目前,国内常用的等离子切割炬,均采用双密封面的夹层水冷喷嘴。它靠压帽与割炬下体的紧固,压住喷嘴的两个密封面来保证冷却水的无漏循环。这种喷嘴,从图1可见,由于受其几何形状的限制,在机械加工时难度较大。通常,在没有特殊的工装卡具时,每加工一个喷嘴,需要更换四种不同角度的刀具,才能完成整个加工过程。同时,喷嘴的两个密封端面精度要求较高,不允许 At present, the plasma cutting torch commonly used in the country adopts the sandwich water-cooled nozzles with double sealing surfaces. It is by pressing the cap and torch body fastening, suppress the two sealing surfaces of the nozzle to ensure the cooling water circulation without leakage. This nozzle, as can be seen in Figure 1, is more difficult to machine due to its geometry. Normally, in the absence of special tooling fixtures, one nozzle per nozzle needs to be changed in four different angles to complete the entire machining process. At the same time, the nozzle of the two sealing face precision demanding, not allowed