What are the advantages of special machine tools for gear processing?

In recent years, with the development and universal application of computer numerical control technology, gear processing machine tools and processing technology have also developed greatly, especially in the field of high precision and large gear processing. For example, the new CNC milling machine replaces the hob with a milling cutter, and processes large wind power gears and nuclear power gears at high speed and high efficiency. The new spiral bevel gear CNC machining machine can process a variety of spiral bevel gears, which expands the application of machine tools. The use of new tool materials, high-speed machine tools to achieve dry cutting, not only improve processing efficiency and processing accuracy, but also solve the problem of green environmental protection; using on-machine detection and computer compensation technology to improve machine tool processing accuracy; machine manipulators on the machine to achieve automatic Clamping workpieces, improving work efficiency, and more.

Gears are important basic parts for transmitting power or motion in various mechanical products. Common gear types are structurally divided into cylindrical gears, bevel gears, non-circular gears, etc., and involute gears and pendulums are arranged on the tooth profile. Line gears, arc gears, etc. Gear manufacturing is indeed a specialized field. Specialized production requires special equipment to use special tools. This is due to the demand for batch and efficient production of gears. From the transmission principle, there are many gear tooth shapes that can realize motion or power transmission, but the most commonly used ones are the ones mentioned above, on the one hand because they have good transmission performance, and on the other hand, they can be used. High-efficiency, high-precision machining of special equipment and special tools is also an important reason for their widespread use. Therefore, for a long time, people have been constantly researching various gear processing machine tools, special tools, and special processes to meet the needs of various gears in various industrial fields.

Most of the traditional gear processing machines use the knurling method to process the gears according to the principle of gear meshing. Some of them use the forming method to machine the gears. The main motion relationship between the machining tools and the gears to be processed is equivalent to a pair of meshing gears or The relationship between the racks. After the use of numerical control technology, the machining efficiency and machining accuracy of the gear processing machine are further improved, but the basic machining principle has not changed.

The universal 5-axis 5-link CNC machine is mainly used to realize the machining of complex curved parts. The tooth surface of the gear is a special kind of complex curved surface. In theory, as long as the mathematical model is established and the numerical control programming problem is solved, the gear tooth surface of any tooth shape can be processed by using the 5-axis 5 linkage CNC machine tool and the spherical milling cutter. Therefore, the 5-axis 5-link CNC machine tool has special advantages in solving the new gear tooth surface machining.

However, in the processing of common gears, the machining efficiency of 5-axis 5-link CNC machine tools and spherical milling cutters is much lower than that of special gear machining machines, especially in hard tooth surface machining, and the machining accuracy is not high. Has an advantage (can not be ground). The so-called milling and grinding machine, 5 axis 5 linkage machine tool can meet the requirements of gears in machining accuracy (can achieve 3 levels of precision), I think it is possible to achieve without considering efficiency, but it does not have universal applicability. . 5-axis 5-link CNC machine tools are used in gear machining. The main function is to solve the new gear tooth surface machining and play a role in some specific situations. In the common gear tooth processing, especially in mass production gears, Processing efficiency, machining accuracy or processing cost, special machine tools still have a big advantage.

In general, special equipment for gear processing and special tools are constantly innovating and developing. There is no problem that restricts the development and innovation of gear manufacturing. As for the special equipment, the existing equipment can not meet the requirements. The use of 5-axis 5-link CNC machine tools and general-purpose tools to solve special gear processing problems is also a convenience for the development of modern CNC machine tools. It cannot and should not be It opposes the role of the gear plane, it just provides a useful supplement. With the development of gear transmission technology, there will be some new gear application requirements, and we will propose the research and development of new, efficient and high-precision gear processing equipment.

Weihai Huadong CNC Co., Ltd. is cooperating with Germany's Heath Zhuangming Co., Ltd. to develop and produce a large CNC hobbing machine with a maximum diameter of 16m. The maximum machining modulus is 40 for hobbing and 60 for single indexing. Suitable for the processing of large gears for new energy sources such as wind power and nuclear power;

It also cooperates with Shenyang Gettech Machinery Equipment Co., Ltd. to produce spiral bevel gear sub CNC machine. It is divided into milling gear and grinding gear. The maximum machining diameter is 2m for soft tooth surface and 1.6m for hard tooth surface. The number can reach 30; also independently developed a general-purpose program-controlled and CNC gear hobbing machine with a maximum machining diameter of 5m, 6.3m, and 8m; and also developed a small-modulus and small-tooth number full CNC hobbing machine for the fishing reel industry, which can realize gears. Axial arc CNC machining with an accuracy of 6 levels.