长杆类鍛件,如螺栓、长尾小齿輪等,在冷鐓机、摩擦压力机或平鍛机上生产,效率是很高的。但目前仍有許多工厂在汽錘上鍛造这类鍛件,有的还采用着自由鍛造的方法。下面介紹的这两种鐓粗工具,对于在汽錘上或采用自由鍛造生产长杆类鍛件是很适用的。它們的共同特点是:1)結构簡单,制造方便;2)可以利用原材料直接镦出头部,省却拨料和剁料头工 Long rod forgings, such as bolts, long tail pinion, etc., in the cold heading machine, friction press or flat forging machine production, the efficiency is high. However, there are still many factories forging such forgings on hammer hammers, and some also use free forging methods. The two upsetting tools described below are well suited for the production of pylons forgings on the hammer or by free forging. Their common features are: 1) simple structure, easy to manufacture; 2) can use the direct upsetting of the head of raw materials, save dialing and chop material workers