CN109420804A - A kind of thread-cutting tool - Google Patents
A kind of thread-cutting tool Download PDFInfo
- Publication number
- CN109420804A CN109420804A CN201710732031.XA CN201710732031A CN109420804A CN 109420804 A CN109420804 A CN 109420804A CN 201710732031 A CN201710732031 A CN 201710732031A CN 109420804 A CN109420804 A CN 109420804A
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- threading tool
- sword
- cutting
- offset
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
In order to improve a kind of thread-cutting tool, the cutting tool has multiple cutting edges (3-1) to (3-n) arranged side by side (n is 5 in figure), and screw thread successively is cut using the multiple cutting edge, at least one cutting edge in the cutting edge of cutting tool other than finishing sword (3-5) is deviated towards the direction (can also be towards direction of feed) opposite with the direction of feed of cutting tool.
Description
Technical field
The present invention relates to a kind of threading tools of entitled chaser, more particularly it relates to following cutting tool
: its by successively carried out using the multiple cutting edges being included in single cutter and including finishing sword tapping come
Form screw thread.
Background technique
The example of the existing threading tool including multiple cutting edges includes the tapping disclosed in for example following PTL1
Cutter.
In the tapping cutter described in PTL1, in tapping roughing cutter head and tapping finishing cutter head (in the present invention
In be known as threading tool) in be provided with multiple cutting edges, these cutting edges along cutter axially be abreast arranged at an equal pitch
(referring to Fig. 7 of PTL1).Spacing between multiple cutting edges be set equal to screw thread to be formed pitch.It is each to cut
It is in monosymmetric shape that sword, which is cut, relative to respective center line, thus in feeding side, the share of the front side of center line
(share) share (cutting share) of the rear side of (cutting share) and center line is equal to each other (referring to PTL1's
Figure.
Here cutter axially refers to the direction that cutter and the workpiece of wanted tapping move relative to each other when executing tapping.
In threading tool disclosed in PTL1, the spacing between multiple cutting edges is set equal to institute's spiral shell to be formed
The pitch of line.In addition, the shape of each cutting edge is both with respect to central symmetry.Therefore, the whole chips all courts generated by cutting edge
The center of cutter is mobile.
Therefore, especially when forming internal screw thread on the hole surface of workpiece, the expulsion efficiency of chip may be problematic.When right
Such as when the progress tapping of the workpiece made of special material such as oil well pipe, generate the chip for being difficult to cut off.If the structure of chip
So that the center of chip towards cutter continuously moves, then the chip moved is easier to contact with the hole surface of workpiece, this contact
The quality for being threaded surface is caused to reduce.
To solve the above-mentioned problems, it is an object of the invention to be oriented to the movement of chip, especially along cutter shaft
To guidance chip.
To solve the above-mentioned problems, the purpose of the present invention is improve threading tool, the threading tool include it is multiple side by side
The cutting edge of setting and successively using the multiple cutting edge carry out tapping to form screw thread.The cutting edge of the threading tool
In at least one cutting edge other than finishing sword in feed direction (towards the direction for biting workpiece of cutter) or
Backward feed direction deviates on (direction opposite with the direction of feed).The direction of feed is the side for feeding cutter to workpiece
To.
In this threading tool, it is preferred that other than the finishing sword, or in addition to most latter two cutting edge
Except (the finishing sword and the previous cutting edge of the finishing sword), whole cutting edges deviate in the same direction.Respectively
The direction of a cutting edge offset can be the direction of feed, in those cases it may however be preferred to, each cutting edge is in the backward feed direction
Upper offset.
So that the multiple cutting edge is deviated different offset or makes at least one cutting edge in the cutting edge
Offset is different from the offset of other cutting edges, is in this way also effective.
In the case where making at least one cutting edge offset other than the finishing sword or most latter two cutting edge,
It is expected that deviating forward cutting edge on offset direction.For example, making cutting edge in the backward feed side up towards institute
In the case that side where stating finishing sword deviates, if making to obtain close to the cutting edge offset of the finishing sword
Obtain advantageous result.
In threading tool of the invention, at least one cutting edge other than finishing sword is inclined in particular directions
It moves, and chip caused by the cutting edge using offset is moved on the direction opposite with offset direction.
Here, the moving direction of chip is cutter axial direction.Therefore, when forming internal screw thread on the hole surface of workpiece, chip
It is not easy the hole surface of contact workpiece, to be threaded the quality deterioration on surface caused by preventing due to this contact.
Detailed description of the invention
Fig. 1 is the front view of threading tool according to a first embodiment of the present invention.
Specific embodiment
The embodiment of threading tool of the invention is described below with reference to Fig. 1.
Trapezoidal spiral shell shown in the double dot dash line that threading tool according to first embodiment 1 shown in FIG. 1 is used to process as in
Line (pipe for oil well use pipe fitting taper thread) 11, and there is the first cutting edge 3-1 to the 5th cutting edge 3-5.First cutting edge
3-1 is the cutting edge for biting workpiece W first.
Claims (4)
1. a kind of threading tool including multiple cutting edges arranged side by side, the threading tool successively use the multiple cutting
Sword carries out tapping to form screw thread, wherein at least one in the cutting edge of the threading tool other than finishing sword is cut
Sword is cut to offset up in the direction of feed of the threading tool or in the side opposite with the direction of feed of the threading tool.
2. the threading tool according to claim 1, wherein other than the finishing sword, or in addition to the essence
It processes except sword and the previous cutting edge of the finishing sword, whole cutting edges deviate in the same direction.
3. according to claim 1 or threading tool described in 2, wherein the cutting edge to be deviated is in the same direction partially
It moves, and is offset up in the side opposite with the direction of feed of the threading tool.
4. according to claim 1 to threading tool described in any one of 3, wherein some in the multiple cutting edge
Cutting edge deviates in particular directions, and at least one of the cutting edge deviated
The offset of cutting edge is different from the offset of other cutting edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710732031.XA CN109420804A (en) | 2017-08-23 | 2017-08-23 | A kind of thread-cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710732031.XA CN109420804A (en) | 2017-08-23 | 2017-08-23 | A kind of thread-cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109420804A true CN109420804A (en) | 2019-03-05 |
Family
ID=65499310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710732031.XA Pending CN109420804A (en) | 2017-08-23 | 2017-08-23 | A kind of thread-cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109420804A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333875A (en) * | 2021-06-28 | 2021-09-03 | 湘潭大学 | Thread chasing tool |
-
2017
- 2017-08-23 CN CN201710732031.XA patent/CN109420804A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333875A (en) * | 2021-06-28 | 2021-09-03 | 湘潭大学 | Thread chasing tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190305 |