一种拉刀螺旋容屑槽前刀面磨削砂轮安装位姿计算方法

Helical gullets are important structure of the helical broaching tools, and the precision and high-quality sharpening for the corresponding rake flanks is significant to the work performance and the life of the broaching tools. Therefore, a wheel setup method for the helical rake flank sharpening is proposed. Firstly, the wheel setup model and the motion matrix are established. Next, a discrete spatial wheel swept volume based machined gullet axial section profile identification method is presented, as well as the tracing of the discrete contact curve. On this foundation, the grinding processes of helical rake flank are analyzed and the constraints conditions are summarized, the wheel orientation calculation model for the helical rake flank is given as well as the optimized search solving method. At last, examples are performed by proposed method, and its effectiveness is verified by the precision comparison with analytical method results and the distribution status of contact curve. Moreover, the analyses of the relationship among wheel orientation, wheel radius and width of machined gullet is taken, and optimal selection of wheel setup is suggested.