CN104551122A - Twist drill with variable apex angle - Google Patents
Twist drill with variable apex angle Download PDFInfo
- Publication number
- CN104551122A CN104551122A CN201410842277.9A CN201410842277A CN104551122A CN 104551122 A CN104551122 A CN 104551122A CN 201410842277 A CN201410842277 A CN 201410842277A CN 104551122 A CN104551122 A CN 104551122A
- Authority
- CN
- China
- Prior art keywords
- drill
- drift angle
- apex angle
- fluted drill
- drill bit
- 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
Links
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
- B23B2251/04—Angles, e.g. cutting angles
- B23B2251/043—Helix angles
- B23B2251/046—Variable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a twist drill with a variable apex angle. The twist drill is characterized by comprising a drill handle (1), a neck (2) and a drill bit (3) sequentially, the drill bit (3) comprises a lateral cutting blade (4), a chipping discharge groove (5) and a rear cutter surface (6) at the top of the drill bit, the rear cutter surface is provided with a chipping distribution groove (7), and the apex angle of the rear cutter surface (6) is increased smoothly and gradually from the drill point to the edge. The twist drill has the advantages that with the variable apex angle, the apex angle of the drill point is small, workpiece is easy to cut, heat radiation is facilitated, and machining efficiency is improved; the successive apex angle is gradually increased smoothly, the problems of deformation and breakage easily caused by small apex angle and low strength are avoided, service life of a cutter is prolonged and replacement frequency is reduced.
Description
Technical field
The present invention relates to Cutting Tool Technology Used on NC field, be specifically related to a kind of change drift angle fluted drill.
Background technology
Fluted drill is still a kind of most widely used, cutter that adaptability is the strongest so far in boring.According to statistics, in the machining of some industry, the expense of drilling operating can reach 30%; The U.S. consumes every year and reaches 1.5 hundred million dollars in the expense of drilling operating.Produce from the manufacture of fluted drill, occupy very large proportion, foreign statistic in cutting tool industry, the gross weight of producing drill bit generally accounts for produces 60% of cutter gross weight; And the high-speed steel that China produces drill bit is every year about 70% of total cutter production high speed steel total amount consumed.
The design geometries existing defects of tradition fluted drill, these defects make that fluted drill efficiency in drilling process is low, quick abrasion, drastically influence hole machined efficiency.Therefore, how to improve the cutting ability of fluted drill and increase the service life, being subject to the attention of domestic and international machine-building producer and instrument research department always.。
Summary of the invention
For solving deficiency of the prior art, the invention provides a kind of change drift angle fluted drill, solving the problem that fluted drill working (machining) efficiency is low.
In order to realize above-mentioned target, the present invention adopts following technical scheme: a kind of change drift angle fluted drill, it is characterized in that, comprise drillstock, neck, drill bit successively, described drill bit comprises the rear knife face at side cutting edge, chip area and drill bit top, rear knife face is provided with chip dividing groove, and the corner angle at rear knife face place smoothly increases from apex point gradually to edge.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described fluted drill overall length L is 159mm.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described drill bit 3 diameter D is 12.8mm.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described drillstock 1 is staight shank.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described side cutting edge 4 pitch angle alpha will is 25 °.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described chip dividing groove 7 has 2.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described drift angle is at apex point place β
0it is 90 °.
Aforesaid one becomes drift angle fluted drill, and it is characterized in that, described drift angle is at rear knife face edge β
1it is 130 °.
The beneficial effect that the present invention reaches: adopt and become drift angle structure, apex point place drift angle is little, easily cuts workpiece, and is beneficial to heat radiation, improve working (machining) efficiency; Follow-up drift angle smoothly increases gradually, avoids because drift angle is less, and the distortion that intensity is less easily to be caused, fracture problem, extends cutting-tool's used life, reduces replacement frequency.
Accompanying drawing explanation
Fig. 1 is a kind of change drift angle fluted drill structural representation;
Fig. 2 is a kind of change drift angle fluted drill partial structurtes schematic diagram;
The implication of Reference numeral in figure: 1-drillstock, 2-neck, 3-drill bit, 4-side cutting edge, 5-chip area, knife face after 6-, 7-chip dividing groove.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, a kind of change drift angle fluted drill, it is characterized in that, comprise drillstock 1, neck 2, drill bit 3 successively, described drill bit comprises the rear knife face 6 at side cutting edge 4, chip area 5 and drill bit top, rear knife face is provided with chip dividing groove 7, and the corner angle at rear knife face place smoothly increases from apex point gradually to edge.
Described fluted drill overall length L is 159mm, and drill bit 3 diameter D is 12.8mm.Drillstock 1 is staight shank, and side cutting edge 4 pitch angle alpha will is 25 °, and chip dividing groove 7 has 2.Drift angle is at apex point place β
0be 90 °, drift angle is at rear knife face edge β
1it is 130 °.
As shown in Figure 2, become drift angle structure and make the less drift angle in apex point place easily cut workpiece, axial drag is less, and cutting edge active length is increased, and nominal thickness of cut reduces, and is conducive to heat radiation and improves tool life; Avoid simultaneously too small due to drift angle and cause drill bit remitted its fury, distortion increases, moment of torsion increases, the problem of drill bit frangibility, improves the cutting ability of fluted drill and hole machined efficiency and precision.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (8)
1. one kind becomes drift angle fluted drill, it is characterized in that, comprise drillstock (1), neck (2), drill bit (3) successively, described drill bit (3) comprises the rear knife face (6) at side cutting edge (4), chip area (5) and drill bit top, rear knife face is provided with chip dividing groove (7), the corner angle at rear knife face (6) place smoothly increases from apex point gradually to edge.
2. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described fluted drill overall length L is 159mm.
3. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described drill bit (3) diameter D is 12.8mm.
4. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described drillstock (1) is staight shank.
5. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described side cutting edge (4) pitch angle alpha will is 25 °.
6. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described chip dividing groove (7) has 2.
7. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described drift angle is at apex point place β
0it is 90 °.
8. one according to claim 1 becomes drift angle fluted drill, and it is characterized in that, described drift angle is at rear knife face edge β
1it is 130 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842277.9A CN104551122A (en) | 2014-12-30 | 2014-12-30 | Twist drill with variable apex angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842277.9A CN104551122A (en) | 2014-12-30 | 2014-12-30 | Twist drill with variable apex angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104551122A true CN104551122A (en) | 2015-04-29 |
Family
ID=53068775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410842277.9A Pending CN104551122A (en) | 2014-12-30 | 2014-12-30 | Twist drill with variable apex angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104551122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225272A (en) * | 2016-03-23 | 2017-10-03 | 江苏天工工具有限公司 | A kind of high speed steel twist drill used on lathe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910003A (en) * | 2004-03-17 | 2007-02-07 | 钴碳化钨硬质合金公司 | Twist drill |
| CN201147858Y (en) * | 2006-06-09 | 2008-11-12 | 中国江苏天工工具有限公司 | High-performance strong twist drill |
| CN102145400A (en) * | 2011-04-27 | 2011-08-10 | 江苏飞达钻头股份有限公司 | Twist drill with changeable helical angles |
| EP2441544A1 (en) * | 2010-10-15 | 2012-04-18 | Utensileria Navone S.n.c. di Navone Giovanni & C. | Tip for drilling tool. |
| WO2013042914A1 (en) * | 2011-09-23 | 2013-03-28 | Taegutec Ltd. | Drilling tool for composite material |
| CN203045000U (en) * | 2013-01-28 | 2013-07-10 | 神龙汽车有限公司 | Hard alloy high-speed twist drill |
| CN204396998U (en) * | 2014-12-30 | 2015-06-17 | 苏州欧美克合金工具有限公司 | A kind of change drift angle fluted drill |
-
2014
- 2014-12-30 CN CN201410842277.9A patent/CN104551122A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910003A (en) * | 2004-03-17 | 2007-02-07 | 钴碳化钨硬质合金公司 | Twist drill |
| CN201147858Y (en) * | 2006-06-09 | 2008-11-12 | 中国江苏天工工具有限公司 | High-performance strong twist drill |
| EP2441544A1 (en) * | 2010-10-15 | 2012-04-18 | Utensileria Navone S.n.c. di Navone Giovanni & C. | Tip for drilling tool. |
| CN102145400A (en) * | 2011-04-27 | 2011-08-10 | 江苏飞达钻头股份有限公司 | Twist drill with changeable helical angles |
| WO2013042914A1 (en) * | 2011-09-23 | 2013-03-28 | Taegutec Ltd. | Drilling tool for composite material |
| CN203045000U (en) * | 2013-01-28 | 2013-07-10 | 神龙汽车有限公司 | Hard alloy high-speed twist drill |
| CN204396998U (en) * | 2014-12-30 | 2015-06-17 | 苏州欧美克合金工具有限公司 | A kind of change drift angle fluted drill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225272A (en) * | 2016-03-23 | 2017-10-03 | 江苏天工工具有限公司 | A kind of high speed steel twist drill used on lathe |
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Legal Events
| 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: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |