For the purpose of optimizing the dynamic characteristics of large forging equipment multilevel cartridge valves, according to the structure and principle of the Rexroth’s LC series cartridge elements, using AMESim simulation software, the influence of forging equipment cartridge valves switching characteristics be discussed respectively from the damping R2, the damping R1, the load pressure. The results show that the damping R1, the damping R2, the system pressure, and the work load to cartridge valves switching characteristics have certain effect. The research gives a method for analyzing and adjusting the cartridge valve response characteristics.

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It is vitally important to improve effects of error compensation for horizontal photoelectric theodolite and reduce production costs by executing rational control of verticality error of shafting. This paper analyzes the mechanism how the verticality error of shafting influences measurement precision of photoelectric theodolite considering the architectural characteristics of the frame of horizontal theodolite. Matlab software has been used to simulate pointing accuracy. Verticality error of shafting of horizontal theodolite has been detected. Measured verticality error of shafting is 37 and detection error is 10. Results of analysis and detection to be applied for error compensation can improve pointing accuracy of the theodolite.

Regarding the liquid-air hammer rod as the research object, the equivalent stress contour of the hammer rod has been obtained through transient dynamics simulation analysis of the hammer rod impact process by using finite element method. This paper has studied node rate response in different positions of the hammer rod to provide evidence for structure design of this kind of impact members.

In order to optimize the dynamic characteristic of hydraulic system of large forging equipment. It based on the model of one company of a certain aero-engine hydraulic system of hydraulic hammer forging, analysis the composition and working principle of hydraulic systems. Using simulation software AMESim, simulate the model of hydraulic systems and by changing the system pressure, flow and effect of the hammer-head stroke to explore this kind of switching characteristics of forging equipment’s hydraulic system. The result shows that this kind of simulation models can reflect the working status of hydraulic hammer well, and provide a technical reference for analysis and tuning equipment that with similar to forging equipment.