Dynamic analysis method for eight-connecting-rod mechanical press

Abstract

The invention provides a dynamics analysis method for an eight-connecting-rod mechanical press. The dynamics analysis method comprises the following steps: simplifying a transmission mechanism model;carrying out stress analysis on each rod of the transmission mechanism to obtain the stress condition of each rod; listing a virtual work equation by utilizing a virtual work principle according to the stress condition of each rod; substituting kinematic parameters and press tonnage information into the virtual work equation and performing solving to obtain a crank torque solving curve; performingsimulation processing according to the three-dimensional model of the transmission mechanism to obtain a crank torque simulation curve; verifying whether the solving curve of the crank torque is consistent with the simulation curve or not, and if yes, respectively outputting crank torque solving parameters. The method adopts the virtual work principle to perform dynamic analysis to obtain the crank torque, is simple to solve, and improves the calculation efficiency.

Description

technical field [0001] The invention relates to the field of mechanical transmission, more specifically, it relates to a dynamic analysis method of an eight-link mechanical press. Background technique [0002] Mechanical press is a typical mechanical product with many varieties and small batches. It is generally designed on the basis of the whole machine, and the mechanical press is made to order. Each press needs to be redesigned according to the customer's order requirements. However, some orders can be realized only by fine-tuning the design parameters on the basis of mature models. [0003] In solving the design parameters, a dynamic analysis of the mechanical press is required. The purpose of dynamic analysis is to solve the dynamic parameters, such as the driving force, such as crank torque, to determine the power required by the motor and to select the appropriate motor; to find the production resistance, according to the driving force on the original moving part De...

AI Technical Summary

Problems solved by technology

The matrix method needs to know the moment of inertia of each component, and the column matrix solution is time-consuming, and it is not easy to find out the source of the error, because there are many equations, each equation needs to be checked carefully, and it takes a lot of work to find out the error

The simulation method, such as using the virtual prototype Adams for simulation, needs to import the model from the outside, then simplify the model, and only keep the moving components. Other parts such as fasteners and supports can be deleted, and then add kinematic pairs, drives, Finally, the simulation is solved. This method needs to establish a model in an external software (such as Solidworks, Pro / E), and then import it into Adams for analysis. However, the imported model cannot be parameterized in Adams. For the rod mechanism, it needs to be modified in the external software and then imported into Adams for analysis, which is cumbersome

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