Home >> News

Common mould problems and maintenance methods

Jul. 13, 2020

The cutting edge caused by various reasons will have a certain influence on the quality of the workpiece.It is one of the most common repair contents in mold repair. The repair steps of the cutting edge are as follows:

Progressive Die

1. According to the situation of the caving blade, if the caving blade is very small, it is usually necessary to grind the caving blade with a grinder to ensure that the welding is firm and it is not easy to collapse the blade again. 


2. Use the corresponding electrode for welding. At present, we use D332 electrode for surfacing welding.Before surfacing welding, it is necessary to select the fixed datum plane, including the gap plane and the non-gap plane. 


3. Trim the non-clearance surface of the cutting edge (refer to the benchmark left in advance). 


4. Draw a line against the transition. If there is no transition part, roughen the clearance surface with the reference left in advance. 


5. Repair the clearance surface with the help of clay and other auxiliary grinding.In the repair process must be careful, start the press as slowly as possible, when necessary with the die height adjustment downward, in order to avoid the phenomenon of gnaw.


6. The blade clearance should be reasonable. For the steel plate stamping die, the one-side blade clearance should be 1/20 of the plate thickness.But in the actual operation process, you can use the blanking test to check the size of the clearance, as long as the burr of the parts after cutting meets the requirements.