CN202271009U - Micro drill bit - Google Patents
Micro drill bit Download PDFInfo
- Publication number
- CN202271009U CN202271009U CN 201120353310 CN201120353310U CN202271009U CN 202271009 U CN202271009 U CN 202271009U CN 201120353310 CN201120353310 CN 201120353310 CN 201120353310 U CN201120353310 U CN 201120353310U CN 202271009 U CN202271009 U CN 202271009U
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- cutting edge
- knife face
- main cutting
- chip area
- main
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Abstract
The utility model discloses a micro drill bit which comprises a drill body and an edge part, wherein the edge part comprises a pair of main cutting edges and main scrap discharge grooves, wherein the main scrap discharge grooves are corresponding to the main cutting edges and are spirally distributed in the drill body; a pair of inner scrap discharge grooves are arranged in the contact position between rear knife surfaces of the main cutting edges; an inner cutting edge is formed between the inner scrap discharge groove and the adjacent rear knife surface; and the inner scrap discharge grooves are communicated with the main scrap discharge grooves corresponding to the main cutting edges and respectively form a pair of drill tips in the highest positions in contact with the rear knife surfaces. The utility model has the benefit effect that the service life of the drill bit and the positioning performance of the drill bit in the workpiece processing process are improved.
Description
Technical field
The utility model relates to the drill bit field, particularly relates to a kind of microbit.
Background technology
The PCB circuit board need utilize microbit to punch in process, and along with the trend of miniaturization of electronic products, the board area of said function is in progressively reduction, and the aperture of processing is also dwindling, and this has higher requirement to processing technology.The blade of the microbit that prior art adopts comprises main cutting edge, knife face, chisel edge, and drill bit PCB glass fabric in drilling process intersects rugged surface in length and breadth to be made apex point suffer the impact of cross force and cause that boring position, hole precision reduces, the hole is slightly bad; In addition, can find out that drill bit mainly relies on main cutting edge to carry out workpiece processing from the force analysis of Fig. 1; Chisel edge is not participated in cutting, relies on the mode of extruding scraping to tear workpiece fully, and this extrusion friction power is big; The chisel edge serious wear has shortened service life of drill bit, and the chip that the chisel edge scraping is come out is difficult for discharging; The chip that retains is the wearing and tearing chisel edge further, and the service life of drill bit is shorter.
Summary of the invention
The utility model technical problem to be solved provides a kind of microbit that can in process, improve positioning performance and PCB boring flatness, reduce the blade wearing and tearing.
The purpose of the utility model realizes through following technical scheme:
A kind of microbit comprises and bores body and blade that described blade comprises a pair of main cutting edge, and the spiral corresponding with main cutting edge is distributed in brill main chip area on one's body; The position contacting place is provided with chip area in a pair between the back knife face of described a pair of main cutting edge, forms interior cutting edge between chip area and the adjacent back knife face in described; The main chip area that chip area is corresponding with main cutting edge in described is communicated with; Chip area forms a pair of apex point with the highest position that the back knife face contacts respectively in described one pair.
Preferably, described each main cutting edge respectively correspondence be provided with major first flank and second the back knife face; The major first flank of said each main cutting edge and the second back knife face are intersected in the position of departing from the drill bit axle center, described in chip area be formed at the position that intersects of knife face, second back of two main cutting edges.The knife face that each main cutting edge is corresponding divides the major first flank and the second back knife face, and major first flank can be selected less slope for use like this, and with the support strength of enhancing cutting edge, and the second back knife face is selected big slope for use, increases the chip removal ability of drill bit.With the staggered design of the second back knife face mutual translation of two main cutting edges, it is farther that the live part of the interior cutting edge that chip area and back knife face form in making departs from the axle center of drill bit, and cutting effect is better.
Preferably, chip areas are S-shaped with the adjacent formed intersection of back knife face in said two, the described two interior chip areas formation groove that crosses each other, and its axis is on same straight line; Afterwards the intersection of knife face is crossing for chip areas and corresponding major first flank and second in said two, forms two said apex points.The intersection that the chip area and the second back knife face intersect in the present technique scheme forms interior cutting edge, and the interior cutting edge of S shape has better cutting effect.
Preferably, said two interior chip areas and the adjacent formed intersection of back knife face intersect V-shaped, and the axis of two interior chip areas is parallel to each other.The embodiment of cutting edge in the utility model is a kind of in addition.
Preferably, second of chip area and corresponding main cutting edge afterwards knife face is tangent in described.So not only chip removal better effects if of design, its tangent curved surface can directly be processed by the curved surface of emery wheel section and once form, the processing of being more convenient for.
Preferably, said interior chip area and adjacent said major first flank intersect, and form chisel edge, and the total length scope of said chisel edge is between 0.1%～35% bit diameter of bit diameter.Keep chisel edge, strengthen the intensity of apex point, at the serviceability and the anti-wear performance of this number range inner equilibrium drill bit, effect is better.
Preferably, knife face after said each main cutting edge correspondence is provided with, said interior chip area and corresponding main cutting edge intersection form two said apex points.The present technique scheme can fully phase out chisel edge, the wear problem of having avoided the chisel edge scraping to produce, and also the apex point that forms is more sharp-pointed, tears surface of the work more easily, also realizes the location of apex point more easily.
The utility model is owing to position contacting place between the back knife face of main cutting edge is provided with chip area in a pair, and on the one hand, the chip in the blade process can import main chip area through interior chip area, strengthens the chip removal performance, reduces the blade wearing and tearing; On the other hand, originally formed interior chip area in the position that should form chisel edge, interior chip area forms interior cutting edge with the intersection of back knife face, can directly cut workpiece.So just the extruding scraping thaumatropy with chisel edge is the cutting structure of interior cutting edge, has further reduced the wearing and tearing of blade, effectively improves the service life of drill bit; In addition; The utility model can form two apex points, and when tearing workpiece, two apex points and two chisel edge cutting edges go into to bore simultaneously; When trend appears skidding in an apex point and a chisel edge cutting edge; Another apex point can provide certain support with another chisel edge cutting edge, stops this apex point to slide, and therefore can improve the positioning performance of drill bit in the time of processing work.In sum, two apex points go into to bore, and can significantly reduce the pcb board glass fabric and intersect rugged surface in length and breadth and make apex point suffer the impact of cross force, and the possibility of skidding when reducing into brill has improved positioning performance; Positioning performance has promoted, and drill bit is shaken in boring procedure and obviously reduced, and can obtain the higher boring of flatness.Interior chip area forms interior cutting edge, has the function that promptly begins to cut off the pcb board glass fabric into brill, can significantly reduce wearing and tearing, improves the service life of drill bit.
Description of drawings
Fig. 1 is the stressed sketch map of prior art drill bit;
Fig. 2 is the utility model embodiment one drill bit schematic perspective view;
Fig. 3 is the utility model embodiment one drill bit schematic side view;
Fig. 4 is the utility model embodiment one drill bit schematic top plan view;
Fig. 5 is the stressed sketch map in the utility model embodiment one drill bit movement process;
Fig. 6 is the utility model embodiment two drill bit schematic perspective views;
Fig. 7 is the utility model embodiment two drill bit schematic side view;
Fig. 8 is the utility model embodiment two drill bit schematic top plan view;
Fig. 9 is the stressed sketch map in the utility model embodiment two drill bit movement processes;
Figure 10 is the utility model embodiment three drill bit schematic side view;
Figure 11 is the utility model embodiment three drill bit schematic top plan view;
Wherein: 1, main chip area; 2, main cutting edge; 3, back knife face; 31, major first flank; 32, the second back knife face; 4, interior chip area; 41, interior cutting edge; 42, apex point; 43, chisel edge.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is described further.
A kind of microbit comprises and bores body and blade that described blade comprises a pair of main cutting edge 2, and is distributed in brill main chip area 1 on one's body with main cutting edge 2 corresponding spirals; The position contacting place is provided with chip area 4 in a pair between the back knife face 3 of described a pair of main cutting edge 2, forms interior cutting edge 41 between chip area 4 and the adjacent back knife face 3 in described; Chip area 4 is communicated with main cutting edge 2 corresponding main chip areas 1 in described; Chip area 4 forms a pair of apex point 42 with the highest position that back knife face 3 contacts respectively in described one pair.Further explain the utility model design below in conjunction with the specific embodiment:
Embodiment one: shown in Fig. 2～5,
Each main cutting edge 2 correspondence respectively is provided with the major first flank 31 and the second back knife face 32; The major first flank 31 of said each main cutting edge 2 and the second back knife face 32 are intersected in the position of departing from the drill bit axle center, described in chip area 4 be formed at the position that intersects of knife face 32, second back of two main cutting edges 2.Chip areas 4 are S-shaped with adjacent back knife face 3 formed intersections in said two, the chip areas 4 formation groove that crosses each other in described two, and its axis is on same straight line; Afterwards the intersection of knife face 32 is crossing for chip areas 4 and corresponding major first flank 31 and second in said two, forms two apex points 42.Chip area 4 intersects with adjacent said major first flank 31 in said, forms chisel edge 43.
Further, the total length scope of said chisel edge 43 is between 0.1%～35% bit diameter of bit diameter.At the serviceability and the anti-wear performance of this number range inner equilibrium drill bit, effect is better.
Further, second of chip area 4 and corresponding main cutting edge 2 afterwards knife face 32 is tangent in described.So not only chip removal better effects if of design also is more convenient for using emery wheel processing.
Each main cutting edge 2 corresponding knife face divides the major first flank 31 and the second back knife face 32, and major first flank 31 can be selected less slope for use like this, and with the support strength of enhancing cutting edge, and the second back knife face 32 is selected big slope for use, increases the chip removal ability of drill bit.With the staggered design of the second back knife face 32 mutual translations of two main cutting edges 2, it is farther that the live part of chip area 4 and the interior cutting edge 41 of back knife face 3 formation departs from the axle center of drill bit in making, cutting effect is better.And the intersection that the interior chip area 4 and the second back knife face 32 intersect forms interior cutting edge 41, and the interior cutting edge 41 of S shape has better cutting effect.Because apex point 42 not on main cutting edge 2, has therefore also kept chisel edge 43 between apex point 42 and main cutting edge 2, help strengthening the intensity of apex point 42, in process, is difficult for causing apex point 42 to burst apart.
Embodiment two: shown in Fig. 6～9,
Each main cutting edge 2 correspondence respectively is provided with the major first flank 31 and the second back knife face 32; The major first flank 31 of said each main cutting edge 2 and the second back knife face 32 are intersected in the position of departing from the drill bit axle center, described in chip area 4 be formed at the position that intersects of knife face 32, second back of two main cutting edges 2.Chip area 4 is crossing S-shaped with adjacent back knife face 3 formed intersections in said two, and the axis of two interior chip areas 4 is parallel to each other, and said interior chip area 4 intersects formation chisel edge 43 with adjacent said major first flank 31.
Further, the total length scope of said chisel edge 43 is between 0.1%～35% bit diameter of bit diameter.Keep chisel edge 43, strengthen the intensity of apex point 42, at the serviceability and the anti-wear performance of this number range inner equilibrium drill bit, effect is better.
Further, second of chip area 4 and corresponding main cutting edge 2 afterwards knife face 32 is tangent in described.So not only chip removal better effects if of design also is more convenient for using emery wheel processing.
Present embodiment provides the embodiment of the interior cutting edge 41 of other a kind of each main cutting edge 2 corresponding two back knife face 3.Each main cutting edge 2 corresponding knife face divides the major first flank 31 and the second back knife face 32, and major first flank 31 can be selected less slope for use like this, and with the support strength of enhancing cutting edge, and the second back knife face 32 is selected big slope for use, increases the chip removal ability of drill bit.With the staggered design of the second back knife face 32 mutual translations of two main cutting edges 2, it is farther that the live part of chip area 4 and the interior cutting edge 41 of back knife face 3 formation departs from the axle center of drill bit in making, cutting effect is better.Because apex point 42 not on main cutting edge 2, has therefore also kept chisel edge 43 between apex point 42 and main cutting edge 2, help strengthening the intensity of apex point 42, in process, is difficult for causing apex point 42 to burst apart.
Embodiment three: shown in Figure 10～11,
Knife face 3 after said each main cutting edge 2 correspondence are provided with one, said interior chip area 4 and corresponding main cutting edge 2 intersections form two said apex points 42.The present technique scheme can fully phase out chisel edge 43, the wear problem of having avoided chisel edge 43 scrapings to produce, and also the apex point that forms is more sharp-pointed, tears surface of the work more easily, also realizes the location of apex point 42 more easily.
Below introduce a kind of method of making above-mentioned microbit, may further comprise the steps:
A: on bar, process main chip area 1;
B: the blade of polishing drill bit processes two interior chip areas 4 that are communicated with main chip area 1 respectively at two main cutting edges, 2 corresponding back knife face 3 contact positions.
Further, said step B also comprises:
B1: the blade of polishing drill bit, corresponding each main cutting edge 2 process the major first flank 31 and the second back knife face 32, said major first flank 31 and with said second after knife face 32 be intersected in the position of departing from the drill bit axle center;
B2: the position that intersects at two second back knife faces 32 polish two interior chip areas 4 that are communicated with main chip area 1 respectively.
This has the manufacturing approach of the interior chip area 4 of two back knife faces 3 for each main cutting edge 2.
Further, second of chip area 4 and corresponding main cutting edge 2 afterwards knife face 32 is tangent in described.
The interior chip area 4 and the second back knife face 32 are tangent, can realize seamlessly transitting the chip removal better effects if with main chip area 1.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.
Claims (7)
1. a microbit comprises and bores body and blade, and described blade comprises a pair of main cutting edge, and the spiral corresponding with main cutting edge is distributed in brill main chip area on one's body; It is characterized in that the position contacting place is provided with chip area in a pair between the back knife face of described a pair of main cutting edge, form interior cutting edge between chip area and the adjacent back knife face in described; The main chip area that chip area is corresponding with main cutting edge in described is communicated with; Chip area forms a pair of apex point with the highest position that the back knife face contacts respectively in described one pair.
2. a kind of microbit as claimed in claim 1 is characterized in that, described each main cutting edge correspondence respectively is provided with the major first flank and the second back knife face; The major first flank of said each main cutting edge and the second back knife face are intersected in the position of departing from the drill bit axle center, described in chip area be formed at the position that intersects of knife face, second back of two main cutting edges.
3. a kind of microbit as claimed in claim 2 is characterized in that, chip areas are S-shaped with the adjacent formed intersection of back knife face in said two, the described two interior chip areas formation groove that crosses each other, and its axis is on same straight line; Afterwards the intersection of knife face is crossing for chip areas and corresponding major first flank and second in said two, forms two said apex points.
4. a kind of microbit as claimed in claim 2 is characterized in that, said two interior chip areas and the adjacent formed intersection of back knife face intersect S-shaped, and the axis of two interior chip areas is parallel to each other.
5. like claim 3 or 4 described a kind of microbits, it is characterized in that, described in chip area and corresponding main cutting edge second afterwards knife face is tangent.
6. like claim 3 or 4 described a kind of microbits, it is characterized in that, said in chip area intersect with adjacent said major first flank, the formation chisel edge, the total length scope of said chisel edge bit diameter 0.1%～35% between.
7. a kind of microbit as claimed in claim 1 is characterized in that, knife face after said each main cutting edge correspondence is provided with, and said interior chip area and corresponding main cutting edge intersection form two said apex points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120353310 CN202271009U (en) | 2011-09-20 | 2011-09-20 | Micro drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120353310 CN202271009U (en) | 2011-09-20 | 2011-09-20 | Micro drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202271009U true CN202271009U (en) | 2012-06-13 |
Family
ID=46191395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120353310 Withdrawn - After Issue CN202271009U (en) | 2011-09-20 | 2011-09-20 | Micro drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202271009U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357664A (en) * | 2011-09-20 | 2012-02-22 | 深圳市金洲精工科技股份有限公司 | Miniature drill and manufacturing method thereof |
| CN104816342A (en) * | 2015-04-17 | 2015-08-05 | 柳州蔚园塑料彩印包装有限责任公司 | Tempered plastic part boring drill |
| CN107442816A (en) * | 2017-09-07 | 2017-12-08 | 深圳市鑫国钰精密工具有限公司 | Drill bit |
-
2011
- 2011-09-20 CN CN 201120353310 patent/CN202271009U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357664A (en) * | 2011-09-20 | 2012-02-22 | 深圳市金洲精工科技股份有限公司 | Miniature drill and manufacturing method thereof |
| CN104816342A (en) * | 2015-04-17 | 2015-08-05 | 柳州蔚园塑料彩印包装有限责任公司 | Tempered plastic part boring drill |
| CN107442816A (en) * | 2017-09-07 | 2017-12-08 | 深圳市鑫国钰精密工具有限公司 | Drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120613 Effective date of abandoning: 20130904 |
|
| RGAV | Abandon patent right to avoid regrant |