At present, the production and processing of the gun barrel caliber are mostly small batch. If the processing quality is controlled using the traditional SPC method directly, it is difficult to ensure the required sample size. For this situation, the small batch quality control theory and international basic ideas were introduced. The control model of the gun barrel caliber processing quality was established based on X—Rs control chart. Finally, taking the processing of a certain type of gun barrel caliber for example was analyzed.

3D printing technology is one additive manufacturing technology based on the principle of material accumulation. The domestic and foreign research status is specially introduced. The main principles and features of 3D printing technology are summarized. The applications in the civilian aspect is analyzed

The temperature of the gun chamber interior wall is an important parameter for the research of the gun barrel life, and the heat transfer by conduction rule between the barrel interior and exterior wall can be ensured by measurement extrapolation method or method of finite element. By choosing a suitably, designed a measurement device of the gun barrel temperature which can be used to measure and memorize the exterior wall temperature of the gun barrel.

Against the accurately solving of system reliability was inadequate, the Copula function was applied in system reliability analysis of weapon equipment, the paper established system reliability model which obtained the second shift single driving, and obtained the common relationship between travel and system reliability degree, it tested that Copula function was better to solve correlation problem in the system reliability model .It provided a method for system reliability analysis and reliability susceptive analysis.

Aimed at the problem in the gun barrel life prediction, a method of gun barrel life prediction based on record of firing was pointed out. On the basis of internal trajectory resolving, the equivalent life transform coefficient for gun barrel based on the overall heat in origin of rifling and the overall gun pressure was computed. And by assuming we wore gun barrel life in canonical record of firing, a conversion model between the equivalent life transform coefficient for gun barrel and variety of record of firing which could be used to realize the gun barrel life prediction was built by using BP network.