CNC Machining and CNC Machine Tools, Mechanical Manufacturing Technologies

Problems and treatment methods of CNC processing

I. overcutting of work piece: Competitive CNC prototyping service China Manufacturer


The strength of the tool is not long enough or too small.

2, the operator is not operating properly.

3, uneven cutting allowance. (E. g.: 0.5 for the surface side and 0.15 for the bottom surface)

4, improper cutting parameters (such as: tolerance too large, SF setting too fast etc.


1, use knife principle: can big not small, can short not long.

2, add angle clearing procedure, spare as much as possible to stay even (side and bottom allowance to stay the same.

3, reasonable adjustment of cutting parameters, large margin around the corner.

4. Make use of the SF function of machine tool and fine adjust the speed of operator to make the machine tool cutting achieve the best effect.

II. In the middle:


1, the operator manual operation is not accurate, manual operation error.

2. There are burrs around the mold.

In the third part, the rod has magnetic field.

4. The four sides of the mould are not vertical.


1. Manual operation should be carefully checked over and over again, as far as possible in the same point in the same height.

2, the mold periphery oil stone or the file remove burr in wipes with the rag, finally with the hand confirmation.

3. Demagnetizing the mould before dividing the rod.

4. Check if the four sides of the die are vertical. (the vertical error needs to be reviewed by the fitter.

III. Knife:


1, the operator manual operation is not accurate, manual operation error.

2. Cutter clamping is wrong.

3. There are errors in the blade of the flying knife (there is a certain error in the blade itself.

There is an error between 4 / R knife and flat bottom knife and flying knife.


1. Manual operation should be carefully checked over and over again, the knife as far as possible at the same point.

2, when the tool is clamped, blow clean with the air gun or rag clean.

3, the blade on the flying knife to measure the pole, can be used when the bottom of the blade.

4. A single tool alignment program can avoid the error between R knife flattening knife and flying knife.

5, it is recommended to use the German BLUM cutter counter, which can automatically complete the knife alignment.

IV. Collision-programming:


1, the safety height is not enough or not set (fast feed G 00 when the knife or chuck hit the workpiece.

2, the tool on the program sheet and the actual program tool write wrong.

3, the tool length (blade length) and the actual processing depth write error on the program sheet.

4, the number of depth Z axis and actual Z axis are wrong.

5, programming coordinate setting error. Competitive CNC prototyping service China Manufacturer


1. Accurate measurement of the workpiece’s height also ensures that the safe height is above the workpiece.

2. The tool on the program list should be consistent with the actual program tool.

3. The depth of machining on the workpiece is measured, and the length of the cutter and the length of the edge are clearly written on the single program. (the length of the general cutter clip is 2-3MMM higher than the workpiece, and the length of the blade avoids the void is 0. 5-1. 0 MMN.

4, the actual number of Z axis on the workpiece, write clearly on the program. (this operation is usually a manual operation to be written over and over again.

V. collision operator:


1, depth Z-axis alignment error…

2, the number of bumps and the operation number error (for example: one-sided number does not have the feed radius and so on.

3. Use a wrong knife, eg one D 4, a D 10 knife.

4, the program went wrong (E. g.: a 7. NC, A 9. NC).

5. The hand wheel was swung in the wrong direction when manually operated.

6. Press the wrong direction when you feed quickly manually (E. g.:-X).


1. The depth Z axis must pay attention to the position of the knife. (bottom, top, analytical surface, etc.)

2, points in the number of contact and the number of operations after the completion of repeated inspection.

3, the clamping tool should be repeatedly checked with the program sheet and program in the installation.

4, the procedure must one by one go in order.

5, in the manual operation, the operator himself to strengthen the operation of the machine tool proficiency.

6. When moving quickly by hand, the Z axis can be raised to move above the workpiece.

VI. Surface accuracy:


1. The cutting parameters are unreasonable and the surface of workpiece surface is rough.

2. Cutting edge is not sharp.

3, the tool clamps too long, the blade avoid empty too long.

4, droppings, blowing, flushing is not good.

5, the programming tool way (can be considered as far as possible to follow the milling.

6, the work piece has burr.

7. It is suggested to use Japanese MST hot tool holder to improve machining accuracy.


1, cutting parameters, tolerance, allowance, speed feed setting to be reasonable.

2, the tool requires the operator to check and replace periodically.

3. When installing the cutter, the operator is required to clip as short as possible, and the blade should not be too long to avoid empty.

4, for flat knife R knife, round nose knife cutting, speed feed setting should be reasonable.

5, the workpiece has burr: our machine tool, cutting tool, the way of walking tool have direct relation. So we should understand the performance of the machine tool, carry on the mending knife to the edge with burr.

Competitive CNC prototyping service China Manufacturer

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