How to maintain the punching die of CNC bus processing machine?

1. To ensure the best mold gap, the mold gap refers to the sum of the gaps on both sides when the punch enters the lower mold. Different plate thicknesses and different materials should be used for lower molds with different clearances. Choosing a suitable mold gap can ensure good punching quality, reduce burrs and collapse, keep the sheet flat, effectively prevent stripping, and extend the life of the mold.

2. Due to the pressure and heat during punching, the small particles of the sheet material will be bonded to the surface of the punch, resulting in poor punching quality. It can be polished with fine oilstone to remove the sticky material, and the polishing direction should be the same as the direction of the punch movement.

3. If you punch a lot of holes on a board, you should punch every other hole first, and then return to punch the remaining holes, which can effectively alleviate the stress accumulation during sequential punching in the same direction, and it will also make the front and back two sets of holes The stresses cancel each other out, thereby reducing the deformation of the sheet.

4. Try to avoid punching narrow strips. When the die is used to punch a sheet with a width less than the thickness of the sheet, the punch will bend and deform due to lateral force, and the gap on the other side will be too small or wear will increase. In severe cases, the lower mold will be scratched and the upper and lower molds will be damaged at the same time.

5. Timely sharpening can effectively extend the service life of the mold. When the edge of the mold wears and produces an arc with a radius of about 0.10 mm, sharpening is required. When sharpening, the grinding amount is 0.03~0.05mm each time, and the grinding is repeated until the punch is sharp. After sharpening, use oilstone to polish the cutting edge to remove burrs, and apply lubricating oil after demagnetization.

6. Regularly check the alignment of the upper and lower mold bases of the bus bar processing machine. If the centering of the punch die position is not good, the die will be quickly passivated and the processing quality of the workpiece will deteriorate. Check and lubricate the die holes and guide keys on the turntable, and repair them in time if damaged; clean the lower die seat of the turntable so that the lower die can be installed accurately, and check the wear of its keys or key grooves, and replace them if necessary.