十字钎头(如图1)用于矿山设备中冲击钻机上。十字形钎头的锻造比一字形复杂的多,没有大型的模锻锤就更困难。在党的“自力更生,奋发图强”方针的指引下,采用三结合方式,经多次研究,终于在M134型3吨自由锻锤上改用型砧的办法试锻成 Cross drill bit (Figure 1) for mining equipment in the impact drill. Cross shaped drill forging more complex than the glyph, without a large forging hammer even more difficult. In the party’s “self-reliance, work hard and strong” under the guidance of the guidelines, the use of three combinations, after many studies, and finally M134 type 3 tons of free forging hammer on the use of type anvil test forging into