随着国民经济的发展和人民生活水平的提高,对自行车的需要量越来越大.近几年虽然自行车的产量有大幅度的增加,但仍满足不了日益增长的需要. 对脚闸自行车而言,脚闸身毛坯的生产是关键.过去,这一零件是用压力机胎模锻造工艺生产的,班产千件左右,工人劳动强度大,不安全,浪费金属.为了迅速改变这一落后面貌,赶超世界先进水平,青岛自行车厂和一机部机械研究院机电所合作,在烟台轴承厂的协助下,开展了对螺旋孔型横轧新工艺的研究,经一年零三个月、一百廿余次的试验,终于在Z H100型轧环机上试验成功,并已投入生产, With the development of the national economy and the improvement of people’s living standards, the demand for bicycles is growing. In recent years, although the production of bicycles has increased substantially, it still can not meet the increasing needs. In the past, this part was produced by a die-forging process with a press, with about a thousand pieces in production, workers being labor-intensive, unsafe and wasting metal. In order to quickly change this Behind the face, catch up with the world advanced level, the Qingdao Bicycle Factory and a machinery Institute of Mechanical and Electrical Cooperation, with the assistance of Yantai Bearing Factory carried out a spiral hole cross-rolling new technology research, after one year and three Month, a hundred and twenty times the test, and finally Z H100-type rolling ring machine on the successful test, and has been put into production,