Research On The Defect Of Air Nailer Body And Its Gating-Exhausting System

The air nailer body is a kind of pressure container, it is made from aluminium alloy by die casting process. Due to its complex construction, the improper design of gating and exhausting system leads to many defects. The traditional mold design method was based on trial-and-error, it was costly and time-consuming.This paper researchs on the gating system of the air nailer body by finite element simulation technology combined with optimal design method. Finally the molding quality is improved. The main work and achievement are as follows:(1) Molding the die casting process of the air nailer body, the simulation result shows that the kinds of defects and their distributed situation is correspond with the actual capacity. It proved that the simulation model is accurate.(2) Research on a gate location optimization algorithm. This algorithm is not only applicable for side gate, but also suitable for other forms of gating system. And the optimization model is unconstrained by the structure of the casting.(3) Calculate the ingate location of the air nailer body by using the established algorithm. Then simulate the die casting process of the optimized model, the result shows the filling and solidification process is much better than the former model.(4) Research on the die casting performance of replacing the material of air nailer body from ADC12to A356in order to meet the demand of the market. The result shows that its feasible.The gate location optimization algorithm established in this paper has much advantage in accuracy and feasibility. It is already used to optimiz the gating system of the air nailer body and achieve a better quality。...