Velocity Analysis of Barrel Bore Cleaning Device with Abrasive Brush

Abstract

After the barrel is fired, the dirt in the barrel will affect the firing performance and service life of the barrel, and it’s hard to be removed. It is time-consuming and labor-intensive to clean the dirt manually. However, the existing automatic cleaning methods have poor cleaning effect, and the use conditions and scenes are greatly limited. Based on the rifle barrel with an inner diameter of 105 mm, a cleaning method using a wheeled abrasive brush was proposed. To study the influence of two important dimensions of abrasive brush, namely brush wire diameter and brush wire width, on the running velocity of cleaning device, according to the structural characteristics of abrasive brush, the interaction model between abrasive brush and the barrel bore was established, and then the mathematical model was obtained, which explained the influence of brush wire diameter and brush wire width on the running velocity of cleaning device. Then the influence of the change of two dimensional parameters on the running velocity of the cleaning device was tested in practice. Considering the influence on the reciprocating stroke and velocity of the abrasive brush due to the actual structure of the double-acting cylinder, the speed calculated according to the test results is 1.27 times that that according to the theory, and the obtained mathematical model was modified using MATLAB. The maximum error between the velocities obtained by experimental test and the velocities calculated by using the modified mathematical model was less than 10%. Finally, the cleaning test of barrel bore was carried out. By observing the cleaning effect of abrasive brushes with different parameters, it was determined that the diameter and width of brush wire suitable for barrel bore cleaning was 1 mm and 150 mm, respectively.