Common problem

Reason

Improvements

Overcutting the workpiece

1. The knives, the tool strength is not too long or too small, resulting in the tool knives.

2. The operator is not working properly.

3. The cutting allowance is uneven (for example, 0.5 on the side of the curved surface and 0.15 on the bottom)

4. Improper cutting parameters (eg too tight tolerance, SF setting too fast, etc.)

1. Principle of using a knife: It can be big or small, short or not long.

2. Add the clear angle program, and leave the balance as even as possible (the side and the bottom surface are the same).

3. Adjust the cutting parameters reasonably and round the corners at the large margin.

4. Using the machine tool SF function, the operator fine-tunes the speed to achieve the best results for machine cutting.

Minute problem

1. The operator is not accurate when operating manually.

2. There are burrs around the workpiece.

3. The centering rod is self-contained.

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

1. Manual operation should be carefully checked repeatedly, and the points should be at the same height as possible.

2. Deburr the oil around the workpiece and wipe it off with a scouring pad. Finally, confirm with your hand.

3. Before the workpiece is divided, the rod will be demagnetized first (the ceramic can be used to separate the rod or other).

4. Check whether the four sides of the workpiece are vertical (the perpendicularity error needs to be confirmed within the acceptance range).

Tool setting problem

1. The operator is not accurate when operating manually;

2. The tool is clamped incorrectly;

3. The flying blade on the flying knife is wrong (the flying knife itself has a certain error);

4. There is an error between the R knifefish flat-bottom knife-level flying knife;

1. Manual operation should be carefully checked repeatedly, and the knife should be at the same point as much as possible;

2, the overall assembly is blown with a wind gun or wiped clean with a scouring pad;

3. The blade on the flying knife should measure whether the diameter of the arbor meets the requirements, and a blade can be used when the bottom of the light is used;

4. A separate processing program can avoid the error between R knife, flat bottom knife and flying knife;

Collision (programming)

1. The safety height is not enough or not set (the chuck collides on the workpiece during rapid traverse);

2. The tool on the program list is wrong with the actual program tool;

3. The tool length (blade length) on the program sheet and the actual machining depth are wrong;

4. The depth Z-axis fetch and the actual Z-axis fetch are wrong on the program list;

5. The coordinates are set incorrectly during programming;

1. Accurate measurement of the height of the workpiece and also ensure that the safety height is above the workpiece.

2. The tool on the program list should be consistent with the actual program tool (try to use the automatic program list or use the picture to output the program list).

3. Measure the depth of the actual machining on the workpiece, and write the length of the tool on the program sheet. The length of the tool is 2-3mm higher than the program, and the length of the blade is 1-2mm.

4. The actual Z-axis number on the workpiece is written clearly on the program sheet. (This operation is generally manual, to check clearly)

Collider (operator)

1. The depth Z axis is incorrect for the knife;

2, the number of points in the middle of the touch is incorrect (such as the unilateral fetch without deducting the tool radius, etc.);

3, use the wrong tool (such as: D4 knife used to D10 processing);

4. The procedure is wrong (eg A9.NC goes A11.NC);

5. When the manual operation is performed, the handwheel is turned in the wrong direction;

6. Press the wrong direction during manual rapid traverse (eg: -X press +X).

1. The depth Z-axis tool must pay attention to the position of the knife. (bottom, top, analysis, etc.);

2. Repeat the inspection after the number of operations in the middle of the touch;

3. When installing the tool, repeat it with the program and program check and then install it;

4, the program should follow the order one by one;

5. When using manual operation, the operator must enhance the operational proficiency of the machine tool;

6. When moving manually, you can first raise the Z axis to the top of the workpiece and move it

Curved surface accuracy

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

2. The cutting edge of the tool is not sharp.

3. The tool is too long and the blade is too long.

4. Chip removal, blowing, and bad oil.

5. Program the way of the knife, (you can consider going straight down as much as possible).

6. The workpiece has burrs

1. Cutting parameters, tolerances, margins, and speed feed settings should be reasonable.

2. The tool requires the operator to check it from time to time and change it from time to time.

3. When installing the tool, the operator should be as short as possible, and the blade should not be too long.

4. For the flat knife, R knife, round nose knife undercut, the speed feed setting should be reasonable.

5. The workpiece has burrs: the root of our machine tools, tools, and the way of the knife is directly related. So we need to understand the performance of the machine and make a knife for the burr.

Crushing

1. The feed rate of machining is too fast;

2. Feeding is too fast at the beginning of machining;

3. The tool is not clamped, causing the tool to loosen;

4. There is no fixed clamp after the workpiece is on the machine, which causes the workpiece to move during the machining process;

5. The rigidity of the tool is insufficient;

6. The cutting edge of the tool is too sharp;

7. The rigidity of the machine tool and the tool holder is insufficient;

1. Slow down to a suitable feed rate;

2. Slow down the feed rate at the beginning of cutting;

3. Clamp the tool and then machine it;

4. Clamp the workpiece and then machine it;

5, with the shortest knife allowed, the depth of the handle clip, and try to cut down;

6, change the fragile cutting edge angle, one edge;

7. Use a rigid machine tool and tool holder;

abrasion

1. The speed of the machine is too fast when processing

2. The workpiece is a hardened material

3. The swarf will adhere to the workpiece during processing;

4. Improper feed rate (too low)

5. Tool cutting angle is not suitable

1. Slow down the processing revolution and add enough coolant;

2, using advanced tools, tool materials, increase the surface treatment

3. Change the feed rate, chip size or clean the chips with cooling oil or air gun

4, increase the feed rate, try down milling

5, change to the appropriate cutting angle

Vibration pattern

1. Processing feed and cutting speed are too fast;

2. Insufficient rigidity (machine tool and tool holder);

3. The back angle of the cutting face of the tool is too large;

4. The workpiece is not fully clamped and loose;

1. Correct feed and cutting speed;

2. Use a better machine tool and tool holder or change the cutting conditions;

3, change to a smaller back angle, processing the edge belt (with a stone grinding a blade);

4. Clamp the workpiece;