Reducing Punch Mold Wear: Essential Tips for Long-Lasting Tools

Mold Wear Of The Punch

Mold Wear Of The Punch

The wear of CNC punch dies is mainly reflected in the following points:

1. The mold alignment of punch equipment designed and processed before leaving the factory is poor.

Poor alignment of the die position hole can result in collisions and friction while using the die.

Currently, most CNC punch manufacturers in China can only control the die position alignment accuracy at 2 wires, and only a few of them can achieve an accuracy level of 1 wire.

The misalignment of the die position can lead to direct damage to the die.

2. The material performance of punch die is poor.

I won’t say much about this because during the process of use, molds run at high speeds, and those made with poor materials, subject to deformation or uneven heating, can all contribute to losses.

3. Insufficient lubrication.

Many friends might ask, “How do I lubricate the mold?”

During high-speed use, the mold is in prolonged contact with the die base or guide hole. As the mold moves up and down, the machine tool is likely to experience some inclined vibrations.

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Without proper lubrication, the mold can rub against the guide hole or die base, which could potentially lead to damage.

So, would you say the mold is at risk of being damaged?

4. The environment is too dirty.

If your punch is located in a dusty environment, the interior of your die will quickly accumulate dust within a few days. This can cause the die to become stuck and fail to rebound properly, and it can even be dangerous enough to break the punch.

5. The processed workpiece is too thick or too thin.

The designed punch has a maximum stamping thickness of 6mm.

If you intend to use it in an environment exceeding 6mm thickness for an extended period, it’s surprising that the die has not been damaged.

Standard punches are suitable for use with a thickness range of 0.8mm to 6mm.

6. The processing speed is too fast.

I know this. You blindly emphasize efficiency and run at high speed at full load all day. The mold of NC punch can’t carry it.

7. The optimization of processing procedure is not in place.

When multiple users employ the punch, the die may break, which typically occurs during edge processing.

As the die descends rapidly, only half or less of its cutting surface makes contact with the workpiece, causing uneven force distribution, which is a common reason for the die to break.


In short, there are many factors that contribute to die loss. To reduce this loss, it is important to focus on maintenance and rational use.

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By addressing some of the factors mentioned above, it is possible to make corresponding improvements that can help prevent or reduce damage.

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