In mold factories, CNC machining centers are mainly used to treat the key parts of mold nuclei, inserts and copper cubes. The quality of the mold core and insertion directly determines the quality of the mold. The quality of copper treatment directly limits the impact of EDM treatment. The key to ensuring the quality of CNC treatment lies in the preparation before treatment. .
▌ CNC treatment process
1) Read drawings and the list of programs
2) Transfer the program corresponding to the machine tool
3) Check the program header, cutting settings, etc.
4) Determination of dimensions and process processing allowances on parts
5) a reasonable tightening of the parts
6) Precise correction of the parts
7) precise establishment of the coordinates of the part
8) Selection of the reasonable tool and cutting parameters
9) a reasonable tightening of tools
10) Safety test cutting method
11) Observation of the processing process
12) Adjusting the cutting parameters
13) Comments in a timely time of problems during the processing process and the corresponding staff
14) Testing the quality of the part after treatment
▌ Things to note before treatment
1) For new molds, processing drawings must meet the requirements and data must be clear; The processing drawings of new molds must have the signature of the supervisor, and each column of the processing drawing has been filled.
2) The room has a qualified brand of the quality department.
3) After receiving the order of the program, check whether the reference position of the part is consistent with the drawing reference position.
4) See each requirement on the program sheet and confirm whether the requirements of the program and the drawing are consistent.
5) According to the material and size of the part, judge the rationality of the selection of programmer’s tools for thick or light knife programs. Piece efficiency and precision.
▌ Precautions for tightening parts
1) When tightening the part, pay attention to the coder position and the length of extension of the nut bolts on the press plate.
2) The copper male is generally treated with locking plates.
3) When collecting several copper parts on a single board, check if the direction is correct and if each copper material interferes during treatment.
4) Clip the part according to the shape of the program sheet and the part of the part of the part. The graphics of the program sheet and the graphics of the dispersed parts drawings.
5) When you tighten the parts, it is necessary to check if the size of the part responds to the dimensions of the program sheet.
6) Before putting the part on the machine, clean the workbench and the bottom of the room. Use oil stone to repel terrifying and damaged positions when the table table and the room surface.
7) When you use the code of code, make sure that the code of code code is not injured by the knife and contact the programmer if necessary. At the same time, if the bottom is square, the coder must be aligned with the square to achieve the objective of the balance of force.
8) When using visor pliers, you must understand the depth of the treatment of the tool to prevent the tightening position from being too long or too short.
9) The screws must be included in the T -shaped block, and only part of the wire must be used. The nuts on the press plate should be used completely and only a few teeth should be collected.
10) When determining the depth Z number, you should clearly see the position of the list of programs and the data at the highest point of Z. After entering the data in the machine tool, you must check it again.
▌ Things to note when installing tools
1) The tool must be fitted safely and tight, and should not be too short in the handle.
2) Before each cable knife, check if the tool meets the requirements. If the tool holder collided.
3) When you encounter a very deep treatment depth, you can communicate with the position program.
4) When you use extended cable tips, you should particularly understand the depth of the tool, the length of the required tool and other data.
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6) Usually, the length of the tool is adjusted by the tip of the knife (if the knife is adjusted in special cases), and the procedural instructions must be carefully checked when setting the knife.
7) When the program is interrupted or readjusted, you must pay attention to the depth of the depth at the front.
8) If the rotary and disassembled cutting head is used for the water-soluble cutting liquid, it must be soaked with lubrication oil for several hours each half-house for maintenance, so that the internal parts of the cutting head can be lubricated and not worn.
▌ Things to note when correction of the parts
1) When you slide the table in the room, you must pay attention to the verticality, slide the vertical edge flat, then slide the vertical edge.
2) When the part is divided into two parts, it must be divided into two parts for verification.
3) Once the number of points has been crossed, the median must be checked according to the external dimensions and dimensions on the distributed parts diagram provided by the program sheet.
4) All parts must be divided into average method. If the number must be collected on one side in particular circumstances, it must be confirmed again by the production team before it can be adopted. After taking the number on one side, do not forget to compensate for the radius of the rod in the rear score.
5) Zero entrance to the center of the room must be the same as the three -axis center from the computer scheme of the workstation.
▌ Things to be noted during treatment
1) When the upper limit of the part is too large, use a large knife to eliminate tolerance, do not forget to be deep.
2) The most important thing in the treatment is the first tool, because if you operate and check carefully, you can know if the knife length, the diameter, the program, the speed, etc. are false, in order to avoid damaging the part, the tool and machine tools.
3) Try to cut the procedure as follows:
a) The height of the first point is the maximum height of 100 mm.
b) Check the “quick offset” to adapt to 25% and the power supply to 0%;
c) when the tool approaches (approximately 10 mm) the treatment surface, machine break;
d) Check if the remaining route and program are correct;
e) After having turned the power again, put a hand on the pause button, ready to stop the machine at any time and control the power speed of the other hand;
f) When the tool is very close to the surface of the room, it can be stopped again and the remaining race of the Z axis must be verified.
g) Once the processing and the cut are straight and stable, orders will be adjusted to normal.
4) After entering the program name, use a pen to copy the program name to the screen, then check the program sheet. On the program sheet.
5) In principle, NC technicians are not allowed to leave when the part is thick.
6) When you shed light in the middle, NC technicians should pay particular attention to the fact that they are not open when thick, in order to prevent the tool from crashing into this area.
7) Program cut. If the program is interrupted during treatment and it is a waste of time, the team leader and the programmer must be informed to modify the program and cut the part that has been executed.
8) Exception of the program. If there is a different situation in the program and you are not sure, you can lift it to observe the process, then decide on the next action.
9) The speed and rotation speed provided by the programmer during the processing process can be adjusted by the NC technician, if applicable. However, special attention must be paid to the speed of the small copper when exposed to thick, in order to avoid the relaxation of the part due to the oscillation.
10) During the treatment of the part, the NC technician must check with the scattered part scheme to see if there is an anomaly. are errors.
11) When you use tools over 200 mm long, you need to pay attention to the margin, the supply depth, speed and other problems to avoid swinging the knife.
12) If the diameter of the tool should be detected on the program form, the operator must be serious and responsible, and record the diameter of the test. the tool.
13) When the tool-tool is automatically functional or is free, the operator must go to the workstation to find out more about the remaining treatment and programming situation, prepare and grind the appropriate tools for the next treatment to be used to prevent closure.
14) Process errors are the main reasons why wasting time: incorrect use of inappropriate tools, erroneous treatment provisions, time lost in positions where there is no need for treatment or treatment not -Stack, inappropriate treatment conditions (at too slow speed, empty knife, the knife path is too dense, the power supply is too slow, etc.), the above events can be connected by programming and other connections when The above events occur.
15) During the processing process, you must pay attention to the wear of the tool and you must replace the tool or the tool appropriately.
▌ Things to note after treatment
1) Confirm that each program and each instruction required by the program form have been completed.
2) Once the treatment is completed, it is necessary to check if the external shape of the part meets the requirements. manner.
3) Check if there are anomalies in each position of the part.
4) The team leader, the programmer and the production team leader must be informed when the large part is deleted.
5) Pay attention to safety when deleting the part, especially when removing the larger part, protect the part and machine NC.
▌ Distinguish and process the machining precision requirements
Essential surface quality:
1) Modular and encrusting blocks
2) Copper male
3) Avoid empty spaces at the level of the head holes strap, etc.
4) Eliminate the phenomenon of shock marks
Brilliant size:
1) The measurable size must be strictly self-truth after treatment
2) During the long -term treatment, the loss of tools must be taken into account, in particular the sealing position and other parts.
3) New carbide cutting tools should be used as much as possible in polishing
4) Determine the module after extraction according to treatment requirements
5) Confirmation of quality after treatment, quality, etc.
6) Control the loss of tools during the treatment of the sealing position according to the processing requirements
▌ Transfer
1) Confirm the working conditions of working time, including treatment conditions, mold conditions, etc.
2) Confirm if the equipment is working properly during work.
3) Other transfer and confirmation, including drawings, program sheets, tools, measurement tools, lighting, etc.
▌ Organization of the workplace
1) Implement according to the requirements of 5S.
2) Tools, measurement tools, lighting, parts, tools, etc. are arranged carefully.
3) Cleaning the tool-tool.
4) Clean the work field.
5) Turn into the warehouse of processed tools, inactivity tools and measurement tools.
6) The treated documents are sent to the inspection or corresponding service.
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