CN201227698Y - Microbit for printed circuit boards industry - Google Patents
Microbit for printed circuit boards industry Download PDFInfo
- Publication number
- CN201227698Y CN201227698Y CNU2008200945449U CN200820094544U CN201227698Y CN 201227698 Y CN201227698 Y CN 201227698Y CN U2008200945449 U CNU2008200945449 U CN U2008200945449U CN 200820094544 U CN200820094544 U CN 200820094544U CN 201227698 Y CN201227698 Y CN 201227698Y
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- Prior art keywords
- drillstock
- embedded hole
- microbit
- body member
- printed circuit
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Abstract
The utility model discloses a microbit which is used in the PCB industries. The microbit comprises a drillstock component and a drill body component, wherein, a fitting hole is formed in the axial direction of the end surface of the drillstock component; a weld part which corresponds to the fitting hole is arranged in the axial direction of the drill body component; and the weld part of the drill body component is in welded joint with the drillstock component through the fitting hole. Because the fitting hole is formed in the axial direction of the end surface of the drillstock component and a weld part arranged in the axial direction of the drill body component is inserted the fitting hole and welded, the drill body component can not be pulled out under the condition that the fitting hole is affected by the heat. Furthermore, because the inner wall of a fitting hole performs the fitting, guiding and spacing functions, the drill body component is easy to coaxially fit with drillstock component. Therefore, the microbit processing is more easy, and processing difficulty is lessened, and the processing quality of the microbit is enhanced.
Description
Technical field
The utility model relates to the manufacturing field of printed circuit board (PCB), in particular, relates to a kind of microbit that is used for printed circuit board industry.
Background technology
The drill bit raw material of hard materials such as processing printed circuit board use usually with the carbide alloy material of high-hardness tungsten carbide as main component, the drill bit of this material generally is used for the bore operation of printed circuit board industry, is held in machine tool mechanical and carries out operation on hand.
There is the trend that develops towards small direction in required aperture on the printed circuit board (PCB), so the brill body member external diameter of microbit also needs trickle.Will be clamped on the clamping mechanism of drilling machine owing to microbit simultaneously, so that must there be big external diameter at its drillstock position.
Usually, this carbide drill has following several form.
Prior art 1 (monolithic devices):
As shown in Figure 1, the whole hard alloy bar is processed, back fixed length chamfering is a shank, and front end utilizes cutting machine to process external diameter trickleer cutting edge relatively, and processes transition bench between shank and cutting edge, and then processes microbit 1.
In the prior art 1, because the brill body member of drill bit 1 and drillstock member are processed by a whole hard alloy bar, because the carbide alloy bar costs an arm and a leg, and the alloy price is in the process of continuous rising in the recent period, so there is the high shortcoming of processing cost in this processing method.In addition, boring under the situation that body external diameter and handle footpath size differ greatly, also have the difficult processing of cutting edge, the process-cycle is longer, and bores the shortcoming that directly causes a large amount of carbide alloy smear metal waste etc. because of processing.
Prior art 2 (mosaic type):
As shown in Figure 2, a stainless steel drillstock member 2 (end face axial is formed with embedded hole), a carbide drill body member 3.Wherein the internal diameter outline of this embedded hole is less than boring body member 3 external diameters, and the embedded hole heating with drillstock member 2 during joint makes its expansion, utilizes the physics thrust will bore body member 3 and inserts in this embedded hole.
This method can be saved required hard alloy material to a certain extent, and it is inclined to one side to improve Kong Weiyi, prevents to bore the advantage of body member 3 easy fractures etc.The thrust dynamics deficiency that heating produces but drill bit can occur in process of manufacture causes the pin phenomenon, therefore, that the degree of depth of the embedded hole of drillstock member 2 need be dug usually is very dark, the very long part of carbide drill body member 3 all is inserted in the embedded hole, has still wasted a lot of hard alloy materials.In use drill bit easily produces heat and embedded hole is increased in addition, and then produces the phenomenon of pin.This processing mode is also higher to the required precision of embedded hole inwall, makes the process of embedded hole have difficulty, and is dark embedded hole, so there is certain shortcoming aspect embedded hole quality guarantee and the processing cost.
Prior art 3 (inserting the viscose type):
The drill bit-like that this method is made is similar to the drill bit of mosaic type, only the brill body member of matched in clearance and drillstock member are cohered is integral with cohering glue.Though this drill bit has financial cost low, easy characteristics such as realizations, it also has the shortcoming of self, and for example being heated is drawn out easily, and glue is aging easily, cohere glue during boring processing generation heat melts easily, and processing cost height, difficulty are big, and the axiality difference etc.
Prior art 4 (plane butt welding type):
At present, the plane butt welding often makes in two ways, and a kind of is to wait external diameter butt welding mode, and as shown in Figure 3, a kind of is the little butt welding mode of big weldering, as shown in Figure 4.The butt welding mode drill bit little with big weldering is example, and one section external diameter is an one less than drillstock carbide drill body member 5 and one section stainless steel drillstock member 4 butt welding under the effect of the soft alloy bond of one deck directly.Though soft alloy bond can increase the shock-proof effect of buffering, make drill bit in working angles, effectively reduce vibrations, the weld seam of drill bit joint ruptures easily, and axiality is relatively also relatively poor, and production cost is also higher relatively.
In sum, the microbit that is used for printed circuit board industry of the prior art has a later stage and breaks down second-rate problem easily when using; In addition, also have the processing cost problem of higher.
The utility model content
For overcoming above-mentioned defective, technical problem to be solved in the utility model provides the microbit that a kind of quality is used for printed circuit board industry preferably.
The purpose of this utility model is achieved through the following technical solutions:
A kind of microbit that is used for printed circuit board industry, comprise the drillstock member and bore the body member, wherein, the end face axial of described drillstock member is formed with embedded hole, weld part in the embedded hole put into that is axially arranged with correspondence of described brill body member, the weld part and the drillstock member of described brill body member are welded to connect by embedded hole.
The weld part of described brill body member is for boring the extended part of body member, and the diameter of weld part is identical with the diameter of brill body member bodies, all less than the external diameter of described drillstock member.Such design has reduced the material that bores the required use of body member, makes processing cost reduce.
Described drillstock member is provided with transition bench with the truncated cone-shaped of drillstock component coaxial at an end that is provided with embedded hole, and described embedded hole is arranged on the round platform upper surface of transition bench.
The outside dimension scope of described brill body member is between 1.8mm～3.175mm; The outside dimension scope of described brill body member is between 0.8mm～2.5mm.
The embedded hole degree of depth of the ora terminalis part of described drillstock member is between 0.5mm～3mm.
The solder paste thickness at the end is greater than the solder paste thickness of embedded hole inwall in the described embedded hole.
The edge, junction of described brill body member is provided with chamfering, and simultaneously, the embedded hole inwall of described drillstock member also is provided with corresponding chamfering.Such design makes welding effect better.
The utility model is owing to the end face axial at the drillstock member is provided with embedded hole, welding in the weld part that the is axially arranged with insertion embedded hole of brill body member is fixing, make that boring the body member can not be pulled out yet under the situation that embedded hole is heated, and, because the embedded hole inwall that the end face axial of drillstock member forms plays chimeric guide and limit, bore the body member and can accomplish coaxial chimeric with the drillstock member easily, make the processing of drill bit easier, difficulty of processing reduces, and also can well guarantee the crudy of microbit simultaneously.
Description of drawings
Fig. 1 is the structural representation of the microbit of prior art 1;
Fig. 2 is the structural representation of the microbit of prior art 2;
Fig. 3 is the structural representation of a kind of microbit of prior art 4;
Fig. 4 is the structural representation of the another kind of microbit of prior art 4;
Fig. 5 is that the utility model specific embodiment scribbles soldering paste and structural representation when not welding;
Fig. 6～Fig. 9 is the structural representation of four kinds of microbits in the utility model specific embodiment;
Figure 10 is the structural representation of processing required isolated plant during microbit in the utility model specific embodiment.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
As Fig. 5～shown in Figure 9, a kind of microbit that is used for printed circuit board industry described in the utility model, comprise and adopt stainless steel cylinder bar drillstock member of making 7 and the brill body member 6 that adopts the carbide alloy bar to make, the end face axial of drillstock member is formed with embedded hole, bore the interior weld part of the embedded hole put into that is axially arranged with correspondence of body member, make the weld part of brill body member and the embedded hole of drillstock member use soldering paste to be welded to connect.Wherein, the thickness of the soldering paste at the interior end of embedded hole is greater than the thickness of the soldering paste of the inwall of embedded hole, make that the bottom of embedded hole of drillstock member is main solder bond place, and the inner wall section of embedded hole plays auxiliary welding.The degree of depth of the embedded hole of the ora terminalis part of drillstock member is between 0.5mm～3mm, as selecting 1.0mm, 1.5mm, 2.0mm, 2.5mm etc.This shows that the degree of depth of the embedded hole of the technical program is smaller, therefore, the material that brill body member is entrenched in the embedded hole also is considerably less, has reduced processing cost.The weld part of described brill body member is for boring the extended part of body member, and the diameter of weld part is identical with the diameter of brill body member bodies, all less than the external diameter of described drillstock member.Usually, the outside dimension scope of described drillstock member between 1.8mm～3.175mm, as, can select 2.0mm, 3.175mm etc.And the outside dimension scope of boring the body member is between 0.8mm～2.5mm, as, can select 1.0mm, 1.5mm, 2.0mm etc.Wherein, the edge, junction that bores the body member is provided with chamfering, and simultaneously, the embedded hole inwall of described drillstock member also is provided with corresponding chamfering.
Wherein, boring body member 10 external diameters will be much smaller than drillstock member 12 external diameters the time, do not influencing under the embedded hole processing situation, the drillstock member is provided with truncated cone-shaped transition bench with the respective angles scope inclination angle of drillstock component coaxial at an end that is provided with embedded hole, fall drillstock member 12 and the external diameter drop that bores body member 10 progressively to delay, make tiny brill body member 10 obtain certain support strength.Described embedded hole is arranged on the round platform upper surface of transition bench.Wherein, the domatic tapering angle of the tapering of described transition bench can be according to the actual conditions specific design, the greatest limit angle of its inclination angle scope can be from zero degree (as shown in Figure 7) to actual conditions, the inclination angle angle that is become when promptly the transition bench bus connects drillstock member end face embedded hole edge.
Required isolated plant comprises when as shown in figure 10, processing microbit in the present embodiment:
Bore body anchor clamps 9, be used for clamping and bore body member 10, and will bore in the embedded hole that body member 10 is fed to drillstock member 12 by its feed arrangement;
Drillstock member 12 is the made elongated cylinder bar of a predetermined metal material, and the external diameter of this drillstock member is bigger than carbide drill body member external diameter, has predetermined outside dimension, and can form the transition bench of pouring out corresponding inclination angle at the drillstock component ends;
Soldering paste press-in device 15 cooperates with mechanical clamp 16, is used for soldering paste is applied in the embedded hole of drillstock member 12;
Radio-frequency induction coil 13 is arranged on the embedded hole annex of drillstock member 12, is used for adstante febre the soldering paste in the embedded hole of drillstock member 12 is heated;
A kind of method of using above-mentioned isolated plant to process above-mentioned microbit may further comprise the steps:
A: mechanical clamp 16 is pushed into the place, location with 12 clampings of drillstock member, starting soldering paste press-in device 15 is applied to soldering paste in the embedded hole of drillstock member 12, bore body member 10 and clamp, make itself and drillstock member 12 possess concentricity requirement, and position by jacking block 8 by boring body anchor clamps 9;
B: the feed arrangement that utilize to bore body anchor clamps 9 will bore in the embedded hole that body member 10 is fed to drillstock member 12;
C: will bore body member 10 be advanced to certain apart from the time, make radio-frequency induction coil 13 heatings that are contained in drillstock member 12 places by Current Control, impel solder paste melts, welding manner with high-frequency induction heating melts the soldering paste in the embedded hole that bores the body member, and drillstock member and brill body member are welded into the one bar;
D: after welding was finished, 11 pairs of inserted type welding of open detection device microbit carried out detections such as linear measure longimetry, strength test; After finishing detection,, produce qualified inserted type welding microbit boring operation processing such as slot on the body member.
In the described steps A, in the time of in starting the embedded hole that soldering paste press-in device 15 is applied to soldering paste drillstock member 12, can adopt injection apparatus soldering paste to be welded in the embedded hole of drillstock member, make the interior end and the inwall of the embedded hole of drillstock member all cover soldering paste, wherein, the solder paste thickness that primary coat is covered in the described embedded hole is greater than the solder paste thickness of the inwall coating of embedded hole.Such design makes the embedded hole bottom of drillstock member be main solder bond place, and the inner wall section of embedded hole plays auxiliary welding.
Described carbide drill body member 10 can be selected other hard alloy metal material accordingly because of the requirement of operating environment for use, is implemented such as carbide alloy materials such as titanium carbide or tungsten carbides.So also be improved in the life-span of the drill bit that processes, position, hole, the hole that processes is thick etc. is also improved accordingly.
In addition, because the application of this microbit is a circuit-board industry, the external diameter that bores body member 10 usually will be much smaller than the external diameter of drillstock member 12 (in industry standard, the external diameter standard of this drillstock member is 3.175mm), carbide drill body member 10 with respect to costliness, proportion is bigger on the whole in drill bit for drillstock member 12, and its mainly to act on be that clamping location is used, so its material of selecting for use gets final product for the stainless steel cylinder bar of cheapness.
And, boring body member external diameter will be much smaller than drillstock member external diameter the time, it is domatic that the drillstock member has the end edge portion branch of embedded hole to leave tapering, makes the slow transition bench that falls the external diameter drop progressively, so that make tiny brill body member obtain certain support strength.
In addition, can adopt between bigger brill body member of fusing point gap and drillstock member that the effect of solder flux and scaling powder is melted is soldering paste all over the body, it is applied in the embedded hole of drillstock member, brill body member and drillstock member are welded together rapidly, improve the butt joint implementation through operation procedures such as flash processing again.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (7)
1, a kind of microbit that is used for printed circuit board industry, comprise the drillstock member and bore the body member, it is characterized in that, the end face axial of described drillstock member is formed with embedded hole, weld part in the embedded hole put into that is axially arranged with correspondence of described brill body member, the weld part and the drillstock member of described brill body member are welded to connect by embedded hole.
2, a kind of microbit that is used for printed circuit board industry as claimed in claim 1, it is characterized in that, the weld part of described brill body member is for boring the extended part of body member, and the diameter of weld part is identical with the diameter of brill body member bodies, all less than the external diameter of described drillstock member.
3, a kind of microbit that is used for printed circuit board industry as claimed in claim 2, it is characterized in that, described drillstock member is provided with transition bench with the truncated cone-shaped of drillstock component coaxial at an end that is provided with embedded hole, and described embedded hole is arranged on the round platform upper surface of transition bench.
4, as the arbitrary described a kind of microbit that is used for printed circuit board industry of claim 1～3, it is characterized in that the outside dimension scope of described brill body member is between 1.8mm～3.175mm; The outside dimension scope of described brill body member is between 0.8mm～2.5mm.
As the arbitrary described a kind of microbit that is used for printed circuit board industry of claim 1～3, it is characterized in that 5, the degree of depth of the embedded hole of the ora terminalis part of described drillstock member is between 0.5mm～3mm.
As the arbitrary described a kind of microbit that is used for printed circuit board industry of claim 1～3, it is characterized in that 6, the solder paste thickness at the end is greater than the solder paste thickness of embedded hole inwall in the described embedded hole.
7, as the arbitrary described a kind of microbit that is used for printed circuit board industry of claim 1～3, it is characterized in that the edge, junction of described brill body member is provided with chamfering, simultaneously, the embedded hole inwall of described drillstock member also is provided with corresponding chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200945449U CN201227698Y (en) | 2008-06-06 | 2008-06-06 | Microbit for printed circuit boards industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200945449U CN201227698Y (en) | 2008-06-06 | 2008-06-06 | Microbit for printed circuit boards industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201227698Y true CN201227698Y (en) | 2009-04-29 |
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ID=40632660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200945449U Expired - Fee Related CN201227698Y (en) | 2008-06-06 | 2008-06-06 | Microbit for printed circuit boards industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201227698Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049553A (en) * | 2010-12-01 | 2011-05-11 | 湖北齐能精密工业有限公司 | Cutter special for interference compact concentric splicing circuit board and manufacturing method thereof |
| CN102152090A (en) * | 2011-03-11 | 2011-08-17 | 新野鼎泰电子精工科技有限公司 | PCB (printed circuit board) micro-drill bit cold-inserting technique |
-
2008
- 2008-06-06 CN CNU2008200945449U patent/CN201227698Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049553A (en) * | 2010-12-01 | 2011-05-11 | 湖北齐能精密工业有限公司 | Cutter special for interference compact concentric splicing circuit board and manufacturing method thereof |
| CN102152090A (en) * | 2011-03-11 | 2011-08-17 | 新野鼎泰电子精工科技有限公司 | PCB (printed circuit board) micro-drill bit cold-inserting technique |
| CN102152090B (en) * | 2011-03-11 | 2012-08-01 | 新野鼎泰电子精工科技有限公司 | PCB (printed circuit board) micro-drill bit cold-inserting technique |
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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: 20090429 Termination date: 20150606 |
|
| EXPY | Termination of patent right or utility model |