我厂在4吨·米无砧座锤上进行模锻生产,其产品有船用转环、活塞芯、陀罗转子、煤矿用手把体、顶盖等锻件。在生产中一直采用两种锻模结构:对简单锻件采用圆柱形锻模(如图1),无定位装置、只有简单的圆周导向,这种锻模结构简单,加工方便,但在锻造时,由于锻造设备精度较差,上下模之间容易错移(2～4毫米),影响锻件质量,对切除锻件飞边也带 I plant in the 4 tons of anvil without hammer forging on the production, its products are marine swivel, piston core, Tuo Rotor, hand with mine body, roof and other forgings. In the production has been used in two kinds of forging structure: Forging forgings using cylindrical forging die (Figure 1), no positioning device, only a simple circumferential guide, this forging die structure is simple, easy processing, but forging, As forging equipment accuracy is poor, easy to shift between the upper and lower mold (2 to 4 mm), affecting the quality of forgings, cutting forgings also with flash