An effective means to solve manufacturing problems: EDM forming tool

Abstract: Through the research of five-axis linkage precision digital electro-discharge machining technology and equipment project, many key technologies of five-axis linkage precision digital electro-discharge machining technology and equipment have been overcome. The latest AP30 and A35 oil tank lifting precision are introduced. CNC EDM machine tool and AA50 five-axis linkage precision CNC EDM machine tool can realize the special requirements of five-axis five-link machining of aerospace and aerospace complex parts, and is an indispensable equipment for realizing automation and improving machining efficiency.

Deputy Chief Engineer of Beijing Electric Processing Research Institute Fu Jinjuan

Along with the development of China's aerospace military energy industry, the application of difficult-to-machine materials and complex profile parts is becoming more and more extensive. These parts have high strength, high temperature resistance, corrosion resistance, can adapt to harsh working conditions and significantly improve the performance of the whole machine. They are the most critical components of the power unit, but the materials of these parts are highly viscous, high in hardness, and the space shape is extremely complicated. Processing is difficult and has become a "bottleneck" in manufacturing. EDM is a non-contact machining, especially suitable for the processing of high melting point, high toughness, hard and brittle materials that are difficult for traditional machining. Five-axis CNC machining can complete very complex space trajectory movements. Solve tool placement and interference problems in complex surface machining. Therefore, the five-axis linkage digital electric discharge machining that combines the advantages of both has been recognized as the best solution for the manufacture of difficult-to-machine materials and complex curved parts at home and abroad.

Beijing Electric Processing Research Institute is a high-tech enterprise integrating scientific research, development and production. In the past 40 years, the company has always been guided by the principle of “dedicated to serve the country” and the main direction of “one special and two fines”. It insists on reform and innovation, and has formed a professional technical team that is realistic, innovative and efficient, and has formed a certain scale. "One special two fine (one special: special processing technology for special materials, two fine: the manufacture of precision CNC electric processing machine tools and precision tooling)" high-tech industry. He has undertaken a number of special research projects in the special processing field, such as the National Science and Technology Major Project, the 863 Program Key Project, the National Natural Science Foundation Project and the Beijing Natural Science Fund Project. It has become a leader in the special processing industry and has become a new force in national economic construction. .

The holding company-Beijing Dimeng CNC Technology Co., Ltd. is a professional enterprise engaged in the research, development and production of precision CNC EDM machine tools. Based on the strong scientific research and talents, the company continues to develop with the spirit of innovation and continuous pursuit of excellence. The series of precision CNC EDM machine tools with completely independent intellectual property rights has become one of the major manufacturers of precision CNC EDM machines. The company relies on the strategy of “innovative technology, manufacturing quality, craft first, and good service”. It develops special equipment and provides system for EDM processing for special processes and parts requirements of aerospace, military energy, automotive molds and other industries. The process solution has been well received by users.

Under the support of the National Science and Technology Major Project and the 863 Program, combined with the country's major needs, the research on the five-axis linkage precision CNC EDM technology and equipment project was carried out, and many of the five-axis linkage precision CNC EDM technology and equipment were overcome. Key technology, independently developed a series of five-axis linkage precision CNC EDM machine tools. At the 13th China International Machine Tool Exhibition held on June 22, 2016, AP30 and A35 oil tank lifts were launched. The precision numerical control EDM machine tool, the lifting oil tank structure is more convenient to realize the automatic disassembly and assembly of the workpiece, the alignment and adjustment of the workpiece, and is an indispensable equipment for realizing automation and improving processing efficiency.

1. A35 oil tank lifting precision CNC EDM machine

The A35 oil tank lifting precision CNC EDM machine (see Figure 1) is famous for its high precision, low surface roughness (mirror surface), low loss, large range of processing materials, automatic lifting oil tank, and automatic programming. Not only can the processing of general molds be excellent, but also the processing of superhard materials, titanium alloys, heat-resistant alloy materials and shaped cavities, low surface roughness values, deep narrow slits and other parts can be perfectly processed. To achieve the level of imported similar machine tools. The machine tool accuracy (positioning accuracy: 0.005mm; repeat positioning accuracy: 0.002mm), the best surface roughness quality (Ra ≤ 0.05μm in the area of ​​500mm2), the minimum electrode loss (θ ≤ 0.05%), mirror processing ( In the case of no mixing powder, the processing of φ50mm can achieve a good mirror effect. The main technical performance indexes such as the expert process database have reached the level of the international advanced machine tools, and the five-axis five-link machining has been successfully realized.

Due to the reasonable design of the equipment structure, sufficient static and dynamic stiffness, and the use of advanced and mature technology and system, the system has good dynamic quality, and the machine tool is easy to use, operate and maintain, and has beautiful appearance and excellent after-sales service. The equipment is especially suitable for precision machining of ultra-hard material parts, ultra-precision molds and parts, micro-electronic precision machinery, and is also suitable for automotive, household appliances, woodworking tools, arts and crafts, luxury jewelry and even daily necessities and food packaging.

2. AA50 five-axis linkage precision CNC EDM machine

The AA50 five-axis linkage precision CNC EDM machine (see Figure 2) is mainly used for precision and complex components of aerospace and aerospace engine products (eg, jet engine turbine disk, turbine casing, turbine disk compressor rotor and crowned overall turbine) Plate, etc.) forming and precision machining; excellent processing effect on difficult-to-machine materials such as titanium alloy, high-temperature heat-resistant alloy, low-expansion alloy; equipped with high-precision C-axis and B-axis, can realize five-axis five-linkage of complex parts of aviation and aerospace Special requirements for machining, and the 6th axis CNC interface is reserved to meet future expansion needs.

Its main technical features: 1 Using a five-axis linkage EDM special CNC system with independent intellectual property rights, to achieve precise numerical control EDM machining of complex space curved parts. 2Using high-efficiency precision EDM pulse power supply and its control system to achieve high-efficiency, high-precision and high-surface quality processing of difficult-to-machine materials. The processing efficiency of titanium alloy is more than twice that of similar equipment in the world. 3 The self-developed EDM precision CNC rotary shaft and the full immersion liquid precision CNC rotary table are used to realize the independent production of key components of the 5-axis linkage precision EDM machine tool. 4Using five-axis linkage precision EDM technology and domestic equipment to carry out precision machining of various complex curved parts, the processing efficiency can be increased by 20% compared with foreign equipment, and the electrode is saved by 30%.

Figure 1 A35 oil tank lifting precision CNC EDM machine

Figure 2 AA50 five-axis linkage precision CNC EDM machine

3. Conclusion

In the future, the demand for high-end CNC machine tools for CNC machine tools, especially high-speed, high-efficiency, high-precision, multi-axis linkage and automation, is ever-changing. For this reason, we will do our core technology and do product quality. Control to adapt to the needs and changes in the aerospace military energy sector. Solving manufacturing problems with EDM new technology and new equipment, accumulating for China's manufacturing and creating continuous contributions to China!