我厂在长期的生产中得出几种复杂汽车零件的校直方法,现简介如下。1.变向加压校直东风牌、解放牌等汽车变速器的第一轴、第二轴、中间轴及后桥主动螺旋伞齿轮等零件,材料多为20CrMnTi,渗碳(或碳氮共渗)淬火后,往往变形较大,弯曲量常达0.3～1.5mm。由于硬度较高(HRC58～63),校直时容易断裂,故废品率较高。在生产实践中,我厂摸索出一种较好的校直方法—— I plant in the long-term production of several complex auto parts obtained alignment method, are as follows. 1. To change the pressure to straighten the Dongfeng brand, Jiefang card and other automotive transmission first shaft, the second shaft, the intermediate shaft and the rear axle active spiral bevel gear and other parts, mostly 20CrMnTi material, carburizing (or carbonitriding ) After quenching, tend to larger deformation, often up to 0.3 ~ 1.5mm bending. Due to the higher hardness (HRC58 ~ 63), easy to break when straightening, so the rejection rate is higher. In production practice, I plant to explore a better method of straightening -