Internal Force Planning of Multi-mechanism Cooperative for Variable Cross Section Roll-forming Machine

doi:10.3901/JME.2021.07.018

Abstract

Abstract: In order to solve the nonlinear variable load impact problem caused by complex elastoplastic deformation and springback of the sheet in variable cross section roll-forming manufacturing, a multi-mechanism cooperative internal force dynamic programming algorithm is proposed for the machine. The dynamic equations of the machine and steel sheet are derived by Lagrange method, and the joint dynamics equation including machine and steel sheet is established. In order to balance the nonlinear variable payload, the dynamic distribution of internal force is carried out based on the manufacturing equilibrium conditions. Taking the no squeeze of the steel as the optimization objective, the weighted pseudo-inverse method is used to optimize the distribution of internal force, and a new method for planning the coordinated operating force of the variable cross section roll-forming machine with multiple mechanisms and variable load is obtained. Finally, in view of the slippage problems in the machine actual processing, computer numerical calculation and simulation based on Matlab software. The simulation results show that when the payload of the steel changes, the internal force planning algorithm can make the drive shaft torque automatically adapt variable payload, and verify the correctness of the algorithm. The research will provide theoretical basis for intelligent control of variable cross section roll-forming machine.

Key words: variable section roll-forming manufacturing, multi-mechanism cooperative, internal force planning, variable payload

CLC Number:

TG156

HUANG Xiguang, YANG Ziqiang, LI Duanling, LI Qiang. Internal Force Planning of Multi-mechanism Cooperative for Variable Cross Section Roll-forming Machine[J]. Journal of Mechanical Engineering, 2021, 57(7): 18-25.

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