection of CNC tools, the design and manufacture of abrasive tools, etc. After tackling the problem, the processing of the complex surface of the curved surface is finally realized. The success of the development and processing of curved cams represents the high-tech, high-level and high-quality production capacity of Xikong. At present, the company continues to carry out new challenges and breakthroughs in the processing of special-shaped parts for aero-engine fuel control regulators.

1 Xikong Company's demand for CNC high-speed machining in the manufacture of aviation products

The company's aviation products are divided into military products and subcontracting. The products are summarized as “high-precision”. First of all, in the structure, the company's aviation products use a large number of composite structural parts, as well as aluminum alloy, titanium alloy, stainless steel and high-temperature alloy materials. Secondly, in terms of process equipment, the metal-type aluminum alloy molds required for the development of high-performance aero-engine fuel control system components, the processing difficulty of colored, ferrous metal forging molds and forging steel molds are also increasing.

Traditional machining technology has been unable to effectively meet these needs, and the characteristics and advantages of high-speed machining technology provide a more effective solution for the processing of new structures, new materials and high-precision process equipment for aerospace products. High-speed machining with high spindle speed and high feed rate enables smooth machining and high precision. The surface quality of the machined workpiece can be almost comparable to the grinding process, achieving the effect of “milling and grinding”. Therefore, high-quality machining of shells, bushings, and profiled parts can be realized. For the slender, shaft and thin-walled parts with poor rigidity in aerospace products, it can be processed with high quality; for the processing of cavity surface on high-precision process equipment, the process of benching and trimming can be omitted and directly processed. Nitrided and quenched alloy steel curved cams and precision shutter bushing assemblies are also directly machined.

2 The core technology of CNC high speed machining

CNC high-speed machining technology, CNC high-speed cutting tool technology, CNC high-speed machining technology and CNC high-speed machining testing technology are the core of developing CNC high-speed machining technology, and the choice of CNC cutting tools directly affects high-speed machining equipment to achieve high efficiency and low cost. The basics. In the development of high-speed cutting, the development of machine tools and tools complements each other and promotes each other. In the cutting process system consisting of machine tools, tools and parts, the tool is the most active factor. The cutting performance of the tool depends on the material and tool structure of the tool, especially the productivity of high-speed machining, the service life of the tool, the processing cost, the machining accuracy and the quality of the machined surface. Reasonable choices depend on tool material and tool structure. Therefore, the choice of CNC tools is critical to the process of CNC high-speed machining.

Next page

Corrugated Aluminium  Coil