WO2008075402A1 - スパイラルタップ - Google Patents
スパイラルタップ Download PDFInfo
- Publication number
- WO2008075402A1 WO2008075402A1 PCT/JP2006/325210 JP2006325210W WO2008075402A1 WO 2008075402 A1 WO2008075402 A1 WO 2008075402A1 JP 2006325210 W JP2006325210 W JP 2006325210W WO 2008075402 A1 WO2008075402 A1 WO 2008075402A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamfer
- cutting edge
- thread
- crest
- chamfering
- Prior art date
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
- 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
- B23G5/00—Thread-cutting tools; Die-heads
-
- 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
- B23G2240/00—Details of equipment for threading other than threading tools, details of the threading process
- B23G2240/08—Evacuation of chips or fines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- the present invention relates to a spiral tap, and more particularly, to a technique for preventing chipping or breakage of a chip when a complete crest is screwed into a screw hole formed by a chamfered portion. Is.
- Patent Literature 1 discloses a snoral tap that cuts a female thread on the inner peripheral surface of the inner thread and discharges chips to the sunk side by the twisted groove.
- Fig. 4 (a) is a cross-sectional view showing an example of the tapping force using such a spiral tap.
- the thread 102 of this spiral tap 100 has a cutting edge along the right-hand twisted groove 104. Is provided, and is tapped by being driven to rotate clockwise as viewed from the shank 106 side.
- a pilot hole 112 is provided in advance in the object 110, and when the spiral tap 100 is screwed into the pilot hole 112 from the tip side, a female screw is attached to the inner peripheral surface of the pilot hole 112. Cutting. In this case, the chips are discharged to the outside of the pilot holes 112 by the twisted grooves 104. Chipping may occur or the tap 100 may break. In particular, if the sharpness deteriorates due to the use of water-soluble cutting fluid or MQL (Minimum Quantity Lubrication), the chips will become difficult to curl and will elongate and move irregularly. As a result, the chipping and breakage of the blade become noticeable.
- MQL Minimum Quantity Lubrication
- Patent Document 2 As shown in FIG. 4 (b), among the complete crests of the screw portion 102, 2-5 crests on the tip side continuous to the biting portion 120 are provided. By cutting off the force near the effective diameter at the top of the shank side ridge 124 located on the shank 106 side, leaving the chamfered side ridge 122, the blade at the tip of the cutting edge Technologies to prevent chipping have been proposed.
- Patent Document 1 JP-A-4-75816
- Patent Document 2 Japanese Patent Laid-Open No. 10-118844
- the present invention has been made in the background of the above circumstances, and its purpose is to swallow chips when a complete crest is screwed into a screw hole formed by a chamfered portion.
- the purpose is to more effectively prevent the occurrence of chipping and breakage.
- the first invention has a threaded portion in which a cutting edge is formed along a threaded groove provided so as to divide the male thread, and the screw is formed in the pilot hole.
- the spiral tap in which the female thread is cut into the inner peripheral surface of the pilot hole by the cutting blade and the chips are discharged to the shank side by the torsion groove when the portion is screwed in (a)
- the complete thread portion of the threaded portion leave a chamfered side crest that exceeds the crest of the chamfered portion and is no more than 5 crests, and the shank side crest located on the shank side further than that
- the rake face of the blade is provided with a chamfer that recedes in the circumferential direction as it moves toward the top of the thread, and
- the chamfer height of the chamfer is Hneji It is characterized by being in the range of 15% to 100% That.
- a second invention is characterized in that, in the spiral tap of the first invention, the chamfer is a flat chamfer or an arc-shaped R chamfer.
- the thread height of the thread at the full thread is 15% to 100% of the rake face of the cutting edge of the thread at the shank located on the shank side of the complete thread of the thread.
- Chamfering height within the range of Hmen. The chip is easily pushed out to the outer periphery along the edge of the swarf, and the stagnation of the swarf itself is suppressed, and the cutting edge strength is increased by chamfering. Is prevented.
- the chewed side thread part exceeding one thread on the tip side continuous to the chewed part and not more than 5 threads has the same complete thread shape as the above, and the chamfering is the same.
- the shank side provided on the shank can maintain the original thread shape except for the cutting edge part, the entire area of the complete peak part is compared with the case where the crest part near the effective diameter is chamfered into a cylindrical shape. With this, it is possible to obtain an excellent guide action (lead feed), and it is possible to cut female threads with high force accuracy.
- FIG. 1 is a diagram showing a spiral tap according to an embodiment of the present invention, in which (a) is a front view, (b) is an enlarged view of a section B-B in (a), and (c) is ( It is an enlarged view of a CC section in a).
- FIG. 2 is a diagram for explaining another embodiment of the present invention, and is a cross-sectional view corresponding to (c) of FIG.
- FIG. 3 A diagram illustrating the results of durability tests using 10 types of test products No. 1 to No. 10 including the product of the present invention, and (a) shows the results of 10 types of test products.
- FIG. 4B is a diagram illustrating the test results of the durability test.
- FIG. 4 A diagram for explaining a conventional spiral tap.
- (A) is a cross-sectional view showing a state where a threaded portion is screwed into a pilot hole and tapping is performed, and
- (b) is a view showing chipping of chips.
- FIG. 5 is a front view showing a spiral tap in which a cylindrical pile is given to a complete pile to prevent it.
- the spiral tap of the present invention discharges chips to the shank side.
- the spiral tap provided with a cutting edge along the right-handed twist groove is clockwise when viewed from the shank side.
- the spiral tap When cutting by rotary drive, and rotating the spiral tap with a cutting edge along the left-handed twist groove, turning counterclockwise by looking at the side of the shank. May be cut.
- the above-mentioned spiral tap can be configured using various tool materials such as high-speed tool steel (high-speed) and cemented carbide, and hard materials such as T1A1N, TiN, and TiCN as necessary. A coating can also be coated.
- the spiral tap of the present invention can be used for water-soluble cutting fluid, MQL (minimum amount of lubrication), or dry processing without cutting fluid, which causes irregular movements that cause poor chipping and chip growth. It is possible to use it in wet processing where tapping is performed while supplying a sufficient amount of lubricant.
- the chamfered ridges that do not chamfer the rake face cannot guide the tap with high accuracy (lead feed) if the ridge is less than one ridge. It is necessary to make it more than one crest and less than 5 crests because it becomes easy to squeeze chips and easily causes chipping and breakage.
- the chamfer height Hmen is a radial dimension based on the tip (outer peripheral edge) of the cutting edge before chamfering.
- the thread height Hneji at the complete thread is the radial dimension from the root to the top of the thread, and is specifically expressed as “(tap outer diameter tap valley diameter) Z2.” If the chamfering height Hmen is less than 15% of the thread height Hneji, the chamfering does not provide a sufficient effect of suppressing chipping of the chips and the effect of improving the cutting edge strength. Since a gap is created between the hole (screw hole) and it becomes easier to swallow chips, it is necessary to set the thread height within the range of 15% to 100% of Hneji.
- the chamfering height Hmen may be constant, but may be changed continuously or stepwise in the axial direction within a predetermined range, or may have different dimensions for a plurality of cutting edges.
- the chamfered shape may be a flat chamfer or an arc-shaped R chamfer.
- the chamfering angle with respect to the reference line L connecting the tip (outer peripheral edge) of the cutting edge and the tap axis O before chamfering is too small.
- about 20 ° or more is desirable because it is not possible to adequately obtain the stagnation effect and the effect of improving the cutting edge strength.
- the chamfering angle ⁇ is too large, the angle between the chamfering and the rake face will be small and the chips will be easily caught.
- This chamfer angle ⁇ may be constant, but within the specified range
- the direction can be changed continuously or stepwise, or the angle can be different for each of the plurality of cutting edges.
- the R chamfer has an arc shape with a substantially constant radius that is smoothly connected to the rake face and the top of the thread, for example, in a cross section perpendicular to the cutting edge. It can be an arc shape with a continuously changing curvature.
- the twist angle of the twist groove provided in the threaded portion is preferably within a range of, for example, about 15 ° to 50 ° from the viewpoint of chip discharge.
- the number of cutting blades is, for example, about 2 to 6 depending on the work material and tap size.
- FIG. 1 is a view showing a three-blade spiral tap 10 according to an embodiment of the present invention, in which (a) is a front view as viewed from a direction perpendicular to the axis O, and (b) is B— in (a). An enlarged view of section B, (c) is an enlarged view of section CC in (a).
- This spiral tap 10 has a shank 12, a neck 14 and a threaded portion 16 integrally on the same axis O in that order, and the threaded portion 16 has a thread groove shape corresponding to the female thread to be processed.
- a male screw is provided, and three twist grooves 20 are provided so as to divide the male screw.
- the threaded portion 16 includes a chamfered portion 22 on the tip side from which the male thread 18 is removed in a taper shape in the axial direction, and a complete thread 18 continuously provided on the chamfered portion 22. And a cutting edge 26 is formed at a ridge line portion with the torsion groove 20.
- the twist groove 20 is right-handed, and its twist angle is, for example, about 40 ° within a range of about 15 ° to 50 °.
- the spiral tap 10 is driven to rotate clockwise in view of the side force of the shank 12. For example, by screwing into the prepared hole 110 of the workpiece 110 shown in FIG. 4 from the tip side, a female screw is cut into the inner peripheral surface of the prepared hole 112, and chips are removed by the twisted groove 20. Sha Discharge to the No. 12 side.
- a shank 12a that is located on the side of the shank 12 beyond the crest portion 24a that exceeds one crest on the tip side continuous with the chamfer portion 22 and that is less than or equal to 5 crests is left.
- a chamfer 30 is provided that retreats in the circumferential direction (heel side) according to the direction force toward the top of the screw thread 18, that is, the outer periphery side.
- (B) of FIG. 1 is a cross-sectional view of the chamfered side ridge 24a where the chamfer 30 is not provided, and (c) of FIG.
- the chamfer height Hmen of the chamfer 30 is, for example, about 50% within the range of 15% to 100% of the thread height Hneji at the complete crest 24.
- the chamfer height Hmen is the radial dimension based on the tip (outer periphery) of the cutting edge 26 before chamfering.
- the thread height Hneji is the radial dimension up to the top of the root of the thread 18 Is "(tap outer diameter-tap valley diameter) / 2 ⁇ .
- the chamfer 30 is a flat chamfer, and the chamfer angle 0 with respect to the reference line L connecting the tip (outer peripheral edge) of the cutting edge 26 and the tap axis O before chamfering is 20 ° to 60 °. Within the range, for example, about 45 °.
- This chamfer angle ⁇ is the force shown in the cross section perpendicular to the axis O in FIG. 1 (c), strictly speaking, the cross section perpendicular to the cutting edge 26 formed along the twist groove 20.
- the chamfer angle is determined within the range of 0 force to 60 °.
- the chamfering height Hmen and the chamfering angle ⁇ are set to have a constant size and a constant angle in the entire region of the shank side peak portion 24b in this embodiment.
- the spiral tap 10 of this embodiment is made of high-speed tool steel (powder high speed), and the screw portion 16 is coated with a hard coating of TiCN.
- the screw thread 18 of the complete thread part 24 is a case where the diameter dimension is constant and does not escape until reaching the heel, but if necessary, the relief of an eccentric relief, etc. Is provided. A predetermined relief is provided in the thread 18 of the biting portion 22.
- the thread height is set on the rake face of the cutting edge 26 of the shank side peak portion 24b located on the shank 12 side of the complete peak portion 24 of the thread portion 16.
- Chamfering height Hmen within the range of 15% to 100% of Hneji Since chamfering 30 is provided at Hmen, chips are easily pushed out along the chamfering 30 to the outer peripheral side. In addition to being suppressed, the chamfering 30 increases the strength of the cutting edge 26, effectively preventing chipping and breakage due to stagnation of chips, and improving durability (life).
- the chamfered side crest 24a that exceeds one crest on the tip side continuous to the chamfered portion 22 and less than 5 crests
- the shank side crest 24b with a chamfer 30 is also the original thread shape except for the cutting edge 26, so compared to the case where the crest portion near the effective diameter is chamfered into a cylindrical shape.
- the force for which flat chamfering is provided as the chamfer 30 is within the range of the chamfering angle 0 force ⁇ 0 ° to 60 °.
- the effect of improving the cutting edge strength and cutting edge strength can be appropriately obtained, and the durability is improved.
- a force in which flat chamfering is provided as the chamfering 30 may be provided with an R chamfering 32 as shown in FIG.
- the R chamfer 32 is smoothly connected to the rake face (twist groove 20) and the top of the thread 18 in a cross section perpendicular to the cutting edge 26 formed along the twist groove 20.
- it is configured by an arc having a substantially constant radius.
- Fig. 3 is a diagram for explaining the results of examining durability by preparing twelve each of 10 kinds of test products Nol to NolO including the product of the present invention and performing tapping under the following processing conditions. (a) is 1
- (b) is a diagram showing the test results of examining the durability based on the presence or absence of blade chipping or breakage.
- Cutting fluid water-soluble cutting fluid
- test product Nol is a conventional product in which the chamfer 30 or 32 is not provided.
- Test article N. No. 2 is a conventional product described in Patent Document 2 in which the top portion of the chamfered side peak portion 24a is chamfered in a cylindrical shape on the shank side peak portion 24b.
- Test products No. 4 to No. 8 are all products of the present invention, and the number of chamfered crests 24a is 1.5 or 4 chamfers, and the chamfer angle ⁇ is 30 ° or 45 °, or an arc-shaped R chamfer.
- the chamfer height Hmen is 20%, 50% or 100% of the thread height Hneji.
- the spiral tap of the present invention has a chamfer within a range of 15% to 100% of the thread height Hneji on the rake face of the cutting edge of the shank side crest located on the shank side of the complete crest of the thread part. Since chamfering is provided at a height of Hmen, chips are easily pushed along the chamfer to the outer peripheral side, and stagnation of the chips itself is suppressed, and chamfering increases the cutting edge strength. Further, chipping and breakage due to stagnation of chips can be effectively prevented, and excellent durability can be obtained, and it is suitably used for the tapping force of a female screw.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008549997A JPWO2008075402A1 (ja) | 2006-12-18 | 2006-12-18 | スパイラルタップ |
PCT/JP2006/325210 WO2008075402A1 (ja) | 2006-12-18 | 2006-12-18 | スパイラルタップ |
KR1020097013221A KR20090094005A (ko) | 2006-12-18 | 2006-12-18 | 스파이럴 탭 |
CNA2006800566840A CN101563180A (zh) | 2006-12-18 | 2006-12-18 | 螺旋丝锥 |
US12/448,276 US20090317203A1 (en) | 2006-12-18 | 2006-12-18 | Spiral fluted tap |
DE112006004174T DE112006004174T5 (de) | 2006-12-18 | 2006-12-18 | Spiralnut-Gewindeschneider |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/325210 WO2008075402A1 (ja) | 2006-12-18 | 2006-12-18 | スパイラルタップ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008075402A1 true WO2008075402A1 (ja) | 2008-06-26 |
Family
ID=39536041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/325210 WO2008075402A1 (ja) | 2006-12-18 | 2006-12-18 | スパイラルタップ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090317203A1 (ja) |
JP (1) | JPWO2008075402A1 (ja) |
KR (1) | KR20090094005A (ja) |
CN (1) | CN101563180A (ja) |
DE (1) | DE112006004174T5 (ja) |
WO (1) | WO2008075402A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102202825A (zh) * | 2008-10-27 | 2011-09-28 | Osg株式会社 | 螺旋丝锥 |
EP2399700A1 (en) * | 2009-02-20 | 2011-12-28 | OSG Corporation | Tap with drill |
WO2014188603A1 (ja) * | 2013-05-24 | 2014-11-27 | オーエスジー株式会社 | ねじ切削用タップ |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102581395A (zh) * | 2012-03-21 | 2012-07-18 | 锑玛(苏州)精密工具有限公司 | 一种高硬度钢用丝锥 |
CN102554373A (zh) * | 2012-03-21 | 2012-07-11 | 锑玛(苏州)精密工具有限公司 | 一种刃倾角丝锥 |
CN103909310B (zh) * | 2014-04-08 | 2017-01-11 | 浙江美克工具有限公司 | 一种丝锥 |
CN103990869B (zh) * | 2014-06-12 | 2016-03-30 | 航天精工股份有限公司 | 大长径比钛合金件攻丝丝锥 |
US9839984B2 (en) | 2014-08-14 | 2017-12-12 | Kennametal Inc. | Method of making a cutting tap with a correction grind |
CN112356313B (zh) * | 2020-09-29 | 2022-07-29 | 航天材料及工艺研究所 | 一种陶瓷基复合材料微细内螺纹低损伤车削方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711228U (ja) * | 1993-07-21 | 1995-02-21 | オーエスジー株式会社 | ねじ切削用タップ |
JPH10118844A (ja) * | 1996-10-25 | 1998-05-12 | Yamawa Seisakusho:Kk | スパイラルタップ |
JPH10286723A (ja) * | 1997-04-09 | 1998-10-27 | Nissan Motor Co Ltd | ねじ切り用タップ |
JP2004330387A (ja) * | 2003-05-12 | 2004-11-25 | Fuji Electric Holdings Co Ltd | ねじ切削用タップおよびその製作方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1613224A (en) * | 1925-03-06 | 1927-01-04 | Huron Mfg Co | Tap |
US1826323A (en) * | 1930-02-19 | 1931-10-06 | Mueller Co | Combined drill, reamer, and tap |
US3131407A (en) * | 1962-03-08 | 1964-05-05 | Glynton M Roberts | Thread swaging tap |
JPH0475186A (ja) | 1990-07-17 | 1992-03-10 | Mitsubishi Electric Corp | 文字読取装置 |
JP2555470B2 (ja) * | 1990-07-18 | 1996-11-20 | オーエスジー株式会社 | ねじれ溝タップ |
CZ287834B6 (en) * | 1997-07-16 | 2001-02-14 | Osg Corp | Screwing tap for cold forming internal thread and process for producing thereof |
SE522664C2 (sv) * | 2001-04-30 | 2004-02-24 | Sandvik Ab | Skärande gängtapp och förfarande för dess tillverkning |
DE10332930A1 (de) * | 2003-07-19 | 2005-02-03 | Sandvik Ab | Gewindebohrer |
-
2006
- 2006-12-18 DE DE112006004174T patent/DE112006004174T5/de not_active Withdrawn
- 2006-12-18 CN CNA2006800566840A patent/CN101563180A/zh active Pending
- 2006-12-18 US US12/448,276 patent/US20090317203A1/en not_active Abandoned
- 2006-12-18 JP JP2008549997A patent/JPWO2008075402A1/ja active Pending
- 2006-12-18 WO PCT/JP2006/325210 patent/WO2008075402A1/ja active Application Filing
- 2006-12-18 KR KR1020097013221A patent/KR20090094005A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711228U (ja) * | 1993-07-21 | 1995-02-21 | オーエスジー株式会社 | ねじ切削用タップ |
JPH10118844A (ja) * | 1996-10-25 | 1998-05-12 | Yamawa Seisakusho:Kk | スパイラルタップ |
JPH10286723A (ja) * | 1997-04-09 | 1998-10-27 | Nissan Motor Co Ltd | ねじ切り用タップ |
JP2004330387A (ja) * | 2003-05-12 | 2004-11-25 | Fuji Electric Holdings Co Ltd | ねじ切削用タップおよびその製作方法 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102202825A (zh) * | 2008-10-27 | 2011-09-28 | Osg株式会社 | 螺旋丝锥 |
EP2399700A1 (en) * | 2009-02-20 | 2011-12-28 | OSG Corporation | Tap with drill |
EP2399700A4 (en) * | 2009-02-20 | 2013-10-30 | Osg Corp | THREAD CUTTER WITH DRILL |
WO2014188603A1 (ja) * | 2013-05-24 | 2014-11-27 | オーエスジー株式会社 | ねじ切削用タップ |
JP6028098B2 (ja) * | 2013-05-24 | 2016-11-16 | オーエスジー株式会社 | ねじ切削用タップ |
US9737944B2 (en) | 2013-05-24 | 2017-08-22 | Osg Corporation | Thread-cutting tap |
Also Published As
Publication number | Publication date |
---|---|
DE112006004174T5 (de) | 2009-10-29 |
US20090317203A1 (en) | 2009-12-24 |
KR20090094005A (ko) | 2009-09-02 |
JPWO2008075402A1 (ja) | 2010-04-02 |
CN101563180A (zh) | 2009-10-21 |
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