CNC press brake tool selection

CNC press brake tool selection

CNC press brake in the actual production use will encounter a variety of problems, improper operation will reduce the service life of press brake tool, then how do we avoid such problems occur?

First, we have to select the press brake tool in the production out to meet the process requirements:.

1. A reasonable choice of heat treatment process. Heat treatment error is an important cause of early failure of CNC press brake tool. Mold heat treatment including steel forging after annealing, rough machining after high-temperature tempering or low-temperature tempering, quenching and tempering after finishing, electrical discharge, wire cutting after stress relief low-temperature tempering. Only a good match of hot and cold processing can ensure a good tool life.

2. A reasonable CNC press brake tool surface strengthening process. The main purpose of tool surface strengthening is to improve the tool surface wear resistance, corrosion resistance and lubrication performance.

3. Eliminate the stress generated in the electrical discharge processing. Before wire cutting machine processing, the internal of the blank is in a state of tensile stress due to quenching, and the thermal stress generated during wire cutting is also tensile stress, and the two stresses overlap, easily reaching the strength limit of the material and generating micro cracks, greatly shortening the life of the stamping die, thus improving the life of the press brake tool.

4. Good lubrication of the use of temperature. The working temperature of the CNC press brake tool can be divided into several states such as low temperature, room temperature or alternating temperature, the temperature has a great impact on the wear resistance of steel. Usually, below 250 degrees is mainly oxidation wear, that is, the relative friction between the tool butt or tool and workpiece, the formation of oxide film, repeatedly formed and stripped, the amount of wear is small. Between 250 degrees and 300 degrees shifts to bonded wear, where the wear reaches a maximum. Above 300 degrees to oxidation wear mainly, the wear amount has a tendency to reduce, but the temperature is too high when the tool hardness is obviously reduced, the bonding phenomenon aggravated, forming a large area of sintering and melt wear.