CN114147807A - Method for processing ultrashort slotted hole of circuit board - Google Patents
Method for processing ultrashort slotted hole of circuit board Download PDFInfo
- Publication number
- CN114147807A CN114147807A CN202111452901.0A CN202111452901A CN114147807A CN 114147807 A CN114147807 A CN 114147807A CN 202111452901 A CN202111452901 A CN 202111452901A CN 114147807 A CN114147807 A CN 114147807A
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- Prior art keywords
- hole
- slot
- diameter
- end mill
- circuit board
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003801 milling Methods 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 10
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 238000009966 trimming Methods 0.000 claims abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
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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
- H05K3/0047—Drilling of holes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Milling Processes (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a processing method of an ultrashort slotted hole of a circuit board, which comprises the following steps: the method comprises the following steps: firstly drilling a lower tool hole on the circuit board by using a pre-drilling tool; step two: using an end mill to align the center of the lower tool hole and feed downwards to mill and form a first round hole; step three: using an end mill to perform rough machining and milling along a straight line by taking the center of the first round hole as an initial point to form a second slotted hole; step four: and performing finish machining and trimming on the edge of the second slot hole by using a key slot milling cutter to finally form a third slot hole.
Description
Technical Field
The invention relates to a processing method of an ultrashort slotted hole of a circuit board.
Background
At present, ultrashort slotted holes in a PCB are usually processed by adopting a pre-drilling cutter drilling mode and a keyway milling cutter milling mode, and the processing mode mainly has the following two problems: firstly, the slot cutters are usually stressed unevenly during slot drilling, so that the slot cutters are deviated towards a direction with small stress, and the ultra-short slot holes are deformed; secondly, when the number of the laminated layers of the PCB board is higher, the stress difference is larger, and the deformation of the ultra-short slotted hole is more serious.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.
Disclosure of Invention
The invention overcomes the defects of the technology and provides
In order to achieve the purpose, the invention adopts the following technical scheme:
a processing method of an ultrashort slotted hole of a circuit board comprises the following steps:
the method comprises the following steps: firstly drilling a lower tool hole 2 on the circuit board 1 by using a pre-drilling tool;
step two: using an end mill to align the center of the lower tool hole 2 and feed downwards to mill and form a first round hole 3;
step three: using an end mill to perform rough machining and milling along a straight line by taking the center of the first round hole 3 as a starting point to form a second slotted hole 4;
step four: and (3) finishing and trimming the edge of the second slotted hole 4 by using a key slot milling cutter to finally form a third slotted hole 5.
Preferably, the end mill rotates clockwise in the angle of view of the tool holder towards the cutting edge, and in the third step, the end mill feeds outwards along a straight line which extends leftwards by taking the center of the first round hole 3 as an end point and is upwardly offset by 5 degrees so as to compensate for a path error caused by the forced offset of the end mill.
Preferably, the diameter of the first round hole 3 is smaller than the width of the third slot 5, and the width and the length of the second slot 4 are both smaller than the corresponding dimensions of the third slot 5.
Preferably, the diameter of the lower cutter hole 2 is 1.4 +/-0.08 mm, the diameter of the first round hole 3 is 2.4 +/-0.08 mm, the width of the second slotted hole 4 is 2.4 +/-0.08 mm, the length of the second slotted hole is 2.9 +/-0.08 mm, and the width of the third slotted hole 5 is 2.6 +/-0.08 mm, and the length of the third slotted hole is 3 +/-0.08 mm.
Preferably, the diameter of the pre-drilling cutter is 1.4mm, the diameter of the end milling cutter is 2.4mm, and the diameter of the keyway milling cutter is 1.5 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the processing method, the lower cutter hole is drilled by the aid of the pre-drilling cutter, so that the end milling cutter can be used, the multilayer circuit board can be roughly processed and cut quickly and efficiently by the aid of the end milling cutter to form a second slotted hole, the second slotted hole is finished and trimmed by the aid of the keyway milling cutter to form a third slotted hole, main cutting work aiming at the multilayer circuit board can be processed by the aid of efficient cutting capacity of the end milling cutter, and the third slotted hole is trimmed by the aid of the keyway milling cutter with high precision to guarantee that the size of the third slotted hole meets requirements.
2. The machining method can compensate the deformation of the end mill when the feed cutting is stressed by the offset of the feed path of the end mill, so that the machining precision can be further improved, and the deformation of the slotted hole can be avoided.
Drawings
FIG. 1 is a schematic view of the processing method of the present invention.
Detailed Description
The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1, a method for processing an ultra-short slot of a circuit board includes the following steps:
the method comprises the following steps: firstly drilling a lower tool hole 2 on the circuit board 1 by using a pre-drilling tool;
step two: using an end mill to align the center of the lower tool hole 2 and feed downwards to mill and form a first round hole 3;
step three: using an end mill to perform rough machining and milling along a straight line by taking the center of the first round hole 3 as a starting point to form a second slotted hole 4;
step four: and (3) finishing and trimming the edge of the second slotted hole 4 by using a key slot milling cutter to finally form a third slotted hole 5.
As described above, the machining method of the present invention firstly drills the lower tool hole 2 by using the pre-drilling tool, so that the end mill can be used, the end mill can perform rapid and efficient rough machining cutting on the multilayer circuit board to form the second slot hole 4, and finally, the keyway mill can perform finish machining trimming on the second slot hole 4 to form the third slot hole 5, so that the main cutting work on the multilayer circuit board can be dealt with by using the efficient cutting capability of the end mill, and finally, the third slot hole 5 can be trimmed by using the keyway mill with higher precision to ensure that the size of the third slot hole 5 meets the requirements.
As shown in fig. 1, preferably, the end mill rotates clockwise in the view angle of the tool holder towards the cutting edge, and in the third step, the end mill is fed outwards along a straight line which extends leftwards with the center of the first circular hole 3 as an end point and is upwardly deviated by 5 degrees so as to compensate for a path error caused by the stress deviation of the end mill.
As shown in fig. 1, preferably, the diameter of the first circular hole 3 is smaller than the width of the third slot 5, and both the width and the length of the second slot 4 are smaller than the corresponding dimensions of the third slot 5.
As shown in fig. 1, preferably, the diameter of the lower tool hole 2 is 1.4 ± 0.08mm, the diameter of the first circular hole 3 is 2.4 ± 0.08mm, the width of the second slot hole 4 is 2.4 ± 0.08mm, the length of the second slot hole is 2.9 ± 0.08mm, and the width of the third slot hole 5 is 2.6 ± 0.08mm, and the length of the third slot hole is 3 ± 0.08 mm.
As shown in fig. 1, preferably, the pre-drilling cutter diameter is 1.4mm, the end mill diameter is 2.4mm, and the keyway mill diameter is 1.5 mm.
As described above, the present disclosure is directed to a method for processing an ultra-short slot of a circuit board, and all technical solutions that are the same as or similar to the present disclosure should be considered as falling within the scope of the present disclosure.
Claims (5)
1. A processing method of an ultrashort slotted hole of a circuit board is characterized by comprising the following steps:
the method comprises the following steps: firstly drilling a lower tool hole (2) on the circuit board (1) by using a pre-drilling tool;
step two: an end mill is used for feeding downwards to align the center of the lower cutter hole (2), and a first round hole (3) is formed through milling;
step three: using an end mill to perform rough machining and milling along a straight line by taking the center of the first round hole (3) as an initial point to form a second slotted hole (4);
step four: and finishing and trimming the edge of the second slot (4) by using a key slot milling cutter to finally form a third slot (5).
2. The method as claimed in claim 1, wherein the end mill is rotated clockwise from the view angle of the shank toward the blade edge, and the end mill is fed outward along a line extending leftward from the center of the first circular hole (3) and shifted upward by 5 ° in step three so as to compensate for a path error caused by a force shift of the end mill.
3. The method as claimed in claim 1, wherein the diameter of the first circular hole (3) is smaller than the width of the third slot (5), and the width and length of the second slot (4) are smaller than the corresponding dimensions of the third slot (5).
4. The method for processing ultrashort slot of circuit board as claimed in claim 1, wherein the diameter of the lower blade hole (2) is 1.4 ± 0.08mm, the diameter of the first round hole (3) is 2.4 ± 0.08mm, the width of the second slot hole (4) is 2.4 ± 0.08mm, the length of the second slot hole is 2.9 ± 0.08mm, and the width of the third slot hole (5) is 2.6 ± 0.08mm, and the length of the third slot hole is 3 ± 0.08 mm.
5. The method as claimed in claim 4, wherein the pre-drilling diameter is 1.4mm, the end milling diameter is 2.4mm, and the keyway milling diameter is 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111452901.0A CN114147807A (en) | 2021-11-30 | 2021-11-30 | Method for processing ultrashort slotted hole of circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111452901.0A CN114147807A (en) | 2021-11-30 | 2021-11-30 | Method for processing ultrashort slotted hole of circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114147807A true CN114147807A (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111452901.0A Pending CN114147807A (en) | 2021-11-30 | 2021-11-30 | Method for processing ultrashort slotted hole of circuit board |
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| CN (1) | CN114147807A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117119694A (en) * | 2023-10-23 | 2023-11-24 | 四川英创力电子科技股份有限公司 | Processing technology for printed circuit board superposition drilling and milling |
| CN117641742A (en) * | 2023-12-20 | 2024-03-01 | 皆利士多层线路版(中山)有限公司 | Process for square and round slot holes of circuit board |
Citations (9)
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| CN102411337A (en) * | 2011-12-02 | 2012-04-11 | 大连理工大学 | Tool-path planning compensation method for geometrical error of processed surface of part |
| CN104772648A (en) * | 2015-04-09 | 2015-07-15 | 西安工业大学 | Milling processing method for thin-wall workpiece of airplane |
| CN104816026A (en) * | 2015-05-05 | 2015-08-05 | 柳州玲通科技有限责任公司 | Thin-wall part processing method |
| CN106338965A (en) * | 2016-10-25 | 2017-01-18 | 哈尔滨理工大学 | Error compensation based corner processing precision control method |
| CN108568539A (en) * | 2017-03-07 | 2018-09-25 | 惠州中京电子科技有限公司 | A kind of ultrashort groove processing methods of PCB |
| CN109819593A (en) * | 2019-01-17 | 2019-05-28 | 广州兴森快捷电路科技有限公司 | Slot processing method and circuit board |
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-
2021
- 2021-11-30 CN CN202111452901.0A patent/CN114147807A/en active Pending
Patent Citations (9)
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| CN104772648A (en) * | 2015-04-09 | 2015-07-15 | 西安工业大学 | Milling processing method for thin-wall workpiece of airplane |
| CN104816026A (en) * | 2015-05-05 | 2015-08-05 | 柳州玲通科技有限责任公司 | Thin-wall part processing method |
| CN106338965A (en) * | 2016-10-25 | 2017-01-18 | 哈尔滨理工大学 | Error compensation based corner processing precision control method |
| CN108568539A (en) * | 2017-03-07 | 2018-09-25 | 惠州中京电子科技有限公司 | A kind of ultrashort groove processing methods of PCB |
| CN109819593A (en) * | 2019-01-17 | 2019-05-28 | 广州兴森快捷电路科技有限公司 | Slot processing method and circuit board |
| CN110421406A (en) * | 2019-07-14 | 2019-11-08 | 深圳市烨嘉为技术有限公司 | Cutter dynamic self-adapting compensation method based on centering error control |
| CN113043374A (en) * | 2019-12-26 | 2021-06-29 | 北大方正集团有限公司 | Ultrashort slotted hole processing method for circuit board |
| CN113301724A (en) * | 2021-05-24 | 2021-08-24 | 福莱盈电子股份有限公司 | Method for processing short slot hole of rigid-flex board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117119694A (en) * | 2023-10-23 | 2023-11-24 | 四川英创力电子科技股份有限公司 | Processing technology for printed circuit board superposition drilling and milling |
| CN117641742A (en) * | 2023-12-20 | 2024-03-01 | 皆利士多层线路版(中山)有限公司 | Process for square and round slot holes of circuit board |
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