一、概述我厂生产的薄壁筒形零件,品种规格多,尺寸及表面光洁度要求高,典型零件如图(图1): 零件材料为30CrMnSiA优质合金钢,强度σ_b=120±10公斤/毫米~2,内孔尺寸Φ80～160毫米,壁厚为1.9～2.5毫米,长度为280～680毫米,内孔椭圆度要求不大于0.02毫米,尺寸公差为0.02毫米,内孔光洁度为▽8。这类零件的生产过去所采用的装夹方法如图2。 First, an overview of our factory production of thin-walled cylindrical parts, variety specifications, size and surface finish requirements, the typical parts shown in Figure 1: 30CrMnSiA high-quality alloy steel parts, strength σ_b = 120 ± 10 kg / mm ~ 2, bore size Φ80 ~ 160 mm, wall thickness of 1.9 ~ 2.5 mm, length of 280 ~ 680 mm, the inner hole ovality requirements of not more than 0.02 mm, size tolerance of 0.02 mm, the inner hole finish ▽ 8. The production of such parts used in the past installation method shown in Figure 2.