CN202551489U - Printed circuit board bored short slot - Google Patents
Printed circuit board bored short slot Download PDFInfo
- Publication number
- CN202551489U CN202551489U CN201220104542XU CN201220104542U CN202551489U CN 202551489 U CN202551489 U CN 202551489U CN 201220104542X U CN201220104542X U CN 201220104542XU CN 201220104542 U CN201220104542 U CN 201220104542U CN 202551489 U CN202551489 U CN 202551489U
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- Prior art keywords
- slot
- slotted eye
- printed circuit
- short
- circuit board
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Abstract
The utility model belongs to the machining field of printed circuit boards, particularly a printed circuit board bored short slot, which is characterized in that the short slot is positioned on a printed circuit board. The two ends of a position to be bored with a short slot are provided with two guiding holes along the central line of the short slot. The guiding holes are tangent to longer edge of the short slot and are circular holes symmetrically arranged relative to the central line of the short slot. The two guiding holes are arranged at intervals. The guiding holes and the short slot are machined by a drill bit and a slot mill respectively and the drill bit and the slot mill are the same with each other in diameter. When the ratio of the length to the diameter of a slot is smaller than 2.0, the slot is adopted as a short slot. The printed circuit board bored short slot is machined in the drilling mode and two guiding holes are firstly drilled at the two ends of the short slot along the central line of the short slot. The apertures of the guiding holes are L 1/2-2 mil (wherein L is the length of the slot and mil is the unit thereof). The guiding holes must be tangent to the longer edge of the slot so as to ensure the length of the slot by means of the guiding holes, while the deflection of the slot is effectively avoided. Meanwhile, the rework cost and the cost of spoiled products due to undesirable slots are reduced, and the yield of PCB boards is improved.
Description
Technical field
The utility model belongs to the printed circuit board (PCB) manufacture field, and what be specifically related to is the short slotted eye of a kind of printed circuit board drilling, and this short slotted eye uses special processing method, the stressed short partially and crooked problem of length that causes when having overcome short slotted eye because of boring.
Background technology
Along with development of integrated circuits, the also raising thereupon of requirement to the integrated circuit encapsulation wherein also develops to higher wiring density, better electrical property and hot property direction the also requirement that encapsulates the printed circuit board (PCB) (pcb board) that uses.For reaching above-mentioned requirements, technology such as exploitation high reliability via, the short slotted eye of boring processing are crucial, and it all has very big influence to the density of wiring and the efficient of encapsulation back electricity, hot property and processing.
In the PCB manufacture process; PCB boring processing is the manufacturing procedure that belongs to leading portion, and at this moment, pcb board internal layer circuit operation is all accomplished; The defective pcb board qualification rate that not only makes of PCB boring processing declines to a great extent, and the not good general who produces after the entering subsequent handling can't repair and mend the , cost of spoiled goods also is the highest.And in the existing pcb board design, length-width ratio is the twice in normal hole less than 2.0 short groove hole , length direction compensation, but short slotted eye is adding man-hour, because the stressed problem of groove cutter still the problem that slotted eye is crooked and length shortens can occur.
The utility model content
In view of the above-mentioned deficiency that exists on the prior art; The utility model purpose is to be to provide that a kind of length is normal, the short slotted eye of the printed circuit board drilling of slotted eye calibration; Overcome existing short slotted eye because of the stressed short partially and crooked defective of length that causes, improved the qualification rate of printed circuit board (PCB).
To achieve these goals, the utility model is to realize through following technical scheme: the short slotted eye of printed circuit board drilling, and it is characterized in that: described short slotted eye is positioned on the printed circuit board (PCB); According to short slotted eye center line two guide holes are set at the two ends of waiting out short slotted eye position, guide hole is tangent with the long limit of short slotted eye.
The short slotted eye of aforesaid printed circuit board drilling, described guide hole is a circular hole, is symmetrical set along the slotted eye center line.
The short slotted eye of aforesaid printed circuit board drilling, described two guide holes are to be provided with at interval.
The short slotted eye of aforesaid printed circuit board drilling, described guide hole is processed by drill bit and groove cutter with diameter respectively with short slotted eye.
Aforesaid printed circuit board drilling is lacked slotted eye, and described short slotted eye is meant that length/diameter compares the slotted eye less than 2.0.
The beneficial effect of the utility model: adopt the bore operation mode; Lacking the slotted eye two ends according to slotted eye center line subdrilling two guide holes; The guide hole aperture for for L1/2-2mil (L is a flute length, unit be mil) ﹐ guide hole must with the long limit of slotted eye Xiang Qie ﹐ can guarantee slotted eye length through guide hole, also can effectively solve the crooked problem of slotted eye; Reduced heavy industry cost and cost of spoiled goods, improved pcb board product yield because of bad generation.
Description of drawings
Specify the utility model below in conjunction with accompanying drawing and embodiment;
Fig. 1 is the structural representation of the utility model;
Wherein, 1 guide hole, 2 short slotted eyes.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with embodiment, further set forth the utility model.
Embodiment:
Referring to Fig. 1; The short slotted eye of the printed circuit board drilling of the utility model; According to two guide holes 1 of short slotted eye center lines boring processing 2 diametric perpendicular to short slotted eye, that be positioned at short slotted eye 2 central authorities, guide hole 1 be a circular hole at the two ends of waiting out short slotted eye 2 positions, and edge weak point slotted eye center line is symmetrical set; Bore short slotted eye 2 afterwards, guide hole 1 is tangent with the long limit of short slotted eye.Guide hole 1 is the circular hole of diameter (L1/2-2mil), and L is the length of short slotted eye 2, and promptly diameter is that half of slotted eye length deducts 2mil again.This circuit board gets out two circular holes through the drill bit of (L1/2-2mil) diameter, and two circular holes (radial spacing is 4mil) at regular intervals are not but tangent, and after having bored guide hole 1, boring length again is the short slotted eye 2 of L; Said short slotted eye 2 is processed by the groove cutter of same diameter (L1/2-2mil), can avoid like this causing the not enough and crooked problem of short slotted eye 2 length because of stressed problem.
Present embodiment is when process operation, and the detail operations step of the concrete processing of this circuit board is following:
(1) transfers pin program of establishing (being used for fixing pcb board) and drilling program at the computer that is used for the keyhole machine to drilling machine;
(2) the pin program is established in execution, plants pin (beat locking pin and go into wood-pulp board and circuit board);
(3) upper plate; The staff installs wood-pulp board and circuit board to drilling machine, and when upper plate, its program and points for attention are: Board position in lid aluminium flake, viscose glue, the affirmation.
(4) boring; The staff carries out drilling program, and circuit board is carried out bore operation.
(5) lower plate, with bored the hole pcb board take off, just accomplish the operation of the short slotted eye of boring processing then.
Based on above-mentioned; Present embodiment is through establishing pin program and drilling program; Zuan Tou , by drilling machine chuck gripping diameter (L1/2-2mil) carries out guide hole processing to the pcb board of the short slotted eye of boring processing then; And the groove cutter through original diameter (L1/2-2mil) holes to short slotted eye, with short slotted eye be processed as length normal with not crooked short slotted eye.The utility model adopts the bore operation mode, and each short slotted eye two ends respectively adds a guide hole, avoid slotted eye because of stressed cause length short partially and crooked, change lamination and reduce production capacity efficient because of lacking partially.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (5)
1. printed circuit board drilling is lacked slotted eye, and it is characterized in that: described short slotted eye is positioned on the printed circuit board (PCB); According to short slotted eye center line two guide holes are set at the two ends of waiting out short slotted eye position, guide hole is tangent with the long limit of short slotted eye.
2. the short slotted eye of printed circuit board drilling according to claim 1, it is characterized in that: described guide hole is a circular hole, is symmetrical set along the slotted eye center line.
3. the short slotted eye of printed circuit board drilling according to claim 2 is characterized in that: described two guide holes are for be provided with at interval.
4. the short slotted eye of printed circuit board drilling according to claim 1 is characterized in that: described guide hole is processed by drill bit and groove cutter with diameter respectively with short slotted eye.
5. printed circuit board drilling according to claim 1 is lacked slotted eye, it is characterized in that: described short slotted eye is meant that length/diameter compares the slotted eye less than 2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220104542XU CN202551489U (en) | 2012-03-20 | 2012-03-20 | Printed circuit board bored short slot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220104542XU CN202551489U (en) | 2012-03-20 | 2012-03-20 | Printed circuit board bored short slot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202551489U true CN202551489U (en) | 2012-11-21 |
Family
ID=47172043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220104542XU Expired - Fee Related CN202551489U (en) | 2012-03-20 | 2012-03-20 | Printed circuit board bored short slot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202551489U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104526064A (en) * | 2014-12-01 | 2015-04-22 | 韶关好特利电子有限公司 | Method for processing short slot with length less than doubled tool diameter |
| CN105744765A (en) * | 2016-03-15 | 2016-07-06 | 江门崇达电路技术有限公司 | Method for manufacturing short slot hole in PCB |
-
2012
- 2012-03-20 CN CN201220104542XU patent/CN202551489U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104526064A (en) * | 2014-12-01 | 2015-04-22 | 韶关好特利电子有限公司 | Method for processing short slot with length less than doubled tool diameter |
| CN105744765A (en) * | 2016-03-15 | 2016-07-06 | 江门崇达电路技术有限公司 | Method for manufacturing short slot hole in PCB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20150320 |
|
| EXPY | Termination of patent right or utility model |