Forging Process And Die Design And The Numerical Simulation Of Wetland Creeper Tread

Engineering machinery is an important part of the equipment industry. It’s widely used in the field of national defense, transportation, energy, water conservancy, construction, road and urban construction. In the last10years, the creeper tread market has received tremendous development with the growing application of engineering machinery in China. The wetland creeper tread is the key component of engineering machinery operated in the environment of wetland. Since its service condition is very bad, its hardness, tensile strength, yield strength, impact toughness and other mechanical properties must meet the requirements.At present, our wetland creeper tread is mainly produced by casting method which is prone to causing casting defects and leading to rough products, low accuracy and bad mechanical properties. Casting defects caused by the traditional casting process greatly affect the reliability and quality of the product. Thus the production capacity and product quality could not meet the market requirement. Therefore, it’s of great significance for our engineering machinery industry to study the forming process of wetland creeper tread and produce wetland creeper tread of high-quality.Based on the comprehensive analysis of the wetland creeper tread’s forming process, the paper proposed a new forging forming technology of wetland creeper tread. In place of casting process, the forging process can attain the goal of improving product quality, product reliability and service life.The paper analyzes the forging process, gets the calculation blank drawing, determines the equipment tonnage and gets the initial forging process of wetland creeper tread. Then the die cavity of pre-forging and finish-forging are designed on the basis of "Forming by pre-forging and finishing by finish-forging". The finite element model of wetland creeper tread’s forming process is established and the finite element software DEFORM-3D is used to simulate the pre-forging process. The flowing law of metal and load-stroke curve are predicted. The distribution of the stress and strain, temperature and the equivalent strain rate are obtained. Finite element models of different design schemes are designed and analyzed. The best forging process and the shape of preforming billet are determined by comparing the simulation results of different design schemes. The flowing law of metal, load-stroke curve and distribution of stress, strain, temperature and equivalent strain rate are obtained by simulating the pre-forging and finish-forging process. On this basis, the rolling forging die, pressing die and the whole forging die structure are determined.