机械加工生产中,攻丝时常常发生丝锥损坏而产生废品。其形成原因以及防止方法可以大致归纳如表1。损坏形式损坏原因防止方法丝锥萌芽工件材料中夹有硬块等缺陷。攻丝前要仔细检查底孔中有无砂眼,夹渣等。遇到这种情况,要仔细慢攻。切屑堵塞使攻丝锥在孔中挤压。攻丝时丝锥要经 Machining production, tapping often occur when the tap damage and waste. The formation reasons and prevention methods can be summarized as shown in Table 1. Damage Forms Causes of Damage Prevention Methods Tap Sprue Workpiece Material is clogged with defects such as lumps. Before tapping to carefully check the bottom hole blisters, slag and so on. Encounter this situation, we must carefully slow attack. The chip plug causes the tapping cone to squeeze in the hole. Taps tapping to go through