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切割具有锥度刃口的凹模时,除要求带有锥度外,并希望锥度的刃口也能得到补偿,见图1。R按自身的逐点插补原理进行插补。 R与r_1的关系是按角度随动原理,以直线函数的公式进行插补完成锥度控制[1]。 r_2的轨迹,是采用比例积分器由r_1中分离出来。此法结构简单,精度较高,并已在实践中得到验证。图1中 R为型腔切割半径;r_1为锥度切割半径;r_2为锥度刃口补偿半径。一、比例积分器的原理及框图
When cutting a die with tapered cutting edge, the cutting edge, which is required to be tapered, is also to be compensated, as shown in Figure 1. R according to their point-by-point interpolation principle of interpolation. The relationship between R and r_1 is based on the principle of angular follow-up, and the taper control is completed by the formula of linear function [1]. The locus of r_2 is separated by r_1 using a proportional integrator. This method is simple in structure and high in precision and has been verified in practice. R in Figure 1 is the cavity cutting radius; r_1 is the taper cutting radius; r_2 is the taper cutting edge compensation radius. First, the principle of proportional integrator and block diagram