Hobbing Functional Machine Tool, Based On Siemens 802s / C Platform

To achieve compound machining by utilizing multiple spindle NC machine tool is one of the most popular international machining technology , and it belongs to advanced manufacturing technology. Compound machining concentrates kinds of different machining technology on machine tool. In accordance with the Machine Tool Association' s prediction, NC multiple function compound machine tool is one of the developing tendency of machine tool industry in the 21TH century and has wide prospect with increasing market demand year by year . NC machine tool confirms its important position and has been widely used in manufacture. But the ordinary NC machine tool is simply functioned and can not satisfy the requirement of NC multiple function machine tool .Although the developed countries have reported it, it can not fit the requirements of domestic medium-small enterprise owning to its high price. In intensive market competition, the medium-small enterprise engaging in machining needs new type equipment with low cost, high efficiency and machining precision and stable equality to protect themselves. Therefore , it is of great significance to research and develop a sort of multiple function NC tool.The paper discussed the machining of NC gear hobbing and compound machining of the fourth spindle which expanded the scope of its application the Siemens 802s platform. Based on peculiar technology- "CNC" (computer numerical control) system of gear machining machine tool" of Lanzhou university of Science and Technology. However, the paper utilized the self-researched impulse servo control pad including the function module, for example gear transmission, "electronic differential transmission" function frequency division ","gunlock", and etc.Meanwhile,this paper analyzed the present situation and developingtendency of domestic and abroad NC system and gear machining technology. Rased on the ultimate principle of cylinder gear and involute and oblique t.onth gear surface, it explained the motion and characteristic of gear hoboing process and discussed in detail the control methods with "electronic tooth division transmission" , electronic differential transmission" an "position control principle" .Furthermore, a total proposal was presented for compound machining machine tool with gear hobbing function on the Siemens 802s platform. The paper illustrated primary structure configuration and control principle, designed the interface between Siemens802 and self-researched impulse servo control pad ,designed the software, hardware and working principle of NC gear hobbing multiple function, compound machining machine tool on the Siemens 802S/C platform system for straight tooth and oblique tooth gear, and solved how to achieve communication between computer with 802S/C and PLC program transmission method agreement.