某单位进行78式八二无座力炮靶场射击过程中,已先后发生过两次炮弹底火铜帽牢牢贴在击针螺堵孔表面的现象。由于经过击针撞击,贴在螺堵上的铜帽向外鼓出一个形似击针尖的突起,比较坚硬。当进行第二发射击关闩时,该突起就可能象击针一样,首先与膛内待发的炮弹底火碰击,打响底火、产生关闩走火,造成毀炮伤人事故。第一次由于没有及时发现该问题,产生关闩走火,把操作手的3个手指切掉,火炮闩 During the shooting of a 78-type 78-seat non-artillery firing range at a certain unit, there have been two occasions when the copper bottom cap of a mortar fire was stuck firmly to the surface of the plug hole of a needle screw. As a result of striking the needle, the copper cap affixed to the screw plug bulges outwardly into a bump that resembles the tip of the needle, which is harder. When the second firing hit the latch, the protuberance may be like a firing pin, first hit the bottom fire with the mortar to be fired, fired the end of fire, resulting in latch off fire, causing the destruction of artillery wounding accident. For the first time did not find the problem in time, resulting in latch off the fire, the operator’s three fingers cut off, artificial latch