Manhart How to judge whether the shear angle of the punching and shearing machine is adjusted correctly?

To judge whether the shear angle of the punching and shearing machine is adjusted correctly, you can check and test the following aspects to confirm. The following is a detailed point-by-point representation and summary:
1. **Shear surface quality**:
– Observe the straight steel cut after shearing, and ensure that the cut is flat, burr-free, and tear-free.
– If the cut is not flat, or there are burrs, tearing and other problems, it may mean that the shear angle is set incorrectly.
2. **Measure the shear angle**:
– If the punching and shearing machine is equipped with an angle measuring tool or device, the actual angle after shearing can be measured directly.
– Compare the actual measured value with the preset value to determine whether it is within the allowable error range. Generally, the error of the shear angle should be controlled within ±0.5°.
3. **Shearing accuracy test**:
– Use a standard template or ruler to measure the size of the straight steel after shearing to check whether it matches the preset value.
– If the size deviation is too large, it may indicate that the shear angle is improperly adjusted and further inspection and adjustment is required.
4. **Equipment operation status**:
– Observe the operation status of the punching and shearing machine during the shearing process, such as whether it is stable, whether there are abnormal sounds, etc.
– If the equipment is unstable or makes abnormal sounds, it may mean that the shear angle is not set properly and needs to be checked and adjusted.
5. **Trial cutting and testing**:
– Use straight steel of different materials and thicknesses for trial cutting to observe the shearing effect and cut quality.
– Through multiple trial cutting and testing, comprehensively evaluate whether the shear angle is adjusted correctly.
6. **Reference to shear angle standards**:
– Refer to the shear angle standards in sheet metal processing of different materials and thicknesses (such as a shear angle of 3° for cold-rolled steel plates and a shear angle of 4° for stainless steel plates, etc.).
– Select the appropriate shear angle according to the actual processing requirements and material properties, and make adjustments.
7. **Pay attention to equipment type and characteristics**:
– There may be differences in shear angle adjustment for punching and shearing machines of different types and brands.
– When making adjustments, refer to the equipment’s operating manual or consult the manufacturer’s technical support staff to ensure that the adjustments are made in the correct steps and methods.
In summary, judging whether the shear angle of the punching and shearing machine is adjusted correctly requires comprehensive consideration of the shear surface quality, shear angle measurement value, shear accuracy, equipment operation status, etc. Through multiple trial cuts and tests, comprehensively evaluate whether the shear angle is adjusted correctly, and make necessary adjustments and optimizations.