The Development Of High-temperature Plate Forming Testing Machine

With the emergence of high-strength material, relevant research increasinglybegun. Although the high-strength material has excellent properties, but its owncharacteristics make such materials more difficult to be formed, the application ofhigh strength materials was limited. Under high temperature conditions, the materialflow will enhance and the forming force will reduce. Therefore, study sheet formingat high temperatures has its research significance. Material’s superplastic properties isa research hotspot.Testing machines as a specialized tool, can test the mechanical properties ofmaterials, it’s an important quipment in materials science. The development of testingmachines needs adapt to the emergence of new materials, the traditional testingmachines can not meet the test of high strength sheet, so we need to develop a newtype testing machine use for sheet metal forming.Design a high temperature sheet metal forming testing machine to accomplishthe test we need to do. First through theoretical calculations to determine the overallstructure and basic dimensions, the critical components using ABAQUS finiteelement simulation software to check and optimize. Analysis large deformation andstress concentration portion to make the design more reasonably. Select theappropriate screw and motor according to the design. Completed thethree-dimensional design of the entire mode, ensure that the size of the entire machineis reasonable and feasible.Secondly, according to the various needs of the testing machines to designe thecorresponding hydraulic control system and control system. The hydraulic systemuses electro-hydraulic proportional control and electrical control part adopts PLCcontrol. Select and design appropriate detection unit and the control unit. Details thecontrol of the workflow of the entire system. Completed the drawing of the hydraulicsystem and the wiring diagram of hardware. Then analysis the application of the test machine, designed and installed afurnace to meet the demand for high-temperature conditions, the highest temperatureup to1200℃. The furnace use a well type structure, and use the molybdenum wire asa heating element. Adjust furnace temperature by PID control.The testing machine can use for different sheet metal forming test, only need toreplace the molds. Forming force and blank holder force is big enough for difficultyforming sheet metal. The accession of high-temperature furnace can facilitate thecompletion of the forming test under high temperature. The testing machine can testvarious sheet, wide range of application, it is the current trend of sheet metal testmachine and the main research directions.