CN102145418A - Extruding tap for thin wall - Google Patents
Extruding tap for thin wall Download PDFInfo
- Publication number
- CN102145418A CN102145418A CN2011100220811A CN201110022081A CN102145418A CN 102145418 A CN102145418 A CN 102145418A CN 2011100220811 A CN2011100220811 A CN 2011100220811A CN 201110022081 A CN201110022081 A CN 201110022081A CN 102145418 A CN102145418 A CN 102145418A
- Authority
- CN
- China
- Prior art keywords
- thread
- tap
- thin
- wall part
- 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.)
- Pending
Links
Images
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
- B23G2210/00—Details of threads produced
- B23G2210/04—Internal threads
-
- 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
- B23G2210/00—Details of threads produced
- B23G2210/21—Threads in nuts
-
- 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
- B23G2210/00—Details of threads produced
- B23G2210/24—Threads having a variable pitch
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Dowels (AREA)
- Forging (AREA)
Abstract
The invention provides an extruding tap for a thin wall which conducts tapping on a thin wall through ensuring a high tightening torque. The extruding tap for a thin wall conducts tapping on the thin wall having the same plate thickness as a tap pitch (P). In a tap threaded tooth shape, when the height of a thread original triangle is H, the cutting height of the threaded tooth top is set to H/8 as close as possible, and the cutting height of the threaded tooth bottom exceeds H/4, and the thread screwing rate (H2) is 80-85%. Based on the tap pitch (P), the start point of a cambered surface (r2) of a circle inscribing the two sides of the threaded tooth bottom inclines from the middle of the tap (H/2) by a regulated size (h), and the front end of the tap diameter is reduced.
Description
Technical field
The present invention relates to a kind ofly can guarantee that high screw-down torque comes thin-wall part is carried out the thin-wall part thread forming tap of tapping.
Background technology
Well-knownly be, surpass the thread forming tap that 85% common screw thread screws rate (%), for example the thin-wall part with screw tap pitch (P) same degree thickness of slab is carried out tapping (tapping processing), then can not obtain enough screw-down torques if utilize to have.
Its reason is, for example above-mentioned thin-wall part carried out towards edge processing back, utilizing and have the thread forming tap that above-mentioned screw thread screws rate (%) and carry out under the situation of tapping, because of towards edge external diameter (cardinal extremity and front end both sides) expansion and towards the extension of edge height etc., the wall of negative thread (bottom outlet) is become inadequately, can not obtain enough protuberances.
Therefore, not only can not increase screw-down torque, and shown in Fig. 5 B, it is big that seam portion 101 (recess) on the thread crest of negative thread 100 becomes, produce " burr " or " overlap " at its front end, and, cause product quality to reduce because of pin thread enters generation in the seam portion 101 (recess) " screw floats " etc.
Yet, angle consideration from utilizing lightweight to save resource and reduce cost in recent years, for example be installed on the casing (shell) of the auto navigation on the fascia etc., to the increase in demand of the casing that constitutes by above-mentioned thin-wall part, and aspect the installation strength of this casing also demanding screw-down torque.
Summary of the invention
In view of the above problems, the object of the present invention is to provide and a kind ofly can guarantee that high screw-down torque comes thin-wall part is carried out the thin-wall part thread forming tap of tapping.
To achieve these goals, thin-wall part of the present invention carries out tapping with the thin-wall part of thread forming tap pair and screw tap pitch (P) same degree thickness of slab, described thin-wall part is characterised in that with thread forming tap, use in the form of thread of thread forming tap at described thin-wall part, when screw thread original triangle height was H, setting the low height that cuts to it of thread crest for was that shallow the cutting to it highly of the limit, Bottom of Thread screws rate (H above H/4, screw thread with H/8
2) be 80～85%, according to screw tap pitch (P), make arc surface (r with the circle of described Bottom of Thread both sides inscribe
2) starting point, footpath (H/2) only descends with given size (h) from screw tap, and described thin-wall part is reduced with the point diameter of thread forming tap.
In addition, described thin-wall part is characterised in that with thread forming tap described thin-wall part is odd number with radially (radial) number of thread forming tap.
In addition, described thin-wall part is characterised in that with thread forming tap described thread crest is arc surface (r
1), be provided with fillet.
In addition, described thin-wall part is characterised in that with thread forming tap described given size (h) is 10 μ～40 μ.
In addition, described thin-wall part is characterised in that with thread forming tap, and the size that cuts height of described Bottom of Thread sets that to screw rate by screw thread littler by 5% than box inner diameter full-size for.
According to thin-wall part thread forming tap of the present invention, because screw thread is screwed rate (H
2) set for than common screw thread and screw rate (H
2) little, make the R face (r of Bottom of Thread
2) starting point from screw tap the footpath (H/2) only descend with given size (h), and reduce the point diameter of screw tap, so when tapping, can cut negative thread (bottom outlet) reliably, wall is sufficiently swelled, and under the situation of thin-wall part, because the change in size after the tapping is little during than common heavy section casting tapping, thus can set footpath size in the screw tap lessly, thus can make the gap of pin thread after the tapping and negative thread as much as possible little.
Its result can obtain sufficiently high screw-down torque aspect installation strength, and the seam portion on the female thread crests is diminished, and avoids producing " burr ", " overlap " or " screw floats ", can realize improving the quality of products.In addition, by making the R face (r of Bottom of Thread
2) starting point footpath from screw tap only descend with given size (h), can be chimeric with gauge reliably, thus can check negative thread effectively.
Description of drawings
Fig. 1 is the shape key diagram of the thread forming tap threaded portion of expression one embodiment of the invention.
Fig. 2 is the details drawing of the Bottom of Thread of threaded portion.
Fig. 3 is the overall structure figure of the different thread forming tap of type.
Fig. 4 is a sectional drawing of radially counting different thread forming taps.
Fig. 5 A is the key diagram with the negative thread of thread forming tap formation of the present invention.
Fig. 5 B is a key diagram of using the negative thread of thread forming tap formation in the past.
Description of reference numerals
1 thread forming tap
2 bar portions
3 threaded portions
4 switch-in parts
5 parallel thread portions (tooth portion fully)
10 thread crest
11 Bottom of Thread
12 radial part
100 negative threads
101 seam portions
The specific embodiment
Utilize embodiment below and, thin-wall part of the present invention is elaborated with thread forming tap with reference to accompanying drawing.
Embodiment
Fig. 1 is the shape key diagram of the thread forming tap threaded portion of expression one embodiment of the invention, Fig. 2 is the details drawing of the Bottom of Thread of threaded portion, Fig. 3 is the overall structure figure of the different thread forming tap of type, Fig. 4 is a sectional drawing of radially counting different thread forming taps, and Fig. 5 A is the key diagram with the negative thread of thread forming tap formation of the present invention.
As shown in Figure 3, following Class1, the type 2 of M4～M7 and the thread forming tap 1 of the type 3 more than the M8 of M3 comprises: bar portion 2, and end 2a is a cardinal principle quadrangle section thereafter, is used to be clamped in not shown tapping machine; Tapping (tapping processing) is carried out to bottom outlet in threaded portion 3, and that this bottom outlet is formed on is not shown, on the thin-wall part of thickness of slab and screw tap pitch same degree.
The parallel thread portion 5 (tooth portion fully) that described threaded portion 3 has switch-in part 4 and is connected with this switch-in part 4, this switch-in part 4 forms the thin taper of front end with standard incision inclination angle, and in the thread forming tap of any kind, the length of switch-in part 4 for example all makes than 6P (6 tooth) and common 4P (4 tooth) is long and the screw tap point diameter diminishes.In addition, according to the type difference of switch-in part 4, the situation of 2P (2 tooth) → 3P (3 tooth) is arranged also.In addition, also can not change the length of switch-in part 4, reduce the screw tap point diameter but increase the incision inclination angle.
In the present embodiment, become as depicted in figs. 1 and 2 form of thread (shape).
That is, be that the original triangle height of the screw thread of 60 ° (half of thread angle is 30 °) is under the situation of H in the ridge angle, thread crest 10 is low to cut to it highly as far as possible near H/8 (cutting the limit), in addition, the shallow as far as possible height H that cuts to it of Bottom of Thread 11
3Surpass H/4, and screw thread is screwed rate H
2Be set at 80～85% (with reference to H
1=5/8H=100%).
In addition, described thread crest 10 is R face (arc surface) r
1(R shape, circular arc), be provided with fillet, and according to the screw tap pitch P, make R face r with the circle of described Bottom of Thread 11 both sides inscribes
2Starting point (starting point), from screw tap the footpath H/2 only descend to Bottom of Thread one side with given size h (h=10 μ～40 μ, nominal size is preferred 30 μ of the screw tap of M5 * 0.8).
In addition, R face (arc surface) r of described Bottom of Thread 11 both sides
2Connect by flat horizontal surface S.In addition, described Bottom of Thread 11 cuts height H
3Size be preferably set to that to screw rate by screw thread littler by 5% than box inner diameter full-size.
In addition, as shown in Figure 4, the quantity of the radial part 12 of thread forming tap 1 is set to odd number, that is, 3 radially or 5 radially.In addition, oil groove can be set, also oil groove can be set.
Like this, according to present embodiment, because screw thread is screwed rate H
2Be set at than usually little 80～85% and make the R face r of Bottom of Thread 11
2Starting point from screw tap the footpath H/2 only descend with given size h, and reduce the point diameter of screw tap, therefore, when tapping, can cut in the negative thread (bottom outlet) reliably, wall is sufficiently swelled, and can make the gap of pin thread after the tapping and negative thread as much as possible little.
That is, if screw thread screws rate H
2Set for bigger, then under the situation of thin-wall part, negative thread is to the Bottom of Thread direction protuberance of screw tap, make the seam portion 101 on the thread crest of negative thread 100 open (with reference to Fig. 5 B) significantly, meeting generation screw-down torque is not enough, screw floats and produce " burr " or rough sledding such as " overlaps ", and present embodiment can prevent the problems referred to above.
Its result obtains sufficiently high screw-down torque aspect installation strength, and shown in Fig. 5 A, the seam portion 101 on the thread crest of negative thread 100 diminishes, and has avoided generation " burr ", " overlap " or " screw floats ", can realize improving the quality of products.In addition, by making the R face r of Bottom of Thread 11
2Starting point footpath H/2 from screw tap only descend with given size h, can be chimeric with gauge reliably, thus can check negative thread effectively.In addition, following result has been confirmed in inventor's test: be the screw tap of M5 * 0.8 according to nominal size, in material is that chromate-free steel plate JN (ェ コ Off ロ Application テ ィ ァ JN, Eco Frontier JN), thickness of slab are under the situation of thin-wall part of t=0.8mm, can obtain the screw-down torque of 46kgf-cm.
In addition, because thread crest 10 is R face r
1(R shape), be provided with fillet, and Bottom of Thread 11 cut height H
3Size to be configured to screw rate by screw thread littler by 5% than box inner diameter full-size, so can carry out tapping swimmingly, the wall of negative thread (bottom outlet) is sufficiently swelled.
In addition, because the quantity of the radial part 12 of thread forming tap 1 is configured to odd number, be 3 radially or 5 radially, so particularly in the tapping after edge processing, can suppress towards edge external diameter (cardinal extremity and front end both sides') expansion, the wall of negative thread (bottom outlet) is sufficiently swelled.
Promptly, quantity in the radial part 12 of thread forming tap 1 is under the situation of odd number, because for example 3 per 120 °, 5 per 72 ° of effects radially time the radially the time have the power that makes the negative thread protuberance, so that expansion disperse towards the power of edge external diameter, thereby diminish, and under even number situation radially, because relative radial part matches, towards the direction generation effect of edge external diameter, institute is so that not enough towards the protuberance of box inner diameter portion to expansion, the underfill aperture that needs are littler.In addition, though the direction of wishing tapping (tapping processing) this moment is identical with the direction of processing towards edge, also can from carry out tapping towards the opposite direction of edge machine direction.
In addition, the present invention is not limited to the foregoing description, without departing from the spirit and scope of the present invention, can carry out the various changes such as change that pitch (P) or screw thread screw rate.
Industrial applicibility
Extruding tap for thin wall of the present invention is applicable to and is in casing (shell) automobile ancillary of vibration under the environment etc., that be made of thin-wall part or the negative thread processing of light-wall pipe.
Claims (5)
1. a thin-wall part thread forming tap carries out tapping to the thin-wall part with screw tap pitch (P) same degree thickness of slab, and described thin-wall part is characterised in that with thread forming tap,
With in the form of thread of thread forming tap, when screw thread original triangle height was H, setting the low height that cuts to it of thread crest for was that shallow the cutting to it highly of the limit, Bottom of Thread screws rate (H above H/4, screw thread with H/8 at described thin-wall part
2) be 80～85%,
According to screw tap pitch (P), make arc surface (r with the circle of described Bottom of Thread both sides inscribe
2) starting point, footpath (H/2) only descends with given size (h) from screw tap,
And described thin-wall part is reduced with the point diameter of thread forming tap.
2. thin-wall part thread forming tap according to claim 1 is characterized in that, described thin-wall part is an odd number with the radially number of thread forming tap.
3. thin-wall part thread forming tap according to claim 1 is characterized in that, described thread crest is arc surface (r
1), be provided with fillet.
4. thin-wall part thread forming tap according to claim 1 is characterized in that, described given size (h) is 10 μ～40 μ.
5. thin-wall part thread forming tap according to claim 1 is characterized in that, the size that cuts height of described Bottom of Thread sets that to screw rate by screw thread littler by 5% than box inner diameter full-size for.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-011533 | 2010-01-22 | ||
| JP2010011533A JP2011148044A (en) | 2010-01-22 | 2010-01-22 | Thread forming tap for thin material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102145418A true CN102145418A (en) | 2011-08-10 |
Family
ID=44420007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100220811A Pending CN102145418A (en) | 2010-01-22 | 2011-01-19 | Extruding tap for thin wall |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2011148044A (en) |
| KR (1) | KR20110086506A (en) |
| CN (1) | CN102145418A (en) |
| TW (1) | TW201143943A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104227151A (en) * | 2013-06-19 | 2014-12-24 | 许灵生 | Tapping knife |
| CN104411437A (en) * | 2012-06-22 | 2015-03-11 | Osg株式会社 | Thread-forming tap |
| CN104668672A (en) * | 2015-03-04 | 2015-06-03 | 陕西理工学院 | Chopping extrusion screwdriver |
| CN109304526A (en) * | 2018-11-01 | 2019-02-05 | 无锡威孚奥特凯姆精密机械有限公司 | Thread forming tap and the manufacturing method of high pressure connection |
| CN109648022A (en) * | 2019-02-02 | 2019-04-19 | 张咏 | A kind of seamless impulse- free robustness thread forming tap and its internal screw thread of production |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118139711A (en) * | 2021-12-02 | 2024-06-04 | 株式会社不二越 | Screw tap |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325044U (en) * | 1989-07-21 | 1991-03-14 | ||
| JPH06238518A (en) * | 1993-02-12 | 1994-08-30 | Clarion Co Ltd | Cold forming tap |
| JP3025044U (en) * | 1995-11-21 | 1996-06-07 | オーエスジー株式会社 | Male thread member and its processing tool |
| CN1319469A (en) * | 2000-03-09 | 2001-10-31 | 株式会社田野井制作所 | Screwtap and threading method |
| US20040170482A1 (en) * | 2003-02-27 | 2004-09-02 | Henderer Willard E. | Precision cemented carbide threading tap |
| US20060140739A1 (en) * | 2003-10-23 | 2006-06-29 | Tsuyoshi Komine | Internal thread member, external thread member, and cutter for internal thread |
| KR20070066520A (en) * | 2005-12-22 | 2007-06-27 | 재단법인 포항산업과학연구원 | Thread shape for increase of fatique properties |
| CN2925715Y (en) * | 2006-07-05 | 2007-07-25 | 潍柴动力股份有限公司 | Extruded tap of machining connecting-rod threaded hole |
| CN101296772A (en) * | 2006-11-30 | 2008-10-29 | Osg株式会社 | Screw tap |
| JP3146222U (en) * | 2008-08-28 | 2008-11-06 | 株式会社田野井製作所 | Raising tap |
| CN101400469A (en) * | 2007-04-26 | 2009-04-01 | Osg株式会社 | Spiral tap |
| JP2009101485A (en) * | 2007-10-25 | 2009-05-14 | Tanoi Seisakusho:Kk | Thread forming tap for machining large diameter female screw |
-
2010
- 2010-01-22 JP JP2010011533A patent/JP2011148044A/en active Pending
-
2011
- 2011-01-06 TW TW100100524A patent/TW201143943A/en unknown
- 2011-01-12 KR KR1020110003030A patent/KR20110086506A/en not_active Application Discontinuation
- 2011-01-19 CN CN2011100220811A patent/CN102145418A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325044U (en) * | 1989-07-21 | 1991-03-14 | ||
| JPH06238518A (en) * | 1993-02-12 | 1994-08-30 | Clarion Co Ltd | Cold forming tap |
| JP3025044U (en) * | 1995-11-21 | 1996-06-07 | オーエスジー株式会社 | Male thread member and its processing tool |
| CN1319469A (en) * | 2000-03-09 | 2001-10-31 | 株式会社田野井制作所 | Screwtap and threading method |
| US20040170482A1 (en) * | 2003-02-27 | 2004-09-02 | Henderer Willard E. | Precision cemented carbide threading tap |
| US20060140739A1 (en) * | 2003-10-23 | 2006-06-29 | Tsuyoshi Komine | Internal thread member, external thread member, and cutter for internal thread |
| KR20070066520A (en) * | 2005-12-22 | 2007-06-27 | 재단법인 포항산업과학연구원 | Thread shape for increase of fatique properties |
| CN2925715Y (en) * | 2006-07-05 | 2007-07-25 | 潍柴动力股份有限公司 | Extruded tap of machining connecting-rod threaded hole |
| CN101296772A (en) * | 2006-11-30 | 2008-10-29 | Osg株式会社 | Screw tap |
| CN101400469A (en) * | 2007-04-26 | 2009-04-01 | Osg株式会社 | Spiral tap |
| JP2009101485A (en) * | 2007-10-25 | 2009-05-14 | Tanoi Seisakusho:Kk | Thread forming tap for machining large diameter female screw |
| JP3146222U (en) * | 2008-08-28 | 2008-11-06 | 株式会社田野井製作所 | Raising tap |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104411437A (en) * | 2012-06-22 | 2015-03-11 | Osg株式会社 | Thread-forming tap |
| US9802262B2 (en) | 2012-06-22 | 2017-10-31 | Osg Corporation | Thread-forming tap |
| CN104227151A (en) * | 2013-06-19 | 2014-12-24 | 许灵生 | Tapping knife |
| CN104668672A (en) * | 2015-03-04 | 2015-06-03 | 陕西理工学院 | Chopping extrusion screwdriver |
| CN109304526A (en) * | 2018-11-01 | 2019-02-05 | 无锡威孚奥特凯姆精密机械有限公司 | Thread forming tap and the manufacturing method of high pressure connection |
| CN109648022A (en) * | 2019-02-02 | 2019-04-19 | 张咏 | A kind of seamless impulse- free robustness thread forming tap and its internal screw thread of production |
| CN109648022B (en) * | 2019-02-02 | 2024-01-23 | 张咏 | Seamless burr-free extrusion tap and internal thread manufactured by same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201143943A (en) | 2011-12-16 |
| JP2011148044A (en) | 2011-08-04 |
| KR20110086506A (en) | 2011-07-28 |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110810 |