CN103170664B - A kind of dark groove milling method of control and milling machine - Google Patents
A kind of dark groove milling method of control and milling machine Download PDFInfo
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- CN103170664B CN103170664B CN201110439616.5A CN201110439616A CN103170664B CN 103170664 B CN103170664 B CN 103170664B CN 201110439616 A CN201110439616 A CN 201110439616A CN 103170664 B CN103170664 B CN 103170664B
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Abstract
The embodiment of the invention discloses a kind of dark groove milling method of control and milling machine, before milling step trough, according to pretreatment parameter, control milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, because described milling cutter central shaft is in this process less than described metal aperture radius from the distance of described metal aperture central shaft, therefore, the lower cutter position of milling cutter switches to base material after ensure that and first switching to layers of copper, and layers of copper is cut and has defeated on base material, layers of copper is made to lose wider space, thus hole wall layers of copper can not be pulled up because of cutting force and is separated with base material, avoid etching solution in PCB subsequent handling and flow into the problem making hole wall layers of copper etched between hole wall layers of copper and base material, ensure that the quality of metal aperture, and then ensure that the quality of PCB, in addition, the annular region in metal aperture aperture is just in time the region forming burr, and the formation of this annular region just avoids the generation of burr, further ensures the quality of PCB.
Description
Technical field
The present invention relates to printed wiring board manufacture field, particularly relate to a kind of dark groove milling method of control and milling machine.
Background technology
In printed wiring board (PrintedCircuitBoard, PCB) field, controlling dark groove milling is utilize milling cutter PCB to be milled out the step trough of certain depth and a kind of technique of PCB milling not worn.As shown in Figure 1, when PCB is provided with metal aperture 1, adopt tool path pattern as shown by the arrows in Figure 2, milling cutter 2 first will switch to the base material in metal aperture 1 region, then along with displacement, be cut to the hole wall layers of copper of metal aperture 1 more gradually, like this, because hole wall layers of copper ductility is better, the wider space of layers of copper is there is again in metal aperture 1, hole wall layers of copper can be pulled up because of cutting force and be separated with base material, the etching solution in PCB subsequent technique not only can be made to flow into the gap between hole wall layers of copper and base material and hole wall layers of copper be etched away, cause scrapping without metal in metal aperture 1, and layers of copper is not easily cut disconnected, often there is too much burr 3 in metal aperture 1 aperture, as shown in Figure 3, affect client to use.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of dark groove milling method of control and milling machine, to be separated and phenomenon that metal aperture aperture burr is too much, to improve PCB quality to avoid hole wall layers of copper in PCB metal aperture with base material.
In order to solve the problems of the technologies described above, the embodiment of the present invention proposes a kind of dark groove milling method of control, comprising:
According to pretreatment parameter, control milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, described milling cutter central shaft is less than described metal aperture radius from the distance of described metal aperture central shaft in this process, and control milling cutter direct of travel and milling cutter rotation mode are to ensure that milling cutter switches to base material first switch to the layers of copper of metal aperture inwall in each milling cycle after;
According to groove milling parameter, control described milling cutter and mill out step trough in described metal aperture region.
Further, described pretreatment parameter comprises the first parameter controlling milling cutter all movements counterclockwise along described metal aperture hole, and the clockwise rotation of described milling cutter is to mill out the second parameter of described annular region.
Further, described annular region external diameter is greater than metal aperture aperture 0.1-1mm.
Correspondingly, the embodiment of the present invention additionally provides a kind of milling machine, comprises controller and milling cutter, and described controller comprises:
Memory module, for storing the running parameter of described milling cutter, this running parameter comprises for pretreatment parameter and groove milling parameter;
First control module, for according to described pretreatment parameter, control described milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, described milling cutter central shaft is less than described metal aperture radius from the distance of described metal aperture central shaft in this process, and control milling cutter direct of travel and milling cutter rotation mode are to ensure that milling cutter switches to base material first switch to the layers of copper of metal aperture inwall in each milling cycle after;
Second control module, for according to described groove milling parameter, controls described milling cutter and mills out step trough in described metal aperture region.
Further, described pretreatment parameter comprises the first parameter controlling milling cutter all movements counterclockwise along described metal aperture hole, and the clockwise rotation of described milling cutter is to mill out the second parameter of described annular region.
Further, described annular region external diameter is greater than metal aperture aperture 0.1-1mm.
The embodiment of the present invention is by providing a kind of dark groove milling method of control and milling machine, before milling step trough, according to pretreatment parameter, control milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, because described milling cutter central shaft is in this process less than described metal aperture radius from the distance of described metal aperture central shaft, therefore, the lower cutter position of milling cutter switches to base material after ensure that and first switching to layers of copper, and layers of copper is cut and has defeated on base material, layers of copper is made to lose wider space, thus hole wall layers of copper can not be pulled up because of cutting force and is separated with base material, avoid etching solution in PCB subsequent handling and flow into the problem making hole wall layers of copper etched between hole wall layers of copper and base material, ensure that the quality of metal aperture, and then ensure that the quality of PCB, in addition, the annular region in metal aperture aperture is just in time the region forming burr, and the formation of this annular region just avoids the generation of burr, further ensures the quality of PCB.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the PCB of prior art.
Fig. 2 is the schematic diagram of milling cutter 2 tool path pattern of prior art.
Fig. 3 is the schematic diagram forming burr after milling cutter 2 feed of prior art completes in metal aperture 1 aperture.
Fig. 4 is the main flow figure of the dark groove milling method of control of the embodiment of the present invention.
Fig. 5 is milling cutter 2 and metal aperture 1 position view in the dark groove milling method of control of the embodiment of the present invention.
Fig. 6 is the direction of motion schematic diagram that in the dark groove milling method of control of the embodiment of the present invention, milling cutter 2 carries out 402 step process.
Fig. 7 is the schematic diagram of annular region 4 size in the dark groove milling method of control of the embodiment of the present invention.
Fig. 8 is the floor map of the PCB that the dark groove milling method of control of the embodiment of the present invention mills out.
Fig. 9 is the A-A generalized section of the PCB that the dark groove milling method of control of the embodiment of the present invention mills out.
Figure 10 is the control dark groove milling method milling cutter 2 of embodiment of the present invention tool path pattern schematic diagram when carrying out 403 step process.
Figure 11 is the structural representation of the milling machine of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
The dark groove milling method of control of the embodiment of the present invention mainly comprises flow process as shown in Figure 4:
401, prepare the PCB with metal aperture 1 as shown in Figure 1, and with the milling machine of milling cutter 2;
402, milling machine is according to pretreatment parameter, control milling cutter 2 mills out the annular region 4 that external diameter is greater than metal aperture 1 aperture in metal aperture 1 periphery of PCB, in this process, as shown in Figure 5, milling cutter central shaft 5 is less than metal aperture 1 radius from the distance of metal aperture central shaft 6, particularly, pretreatment parameter comprises the first parameter controlling milling cutter 2 all movements counterclockwise along metal aperture 1 hole, the clockwise rotation of milling cutter 2 is to mill out the second parameter of annular region 4, and milling cutter 2 shift position coordinate parameters etc., like this, as shown in Figure 6, according to the first parameter, milling cutter 2 will be mobile counterclockwise along metal aperture 1 hole week, and according to the clockwise rotation of the second parameter to mill out annular region 4, and above-mentioned annular region 4 external diameter is greater than metal aperture 1 aperture 0.1-1mm, radial difference d inside and outside annular region 4 has been shown in Fig. 7, the value of d is 0.05-0.5mm, such as, above-mentioned annular region 4 external diameter is greater than metal aperture 1 aperture 0.1mm, 0.12mm, 0.3mm, 0.5mm, 0.8mm or 1mm etc., the selection of above-mentioned annular region 4 size is relevant with the region that generation metal aperture 1 aperture forms burr, empirically can choose annular region 4 external diameter of above-mentioned numerical value, and set pretreatment parameter with this,
403, milling machine is according to groove milling parameter, control milling cutter 2 mills out step trough 7 as can be seen from figures 8 and 9 in metal aperture 1 region, its tool path pattern can as shown in Figure 10 arrow, particularly, groove milling parameter can comprise position coordinate parameters etc., and this step can be the groove milling process of existing step trough 7, repeats no more herein.
In order to complete above-mentioned flow process, can also be realized by the milling machine of the embodiment of the present invention, this milling machine mainly comprises controller 8 as shown in figure 11 and milling cutter 2, and controller 8 comprises:
Memory module 9, for storing the running parameter of milling cutter 2, this running parameter comprises for pretreatment parameter and groove milling parameter, particularly, pretreatment parameter comprise control milling cutter 2 along metal aperture 1 hole week counterclockwise the first parameter of movement, the clockwise rotation of milling cutter 2 to mill out the second parameter of annular region 4, and milling cutter 2 shift position coordinate parameters etc.;
First control module 10, for the pretreatment parameter stored according to memory module 9, control milling cutter 2 and carry out pretreatment, namely the annular region 4 that external diameter is greater than metal aperture 1 aperture is milled out in metal aperture 1 periphery of PCB, milling cutter central shaft 5 is less than metal aperture radius from the distance of metal aperture central shaft 6 in this process, like this, equally as shown in Figure 6, according to the first parameter, milling cutter 2 will be mobile counterclockwise along metal aperture 1 hole week, and according to the clockwise rotation of the second parameter to mill out annular region 4, and above-mentioned annular region 4 external diameter is greater than metal aperture 1 aperture 0.1-1mm, radial difference d inside and outside annular region has been shown in Fig. 7, the value of d is 0.05-0.5mm, such as, above-mentioned annular region 4 external diameter is greater than metal aperture 1 aperture 0.1mm, 0.12mm, 0.3mm, 0.5mm, 0.8mm or 1mm etc., the selection of above-mentioned annular region 4 size is relevant with the region that generation metal aperture 1 aperture forms burr, empirically can choose annular region 4 external diameter of above-mentioned numerical value, and set pretreatment parameter with this,
Second control module 11, for the groove milling parameter stored according to memory module 9, control milling cutter 2 and mill out step trough 7 in metal aperture 1 region, its tool path pattern can still as shown in Figure 10 arrow, particularly, groove milling parameter can comprise position coordinate parameters etc., and this step can be the groove milling process of existing step trough 7, repeats no more herein.
Implement the dark groove milling method of control and the milling machine of the invention described above embodiment, before milling step trough, according to pretreatment parameter, control milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, because described milling cutter central shaft is in this process less than described metal aperture radius from the distance of described metal aperture central shaft, therefore, the lower cutter position of milling cutter switches to base material after ensure that and first switching to layers of copper, and layers of copper is cut and has defeated on base material, layers of copper is made to lose wider space, thus hole wall layers of copper can not be pulled up because of cutting force and is separated with base material, avoid etching solution in PCB subsequent handling and flow into the problem making hole wall layers of copper etched between hole wall layers of copper and base material, ensure that the quality of metal aperture, and then ensure that the quality of PCB, in addition, the annular region in metal aperture aperture is just in time the region forming burr, and the formation of this annular region just avoids the generation of burr, further ensures the quality of PCB.
The above is the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (6)
1. control a dark groove milling method, it is characterized in that, comprising:
According to pretreatment parameter, control milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, described milling cutter central shaft is less than described metal aperture radius from the distance of described metal aperture central shaft in this process, and control milling cutter direct of travel and milling cutter rotation mode are to ensure that milling cutter switches to base material first switch to the layers of copper of metal aperture inwall in each milling cycle after;
According to groove milling parameter, control described milling cutter and mill out step trough in described metal aperture region.
2. the dark groove milling method of control as claimed in claim 1, is characterized in that, described pretreatment parameter comprises the first parameter controlling milling cutter all movements counterclockwise along described metal aperture hole, and the clockwise rotation of described milling cutter is to mill out the second parameter of described annular region.
3. the dark groove milling method of control as claimed in claim 1 or 2, it is characterized in that, described annular region external diameter is greater than metal aperture aperture 0.1-1mm.
4. a milling machine, comprises controller and milling cutter, it is characterized in that, described controller comprises:
Memory module, for storing the running parameter of described milling cutter, this running parameter comprises for pretreatment parameter and groove milling parameter;
First control module, for according to described pretreatment parameter, control described milling cutter in the peripheral annular region milling out external diameter and be greater than metal aperture aperture of the metal aperture of printed wiring board, described milling cutter central shaft is less than described metal aperture radius from the distance of described metal aperture central shaft in this process, and control milling cutter direct of travel and milling cutter rotation mode are to ensure that milling cutter switches to base material first switch to the layers of copper of metal aperture inwall in each milling cycle after;
Second control module, for according to described groove milling parameter, controls described milling cutter and mills out step trough in described metal aperture region.
5. milling machine as claimed in claim 4, is characterized in that, described pretreatment parameter comprises the first parameter controlling milling cutter all movements counterclockwise along described metal aperture hole, and the clockwise rotation of described milling cutter is to mill out the second parameter of described annular region.
6. the milling machine as described in claim 4 or 5, is characterized in that, described annular region external diameter is greater than metal aperture aperture 0.1-1mm.
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| CN201110439616.5A CN103170664B (en) | 2011-12-23 | 2011-12-23 | A kind of dark groove milling method of control and milling machine |
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| CN201110439616.5A CN103170664B (en) | 2011-12-23 | 2011-12-23 | A kind of dark groove milling method of control and milling machine |
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| CN103170664B true CN103170664B (en) | 2016-03-30 |
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| CN113000915B (en) * | 2021-03-04 | 2022-07-15 | 恩达电路(深圳)有限公司 | Device for automatically adjusting milling groove depth of circuit board by using electromagnetic strength |
| CN113600886B (en) * | 2021-08-04 | 2022-06-03 | 湖南省方正达电子科技有限公司 | Multi-axis collaborative blind milling method and device for printed circuit board |
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Address after: 518000 Nanshan District, Guangdong, overseas Chinese town, No. East Road, No. 99 Patentee after: SHENZHEN SHENNAN CIRCUIT CO., LTD. Address before: 518000 Nanshan District, Guangdong, overseas Chinese town, No. East Road, No. 99 Patentee before: Shenzhen Shennan Circuits Co., Ltd. |