Pay attention to some details in CNC processing of aluminum parts can avoid quality problems of aluminum parts and improve the production efficiency of enterprises. What should we pay attention to before CNC processing?
Pay attention to some details in CNC processing of aluminum parts can avoid quality problems of aluminum parts and improve the production efficiency of enterprises. What should we pay attention to before CNC processing?
CNC machining of aluminum shell
1. For the new die, the processing drawing should meet the requirements and the data should be clear; the processing drawing of the new mold should be signed by the supervisor, and all columns of the processing drawing have been filled in.
2. The workpiece has the qualification mark of quality department.
3. After receiving the program sheet, check whether the workpiece reference position is consistent with the drawing reference position.
4. Check every requirement on the procedure list and confirm whether the program is consistent with the requirements of the drawing. If there is any problem, you must work with the programmer and production team to solve the problem.
5. According to the material and size of the workpiece, judge the rationality of the selection of the tool for the program of roughening or smooth cutting. If the application of the tool is found to be unreasonable, the programmer should be informed immediately to make corresponding changes, so as to improve the processing efficiency and machining accuracy of the workpiece.
In the process of using CNC to process aluminum parts in normal production, the following contents should be paid attention to:
1. When the surplus on the top surface of the workpiece is too large, when using a large knife to manually remove the surplus, remember not to use the depth of the gong.
2. The most important machining tool is the first tool. If you operate and check carefully, you can know whether the tool length compensation, tool diameter compensation, program, speed, etc. are wrong, so as to avoid damaging the workpiece, cutter and machine tool.
3. Try the cutting procedure as follows:
a. The height of Di point is the highest elevation of 100 mm, and the eye is used to feel whether it is correct;
b. Control “fast move” to 25% and feed to 0%;
c. When the tool approaches (about 10 mm, machining surface), stop the machine;
d. Check whether the remaining stroke and program are correct;
e. After starting the machine again, put one hand on the pause button to stop the machine at any time, and the other hand controls the feed rate;
f. When the tool is very close to the workpiece surface, it can be stopped again, and the remaining stroke of Z axis must be checked.
g. After the machining and cutting is smooth and stable, adjust the control back to normal state.
4. After inputting the program name, use a pen to copy back the program name on the screen, and then check it with the procedure sheet. When opening the program, pay attention to check whether the tool path size in the program is consistent with the procedure sheet, and fill in the file name and cutter diameter size in the signature column of the process sheet immediately. It is forbidden to fill in the file name and cutter diameter size after or before the process.
5. In principle, NC technicians are not allowed to leave when the workpiece is rough. If it is necessary to leave due to tool change or assistance in adjusting other machine tools, please ask other NC team members or come back regularly for inspection.
6. When making the middle light, the NC technician should pay special attention to the place that is not opened during the roughening to prevent the cutter from hitting this area.
7. Program cutting. In case of interruption of the program during processing and it wastes too much time to start from the beginning, the team leader and the programmer shall be informed to modify the program and cut out the part that has been passed.
8. Program exception. In case of abnormal conditions of the program, and not sure, you can hang high to observe the process, and then decide the next action.
9. NC technicians can adjust the speed and speed provided by the programmer according to the actual situation. However, special attention should be paid to the fact that the speed of small pieces of copper can not be turned fast when it is exposed to rough, so as to avoid the loosening of workpieces due to oscillation.
10. During the process of workpiece processing, the NC technician should check with the spare parts drawing to see if there is any abnormal condition. Once the two do not match, they must stop the machine immediately and inform the team leader to check whether there is any error.
11. When using the tool with a length of more than 200 mm, it is necessary to pay attention to the allowance, feed depth, rotation speed, travel speed and other issues, so as to avoid tool swing. At the same time, the travel speed of the corner position should be controlled.
12. If the tool diameter is required to be detected on the program sheet, the operator must be responsible for it carefully, and record the diameter of the test. If it is beyond the tolerance range, it should be immediately reported to the team leader or tool change.
13. When the machine tool is in automatic operation or free, the operator should go to the workstation to understand the remaining processing programming, prepare and grind the appropriate tool for the next machining standby, so as to avoid shutdown.
14. Process error is the main reason for waste of time: wrong use of inappropriate tools, wrong processing sequence, waste of time in the position without processing or non computer processing, improper processing conditions (too slow speed, empty tool, too dense tool path, too slow feed, etc.), when the above events occur, it can be connected with programming, etc.
15. In the process of machining, we must pay attention to the wear condition of the cutting tool. We should change the cutter grain or the tool properly. After changing the cutter grain, we should pay attention to whether the contact boundary of the machining is consistent.
