Research on the Influence of Salt Spray Environment on the Movement of Typical Rifle Automaton
Salt spray environment has an important influence on the tactical and technical performance and operational effectiveness of automatic rifles. However,the influence mechanism of salt spray environment on the motion characteristics and failure of rifle automaton is still unclear. A small caliber automatic rifle is taken as the test object,and a life-test in salt spray environment is designed and carried out. A series of measurements and records are carried out on the rifle after each salt spray test,including non-contact measurement of automaton motion by high-speed photography,high precision measurement of the mass of rifle bolt,recoil spring parameters test,and photographic record of bolt box and guide rail surface morphology characteristics. The conditions of failure during the life-test are counted to obtain the typical fault patterns of automaton movement. The results show that the mass of rifle bolt increases gradually with the increase in salt spray test time. The free length and pre-pressure of the recoil spring gradually decrease,and the working pressure tends to be flat after decreasing. The speed at which the bolt carrier recoils to position decreases first and then increases. The speeds at which the bolt begins to return and returns to the original position decrease gradually,and they have the same changing trend.With the decrease of the speed at which the bolt carrier recoils to position,the number of motion faults of the automaton increases,and the multi-parameter changes caused by the salt spray environment have an obvious influence on the automaton motion. Based on the experimental study,the quantitive relation formulas for the changes of the mass of rifle bolt,the recoil spring parameters and the characteristic point velocity with time are built. Quantitive relation formulas provide a reference for inferring the parameter changes of moving parts of automaton in salt spray environment and analyzing their influences on faults in motion.
small caliber riflesalt spray life testmotion of automatonparameters changefailure analysis
万方数据
维普
