Gear processing of gear reducer
Gear reducer gear processing, as for the existing equipment that cannot be satisfied under special circumstances, the use of 5-axis 5-link CNC machine tools and general-purpose tools to deal with special gear processing problems is also an inconvenience brought to us by the development of modern CNC machine tool technology. It cannot and should not be unified with the function of the gear plane, but it only provides a useful supplement. With the development of gear transmission technology, the application requirements of some new gears will always emerge, giving us the subject and task of researching and developing new, efficient and high-precision gear processing equipment.
With the development and wide application of computer numerical control technology, in recent years. Gear processing machine tools and processing technology have also been greatly developed, especially many new skills have emerged in high-precision, large-scale gear processing. For example, the new CNC gear milling machine replaces the hob with a milling cutter to process large wind power gears and nuclear power gears at high speed and efficiently; the new CNC machining machine for spiral bevel gears can process spiral bevel gears with various tooth systems, expanding the practicality of the machine tool. It adopts new tool materials and high-speed machine tools to complete dry cutting, which not only improves the processing efficiency and processing accuracy, but also solves the problem of green environmental protection; adopts on-machine inspection and computer compensation techniques to improve the machining accuracy of the machine tool; Automatic clamping of workpieces, improved performance of hard-toothed helical gear reducers, and so on.
Gear is an important basic part used to transmit energy or static in various mechanical products, and gear is an important basic part used to transmit energy or static in various mechanical products. Rare gear types are divided into cylindrical gears, bevel gears, non-circular gears, etc. from the structure, and involute gears, cycloidal gears, arc gears, etc. from the tooth shape. Gear manufacturing is indeed a specialized field. Specialized production requires special equipment and the use of special tools. This is due to the demand for mass and efficient production of gears. In terms of transmission principle, there are many gear tooth profiles that can complete static or energy transmission, but the ones mentioned above are the most used in practice. The reason is that it has good transmission performance, and can use special The high-efficiency and high-precision machining of equipment and special tools is also an important reason for its widespread use. Therefore, people have been studying various special machine tools, special tools and special processes for gear processing to meet the needs of various industrial fields for various gears.
Most of them are based on the principle of gear meshing, using hobbing method to process gears, and traditional gear processing machine tools. Part of the forming method is used to process the gear, and the important static relationship between the processing tool and the gear to be processed is equal to the static relationship between a pair of meshing gears or racks. After adopting numerical control technology, the processing efficiency and processing accuracy of gear processing machine tools have been further improved, but the basic processing principles have not changed.
Practically speaking, the general 5-axis 5-link CNC machine tool is mainly used to complete the processing of complex surface parts. The tooth surface of a gear is a special kind of complex surface. Only by establishing a mathematical model and solving the problem of CNC programming, the use of 5-axis 5-link CNC machine tools and spherical milling cutters can process gear tooth surfaces with arbitrary tooth shapes. Therefore, 5-axis 5-link CNC machine tools have special advantages in processing new gear tooth surfaces.
The processing efficiency of using 5-axis 5-link CNC machine tools and spherical milling cutters is much lower than that of using special gear processing machines, but in terms of processing rare toothed gears. In particular, the efficiency of hard tooth surface processing is lower, and the processing accuracy is not inferior (can not be ground). The so-called milling instead of grinding, the 5-axis 5-link machine tool can meet the requirements of gears in terms of machining accuracy (can reach 3-level accuracy) concept , It is believed that the hardened helical gear reducer can be reached without considering the effect, but it does not have wide practicability. The 5-axis 5-link CNC machine tool is used for gear processing, and its important role is to deal with the processing of new gear tooth surfaces, and it plays a role in some specific situations; in the processing of rare toothed gears, especially in the production of gears in batches, whether it is processing efficiency , The processing accuracy is still the cost of processing, and the special machine tool still has a big disadvantage.