How to compensate the direction of the inner hole in wire cutting? [Zhikai CNC professional answer]

When cutting inner holes online, the diameter of the cutting tool and the characteristics of the cutting path will cause the size of the inner hole to be smaller. In order to compensate for this size deviation, the following methods can be adopted:

1. Molybdenum wire radius compensation:

Molybdenum wire radius compensation is a commonly used compensation method. When cutting an inner hole, the diameter of the molybdenum wire will cause the inner hole size to be smaller. By adding a compensation value of the molybdenum wire radius to the cutting path, the size of the inner hole can meet the design requirements. Molybdenum wire radius compensation can be set through the CNC programming software, and the cutting path is automatically offset by calculation based on the diameter of the molybdenum wire and the compensation value.

2. Cutting path compensation:

Cutting path compensation is a method of achieving compensation by adjusting the cutting path. When cutting an inner hole, the position of the cutting path can be adjusted to make the size of the inner hole meet the design requirements. Cutting path compensation can be set through the CNC programming software, and the cutting path is automatically adjusted based on the size of the inner hole and the compensation value.

3. Contour offset

In CNC programming, the shape of the inner hole can be adjusted by appropriately offsetting the contour of the inner hole. This method is suitable for situations where the size and shape of the inner hole need to be fine-tuned.

4. Post-cutting processing compensation:

After cutting the inner hole, compensation can be performed through subsequent processing. For example, drilling or reaming can be used to expand the size of the inner hole to meet the design requirements. The post-cutting processing compensation needs to be calculated based on the actual size of the inner hole and the design requirements to determine the compensation amount for processing.

5. Cutting speed and current adjustment:

Adjusting the cutting speed and current intensity can affect the melting and erosion during wire cutting. By adjusting these parameters, better internal hole processing results can be achieved.

In short, when cutting inner holes online, the selection of compensation direction is the key to ensure that the inner hole size meets the design requirements. By reasonably selecting the compensation method and direction, the problem of small inner hole size can be effectively solved, and the cutting quality and processing accuracy can be improved.

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