CN101549422B - Special screw tap for machining titanium alloy - Google Patents
Special screw tap for machining titanium alloy Download PDFInfo
- Publication number
- CN101549422B CN101549422B CN2009100115358A CN200910011535A CN101549422B CN 101549422 B CN101549422 B CN 101549422B CN 2009100115358 A CN2009100115358 A CN 2009100115358A CN 200910011535 A CN200910011535 A CN 200910011535A CN 101549422 B CN101549422 B CN 101549422B
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- machining
- cutting
- screw tap
- angle
- titanium alloy
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Abstract
A special screw tap for machining titanium alloy is an improvement on the structure of a cutting tool, in particular to a screw tap for machining thread on titanium alloy material. The special screw tap for machining titanium alloy comprises a tail part, a handle part, a calibration part and a cutting part and is characterized by machining a tool cutting edge angle of the cutting part to 0.30 degree; machining a hook angle into a positive rake angel of 8 to 10 degrees; machining a clearance angle to 0.30 degree; machining a seamed edge to 0 degree and machining width of the seamed edge to 0.2 mm; skipping tooth, i.e. one spiral groove is processed by each three cutting teeth; and interlocking tooth, i.e. four groups of cutting teeth are machined into right blade and left blade by interval.The invention has the advantages of prolonging service life of the screw tap and adopting the screw tap to displace a common screw tap with three forming a group for machining thread.
Description
Technical field:
The invention be a kind of on titanium alloy material the screw tap of machining screw, be improvement to the cutting portion structure.
Background technology:
Titanium alloy material is used and is got more and more on aircraft, and machining screw is to adopt one group three regular tap thereon at present, and cylinder or circular cone distribute allowance, adds three screw tap gradation processing of needs in man-hour; The regular tap tool cutting edge angle is made 1 °-2 °, and angle is big, axially and radial cutting force bigger; Anterior angle is made 3 °-5 °, and angle is little, and radial load is bigger during cutting, and " killing " phenomenon easily takes place; Relief angle is made 6 °-8 °, and angle is big, often makes regular tap the tipping phenomenon occur; Because of screw tap is a molding cutter, the omnidistance participation of correction portion cut during cutting, and axial force is big, and disorderly button phenomenon easily takes place, and because of cutting force is big, screw tap weares and teares easily, and production efficiency and cutter life are all very low.
Summary of the invention:
The purpose of the invention provides a kind of raising screw tap life-span and the one-time formed special screw tap for machining titanium alloy of energy; The purpose of the invention is to realize by following technical scheme: special screw tap for machining titanium alloy, comprise afterbody, shank, calibration portion and cutting portion, it is characterized in that the tool cutting edge angle of cutting portion is made 0 ° 30 "; Anterior angle is made 8 °-10 ° positive rake angle; Relief angle is made 0 ° 30 "; Seamed edge is made 0 °, wide 0.2mm; Jump tooth: three cutting teeths in every interval are made a helicla flute; Side set: with four groups of cutting teeths at interval make right sword and left sword.
The advantage of the invention: owing to adopted the tool cutting edge angle littler, therefore can reduce the blade load, increase point of a knife intensity than regular tap; Since adopted the anterior angle bigger than regular tap, the resistance of can reducing friction, thus reduce cutting force and heat in metal cutting, make cutting laborsaving; Because relief angle is made dual relief angle, makes the blade passivation, can protect cutting edge, avoids tipping, prolong the life-span of screw tap and improve working (machining) efficiency; Owing to adopted left sword and right sword, unit cutting force reduces; Owing to adopted three helical tooths in every interval to make a helicla flute, improve cutting deformation and friction condition, prevent disorderly button or tipping; Owing to adopt rational cutting angle, replaced one group three regular tap with this screw tap machining screw, with once finishing processing tasks to special screw tap.
Description of drawings:
Fig. 1 is the special screw tap for machining titanium alloy structural representation;
Fig. 2 is the A-A tangent plane schematic diagram among Fig. 1;
Fig. 3 is an I place enlarged diagram among Fig. 2;
Fig. 4 is that left sword and right sword launch schematic diagram;
Among the figure: 1, anterior angle 2, seamed edge 3, relief angle 4, core 5, tool cutting edge angle 6, jumping tooth 7, side set 8, afterbody 9, shank 10, calibration portion 11, cutting portion
The specific embodiment:
Special screw tap for machining titanium alloy comprises afterbody, shank, calibration portion and cutting portion, it is characterized in that the tool cutting edge angle of cutting portion is made 0 ° 30 "; Anterior angle is made 8 °-10 ° positive rake angle; Relief angle is made 0 ° 30 "; Seamed edge is made 0 °, wide 0.2mm; Jump tooth: three cutting teeths in every interval are made a helicla flute; Side set: with four groups of cutting teeths at interval make right sword and left sword.
Because cutting portion has adopted the tool cutting edge angle littler than regular tap, because of the size influence guiding of tool cutting edge angle, thickness of cutting and size axial, radial cutting force, getting tool cutting edge angle is 0 ° 30 " can reduce the blade load, increase point of a knife intensity.
Owing to adopted the positive rake angle bigger than regular tap, reduce elastic-plastic deformation and the smear metal when flowing out and the frictional resistance of rake face of smear metal when cut, thereby reduce cutting force and heat in metal cutting, make cutting laborsaving, get 8 °-10 ° of bigger positive rake angles obtaining progression cutting effect, and whole cutting edge produced when avoiding cutting and impact and shear effect that method obtains.
Owing to adopt positive rake angle to be not enough to guarantee to obtain optimum performance; because big positive rake angle lowers cutter intensity; this just needs little relief angle to remedy; seamed edge adopts the higher zero initial angle of intensity; relief angle adopts 0 ° 30 " avoided drought to collapse cutter; to improve the blade crushing resistance and prolonged cutter life, improved working (machining) efficiency.
Owing to adopted the side set structure, see along hand of helix that promptly first tooth stays left sword, the right tooth of relief grinding; Second tooth stays right sword, relief grinding left side tooth, by that analogy.A cutter tooth has only a side tooth to play shear action after the side set reconditioning, and the cutting layer thickness of per tooth increases and is twice, and unit cutting force reduces.Original pitch is constant.
Be the jumping tooth owing to adopted three helical tooths in every interval to make a helicla flute, promptly see along hand of helix, the working portion cutter tooth of screw tap is removed a cutter tooth along three cutters tooth of pitch, promptly constitute helicla flute, cutting deformation and friction condition be can improve, profile of tooth plucking, random button and tipping prevented.
Owing to adopt rational cutting angle, process with this screw tap and replaced one group three regular tap, with once finishing processing tasks to special screw tap.
Tradition screw tap core body is own diameter d * 0.4, and special screw tap for machining titanium alloy is own diameter d * 0.6, so the core body of cutting portion is 1.5 times of traditional screw tap core body, has improved himself intensity, prevents that screw tap from fractureing.
Claims (1)
1. special screw tap for machining titanium alloy comprises afterbody, shank, calibration portion and cutting portion, and jump tooth: three cutting teeths in every interval are made a helicla flute; Side set: with four groups of cutting teeths at interval make right sword and left sword, it is characterized in that the tool cutting edge angle of cutting portion is made 0 ° 30 "; Anterior angle is made 8 °-10 ° positive rake angle; Relief angle is made 0 ° 30 "; Seamed edge is made 0 °, wide 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100115358A CN101549422B (en) | 2009-05-14 | 2009-05-14 | Special screw tap for machining titanium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100115358A CN101549422B (en) | 2009-05-14 | 2009-05-14 | Special screw tap for machining titanium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549422A CN101549422A (en) | 2009-10-07 |
| CN101549422B true CN101549422B (en) | 2011-06-15 |
Family
ID=41154038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100115358A Expired - Fee Related CN101549422B (en) | 2009-05-14 | 2009-05-14 | Special screw tap for machining titanium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101549422B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102712055B (en) * | 2010-01-13 | 2014-03-19 | Osg株式会社 | Thread forming tap with inside diameter finishing tooth |
| DE102011075770A1 (en) * | 2011-05-12 | 2012-11-15 | Hilti Aktiengesellschaft | Method for forming an internal thread and combination of a base body with a recess and a tap |
| WO2013132665A1 (en) * | 2012-03-09 | 2013-09-12 | オーエスジー株式会社 | Spiral tap |
| CN102744473A (en) * | 2012-07-03 | 2012-10-24 | 南京晨光集团有限责任公司 | Screw tap suitable for numerical control machining for titanium alloy |
| CN104439564A (en) * | 2013-09-25 | 2015-03-25 | 益壮企业有限公司 | Screw tap with replaceable blade |
| CN103990869B (en) * | 2014-06-12 | 2016-03-30 | 航天精工股份有限公司 | Big L/D ratio titanium alloy screw tap for tapping |
| WO2018076208A1 (en) * | 2016-10-26 | 2018-05-03 | 吴明恭 | Milling cutter structure having forward and reverse rotation direction |
| KR102291843B1 (en) | 2017-04-18 | 2021-08-23 | 오에스지 가부시키가이샤 | precursor tab |
| TWI671156B (en) * | 2018-06-22 | 2019-09-11 | 王志嘉 | Screw tap and method of using the same |
| CN114769749A (en) * | 2022-05-27 | 2022-07-22 | 天津鸿生科技有限公司 | Step tooth form durable screw tap |
| CN114769750A (en) * | 2022-05-27 | 2022-07-22 | 天津鸿生科技有限公司 | Spiral fluted tap for processing small-diameter large-pitch blind hole and using method |
-
2009
- 2009-05-14 CN CN2009100115358A patent/CN101549422B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101549422A (en) | 2009-10-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20140514 |