CN203448800U - Small-diameter spiral flute tap - Google Patents
Small-diameter spiral flute tap Download PDFInfo
- Publication number
- CN203448800U CN203448800U CN201320413024.0U CN201320413024U CN203448800U CN 203448800 U CN203448800 U CN 203448800U CN 201320413024 U CN201320413024 U CN 201320413024U CN 203448800 U CN203448800 U CN 203448800U
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- China
- Prior art keywords
- tap
- screw tap
- described screw
- spiral fluted
- operate portions
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Abstract
The utility model discloses a small-diameter spiral flute tap comprising a tap handle part and a tap working part. A transitional part is arranged between the tap handle part and the tap working part. The tap working part comprises thread cutting teeth and spiral chip grooves. The nominal diameter of the tap working part is 0.8-4mm. The front end of the tap working part is provided with a cutting tap. The small-diameter spiral flute tap is simple in structure, has a good service effect and fully meets the requirement for thread processing.
Description
Technical field
The utility model relates to screwing tool technical field, particularly relates to a kind of minor diameter spiral fluted tap.
Background technology
Spiral fluted tap is the most frequently used a kind of screwing tool, belongs to a kind of of screw tap, because its chip area is helical form, gains the name, and spiral fluted tap is divided into left-handed spiral fluted tap and right hand helix groove screw tap.When processing right-handed thread, during left-handed spiral fluted tap tapping, smear metal is arranged downwards, is suitable for through hole; During right hand helix groove tap tapping, smear metal is upwards discharged, and is suitable for blind hole.Existing spiral fluted tap major part is major diameter spiral fluted tap, can not fully meet screw thread processing request.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of minor diameter spiral fluted tap, have advantages of rational in infrastructure, result of use good, fully meets the demand of screw thread processing.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of minor diameter spiral fluted tap is provided, comprise: screw tap shank and screw tap operate portions, between described screw tap shank and screw tap operate portions, be provided with changeover portion, described screw tap operate portions is provided with screw chasing tooth and helical flute, the nominal diameter of described screw tap operate portions is 0.8 ~ 4 millimeter, and the front end of described screw tap operate portions has cutting cone.
In preferred embodiment of the utility model, the pitch of described screw chasing tooth is 0.2 ~ 0.7 millimeter.
In preferred embodiment of the utility model, the length of described cutting cone is the pitch of 1.5 ~ 3 times.
In preferred embodiment of the utility model, described helical flute is left-handed or right hand helix groove, and its helical angle is 10 ° ~ 53 °, and the groove number of described helical flute is 2 or 3.
In preferred embodiment of the utility model, on the end of described screw tap shank, be provided with square toes.
In preferred embodiment of the utility model, the external diameter of described screw tap shank is greater than the nominal diameter of screw tap operate portions, and the external diameter scope of described screw tap shank is 3 ~ 5 millimeters.
In preferred embodiment of the utility model, on the outer surface of described screw chasing tooth, be provided with hard wear-resistant coating.
In preferred embodiment of the utility model, the surface roughness of described screw chasing tooth is Rz 3.2, and the surface roughness of described screw tap shank is Ra 0.8.
In preferred embodiment of the utility model, described spiral fluted tap adopts PM HSS to make.
The beneficial effects of the utility model are: the utility model minor diameter spiral fluted tap, have advantages of rational in infrastructure, result of use good, fully meets the demand of screw thread processing.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also according to these accompanying drawings, obtain other accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model minor diameter spiral fluted tap one preferred embodiment;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
In accompanying drawing, the mark of each parts is as follows: 1, screw tap shank, 2, screw tap operate portions, 21, screw chasing tooth, 22, helical flute, 23, cutting cone, 3, changeover portion, 4, square toes.
The specific embodiment
Below the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1 and Fig. 2, the utility model embodiment comprises:
A kind of minor diameter spiral fluted tap, comprise: screw tap shank 1 and screw tap operate portions 2, between described screw tap shank 1 and screw tap operate portions 2, be provided with changeover portion 3, described screw tap operate portions 2 is provided with screw chasing tooth 21 and helical flute 22, the nominal diameter d of described screw tap operate portions 2 is 0.8 ~ 4 millimeter, the front end of described screw tap operate portions 2 has cutting cone 23, and cutting cone 23 is undertaken cutwork, and the back segment of screw tap operate portions 2 plays screw thread calibration function.
The pitch of described screw chasing tooth 21 is 0.2 ~ 0.7 millimeter.
The length of described cutting cone 23 is the pitch of 1.5 ~ 3 times.
Described helical flute 22 is left-handed or right hand helix groove, and its helical angle is 10 ° ~ 53 °, and the groove number of described helical flute 22 is 2 or 3.
On the end of described screw tap shank 1, be provided with square toes 4.
The external diameter of described screw tap shank 1 is greater than the nominal diameter d of screw tap operate portions 2, and the external diameter scope of described screw tap shank 1 is 3 ~ 5 millimeters.
On the outer surface of described screw chasing tooth 21, be provided with hard wear-resistant coating, as TiN coating, TiCN coating, TiAlN coating etc., except this can also carry out oxidation processes, strengthened the surface of screw chasing tooth 21, improved case hardness and anti-wear performance.
The surface roughness of described screw chasing tooth 21 is Rz 3.2, and the surface roughness of described screw tap shank 1 is Ra 0.8.
Described spiral fluted tap adopts PM HSS to make.
The utility model minor diameter spiral fluted tap, have advantages of rational in infrastructure, result of use good, fully meets the demand of screw thread processing.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. a minor diameter spiral fluted tap, it is characterized in that, comprise: screw tap shank and screw tap operate portions, between described screw tap shank and screw tap operate portions, be provided with changeover portion, described screw tap operate portions is provided with screw chasing tooth and helical flute, the nominal diameter of described screw tap operate portions is 0.8 ~ 4 millimeter, and the front end of described screw tap operate portions has cutting cone.
2. minor diameter spiral fluted tap according to claim 1, is characterized in that, the pitch of described screw chasing tooth is 0.2 ~ 0.7 millimeter.
3. minor diameter spiral fluted tap according to claim 2, is characterized in that, the length of described cutting cone is the pitch of 1.5 ~ 3 times.
4. minor diameter spiral fluted tap according to claim 1, is characterized in that, described helical flute is left-handed or right hand helix groove, and its helical angle is 10 ° ~ 53 °, and the groove number of described helical flute is 2 or 3.
5. minor diameter spiral fluted tap according to claim 1, is characterized in that, on the end of described screw tap shank, is provided with square toes.
6. minor diameter spiral fluted tap according to claim 1, is characterized in that, the external diameter of described screw tap shank is greater than the nominal diameter of screw tap operate portions, and the external diameter scope of described screw tap shank is 3 ~ 5 millimeters.
7. minor diameter spiral fluted tap according to claim 1, is characterized in that, on the outer surface of described screw chasing tooth, is provided with hard wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413024.0U CN203448800U (en) | 2013-07-12 | 2013-07-12 | Small-diameter spiral flute tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413024.0U CN203448800U (en) | 2013-07-12 | 2013-07-12 | Small-diameter spiral flute tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203448800U true CN203448800U (en) | 2014-02-26 |
Family
ID=50128704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320413024.0U Expired - Fee Related CN203448800U (en) | 2013-07-12 | 2013-07-12 | Small-diameter spiral flute tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203448800U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475606A (en) * | 2016-12-23 | 2017-03-08 | 平湖市山特螺纹工具有限公司 | A kind of rustless steel screw tap |
| CN107999904A (en) * | 2017-12-13 | 2018-05-08 | 贵州新安航空机械有限责任公司 | A kind of small-bore trapezoidal thread thread forming tap |
-
2013
- 2013-07-12 CN CN201320413024.0U patent/CN203448800U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475606A (en) * | 2016-12-23 | 2017-03-08 | 平湖市山特螺纹工具有限公司 | A kind of rustless steel screw tap |
| CN107999904A (en) * | 2017-12-13 | 2018-05-08 | 贵州新安航空机械有限责任公司 | A kind of small-bore trapezoidal thread thread forming tap |
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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: 20140226 Termination date: 20190712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |