CN114189993A - Circuit board high-precision forming programming design method - Google Patents
Circuit board high-precision forming programming design method Download PDFInfo
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- CN114189993A CN114189993A CN202111345193.0A CN202111345193A CN114189993A CN 114189993 A CN114189993 A CN 114189993A CN 202111345193 A CN202111345193 A CN 202111345193A CN 114189993 A CN114189993 A CN 114189993A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003754 machining Methods 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 5
- 238000003672 processing method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 5
- 238000010923 batch production Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
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Abstract
The invention discloses a design method of a high-precision forming program of a circuit board, wherein the coarse routing and the fine trimming comprise coarse routing processing and fine trimming processing, the coarse routing processing is a first processing cutter, a CNC processing program is designed to be 3mil (0.076mm) smaller than the shape of a PCB (printed circuit board), namely the overall size of the processed PCB is 6mil larger than the required size, meanwhile, dust generated by processing is removed, the fine trimming processing is a second processing cutter, the CNC processing program is designed according to the actual required shape of the PCB, the shape after the coarse processing is continuously processed, and most resistance of the cutter is removed in the processing, so that the cutter moving process is stable. The problem of PCB overall dimension machining precision is solved, and the dimensional requirement of +/-0.05 mm in precision assembly of electronic products is met.
Description
Technical Field
The invention relates to the field of circuit board processing, in particular to a high-precision forming program design method for a circuit board.
Background
Along with the continuous improvement of living standard and the change of consumption concept, electronic products and equipment used in daily life have higher requirements on appearance while meeting the use function! Therefore, higher requirements are required on the assembly precision of the manufacturing link of the electronic product, and the external shape of the PCB serving as the main carrier of the electronic product must be improved to +/-0.05 mm to meet the assembly requirements of the product. In the existing circuit board shape processing method, according to the processing program designed by the conventional processing method, the conventional capability of the PCB shape size precision is made to be +/-0.13 mm, and the limit capability is made to be +/-0.1 mm. According to the traditional processing program design, the outline dimension precision of the PCB can only reach +/-0.1 mm, and the requirement of +/-0.05 mm for high-precision assembly of electronic products cannot be met.
Disclosure of Invention
In order to solve the above problems, the present invention discloses a method for designing a high-precision forming program of a circuit board, which is characterized in that: the design CNC processing program comprises a rough gong and fine finishing and/or a pre-compensation tool offset processing program.
Further, thick gong adds the finish machining including thick gong processing and finish machining, thick gong processing is first processing cutter, and CNC processing form designs to be than the little 3mil (0.076mm) of PCB overall shape, and the PCB overall dimension that processes promptly is 6 mils big than the demand size is whole, and the produced dust of simultaneous processing has been discharged, the finish machining is the second to the processing cutter, and CNC processing form presses PCB actual demand design, continues the appearance after the rough machining of processing completion, and this time processing makes cutter sword process stable because of having cleared away most resistance of cutter.
Furthermore, the pre-compensation tool offset processing program is to pre-design the offset caused by the uneven resistance of the tool into the processing program, that is, the pre-compensation processing method is adopted: when the tool is shifted to the remainder region by 0.025mm, the processing program design moves the tool processing path to the PCB effective region by 0.025mm to offset the tool shift.
Further, the rough gong adds the finishing and precompensates the offset processing form of cutter and can use at the same time also can use alone.
Further, the processing of the PCB circuit board by using the processing program comprises the following steps:
starting up, starting up the CNC milling machine, and returning machine parameters to zero positions;
setting, reading the processing program, and setting the tool parameters according to the processing program;
manufacturing a processing template, setting a processing zero position, and planting and positioning PIN nails on a processing table board according to a processing program;
feeding, namely sleeving a PCB to be processed into a PIN nail according to a foolproof direction, and fixing the PIN nail on a processing table of a gong machine;
processing, executing a processing instruction, confirming a first piece, and carrying out batch production;
and (5) blanking, and finishing processing and taking down the PCB.
The invention solves the problem of the processing precision of the external dimension of the PCB, achieves the dimensional requirement of +/-0.05 mm in precision assembly of electronic products, meets the dimensional requirement of high-precision assembly of the electronic products, and improves the quality of the electronic products and the use experience of users.
Drawings
Fig. 1 is a simulation diagram of a traveling path of the PCB profile processing tool according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
Examples
As shown in FIG. 1, a design method of a high-precision forming program of a circuit board, wherein a designed CNC processing program comprises a coarse gong and fine finishing and/or a pre-compensation tool offset processing program, the coarse gong and fine finishing comprises coarse gong processing and fine finishing, the coarse gong processing is a first processing tool, the CNC processing program is designed to be 3mil (0.076mm) smaller than the shape of a PCB, the PCB overall dimension who processes promptly is 6 mils bigger than the demand size is whole, the produced dust of simultaneous processing has been discharged, the finishing processing is the second processing cutter, CNC processing form is according to PCB actual demand appearance design, continue to process the appearance after accomplishing rough machining, this time processing is because of having cleared away most resistance of cutter, make cutter sword process stable, the offset that precompensation cutter offset processing form leads to for the resistance inequality that receives the cutter designs in advance into the processing form, adopt the processing method of precompensation promptly: when the tool shifts 0.025mm to the remainder area, the processing program design moves the tool processing path 0.025mm to the PCB effective area to offset the tool offset, and the rough milling and finishing and pre-compensation tool offset processing program can be used simultaneously or separately.
The method for processing the PCB circuit board by using the processing program comprises the following steps:
starting up, starting up the CNC milling machine, and returning machine parameters to zero positions;
setting, reading the processing program, and setting the tool parameters according to the processing program;
manufacturing a processing template, setting a processing zero position, and planting and positioning PIN nails on a processing table board according to a processing program;
feeding, namely sleeving a PCB to be processed into a PIN nail according to a foolproof direction, and fixing the PIN nail on a processing table of a gong machine;
processing, executing a processing instruction, confirming a first piece, and carrying out batch production;
and (5) blanking, and finishing processing and taking down the PCB.
The technology of the invention is a set of method designed for meeting the demand trend and improving the PCB forming precision, which can improve the PCB outline dimension precision from the original tolerance of plus or minus 0.10mm to the tolerance of plus or minus 0.05mm, thereby meeting the dimension requirement of electronic product precision assembly.
The invention improves the program design on the basis of the conventional processing program, and meets the requirement of +/-0.05 mm of the processing precision of the external dimension of the PCB through the pre-compensation program design, the rough routing and the fine finishing program design. According to the invention, the requirement of +/-0.05 mm of the processing precision of the external dimension of the PCB is realized through an engineering design pre-compensation program, a rough routing and a fine finishing program.
An engineer uses computer aided manufacturing design software (CAM software) to design a CNC processing program according to the shape of the PCB; CNC adds man-hour, when the clout outside the PCB appearance effective area is less than 1.75 times of processing cutter diameter, the resistance that the processing cutter received between this clout region and PCB effective area is uneven, and the regional atress of clout leads to the cutter to the regional direction skew of clout, leads to PCB effective area size to be bigger than normal to can't reach PCB appearance size required precision!
The improved processing program:
1. coarse gong + fine finishing
a. The first processing cutter, CNC processing program is designed to be 3mil (0.076mm) smaller than the outline of PCB, namely the outline of the processed PCB is 6mil larger than the required size, and meanwhile, dust generated by processing is discharged; this is called rough routing!
b. The second processing cutter and the CNC processing program are designed according to the actual appearance of the PCB, the rough processed appearance is continuously processed, most resistance of the cutter is eliminated in the processing, so that the cutter running process is stable, the deviation is extremely small, and the PCB finishing processing method belongs to fine finishing processing;
2. precompensating for tool offset
The offset caused by the uneven resistance of the cutter is designed into a processing program in advance, namely, a pre-compensation processing method is adopted: when the cutter deviates 0.025mm from the residual material area, the processing program design moves the cutter processing path to the PCB effective area by 0.025mm to offset the deviation of the cutter, thereby achieving the purpose of meeting the PCB appearance processing precision.
The rough routing, the fine finishing and the pre-compensation tool offset are used as a processing method for mutual reinforcement, and can be used simultaneously or independently.
PCB shape processing flow
a. Starting up: starting a CNC milling machine, and enabling machine parameters to return to zero positions;
b. setting: reading the processing program and setting the parameters of the tool according to the processing program;
c. manufacturing a processing template: setting a processing zero point position, and planting and positioning PIN nails on a processing table board according to a processing program;
d. feeding: sleeving a PCB to be processed into a PIN nail according to a foolproof direction, and fixing the PIN nail on a processing table of a gong machine;
e. processing: executing a processing instruction, confirming a first piece, and carrying out batch production;
g. blanking: and (5) after the processing, taking down the PCB.
PCB production board makeup picture: the N finished PCBs are spliced on one board, the CNC machining distance is reserved directly for a single PCB, and the purpose of splicing the PCB is to improve the production efficiency and meet the equipment machining conditions. The tool path is moved outward by 0.025mm to offset the left offset of the tool due to uneven resistance in actual machining.
The above embodiments only describe the best mode of use of the existing equipment, and similar common mechanical means are used to replace the elements in the present embodiments, which fall into the protection scope.
Claims (5)
1. A high-precision forming program design method of a circuit board is characterized in that: the design CNC processing program comprises a rough gong and fine finishing and/or a pre-compensation tool offset processing program.
2. The method of claim 1, wherein the method comprises: coarse gong adds the finish machining including coarse gong processing and finish machining, coarse gong processing is first processing cutter, and CNC processing form designs to be than the little 3mil (0.076mm) of PCB overall shape, and the PCB overall dimension who processes promptly is 6 mils big than the demand size is whole, and the produced dust of simultaneous processing has been discharged, the finish machining is the second processing cutter, and the design of PCB actual demand appearance is pressed to CNC processing form, continues the appearance after the coarse machining of processing completion, and this time processing makes cutter row sword process stable because of having cleared away the most resistance of cutter.
3. The method of claim 1 or 2, wherein: the pre-compensation tool offset processing program is to pre-design the offset caused by the uneven resistance of the tool into the processing program, namely, a pre-compensation processing method is adopted: when the tool is shifted to the remainder region by 0.025mm, the processing program design moves the tool processing path to the PCB effective region by 0.025mm to offset the tool shift.
4. The method of claim 3, wherein the method comprises: the rough gong machining program, the fine finishing machining program and the pre-compensation tool offset machining program can be used simultaneously or independently.
5. The method of claim 4, wherein the method comprises: the PCB circuit board processing method using the processing program comprises the following steps:
starting up, starting up the CNC milling machine, and returning machine parameters to zero positions;
setting, reading the processing program, and setting the tool parameters according to the processing program;
manufacturing a processing template, setting a processing zero position, and planting and positioning PIN nails on a processing table board according to a processing program;
feeding, namely sleeving a PCB to be processed into a PIN nail according to a foolproof direction, and fixing the PIN nail on a processing table of a gong machine;
processing, executing a processing instruction, confirming a first piece, and carrying out batch production;
and (5) blanking, and finishing processing and taking down the PCB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111345193.0A CN114189993A (en) | 2021-11-15 | 2021-11-15 | Circuit board high-precision forming programming design method |
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| CN202111345193.0A CN114189993A (en) | 2021-11-15 | 2021-11-15 | Circuit board high-precision forming programming design method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170038760A1 (en) * | 2015-08-08 | 2017-02-09 | General Electric Company | Machine toolpath compensation using vibration sensing |
| CN107708305A (en) * | 2017-08-30 | 2018-02-16 | 奥士康精密电路（惠州）有限公司 | Gong plate technique for accurate control base board external form |
| CN107708307A (en) * | 2017-08-30 | 2018-02-16 | 奥士康精密电路（惠州）有限公司 | Gong plate method based on automatic identification parameter |
| CN110976913A (en) * | 2019-11-22 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Turning and cutting method of high-temperature alloy ring-shaped piece |
| TWI704028B (en) * | 2019-08-21 | 2020-09-11 | 漢翔航空工業股份有限公司 | Tool path location compensation system based on offset of fixture |
| CN113411975A (en) * | 2021-06-26 | 2021-09-17 | 奥士康精密电路（惠州）有限公司 | Routing method for PTH groove tangent to forming edge |
-
2021
- 2021-11-15 CN CN202111345193.0A patent/CN114189993A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170038760A1 (en) * | 2015-08-08 | 2017-02-09 | General Electric Company | Machine toolpath compensation using vibration sensing |
| CN107708305A (en) * | 2017-08-30 | 2018-02-16 | 奥士康精密电路（惠州）有限公司 | Gong plate technique for accurate control base board external form |
| CN107708307A (en) * | 2017-08-30 | 2018-02-16 | 奥士康精密电路（惠州）有限公司 | Gong plate method based on automatic identification parameter |
| TWI704028B (en) * | 2019-08-21 | 2020-09-11 | 漢翔航空工業股份有限公司 | Tool path location compensation system based on offset of fixture |
| CN110976913A (en) * | 2019-11-22 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Turning and cutting method of high-temperature alloy ring-shaped piece |
| CN113411975A (en) * | 2021-06-26 | 2021-09-17 | 奥士康精密电路（惠州）有限公司 | Routing method for PTH groove tangent to forming edge |
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Address after: 338000 No. 2688, hengsan Road, high tech Development Zone, Xinyu City, Jiangxi Province Applicant after: Xinyu Mulinsen Electronics Co.,Ltd. Address before: 338000 No. 2688, hengsan Road, high tech Development Zone, Xinyu City, Jiangxi Province Applicant before: XINYU MULINSEN CIRCUIT BOARD Co.,Ltd. |