汽门校直方法手工校直,有消耗人力多、生产效率低、技术熟练程度要求高和工作环境差等缺点,不适宜大批量生产中使用。机械校直。日本津上公司生产了汽门校直机,校直杆部直径9.3mm的汽门,在115.5mm长度上,杆部跳动为0.08mm以内,毛坯滚压前的跳动应在0.38mm以内,滚压时间为5s。在我国,有些杆件已采用了机械校直,但校直精度不理想。如某人力车厂利用两个平行的光滚子校直16Mn杆件,直径32mm、长1080 Valve straightening method manually straightening, there are more manpower consumption, low productivity, high proficiency requirements and poor working conditions and other shortcomings, not suitable for mass production. Mechanical alignment. Japan Tsukasu company produced a valve straightening machine, straightening the rod 9.3mm diameter valve, 115.5mm in length, the club beating 0.08mm or less, the rough before rolling the beating should be within 0.38mm, rolling Pressure time is 5s. In our country, some bars have adopted mechanical straightening, but the straightening precision is not ideal. If a rickshaw factory uses two parallel optical roller alignment 16Mn rod, diameter 32mm, length 1080