Design And Research Of Flanging Equipment And Operational Frame Of 50-type Spiral Steel Silo

Steel silo is widely used in agriculture,industry and other fields,commonly used for granular,powder,liquid and other materials storage of vertical storage containers.The spiral steel silo has the characteristics of high automation,good sealing,light weight and high strength.It is now the most advanced steel silo.At present,the domestic general use of80 years from Germany to introduce imitation of the 40-type spiral steel silo forming equipment.The equipment can process the maximum plate thickness of 4mm,the maximum diameter of 30 m,the height of 16 m spiral steel silo.In order to break through the technical bottleneck,according to the production technical requirements,this thesis improved the forming process,and carried out a lot of numerical simulation analysis,and finally developed the 50-type spiral steel silo flanging equipment and operational frame.The equipment of this group can produce 3mm～5mm thick galvanized spiral steel silo,which improves the production technology level of spiral steel silo in China.The main research contents are as follows:(1)Analyzed the multi-roll continuous flanging process,completed the flanging pass design,and designed the detailed structure of the flanging unit and the running frame.The principle of related mechanism is introduced,and the mechanical analysis of important components is carried out.(2)Using the Explicit Dynamics module in ANSYS Workbench interface to simulate the flanging process numerically.The energy method can be used to determine the reasonable number of flanging stations conveniently.Based on the analysis of equivalent stress method,it is found that the peak stress at the bend Angle of station 6 is the largest.Based on the equivalent plastic strain method,the characteristics of each pass are analyzed accurately.Combined with the equivalent stress,the rationality of the design of the flanging pass is proved.This thesis innovates a comprehensive exploration method for the research of edge curling technology.By using energy growth rate analysis,it is found that this method can not only predict the energy consumption degree of the equipment,but also reflect the curling state of the sheet metal through the difference of energy growth rate.Combined with the change of equivalent stress and energy growth rate,it is found that the thickness of sheet metal has a great effect on the process of flanging.(3)The Static Structural module and Eigenvalue Buckling module under ANSYS Workbench interface are used to complete the simulation analysis of the operational frame structure.The virtual medium method is used to simplify the operational frame,the operational frame is linearized,and then the buckling analysis and nonlinear buckling analysis are carried out.The buckling analysis results show that the nodes of the running frame upper ring are most susceptible to buckling,and the possibility of overloading of local nodes is relatively small.Based on the energy method,the nonlinear buckling analysis is carried out,and it is found that buckling is easy to occur on both sides of the flanging machine and at the symmetric position about the axle center.Analysis and calculation show that the safety performance of the running frame structure is very high.Based on the research of the out-of-roundness theory,it is found that the structure is the most stable at β＜0.0015.It is suggested that the driving device should be added in the symmetrical position of the flanging equipment during construction(4)The test platform was built and tested for many times.The analysis of the collected pressure data proves that the design of roll pass is reasonable.It is found that the pressure value generated by folding 5mm steel plate is obviously larger by analyzing the pressure value change.The current data were collected,and it was found that the current variation trend was the same as the pressure value,which verified the correctness of the results.The current data shows that the motor current at station six is the highest.The selection of the motor should be determined by referring to station six.The experiment shows that the simulation results of this thesis accord with the experimental results,and the simulation process is correct.