Research Of The Automatic Transporting Mechanism For Automatic Steel Pipe Stacking Machine

Along with the fast development of Chinese economy,the demand for steel pipe is increasing rapidly.The traditional way of manual stacking can no longer fulfill the market demand for steel pipes.On top of this the generalsteel pipe stacking machine in the market has issues such as lowaccuracy buthigh energy consumption.In order to solve this problem,the transporting mechanism for the steel pipe stacking machine is designed and researched in this thesis.The main research contents of this paper are as follows:(1)ADAMS-based simulation analysis of the transporting mechanism for the steel pipe stacking machineThe model for the transporting mechanism is established in ADAMS to analyze thedynamics of steel pipe stacking machine.After the analysis,we haveobtained the moving profile over time for the hydraulic cylinderpropulsion force,the force on all the hinge points and the hydraulic cylinderpower.The moving curve and the maximum value for all the dynamic parameters can be clearly obtained from ADMAS/Post Processor.This has provided the theoretical bases for the optimization design of the mechanism,member strength check and section of the optimum electric motor.(2)ADAMS-based optimal design of the transporting mechanism for the steel pipe stacking machineBy applying the parametric modeling and analysis functions in ADAMS,we can build the parametric model of the transporting mechanism for the steel pipe stacking machine through parametric nodes.After analysis the appropriate design variables and value ranges have been selected and by performing optimization design to minimize the hydraulic cylinder power consumption,the optimized initial position for the Φ219 pipe stacking machine transporting mechanism have been located.After optimization,the maximum propulsion force of the hydraulic cylinder is reduced from 23137.7N to12227.9N,reduced by 47.2%.The average force is reduced from 1865.1N to 1364.76 N,reduced by 26.8%.The maximum power is reduced from 4627.5W to 2389.2W.The average power is reduced from 373.83 W to 316.95 W.(3)ANSYS-basedfinite element analysis and reliability analysisThe load distribution of key parts can be obtained through dynamic analysis from ADAMS.In order to verify the safety of the parts and components while working,the finite element analysishas been carried out using ANSYS to measure the maximum equivalent stress.Then the reliability of parts and componentsis analyzed and illustrated in the form of probability.The conclusion is that all the parts and components analyzed are able to meet the strength requirementswith more than above 99.99% reliability.Finally,amodal analysis has been carried outfor the mechanism,which found thatitsnatural frequencywas between 44.041-169.67 Hz.To avoid resonance,this frequency range should be avoided while working.