CN202639561U - Open type through hole thread tapping screw tap - Google Patents
Open type through hole thread tapping screw tap Download PDFInfo
- Publication number
- CN202639561U CN202639561U CN 201220291681 CN201220291681U CN202639561U CN 202639561 U CN202639561 U CN 202639561U CN 201220291681 CN201220291681 CN 201220291681 CN 201220291681 U CN201220291681 U CN 201220291681U CN 202639561 U CN202639561 U CN 202639561U
- Authority
- CN
- China
- Prior art keywords
- screw tap
- open type
- hole
- guide post
- tapping screw
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an open type through hole thread tapping screw tap, which comprises a tail handle and a threaded part for cutting, wherein one end of the threaded part is provided with a guide rod; and the diameter of the guide rod is the same as the aperture of a workpiece through hole to be machined. According to the open type through hole thread tapping screw tap, the defects of inaccuracy in tapping positioning and non-uniform thread forming of an open type through hole of a workpiece are overcome.
Description
Technical field
The utility model relates to the thread-cutting tool field, more specifically, relates to a kind of screw tap.
Background technology
Screw tap be processing various in, the cutter of small size internal thread, it is simple in structure, and is easy to use, both manually actuated, also can work at lathe, uses aborning very extensively.Traditional screw tap structure is referring to Fig. 1, and its basic structure is an axially grooved threaded portion, and the threaded portion can be divided into cutting cone part and calibrated section.Cutting cone grinds cone angle, in order to cut gradually whole surpluses; Calibrated section has complete profile of tooth, plays smoothing, calibration and guide effect.Threaded portion 3 one ends link to each other in caudal peduncle 2, and caudal peduncle 2 is connected with tapered bore of machine tool spindle with the standard taper shank by chuck.This structure is located inaccurately in the tapping process to the open type material, and thread forming is inhomogeneous, and the screw tap frangibility, therefore is necessary it is changed.
Summary of the invention
In order to overcome deficiency of the prior art, the utility model provides a kind of screw tap, and it is inaccurate for location in the open type material tapping process to utilize this screw tap can effectively solve the prior art plug tap, the drawback that thread forming is inhomogeneous.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: a kind of open type through hole whorl screw tap for tapping, the threaded portion that comprises caudal peduncle and cutting usefulness, end in described threaded portion is provided with guide post, and the diameter of described guide post is identical with the workpiece through-hole aperture that needs processing.
In the technique scheme, be provided with chamfering at an end of described guide post, be convenient to guide post and insert in the workpiece through-hole.
Of the present utility model have a following beneficial effect: the end at original screw tap adds guide post, and the tapping location that has solved workpiece openings formula through hole is inaccurate, the drawback that thread forming is inhomogeneous.
Description of drawings
Fig. 1 is the structural representation of traditional screw tap.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the partial enlarged drawing at the utility model A place.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment the utility model is described in further detail: referring to Fig. 2, a kind of open type through hole whorl screw tap for tapping comprises caudal peduncle 2 and the threaded portion 3 of cutting usefulness, and the end in described threaded portion 3 is provided with guide post 1.
Described guide post 1 is cylindrical structural, and its aperture is identical with the hole size of the workpiece that needs tapping, is provided with chamfering 10 at an end of described guide post 1, in the through hole of the insertion workpiece that the guide post 1 of screw tap can be more prone to when being convenient to tapping.During use, screw tap connects with tapered bore of machine tool spindle by instrument afterbody chuck and standard taper shank.During tapping, guide post 1 at first enters in the through hole of workpiece, because the diameter of guide post 1 is identical with the through-hole aperture size of workpiece, cut along the path position of guide post 1 process in through hole all the time the threaded portion 3 that has guaranteed screw tap, cutting position just can not produce skew like this, it is accurate to have guaranteed that screw tap is located in tapping process, and thread forming is more even.
Claims (2)
1. open type through hole whorl screw tap for tapping, the threaded portion (3) that comprises caudal peduncle (2) and cutting usefulness, it is characterized in that: the end in described threaded portion (3) is provided with guide post (1), and the diameter of described guide post (1) is identical with the workpiece through-hole aperture that needs processing.
2. a kind of open type through hole whorl screw tap for tapping according to claim 1, it is characterized in that: the end at described guide post (1) is provided with chamfering (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291681 CN202639561U (en) | 2012-06-20 | 2012-06-20 | Open type through hole thread tapping screw tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291681 CN202639561U (en) | 2012-06-20 | 2012-06-20 | Open type through hole thread tapping screw tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202639561U true CN202639561U (en) | 2013-01-02 |
Family
ID=47408738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220291681 Expired - Fee Related CN202639561U (en) | 2012-06-20 | 2012-06-20 | Open type through hole thread tapping screw tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202639561U (en) |
-
2012
- 2012-06-20 CN CN 201220291681 patent/CN202639561U/en not_active Expired - Fee Related
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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: 20130102 Termination date: 20210620 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |