Research On Muti-Ram Warm Forging Forming Process Of H-Shaped Part

As the machinery industry, especially the rapid development of automobile industry and the intensification of international competition, spare parts design and production process of high precision, high performance, high efficiency, low cost and low energy consumption, has become the only way to improve competitiveness of products. Conventional machining technology and the traditional plastic processing technology have been difficult to meet the needs of development. Therefore, it should be the inevitable trend and the direction of development of plastic processing technology to produce the product which is close to the final shape(near net shape), and even to completely provide the finished parts(net shape). In this paper, the forming process of H-shaped part is simulated and studied by using the precision forming technology combined with the multi-ram forging and the warm forging.This paper presents a new multi-ram warm forging scheme for H-shaped part, combined with the characteristics of warm forging process to determine the relevant process parameters and process flow. The corresponding mold design was completed by using UG software. In this paper, using the finite element simulation software FORGE, the forming process of H-shaped part was analyzed by thermal mechanical coupled numerical simulation. The change law and distribution of the metal flow, temperature field, equivalent effect field and die stress field in the forming process was analyzed. By using the method of single factor rotating, the effect law of friction coefficient, initial billet temperature, die preheating temperature, the mold pressing speed of process parameters and mold shape parameters on the forming quality was analyzed. Finally, the reasonable range of the related process parameters and die parameters were determined, and the general rules of the influence of die forging angle and extrusion ratio G on the forming process of H-shaped part were summarized. These provide some reference value for the forming of similar parts.On the basis of the above research work, the lead test of H-shaped part was completed in the 6.5MN multi direction die forging hydraulic press. The experimental results show that the forging quality is very good, and the experimental results agree well with the numerical simulation results. It proves the rationality of the multi-ram warm forging scheme of the H-shaped part and the reliability of the simulation results. This provides important reference basis for practical production and manufacture.