CN104259502A - Machining method of short slotted hole of PCB (printed circuit board) - Google Patents

Machining method of short slotted hole of PCB (printed circuit board) Download PDF

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Publication number
CN104259502A
CN104259502A CN201410383198.6A CN201410383198A CN104259502A CN 104259502 A CN104259502 A CN 104259502A CN 201410383198 A CN201410383198 A CN 201410383198A CN 104259502 A CN104259502 A CN 104259502A
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CN
China
Prior art keywords
slotted eye
short
short slotted
slotted hole
length direction
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Granted
Application number
CN201410383198.6A
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Chinese (zh)
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CN104259502B (en
Inventor
魏楚
贺波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Aoshikang Polytron Technologies Inc
Aoshikang Technology Co Ltd
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AOSHIKANG TECHNOLOGY (YIYANG) Co Ltd
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Priority to CN201410383198.6A priority Critical patent/CN104259502B/en
Publication of CN104259502A publication Critical patent/CN104259502A/en
Application granted granted Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/16Perforating by tool or tools of the drill type

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

The invention discloses a machining method of a short slotted hole of a PCB (printed circuit board). The machining method prevents the slotted hole from deformation and deviation in a machining process of the short slotted hole with a short diameter less than 1.0mm. The machining method is characterized by comprising the following steps of: (1) drilling two guide holes in a corresponding edge in a length direction of the short slotted hole to be formed, (2) drilling a hole at one end, in the length direction, of the short slotted hole, and another hole at the other corresponding end with a drill point of which the diameter is equal to the short diameter of the slotted hole, allowing the two holes to be internally tangent with the edge of the short slotted hole in the length direction, and (3) carrying out overlap drilling in the length direction of the short slotted hole, wherein the diameter of the guide holes is (the short diameter of the slotted hole minus 0.1)/2mm-(the short diameter of the slotted hole minus 0.25)mm; an anticlockwise included angle alpha between a line of centers of the two guide holes and a center line of the slotted hole in the length direction is 10-35 degrees; and a distance between the edges of each guide hole and the short slotted hole is 1-3mil. The method effectively avoids quality problems such as deformation of the short slotted hole in the machining process of the minor-diameter short slotted hole, increases a finished product yield of the PCB and lowers production cost of an enterprise.

Description

The short slotted eye processing method of pcb board
Technical field
The present invention relates to a kind of processing method of pcb board slotted eye, the specifically short slotted eye processing method of pcb board, particularly relates to a kind of slotted eye minor axis < 1.0 ㎜ and the short slotted eye processing method of pcb board of flute length/groove footpath < 2.
Background technology
In the slotted eye processing of pcb board (printed circuit board (PCB)), particularly when processing the short slotted eye of flute length/groove footpath < 2 times, generally formed by after the boring of multiple circular hole overlap, namely the drill point adopting diameter to equal slotted eye minor axis during boring bores a hole in short slotted eye one end along its length, bore a hole at the other end of correspondence again, then bore along folded on the length direction of short slotted eye.Due to when the other end boring of short slotted eye, one end of short slotted eye is drill-through, drill point cannot borrow power, when drill point clockwise High Rotation Speed (50000 revs/min ~ 60000 revs/min), apex point knife face produces torsion left, and torsion is greater than the resistance of base material to drill point, thus cause not boring substrate regions to the active force being greater than the left side on the right of drill point generation, thus make the short slotted eye distortion after processing, center along slotted eye length direction offsets 5 ° ~ about 15 ° counterclockwise, as slotted eye minor axis < 1.0 ㎜, its phenomenon is more obviously given prominence to, when particularly processing multi-disc plate at the same time, base plate skew is more serious, cause the finished product yield of PCB plate low, increase production cost.
To this, have when making boring formula, in advance to the angle compensation that short slotted eye carries out to the right, but, when folded brill, because base material remainder is less, also less to apex point active force, the default location after angle compensation can be dropped in the lower brill position of apex point, easily occurs broad bean type slotted eye (special-shaped slotted eye).
Application number is 201010509170.4, the applying date is 2010.10.14, denomination of invention is the method that application discloses the quality problem such as a kind of distortion can effectively avoided in short slotted eye process, groove is large, groove is little of the preparation method of the short slotted eye of a kind of PCB plate, namely in the two edges of the length direction of slotted eye figure, a guide hole is bored respectively, and guide hole diameter is less than the half of slotted eye major diameter, the brill then adopting diameter to equal slotted eye minor axis on guide hole basis is chewed and is carried out superposition boring.Equally, during due to folded brill, its slotted eye is drill-through on one side, drill point cannot borrow power, when drill point clockwise High Rotation Speed (50000 revs/min ~ 60000 revs/min), do not bore substrate regions is greater than left side active force to drill point generation the right, still cause the short slotted eye after processing to deform, the center along slotted eye length direction offsets 5 ° ~ about 15 ° counterclockwise.Simultaneously, due to the edge inscribe of its guide hole and short slotted eye, after first circular hole of short slotted eye has bored, when boring under second circular hole, base material can produce the active force under being greater than to drill point at short slotted eye length direction, cause short slotted eye length can about 0.1 ㎜ shorter in former design length, thus guide hole cannot be covered completely, make the salient point (i.e. guide hole position) that not boring completely appears in short slotted eye edge.
Summary of the invention
The object of this invention is to provide a kind of short slotted eye processing method of pcb board preventing offseting at the short slotted eye process middle slot bore deformation of slotted eye minor axis < 1.0 ㎜.
The present invention adopts following technical scheme to realize its goal of the invention, and the short slotted eye processing method of a kind of pcb board, it comprises the following steps:
(1) in the corresponding edge of waiting out short slotted eye length direction, bore two bullports respectively, slotted eye minor axis < 1.0 ㎜ of described short slotted eye and flute length/groove footpath < 2, the aperture of described bullport is (slotted eye minor axis-0.1)/2 ㎜ ~ (slotted eye minor axis-0.25) ㎜, the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 10 ° ~ 35 °, and the distance at described bullport and short slotted eye edge is 1 ㏕ ~ 3 ㏕;
(2) the drill point adopting diameter to equal slotted eye minor axis bores a hole in short slotted eye one end along its length, then bores a hole at the other end of correspondence, holes respectively with the edge inscribe of short slotted eye length direction;
(3) then along the folded brill of length direction of short slotted eye.
The present invention is when flute length/groove footpath≤1.3, and described α angle is preferably 29 ° ~ 35 °.
The present invention is when 1.3 < flute length/groove footpath≤1.5, and described α angle is preferably 17 ° ~ 28 °.
The present invention is as 1.5 < flute length/groove footpath < 2, and described α angle is preferably 10 ° ~ 16 °.
The aperture of bullport of the present invention is preferably slotted eye minor axis/2 ㎜.
The distance at bullport of the present invention and short slotted eye edge is preferably 2 ㏕.
Folded brill of the present invention is the length direction along short slotted eye, alternately folds toward center bore from two ends.
Owing to adopting technique scheme, the present invention achieves goal of the invention preferably, by arranging bullport the both sides of short slotted eye length direction center line are oblique, effectively prevent the quality problem such as the short slotted eye distortion in path short slotted eye process, improve the finished product yield of PCB plate, reduce enterprise's production cost.
Accompanying drawing explanation
Fig. 1 is prior art short slotted eye work flow schematic diagram;
Fig. 2 is short slotted eye work flow schematic diagram when in advance carrying out angle compensation to short slotted eye in prior art;
Fig. 3 is short slotted eye work flow schematic diagram when arranging guide hole in prior art;
Fig. 4 is short slotted eye work flow schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, in the processing of short slotted eye, be generally formed by after the boring of multiple circular hole overlap, the drill point namely adopting diameter to equal slotted eye minor axis during boring bores a hole in short slotted eye one end along its length, bore a hole at the other end of correspondence again, then bore along folded on the length direction of short slotted eye.Due to when the other end boring of short slotted eye, one end of short slotted eye is drill-through, drill point cannot borrow power, when drill point clockwise High Rotation Speed (50000 revs/min ~ 60000 revs/min), apex point knife face produces torsion left, and torsion is greater than the resistance of base material to drill point, thus cause not boring substrate regions to the active force being greater than the left side on the right of drill point generation, thus make the short slotted eye distortion after processing, center along slotted eye length direction offsets 5 ° ~ about 15 ° counterclockwise, as slotted eye minor axis < 1.0 ㎜, its phenomenon is more obviously given prominence to, when particularly processing multi-disc plate at the same time, base plate skew is more serious.
As shown in Figure 2, the distortion in man-hour is added for solving short slotted eye, have when making boring formula, in advance to the angle compensation that short slotted eye carries out to the right, but, when folded brill, because base material remainder is less, also less to apex point active force, the default location after angle compensation can be dropped in the lower brill position of apex point, easily occurs broad bean type slotted eye (special-shaped slotted eye).
As shown in Figure 3, the distortion in man-hour is added for solving short slotted eye, application number is 201010509170.4, the applying date is 2010.10.14, denomination of invention be the patent application of the preparation method of the short slotted eye of a kind of PCB plate provide a kind of length direction at slotted eye figure two edges in bore a guide hole respectively, and guide hole diameter is less than the half of slotted eye major diameter, the brill then adopting diameter to equal slotted eye minor axis on guide hole basis is chewed and is carried out superposition boring.Equally, during due to folded brill, its slotted eye is drill-through on one side, drill point cannot borrow power, when drill point clockwise High Rotation Speed (50000 revs/min ~ 60000 revs/min), do not bore substrate regions is greater than left side active force to drill point generation the right, still cause the short slotted eye after processing to deform, the center along slotted eye length direction offsets 5 ° ~ about 15 ° counterclockwise.Simultaneously, due to the edge inscribe of its guide hole and short slotted eye, after first circular hole of short slotted eye has bored, when boring under second circular hole, base material can produce the active force under being greater than to drill point at short slotted eye length direction, cause short slotted eye length can about 0.1 ㎜ shorter in former design length, thus guide hole cannot be covered completely, make the salient point (i.e. guide hole position) that not boring completely appears in short slotted eye edge.
Embodiment 1:
As shown in Figure 4, the short slotted eye processing method of a kind of pcb board, it comprises the following steps:
(1) in the corresponding edge of waiting out short slotted eye length direction, bore two bullports respectively, slotted eye minor axis < 1.0 ㎜ of described short slotted eye and flute length/groove footpath < 2, the aperture of described bullport is (slotted eye minor axis-0.1)/2 ㎜ ~ (slotted eye minor axis-0.25) ㎜, the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 10 ° ~ 35 °, and the distance at described bullport and short slotted eye edge is 1 ㏕ ~ 3 ㏕;
The aperture of bullport of the present invention is preferably slotted eye minor axis/2 ㎜.
The distance at bullport of the present invention and short slotted eye edge is preferably 2 ㏕.
(2) the drill point adopting diameter to equal slotted eye minor axis bores a hole in short slotted eye one end along its length, then bores a hole at the other end of correspondence, holes respectively with the edge inscribe of short slotted eye length direction;
(3) then along the folded brill of length direction of short slotted eye.
Folded brill of the present invention is the length direction along short slotted eye, alternately folds toward center bore from two ends.
The present invention is when 1.3 < flute length/groove footpath≤1.5, and described α angle is preferably 17 ° ~ 28 °.
The present embodiment slotted eye minor axis is 0.6 ㎜, slotted eye major diameter/slotted eye minor axis is 1.5, the aperture of bullport is preferably 0.3 ㎜, the distance at described bullport and short slotted eye edge is preferably 2 ㏕, as shown in Figure 4, one hole is centrally located at the lower left quarter of short slotted eye length direction, and another hole is centrally located at the upper right quarter of short slotted eye length direction, and the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 17 °.
Add man-hour, make boring formula according to designing requirement, formula of holing imports drilling machine.Drilling machine carries out bore operation by instruction, first processes bullport, then one end of the short slotted eye of subdrilling, then bores a circular hole at the other end of short slotted eye, then along the length direction of short slotted eye, from two ends toward middle alternately folded brill.
Owing to being provided with certain distance (the present embodiment is 2 ㏕) between bullport and short slotted eye edge, when making to bore under the second hole, namely can not produce at short slotted eye edge and not bore salient point (bullport position), the effect playing the short slotted eye of correcting can be ensured again.
Embodiment 2:
The present invention is when flute length/groove footpath≤1.3, and described α angle is preferably 29 ° ~ 35 °.
The present embodiment slotted eye minor axis is 0.6 ㎜, and slotted eye major diameter/slotted eye minor axis is 1.3, and the aperture of bullport is preferably 0.3 ㎜, and the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 31 °.
Remaining with embodiment 1.
Embodiment 3:
The present invention is as 1.5 < flute length/groove footpath < 2, and described α angle is preferably 10 ° ~ 16 °.
The present embodiment slotted eye minor axis is 0.6 ㎜, and slotted eye major diameter/slotted eye minor axis is 1.8, and the aperture of bullport is preferably 0.3 ㎜, and the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 12 °.
Remaining with embodiment 1.

Claims (10)

1. the short slotted eye processing method of pcb board, is characterized in that it comprises the following steps:
(1) in the corresponding edge of waiting out short slotted eye length direction, bore two bullports respectively, slotted eye minor axis < 1.0 ㎜ of described short slotted eye and flute length/groove footpath < 2, the aperture of described bullport is (slotted eye minor axis-0.1)/2 ㎜ ~ (slotted eye minor axis-0.25) ㎜, the line of centres of two bullports and the anticlockwise angle α of slotted eye length direction center line are 10 ° ~ 35 °, and the distance at described bullport and short slotted eye edge is 1 ㏕ ~ 3 ㏕;
(2) the drill point adopting diameter to equal slotted eye minor axis bores a hole in short slotted eye one end along its length, then bores a hole at the other end of correspondence, holes respectively with the edge inscribe of short slotted eye length direction;
(3) then along the folded brill of length direction of short slotted eye.
2. the short slotted eye processing method of pcb board according to claim 1, is characterized in that described α angle is preferably 29 ° ~ 35 ° when flute length/groove footpath≤1.3.
3. the short slotted eye processing method of pcb board according to claim 1, is characterized in that described α angle is preferably 17 ° ~ 28 ° when 1.3 < flute length/groove footpath≤1.5.
4. the short slotted eye processing method of pcb board according to claim 1, is characterized in that described α angle is preferably 10 ° ~ 16 ° as 1.5 < flute length/groove footpath < 2.
5. the short slotted eye processing method of pcb board according to claim 1 or 2 or 3 or 4, is characterized in that the aperture of described bullport is preferably slotted eye minor axis/2 ㎜.
6. the short slotted eye processing method of pcb board according to claim 1 or 2 or 3 or 4, is characterized in that the distance at described bullport and short slotted eye edge is preferably 2 ㏕.
7. the short slotted eye processing method of pcb board according to claim 5, is characterized in that the distance at described bullport and short slotted eye edge is preferably 2 ㏕.
8. the short slotted eye processing method of pcb board according to claim 1 or 2 or 3 or 4, is characterized in that described folded brill is the length direction along short slotted eye, alternately folds toward center bore from two ends.
9. the short slotted eye processing method of pcb board according to claim 5, is characterized in that described folded brill is the length direction along short slotted eye, alternately foldedly toward center from two ends bores.
10. the short slotted eye processing method of pcb board according to claim 7, is characterized in that described folded brill is the length direction along short slotted eye, alternately foldedly toward center from two ends bores.
CN201410383198.6A 2014-08-06 2014-08-06 The short slotted eye processing method of pcb board Active CN104259502B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105128087A (en) * 2015-08-26 2015-12-09 江苏苏杭电子有限公司 Method for processing short slotted hole in printed circuit board
CN106270606A (en) * 2016-08-31 2017-01-04 新野鼎泰电子精工科技有限公司 A kind of PCB short slotted eye boring method
CN106624012A (en) * 2016-12-29 2017-05-10 安徽深泽电子科技有限公司 Manufacturing method of short slotted hole on PCB (Printed Circuit Board)
CN107426917A (en) * 2017-08-31 2017-12-01 惠东县建祥电子科技有限公司 A kind of short slot structures of PTH and preparation method thereof
CN110708896A (en) * 2019-10-18 2020-01-17 生益电子股份有限公司 PIN hole machining method and HDI board manufacturing method
CN110802669A (en) * 2019-10-24 2020-02-18 广州兴森快捷电路科技有限公司 Method for manufacturing connecting hole of circuit board
CN111417261A (en) * 2020-04-14 2020-07-14 高德(江苏)电子科技有限公司 Method for improving tail deformation of short slotted hole in PCB processing
CN111669896A (en) * 2020-04-29 2020-09-15 东莞联桥电子有限公司 Processing method of PCB short slotted hole
CN112616258A (en) * 2021-01-12 2021-04-06 广东世运电路科技股份有限公司 Circuit board negative film and processing method thereof
CN116586652A (en) * 2023-07-04 2023-08-15 淄博芯材集成电路有限责任公司 Reaming manufacturing method for preventing short slot hole of packaging loading plate from being deviated

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CN102612259A (en) * 2012-03-20 2012-07-25 昆山元茂电子科技有限公司 Drilling short slot for printed circuit board
CN102833949A (en) * 2012-09-11 2012-12-19 厦门爱谱生电子科技有限公司 Method for milling groove in FPC (Flexible Printed Circuit)
CN103862515A (en) * 2014-03-07 2014-06-18 九江华祥科技股份有限公司 Method for preparing short slotted hole in printed circuit board

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JPH11284310A (en) * 1998-03-27 1999-10-15 Ibiden Co Ltd Method for boring elliptic hole through printed wiring board
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CN102612259A (en) * 2012-03-20 2012-07-25 昆山元茂电子科技有限公司 Drilling short slot for printed circuit board
CN102833949A (en) * 2012-09-11 2012-12-19 厦门爱谱生电子科技有限公司 Method for milling groove in FPC (Flexible Printed Circuit)
CN103862515A (en) * 2014-03-07 2014-06-18 九江华祥科技股份有限公司 Method for preparing short slotted hole in printed circuit board

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105128087A (en) * 2015-08-26 2015-12-09 江苏苏杭电子有限公司 Method for processing short slotted hole in printed circuit board
CN106270606A (en) * 2016-08-31 2017-01-04 新野鼎泰电子精工科技有限公司 A kind of PCB short slotted eye boring method
CN106270606B (en) * 2016-08-31 2019-03-08 新野鼎泰电子精工科技有限公司 A kind of short slot boring method of PCB
CN106624012A (en) * 2016-12-29 2017-05-10 安徽深泽电子科技有限公司 Manufacturing method of short slotted hole on PCB (Printed Circuit Board)
CN107426917A (en) * 2017-08-31 2017-12-01 惠东县建祥电子科技有限公司 A kind of short slot structures of PTH and preparation method thereof
CN107426917B (en) * 2017-08-31 2020-02-28 惠东县建祥电子科技有限公司 PTH groove structure and manufacturing method thereof
CN110708896A (en) * 2019-10-18 2020-01-17 生益电子股份有限公司 PIN hole machining method and HDI board manufacturing method
CN110802669B (en) * 2019-10-24 2021-06-25 广州兴森快捷电路科技有限公司 Method for manufacturing connecting hole of circuit board
CN110802669A (en) * 2019-10-24 2020-02-18 广州兴森快捷电路科技有限公司 Method for manufacturing connecting hole of circuit board
CN111417261A (en) * 2020-04-14 2020-07-14 高德(江苏)电子科技有限公司 Method for improving tail deformation of short slotted hole in PCB processing
CN111669896A (en) * 2020-04-29 2020-09-15 东莞联桥电子有限公司 Processing method of PCB short slotted hole
CN111669896B (en) * 2020-04-29 2023-10-27 东莞联桥电子有限公司 Processing method of PCB short slot
CN112616258A (en) * 2021-01-12 2021-04-06 广东世运电路科技股份有限公司 Circuit board negative film and processing method thereof
CN112616258B (en) * 2021-01-12 2022-06-17 广东世运电路科技股份有限公司 Circuit board negative film and processing method thereof
CN116586652A (en) * 2023-07-04 2023-08-15 淄博芯材集成电路有限责任公司 Reaming manufacturing method for preventing short slot hole of packaging loading plate from being deviated
CN116586652B (en) * 2023-07-04 2024-05-07 淄博芯材集成电路有限责任公司 Reaming manufacturing method for preventing short slot hole of packaging loading plate from being deviated

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Address after: 413001 Changchun Industrial Park, Ziyang District, Hunan, Yiyang

Patentee after: AOSHIKANG TECHNOLOGY Co.,Ltd.

Address before: 413001 Changchun Industrial Park, Ziyang District, Hunan, Yiyang

Patentee before: Hunan aoshikang Polytron Technologies Inc.

Address after: 413001 Changchun Industrial Park, Ziyang District, Hunan, Yiyang

Patentee after: Hunan aoshikang Polytron Technologies Inc.

Address before: 413001 Changchun Industrial Park, Ziyang District, Hunan, Yiyang

Patentee before: AOSHIKANG TECHNOLOGY (YIYANG) Co.,Ltd.