Changes in the Characteristic Parameters of a Small-caliber Rifle in Fugitive Dust Life Test
The fugitive dust environment has an important impact on the performance and reliability of firearms,and the whole gun life test is carried out to obtain the change law of firearm characteristic parameters and analyze the causes according to the fugitive dust emission test standards specified.The high-speed photography and light curtain target are used to record the changes of the initial speed,firing rate,and characteristic point speed of firearm,and analyse and explain the influence of the parameter changes on the performance degradation of rifle.The test rifle is set as a control group to analyse the maintenance effect of rifle on the maintenance of firearm performance.The test results show that the pre-pressure and free length of the spring in the fugitive dust environment show a decreasing trend with the increase in the amount of projectiles,but the stiffness of spring does not change significantly,and at the same time,the performance degradation magnitude of the piston spring is greater than that of the recoil spring,which in turn is greater than that of the hammer spring.The rifle has an obvious phenomenon of hanging copper with the increase in the amount of projectile,which leads to the change inthe structural parameter of guide chamber.The wear of friction pair leads to an increase in the motion gap between the components,but oiling slows down this degradation.Based on the full-gun life test,the experimental validation is provided for clarifying the influence mechanism of motion characteristics and failure of automatic mechanismin the fugitive dust environment,and the data support is provided for researching the change rule of small-calibre rifleperformance.
riflefugitive dust environmentperformance degradationautomaton movement characteristicfirearms reliability
万方数据
维普
