CN104493263A - Double-edge band twist drill with high machining precision - Google Patents
Double-edge band twist drill with high machining precision Download PDFInfo
- Publication number
- CN104493263A CN104493263A CN201410509652.8A CN201410509652A CN104493263A CN 104493263 A CN104493263 A CN 104493263A CN 201410509652 A CN201410509652 A CN 201410509652A CN 104493263 A CN104493263 A CN 104493263A
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- CN
- China
- Prior art keywords
- double
- edge band
- cardinal ligament
- twist drill
- main
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention relates to a double-edge band twist drill with high machining precision. The double-edge band twist drill comprises a cutting part and a handle part, wherein the cutting part comprises a first main edge band and a second main edge band; a main chip guide groove is formed between the first main edge band and the second main edge band; main edges are respectively arranged at the two sides of the first main edge band and the second main edge band; secondary chip guide grooves are respectively formed in the first main edge band and the second main edge band; and secondary edges are arranged in the connected positions of the secondary chip guide grooves and the first main edge band and the second main edge band. Compared with the prior art, the double-edge band twist drill is simple in structure and easy in machining; the secondary chip guide grooves are formed in the main edge bands, and the secondary edges are arranged in the connected positions of the secondary chip guide grooves and the main edge bands, so that the chip guide grooves and the edges are added, the structural strength of the cutting part is enhanced, and the total rigidity of a drill bit is improved. The aperture sizes machined by the drill bit are more stable; and the roughness of part machined surfaces is improved. As the machining stability is improved, the jump of the drill bit is reduced, the abrasion of edge tips of the drill bit is slowed down, and the service life of the drill bit is prolonged.
Description
Technical field
The present invention relates to a kind of drill bit, especially relate to a kind of Double-margin twist drill of high manufacturing accuracy.
Background technology
For other cutter, the rigidity of common fluted drill drill bit is poor, therefore in working angles, easily produces vibration, and processing stability is also poor.The cutting speed at the centre of gyration position of drill bit is almost nil, and has very large negative rake near the sword of center, does not therefore belong to normal and cuts phenomenon but extruding phenomenon, thus process under causing chisel edge to be in eccentric state relative to the centre of gyration.Carry out adding man-hour under this kind of state, owing to being subject to the impact of center sword eccentric orbit, the size in processed hole is often large than the actual outside diameter size of drill bit, namely occur horn mouth phenomenon, and machined surface roughness is low.
Summary of the invention
Object of the present invention is exactly provide the Double-margin twist drill of the high manufacturing accuracy that a kind of processing temperature, integral rigidity are strong to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of Double-margin twist drill of high manufacturing accuracy, comprise cutting tip and shank, described cutting tip comprises the first cardinal ligament and the second cardinal ligament, main dregs guiding groove is formed between the first cardinal ligament and the second cardinal ligament, described first cardinal ligament offers into main cutting edge respectively with the both sides of the second cardinal ligament, the first described cardinal ligament and the second cardinal ligament are offered respectively and forms secondary dregs guiding groove, the junction of this secondary dregs guiding groove and the first cardinal ligament and the second cardinal ligament forms secondary cutting edge.
The width of described secondary dregs guiding groove takes the half of bits well width as the leading factor.
The degree of depth of described secondary dregs guiding groove takes the half of bits groove depth as the leading factor.
Described secondary dregs guiding groove and main dregs guiding groove are parallel double helical structure.
The first described cardinal ligament and the second cardinal ligament are about the distribution in a center of symmetry of the fluted drill centre of gyration.
The first described cardinal ligament is identical with the width of the second cardinal ligament, and equals the width of main dregs guiding groove.
The head end drift angle of described cutting tip is 115 °.
The cross section of described shank is circular, and it is the foursquare clamping part of band chamfering that cross section is offered in shank rear end.
Described cutting tip surface is coated with titanium aluminum nitride coating, and employing carbide alloy is main body.
Compared with prior art, structure of the present invention is simple, is easy to processing, cardinal ligament sets out secondary dregs guiding groove, and makes the junction of secondary dregs guiding groove and cardinal ligament form secondary cutting edge, add dregs guiding groove and cutting edge more, add the structural strength of cutting tip, add the rigidity of drill bit entirety.Drill bit processing aperture size of the present invention is more stable, and the roughness of part machined surface improves.Because the stability of processing improves, bit bounce reduces, and the wearing and tearing of drill bit blade tip are slowed down, and bit life increases.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of Double-margin twist drill of high manufacturing accuracy, as shown in Figure 1, comprise cutting tip 1 and shank 2, cutting tip 1 comprises the first cardinal ligament 3 and the second cardinal ligament 4, main dregs guiding groove 5 is formed between the first cardinal ligament 3 and the second cardinal ligament 4, first cardinal ligament 3 and the both sides of the second cardinal ligament 4 are offered into respectively main cutting edge 6, first cardinal ligament 3 and the second cardinal ligament 4 offer respectively and are formed secondary dregs guiding groove 7, and the junction of this secondary dregs guiding groove 7 and the first cardinal ligament 3 and the second cardinal ligament 4 forms secondary cutting edge 8.Wherein, the width of secondary dregs guiding groove 7 takes the half of bits groove 5 width as the leading factor, the degree of depth of secondary dregs guiding groove 7 takes the half of bits groove 5 degree of depth as the leading factor, secondary dregs guiding groove 7 is parallel double helical structure with main dregs guiding groove 5, first cardinal ligament 3 and the second cardinal ligament 4 are about the distribution in a center of symmetry of the fluted drill centre of gyration, first cardinal ligament 3 is identical with the width of the second cardinal ligament 4, and equals the width of leading bits grain 5.The head end drift angle of cutting tip 1 is 115 °.The cross section of shank 2 is circular, and it is the foursquare clamping part 9 of band chamfering that cross section is offered in shank 2 rear end.
Cutting tip 1 surface is coated with titanium aluminum nitride coating, and employing carbide alloy is main body.
In the present embodiment, cutting tip 1 length is 45mm, and shank 2 length is 45mm.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (9)
1. the Double-margin twist drill of a high manufacturing accuracy, comprise cutting tip (1) and shank (2), described cutting tip (1) comprises the first cardinal ligament (3) and the second cardinal ligament (4), main dregs guiding groove (5) is formed between the first cardinal ligament (3) and the second cardinal ligament (4), described first cardinal ligament (3) offers into main cutting edge (6) respectively with the both sides of the second cardinal ligament (4), it is characterized in that, described the first cardinal ligament (3) and the second cardinal ligament (4) are offered respectively and forms secondary dregs guiding groove (7), this secondary dregs guiding groove (7) forms secondary cutting edge (8) with the first cardinal ligament (3) and the junction of the second cardinal ligament (4).
2. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, the width of described secondary dregs guiding groove (7) takes the half of bits groove (5) width as the leading factor.
3. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, the degree of depth of described secondary dregs guiding groove (7) takes the half of bits groove (5) degree of depth as the leading factor.
4. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, described secondary dregs guiding groove (7) and main dregs guiding groove (5) are parallel double helical structure.
5. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, described the first cardinal ligament (3) and the second cardinal ligament (4) are about the distribution in a center of symmetry of the fluted drill centre of gyration.
6. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, described the first cardinal ligament (3) is identical with the width of the second cardinal ligament (4), and equals the width of main dregs guiding groove (5).
7. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, the head end drift angle of described cutting tip (1) is 115 °.
8. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, it is characterized in that, the cross section of described shank (2) is circular, and it is the band foursquare clamping part of chamfering (9) that cross section is offered in shank (2) rear end.
9. the Double-margin twist drill of a kind of high manufacturing accuracy according to claim 1, is characterized in that, described cutting tip (1) surface is coated with titanium aluminum nitride coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509652.8A CN104493263A (en) | 2014-09-28 | 2014-09-28 | Double-edge band twist drill with high machining precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509652.8A CN104493263A (en) | 2014-09-28 | 2014-09-28 | Double-edge band twist drill with high machining precision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104493263A true CN104493263A (en) | 2015-04-08 |
Family
ID=52934763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410509652.8A Pending CN104493263A (en) | 2014-09-28 | 2014-09-28 | Double-edge band twist drill with high machining precision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104493263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106113171A (en) * | 2016-08-17 | 2016-11-16 | 江苏飞达钻头股份有限公司 | Carpenter's smoothing, reamer |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3325149A1 (en) * | 1983-07-12 | 1985-01-24 | Gühring, Gottlieb, 7470 Albstadt | Two-lipped twist drill as a combined centring, drilling and boring tool |
| CN1116683A (en) * | 1994-06-04 | 1996-02-14 | 希尔蒂股份公司 | Core bits |
| CN1154900A (en) * | 1995-12-07 | 1997-07-23 | 希尔蒂股份公司 | Rotary-impacting-type spiral drill bit |
| DE29722002U1 (en) * | 1997-12-15 | 1998-02-05 | Werkzeugfabrik GmbH Königsee, 07426 Königsee | Twist drill |
| US20110158757A1 (en) * | 2009-12-29 | 2011-06-30 | Jurgen Schwagerl | Rotary cutting tool having sealed margins and method of making same |
| CN102389991A (en) * | 2011-12-06 | 2012-03-28 | 株洲钻石切削刀具股份有限公司 | Double-margin twist drill |
| CN202606943U (en) * | 2012-06-19 | 2012-12-19 | 武汉泰尔斯刀具有限公司 | Four-edge molding drill cutter for through holes |
| CN204148583U (en) * | 2014-09-28 | 2015-02-11 | 上海奥林汽车安全系统有限公司 | The Double-margin twist drill of high manufacturing accuracy |
-
2014
- 2014-09-28 CN CN201410509652.8A patent/CN104493263A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3325149A1 (en) * | 1983-07-12 | 1985-01-24 | Gühring, Gottlieb, 7470 Albstadt | Two-lipped twist drill as a combined centring, drilling and boring tool |
| CN1116683A (en) * | 1994-06-04 | 1996-02-14 | 希尔蒂股份公司 | Core bits |
| CN1154900A (en) * | 1995-12-07 | 1997-07-23 | 希尔蒂股份公司 | Rotary-impacting-type spiral drill bit |
| DE29722002U1 (en) * | 1997-12-15 | 1998-02-05 | Werkzeugfabrik GmbH Königsee, 07426 Königsee | Twist drill |
| US20110158757A1 (en) * | 2009-12-29 | 2011-06-30 | Jurgen Schwagerl | Rotary cutting tool having sealed margins and method of making same |
| CN102389991A (en) * | 2011-12-06 | 2012-03-28 | 株洲钻石切削刀具股份有限公司 | Double-margin twist drill |
| CN202606943U (en) * | 2012-06-19 | 2012-12-19 | 武汉泰尔斯刀具有限公司 | Four-edge molding drill cutter for through holes |
| CN204148583U (en) * | 2014-09-28 | 2015-02-11 | 上海奥林汽车安全系统有限公司 | The Double-margin twist drill of high manufacturing accuracy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106113171A (en) * | 2016-08-17 | 2016-11-16 | 江苏飞达钻头股份有限公司 | Carpenter's smoothing, reamer |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150408 |
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| RJ01 | Rejection of invention patent application after publication |