Method for manufacturing stainless steel tail gas pipe of car, and automatic cutter for cutting stainless steel pipe

A technology for manufacturing the stainless steel pipe used as the tail gas pipe of car includes examining raw material, shearing, welding to become pipe, drawing, pressure test, washing, annealing, straightening, sizing, cutting off, straightening, reducing diameter, sizing, cutting off, washing and refining. Its automatic cutter is composed of machine frame, base plate, fixature, small bearing holder and pressing plate, intermediate bearing holder, rotary plate, abrasive dis, and its mainshaft, motor, sizing unit, etc. The finished pipe features high size precision, smooth surface, and hith uniformity in hardness. 一种尺寸精确、内外表面光亮度好、硬度均匀、奥氏体化均匀、无毛刺、无开焊、光洁度高、切断质量好、切断效率高的不锈钢汽车尾气管的制造方法及不锈钢薄壁管切断机，方法为原材料检查、带材剪切、焊管、减壁减轻拉伸、盘管压力检测、清洗、退火，退火时氨分解温度为600～900℃，退火温度为900～1100℃，退火速度8～14米/分，再生气氛温度为200～400℃；调直定尺切断，矫直，工艺缩管，定尺切断，清洗，成品精整，包装入库；该不锈钢薄壁管切断机包括机架、底板、夹持体、小轴承座和压板、中间轴承座、转板、砂轮主轴、砂轮、电机、电机底板和定尺体，在机架上还设有压板升降气缸和砂轮进给气缸，压板升降气缸与压板连接，砂轮进给气缸与电机底板连接。