一前言在要求一切商品都要价廉物美的今天,显然这些商品的零件也必定要高精度、形状复杂、价格低。使用模具加工零件,可以满足这样的要求。因此近年来,尤其是成形塑料零件,广泛使用这种方法。确保塑件的精度,基本条件在于测量塑件和模具。由于测量困难和费时,所以复杂的三维形状大多使用三坐标测量机。因而,各方面对测量机又提出了提高精度、数据处理机能、 A foreword Today, when all the goods are demanded to be cheap, it is clear that the parts of these goods must also be of high precision, complex shapes and low prices. The use of mold parts, to meet such a requirement. In recent years, plastic forming parts have been widely used, for example. To ensure the accuracy of plastic parts, the basic condition is to measure plastic parts and molds. Due to the measurement difficulties and time-consuming, complex three-dimensional shapes mostly use a CMM. Therefore, all aspects of the measuring machine has also raised the accuracy, data processing performance,