The CNC programming department of the mold factory formulates clear processing techniques and standards, and performs standardized operations in the production process, which can improve work efficiency and reduce errors.
01
Former mold kernel
1. Hot nozzle position
1) Dimensions with assembly requirements must be based on the number.
2) Plane: The machining program is made according to the size, and the CNC operator checks the table according to the tolerance of the drawing size.
3) Side: Compensation is started in the processing program, and a margin of 0.02mm is left for trial matching on one side. The operator uses a needle gauge to fit tightly, and the tolerance is guaranteed to be within 0.015~0.005mm on one side. Other dimensions are based on the dimensions of the 3D drawing. .
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2. Insert buckle
The side of the insert buckle needs to be processed according to the program, and the size is accurate; while the depth (Z value) of the insert buckle is determined according to the size, the operator uses a calibration meter to measure the depth, and the tolerance requires a depth of 0.01mm.
3. Glue size
0.02mm should be left on one side of the finishing program for all glue positions (except for special cases), and 0.15mm should be left on one side with fire pattern requirements, which is used to process EDM patterns.
4. Penetrating and bumping
Under normal circumstances, the front mold core is the exact size, and the rear mold core has a margin.
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5. Side lock
The bottom depth (Z value) of the side lock position shall be the accurate size, and the side processing program of the side lock position needs to start the compensation and leave 0.02mm for trial fitting on one side. Inside.
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02
Houmoren
1. Row slot
The depth (Z value) of the positioning groove must be determined according to the size of the drawing. The operator uses a comparison table to measure the number according to the tolerance of the drawing, and the two sides of the positioning groove are processed according to the size of the drawing. The program processing needs to be compensated with a margin of 0.02mm on one side Quantitative trial matching, the operator uses a block gauge to tightly match, and the tolerance is guaranteed to be within 0.015~0.005mm on one side.
2. Insert buckle
The side of the buckle of the insert must be calibrated according to the size of the drawing, and the depth (Z value) of the bottom must be calibrated according to the size. The operator uses a calibration meter to measure the number, and the tolerance requires a depth of 0.01mm.
3. Mold frame hole position (hidden CORE position)
The programmer needs to open the compensation to leave a margin of 0.02mm on one side when doing the light knife program. The operator who starts the compensation will measure according to the size of the drawing.
4. Glue size
All glue positions have a margin of 0.02mm for finishing (except for special requirements).
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5. Penetrating and bumping
Under normal circumstances, an extra margin of +0.02~0mm should be left for the rear mold, and the position of the rear mold core matching position should be determined according to the size, and more margin should be left for the position of the rear mold core matching the row position.
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03
Moren Convex CORE
1) Leave a margin of 0.5mm on one side during rough machining, and when the mold frame inserts processed to the bottom use rough machining convex CORE, leave 10mm for the straight body position of the bottom, which is used for the operator to check whether the rough machining is loose and needs to be quenched Leave 10mm straight at the bottom of the special-shaped convex CORE for finishing after quenching.
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2) Leave 0.02mm for all glue positions during finishing (except for special requirements), and leave +0.02~0mm for the position of penetration.
3) Convex CORE shape finishing, the programmer opens the compensation to leave a margin of 0.02mm on one side when doing the light knife program, and the operator measures the tolerance on one side 0~-0.005mm according to the drawing size, which is convenient for assembly.
4) For details on the centering of mold core inserts (convex CORE) with irregular shapes, see the latter part for details.
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04
rows, inserts
1) When receiving the workpiece, the programmer should measure the external dimensions of the workpiece to avoid problems caused by the division and unilateral collision. The programmer needs to discuss with the operation team according to the shape of the workpiece, and adopt a safe clamping method and a collision method. See later section for details.
2) The row position and the front and rear mold cores have a matching position, and an extra 0.02mm margin is required for the row position for FIT.
3) All glue positions are left 0.02mm on one side (except for special requirements).
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05
Inclined roof
According to the shape of the workpiece and discuss with the operation group, use a safe clamping method and a touch method, and leave 0.02mm on one side of all glue positions (except for special requirements).
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06
Mold processing
1. Mold base
1) The base character (chamfer) on the drawing of the mold base must be consistent with the datum on the mold base. In order to avoid misunderstanding and confusion in processing, the datum side should face its own direction when programming.
2) For the processing positioning of all templates, the processing coordinates are established with the center of the guide post hole near the reference angle as zero.
3) Definition of Z value touch number: For all templates to be processed forward and reverse, the number of touches at the bottom of the mold base is taken as zero. For workpieces with special requirements, the programmer needs to explain clearly to the relevant personnel, and clearly indicate the mold on the program sheet. The zero position of the embryo.
2. A board
1) Finishing of the mold frame. When the program processes the bottom of the mold frame, the size must be made according to the size of the drawing. The CNC operator uses a calibration meter to measure the number according to the tolerance of the drawing. The tolerance is +0.01~+0.02mm. The frame edge finishing program needs to be opened to compensate for a 0.02mm allowance on one side. The operator uses a block gauge to fit tightly according to the size of the drawing. The tolerance Guaranteed within 0.02 ~ 0.01mm on one side.
2) The side lock position is made according to the bottom of the figure, and the side block gauge is tightly matched, and the tolerance is guaranteed to be within +0.015~-0.01mm on one side.
3) The bottom of the insert groove is measured accurately, and the side is tested with a block gauge for tight fit. The tolerance is guaranteed to be within +0.015~ +0.01mm on one side.
4) Other dimensions such as shovel chicken troughs are processed according to the drawings.
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3. Board B
1) Finish machining of the mold frame, the program processes the bottom of the mold frame to make accurate dimensions, and the CNC operator uses the comparison table to measure the number according to the tolerance of the drawing. The operator needs to use a block gauge to fit tightly according to the size of the drawing, and the tolerance is guaranteed - within 0.02~0.01mm on one side.
2) The depth (Z value) of the groove bottom of the mold frame row position needs to be processed to the number according to the drawing size. The operator uses the calibration table to measure the number according to the tolerance of the drawing. The tolerance is +0.01~+0.02mm. Leave 0.02mm for trial matching, and the operator needs to use a block gauge for tight fitting, and the tolerance is guaranteed to be within +0.015~+0.01mm on one side.
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4. Ejector panel:
1) When deep machining the position of the countersunk head of the thimble, the depth needs to be 0.02mm deep. The operator uses a dial gauge to measure the number, and the tolerance is 0.02~0.01mm, and the side of the countersunk head of the thimble needs to be machined to size.
2) The processing size of the slanted top base assembly position, the bottom of the thimble panel is used as the standard size during program processing, the operator uses a comparison table to measure the number, and the side processing size is in place.
3) Other positions are processed according to the size of the 3D drawing.
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5. Thimble bottom plate:
1) For the size position required by the assembly of the insert, the operator needs to use a block gauge to fit it tightly, and the other positions are processed according to the size of the 3D drawing to make the exact size.
2) C board: process the accurate size according to the size of the 3D drawing, and use the gong bed group to print the A code in the positive direction to select the processing surface and the processing direction gong model number and character code.
3) Nameplate: Engraving according to the requirements of the 3D drawings.
4) Upper fixed plate: The nozzle position has the size required for assembly, and the precise size needs to be processed on the bottom of the upper fixed plate by a program. The operator needs to use a calibration meter to measure the number, and the side processing needs to be compensated, leaving 0.02 for one side of the program mm, the operator needs to use a needle gauge to ensure that the single side is within +0.015~+0.01mm, and other dimensions are processed according to the 3D drawing.
5) Lower fixing plate: There are dimensions required for the assembly of inserts. The bottom of the lower fixing plate needs to be processed to the exact size, and the sides need to be tightly matched with block gauges. Other dimensions should be processed according to the 3D drawing.
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07
programming
1. Definition of steel processing coordinates: the rectangular reference faces the person, and the square reference faces the lower right corner. Under normal circumstances, all steel materials are programmed with X and Y as 0, and Z value as 0 to establish processing coordinates. (See CNC machining coordinate definition and clamping direction standard diagrams 1, 2, 3)
2. Leave 0.5mm on one side in the rough machining program, and leave a craft table on the top of the quenched mold core, which is convenient for clamping during finishing machining.
3. Finish machining the bottom of the mold core first, and avoid hitting the front of the mold core, PL, glue, etc.
4. Mold core position: the tube position of all front and rear mold cores is programmed to be 0.01mm smaller on one side.
5. Plane PL processing: program processing needs to be accurate according to the size of the drawing, and the operator needs to use a calibration meter to measure the tolerance within +0.01~0mm.
6. For arc surface PL machining, the programmer will do a test tool program, and the program sheet will indicate the connection with the bottom plane PL, and the light knife machining program will make accurate dimensions.
When the front and rear mold core processing coordinates are defined, the rectangular reference faces the person, and the square reference faces the lower right corner (X, Y four-sided center is 0, and Z is 0 when it touches the bottom), as shown in Figure 1, Figure 2, and Figure 3:
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Convex CORE bump numbers are shown in Figure 4 and Figure 5;
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Figure 6 shows the number of row seat collisions:
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The number of mold base collisions is shown in Figure 7:
