CN220235103U - Processing structure of FR-4 thin copper gong slotted hole - Google Patents
Processing structure of FR-4 thin copper gong slotted hole Download PDFInfo
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- CN220235103U CN220235103U CN202321414005.XU CN202321414005U CN220235103U CN 220235103 U CN220235103 U CN 220235103U CN 202321414005 U CN202321414005 U CN 202321414005U CN 220235103 U CN220235103 U CN 220235103U
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- plate
- thin copper
- aluminum sheet
- plates
- cover plate
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 84
- 239000010949 copper Substances 0.000 title claims abstract description 84
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 53
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000758 substrate Substances 0.000 claims description 10
- 239000004593 Epoxy Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000003801 milling Methods 0.000 abstract description 24
- 238000003754 machining Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 238000003475 lamination Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model discloses a processing structure of a gong slot hole of an FR-4 thin copper plate, which comprises at least two layers of FR-4 thin copper plates and aluminum sheets with the same layer number as the FR-4 thin copper plates, wherein the FR-4 thin copper plates and the aluminum sheets are sequentially staggered from bottom to top; the upper part of the aluminum sheet plate at the uppermost end is provided with a cover plate, and the lower part of the FR-4 thin copper plate at the lowermost end is provided with a base plate. According to the utility model, the stacked FR-4 thin copper plate and the aluminum sheet plate are tightly pressed between the cover plate and the base plate, and the milling cutter sequentially milling the groove holes matched with the copper boss in size on the aluminum sheet plate and the FR-4 thin copper plate through the prefabricated groove holes on the cover plate, so that burrs are not easy to generate when the FR-4 thin copper plate milling groove is formed, and curling is not easy to generate when the FR-4 thin copper plate in a lamination pressing state is milled; through setting up the aluminum sheet board between adjacent FR-4 thin copper board for dissipation gong groove process produces heat, can process a plurality of FR-4 thin copper boards simultaneously at a time, improves machining efficiency.
Description
Technical Field
The utility model relates to the technical field of circuit board processing, in particular to a processing structure of FR-4 thin copper plate gong slot holes.
Background
The routing refers to controlling a routing tool through a numerical control milling machine (called routing machine for short), routing a preset shape on a substrate to form a PCB (printed circuit board) or a plurality of PCB single boards, and the routing machine is a numerical control milling machine capable of carrying out contour machining on the substrate. The PCB obtained by the routing processing method has smooth edges, accurate size and high precision of the hole and the slot, and can greatly save time and cost in small batches and sample plate output, so that routing forming is the main stream choice for the appearance processing of the current PCB.
However, with the continuous development of the current PCB manufacturing process industry, the requirements of products formed by mixing and pressing copper-based and FR-4 thin plates are increasingly greater; when the PCB is manufactured, slots matched with copper bosses of the metal substrate are required to be punched on the FR-4 thin copper plate, so that the copper bosses are embedded into the slots of the FR-4 thin copper plate, and the FR-4 thin copper plate and the metal substrate are pressed together. In the process of milling the slot hole, as the thickness of the FR-4 thin copper plate is only 0.08mm, and the milling cutter can directly contact with the top copper foil of the FR-4 thin copper plate in the running process, the phenomenon of burrs and curling can be generated at the contact position of the milling cutter and the edge of the slot hole, copper dust particles can be formed between the FR-4 thin copper plate and the copper substrate by the burrs and curling after the lamination, and the burrs and curling can be embedded into an insulating material between the FR-4 thin copper plate and the copper substrate after the lamination, so that the problems of potential interlayer short circuit or dielectric breakdown intolerance and the like are caused.
Disclosure of Invention
In order to overcome the defects, the utility model provides a processing structure of the gong slot of the FR-4 thin copper plate, which can effectively solve the problems of burrs and curled edges of the gong slot and has higher efficiency.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the processing structure of the FR-4 thin copper plate gong slot hole comprises at least two layers of FR-4 thin copper plates and aluminum sheet plates with the same layer number as the FR-4 thin copper plates, wherein the FR-4 thin copper plates and the aluminum sheet plates are sequentially staggered from bottom to top; the upper part of the aluminum sheet plate at the uppermost end is provided with a cover plate, and the lower part of the FR-4 thin copper plate at the lowermost end is provided with a base plate.
As a further improvement of the utility model, positioning holes are respectively arranged at the corresponding positions of the four corners of the base plate, the cover plate and the aluminum sheet; pins are additionally arranged to pass through the positioning holes on the base plate, the aluminum sheet plate and the cover plate to press the FR-4 thin copper plate between the base plate and the aluminum sheet plate and/or between the two aluminum sheet plates.
As a further improvement of the present utility model, the thickness of the aluminum sheet plate is 0.1mm to 0.15mm.
As a further improvement of the utility model, the cover plate is made of FR4 epoxy glass cloth, and the thickness of the cover plate is 1.0mm to 2.0mm.
As a further improvement of the utility model, the backing plate is made of a paper substrate, and the thickness of the backing plate is 2.0mm to 3.0mm.
The beneficial effects of the utility model are as follows:
1. the stacked FR-4 thin copper plates and the aluminum sheet plates are tightly pressed between the cover plate and the base plate, and the milling cutter sequentially milling slots matched with copper bosses on the metal base plate on the aluminum sheet plates and the FR-4 thin copper plates through prefabricated slots on the cover plate, so that burrs are not easy to generate when the FR-4 thin copper plates milling slots, and curling is not easy to generate when the FR-4 thin copper plates in a lamination pressing state are milling slots;
2. through setting up the aluminum sheet board between adjacent FR-4 thin copper board for dissipation gong groove process produces heat, can process a plurality of FR-4 thin copper boards simultaneously at a time, improves machining efficiency.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view showing an exploded structure of the present utility model provided with two layers of FR-4 thin copper plate.
The following description is made with reference to the accompanying drawings:
1. FR-4 thin copper plate; 2. an aluminum sheet plate; 3. a cover plate; 4. a backing plate; 5. positioning holes; 6. a pin; A. and (5) milling.
Detailed Description
A preferred embodiment of the present utility model will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 2, the present utility model provides a processing structure for FR-4 thin copper plate gong slot, which is convenient for forming burrs and curls on FR-4 thin copper plate gong slot with thickness of 0.08 mm.
Specifically, referring to fig. 1, the processing structure of the present application includes at least two layers of FR-4 thin copper plates 1 and aluminum sheets 2 with the same layer number as the FR-4 thin copper plates 1, wherein the FR-4 thin copper plates 1 and the aluminum sheets 2 are sequentially staggered from bottom to top; the upper part of the uppermost aluminum sheet 2 is provided with a cover plate 3, and the lower part of the lowermost FR-4 thin copper sheet 1 is provided with a backing plate 4.
When the FR-4 thin copper plate 1 is subjected to slot milling, the base plate 4 is fixed on a milling table of a milling machine, then the FR-4 thin copper plate 1 and the aluminum sheet 2 are sequentially stacked on the base plate 4, the cover plate 3 is stacked above the aluminum sheet 2, and the cover plate 3 is opposite to a tool bit of a milling tool A of the milling machine. The FR-4 thin copper plate 1 and the aluminum sheet plate 2 can be provided with multiple layers, and the FR-4 thin copper plate 1 and the aluminum sheet plate 2 of the multiple layers are sequentially stacked, so that a plurality of FR-4 thin copper plates 1 can be processed simultaneously, the processing efficiency is improved, and the consistency of slotted holes is ensured. Referring to fig. 1, the FR-4 thin copper plate 1 and the aluminum sheet plate 2 as the best application are each provided in four layers, and the FR-4 thin copper plate 1 always faces upward (i.e., the first wiring layer is upward) during stacking.
Further, positioning holes 5 are respectively formed in the corresponding positions of the four corners of the base plate 4, the cover plate 3 and the aluminum sheet plate 2; pins 6 are additionally arranged to pass through the locating holes 5 on the backing plate 4, the aluminum sheet plates 2 and the cover plate 3 to press the FR-4 thin copper plate 1 between the backing plate 4 and the aluminum sheet plates 2 and/or between the two aluminum sheet plates 2.
Referring to fig. 2, the length and width dimensions of the backing plate 4, the cover plate 3 and the aluminum sheet 2 are consistent, the length and width dimensions of the FR-4 thin copper sheet 1 are slightly smaller than those of the backing plate 4, the cover plate 3 and the aluminum sheet 2, and positioning holes 5 are respectively arranged at the four corners of the backing plate 4, the cover plate 3 and the aluminum sheet 2; the base plate 4, the aluminum sheet plate 2 and the cover plate 3 can be sequentially laminated by using the pins 6 for arrangement, and the FR-4 thin copper plate 1 is just tightly pressed between laminated structures, so that the stability of the whole processing structure in the process of milling a groove is ensured, and the quality of a groove hole is ensured. It can be appreciated that when the present application processes two layers of FR-4 thin copper plate 1 simultaneously, as shown in fig. 2, the laminated structure is a backing plate 4, FR-4 thin copper plate 1, aluminum sheet plate 2 and cover plate 3 from bottom to top in this order.
Further, the thickness of the aluminum sheet plate 2 is 0.1mm to 0.15mm. Preferably, the thickness of the aluminum sheet plate 2 is 0.128mm, and the aluminum sheet plate 2 with the thickness specification has certain rigidity, is easy to penetrate by a cutter, has good heat dissipation, and can ensure the dissipation of processing heat when the groove milling processing is carried out on the multilayer FR-4 thin copper plate 1. Meanwhile, in the machining process, the double-edged knife with the diameter of 1.2mm is adopted to carry out milling groove machining in order to control the cutter to cause the problem that burrs appear in groove hole machining due to abrasion in the machining process, so that the edge of a milled groove hole is smooth.
Further, the cover plate 3 is made of FR4 epoxy glass cloth, and the thickness of the cover plate 3 is 1.0mm to 2.0mm. The FR4 epoxy glass cloth has good flatness and good machining property, and meanwhile, the thickness of the cover plate 3 is preferably 1.5mm, and the thickness specification ensures that the cover plate 3 has a certain weight to press the aluminum sheet 2 and the FR-4 thin copper plate 1 layer at the lower end under certain gravity. Meanwhile, a prefabricated slot hole slightly larger than the slot hole on the FR-4 thin copper plate 1 is formed in the cover plate 3, namely, a milling cutter sequentially performs milling on the aluminum sheet plate 2 and the FR-4 thin copper plate 1 according to the outline of the prefabricated slot hole, so that the processing efficiency of the slot hole is improved.
Further, the backing plate 4 is made of a paper substrate, and the thickness of the backing plate 4 is 2.0mm to 3.0mm. The paper substrate has low cost, low price and low relative density, and is easy to punch. As the preferable backing plate 4 has the thickness of 2.5mm, the end face of the cutter is not easy to be worn and damaged, and the FR-4 thin copper plate 1 at the bottommost layer is ensured to smoothly finish the milling groove.
It can be appreciated that, in order to facilitate the use of the present application, the bottom of the pin 6 can be fixed on the table surface of the gong machine, that is, the upper part of the pin 6 is vertically upward, then the locating holes 5 on the base plate, the aluminum sheet and the cover plate sequentially penetrate through the pin 6, and then the present application is fixed on the table surface of the gong machine. Another fixing way is to set a positioning fixture (not shown) on the working table surface, which is matched with the application. The fine fixation of this application can avoid taking place the skew at gong groove in-process this application, further improves the machining precision of slotted hole, shortens the fixed time of location of this processing structure simultaneously, improves machining efficiency.
In summary, according to the processing structure of the FR-4 thin copper plate gong slot hole, the stacked FR-4 thin copper plate and the aluminum sheet plate are tightly pressed between the cover plate and the base plate, and the gong knife sequentially gongs the slot holes matched with the copper boss in size on the aluminum sheet plate and the FR-4 thin copper plate through the prefabricated slot holes on the cover plate, so that the front is not easy to generate when the FR-4 thin copper plate gong slot is formed, and the hemming is not easy to generate when the FR-4 thin copper plate under the lamination pressing state is kept to gong slot; through setting up the aluminum sheet board between adjacent FR-4 thin copper board for dissipation gong groove process produces heat, can process a plurality of FR-4 thin copper boards simultaneously at a time, improves machining efficiency.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.
Claims (5)
1. The utility model provides a FR-4 thin copper gong slotted hole's processing structure which characterized in that: the novel aluminum plate comprises at least two layers of FR-4 thin copper plates (1) and aluminum plates (2) with the same layer number as the FR-4 thin copper plates (1), wherein the FR-4 thin copper plates (1) and the aluminum plates (2) are sequentially staggered from bottom to top; the upper part of the aluminum sheet plate (2) at the uppermost end is provided with a cover plate (3), and the lower part of the FR-4 thin copper sheet plate (1) at the lowermost end is provided with a base plate (4).
2. The processing structure of FR-4 thin copper plate gong slot hole according to claim 1, characterized in that: positioning holes (5) are respectively formed in the corresponding positions of the four corners of the base plate (4), the cover plate (3) and the aluminum sheet (2); pins (6) are additionally arranged to penetrate through the locating holes (5) on the base plate (4), the aluminum sheet plates (2) and the cover plate (3) to press the FR-4 thin copper plate (1) between the base plate (4) and the aluminum sheet plates (2) and/or between the two aluminum sheet plates (2).
3. The processing structure of FR-4 thin copper plate gong slot hole according to claim 1, characterized in that: the thickness of the aluminum sheet plate (2) is 0.1mm to 0.15mm.
4. The processing structure of FR-4 thin copper plate gong slot hole according to claim 1, characterized in that: the cover plate (3) is made of FR4 epoxy glass cloth, and the thickness of the cover plate (3) is 1.0mm to 2.0mm.
5. The processing structure of FR-4 thin copper plate gong slot hole according to claim 1, characterized in that: the backing plate (4) is made of a paper substrate, and the thickness of the backing plate (4) is 2.0mm to 3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321414005.XU CN220235103U (en) | 2023-06-05 | 2023-06-05 | Processing structure of FR-4 thin copper gong slotted hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321414005.XU CN220235103U (en) | 2023-06-05 | 2023-06-05 | Processing structure of FR-4 thin copper gong slotted hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220235103U true CN220235103U (en) | 2023-12-22 |
Family
ID=89197119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321414005.XU Active CN220235103U (en) | 2023-06-05 | 2023-06-05 | Processing structure of FR-4 thin copper gong slotted hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220235103U (en) |
-
2023
- 2023-06-05 CN CN202321414005.XU patent/CN220235103U/en active Active
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| GR01 | Patent grant | ||
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