空气锤锻打锻件是靠活塞往复运动,驱动锤杆上下运动实现锻打作业的。活塞质量的优劣直接影响整机的使用寿命和工作性能。因此,对活塞的质量要求就特别高,除主要工作面要求达到(?)7的光洁度外,其它各面也要求不得有气孔、砂眼、渣眼等铸造缺陷。活塞结构如图1所示。C41-400空气锤活塞材质为HT20-40,主要部分壁厚为20毫米,重115 Forging air hammer forging is by piston reciprocating motion, driving hammer up and down movement forging operation. Piston quality directly affects the merits of machine life and performance. Therefore, the quality requirements of the piston is particularly high, in addition to the main face required to achieve (?) 7 of the finish, the other sides also require no holes, trachoma, slag eyes and other casting defects. Piston structure shown in Figure 1. C41-400 air hammer piston material for the HT20-40, the main part of the wall thickness of 20 mm, weight 115