CN105108210A - Micro three-wing bit and processing method thereof - Google Patents
Micro three-wing bit and processing method thereof Download PDFInfo
- Publication number
- CN105108210A CN105108210A CN201510570840.6A CN201510570840A CN105108210A CN 105108210 A CN105108210 A CN 105108210A CN 201510570840 A CN201510570840 A CN 201510570840A CN 105108210 A CN105108210 A CN 105108210A
- Authority
- CN
- China
- Prior art keywords
- drill
- drilling rod
- miniature
- wing bit
- layout
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/20—Number of cutting edges
- B23B2251/202—Three cutting edges
Abstract
The invention relates to the technical field of drill bits, and discloses a micro three-wing bit and a processing method thereof. The micro three-wing bit comprises a drill stem. The bottom end of the drill stem is provided with a drill end portion. The center of the drill end portion is provided with a drill tip. The periphery of the drill stem is provided with three chip pockets respectively arranged in a spiral manner along the drill stem. The three chip pockets are arranged at interval in sequence. The side edge of the drill end portion is provided with three main cutting edges. The three main cutting edges are arranged around the drill tip in sequence. The drill end portion is provided with three chisel edges, and the three chisel edges surround the drill tip in sequence, and are intersected at the drill tip. The side edge of the drill end portion is provided with three main cutting edges. When the drill tip is drilling, the drill end portion forms three support points, thereby increasing balance of the drill tip and reducing wearing of the main cutting edges. The three chip pockets increase chip removal time, and the length of the chisel edge is enough, thereby increasing core thickness and greatly improving rigidity of the drill tip. Therefore, for the drill tip, in a process of drilling, probability of drill broken phenomenon is greatly reduced.
Description
Technical field
The present invention relates to the technical field of drill bit, particularly relate to miniature three-wing bit and processing method thereof.
Background technology
At present, pcb board is the element be widely used in electronic product, carries out the process of processing at pcb board, often needs drill bit to carry out Drilling operation to pcb board.
Shown in Fig. 1 level 2, in prior art, the drill bit be commonly used in pcb board boring has two symmetrical cutting edges and two symmetrical chip pockets 11, and the drill bit of this structure exists following defect:
1), rigidity is little; Especially for miniature bur, owing to there being two symmetrical chip pockets 11, boring core thickness and become very thin, therefore less rigid, easily occur the phenomenon of the breaking of rod;
2), chisel edge is long; Therefore drill bit is when holing, and the frictional force of apex point and pcb board is large, also causes the phenomenon easily occurring the breaking of rod;
3), easy to wear; Because drill bit is in the process of drilling, the inhomogeneities of drilling cuttings causes two main cutting edges 12 to wear and tear inconsistent, causes, by force unbalance, easily occurring the phenomenon of the breaking of rod.
Summary of the invention
The object of the present invention is to provide miniature three-wing bit, be intended to solve in prior art, the drill bit for pcb board boring exists that rigidity is little, chisel edge long and defect easy to wear, causes drill bit easily to occur the problem of the breaking of rod.
The present invention is achieved in that miniature three-wing bit, comprises the drilling rod in vertical bar shape, and the bottom of described drilling rod is formed bores end, and the center of described brill end is formed with apex point; Form the chip pocket of three layouts of axially spiraling along described drilling rod respectively in the periphery of described drilling rod, three described chip pockets are sequentially arranged separately; Form three main cutting edges at the side of described brill end, three described main cutting edges are sequentially arranged around described apex point; Described brill end is formed with three chisel edges, three described chisel edges are sequentially arranged around described apex point, and intersect at described apex point.
Further, be formed with cell wall between adjacent described chip pocket, described cell wall spirals in the periphery of drilling rod, and extends layout along the axis of described drilling rod, and the side of described cell wall is formed with front cutting edge.
Further, the bottom of described chip pocket and described brill intersect ends, form described main cutting edge.
Further, described brill end is formed with three faces, and three described faces sequentially around layout, and intersect at described apex point, and described main cutting edge is formed in the side of described face, and are formed with described chisel edge in described face.
Further, described face comprises first surface angle and dihedral angle, described first surface angle layout adjacent with dihedral angle, and the intersection of described first surface angle and dihedral angle forms described chisel edge.
Further, described first surface angle and dihedral angle are in being in tilted layout, and described chisel edge is outstanding outside described brill end to be arranged.
Further, described chip pocket is that equal nutation angle is spiraled layout.
Further, described chip pocket to spiral layout in becoming nutation angle.
Present invention also offers the processing method of miniature three-wing bit, comprise following procedure of processing:
1), utilize slot grinding emery wheel to form three chip pockets in the periphery of drilling rod, three described chip pockets spiral along the periphery of described drilling rod layout, and extend along the axis of described drilling rod and arrange;
2), utilize sharpening emery wheel at brill end grinding three faces of described drilling rod, three described faces are sequentially around layout, and three described faces intersect, and form apex point; In each described face, there is chisel edge; Described in each, the side of face is crossing with described chip pocket, forms main cutting edge;
Further, each face includes first surface angle and dihedral angle, described first surface angle layout adjacent with dihedral angle, and intersection forms described chisel edge.
Compared with prior art, miniature three-wing bit provided by the invention, is formed with three main cutting edges at the side boring end, and like this, drill bit, when holing, forms three strong points in brill end, increases balance during bit bore, reduce the wearing and tearing of main cutting edge; Three main cutting edges form three strong points, article three, chip pocket can increase chip space, and the length of chisel edge is also enough, thus it is thick to increase core, thus greatly improve the rigidity of drill bit, therefore, for drill bit, it is carrying out, in the process of holing, greatly reducing the probability occurring breaking of rod phenomenon.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of drill bit of the prior art;
Fig. 2 is the schematic front view of the brill end of drill bit of the prior art;
Fig. 3 is the schematic perspective view of the drill bit that the embodiment of the present invention provides;
Fig. 4 is the schematic front view of the brill end of the drill bit that the embodiment of the present invention provides;
Fig. 5 is the cut-away illustration of the drill bit that the embodiment of the present invention provides.
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.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
As seen in figures 3-5, be preferred embodiment provided by the invention.
Miniature three-wing bit 2 provided by the invention is for holing to pcb board, and certainly, it also may be used for holing to other plates etc., is not limited at pcb board.
Miniature three-wing bit 2 comprises drilling rod 20, and this drilling rod 20 is in vertical bar shape, and the bottom of drilling rod 20 forms brill end, is formed with apex point 23 at the center of boring end; Be formed with three in the periphery of drilling rod 20 along the axial chip pocket 21 arranged that spirals of drilling rod 20, these three chip pockets 21 are sequentially arranged separately; Be formed with three main cutting edges 22 at the side boring end, these three main cutting edges 22 are arranged around apex point 23; Be formed with three chisel edges 28 in brill end, these three chisel edges 28 intersect at apex point 23, and arrange around apex point 23.
The above-mentioned miniature three-wing bit 2 provided, is formed with three main cutting edges 22 at the side boring end, and like this, drill bit 2, when holing, forms three strong points in brill end, increases balance when drill bit 2 is holed, reduces the wearing and tearing of main cutting edge 22; Three main cutting edges 22 form three strong points, article three, chip pocket 21 can increase chip space, and the length of chisel edge 28 is also enough, thus it is thick to increase core, thus greatly improve the rigidity of drill bit 2, therefore, for drill bit 2, it is carrying out, in the process of holing, greatly reducing the probability occurring breaking of rod phenomenon.
In the present embodiment, between adjacent chip pocket 21, be formed with cell wall 24, this cell wall 24 is formed between adjacent chip pocket 21, and spirals outside drilling rod 20, and the axis along drilling rod 20 extends arranges; Front cutting edge is formed at the side of cell wall 24, certainly, this front cutting edge to spiral layout along the axis of drilling rod 20, like this, three front cutting edges are formed with in the periphery of drilling rod 20, like this, when drill bit 2 is when cutting, be formed with three supports at the side of drilling rod 20, overcome drill bit 2 exists asymmetric cutting problem when holing, keeping the balance of cutting force.
Particularly, bottom and the brill intersect ends of chip pocket 21, and intersection forms above-mentioned main cutting edge 22.
In the present embodiment, in brill end, be formed with three faces, these three faces are sequentially around layout, and intersecting at apex point 23, above-mentioned main cutting edge 22 is formed in the side of face, and is formed with above-mentioned chisel edge 28 in each face, like this, three facial three chisel edges 28 intersect at apex point 23.
Particularly, face comprises first surface angle 25 and dihedral angle 26, this first surface angle 25 layout adjacent with dihedral angle 26, and intersects, and intersection defines above-mentioned chisel edge 28.Further, in each face, first surface angle 25 and dihedral angle 26 are in being in tilted layout, and both intersections form chisel edge 28, and this chisel edge 28, relative to first surface angle 25 and dihedral angle 26, is given prominence to and arranged outside brill end.
For chip pocket 21, it can be that equal nutation angle is arranged, also can be become nutation angle to arrange, specifically be determined by actual needs.
The present embodiment additionally provides the processing method of miniature three-wing bit 2, and concrete steps are as follows:
1), utilize slot grinding emery wheel to form three chip pockets 21 in the periphery of drilling rod 20, these three chip pockets 21 are along the axial layout of spiraling of drilling rod 20, and its three chip pockets 21 are sequentially arranged separately;
2), utilize sharpening emery wheel at brill end grinding three faces of drilling rod 20, three faces are sequentially around layout, and three faces intersect, and form apex point 23, are formed with chisel edge 28 in each face; The side of each face is crossing with chip pocket 21, forms main cutting edge 22.
In the above-mentioned processing method provided, by forming three chip pockets 21 in the periphery of drilling rod 20, form three faces in brill end again, three facial sides form three main cutting edges 22 with three chip pockets 21 respectively, are formed with chisel edge 28 in each face, like this, define miniature three-wing bit 2, drill bit 2, when holing, forms three strong points in brill end, increase balance when drill bit 2 is holed, reduce the wearing and tearing of main cutting edge 22; Three main cutting edges 22 form three strong points, article three, chip pocket 21 can increase chip space, and the length of chisel edge 28 is also enough, thus it is thick to increase core, thus greatly improve the rigidity of drill bit 2, therefore, for drill bit 2, it is carrying out, in the process of holing, greatly reducing the probability occurring breaking of rod phenomenon.
Particularly, in each face of grinding, each face includes first surface angle 25 and the dihedral angle 26 of adjacent layout, adjacent layout between first surface angle 25 and dihedral angle 26, and intersection forms chisel edge 28.
In above-mentioned processing method, after chip pocket 21 is formed, between adjacent chip pocket 21, be formed with cell wall 24, this cell wall 24 is formed between adjacent chip pocket 21, and spirals outside drilling rod 20, axis along drilling rod 20 extends arranges, like this, utilize outside sharpening grinding-wheel grinder cell wall 24, make the side of cell wall 24 form front cutting edge.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, 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 (10)
1. miniature three-wing bit, is characterized in that, comprises the drilling rod in vertical bar shape, and the bottom of described drilling rod is formed bores end, and the center of described brill end is formed with apex point; Form the chip pocket of three layouts of axially spiraling along described drilling rod respectively in the periphery of described drilling rod, three described chip pockets are sequentially arranged separately; Form three main cutting edges at the side of described brill end, three described main cutting edges are sequentially arranged around described apex point; Described brill end is formed with three chisel edges, three described chisel edges are sequentially arranged around described apex point, and intersect at described apex point.
2.
as claimminiature three-wing bit described in 1, is characterized in that, be formed with cell wall between adjacent described chip pocket, described cell wall spirals in the periphery of drilling rod, and extends layout along the axis of described drilling rod, and the side of described cell wall is formed with front cutting edge.
3.
as claimminiature three-wing bit described in 1, is characterized in that, the bottom of described chip pocket and described brill intersect ends, form described main cutting edge.
4.
as claimminiature three-wing bit described in 1 to 3 any one, is characterized in that, described brill end is formed with three faces, three described faces are sequentially around layout, and intersecting at described apex point, described main cutting edge is formed in the side of described face, and is formed with described chisel edge in described face.
5.
as claimminiature three-wing bit described in 4, is characterized in that, described face comprises first surface angle and dihedral angle, described first surface angle layout adjacent with dihedral angle, and the intersection of described first surface angle and dihedral angle forms described chisel edge.
6.
as claimminiature three-wing bit described in 5, is characterized in that, described first surface angle and dihedral angle are in being in tilted layout, and described chisel edge is outstanding outside described brill end to be arranged.
7.
as claimminiature three-wing bit described in 1 to 3 any one, is characterized in that, described chip pocket is that equal nutation angle is spiraled layout.
8.
as claimminiature three-wing bit described in 1 to 3 any one, is characterized in that, described chip pocket to spiral layout in becoming nutation angle.
9. the processing method of miniature three-wing bit, is characterized in that, comprises following procedure of processing:
1), utilize slot grinding emery wheel to form three chip pockets in the periphery of drilling rod, three described chip pockets spiral along the periphery of described drilling rod layout, and extend along the axis of described drilling rod and arrange;
2), utilize sharpening emery wheel at brill end grinding three faces of described drilling rod, three described faces are sequentially around layout, and three described faces intersect, and form apex point; In each described face, there is chisel edge; Described in each, the side of face is crossing with described chip pocket, forms main cutting edge.
10.
as claimthe processing method of the miniature three-wing bit described in 9 any one, is characterized in that, each face includes first surface angle and dihedral angle, described first surface angle layout adjacent with dihedral angle, and intersection forms described chisel edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510570840.6A CN105108210A (en) | 2015-09-08 | 2015-09-08 | Micro three-wing bit and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510570840.6A CN105108210A (en) | 2015-09-08 | 2015-09-08 | Micro three-wing bit and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105108210A true CN105108210A (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510570840.6A Pending CN105108210A (en) | 2015-09-08 | 2015-09-08 | Micro three-wing bit and processing method thereof |
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| Country | Link |
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| CN (1) | CN105108210A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984309A (en) * | 2016-10-26 | 2018-05-04 | 北京实验工厂 | A kind of precise small-diameter cutter sharpening device of gun drill and grinding method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416494A (en) * | 2011-12-09 | 2012-04-18 | 深圳市金洲精工科技股份有限公司 | Micro drill and processing method thereof |
| CN104379284A (en) * | 2012-05-30 | 2015-02-25 | Osg株式会社 | 3-blade drill |
-
2015
- 2015-09-08 CN CN201510570840.6A patent/CN105108210A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416494A (en) * | 2011-12-09 | 2012-04-18 | 深圳市金洲精工科技股份有限公司 | Micro drill and processing method thereof |
| CN104379284A (en) * | 2012-05-30 | 2015-02-25 | Osg株式会社 | 3-blade drill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984309A (en) * | 2016-10-26 | 2018-05-04 | 北京实验工厂 | A kind of precise small-diameter cutter sharpening device of gun drill and grinding method |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151202 |
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| RJ01 | Rejection of invention patent application after publication |