我厂生产的汽车车箱,采用了部分薄壁冷弯型钢零件,这些型钢从其断面形状可以分为开口断面和封闭断面两类(见图1)。图11 薄壁冷弯型钢是使钢带以每分钟24～48米的速度连续经过辊压机组辊压成型的.成型后的型钢,以前是由一台随动圆盘锯在线上先进行粗倍尺锯切。粗倍尺锯切的型材为了在线下再进行定尺切断,就要给定尺切断留有备量,而且粗倍尺锯切时本身的切断误差较大,故在定尺切断时就有一段料头不能利用,原材料浪费较大。并且定尺锯切后的切口形成大量的毛刺,需要进行手工砂轮去刺清理,劳动生产率很低。锯切和去毛刺时刺耳的噪音和粉尘,造 I plant the car box, using a part of the cold-formed thin-walled steel parts, these profiles from the shape of the section can be divided into two sections of open section and closed section (see Figure 1). Figure 11 thin-walled cold-formed steel is to make the strip at a speed of 24 to 48 meters per minute continuous roll forming unit roll forming profiled steel, formerly by a servo circular saw first online Rough times sawing. Rough-length sawing profiles in order to cut off the next line for length, it is necessary to cut off a given ruler reserve, and when the coarse ruler cutting its own larger error, so cut off when there is a section Feedstock can not be used, the larger the waste of raw materials. And cut the length of the saw after the formation of a large number of burrs, need to remove the hand wheel grinding, labor productivity is very low. Grinding and deburring noise and dust, made