CN105478930A - Screw tap for metal part machining - Google Patents
Screw tap for metal part machining Download PDFInfo
- Publication number
- CN105478930A CN105478930A CN201610024464.5A CN201610024464A CN105478930A CN 105478930 A CN105478930 A CN 105478930A CN 201610024464 A CN201610024464 A CN 201610024464A CN 105478930 A CN105478930 A CN 105478930A
- Authority
- CN
- China
- Prior art keywords
- tapping
- screw tap
- groove
- sword
- angle
- 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
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
- B23G5/06—Taps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
- B23G5/06—Taps
- B23G5/062—Taps with a guiding means part
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A screw tap for metal part machining comprises a tapping part and a screw tap shank part. A conical head (1) for guiding tapping is arranged at the top end of the tapping part. The tapping part comprises N tapping teeth (2) arranged in the axial direction. Tapping edges are arranged on the sides, in the same direction, of the tapping teeth (2). The front tapping angle (a) of the tapping edges is 18-20 degrees, and the rear tapping angle (b) of the tapping edges is 10-12 degrees. A tapping groove (21) is formed between every two adjacent tapping teeth (2), and N is a natural number from 3 to 5. The screw tap has the advantages that the front tapping angle is designed to be 18-20 degrees, the rear tapping angle is designed to be 10-12 degrees, the volume of the tapping grooves can be increased through the design, cuttings not likely to be curled or broken can be temporally stored in the tapping grooves, and the situation that the screw tap is broken or cutter teeth are subjected to tipping due to cutting blocking is avoided; and in addition, the conical head of the screw tap is provided with a buffer groove after part of tapping teeth are milled away, and due to the fact that the stress area of the buffer groove is smaller than that of the tapping grooves, stress of the screw tap is gradually increased, and tapping operation is more stable.
Description
Technical field
The present invention relates to cutting tool technical field, especially a kind of screw tap for metalwork processing.
Background technology
Existing a kind of patent No. is that CN201220502048.9 name is called that the Chinese utility model patent of " a kind of screw tap " discloses a kind of screw tap, comprises screw tap shank and screw tap blade part, it is characterized in that: described screw tap is provided with the through hole being parallel to screw tap axis.Through hole set by this utility model is used for cooling fluid turnover, during work, cooling fluid acts on processing component by through hole, make to add man-hour screw tap and institute's processing component between the heat that produces because of friction be able to timely reduction, reduce the frictional resistance of screw tap and institute's processing component. increase the service life of screw tap, reduce the damage of processing component, thus greatly increase work efficiency, reduce enterprise's production cost.Described screw tap structure is simple, one-body moldedly can be mass.But this screw tap is carrying out stainlessly adding man-hour, and easily work hardening occurs, blade part easily damages, and easily fractures between blade part and shank, and service life is shorter, and result of use is undesirable, and therefore the structure of this screw tap also needs further improvement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of tapping effect good, not frangibility and long service life the screw tap for metalwork processing.
The present invention solves the problems of the technologies described above adopted technical scheme: this is used for the screw tap of metalwork processing, include tapping portion and screw tap shank, it is characterized in that: the top in described tapping portion is the taper head guiding tapping, described tapping portion includes the N number of tapping tooth axially arranged, each tapping tooth side is in the same way tapping sword, the tapping anterior angle of described tapping sword is 18 ° ~ 20 °, the tapping relief angle of described tapping sword is 10 ° ~ 12 °, be provided with tapping groove between adjacent two tapping teeth, described N is the natural number of 3 ~ 5.
As improvement, described tapping tooth can be preferably three, and described tapping groove also can be preferably three, the arc surface that the bottom of described tapping groove is left for convenience of Integrated Chip.
Further improvement, the sideline, bottom of described tapping groove radial section can be preferably the involute structure that Integrated Chip can come off smoothly.
As improvement, the drift angle of described taper head axial cross section can be preferably 60 ° ~ 70 °.
Further improvement, described taper head is positioned at tapping groove corresponding position and is provided with the dashpot milling part tapping tooth and formed, the tapping sword be connected with described dashpot and the tapping sword be connected with tapping groove is smooth is connected.
Further improvement, the sideline, bottom of described dashpot radial section can preferably can come off smoothly in Integrated Chip involute.
As improvement, described screw tap can be preferably W
2mo
9cr
1vCo
8the metal screw tap that material is made, the surface of described metal screw tap can preferably be coated with the titanium layer that can extend life of tap.
As improvement, described screw tap shank preferably can facilitate the square, hexagon or the rhombus handle bar that fix with lathe.
Compared with prior art, the invention has the advantages that: the tapping anterior angle of this screw tap is designed to 18 ° ~ 20 °, the tapping relief angle of tapping sword is 10 ° ~ 12 °, such design can make tapping groove volume increase, not easily curling and chip that is that fracture is kept in tapping groove, is unlikely to screw tap to be fractureed or cutter tooth tipping because of chip blocking; Further, the taper head of this screw tap mills part tapping tooth and is provided with dashpot, and because dashpot is less than the lifting surface area of tapping groove, thus the stressed of screw tap is increased gradually, screwing operation is also more steady; This screw tap is also had to adopt containing the more W of Co element
2mo
9cr
1vCo
8the high-speed steel of material, its hardness ratio regular tap is high, thus effectively extends the service life of screw tap, also improves screw thread quality; And titanium is coated with on screw tap surface, the frictional force between screw tap surface and stainless steel material not only can be made to decline, and effectively can also suppress screw tap and stainless affinity interaction, effectively stop the bonding between stainless steel and screw tap, thus make thread surface more smooth; This screw tap is also had preferably to adopt 3 tapping grooves, compared with four tapping grooves, the size of the cross section of this screw tap increases, make the cutting moment of torque less, thus the intensity of screw tap is effectively increased, and the tapping torque of the screw tap of 3 tapping grooves is less than the screw tap moment of torsion of four tapping grooves, and thus unit are cutting force also reduces thereupon, can effectively prevent screw tap from fractureing under the effect of tapping torque like this, also for increase tapping anterior angle and tapping relief angle create favourable condition.
Accompanying drawing explanation
Fig. 1 is the front projection figure of the embodiment of the present invention;
Fig. 2 is the profile along A-A line in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As depicted in figs. 1 and 2, the screw tap for metalwork processing of the present embodiment, include tapping portion and screw tap shank, the top in described tapping portion is the taper head 1 guiding tapping, and described tapping portion includes the N number of tapping tooth 2 axially arranged, and each tapping tooth 2 side is in the same way tapping sword, the tapping anterior angle a of described tapping sword is 18 ° ~ 20 °, the tapping relief angle b of described tapping sword is 10 ° ~ 12 °, and be provided with tapping groove 21 between adjacent two tapping teeth 2, described N is the natural number of 3 ~ 5.Described tapping tooth 2 is three, and described tapping groove 21 is also three, the arc surface that the bottom of described tapping groove 21 is left for convenience of Integrated Chip.The sideline, bottom of described tapping groove 21 radial section is the involute structure that Integrated Chip can come off smoothly.The drift angle c of described taper head 1 axial cross section is 60 ° ~ 70 °.Described taper head 1 is positioned at tapping groove 21 corresponding position and is provided with the dashpot 23 milling part tapping tooth and formed, the tapping sword be connected with described the dashpot 23 and tapping sword be connected with tapping groove 21 is smooth is connected.The sideline, bottom 22 of described dashpot 23 radial section can come off smoothly in Integrated Chip involute.Described screw tap is W
2mo
9cr
1vCo
8the metal screw tap that material is made, the surface of described metal screw tap is coated with the titanium layer that can extend life of tap.Square, hexagon or rhombus handle bar 3 that described screw tap shank fixes with lathe for convenience.
So-called tapping: after referring to punching, the internal perisporium in hole makes the process of internal thread tapping.
Claims (8)
1. the screw tap for metalwork processing, include tapping portion and screw tap shank, it is characterized in that: the top in described tapping portion is the taper head (1) guiding tapping, described tapping portion includes the N number of tapping tooth (2) axially arranged, each tapping tooth (2) side is in the same way tapping sword, tapping anterior angle (a) of described tapping sword is 18 ° ~ 20 °, tapping relief angle (b) of described tapping sword is 10 ° ~ 12 °, be provided with tapping groove (21) between adjacent two tapping teeth (2), described N is the natural number of 3 ~ 5.
2. screw tap according to claim 1, is characterized in that: described tapping tooth (2) is three, and described tapping groove (21) is also three, the arc surface that the bottom of described tapping groove (21) is left for convenience of Integrated Chip.
3. screw tap according to claim 2, is characterized in that: the sideline, bottom of described tapping groove (21) radial section is the involute structure that Integrated Chip can come off smoothly.
4., according to described screw tap arbitrary in claims 1 to 3, it is characterized in that: the drift angle (c) of described taper head (1) axial cross section is 60 ° ~ 70 °.
5. screw tap according to claim 4, it is characterized in that: described taper head (1) is positioned at tapping groove (21) corresponding position and is provided with the dashpot (23) milling part tapping tooth and formed, the tapping sword be connected with described dashpot (23) and the tapping sword be connected with tapping groove (21) is smooth is connected.
6. screw tap according to claim 5, is characterized in that: the sideline, bottom (22) of described dashpot (23) radial section can come off smoothly in Integrated Chip involute.
7., according to described screw tap arbitrary in claims 1 to 3, it is characterized in that: described screw tap is W
2mo
9cr
1vCo
8the metal screw tap that material is made, the surface of described metal screw tap is coated with the titanium layer that can extend life of tap.
8., according to described screw tap arbitrary in claims 1 to 3, it is characterized in that: square, hexagon or rhombus handle bar (3) that described screw tap shank fixes with lathe for convenience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024464.5A CN105478930A (en) | 2016-01-06 | 2016-01-06 | Screw tap for metal part machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024464.5A CN105478930A (en) | 2016-01-06 | 2016-01-06 | Screw tap for metal part machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105478930A true CN105478930A (en) | 2016-04-13 |
Family
ID=55666393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610024464.5A Pending CN105478930A (en) | 2016-01-06 | 2016-01-06 | Screw tap for metal part machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105478930A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050271486A1 (en) * | 2004-06-07 | 2005-12-08 | Henderer Willard E | Low torque tap |
| CN201253719Y (en) * | 2008-08-13 | 2009-06-10 | 吴秀峰 | Heavy cutting tap |
| CN202278273U (en) * | 2011-09-14 | 2012-06-20 | 中国航空工业第六一八研究所 | Screw tap for processing tough material threaded blind hole |
| CN202726217U (en) * | 2012-08-21 | 2013-02-13 | 常州常达刃具制造有限公司 | Machine screw tap |
| CN103990869A (en) * | 2014-06-12 | 2014-08-20 | 航天精工股份有限公司 | Large length-diameter-ratio screw tap for titanium alloy piece tapping |
| CN205496717U (en) * | 2016-01-06 | 2016-08-24 | 舟山市7412工厂 | A screw tap for metal processing part |
-
2016
- 2016-01-06 CN CN201610024464.5A patent/CN105478930A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050271486A1 (en) * | 2004-06-07 | 2005-12-08 | Henderer Willard E | Low torque tap |
| CN201253719Y (en) * | 2008-08-13 | 2009-06-10 | 吴秀峰 | Heavy cutting tap |
| CN202278273U (en) * | 2011-09-14 | 2012-06-20 | 中国航空工业第六一八研究所 | Screw tap for processing tough material threaded blind hole |
| CN202726217U (en) * | 2012-08-21 | 2013-02-13 | 常州常达刃具制造有限公司 | Machine screw tap |
| CN103990869A (en) * | 2014-06-12 | 2014-08-20 | 航天精工股份有限公司 | Large length-diameter-ratio screw tap for titanium alloy piece tapping |
| CN205496717U (en) * | 2016-01-06 | 2016-08-24 | 舟山市7412工厂 | A screw tap for metal processing part |
Non-Patent Citations (2)
| Title |
|---|
| 何国寿: "螺母丝锥最佳前角的选择", 《工具技术》 * |
| 王文高: "加工不锈钢工件小孔螺纹的挤压丝锥", 《机械制造》 * |
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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: 20160413 |
|
| RJ01 | Rejection of invention patent application after publication |