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一、终锻型槽的尺寸确定锻模终锻型槽的尺寸常用方法是锻件名义尺寸加收缩率,在模锻中收缩率一般取1.5～1.8％。该值考虑了终锻时锻件温度可能比允许的终锻温度高100～150℃。这种情况,在生产过程中是经常存在的。因此,从实际出发,收缩率不能低于该值,否则某些锻件就会出现超过负公差情况,造成锻件后序加工余量不足。为了增加终锻型槽允许的磨损量,提高模具的耐磨损寿命;以及保证锻件的加工余量,应采用下列公式计算终
First, the final forging groove size to determine Forging die forging groove size commonly used method is forging nominal size plus shrinkage, shrinkage in the die forging generally take 1.5 to 1.8%. This value takes into account that the forging temperature may be 100 to 150 ° C above the allowable final forging temperature. This situation, in the production process is often there. Therefore, from the reality, the shrinkage rate can not be lower than this value, or some forgings will appear more than negative tolerance, resulting in forging less than the machining allowance. In order to increase the final forging groove allowable wear and tear to improve the wear-resistant life of the mold; and to ensure forging allowance, should be calculated using the following formula