Research On CAD/CAM/CNC Integrated Grinding System Of Disk Cams

Cams are one of key parts of automatic machines, and higher procession and proficiency for cams machining are required, as the automatic machines are used widely, they work in higher speed, and their higher dynamic property. In other aspect, cams are difficult machined parts for their complex shape and higher machining requirements. In this paper, the basic theory for cams machining, the manufacturing mode, the machining equipment, the grinding force control, the automatic positioning, and the inspecting in line are researched in detail, taking disk cams as object which are widely used in engineering. Main contents of the dissertation are follows:Machining methods of cams often used in engineering are analyzed, and mechanics in cams machining is summarized, including calculating for center of cutter, control algorithm for even feeding speed, analyzing for acceleration of cams, and compensation of cutter diameter, which are theoretical bases of cams machining and calculation of cutter center and algorithm of even speed control of them are used in programming of cams machining.The concept of cams CAD/CAM/CNC integrated machining system is proposed, its system construct is researched, and its supporting techniques are pointed out. This concept proposes a new manufacturing mode for single or small batch complex parts. In order to research the manufacturing mode in detail, a prototype CAD/CAM/CNC integrated system for cams machining is developed. Techniques included in the system are PC based open architecture CNC system, real time simulation of machining process, parametric CNC programming, computer vision based cams automatic positioning and in line inspecting, and grinding force adapt control. This prototype system is researching platform for CAD/CAM/CNC integrated system, and is main content of the paper.Two main functions of the system are introduced in detail, which are automatic positioning of cams block & in line inspecting of cams profile, and adapt control of grinding force. The necessity of the two functions is proposed first, and then the principle, the algorithm, and design of hardware & software are introduced in detail. The setting up of cams CAD/CAM/CNC integrated system is introduced, and some experiments, including cams grinding and cam blank automatic positioning and inline inspecting, are conducted in the system. The results of the experiments prove out the technique points of the paper.