Brake tool repair and resharpening is an essential process for sheet metal processing plants to repair worn molds in the later stages.
No manufacturer will continue to use a press brake tool set without repairing and regrinding it for several years, which is harmful to both the press brake and the molds.
The main cause of press brake die wear is due to the sheet metal processing process. Local bending leads to wear of the die at the fixed point due to bending pressure over a long period of time. Excessive pressure can also scratch the lower die, which will further increase the degree of wear on the upper and lower dies.
The best solution to deal with the wear caused by local bending is to process multiple parts at the same time, which can distribute the pressure in the press brake and avoid damage to the die caused by pressure concentration.
Under what circumstances should the press brake die be polished?
When the angular deviation of the bent part is significant or the surface roughness is large, it is important to repair the mold immediately to change its surface and extend its service life.
Before starting processing, the sheet metal operator must inspect the upper and lower dies of the press brake. If there are visible signs of wear on the surface, the matrix must be repaired.
Minimizing the number of times the die is ground and the number of cycles it goes through will help extend its life, improve part quality, reduce the load on the machine tool, and increase the product qualification rate.
How to rectify the press brake mold?
There are several mold grinding methods, the most common method is to place the mold in a special fixture and then use a precision grinding machine for processing. This is particularly true for arc molds (R molds) and forming molds, which require the use of high-precision grinding wheels and mold repair tools.
During each grinding session, it is important to maintain a tool clearance of 0.03 mm to 0.05 mm.
Repeated grinding not only fails to completely process the mold, but also causes significant damage to the mold and is generally not recommended.
It is best to make appropriate corrections in most rectifiable areas and then perform final fine grinding, which helps improve the accuracy of the NC press brake die and facilitates installation and commissioning.
Conclusion
In conclusion, proper regrinding of bending machine dies is an important process for sheet metal manufacturing companies. Improving the accuracy and useful life of dies is another way to increase company benefits.
