CN202367299U - Spiral tap - Google Patents

Spiral tap Download PDF

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Publication number
CN202367299U
CN202367299U CN2011205626865U CN201120562686U CN202367299U CN 202367299 U CN202367299 U CN 202367299U CN 2011205626865 U CN2011205626865 U CN 2011205626865U CN 201120562686 U CN201120562686 U CN 201120562686U CN 202367299 U CN202367299 U CN 202367299U
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CN
China
Prior art keywords
spiral
tooth
cutting
screw tap
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.)
Active
Application number
CN2011205626865U
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Chinese (zh)
Inventor
钟国斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dabao (dongguan) Molding & Cutting Tool Co Ltd
Original Assignee
Dabao (dongguan) Molding & Cutting Tool Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dabao (dongguan) Molding & Cutting Tool Co Ltd filed Critical Dabao (dongguan) Molding & Cutting Tool Co Ltd
Priority to CN2011205626865U priority Critical patent/CN202367299U/en
Application granted granted Critical
Publication of CN202367299U publication Critical patent/CN202367299U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a spiral tap, which comprises a body and a center which is arranged at the front end of the body, wherein the body sequentially comprises a tooth part, a neck part and a handle part, wherein the tooth part is arranged at the rear end of the center and is provided with two or more than two spiral teeth, and a spiral groove is formed between two adjacent spiral teeth; and a front cutting angle alpha of the spiral teeth is 6 to 8 degrees, and a rear cutting angle beta of the spiral teeth is 4 to 6 degrees. Compared with the prior art, the utility model has the advantages that a phenomenon that a cutting angle of the traditional spiral tap is not sharp enough so as to cause low smoothness of the machined inner threaded surface can be avoided; a condition that chips are difficult to break and are discharged in an unsmooth mode due to the unstable rear cutting angle is prevented; meanwhile, the unstable quality of different batches of products due to different operators is avoided, and the spiral tap has the characteristics of high cutting efficiency, high cutting quality, long service life and stable product quality.

Description

A kind of spiral screw tap
Technical field
The utility model relates to a kind of cutting element, particularly relates to a kind of spiral screw tap.
Background technology
The spiral screw tap is a kind of cutter of machining internal thread, is particularly useful for blind hole is cut the tapping operation of material.The groove of spiral screw tap of the prior art becomes screw type, the spiral screw tap when tapping, with its spiral fluted rising turning effort, can be easily outside the smear metal tap, in order to avoid smear metal is residual or plug what groove in, the spiral shell awl fractures, blade bursts apart thereby cause.Because the spiral screw tap can prolong the service life of screw tap, can also cut the screw thread of full accuracy simultaneously, therefore, receive people's extensive use.
In the prior art, the cutting anterior angle of spiral screw tap is 3 °~5 °, and back angle is not done any requirement, is processed with the bottom land gradient; Because the cutting anterior angle is sharp inadequately, thereby make that the interior threaded surface fineness that processes is not enough; Because the instability of back angle, thus make smear metal not frangible can't smooth and easyly discharge, and then shortened the service life of spiral screw tap; Simultaneously, because the spiral screw tap of said structure is processed with the bottom land gradient, therefore need the operating personnel to set grinding wheel width; Thereby the size that could guarantee the bottom land that it processes is in working range; Like this, not only increase the amount of labour, improved use cost; But also, be prone to cause the unsettled phenomenon of different batches product quality because of operating personnel's difference.
Therefore, for addressing the above problem, needing badly provides a kind of cutting operation that can make easier, and smear metal is frangible and smooth and easy discharge more, longer service life, the spiral screw tap that the interior threaded surface that processes simultaneously is brighter and cleaner.
The utility model content
The purpose of the utility model is to avoid weak point of the prior art and provides a kind of cutting operation that can make easier, and smear metal is frangible and smooth and easy discharge more, longer service life, the spiral screw tap that the interior threaded surface that processes simultaneously is brighter and cleaner.
The purpose of the utility model realizes through following technical scheme:
A kind of spiral screw tap is provided, includes body and be arranged at the top of said body front end, wherein, said body includes tooth portion, neck and shank successively, and said tooth portion is arranged at said top rear end; Said tooth portion is provided with two or more spiral tooth, is provided with helicla flute between adjacent two spiral teeth; The cutting anterior angle α of said spiral tooth is 6 °~8 °, and its back angle β is 4 °~6 °.
Wherein, said cutting anterior angle α is 7 °.
Wherein, said back angle β is 5 °.
Wherein, said spiral fluted bottom land gradient is 0 °.
Wherein, the said spiral tooth spiral tooth that is dextrorotation.
Wherein, said spiral tooth is provided with three.
The beneficial effect of the utility model:
A kind of spiral screw tap includes body and is arranged at the top of said body front end, and wherein, said body includes tooth portion, neck and shank successively, and said tooth portion is arranged at said top rear end; Said tooth portion is provided with two or more spiral tooth, is provided with helicla flute between adjacent two spiral teeth; The cutting anterior angle α of said spiral tooth is 6 °~8 °, and its back angle β is 4 °~6 °.Compared with prior art, the utility model can avoid traditional spiral screw tap because of cutting angle is sharp inadequately, and the not enough phenomenon of inner threaded surface fineness that processes is produced; And prevent that back angle is unstable and make smear metal not frangible can't smooth and easyly discharge; Also avoided simultaneously through the improvement of the utility model, having promoted the fineness on spiral screw tap machining internal thread surface because of the different institutes of operating personnel cause the different batches product quality unstable; Smear metal is frangible and smooth and easy discharge more; Strengthened service life, and can make process automation, favourable maintenance product with stable quality through computer control; And reduce process time, increase work efficiency, also save cost.Have that stock-removing efficiency height, cutting quality are good, the characteristics of long service life, product with stable quality.
Description of drawings
Utilize accompanying drawing that utility model is described further; But the embodiment in the accompanying drawing does not constitute any restriction to the utility model; For those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to following accompanying drawing.
Fig. 1 is the structural representation of a kind of spiral screw tap of the utility model.
Fig. 2 is the structure for amplifying sketch map of ridge at the A place of Fig. 1.
In Fig. 1 and Fig. 2, comprise:
1---top,
2---tooth portion, 21---helicla flute, 22---spiral tooth,
3---neck,
4---shank,
α---cutting anterior angle,
β---back angle.
The specific embodiment
In conjunction with following examples the utility model is further described:
Embodiment 1
One of specific embodiment of a kind of spiral screw tap of the utility model; As depicted in figs. 1 and 2, include body and be arranged at the top 1 of said body front end, wherein; Said body includes tooth portion 2, neck 3 and shank 4 successively, and said tooth portion 2 is arranged at said top 1 rear end; Said tooth portion 2 is provided with two or more spiral tooth 22, is provided with helicla flute 21 between adjacent two spiral teeth 22; The cutting anterior angle α of said spiral tooth 22 is 6 °~8 °, and its back angle β is 4 °~6 °.
Compared with prior art, the utility model can avoid traditional spiral screw tap because of cutting angle is sharp inadequately, and the not enough phenomenon of inner threaded surface fineness that processes is produced; And prevent that back angle is unstable and make smear metal not frangible can't smooth and easyly discharge; Also avoided simultaneously through the improvement of the utility model, having promoted the fineness on spiral screw tap machining internal thread surface because of the different institutes of operating personnel cause the different batches product quality unstable; Smear metal is frangible and smooth and easy discharge more; Strengthened service life, and can make process automation, favourable maintenance product with stable quality through computer control; And reduce process time, increase work efficiency, also save cost.Have that stock-removing efficiency height, cutting quality are good, the characteristics of long service life, product with stable quality.
Concrete, said cutting anterior angle α is 7 °.
Concrete, said back angle β is 5 °.
Concrete, the bottom land gradient of said helicla flute 21 is 0 °.
Concrete, said spiral tooth 22 is the spiral tooth 22 of dextrorotation.See the dextrorotation rotation direction from shank 4 side-looking angles.
Concrete, said spiral tooth 22 is provided with three.
Embodiment 2
Two of the specific embodiment of a kind of spiral screw tap of the utility model, the main technical schemes of present embodiment is identical with embodiment 1, and unaccounted characteristic adopts the explanation among the embodiment 1 in the present embodiment, no longer gives unnecessary details at this.The difference of present embodiment and embodiment 1 is: said cutting anterior angle α is 8 °; Said back angle β is 4 °.Have that stock-removing efficiency is higher, cutting quality is better, longer service life, characteristics that product quality is more stable.
Should be noted that at last; Above embodiment is only in order to explain the technical scheme of the utility model; But not to the restriction of the utility model protection domain, although with reference to preferred embodiment the utility model has been done explanation at length, those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of the utility model, and not break away from the essence and the scope of the utility model technical scheme.

Claims (6)

1. a spiral screw tap includes body and is arranged at the top of said body front end, and it is characterized in that: said body includes tooth portion, neck and shank successively, and said tooth portion is arranged at said top rear end; Said tooth portion is provided with two or more spiral tooth, is provided with helicla flute between adjacent two spiral teeth; The cutting anterior angle α of said spiral tooth is 6 °~8 °, and its back angle β is 4 °~6 °.
2. a kind of spiral screw tap according to claim 1 is characterized in that: said cutting anterior angle α is 7 °.
3. a kind of spiral screw tap according to claim 1 is characterized in that: said back angle β is 5 °.
4. according to claim 1 or 2 or 3 described a kind of spiral screw taps, it is characterized in that: said spiral fluted bottom land gradient is 0 °.
5. a kind of spiral screw tap according to claim 4 is characterized in that: the spiral tooth that said spiral tooth is dextrorotation.
6. a kind of spiral screw tap according to claim 5 is characterized in that: said spiral tooth is provided with three.
CN2011205626865U 2011-12-29 2011-12-29 Spiral tap Active CN202367299U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205626865U CN202367299U (en) 2011-12-29 2011-12-29 Spiral tap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205626865U CN202367299U (en) 2011-12-29 2011-12-29 Spiral tap

Publications (1)

Publication Number Publication Date
CN202367299U true CN202367299U (en) 2012-08-08

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ID=46591023

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011205626865U Active CN202367299U (en) 2011-12-29 2011-12-29 Spiral tap

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Country Link
CN (1) CN202367299U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102990171A (en) * 2012-11-12 2013-03-27 大连经济技术开发区伊达工具有限公司 PCD (Poly Crystal Diamond) thread drilling and milling cutter
CN107052478A (en) * 2017-01-22 2017-08-18 上海应用技术大学 A kind of thin-wall pipe internal thread machining cutter
TWI635921B (en) * 2015-12-02 2018-09-21 日商Osg股份有限公司 Conical thread tapping for pipe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102990171A (en) * 2012-11-12 2013-03-27 大连经济技术开发区伊达工具有限公司 PCD (Poly Crystal Diamond) thread drilling and milling cutter
CN102990171B (en) * 2012-11-12 2015-09-23 大连经济技术开发区伊达工具有限公司 A kind of PCD threaded bore milling cutter
TWI635921B (en) * 2015-12-02 2018-09-21 日商Osg股份有限公司 Conical thread tapping for pipe
US10562118B2 (en) 2015-12-02 2020-02-18 Osg Corporation Tapered pipe thread-machining spiral tap
CN107052478A (en) * 2017-01-22 2017-08-18 上海应用技术大学 A kind of thin-wall pipe internal thread machining cutter
CN107052478B (en) * 2017-01-22 2020-04-07 上海应用技术大学 Thin-wall pipe fitting internal thread machining cutter

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