Several researchers have developed various spinning methods to produce non-circular hollow parts. In this paper, an approach that the rollers revolve around the roller principal axis was used to generate a concentric circular trajectory to the spinning trilateral workpiece. The spinning simulation was performed in ABAQUS 2016/Explicit software. The trajectory of the roller is derived, and the distributions of the equivalent von Mises stress, equivalent strain, wall thickness of the workpiece in typical section and spinning force are obtained. The simulation experiment proves the feasibility of using the proposed spinning method to produce workpieces with trilateral cross-section. The results demonstrated that after seven passes, in the area where the roller unloads the workpiece and the area where the roller starts the forward pass, local wrinkling may be generated; the most vulnerable area of the workpiece is also located at the area where the roller starts the forward pass, while the overall thinning rate of the workpiece is below 21%. Compared with other existent non-circular spinning methods, this novel method could process non-circular parts with a high rotational velocity, while ensuring the roller processing trajectory with high accuracy. The application of this method will improve the efficiency of the process by more than 200% in theory, while ensuring workpiece quality

In view of the need to improve the automation and weighing accuracy of solid energetic materials in the weighing process, to reduce the process safety risk of the automatic conveying and loading process and improve the equipment safety control ability, a weight-loss pneumatic vibration conveying device is designed, which adopts the method of weight loss measurement. Through the weighing sensor installed on the weighing platform, the weight of the materials in the weighing hopper is fed back to the controller in real time, The controller obtains the weight reduction per unit time (i.e. the actual flow) through the internal algorithm. According to the difference between the actual flow and the set flow, the controller outputs the speed signal to control the motor speed to achieve the purpose of accurate feeding. A linear pneumatic vibrating conveying chute is designed to continuously convey materials at a certain speed. The linear pneumatic vibrating chute has good linear control through the adjustment of leaf spring, amplitude and frequency, and can realize the automatic and safe measurement and transportation of solid energetic materials.

This paper presents research on a new high-efficiency, non-circular spinning method based on hypocycloid theory. The trajectory of the roller during the forming process was derived, and the non-circular spinning process was simulated in ABAQUS 2016/Explicit. The distribution of von Mises stresses and equivalent plastic strains after each spinning pass were analyzed. The spinning quality was also investigated. This research proves the feasibility of spinning the workpieces of a non-circular cross-section using hypocycloid theory. This new non-circular spinning method can be used in practice to produce workpieces with a specific geometry and to increase the rotational speed of the workpiece from 60–240 rpm to 600 rpm, thereby improving the efficiency by around 2.5 times while maintaining acceptable forming quality.

Pyrotechnic agent was a sensitive energetic material that produces explosion and combustion effects of pyrotechnics. It plays a decisive role in the safety, reliability and effectiveness of the weapon system. Because the current pyrotechnic agent is sensitive to high temperature, mechanical impact, and friction, there are many unsafe factors in its manufacture and use. The demand of continuous, automatic and environmental protection production technology for pyrotechnics in China is increasing. The traditional sensitive explosive can not meet these requirements, so it is necessary to accelerate the development of sensitive explosive to safeandinsensitive explosive.Therefore, in order to solve the key issues such as the safety and high-efficiency preparation of multi-component pyrotechnic agents, realize the environmental protection, safety and low-cost production of pyrotechnic agents. Based on the project design of a mixed propellant production system in an initiating explosive device factory, this research carried out the research on the safety automatic particle forming equipment for initiating explosive. It provides technical support for the innovation of weapons and equipment, and the upgrading of weapons and equipment manufacturing and production technology.

A non-linear finite element technique is used to study the progressive forming process of the sheet, and the elastic-plastic distribution is analyzed based on Abaqus/Explict. Finite element simulations of progressive forming with different process parameters were carried out to analyse the effects of the tool head diameter, layer feed and sheet properties on forming quality. The results show that increasing the tool head diameter or decreasing the layer feed will result in better sheet forming quality, and the influence of the tool head diameter on the sheet forming quality is greater than that of the layer feed, and the selection of materials and the selection of suitable process parameters are more conducive to the improvement of forming quality and forming efficiency.