1. Overcutting the part:
reason:
1. The knife is not strong enough, too long or too small. Bouncing the knife.
2. Wrong operation on the part of the operator.
3. The cutting margin is uneven. (For example: leave 0.5 on the side of the curved surface and 0.15 on the bottom)
4. Incorrect cutting parameters (such as: tolerance too large, SF adjustment too fast, etc.).
improve:
1. The principle of using a knife: it can be large but not small, it can be short but not long.
2. Add the corner cleaning procedure and try to keep the margin as uniform as possible (the margin on the side and bottom should be consistent).
3. Adjust the cutting parameters reasonably and round the corners with large margins.
4. Through the SF function of the machine tool, the operator can fine-tune the speed to achieve the best cutting effect of the machine tool.
2. Note:
reason:
1. The operator’s manual operation is inaccurate and the manual operation numbers are wrong.
2. There are burrs around the mold.
3. The centering rod is magnetic.
4. The four sides of the mold are not vertical.
improve:
1. Manual operations should be carefully checked repeatedly, and the points should be at the same point and height as much as possible.
2. Use a sharpening stone or file to remove the burrs around the mold, wipe it with a cloth and finally confirm with your hands.
3. Demagnetize the centering rod before centering the mold (a ceramic or other centering rod can be used).
4. Calibrate the meter to check if all four sides of the mold are vertical (significant verticality errors require a review plan with the installer).
3. Knife adjustment:
reason:
1. The operator’s manual operation is inaccurate and the manual operation numbers are wrong.
2. Tool is loose.
3. The blade of the flying knife is wrong (the flying knife itself has some errors).
4. There is an error between the R knife, the flat knife and the flying knife.
improve:
1. Manual operations should be carefully checked repeatedly, and the knife should be adjusted to the same point as much as possible.
2. When the tool is tight, clean it with an air gun or wipe it with a cloth.
3. When the blade of the flying knife needs to be measured on the toolbar and the bottom surface is smooth, a blade can be used.
4. A separate tool setting program can avoid the error between R knife, flat knife and flying knife.
4. Collision programming:
reason:
1. The safety height is not sufficient or not adjusted (the knife or chuck hits the workpiece during rapid feed G00).
2. The program list tool and the actual program tool are poorly written.
3. The tool length (blade length) and actual processing depth on the program sheet are written incorrectly.
4. The Z-axis depth recovery and the actual Z-axis recovery are not written correctly on the program sheet.
5. Coordinates are incorrectly defined during programming.
improve:
1. Accurately measure the height of the room and ensure that the safety height is above the room.
2. The program list tools should be consistent with the real program tools (try to use automatic program list or use images to generate the program list).
3. Measure the actual processing depth on the workpiece, and clearly write the length and tool blade length on the program sheet (generally, the length of the tool clamp is 2-3mm higher than workpiece and blade length is 0.5 to 1.0). MM).
4. Take the actual Z axis number on the workpiece and write it clearly on the program sheet. (This operation is usually written manually and must be checked several times).
5. Collision operator:
reason:
1. Depth Z axis tool setting error.
2. The number of points is reached and the operation is wrong (such as: unilateral recovery without feed radius, etc.).
3. Use the wrong tool (for example: use tool D4 with tool D10 for processing).
4. The program went wrong (for example: A7.NC changed to A9.NC).
5. The steering wheel turns in the wrong direction during manual operation.
6. Press in the wrong direction during manual fast forward (for example: -X press +X).
improve:
1. When making deep tool adjustment on the Z axis, you should pay attention to where the tool is set. (Lower surface, upper surface, analysis surface, etc.).
2. Check the number of strokes and operations repeatedly when finished.
3. When installing the tool, check it with the program sheet and the program several times before installing it.
4. The procedures must be followed one by one in order.
5. When using manual operation, the operator himself must improve his skills in operating the machine tool.
6. When moving quickly manually, you can first raise the Z axis to the part before moving.
6. Superficial precision:
reason:
1. The cutting parameters are unreasonable and the workpiece surface is rough.
2. The cutting edge of the tool is not sharp.
3. Tool clamping is too long and blade clearance is too long.
4. Chip removal, air blowing and oil flushing are not good.
5. Programming the tool feed method (you can try to consider down milling).
6. The part has burrs.
improve:
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 tightening the tool, the operator should keep the clamp as short as possible, and the blade should not be too long to avoid air.
4. For downward cutting with flat knives, R knives and round nose knives, the speed and feed settings should be reasonable.
5. The part has burrs: it is directly related to our machine tools, tools and tool feeding methods. Therefore, we need to understand the performance of the machine tool and compensate for the edges with burrs.
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
