Cam Cad / Cam System Of Research And Development

Cam mechanism can transfer the revolvement of cam to the motion of carrier by rule, so be very widely applied in various machine. With numerical manufacture is widely applied in our country, it is necessary to realize CAD/CAM of cam. But all designed software before in our country still have some weakness,for example,the conventional type of cam counld be projected by these software is very little,and used lines approach to arcs of cam which is have bigger error and more nodal points . In furthermore, these software of designing cam in fact only have the function of CAD. If you want to simulate and work over the have designed cam in that software,you will find that you have to export it to other general CAD/CAM system software(e.g MasterCAM). So these designed software be not satisfactoty for use. In this situation, the paper's writer designed the 'Cam CAD/CAM System' software after studied present technique state of designed software for cam in our country and correlation techniques of CAD/CAM.In the former, to cam mechanism, the carrier only have one direction motion. If you want have 2D motion, then you have to fit it by two cam mechanism, so it not only occupy bigger space, but also lower the motion accuracy. So the writer designed the axial cam with carrier in 2D motion.The software can design many conventional type of cam, concluding of edge cam with middle carrier, edge cam with offset carrier, axial cam, dividing axial cam, and axial cam with carrier in 2D motion, etc. In forming working curves of edge cam, used the error method of arc approach which can lessen the nodal points on curves of cam uttermostly in same error, so it reduce the computation time .The most special feature of the designing software of cam is fulfill the CAD/CAM intergration, that is when you designed a cam by the software, you can change it into NC code directly, and can simulation it in this software by calling AutoCAD, or machining it by transfer NC code to numerical control machine. In addition, it had founded the data base and universal post processing in the software for facilitating user to operate.The cam CAD/CAM system software possess designing method of conventional types of cam, own the advanced curves approach algorithim and complete performance, so it has great practical and theoretical value.