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目前,数控机床采用的插补方式就是直线和圆弧。但是随着科学技术现代化和自动化的高度发展,在一些部门和生产领域中,出现了加工形状复杂另件的要求,这种复杂形状的零件大多是高次曲线的和立体的。如航空工业中的飞机机翼;造船工业中的船体;有的是抛物线的形状、有的是肋骨线(三次曲线)的形状。诚然,这些高次曲线可以被分割成若干段,每一小段可以用直线和圆弧来逼近,这样做的结果,首先降低了加工精度,插补误差大;其次纸带长、编程复杂、程序段多。本文主要论述只要给出几个简单的数据,就能插补出整条高次轮廓曲线。本法的特点:运算简单;高次曲线插补的最大插补误差小于0.707个脉冲当量;速度控制容易。
At present, the interpolation method used by CNC machine tools is straight line and arc. However, with the rapid development of modernization and automation of science and technology, there have been demands in some departments and production areas for processing complicated shaped parts, which are mostly high-grade curved and three-dimensional. Such as the aircraft industry in the aircraft wing; shipbuilding industry in the hull; some parabolic shape, some rib line (cubic curve) shape. Admittedly, these high-order curves can be divided into several segments, each of which can be approximated by a straight line and a circular arc. As a result of this, the machining accuracy is reduced and the interpolation error is large. Secondly, the paper tape is long and the programming is complicated. More paragraphs. This article mainly discusses as long as given a few simple data, you can interpolate the entire high profile curve. The characteristics of this law: the calculation is simple; the maximum interpolation error of high order curve interpolation is less than 0.707 pulse equivalent; the speed control is easy.