CN202291543U - Drill bit - Google Patents
Drill bit Download PDFInfo
- Publication number
- CN202291543U CN202291543U CN2011204428424U CN201120442842U CN202291543U CN 202291543 U CN202291543 U CN 202291543U CN 2011204428424 U CN2011204428424 U CN 2011204428424U CN 201120442842 U CN201120442842 U CN 201120442842U CN 202291543 U CN202291543 U CN 202291543U
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- CN
- China
- Prior art keywords
- chip removal
- removal ditch
- ditch
- length
- central axis
- Prior art date
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Abstract
Provided is a drill bit. A first chip removing ditch, a second chip removing ditch and a third chip removing ditch are manufactured on the surface through a plurality of cutting processes, lengths of chip removing ditches are different from each other, wherein the third chip removing ditch leads the drill pit to be capable of using a single cutting edge for cutting. Therefore, when diameter of the drill pit is downsized, a drill body still has good rigidity and good chip removing effect, and the drill bit can accurately manufacture miniature holes and is not easy to break.
Description
Technical field
The utility model is relevant with cutting element, more detailed is meant a kind of drill bit.
Background technology
Fig. 1 is extremely shown in Figure 3 to be general common drill bit structure, comprises that one bores a body 1 and a shank 2.This brill body 1 surface has the symmetrically arranged chip removal ditch 3 of twice; The length that is each chip removal ditch 3 is identical with the degree of depth; And chip removal ditch 3 is cooperating the chisel edge portion of boring body 1 front end to be constituted by a drill lip 1a and the face 1b that escapes, 1c, 1d, 1e on four sides, brings into play drilling and the effect of in time smear metal being discharged according to this.
Only, when drill bit was applied to the processing and fabricating of miniature hole, it bored the relative downsizing of body 1 diameter, and still kept under the situation with the symmetrically arranged chip removal ditch 3 of twice at brill body 1, certainly will make that boring body 1 rigidity reduces; Secondly, bore body 1 front end and have two cutting blade 1f, 1g, when cutting, because of being all the stressed load burden that increases brill body 1, so be prone to cause brill body 1 that the bad situation of fracture takes place in drilling process.The whence this; There is the dealer spy to be directed against the processing of miniature hole and to develop a kind of drill bit that only has single chip removal ditch; Phase is still can preferablely operate under the prerequisite of boring body rigidity deficiency; Like TaiWan, China application case number No. 094115093 " drill bit " patent of invention case, promptly be to disclose drill bit structure with single chip removal ditch, the technical characterictic of this patent case is to use for mainly smear metal being discharged with single chip removal ditch (joining this case specification label 1); Go out the groove of a development length in the chisel edge cutting again much smaller than " the non-point symmetry position " of aforementioned chip removal ditch; Like accompanying drawing Fig. 2 of its specification and shown in Figure 3, wherein the limit sword of this groove (joining this case specification label 9a) is to extend towards aforementioned chip removal ditch direction, in other words; This patent case technology is to carry out cutting operation with the monolateral cutting blade that is formed at chip removal ditch front edge; The limit sword that is formed at the groove front edge then is not cut thing with positive way of contact contact, and this design can reduce the drill bit reaction force that institute must bear when cutting burden, and then under the due rigidity of drill bit itself, operates smoothly.Only, there is following shortcoming in this patent case technology:
1. its chip removal ditch and groove are the structural form existence with " non-point symmetry position " to each other; Easy speech; Its drill bit is at the uneven thickness of the overlapping part at chip removal ditch and groove place, and the development length drop of chip removal ditch and groove is very big, and relatively easy push effect power because of chip removal ditch and smear metal that groove bears differs; And cause the central axis of drill bit to squint to some extent, be prone to cause the miniature bore hole size of institute's drilling slightly to be the reaming shape.
2. the development length of its groove is much smaller than the development length of chip removal ditch, so cause smear metal to pile up or tangle at chisel edge easily, causes the influential anxiety that is cut subject surface.
The utility model content
In view of this, the main purpose of the utility model is to provide a kind of drill bit, and it has good chip removal effect and favorable rigidity.
Edge is to reach above-mentioned purpose, and the drill bit that the utility model provided comprises one and bores body, one first chip removal ditch, one second chip removal ditch and one the 3rd chip removal ditch.Wherein, this brill body has a front end, a terminal and central axis, and this front end has one first escape face, one second escape face, one the 3rd escape face, one the 4th an escape face and a drill lip, and this drill lip is positioned on the bearing of trend of this central axis; The first chip removal ditch and the second chip removal ditch do not occur simultaneously each other ground distinctly from this brills body front end toward end direction in the shape of a spiral shape extension cut and establish; And the length that the first chip removal ditch is projeced on this central axis is to be projeced into the length on this central axis greater than the second chip removal ditch; In addition, the confluce of this first chip removal ditch and this first escape face forms a cutting blade; And the 3rd chip removal ditch extends to cut toward end direction from this brill body front end and establishes; And communicate with this second chip removal ditch; The length that the 3rd chip removal ditch is projeced on this central axis is projeced into the length on this central axis less than the second chip removal ditch; And the 3rd chip removal ditch and the 3rd escape face form sword on one side with the confluce of this second escape face, and this limit sword is to extend towards this first chip removal ditch direction.
In one embodiment; Be close to this first escape face and one first cutting edge of a knife or a sword limit arranged with the 4th escape mask; Being close to this second escape face has one second cutting edge of a knife or a sword limit with the 3rd escape mask, and this first and second cutting edge of a knife or a sword limit is a relative position in these drill lip both sides respectively, and the first cutting edge of a knife or a sword edge lengths is greater than the second cutting edge of a knife or a sword edge lengths.
In one embodiment, this second chip removal ditch is projeced into the length on this central axis, is to be projeced into the half the of length on this central axis greater than this first chip removal ditch.
In one embodiment; This second chip removal ditch includes a leading portion and a back segment; This leading portion is to be shape symmetry and the identical setting of slope with a corresponded manner with this first chip removal ditch, and should before segment length be projeced into 2/3rds of total length on this central axis greater than the second chip removal ditch.
In one embodiment, the 3rd chip removal ditch is projeced into the length on this central axis, is to be projeced into 1/3rd of length on this central axis less than this second chip removal ditch.
In one embodiment, this first, second and the degree of depth of the 3rd chip removal ditch taper off toward end direction from this brill body front end.
The beneficial effect of the utility model is: drill bit can be possessed good rigidity and easy fracture not, and can guarantee the processing dimension and the positional precision of miniature hole because of its chip removal is respond well.
Description of drawings
For being illustrated more clearly in the utility model, enumerate below that preferred embodiment and conjunction with figs. specify as after, wherein:
Fig. 1 is the stereogram of known drill bit;
Fig. 2 is a drill bit cutaway view shown in Figure 1;
Fig. 3 is the front end view of drill bit shown in Figure 1;
Fig. 4 is the drill bit cutaway view of the utility model one preferred embodiment;
Fig. 5 is the partial enlarged drawing of Fig. 4;
Fig. 6 is the front end view of drill bit shown in Figure 5;
Fig. 7 is the 7-7 direction cutaway view of Fig. 5; And
Fig. 8 is the making flow chart of the utility model drill bit.
The specific embodiment
See also the drill bit of Fig. 4 to the utility model one preferred embodiment shown in Figure 8, this drill bit 100 is that the metallic rod shaped material that rotates makes through the multiple tracks cutting process and has a shank 10 and a brill body 20.In the present embodiment, this brill body 20 has more one first chip removal ditch 30, one second chip removal ditch 32 and one the 3rd chip removal ditch of producing in the surface through the different feed strokes in three roads 34.The thin portion architectural feature and the forming method thereof of this drill bit 100 below are described, wherein:
This brill body 20 is to have a front end 20a, a terminal 20b and a central axis C, and this end 20b connects this shank 10.
This first chip removal ditch 30 is cut through the depth of cut of one first stroke by the metallic rod shaped material that rotates and is made; Its structural form is from the shape extension setting in the shape of a spiral of the past terminal 20b direction of this brill body 20 front end 20a, and the degree of depth tapers off with first slope toward terminal 20b direction from this front end 20a.In this definition, the length that this first chip removal ditch 30 is projeced on this central axis C is first length L 1, and this first length L 1 is first stroke of cutting tool feed.
This second chip removal ditch 32 is cut through the depth of cut of one second stroke by cutting tool and is made, and the distance of aforementioned second stroke is less than this first stroke distances, but greater than half of this first stroke distances.Its structural form is the mode of occuring simultaneously with the first chip removal ditch 30 with not, should bore certainly body 20 front end 20a toward terminal 20b direction in the shape of a spiral shape extend and be provided with, and the degree of depth also is slowly toward terminal 20b direction from this front end 20a and successively decreases.Define in this, the length that this second chip removal ditch 32 is projeced on this central axis C is second length L 2 again, and this second length L 2 is less than this first length L 1, but half the greater than this first length L 1.In addition specifically; The second chip removal ditch 32 is to include a leading portion 32a and a back segment 32b; And this leading portion 32a is with a corresponded manner and this first chip removal ditch 30 to be symmetrical set; Said " some corresponded manner " is with as shown in Figure 7, promptly be meant this second chip removal ditch 32 shape be the corresponding person of setting with the first chip removal ditch 30, and second slope that this leading portion 32a successively decreases is same as first slope that the first chip removal ditch 30 successively decreases; This leading portion 32a length is being good greater than 2/3rds of this second length L 2 again; This design can be guaranteed to bore body 20 and on average born from the push effect power that smear metal brought that is arranged in the first chip removal ditch 30 and the second chip removal ditch 32, further keeps the central axis C position, that is does not have the reaming situation and take place and guarantee processing quality; As for this back segment 32b, then be provided with bigger inclination slope, have the effect of drawing smear metal fast, and can avoid tangling each other each other from the smear metal of the first chip removal ditch 30 and 32 discharges of the second chip removal ditch.
The 3rd chip removal ditch 34 cut through the depth of cut of a third trip by cutting tool and is made, and the distance of third trip is less than this second stroke distances, and specifically, third trip is apart from being being good less than 1/3rd of this second stroke distances.Its structural form slightly is to extend to cut toward terminal 20b direction from this brill body 20 front end 20a to be established, and communicates with this second chip removal ditch 32, and the degree of depth is also for tapering off toward terminal 20b direction from this front end 20a.In this definition, the length that the 3rd chip removal ditch 34 is projeced on this central axis C is the 3rd length L 3, and the 3rd length L 3 is less than 1/3rd of this second length L 2.
After the making of accomplishing the first chip removal ditch 30, the second chip removal ditch 32 and the 3rd chip removal ditch 34 successively; Again this brill body 20 front end 20a are imposed the grinding of special angle, so that this front end 20a is formed with one first to fourth an escape face 21-24 and a drill lip 25, wherein; This drill lip 25 is positioned on the bearing of trend of this central axis C; And be used for contacting at first thing to be processed, when this first to fourth escape face 21-24 is that then this drill bit 100 carries out drilling, have the effect of the smear metal of allocating.
In addition; This bores body 20 front end 20a and respectively should form simultaneously by escape face; Not only be formed with the cutting blade 26 of a conduct cutting usefulness in this first escape face 21 and the confluce of this first chip removal ditch 30; More be formed with sword 27 on one side in the confluce of this second escape face 22 and the 3rd escape face 23 and the 3rd chip removal ditch 34, please join shown in Figure 6ly, this limit sword 27 is to be to extend with arc towards the direction of this first chip removal ditch 30 to form; So far, make the position different with the length on one second cutting edge of a knife or a sword limit 29 at these drill lip 25 both sides relative positions and curved one first cutting edge of a knife or a sword limit 28.More particularly, the first cutting edge of a knife or a sword limit, 28 length that are adjacent to the first escape face 21 and the 4th escape face 24 are the length greater than the second cutting edge of a knife or a sword limit 29 that is adjacent to the second escape face 22, this special construction design; When guaranteeing that drill bit 100 is used for miniature hole processing and fabricating, this limit sword 27 is tool cutting function not, in other words; Only this cutting blade 26 has shear action; The brill body 20 that causes drill bit 100 is because of reducing the burden of resistance to cutting, and, cooperating the first chip removal ditch 30, the second chip removal ditch 32 and the 3rd chip removal ditch 34 to design for different length; Not only guarantee to bore body 20 and keep favorable rigidity; And the probability of fracture significantly reduce to take place, more because of boring the first chip removal ditch 30, the second chip removal ditch 32 and the 3rd chip removal ditch 34 that body 20 has said different length, and can be effectively with smear metal from diverse location guiding discharge; It not only possesses good chip removal effect, more can avoid smear metal to tangle.
Be with, when the bit diameter downsizing of the utility model, it bores body and still has good rigidity and good chip removal effect, make miniature hole accurately, and easy fracture not.
Claims (6)
1. a drill bit is characterized in that, comprises:
One bores body, has a front end, a terminal and central axis, and wherein this front end has one first escape face, one second escape face, one the 3rd escape face, one the 4th an escape face and a drill lip, and this drill lip is positioned on the bearing of trend of this central axis;
One first chip removal ditch and one second chip removal ditch; Be do not occur simultaneously ground distinctly from this brills body front end toward end direction in the shape of a spiral shape extension cut and establish; And the length that the first chip removal ditch is projeced on this central axis is projeced into the length on this central axis greater than the second chip removal ditch, and the confluce of this first chip removal ditch and this first escape face forms a cutting blade; And
One the 3rd chip removal ditch; Extend to cut toward end direction from this brill body front end and establish; And communicate with this second chip removal ditch; The length that the 3rd chip removal ditch is projeced on this central axis is projeced into the length on this central axis less than the second chip removal ditch, and formation one side, confluce sword of the 3rd chip removal ditch and the 3rd escape face and this second escape face, and this limit sword extends towards this first chip removal ditch direction.
2. drill bit as claimed in claim 1; It is characterized in that; Wherein be close to this first escape face and one first cutting edge of a knife or a sword limit arranged with the 4th escape mask; Being close to this second escape face has one second cutting edge of a knife or a sword limit with the 3rd escape mask, and this first and second cutting edge of a knife or a sword limit is a relative position in these drill lip both sides respectively, and the first cutting edge of a knife or a sword edge lengths is greater than the second cutting edge of a knife or a sword edge lengths.
3. drill bit as claimed in claim 1 is characterized in that, wherein this second chip removal ditch is projeced into the length on this central axis, is projeced into the half the of length on this central axis greater than this first chip removal ditch.
4. drill bit as claimed in claim 3; It is characterized in that; Wherein this second chip removal ditch includes a leading portion and a back segment; This leading portion is shape symmetry and the identical setting of slope with a corresponded manner with this first chip removal ditch, and should before segment length be projeced into 2/3rds of total length on this central axis greater than the second chip removal ditch.
5. like claim 1 or 3 described drill bits, it is characterized in that wherein the 3rd chip removal ditch is projeced into the length on this central axis, be projeced into 1/3rd of length on this central axis less than this second chip removal ditch.
6. drill bit as claimed in claim 1 is characterized in that, wherein this first, second and the degree of depth of the 3rd chip removal ditch taper off toward end direction from this brill body front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204428424U CN202291543U (en) | 2011-11-10 | 2011-11-10 | Drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204428424U CN202291543U (en) | 2011-11-10 | 2011-11-10 | Drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202291543U true CN202291543U (en) | 2012-07-04 |
Family
ID=46360522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204428424U Expired - Fee Related CN202291543U (en) | 2011-11-10 | 2011-11-10 | Drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202291543U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100740A (en) * | 2011-11-10 | 2013-05-15 | 高侨自动化科技股份有限公司 | Drill and manufacturing method thereof |
| CN103752911A (en) * | 2013-12-31 | 2014-04-30 | 深圳市金洲精工科技股份有限公司 | Miniature drill bit and machining method thereof |
| CN106270666A (en) * | 2016-09-30 | 2017-01-04 | 深圳市金洲精工科技股份有限公司 | A kind of single-blade microbit |
-
2011
- 2011-11-10 CN CN2011204428424U patent/CN202291543U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100740A (en) * | 2011-11-10 | 2013-05-15 | 高侨自动化科技股份有限公司 | Drill and manufacturing method thereof |
| CN103752911A (en) * | 2013-12-31 | 2014-04-30 | 深圳市金洲精工科技股份有限公司 | Miniature drill bit and machining method thereof |
| CN106270666A (en) * | 2016-09-30 | 2017-01-04 | 深圳市金洲精工科技股份有限公司 | A kind of single-blade microbit |
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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: 20120704 Termination date: 20141110 |
|
| EXPY | Termination of patent right or utility model |