From December 1st to 2nd, 2012, the 2012 China Gear Industry Development Summit was held in Qianshan, Anhui. Professor Wang Xiaoyu from Beijing Jiaotong University introduced the gear design and manufacturing technology based on machining center.
As a very special category in mechanical manufacturing, gear processing is characterized by the fact that the tooth surfaces that need to be machined are usually complex curved surfaces with special shapes, not only each tooth surface has a high precision, but also between the tooth surfaces. To have a high relative positional accuracy, there must be a high positional accuracy requirement between the entire ring gear and the mounting surface.
After years of theoretical research and practice, Professor Wang Xiaoyu summed up a method of machining gears with machining centers, which not only provides a new high efficiency, low cost, high flexibility and fastness for single-piece small batch and large modulus gear processing. The responsive manufacturing method also breaks through the limitations of the old manufacturing process on the product structure, laying the foundation for the realization of high power density, lightweight transmission mechanism and some innovative design solutions.
The modern machining center with multi-axis linkage function can process various complicated curved surfaces with high efficiency and high precision, and has good flexibility. By loading different G codes, different shapes and shapes can be processed on the same machine tool . Type of part. Wang Xiaoyu said that when machining a tooth surface on a machining center, it is usually not processed by forming or forming, but it is processed as a curved surface, so the contact length between the tool and the workpiece is much smaller than that of the conventional gear. processing methods.
The use of a well-structured machining center for machining gears has good rigidity, positioning accuracy and repeatability. In addition, the cutting force during finishing is much smaller than that of conventional machining methods, and good machining accuracy can be obtained. In addition, since the machining center has a tool magazine, the tool change speed is very fast. In the roughing and semi-finishing stages, the most suitable tool can be selected for different steps to improve the processing efficiency.
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