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Repair method of 16-ton punch when the gap is large:

1, in trimming and punching process using punch motionless and dressing concave die method, and blanking process is based on the concave die, that is, the size of the concave die is unchanged, by dressing punch method. The above difference is to ensure that the product size will not be affected before and after repair;

2. Repair welding of this part with corresponding electrode (D332) to ensure the hardness of the cutting edge of the mould;

3. Find out the parts with large gap between the cutting edge and the workpiece;