CN104149125B - A kind of detection method of PCB mechanical drilling machine borehole accuracy - Google Patents
A kind of detection method of PCB mechanical drilling machine borehole accuracy Download PDFInfo
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- CN104149125B CN104149125B CN201310176374.4A CN201310176374A CN104149125B CN 104149125 B CN104149125 B CN 104149125B CN 201310176374 A CN201310176374 A CN 201310176374A CN 104149125 B CN104149125 B CN 104149125B
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
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- 229920001568 phenolic resin Polymers 0.000 claims description 5
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- 229920000877 Melamine resin Polymers 0.000 claims description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 claims description 3
- -1 phenolic aldehyde Chemical class 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
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- 239000000835 fiber Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
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Abstract
The invention provides a kind of detection method of PCB mechanical drilling machine borehole accuracy, comprise the following steps: a, get pcb board, cover plate and backing plate ready, and be drilled with pin hole respectively; B, sequentially that cover plate, pcb board, backing plate is superimposed to form a superimposed body, and each self-corresponding pin hole is coaxially placed, superimposed body be provided with a pin and make this pin through pin hole, then by a gripping apparatus grips pin, more superimposed body being placed on the workbench of PCB mechanical drilling machine; C, PCB mechanical drilling machine inputs machined parameters and holes; D, take off the superimposed body after boring, and the cover plate of this superimposed body, pcb board and backing plate are split; Residue residual in Drilling operation on e, removing pcb board; F, by image detection device, variance analysis is carried out to the boring on pcb board; G, pass judgment on the deviate drawn by image detection device.Detection method of the present invention is simple and convenient, and testing result is comparatively accurate.
Description
Technical field
The present invention relates to PCB mechanical drilling machine field, particularly relate to a kind of detection method of PCB mechanical drilling machine borehole accuracy.
Background technology
At present, for the method for PCB mechanical drilling machine borehole accuracy also neither one standard.Wherein, Some Enterprises adopts traverse drill to bore the detection method of copper plate, is specially, and utilizes copper plate as detection sheet material, then is holed on copper plate by traverse drill, then check position, the hole precision that copper plate gets out, judge the borehole accuracy of rig with this.Because copper plate is homogeneous, can avoid the situation occurring unbalance stress during bit drills composite, and the thick sword of traverse drill core is short, rigidity and concentricity are all better than normal drill bit, can effectively prevent from occurring the situation that drill bit beat is excessive during boring., this kind of method also exists some shortcomings, first, the angularity of pcb board is little relative to the angularity of copper plate, therefore, when copper plate substitutes pcb board detection use, be difficult to the angularity standard reaching pcb board, like this, easily cause borehole accuracy and testing result and occur larger deviation; Secondly, traverse drill is compared with normal drill bit, and it is on the high side, sword length is partially short, Drilling operation efficiency is lower, and the most important thing is, client is when actual production is holed, and the overwhelming majority adopts normal drill bit.
In addition, domestic also have Some Enterprises according to its actual production boring processing procedure needs, the method of detect aperture position precision after employing brill production plate, if publication number is applying for a patent of 101726245A, it discloses a kind of PCB drilling machine method for analyzing borehole deviation, the program is analyzed the position, hole after processing mainly through Quadratic Finite Element detector, although it is easy to operate, accumulate a large amount of practical experiences without the need to technical staff can judge, also do not need to take multiple measurements to grope problem place to PCB drilling machine, but, but have ignored pcb board in reality boring, because its base material is mainly epoxy resin fiber cloth, it can produce hole burr, and these burrs can cause the situation occurring judging or judging by accident position, hole during Quadratic Finite Element detector accuracy of detection, and then affect testing result.
Therefore, be necessary to provide a kind of technological means to address the aforementioned drawbacks.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of detection method of PCB mechanical drilling machine borehole accuracy is provided, there is to solve current PC B mechanical drilling machine borehole accuracy the problem that detection accuracy is not high, testing cost is larger.
The present invention is achieved in that a kind of detection method of PCB mechanical drilling machine borehole accuracy, comprises the following steps:
A, get pcb board, cover plate and backing plate ready, and be drilled with respectively the second pin hole, described cover plate be drilled with on the first pin hole and described backing plate on described pcb board and be drilled with the 3rd pin hole, and the aperture of this first pin hole, the second pin hole and the 3rd pin hole is identical;
B, sequentially that described cover plate, described pcb board, described backing plate is superimposed to form a superimposed body, and the center of described first pin hole making described cover plate, described pcb board, described backing plate corresponding, described second pin hole, described 3rd pin hole on the same line, described superimposed body is provided with a pin and makes this pin through described first pin hole, described second pin hole and described 3rd pin hole, then clamp described superimposed body by a clamping device by the described pin of clamping, more described superimposed body is placed on the workbench of PCB mechanical drilling machine;
C, on described PCB mechanical drilling machine, input machined parameters, and make described PCB mechanical drilling machine on described superimposed body, process the boring of assigned address;
D, take off the described superimposed body after boring, and the cover plate of this superimposed body, pcb board and backing plate are split;
E, to remove on described pcb board residue residual in Drilling operation;
F, by image detection device, variance analysis is carried out to the boring on described pcb board;
G, pass judgment on the deviate drawn by described image detection device, if this deviate is in the deviation range of specifying, then end operation; If this deviate is not in the deviation range of specifying, then investigates each step correctness and judge test problems, then repeating step b to step g.
Particularly, in step c, described PCB mechanical drilling machine is provided with a coordinate system in the surface of described superimposed body, and optionally hole in the X-axis of this coordinate system and one of them axle of Y-axis, then, another axle of this coordinate system is holed, finally, except holing in other position in X-axis, Y-axis on this coordinate system;
Further, when described PCB mechanical drilling machine is holed on the coordinate system of described superimposed body, using the initial point of this coordinate system as relative position, according to the bore position of specifying from far near to and fro in X-axis, in Y-axis and except X-axis, Y-axis other position hole;
Further, in step c, the drill speed of described PCB mechanical drilling machine is 25-65Krpmin, and feed speed is 1.0-2.6m/min, and withdrawing speed is 12-24m/min.
Particularly, in step e, described pcb board removes residue by air gun or plasma cleaner.
Particularly, in step f, described image detection device is Quadratic Finite Element detector.
Particularly, described pcb board is FR4H/H, and its Tg is 130-150 DEG C, and thickness of slab is 1.0-1.6mm.
Particularly, described cover plate is aluminum foil plate, phenolic aldehyde cardboard or phenol cardboard, and the thickness of slab of this cover plate is 0.13-0.18mm; Described cover plate is attached to the upper surface of described pcb board by U.S. line paper.
Particularly, described backing plate is phenolic resins plate, melamine plate, laminated paper board, wood fibre board or aluminium base, and the thickness of slab of this backing plate is 2.5mm.
Particularly, the drill bit of described PCB mechanical drilling machine is integral type drill bit.
Technique effect of the present invention is: detection method of the present invention is by being superimposed with cover plate, backing plate respectively to form a superimposed body in the upper and lower surface of pcb board, by pin, this superimposed body is fixed again, to make pcb board when Drilling operation, comparatively serious burr can not be produced, like this, when image detection device detects, the impact of burr can not be subject to and occur the situation that cannot judge or judge by accident, ensureing to detect carrying out smoothly and obtaining testing result comparatively accurately of operation.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the detection method of PCB mechanical drilling machine borehole accuracy of the present invention;
The structural representation of the detection sheet material that the detection method that Fig. 2 is PCB mechanical drilling machine borehole accuracy of the present invention adopts.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to shown in Fig. 1 and Fig. 2, the invention provides a kind of detection method of PCB mechanical drilling machine borehole accuracy, comprise the following steps:
A, get pcb board 30, cover plate 20 and backing plate 40 ready, and be drilled with respectively the second pin hole 31, described cover plate 20 be drilled with on the first pin hole 21 and described backing plate 40 on described pcb board 30 and be drilled with the 3rd pin hole 41, and the aperture of this first pin hole 21, second pin hole 31 and the 3rd pin hole 41 is identical; By the aperture of the first pin hole 21, second pin hole 31 and the 3rd pin hole 41 is arranged identical, not only be convenient to processing, as long as the pin of same model can mate with the first pin hole 21, second pin hole 31 and the 3rd pin hole 41 and be connected, simplify mounting structure.
B, sequentially by described cover plate 20, described pcb board 30, described backing plate 40 is superimposed to form a superimposed body 10, and make described cover plate 20, described pcb board 30, described first pin hole 21 of described backing plate 40 correspondence, described second pin hole 31, the center of described 3rd pin hole 41 on the same line, described superimposed body 10 is provided with a pin 50 and makes this pin 50 through described first pin hole 21, described second pin hole 31 and described 3rd pin hole 41, then described superimposed body 10 is clamped by a clamping device by the described pin 50 of clamping, again described superimposed body 10 is placed on the workbench of PCB mechanical drilling machine, wherein, cover plate 20 is the upper surfaces being placed in pcb board 30, for the protection of pcb board 30 and drill bit, guides, cleans drill bit, and the heat produced when dredging boring, backing plate 40 is the lower surfaces being placed in pcb board 30, for carrying pcb board 30, and protection pcb board 30 and drill bit, and the heat produced when dredging boring,
C, on described PCB mechanical drilling machine, input machined parameters, and make described PCB mechanical drilling machine on described superimposed body, process the boring of assigned address;
D, take off the described superimposed body 10 after boring, and the cover plate 20 of this superimposed body 10, pcb board 30 and backing plate 40 are split;
E, to remove on described pcb board 30 residue residual in Drilling operation;
F, by image detection device, variance analysis is carried out to the boring on described pcb board 30;
G, pass judgment on the deviate drawn by described image detection device, if this deviate is in the deviation range of specifying, then end operation; If this deviate is not in the deviation range of specifying, then investigates each step correctness and judge test problems, then repeating step b to step g.
Detection method of the present invention is by being superimposed with cover plate 20, backing plate 40 respectively to form a superimposed body 10 in the upper and lower surface of pcb board 30, by pin 50, this superimposed body 10 is fixed again, to make pcb board 30 when Drilling operation, comparatively serious burr can not be produced, like this, when image detection device detects, the impact of burr can not be subject to and occur the situation that cannot judge or judge by accident, ensureing to detect carrying out smoothly and obtaining testing result comparatively accurately of operation.
Particularly, in step c, described PCB mechanical drilling machine is provided with a coordinate system in the surface of described superimposed body 10, and optionally hole in the X-axis of this coordinate system and one of them axle of Y-axis, then, another axle of this coordinate system is holed, finally, except holing in other position in X-axis, Y-axis on this coordinate system; By first carrying out Drilling operation in a reference axis, and then Drilling operation is carried out in another reference axis, finally, except carrying out Drilling operation in X-axis, other position in Y-axis, make whole superimposed body 10 uniform force, like this, the vibration influence of PCB mechanical drilling machine to superimposed body can be reduced preferably, effectively reduce pcb board 30 and occur warping phenomenon, thus ensure the accuracy that PCB mechanical drilling machine borehole accuracy is measured.Preferably, when described PCB mechanical drilling machine is holed on the coordinate system of described superimposed body, using the initial point of this coordinate system as relative position, according to the bore position of specifying from far near to and fro in X-axis, in Y-axis and except X-axis, Y-axis position hole, thus, superimposed body 10 can be made stressed evenly, the vibration caused under the positioning precision problem of examination PCB mechanical drilling machine X-axis, Y-axis and various motion operating mode further affects situation to borehole accuracy.
In addition, in step c, the drill speed of described PCB mechanical drilling machine is 25-65Krpmin, and feed speed is 1.0-2.6m/min, and withdrawing speed is 12-24m/min.
Particularly, in step e, described pcb board 30 removes residue by air gun or plasma cleaner.Wherein, air gun is conventional removing means, simple to operate, convenient and swift.Certainly, if remove residue better, can select to adopt plasma cleaner.Wherein, plasma cleaner (plasmacleaner) be also Surface Treatment with Plasma instrument, is a kind of brand-new high-tech technology, utilizes plasma to be beyond one's reach effect to reach Conventional cleaning method.Plasma is a kind of state of material, is also called the 4th state of material.Ionization is made it to the energy that gas exerts is enough and just becomes plasmoid." activity " component of plasma comprises: the nucleic (metastable state), photon etc. of ion, electronics, active group, excitation state.Plasma cleaner is exactly by utilizing the character of these active components to come processing sample surface, thus realizes the objects such as clean.
In step f, described image detection device is Quadratic Finite Element detector.Wherein, Quadratic Finite Element detector belongs to two-dimensional measurement, similar with the principle of projecting apparatus; But different data handling systems has different survey calculation methods, Quadratic Finite Element detector, be generally by CCD image got in computer to carry out survey calculation.Like this, when utilizing Quadratic Finite Element detector to detect analysis, it is first got image in computer by CCD, and then this image is carried out digitized processing to obtain desired data.
Preferably, described pcb board 30 is FR4H/H, and its Tg is 130-150 DEG C, and thickness of slab is 1.0-1.6mm.The pcb board application of this kind of specification is comparatively general, is convenient to draw materials, in addition, if Tg is higher, namely glass transition temperature is larger, then the rigidity of pcb board, fragility are larger, like this, not only raise the cost, also can strengthen boring difficulty, therefore the Tg of pcb board 30 being 130-150 DEG C, is ideal detection sheet material.
Particularly, described cover plate 20 is aluminum foil plate, phenolic aldehyde cardboard or phenol cardboard, and the thickness of slab of this cover plate 20 is 0.13-0.18mm; Described cover plate 20 is attached to the upper surface of described pcb board by U.S. line paper.
Wherein, aluminium foil cover plate, comprise aluminum foil plate of resinizing, clad aluminum foil plate etc., be used for the Drilling operation of Special Category and universal PCBN plate, although its thermal conductivity factor is large, thermal diffusivity good, its price is higher, and heat resistance is poor, add and can produce acidifying aluminium attachment drill bit man-hour, affect drilling quality.
Paper phenol cover plate, is made up through adding hot pressing of wood-fibred paper impregnated phenolic resin, and the degree of accuracy of its boring is better, produces dust less during boring, but its surface is comparatively hard and too smooth, and easily cause drill slipping phenomenon, its thin plate planarization is poor, and warpage is large.
Phenol paper cover plate, although it is less to the wearing and tearing of drill bit, the dust produced during Drilling operation is less, and its flatness is relatively poor, and thermal diffusivity is poor.
Particularly, described backing plate 40 is phenolic resins plate, melamine plate, laminated paper board, wood fibre board or aluminium base, and the thickness of slab of this backing plate 40 is 2.5mm.
Wherein, phenolic resins backing plate is the class backing plate comparatively commonly used.But because its difference in hardness is comparatively large, the backing plate that hardness is larger, large to the damage of drill bit, thus easily cause drill bit blade to rupture, produce breach, jagged inordinate wear.
Melamine backing plate, main employing Lauxite, and this Lauxite reacts by urea and resin solution the thermosetting resin generated, later stage is cross-linked into insoluble not molten macromolecular substances after HTHP, absorption coerfficient is well below wood fibre, and the relative wood fibre of Lauxite water imbibition after solidification can reduce by more than 80%, like this, when pcb board is holed, the buckling deformation of pcb board can be reduced preferably.
Lamination backing plate, in being used for, the Drilling operation of low-grade PCB, although its processing technology is simple, production cost is lower, recyclable, and its mechanical strength is poor, and poor flatness easily produces burr during boring, and cause chip removal bad, small-bore easily blocks.
Wood fibre backing plate, comprises composite base sheeting caps, gluing sheeting caps, wood-fibred backing plate etc., although its flatness is better, produce burr during boring less, recyclable, its thermal diffusivity is poor, larger to bit wear.
Aluminium base backing plate, is used for the Drilling operation of medium and high classes PCB, although its flatness is better, thermal diffusivity is good, and recyclable, its manufacturing cost is high.
Preferably, the drill bit of described PCB mechanical drilling machine is integral type drill bit.By drill bit is set to one-piece drill bit, borehole accuracy can be ensured preferably, avoid occurring larger beat.
In addition, the deviation range of this case is ± 0.025mm.When pcb board 30 deviate detected is in the scope of ± 0.025mm, then can detection of end, as the scope not at ± 0.025mm, then investigate each step correctness and judge test problems, then again detecting, again to pass judgment on PCB mechanical drilling machine borehole accuracy.
The foregoing is only preferred embodiment of the present invention, its structure is not limited to the above-mentioned shape enumerated, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a detection method for PCB mechanical drilling machine borehole accuracy, is characterized in that, comprises the following steps:
A, get pcb board, cover plate and backing plate ready, and be drilled with respectively the second pin hole, described cover plate be drilled with on the first pin hole and described backing plate on described pcb board and be drilled with the 3rd pin hole, and the aperture of this first pin hole, the second pin hole and the 3rd pin hole is identical;
B, sequentially that described cover plate, described pcb board, described backing plate is superimposed to form a superimposed body, and the center of described first pin hole making described cover plate, described pcb board, described backing plate corresponding, described second pin hole, described 3rd pin hole on the same line, described superimposed body is provided with a pin and makes this pin through described first pin hole, described second pin hole and described 3rd pin hole, then clamp described superimposed body by a clamping device by the described pin of clamping, more described superimposed body is placed on the workbench of PCB mechanical drilling machine;
C, on described PCB mechanical drilling machine, input machined parameters, and make described PCB mechanical drilling machine on described superimposed body, process the boring of assigned address;
D, take off the described superimposed body after boring, and the cover plate of this superimposed body, pcb board and backing plate are split;
E, to remove on described pcb board residue residual in Drilling operation;
F, by image detection device, variance analysis is carried out to the boring on described pcb board;
G, pass judgment on the deviate drawn by described image detection device, if this deviate is in the deviation range of specifying, then end operation; If this deviate is not in the deviation range of specifying, then investigates each step correctness and judge test problems, then repeating step b to step g;
In step c, described PCB mechanical drilling machine is provided with a coordinate system in the surface of described superimposed body, and optionally hole in the X-axis of this coordinate system and one of them axle of Y-axis, then, another axle of this coordinate system is holed, finally, on this coordinate system, hole in other position of removing in X-axis, Y-axis.
2. the detection method of PCB mechanical drilling machine borehole accuracy as claimed in claim 1, it is characterized in that: when described PCB mechanical drilling machine is holed on the coordinate system of described superimposed body, using the initial point of this coordinate system as relative position, according to the bore position of specifying from far near to and fro in X-axis, in Y-axis and except X-axis, Y-axis other position hole.
3. the detection method of PCB mechanical drilling machine borehole accuracy as claimed in claim 1, it is characterized in that: in step c, the drill speed of described PCB mechanical drilling machine is 25-65Krpmin, and feed speed is 1.0-2.6m/min, and withdrawing speed is 12-24m/min.
4. the detection method of PCB mechanical drilling machine borehole accuracy as claimed in claim 1, is characterized in that: in step e, and described pcb board removes residue by air gun or plasma cleaner.
5. the detection method of PCB mechanical drilling machine borehole accuracy as claimed in claim 1, it is characterized in that: in step f, described image detection device is Quadratic Finite Element detector.
6. the detection method of the PCB mechanical drilling machine borehole accuracy as described in any one of claim 1-5, is characterized in that: described pcb board is FR4H/H, and its Tg is 130-150 DEG C, and thickness of slab is 1.0-1.6mm.
7. the detection method of the PCB mechanical drilling machine borehole accuracy as described in any one of claim 1-5, is characterized in that: described cover plate is aluminum foil plate, phenolic aldehyde cardboard or phenol cardboard, and the thickness of slab of this cover plate is 0.13-0.18mm; Described cover plate is attached to the upper surface of described pcb board by U.S. line paper.
8. the detection method of the PCB mechanical drilling machine borehole accuracy as described in any one of claim 1-5, is characterized in that: described backing plate is phenolic resins plate, melamine plate, laminated paper board, wood fibre board or aluminium base, and the thickness of slab of this backing plate is 2.5mm.
9. the detection method of the PCB mechanical drilling machine borehole accuracy as described in any one of claim 1-5, is characterized in that: the drill bit of described PCB mechanical drilling machine is integral type drill bit.
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| JPH07204994A (en) * | 1994-01-20 | 1995-08-08 | Seikosha Co Ltd | Method of detecting mark position and method of drilling workpiece |
| TW247392B (en) * | 1994-03-31 | 1995-05-11 | Seikosya Kk | Drilling process for printed circuit board and its device |
| JP2004188574A (en) * | 2002-12-12 | 2004-07-08 | For-A Co Ltd | Drilling device for printed wiring board |
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| CN101726245A (en) * | 2008-10-15 | 2010-06-09 | 维嘉数控科技（苏州）有限公司 | Method for analyzing borehole deviation of PCB drilling machine |
| CN102581334A (en) * | 2011-01-12 | 2012-07-18 | 昆山万正电路板有限公司 | Boring and detection all-in-one machine for circuit board |
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| CN103029169A (en) * | 2012-12-21 | 2013-04-10 | 深圳市柳鑫实业有限公司 | Novel cover plate for PCB (Printed Circuit Board) drilling and manufacturing method |
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| CN104149125A (en) | 2014-11-19 |
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