我厂的普通气门钢(如 40Cr、40r9Si2)下料采用冲床剪切下料,它具有效率高,操作简单,断口无金属损耗,模具费用低等优点,但也不可避免地产生断口变形,端面不平整,且料端面偏等缺点。我厂气门毛坯工序流程为:下料→抛光→倒角→电镦→压力成型,未设立下料断口的车加工工序,所以料端偏角过大,不仅使气门钢的倒角不均,而且在电镦时极易弯曲,造成气门电镦后无法放入锻模中而报废。因此,分析和解决下料偏角过大问题是有重要意义的。 Ordinary valve steel (such as 40Cr, 40r9Si2) of our factory is cut by blanking, it has the advantages of high efficiency, simple operation, no metal loss at fracture and low mold cost, but it also inevitably produces fracture deformation, Not smooth, and the material side and other shortcomings. I plant valve blank process flow: cutting → polishing → chamfering → electric upsetting → pressure molding, cutting operation has not set the cutting process, so the material end of the corner is too large, not only the unevenness of the chamfer of the valve steel, And when the electric upset easily bent, resulting in the valve electric upset can not be put into forging scrapped. Therefore, it is of great significance to analyze and solve the problem of excessive declination.