According to the size,structure,and material thickness of hot pot,the stamping process was analyzed,and three moulds were designed including a compound die for"blanking+first form-ing+drawing",the second forming die,and a side perforating die.In the compound die,the first forming for 120° angle was arranged before the drawing process since the hypotenuse of the 120° angle could be regarded as the holder of the drawing process.A moving roof was designed in the lower die for the second forming with 70° angle,and together with the forming punch of the upper die to press the bevel of the 120° angle,preventing the bevel of the 120° angle from deforming.In the"blanking+first forming+drawing"compound die and the second forming die,rubber pads were set in the bottom of the forming part of the lower die.The upper die moved down,the elastic generated by the compressed rubber pads could hold the material tightly,while leaving space for the downward movement of the upper die to prevent the die from sticking.
万方数据
维普
