辊锻模具型槽表面轮廓的几何分析

通过对辊锻模与锻件的啮合运动分析及几何分析，发现锻件轮廓与型槽轮廓存在共轭曲线（或曲面）关系。文中导出了参数方程、三次样条拟合函数及几种典型锻件轮廓曲线对应的辊锻模具型槽。这些结果对于精确、高效设计辊锻模具具有重要意义。

GEOMETRICAL ANALYSIS FOR THE SURFACE CONTOUR OF THE IMPRESSION IN ROLL FORGING DIES

Because the configuration along the circumferential direction of the impression is dif-ferent from that of the forging it forged,to obtain the forging geometry required by theblueprint,the roll dies in the forming roll forging must be designed reasonably.In this pa-per,by the analysis of engaging movements between the roll dies and forging,we find thatthe configuration of forging and that of die cavity are conjugate curves(or surfaces).Theimpressions of roll dies which correspond to the parametric equations,cubic spline functionsand some other typical contour curves of forging are derived in the paper.These results arevery useful to the exact and efficient design of roll forging dies.