附录英文翻译Lever body is a 500 t, 600 t, 800 t, 1300 t, 2000 t mechanical press on an important component mold clamping body parts, is the companys key project trial. Currently, foreign-made lever body is formed in the die forging hammer, forging internal quality and appearance than those of good quality. Forging abroad as domestic manufacturers do not have the condition, only in the free forging hammer on the shape, quality is hard to meet the design requirements. As the lever body parts surface more, if completely rely on forming, not only difficult process, and present material waste, processing cycles, high costs; In addition, as lever shaped body of work load is large, the mechanical performance requirements of materials higher. The process forming the lever body, the Central Department of fiber unreasonably difficult to guarantee quality of the work lever body. Thus, according to technical conditions existing programs to determine forging manufacturing with membranes and to identify with the local combination of forging and free forging methods.Using such a forging process has the following advantages:(1) leverage with the local body after the ring Die Department of fibers reasonable to ensure the quality forgings;(2), compared with the overall forging, die length, 1.9 times shorter, the module small size, low cost; (3) can gain leverage in the 400 kg pneumatic hammer directly on the molding, to improve efficiency. In contrast, the overall die forging hammer blow in the 400 kg pre-forging, pneumatic hammer, shaping the 3t, modules large high labor intensity, low efficiency; (4) plus the free use of local Forging Process, production preparation period is short, can quickly form a production capacity;(5) reduced cold difficulty, shortened processing cycles, saving processing costs. Therefore, the use of local plus free forging die forging process scheme can only guarantee the quality forgings, while head of production efficiency, and cost advantages. But the materials and manufacturing processes on the next blank requirements more stringent, through batch experiments, the final in the actual production has been successful.Punching device is a colossal, sophisticated national defense building, in particular the basis of currency such as the automotive industry to equip and strategic industry. Gear transmission system is a mechanical press stamping equipment, particularly in the important parts. In the mechanical press, the impact load is the main form loads, gear transmission system for the strength of this has important implications. Therefore, the impact of meshing gears under load by a lot of attention.Mechanical press mechanical transmission, mainly through pressure on the metals processing. The soil in the metal machining process is often accompanied by intense pressure changes, so that transmission system to withstand shock loading. Most mechanical press drive system composed by the gear. Undertaken in a variety of mechanical press processing, the soil pressure increase or a decrease with the trip, in the part of the work area will maintain a certain pressure. Which therefore legitimate soil shear processing the most intense pressure, measured experimentally in a series of measurement points to n times Lagrange interpolation polynomial curve fitting.Impact load is the stamping device suffered a major type of loading is an important factor affect the gear transmission system. This paper analyzes the form of stamping equipment load, and through the establishment of the impact load curve fitting expression. Hertz theory of elastic collision subsequently established on the basis of the impact loads of gear meshing force under the simulation model, simulation of the gear meshing force, and the impact of different peak loads meshing force were studied, and simulation results analysis. Simulation results show that the impact load of gear meshing force has a significant impact. Which showed a cyclical oscillation stable load characteristics, and impact loads type affected the form of the gear mesh, and Japan as the load increases, the amplitude of fast decay in the peak section, decay rate increases as the peak load speed. Meanwhile, the gear meshing force to enter and exit the work area at the stage of presentation of the oscillation peaks changes. Pressure characteristics of these oscillations for the gear strength greater impact. In the gear design process, according to the simulation results, combined with dynamic load calculation method to estimate can be more precise gear dynamic load factor, use factor and other gear strength calculation of key parameters, and thus 10 gear strength design is an important reference value. This is similar to the mechanical press to impact load-based gear transmission system, the design of the improved transmission system has an important reference.Although the product has the structure of the domestic mechanical press design has become relatively