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在锤上模锻能力不足的中、小型锻造车间里,象汽车变速箱第一轴这类锻件的习惯锻造工艺为:下料-加热-压印-制坯-用开式套筒模锻造成型。但操作误差会引起中间台阶处出现折叠,由于制坯误差及氧化等原因也会使杆部的成型尺寸超过负偏差,并且工序较多,效率不高。为此,我们对EQ140型变速箱第一轴的锻造工艺作了改进(零件简图见图1),设计了组合型摔
In the hammer forging capacity of less than medium and small forging workshops, such as the first gearbox for automotive transmission forging such as the customary forging process: Blanking - Heating - Impression - Blank - with open sleeve forging forming . However, the operation error will cause the intermediate step to appear folded. Because of the error of the billet and oxidation, the forming size of the rod will exceed the negative deviation, and the process is more and the efficiency is not high. To this end, we have made improvements to the forging process of the first shaft of the EQ140 transmission (part diagram shown in Figure 1), designed a combination of wrestling