CN201543871U - Composite microbit - Google Patents
Composite microbit Download PDFInfo
- Publication number
- CN201543871U CN201543871U CN2009202447955U CN200920244795U CN201543871U CN 201543871 U CN201543871 U CN 201543871U CN 2009202447955 U CN2009202447955 U CN 2009202447955U CN 200920244795 U CN200920244795 U CN 200920244795U CN 201543871 U CN201543871 U CN 201543871U
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- CN
- China
- Prior art keywords
- powder metallurgy
- spare
- drillstock
- embedded
- microbit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a composite microbit, which comprises a powdered metallurgical drillstock component and a powdered metallurgical bit body component, wherein, an embedded hole with an opening is axially formed at one end of the powdered metallurgical drillstock component; an embedded part is axially arranged at the periphery of the embedded hole; a cutting edge and a slugslot are formed at the periphery of the powdered metallurgical drill body component, so as to connect a drilltip at one end; an embedded rod axially extends from the other end of the powdered metallurgical drill body component; an embedded part is axially arranged at the periphery of the embedded rod, so as to be correspondingly matched with the embedded hole and the embedded part of the powdered metallurgical drillstock component; the embedded rod of the powdered metallurgical drill body component is axially inserted and consolidated in the embedded hole of the powdered metallurgical drillstock component; and the embedded parts of the powdered metallurgical drillstock component and the powdered metallurgical drill body component are radially consolidated in a clamping manner, so that the twisting resistance of embedded structures can be enhanced, the clamping force for consolidating is improved, the micro-drill is more suitable for the automated manufacturing and process, and the manufacturing cost is reduced.
Description
Technical field
The utility model relates to a kind of drill bit, particularly relates to a kind of required combined type microbit of accurate industry (as being used for circuit boring) that is used for.
Background technology
Development along with electronic industry, making rapid progress of electronic product, printed circuit board (PCB) (Printed Circuit Board now, PCB) size is more and more littler, relative, operated implement required in the manufacturing process is also more and more accurate, it is more tiny than general drill bit wherein to be used for the drill bit that printed circuit board drilling uses, and this is used for the microbit that printed circuit board drilling uses and belongs to consumptive material, make this kind microbit usually with batch mode production, therefore if can simplify the manufacture of microbit, one reduces the manufacturing cost of microbit surely.
Known microbit comprises a shank part and a drill body part, wherein the material of shank part is that stainless steel is made, its diameter is generally 3.2mm, the material of drill body part is that wolfram steel is made, its diameter is 1.42mm before grinding, and generally in the majority in the mode that heat is inserted as for the mode that drill body part combines with shank part, it is that shank part is heated that so-called heat is inserted, so that the shrinkage pool diameter of shank part front end becomes greatly because of heat expansion, the nose bar with drill body part inserts wherein again.In addition, also having partly is to finish in cold slotting mode, that is makes shank part and drill body part be compelled to pressing at normal temperatures to reach the purpose that combines with the principle of interference engagement.Yet no matter be that heat is inserted or cold slotting mode, the degree of depth that drill body part inserts shank part needs 5mm to 6mm at least, just can make and produce enough pull-out capacities between the two.
But the shank part of this microbit and drill body part must via metalworking machinery respectively cutting and grinding make shrinkage pool and relative nose bar so that labor intensive and time, increase manufacturing cost.Especially it is fixed that the nose bar of the shrinkage pool of shank part and drill body part is made as general circular cross-section sleeve each other, but not radially blocking effect of the circular docking mode of this kind, cause the shank part combination drill body part of microbit can't more promote twisting resistance, and have influence on whole consolidated combination chucking power relatively.Therefore to how to improve the problems referred to above and defective, be the direction of relevant research and development that the dealer desires most ardently.
The utility model content
Main purpose of the present utility model and effect are, the chimeric bar that makes powder metallurgy bore body spare is axially planted and is consolidated in the embedded hole of powder metallurgy drillstock spare, and each other fitting portion to constitute radially blocking fixed, can promote the embedded structure twisting resistance, and improve fixed chucking power, be more suitable for automated manufacturing processing, reduce production costs.
For reaching above-mentioned purpose, the utility model combined type microbit comprises: a powder metallurgy drillstock spare, one end axially are provided with an embedded hole that contains opening, are axially arranged with fitting portion in the embedded hole periphery; One powder metallurgy bores body spare, its outer peripheral edges are provided with cutting blade and flute, and to connect the apex point of an end, the other end that bores body spare in powder metallurgy extends axially a chimeric bar, be axially arranged with fitting portion in chimeric bar periphery, with the embedded hole and the fitting portion thereof of corresponding matching powder metallurgy drillstock spare; The chimeric bar that bores body spare by powder metallurgy is axially planted and is consolidated in the embedded hole of powder metallurgy drillstock spare, and each other fitting portion to constitute radially blocking fixed.
In a preferred embodiment, the chimeric bar that the embedded hole of this powder metallurgy drillstock spare and powder metallurgy bore body spare is made as the cerioid of corresponding matching, its each other with each angle end as fitting portion.
In a preferred embodiment, the chimeric bar that the embedded hole of this powder metallurgy drillstock spare and powder metallurgy bore body spare is made as the round shape or the non-round shape of corresponding matching, its each other periphery be axially arranged with the fitting portion of a plurality of concavo-convex relatively cooperations.
Description of drawings
Fig. 1 is the utility model preferred embodiment microbit stereogram;
Fig. 2 is Fig. 1 microbit cutaway view;
Fig. 3 is the chimeric position of a Fig. 2 microbit amplification view;
Fig. 4 is the chimeric position of a Fig. 3 microbit sectional view;
Fig. 5 is Fig. 3 microbit exploded view;
Fig. 6 is another chimeric position of embodiment microbit amplification view of the utility model;
Fig. 7 is the chimeric position of a Fig. 6 microbit sectional view;
Fig. 8 is Fig. 6 microbit exploded view;
Fig. 9 is the chimeric position of the another embodiment microbit of a utility model sectional view;
Figure 10 is Fig. 9 microbit exploded view.
The main element symbol description
1 microbit, 11 fitting portions
2 powder metallurgy drillstock spares, 12 embedded holes
3 embedded holes, 13 fitting portions
4 openings, 14 chimeric bars
5 fitting portions, 15 fitting portions
6 powder metallurgy bore body spare 16 embedded holes
7 cutting blades, 17 fitting portions
8 flutes, 18 chimeric bars
9 apex points, 19 fitting portions
10 chimeric bars
The specific embodiment
Relevant the utility model is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof now enumerate possible embodiments, and conjunction with figs. are described as follows:
At first, see also Fig. 1 and Fig. 2, the utility model combined type microbit 1 is applicable on the circuit board holes, to make the conductive through hole of connecting circuit inner cord circuit.As shown in FIG., the utility model microbit 1 mainly bores body spare 6 with the fixed tungsten carbide metal class powder metallurgy of a stainless steel metal class powder metallurgy drillstock spare 2 interlockings, to save tungsten carbide metal material use amount.
In the preferred embodiment shown in Fig. 1 to 5, the utility model combined type microbit 1 is specialized in drilling machine and is used, as shown in FIG., powder metallurgy drillstock spare 2 one ends of microbit 1 axially are provided with an embedded hole 3 that contains opening 4, are axially arranged with fitting portion 5 in embedded hole 3 peripheries.And powder metallurgy brill body spare 6 outer peripheral edges are provided with cutting blade 7 and flute 8, with the apex point 9 that connects an end; The other end that bores body spare 6 in powder metallurgy extends axially a chimeric bar 10, is axially arranged with fitting portion 11 in chimeric bar 10 peripheries, with the embedded hole 3 and the fitting portion 5 thereof of corresponding matching powder metallurgy drillstock spare 2.
The powder metallurgy drillstock spare 2 of the utility model microbit 1 bores body spare 6 with powder metallurgy must make earlier moulding separately, insert docking mode by heat again, chimeric bar 10 axial plants of powder metallurgy being bored body spare 6 are consolidated in the embedded hole 3 of powder metallurgy drillstock spare 2, and it is fixed to make each other fitting portion 5,11 constitute radially blocking, can promote the embedded structure twisting resistance, and improve fixed chucking power, be more suitable for automated manufacturing processing, reduce production costs.
Go on to say the combining structure of the utility model combined type microbit 1, shown in Fig. 1 to 5, the chimeric bar 10 that the embedded hole 3 of powder metallurgy drillstock spare 2 and powder metallurgy are bored body spare 6 is made as the cerioid of corresponding matching, above polygonals in three angles for example, its each other can each angle end as fitting portion 5,11, can reach radially blocking consolidation.
In another preferred embodiment shown in Fig. 6,7 and 8, the chimeric bar 14 that the utility model microbit 1 bores body spare 6 with the embedded hole 12 of powder metallurgy drillstock spare 2 and powder metallurgy is made as the round shape of corresponding matching, its each other periphery then be axially arranged with the fitting portion 13,15 of a plurality of concavo-convex relatively cooperations, so that radially blocking is fixed really.In addition, also can design by the microbit 1 shown in Fig. 9 and 10, the embedded hole 16 of powder metallurgy drillstock spare 2 is made as the non-round shape that corresponds to each other and cooperates with the chimeric bar 18 that powder metallurgy bores body spare 6, and directly locatees as blocking usefulness fitting portion 17,19 radially with its relative side.
The utility model combined type microbit 1 is consolidated in chimeric bar 10 axial plants that powder metallurgy bores body spare 6 in the embedded hole 3 of powder metallurgy drillstock spare 2, and it is fixed to make each other fitting portion 5,11 constitute radially blocking, can promote the embedded structure twisting resistance, and improve fixed chucking power, be more suitable for automated manufacturing processing, reduce production costs.
Above illustrated embodiment is only used the utility model for convenience of description, and is not in a limitative way, and is not breaking away from the utility model spirit category, and various simple and easy variation and modification that the those skilled in the art can do all must be contained in the scope of claims.
Claims (4)
1. combined type microbit is characterized in that it comprises: a powder metallurgy drillstock spare, one end axially are provided with an embedded hole that contains opening, are axially arranged with fitting portion in the embedded hole periphery; One powder metallurgy bores body spare, its outer peripheral edges are provided with cutting blade and flute, and to connect the apex point of an end, the other end that bores body spare in powder metallurgy extends axially a chimeric bar, be axially arranged with fitting portion in chimeric bar periphery, with the embedded hole and the fitting portion thereof of corresponding matching powder metallurgy drillstock spare; The chimeric bar that bores body spare by powder metallurgy is axially planted and is consolidated in the embedded hole of powder metallurgy drillstock spare, and each other fitting portion to constitute radially blocking fixed.
2. according to the described combined type microbit of claim 1, it is characterized in that the chimeric bar that the embedded hole of this powder metallurgy drillstock spare and powder metallurgy bore body spare is made as the cerioid of corresponding matching, its each other with each angle end as fitting portion.
3. according to the described combined type microbit of claim 1, it is characterized in that the chimeric bar that the embedded hole of this powder metallurgy drillstock spare and powder metallurgy bore body spare is made as the round shape of corresponding matching, its each other periphery be axially arranged with the fitting portion of a plurality of concavo-convex relatively cooperations.
4. according to the described combined type microbit of claim 1, it is characterized in that the embedded hole of this powder metallurgy drillstock spare is made as the non-round shape that corresponds to each other and cooperate with the chimeric bar that powder metallurgy bores body spare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202447955U CN201543871U (en) | 2009-11-06 | 2009-11-06 | Composite microbit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202447955U CN201543871U (en) | 2009-11-06 | 2009-11-06 | Composite microbit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201543871U true CN201543871U (en) | 2010-08-11 |
Family
ID=42599030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202447955U Expired - Fee Related CN201543871U (en) | 2009-11-06 | 2009-11-06 | Composite microbit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201543871U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106735458A (en) * | 2017-03-29 | 2017-05-31 | 丹阳市博瑞工具有限公司 | A kind of Novel hexagonal handle drill |
| CN111975046A (en) * | 2019-05-24 | 2020-11-24 | 江苏叁陆零工具有限公司 | Composite structure of micro drill bit |
-
2009
- 2009-11-06 CN CN2009202447955U patent/CN201543871U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106735458A (en) * | 2017-03-29 | 2017-05-31 | 丹阳市博瑞工具有限公司 | A kind of Novel hexagonal handle drill |
| CN111975046A (en) * | 2019-05-24 | 2020-11-24 | 江苏叁陆零工具有限公司 | Composite structure of micro drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20121106 |