CN201124256Y - fine hole drill - Google Patents
fine hole drill Download PDFInfo
- Publication number
- CN201124256Y CN201124256Y CNU2007201946336U CN200720194633U CN201124256Y CN 201124256 Y CN201124256 Y CN 201124256Y CN U2007201946336 U CNU2007201946336 U CN U2007201946336U CN 200720194633 U CN200720194633 U CN 200720194633U CN 201124256 Y CN201124256 Y CN 201124256Y
- Authority
- CN
- China
- Prior art keywords
- drill bit
- bore portion
- shank part
- pore drill
- pore
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 17
- 239000011324 bead Substances 0.000 claims abstract description 16
- 239000011148 porous material Substances 0.000 claims description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 229910000679 solder Inorganic materials 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a fine hole drill bit, it contains a handle portion and a drilling portion, the handle portion by one have intensity, the processing nature good, and the lower material of cost is made, be equipped with a shrinkage pool in one side of handle portion, drilling portion is made by a high rigidity, wear-resisting material, drilling portion with the handle portion between have a welding bead, the welding bead adopt high frequency heating solder silver-soldering to form, after drilling portion and handle portion link fixedly, more can process drilling portion to required size, and welding bead shrinkage pool side also can process to the structure that has the inclination.
Description
Technical field
The utility model relates to a kind of drill bit, refers in particular to a kind of required pore drill bit of accurate industry (as being used for circuit boring) that is used for.
Background technology
Prosperity 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 pore drill bit system that printed circuit board drilling uses and belongs to consumptive material, making this kind pore drill bit usually produces in a large amount of modes, therefore if can simplify the manufacture of pore drill bit, must reduce the manufacturing cost of pore drill bit.
See also shown in Figure 1, structural representation for prior art pore drill bit 20, this pore drill bit 20 comprises a shank part 22 and a bore portion 24, wherein the material of shank part 22 is that stainless steel is made, its diameter of phi 1 is generally 3.2mm, the material of bore portion 24 is that wolfram steel is made, its diameter of phi 2 is 1.42mm before grinding, generally in the majority as for the mode that bore portion 24 combines with shank part 22 in the mode that heat is inserted, it is with shank part 22 heating that so-called heat is inserted, so that the shrinkage pool diameter of shank part 22 front ends becomes big because of heat expansion, again bore portion 24 is inserted wherein, also having partly is to finish in cold slotting mode, that is makes shank part 22 and bore portion 24 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 depth H 1 that bore portion 24 is inserted shank part 22 needs 5mm to 6mm at least, just can make and produce enough pull-out capacities between the two; And because bore portion 24 is inserted in the shank part 22 with brute force, and consider the error of both concentricitys, so can not be directly when inserting with bore portion 24 insertions of the diameter 0.5mm to 1.42mm of final demand, otherwise the situation that bore portion 24 fractures or both decentraction take place easily takes place, the practice on the practice is to combine with shank part 22 with thicker bore portion 24 earlier, and then bore portion 24 is machined to the demand size of 0.5mm to 1.42mm in the mode of attrition process, just because of many processing steps, therefore increased the manufacturing cost of pore drill bit 20.
The more important thing is, aspect material cost, because the price of wolfram steel is considerably beyond stainless price, therefore if can reduce the use amount of wolfram steel, that is shorten the required length of bore portion 24 or use the less bore portion 24 of diameter, must lower the manufacturing cost of pore drill bit 20, because pore drill bit 20 belongs to consumptive material, the angle that stands in a large amount of manufacturings is seen it, and the cost that saves also is very considerable.
Therefore need a kind of pore drill bit of development to solve above-mentioned problem.
The utility model content
The main purpose of the utility model is to provide a kind of pore drill bit, and this pore drill bit is with easier mode manufacturing, and can reduce the use amount of making the required wolfram steel of bore portion, and then saves manufacturing cost.
For reaching above-mentioned purpose, the utility model is a kind of pore drill bit, and it comprises a shank part and a bore portion, shank part system by one have intensity, processability is good and material that cost is lower is made, one of shank part side is provided with a shrinkage pool, and the degree of depth of shrinkage pool is 1mm to 4mm; Bore portion system is made by the material of a high rigidity, abrasion performance, has a welding bead between described bore portion and the described shank part, described welding bead is that the mining height cycle adds hot solder silver soldering and forms, bore portion and shank part link fixing after, more bore portion can be machined to required size.
The utility model major advantage comprises: (a) reduce the use amount of making the required wolfram steel of bore portion; When (b) avoiding shank part to combine with bore portion, meticulous bore portion is the situation of fracture easily; (c) can directly link with thinner bore portion and shank part, after reducing shank part and bore portion combining, follow-up procedure.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is the structural representation of prior art pore drill bit;
Fig. 2 is the exploded view of the pore drill bit of the utility model preferred embodiment;
Fig. 3 is the constitutional diagram of the pore drill bit of the utility model preferred embodiment;
Fig. 4 is the structural representation of the pore drill bit welding bead processing back of the utility model Fig. 3.
The specific embodiment
Please consult Fig. 2 and shown in Figure 3 simultaneously, be respectively the exploded view and the constitutional diagram of the pore drill bit 20 of the utility model preferred embodiment.This pore drill bit 20 comprises a shank part 22 and a bore portion 24, wherein shank part 22 is that to have intensity, processability good and lower-cost material is made by a kind of, as stainless steel, be provided with a shrinkage pool 26 in one of shank part 22 side, bore portion 24 is made by the material of a kind of high rigidity, abrasion performance, as the wolfram steel material, has a welding bead 25 between described bore portion 24 and the described shank part 22, wherein welding bead 25 is to add hot solder in mode high-frequency, mode as silver soldering, after welding bead 25 coolings, shank part 22 is promptly finished fixing with bore portion 24.
In the present embodiment, shrinkage pool 26 depth H 2 of shank part 22 can be 1mm to 4mm, represent bore portion 24 at most only to need 4mm, insert or the needed 5mm to 6mm of cold slotting mode compared with traditional hot, can save the use amount of wolfram steel, and then reduce manufacturing cost.
In addition, the diameter of phi 3 of bore portion 24 is generally 0.5mm to 1.42mm before grinding, because manufacture of the present utility model is unlike the hard mode of inserting of tradition, do not worry the danger of fracture when bore portion 24 combines with shank part 22, therefore can direct bore portion 24 combine with shank part 22 with 0.5mm to 1.42mm size, or to reserve combining with shank part 22 of concentricity amount than thin bore portion 24, in conjunction with after again bore portion 24 is machined to required size, in the present embodiment, system processes in the mode of grinding, therefore adopt the wolfram steel material that approaches final bore portion 24 sizes more, can reduce follow-up complicated attrition process action, and can reduce Material Cost, and then reduce manufacturing cost.
See also shown in Figure 4, process the structural representation of backs for pore drill bit 20 welding beads 25 of the utility model Fig. 3, in the figure, the mode that shank part 22 and bore portion 24 heat with high frequency adds hot solder and finishes after the welding, more welding bead 25 sides can be machined to the structure with gradient, to reduce stress concentration effect.
The main advantage system of the utility model comprises: (a) establish after the shrinkage pool 26 owing to shank part 22 bore portion 24 tie up to shank part 22, link fixing with welding bead 25 again, rather than so that heat is slotting or cold slotting mode is made, therefore shank part 22 desired depth H2 reduce than prior art, reduce the use amount of making bore portion 24 required wolfram steel; (b) because bore portion 24 is not directly to insert shank part 22, in the time of therefore can avoiding bore portion 24 to insert shank part 22, the situation of meticulous bore portion 24 easy fractures; (c) can directly link with thinner bore portion 24 and shank part 22, after reducing shank part 22 and bore portion 24 combining, follow-up procedure, and then reduce pore drill bit 20 manufacturing costs; (d), also can decrease so form the degree of difficulty and the cost of shrinkage pool 26 because the degree of depth of shrinkage pool 26 reduces.
Claims (10)
1. pore drill bit, it is characterized in that: described pore drill bit comprises: shank part, and bore portion, one of wherein said shank part side is provided with a shrinkage pool, has a welding bead between described bore portion and the described shank part.
2. pore drill bit as claimed in claim 1 is characterized in that: the material of described shank part is a stainless steel.
3. pore drill bit as claimed in claim 1 is characterized in that: the material of described bore portion is a wolfram steel.
4. pore drill bit as claimed in claim 1 is characterized in that: the degree of depth of described shrinkage pool is less than 4mm.
5. pore drill bit as claimed in claim 1 is characterized in that: the diameter of described bore portion is less than 1.42mm before grinding.
6. pore drill bit as claimed in claim 1 is characterized in that: described welding bead is made with scolder.
7. a pore drill bit comprises the shank part that stainless steel is made, and reaches the bore portion that wolfram steel is made, and it is characterized in that:
One of described shank part side is provided with a shrinkage pool, and a part of material of described bore portion is to be accommodated in the aforesaid shrinkage pool; And a welding bead is to be set at aforementioned shank part and bore portion boundary part, to produce anchor effect between the two.
8. pore drill bit as claimed in claim 7 is characterized in that: the degree of depth of described shrinkage pool is less than 4mm.
9. pore drill bit as claimed in claim 7 is characterized in that: the diameter of described bore portion is less than 1.42mm before grinding.
10. pore drill bit as claimed in claim 7 is characterized in that: described welding bead is made with scolder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201946336U CN201124256Y (en) | 2007-11-12 | 2007-11-12 | fine hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201946336U CN201124256Y (en) | 2007-11-12 | 2007-11-12 | fine hole drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201124256Y true CN201124256Y (en) | 2008-10-01 |
Family
ID=39997672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201946336U Expired - Fee Related CN201124256Y (en) | 2007-11-12 | 2007-11-12 | fine hole drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201124256Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699390A (en) * | 2012-06-29 | 2012-10-03 | 上海海事大学 | Drilling component used for drilling technique of hard alloy materials |
| CN102699369A (en) * | 2012-06-29 | 2012-10-03 | 上海海事大学 | Embedded groove type clamp spring assembly and method for drilling hard alloy materials by using embedded groove type clamp spring assembly |
| CN102728875A (en) * | 2012-06-29 | 2012-10-17 | 上海海事大学 | Stem body component for use in hard alloy material drilling process |
-
2007
- 2007-11-12 CN CNU2007201946336U patent/CN201124256Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699390A (en) * | 2012-06-29 | 2012-10-03 | 上海海事大学 | Drilling component used for drilling technique of hard alloy materials |
| CN102699369A (en) * | 2012-06-29 | 2012-10-03 | 上海海事大学 | Embedded groove type clamp spring assembly and method for drilling hard alloy materials by using embedded groove type clamp spring assembly |
| CN102728875A (en) * | 2012-06-29 | 2012-10-17 | 上海海事大学 | Stem body component for use in hard alloy material drilling process |
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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: 20081001 Termination date: 20121112 |