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This article is based on the plastic forming theory and process requirements, using the finite element method parts - mold - static analysis equipment system mechanical coupling, preload analysis and modal analysis, thus workpieces - mold - equipment systems, mechanical coupling design Analysis and optimization method. Precision plastic molding plastic processing technology development direction. Precision Forming premise of Precision Forming System, including Precision Forming, molds and equipment, which molds and equipment on the precision of the molding has a key role. The hydraulic machine body is an important part of the press, its carrying capacity and deformation size and its dynamic performance will directly affect the accuracy of the product and the life of the mold. Therefore, reasonable cost tooling and equipment in order to achieve the accuracy requirements for parts or zero, the necessary parts or parts precision parts - mold - equipment systems coupled stiffness constraints analysis, design and optimization , to Precision Forming system hardware sophisticated. The four sets of production line to the reactor containment mold forming hydraulic press THP22-4000 type as the basis of the plastic forming process system. Based on actual production, respectively, the sets of molds with THP22-4000 hydraulic press body coupled modeling, ANSYS Workbench software node coupled degrees of freedom coupled to the coupling model assembly parts, makes the the coupling model more realistic equipment, The simulation results more realistic. The coupled analysis showed: accounted mold workbench area or mold, clamping height increase reduced coupling model of stress concentration and maximum stress values ??decrease, press the smaller body deformation, the higher the coupling stiffness , while the higher the accuracy of the processing equipment. By modal analysis speed forging hydraulic press rack, rack sixth-order natural frequency and the inherent vibration mode of the dynamic parameters. The results show that: reasonable dynamic parameters THP22-4000 hydraulic press, does not occur resonance and noise pollution, in accordance with the design requirements; rack not only back and forth, up and down and left and right direction of the bending vibration and torsional vibration, the vibration will affect the rack strength, reduce stiffness, affect the the forging precision and the service life of the mold and hydraulic machines, Therefore, in the design process should be appropriate to increase the local stiffness to suppress these vibrations. The parts - mold - equipment systems mechanical coupling stiffness research, to achieve a multi-component, composite fuselage overall, comprehensive study. Solve the problem of contact between the parts. Solve the high production costs because the independent separation design of the press and mold of conventional design, due to press and mold, the hydraulic machine and the mold assembly in the machining error is larger, lower precision. The parts - mold - equipment systems mechanical coupling stiffness of the design and optimization of the design of the mold and hydraulic machines provide guidance. Reasonable to configure and optimize the structure of the forming mold and equipment in the the safe shell forming precision premise, the press and mold coupling stiffness analysis, lower production costs and higher economic benefits.
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