Thread rolling plate

The processing technology of hexagon bolt includes blanking, preupsetting, upsetting and trimming.The edge cutting die plays the role of edge cutting and shaping.The trimming process is a process of shearing, squeezing and tearing.

The front face of the mould is loaded repeatedly and dynamically, and shaoxing screw plate is subjected to repeated impact load.There are strong shearing, extrusion and sliding friction between the back face of the die and the workpiece (bolt).In addition, the deformation and friction of the hardware workpiece produced a lot of heat and mold temperature rise.

Therefore, the edge cutting die is required to have high strength, high hardness and high wear resistance, but also need to have enough plasticity and a certain degree of red hardness.Corresponding to this, the main failure forms of this kind of die are impact fatigue spalling and wear, in addition to the edge crack, Angle crack, upsetting collapse and other abnormal failure.