US20050175433A1 - Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method - Google Patents

Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method Download PDF

Info

Publication number
US20050175433A1
US20050175433A1 US11/028,924 US2892405A US2005175433A1 US 20050175433 A1 US20050175433 A1 US 20050175433A1 US 2892405 A US2892405 A US 2892405A US 2005175433 A1 US2005175433 A1 US 2005175433A1
Authority
US
United States
Prior art keywords
area
nut
internal threaded
bore
teeth
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.)
Abandoned
Application number
US11/028,924
Inventor
Manfred Vogel
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.)
Neumayer Tekfor GmbH
Original Assignee
Erich Neumayer GmbH and Co KG
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 Erich Neumayer GmbH and Co KG filed Critical Erich Neumayer GmbH and Co KG
Publication of US20050175433A1 publication Critical patent/US20050175433A1/en
Assigned to NEUMAYER TEKFOR GMBH reassignment NEUMAYER TEKFOR GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ERICH NEUMAYER GMBH & CO. KG
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • 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
    • 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
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced

Definitions

  • the invention at hand relates to a method for producing a nut according to the generic term of patent claim 1 , a screw tap for performing the method according to the generic term of patent claim 5 , as well as a nut produced according to the method according to the generic term of patent claim 15 .
  • a nut produced by means of massive reshaping is known from DE 195 32 709, which has a drive area for the contact of a tool, an area for attaching on a component, as well as a clamping area that is slotted in longitudinal direction of the nut so that clamping tongues are arranged between two slots each in the circumference direction. Both the clamping area with the slots and clamping tongues, as well as the drive area are produced by means of massive reshaping, such as cold and/or hot extrusion.
  • the nut's internal thread extends along the drive area at a diameter that is constant, and that is reduced at increasing distances from the drive area at least across part of the axial extension of the clamping area.
  • the task of the invention at hand therefore consist of the fact of improving such a method in such a way that it can be performed in a substantially simpler manner, and that nuts can be produced a lot more inexpensively according to this method. Furthermore, a screw tap is to be created for the performance of this method.
  • the substantial advantage of the invention at hand consists of the fact that the complicated steps for conically boring the clamping area, and for inserting an internal thread by means of an NC machine that are required in relation to prior art can be omitted, because a special screw tap for the production of the internal thread is used, which is already conically formed, and is inserted into a bore that is cylindrical in the area of the clamping area and of the drive area.
  • the screw tap used in relation to the method according to the invention is embodied in such a way that in addition to a cylindrical thread cutting section for the production of the cylindrical internal thread, it has a special conical thread cutting section in the drive area for the production of the conical area of the internal thread in the clamping area by means of simple screwing in of the screw tap up to a predetermined axial position. It is of particular importance that the screw tap performs merely a simple, straightforward movement.
  • FIG. 1 a longitudinal section across a nut produced in accordance to the inventive method
  • FIG. 2 a view onto the nut of FIG. 1 from the side opposite of the base;
  • FIG. 3 the side view of the inventive screw tap used in relation to the method according to the invention
  • FIG. 4 a section across the screw tap of FIG. 3 along the line VI-VI;
  • FIG. 5 an enlarged illustration of the various
  • FIG. 6 of the screw tap screwed into a nut up to a predetermined position.
  • the nut illustrated in FIG. 1 essentially consists of a drive area 2 and a clamping area 3 , which are both produced as one piece. On the side facing the base, i.e., on the side opposite of the clamping area 3 , the nut has a support area 5 .
  • the cylindrical threaded section of the drive area 2 of the nut is identified by 7 .
  • the drive area 2 has deformations 9 at regular intervals on its radial exterior, which, for instance, form a multitude of edges, and are provided for the contact of the tool, with the aid of which the nut can be pivoted on a bolt, or similar.
  • the clamping area 3 that axially joins the drive area 2 is embodied as a core, and is limited in its outer circumference by a conically, or taper shaped lateral area 9 , the cone tip of which faces in the opposite direction of the support area 5 .
  • the clamping area 3 has several slots, or axially directed recesses 11 that are distributed across the circumference, which axially extend up to the drive area 2 .
  • the clamping tongues formed between two slots each each are identified by 13 .
  • the conical threaded section of the clamping area 3 is identified by 8 .
  • threaded sections 7 and 8 are produced by initially inserting a cylindrical bore into the drive area 2 , and a conical bore into the clamping area 3 , and that the cylindrical threaded section 7 , and the conical threaded section 8 are subsequently produced with the aid of an NC thread cutter.
  • the threaded sections 7 and 8 are produced by means of manufacturing only one single axially extending cylindrical bore B in that a screw tap 15 embodied according to FIG. 3 is screwed into the cylindrical bore B from the side of the support area 5 up to a predetermined position in a manner to be further explained as follows.
  • the bore can preferably be produced by reshaping.
  • the screw tap 15 has three different threaded cutting sections that are arranged next to each other, viewed in axial direction from the front.
  • the front most centering cutting section 17 is first inserted into the cylindrical bore of the nut and serves for the purpose of centering the screw tap 15 in relation to the cylindrical bore B of the nut, and to pre-cut the thread in the section 21 .
  • the cutting section 19 joins the centering cutting section 17 , which serves for the production of the conical internal thread of the clamping area 3 .
  • a third cutting section 21 is positioned on the side opposite of the centering cutting section 17 , which serves the purpose of producing the cylindrical internal threaded section 7 in the drive area 2 of the nut.
  • the cutting section 21 provided for the production of the cylindrical internal threaded section 7 in the drive area 2 has teeth, the circular heads 23 and circular legs 25 of which extend in longitudinal direction L.
  • the teeth of the cutting section 19 are identified by 26 . They are embodied in such a way that their circular heads 27 each are positioned on an intended lateral area, which is tilted at an angle al to the longitudinal direction L so that the teeth 26 each have a smaller tooth height toward the front side of the screw tap 15 .
  • the circular legs 29 of the teeth 26 of the cutting section 19 are also arranged at an angle al in relation to the lateral area that is tilted toward the axial direction L.
  • the teeth 30 of the centering cutting section 17 are created in such a way that their circular heads 31 are positioned on an intended lateral area that is tilted toward the longitudinal axis of the screw tap 15 at an angle ⁇ 2 , whereby the angle ⁇ 2 preferably is larger than the angle ⁇ 1 .
  • the teeth 30 have a teeth height that decreases toward the direction of the front side.
  • the respective circular legs 33 of the teeth 30 are also arranged on an intended lateral area at an angle in relation to the longitudinal axis L, which, for instance, corresponds to angle ⁇ 1 .
  • the screw tap 15 is screwed into continuous, i.e., both in the clamping area 3 , and in the drive area 2 cylindrically extending bore of a nut that is centered and clamped in the thread cutter up to an axial position until the cutting section 19 is located at the desired position of the clamping area 3 , and the cutting section 21 is at the desired position at the drive area 2 .
  • the cutting section 17 protrudes at least partially across the clamping area 3 of the nut. After the mentioned predetermined position has been achieved, the desired conical thread is therefore created in the clamping area 3 , and the teeth 22 of the cutting section 21 are mapped exactly in the drive area 2 . This condition is illustrated in FIG. 6 .
  • the screw tap 15 is turned back from the predetermined position, and is removed from the nut.
  • the teeth 30 and/or 26 of the cutting sections 17 and 19 serve for precutting of the teeth of the internal thread 7 of the drive area during the screwing in of the screw tap 15 up to the predetermined position. Accordingly, the teeth 30 of the section 17 serve for precutting of the teeth of the internal thread 8 of the clamping area.
  • the cutting sections 19 and 21 can be dimensioned in such a way that part of the teeth 22 of the cutting section 21 can also be penetrated into the clamping area 3 in the predetermined position so that the created cylindrical threaded section 7 extends beyond the drive area 2 , partially into the clamping area 3 .

Abstract

A nut having a clamping area and a drive area with a bore passing therethrough, the bore having a cylindrical internal threaded section that extends at least partially across the drive area and a conical internal threaded section that extends at least partially across the clamping area. The clamping area is embodied as a core with an outer circumference limited by a conical or tapered lateral area, the tip of which faces away from the drive area.

Description

  • The invention at hand relates to a method for producing a nut according to the generic term of patent claim 1, a screw tap for performing the method according to the generic term of patent claim 5, as well as a nut produced according to the method according to the generic term of patent claim 15.
  • A nut produced by means of massive reshaping is known from DE 195 32 709, which has a drive area for the contact of a tool, an area for attaching on a component, as well as a clamping area that is slotted in longitudinal direction of the nut so that clamping tongues are arranged between two slots each in the circumference direction. Both the clamping area with the slots and clamping tongues, as well as the drive area are produced by means of massive reshaping, such as cold and/or hot extrusion. The nut's internal thread extends along the drive area at a diameter that is constant, and that is reduced at increasing distances from the drive area at least across part of the axial extension of the clamping area.
  • The thread of such a nut is usually produced on NC thread cutters, whereby the bore is initially bored cylindrically in the drive area, and conically in the clamping area, and the thread is then cut on the NC cutter. It is clear that such a production method is complicated and expensive. In both processes, the tool movement must occur in conformity of this taper.
  • The task of the invention at hand therefore consist of the fact of improving such a method in such a way that it can be performed in a substantially simpler manner, and that nuts can be produced a lot more inexpensively according to this method. Furthermore, a screw tap is to be created for the performance of this method.
  • The task named above is solved by means of a method having the characteristics of patent claim 1. The nuts produced by means of the inventive method are marked by the characteristics of patent claim 15. A screw tap for the performance of the method has the characteristics of patent claim 5.
  • The substantial advantage of the invention at hand consists of the fact that the complicated steps for conically boring the clamping area, and for inserting an internal thread by means of an NC machine that are required in relation to prior art can be omitted, because a special screw tap for the production of the internal thread is used, which is already conically formed, and is inserted into a bore that is cylindrical in the area of the clamping area and of the drive area. More specifically, the screw tap used in relation to the method according to the invention is embodied in such a way that in addition to a cylindrical thread cutting section for the production of the cylindrical internal thread, it has a special conical thread cutting section in the drive area for the production of the conical area of the internal thread in the clamping area by means of simple screwing in of the screw tap up to a predetermined axial position. It is of particular importance that the screw tap performs merely a simple, straightforward movement.
  • Further advantageous embodiments of the invention are contained in the sub-claims.
  • The invention and its embodiments are further explained in detail in relation to the figures. They show:
  • FIG. 1 a longitudinal section across a nut produced in accordance to the inventive method;
  • FIG. 2 a view onto the nut of FIG. 1 from the side opposite of the base;
  • FIG. 3 the side view of the inventive screw tap used in relation to the method according to the invention;
  • FIG. 4 a section across the screw tap of FIG. 3 along the line VI-VI;
  • FIG. 5 an enlarged illustration of the various, and
  • FIG. 6 of the screw tap screwed into a nut up to a predetermined position.
  • The nut illustrated in FIG. 1 essentially consists of a drive area 2 and a clamping area 3, which are both produced as one piece. On the side facing the base, i.e., on the side opposite of the clamping area 3, the nut has a support area 5. The cylindrical threaded section of the drive area 2 of the nut is identified by 7.
  • The drive area 2 has deformations 9 at regular intervals on its radial exterior, which, for instance, form a multitude of edges, and are provided for the contact of the tool, with the aid of which the nut can be pivoted on a bolt, or similar.
  • The clamping area 3 that axially joins the drive area 2 is embodied as a core, and is limited in its outer circumference by a conically, or taper shaped lateral area 9, the cone tip of which faces in the opposite direction of the support area 5. The clamping area 3 has several slots, or axially directed recesses 11 that are distributed across the circumference, which axially extend up to the drive area 2. The clamping tongues formed between two slots each are identified by 13. The conical threaded section of the clamping area 3 is identified by 8.
  • It has already been pointed out that normally the threaded sections 7 and 8 are produced by initially inserting a cylindrical bore into the drive area 2, and a conical bore into the clamping area 3, and that the cylindrical threaded section 7, and the conical threaded section 8 are subsequently produced with the aid of an NC thread cutter.
  • According to the method at hand, the threaded sections 7 and 8 are produced by means of manufacturing only one single axially extending cylindrical bore B in that a screw tap 15 embodied according to FIG. 3 is screwed into the cylindrical bore B from the side of the support area 5 up to a predetermined position in a manner to be further explained as follows. The bore can preferably be produced by reshaping.
  • The screw tap 15 has three different threaded cutting sections that are arranged next to each other, viewed in axial direction from the front. The front most centering cutting section 17 is first inserted into the cylindrical bore of the nut and serves for the purpose of centering the screw tap 15 in relation to the cylindrical bore B of the nut, and to pre-cut the thread in the section 21. The cutting section 19 joins the centering cutting section 17, which serves for the production of the conical internal thread of the clamping area 3. In addition to the cutting section 19, a third cutting section 21 is positioned on the side opposite of the centering cutting section 17, which serves the purpose of producing the cylindrical internal threaded section 7 in the drive area 2 of the nut.
  • The previously mentioned cutting sections 17, 19, and 21 are illustrated grossly enlarged in FIG. 5. Accordingly, the cutting section 21 provided for the production of the cylindrical internal threaded section 7 in the drive area 2 has teeth, the circular heads 23 and circular legs 25 of which extend in longitudinal direction L.
  • The teeth of the cutting section 19 are identified by 26. They are embodied in such a way that their circular heads 27 each are positioned on an intended lateral area, which is tilted at an angle al to the longitudinal direction L so that the teeth 26 each have a smaller tooth height toward the front side of the screw tap 15. Preferably, the circular legs 29 of the teeth 26 of the cutting section 19 are also arranged at an angle al in relation to the lateral area that is tilted toward the axial direction L.
  • Finally, the teeth 30 of the centering cutting section 17 are created in such a way that their circular heads 31 are positioned on an intended lateral area that is tilted toward the longitudinal axis of the screw tap 15 at an angle α2, whereby the angle α2 preferably is larger than the angle α1. Preferably, the teeth 30 have a teeth height that decreases toward the direction of the front side. Preferably, the respective circular legs 33 of the teeth 30 are also arranged on an intended lateral area at an angle in relation to the longitudinal axis L, which, for instance, corresponds to angle α1.
  • According to the inventive method, the screw tap 15 is screwed into continuous, i.e., both in the clamping area 3, and in the drive area 2 cylindrically extending bore of a nut that is centered and clamped in the thread cutter up to an axial position until the cutting section 19 is located at the desired position of the clamping area 3, and the cutting section 21 is at the desired position at the drive area 2. The cutting section 17 protrudes at least partially across the clamping area 3 of the nut. After the mentioned predetermined position has been achieved, the desired conical thread is therefore created in the clamping area 3, and the teeth 22 of the cutting section 21 are mapped exactly in the drive area 2. This condition is illustrated in FIG. 6. Finally, the screw tap 15 is turned back from the predetermined position, and is removed from the nut. The teeth 30 and/or 26 of the cutting sections 17 and 19 serve for precutting of the teeth of the internal thread 7 of the drive area during the screwing in of the screw tap 15 up to the predetermined position. Accordingly, the teeth 30 of the section 17 serve for precutting of the teeth of the internal thread 8 of the clamping area.
  • It must be pointed out that the cutting sections 19 and 21 can be dimensioned in such a way that part of the teeth 22 of the cutting section 21 can also be penetrated into the clamping area 3 in the predetermined position so that the created cylindrical threaded section 7 extends beyond the drive area 2, partially into the clamping area 3. In reverse order it is also possible to dimension the cutting sections 19 and 21 in such a way that part of the teeth 26 of the cutting section 19 also penetrate the drive area 2 in the predetermined position.
  • It must be further pointed out that the term “conical” means all shapes that taper toward the front side of the screw tap 15.

Claims (10)

1-16. (canceled)
17. A nut comprising a clamping area, a drive area that is connected to the clamping area in one piece, and a support area that is arranged on a side of the drive area opposite the clamping area, said nut having a bore with a cylindrical internal threaded section that extends at least partially across the drive area, and a conical internal threaded section that extends at least partially across the clamping area, said clamping area being embodied as a core with an exterior circumference limited by a conical or tapered lateral area, a tip of said tapered lateral area facing away from the support area, and said clamping area having several axially positioned recesses distributed across said circumference which axially extend at least up to the drive area.
18. The nut according to claim 17, wherein a radial exterior of said drive area has deformations at regular intervals on which a tool can be placed for turning out of the nut on a bolt.
19. The nut according to claim 17, wherein said cylindrical internal threaded section and said conical internal threaded section of said bore are produced in one step by screwing in a screw tap into a cylindrical bore, said screw tap having in axial direction, viewed from its front side, a centering cutting section having teeth in the drive area which extend in longitudinal direction for production of the cylindrical internal threaded section, and a subsequently joining cutting section having teeth in the clamping area that extend at a first angle laterally to the longitudinal direction for the production of the conical internal threaded sections, and a centering cutting section having teeth that extend at a second angle laterally to the longitudinal direction, said screw tap being screwed into the bore up to a predetermined position to produce said threaded sections therein corresponding to said teeth.
20. A nut comprising a clamping area and a drive area with a bore passing therethrough, said bore having a cylindrical internal threaded section that extends at least partially across the drive area and a conical internal threaded section that extends at least partially across the clamping area, said clamping area being embodied as a core with an outer circumference limited by a conical or tapered lateral area, a tip of said tapered lateral area facing away from the drive area.
21. The nut according to claim 20, wherein said clamping area and said drive area are connected in one piece.
22. The nut according to claim 20, wherein said clamping area includes several axially positioned recesses distributed across said circumference which axially extend at least up to the drive area.
23. The nut according to claim 20, wherein said nut further includes a support area arranged on a side of the drive area opposite the clamping area.
24. The nut according to claim 20, wherein a radial exterior of said drive area has deformations at regular intervals on which a tool can be placed for turning out of the nut on a bolt.
25. The nut according to claim 20, wherein said cylindrical internal threaded section and said conical internal threaded section of said bore are produced in one step by screwing in a screw tap into a cylindrical bore, said screw tap having in axial direction, viewed from its front side, a centering cutting section having teeth in the drive area which extend in longitudinal direction for production of the cylindrical internal threaded section, and a subsequently joining cutting section having teeth in the clamping area that extend at a first angle laterally to the longitudinal direction for the production of the conical internal threaded sections, and a centering cutting section having teeth that extend at a second angle laterally to the longitudinal direction, said screw tap being screwed into the bore up to a predetermined position to produce said threaded sections therein corresponding to said teeth.
US11/028,924 2000-06-21 2005-01-05 Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method Abandoned US20050175433A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10030492.3 2000-06-21
DE10030492A DE10030492C2 (en) 2000-06-21 2000-06-21 A method of manufacturing a nut, a tap for performing the method, and a nut made by this method

Publications (1)

Publication Number Publication Date
US20050175433A1 true US20050175433A1 (en) 2005-08-11

Family

ID=7646453

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/297,943 Expired - Fee Related US6840866B2 (en) 2000-06-21 2001-06-20 Method for producing a nut, screw tap for the performance of the method, and a nut produced according to the method
US11/028,924 Abandoned US20050175433A1 (en) 2000-06-21 2005-01-05 Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10/297,943 Expired - Fee Related US6840866B2 (en) 2000-06-21 2001-06-20 Method for producing a nut, screw tap for the performance of the method, and a nut produced according to the method

Country Status (8)

Country Link
US (2) US6840866B2 (en)
EP (1) EP1292419B1 (en)
JP (1) JP5021138B2 (en)
AT (1) ATE281903T1 (en)
BR (1) BR0111858B1 (en)
DE (2) DE10030492C2 (en)
ES (1) ES2236267T3 (en)
WO (1) WO2001098011A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102357686A (en) * 2011-10-19 2012-02-22 申宗海 Extrusion tap

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10030492C2 (en) * 2000-06-21 2002-10-24 Neumayer Erich Gmbh Co Kg A method of manufacturing a nut, a tap for performing the method, and a nut made by this method
DE10136293B4 (en) * 2001-07-25 2006-03-09 Wilhelm Fette Gmbh Thread former or drill
JP5237659B2 (en) * 2008-03-18 2013-07-17 オーエスジー株式会社 Cutting tap
US8196498B2 (en) * 2009-12-23 2012-06-12 Wen-Pin Wang Forming method for applying a continuous punching to a chain roller
KR101273560B1 (en) 2011-03-21 2013-06-11 주식회사동신유압 Injection molding maching and tie bar with nut for injection molding machine
JP5722722B2 (en) * 2011-07-29 2015-05-27 株式会社Ｌｉｘｉｌ Fixing nut and water tap
CN104708125B (en) * 2015-02-06 2017-06-16 安庆中船动力配套有限公司 A kind of method of the safe tapping of Digit Control Machine Tool
JP5923647B1 (en) * 2015-06-17 2016-05-24 酒井精工株式会社 Nut tap
US11045889B2 (en) * 2015-09-30 2021-06-29 Molding Tool Engineering, Ltd Thread milling cutter and internal pipe thread machining method using the same
US10940553B2 (en) 2016-01-13 2021-03-09 Mitsubishi Hitachi Tool Engineering, Ltd. Screw thread cutter
CN110732735B (en) * 2019-11-19 2021-04-30 中国航发贵州黎阳航空动力有限公司 Internal thread machining method and device for screw hole with conical surface at bottom

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US118238A (en) * 1871-08-22 Improvement in lock-nuts
US2068613A (en) * 1935-07-08 1937-01-19 Clare L Brackett Lock nut
US2349513A (en) * 1943-01-09 1944-05-23 Nat Screw & Mfg Company Method of making lock nuts
US2381110A (en) * 1942-07-11 1945-08-07 Edward F Chandler Lock nut
US4990043A (en) * 1989-03-30 1991-02-05 Rexnord Holdings Inc. Lock nut
US5123793A (en) * 1989-06-01 1992-06-23 Deutsch Fastener Corporation Tapered locking nut
US5735658A (en) * 1993-12-13 1998-04-07 Haerle; Anton Thread forming tool
US6840866B2 (en) * 2000-06-21 2005-01-11 Erich Neumayer Gmbh & Co. Kg Method for producing a nut, screw tap for the performance of the method, and a nut produced according to the method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB335578A (en) * 1929-06-26 1930-09-26 Standard Telephones Cables Ltd Improvements appertaining to screw cutting tools
DE848899C (en) * 1950-08-08 1952-09-08 Willi Mueller Process for the production of conical threads, especially for taps
DE1090899B (en) * 1957-02-21 1960-10-13 Koyemann Nachf Puchstein & Co Threaded dowel pin, process for making it, and taps for cutting the appropriate nut thread
GB1045794A (en) * 1962-04-27 1966-10-19 Bolax Internat Ltd Thread-forming taps
US3378866A (en) * 1966-04-14 1968-04-23 Lamson & Sessions Co Method and tap for making lock nuts
US4396321A (en) * 1978-02-10 1983-08-02 Holmes Horace D Tapping tool for making vibration resistant prevailing torque fastener
US4389145A (en) * 1981-08-31 1983-06-21 Russell, Burdsall & Ward Corporation Method of tapping dual thread fasteners
JPH0295513A (en) * 1988-09-28 1990-04-06 Sakai Seiko Kk Tap
DE4307090B4 (en) * 1992-04-18 2004-04-15 Erich Neumayer Gmbh & Co Kg Nut, especially wheel nut
US5316520A (en) * 1992-06-25 1994-05-31 Green William P Formation of threads with varying pitch
DE19532709A1 (en) * 1994-09-15 1996-03-21 Neumayer Erich Gmbh Co Kg Nut with polygonal outer part for engagement by tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US118238A (en) * 1871-08-22 Improvement in lock-nuts
US2068613A (en) * 1935-07-08 1937-01-19 Clare L Brackett Lock nut
US2381110A (en) * 1942-07-11 1945-08-07 Edward F Chandler Lock nut
US2349513A (en) * 1943-01-09 1944-05-23 Nat Screw & Mfg Company Method of making lock nuts
US4990043A (en) * 1989-03-30 1991-02-05 Rexnord Holdings Inc. Lock nut
US5123793A (en) * 1989-06-01 1992-06-23 Deutsch Fastener Corporation Tapered locking nut
US5735658A (en) * 1993-12-13 1998-04-07 Haerle; Anton Thread forming tool
US6840866B2 (en) * 2000-06-21 2005-01-11 Erich Neumayer Gmbh & Co. Kg Method for producing a nut, screw tap for the performance of the method, and a nut produced according to the method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102357686A (en) * 2011-10-19 2012-02-22 申宗海 Extrusion tap

Also Published As

Publication number Publication date
DE50104492D1 (en) 2004-12-16
ATE281903T1 (en) 2004-11-15
JP2003535706A (en) 2003-12-02
DE10030492C2 (en) 2002-10-24
EP1292419B1 (en) 2004-11-10
US6840866B2 (en) 2005-01-11
JP5021138B2 (en) 2012-09-05
BR0111858B1 (en) 2013-05-07
EP1292419A1 (en) 2003-03-19
ES2236267T3 (en) 2005-07-16
DE10030492A1 (en) 2002-01-17
WO2001098011A1 (en) 2001-12-27
US20030143055A1 (en) 2003-07-31
BR0111858A (en) 2003-05-13

Similar Documents

Publication Publication Date Title
US20050175433A1 (en) Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method
AU751730B2 (en) Screw, especially a concrete screw
EP0804314A1 (en) Improved integral boring and threading tool and method
AU712720B2 (en) Combination die and tap
US20060016312A1 (en) Knockout punch with pilot hole locator
US4177659A (en) Rotatable piercing tools for forming holes surrounded each by a boss in metal plates or the wall of metal tubes
CN1131754C (en) Machining tool special for steel workpiece
US6341926B1 (en) Cutting tool
US5211635A (en) Drill with trimming attachment
WO2011097109A2 (en) Drill bit and method for manufacturing
US20220339714A1 (en) Twist drill bit having a cutting tip with a stepped structure
CA2254205C (en) Fastening screw and method of forming same
WO1996007502A1 (en) Improved integral boring and threading tool and method
US4997322A (en) Automobile body reamer tool
US20030072628A1 (en) Shank and cutting tool having the same
CN112536618A (en) Axial and radial adjusting mechanism for cutter
JP2001018120A (en) Screw machining tool
CN215787269U (en) Screw tap assembly
US4776241A (en) Cutting tool
JP4239378B2 (en) Auxiliary tool for fixing boring tool
JPH0942254A (en) Self-forming screw and fastening method for part
CN214291034U (en) Welding type PCD composite reamer
DE19716431A1 (en) Combination tool for deforming plates and profiled sections
CN2423047Y (en) Hexagon turret fixture used on lathe tailstock
JP2001212625A (en) Pipe burring-up jig and burring machining method

Legal Events

Date Code Title Description
AS Assignment

Owner name: NEUMAYER TEKFOR GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ERICH NEUMAYER GMBH & CO. KG;REEL/FRAME:017286/0916

Effective date: 20051128

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION