Reason for the problem:
1. The operator is inaccurate when it is manually operated
2. There are burrs around the mold
3. The centring rod is magnetic
4. The four sides of the mold are not vertical
Improve methods:
1. Manual operation should be carefully checked repeatedly, and the points should be at the same point and the same height as far as possible.
2. Use a whetstone or a file to deburr around the mold, wipe it with a rag, and finally confirm by hand
3. Demagnetize the centring rod before centring the mold (the ceramic centring rod or others can be used)
4. Check whether the four sides of the mold are vertical by the calibration table (the verticality error is large, and the plan should be reviewed with the fitter)
Reasons for poor surface accuracy:
1. The cutting parameters are unreasonable and the surface of the workpiece is rough
2. The cutting edge of the tool is not sharp
3. The tool clamping is too long, and the blade avoidance is too long
4. Chip removal, air blowing, and oil flushing are not good
5. Program the cutting method, (you can consider down milling as much as possible)
6. The precision CNC machining workpiece has burrs
Improve methods:
1. Cutting parameters, tolerances, allowances, speed and feed settings should be reasonable
2. The tool requires the operator to check and replace it from time to time
3. When clamping the tool, the operator is required to clamp as short as possible, and the blade should not be too long to avoid the air
4. For the lower cutting of flat knife, R knife and round nose knife, the speed and feed setting should be reasonable
5. The workpiece has burrs: it is directly related to our machine tool, cutting tool, and cutting method. It is necessary to understand the performance of the machine tool and make up for the edge with burrs.
