论文部分内容阅读
在自由锻锤上用开式筒模锻造时,由于法兰大,所需坯料也大,坯料的高径比有时很大。当高径比达到2.5～3时,镦粗时坯料容易镦歪。常用的矫正方法,一般是用垫铁把筒模的一边垫高,锤击坯料,使金属向另一边流动,或用赶铁将坯料赶向最需要的方位。当H/D<1时(H为坯料高度,D为坯料直径),镦歪的坯料用上述方法很难矫正,如继续镦粗,坯料就会严重分布不均,造成一边有很多飞边,另一边充不满模膛的观象,使锻件报
In the free forging hammer with open tubular forging, due to large flanges, the required billet is also large, billet height ratio sometimes large. When the height to diameter ratio of 2.5 to 3, the upsetting billet easy upsetting. Commonly used methods of correction, the general is to use one side of the horn cushion padded, hammering blank, so that the metal flow to the other side, or use the rush to catch the billet in the most needed position. When H / D <1 (H is the blank height, D is blank diameter), upset crooked blank is difficult to correct by the above method, as continued upsetting, the blank will be unevenly distributed, resulting in a lot of flash on one side, The other side is full of moldy images, so forgings reported