我厂在加工如图1所示的零部件时,过去靠手拿工件与120~#砂布进行打磨;因为工件材料是一种软塑料,况且加工余量较大(毛坯为2.20毫米,成品尺寸为1.00(?)毫米),用手持无法使工件保持平直,因此质量得不到保证,常常会出现一边厚一边薄的现象,而且速度也很慢,每干一件产品需要30～60分钟,废品率也很高,约在20～30%之间,此种加工方法费时费力,质量差 I plant in the processing of components shown in Figure 1, the past by hand to take the workpiece and polished to 120 ~ # emery cloth; because the workpiece material is a soft plastic, Moreover, the machining allowance larger (blank 2.20 mm, finished size 1.00 (?) Mm), the workpiece can not be held flat by hand, so the quality can not be guaranteed, often there will be a thick side of the thin phenomenon, and the speed is very slow, each product requires 30 to 60 minutes, The rejection rate is also very high, about 20 to 30%, this method of processing time-consuming and laborious, poor quality