USRE31084E - Swaging dies - Google Patents

Swaging dies Download PDF

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Publication number
USRE31084E
USRE31084E US06/035,572 US3557279A USRE31084E US RE31084 E USRE31084 E US RE31084E US 3557279 A US3557279 A US 3557279A US RE31084 E USRE31084 E US RE31084E
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United States
Prior art keywords
dies
recess
ribs
iaddend
iadd
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Expired - Lifetime
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US06/035,572
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Cedric G. Birks
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
    • B21F15/06—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod

Definitions

  • This invention relates generally to die parts and more particularly to die parts for use in swaging a splice sleeve onto bars or wire ropes in end-to-end or overlapping relation.
  • each of said dies comprising a longitudinally extending recess having a ribbed medial portion including at least two longitudinally extending ribs projecting upward from the recess.
  • the ribs are so located that when the dies are in contact with each other a polygonal recess is produced with the ribs of the dies equidistantly spaced about the periphery of said polygonal recess.
  • FIG. 1 is a side elevational view of a pair of coacting swaging dies in accordance with the instant invention
  • FIG. 2 is a sectional view taken along line 2--2 of FIG. 1;
  • FIG. 3 is an exploded perspective view of a sleeve to be swaged onto a pair of reinforcing bars by the dies of the instant invention.
  • FIG. 4 is a perspective view of the dies forming a swage joint.
  • FIG. 1 a pair of coacting opposed metal swaging die parts 20.
  • the pair of die parts includes an upper die part 22 and a lower die part 24.
  • Each die part is adapted to be secured in a press, not shown.
  • U.S. patent application Ser. No. 710,489 filed herewith .Iadd.now Patent No. 4,047,420 .Iaddend.and whose disclosure is incorporated by reference herein there is disclosed a press particularly suited for using the dies of the instant invention to swage a sleeve onto reinforcing bars to splice them together.
  • the press disclosed and claimed in said application forms no part of the invention of the instant application.
  • each die part 22 and 24 has a recess 26 therein.
  • Each recess is formed of a substantially central, generally semi-cylindrical portion 28 which communicates at each end with a semi-frusto-conical portion 30.
  • a semi-circular cylindrical portion 32 is contiguous with and communicates with the semi-frusto-conical portion 30. The extreme ends of the cylindrical portion 32 are chamfered as at 34.
  • a die half 36 (FIG. 1) is constituted by the inner surface of each semi-cylindrical portion.
  • each die half has plural ribs 38 (FIG. 1) extending longitudinally long the mid-portion of the recess 26.
  • Each rib includes a generally planar top portion 40.
  • the ribs 38 project inwardly of the recess and are so located that when the die pair 20 is in the position shown in FIG. 1 the ribs 38 in the recesses 26 are spaced equidistantly apart around the conjoined central and generally polygonal shaped opening or recess which is formed thereby.
  • the portion 42 of the recesses 26 between immediately adjacent ribs 38 are of generally concave shape as shown clearly in FIG. 1.
  • each die of the die pair includes four ribs equidistantly spaced apart so that when the dies are together the conjoined central opening formed by their recesses is of octagonal shape.
  • each die recess can vary, e.g., there may be two, three, four or more ribs in each die recess, but it is essential to the invention that the die opening or recess have an overall polygonal shape. It is also preferred that each die of the die pair includes the same number of ribs, although it is contemplated that the dies of the die pair 20 may be so constructed as to form an odd number of ribs when the dies of the pair abut.
  • That press comprises a cylinder having a longitudinal axis with a piston therein and reciprocal along the axis.
  • the cylinder has an end and a pair of spaced arms extending from the end in a direction generally parallel to the cylinder with the distance between the outer surface of the arms measured in a direction transverse to the longitudinal axis being less than the outer diameter of the cylinder.
  • a bridging member or cap is detachably secured to and bridges the arms.
  • the bottom die part 24 is secured to the free end of the piston and the upper die part 22 is secured to the cap. Movement of the piston along the longitudinal axis towards the cap effects the concomitant movement of the lower die part toward the upper die part to urge the die parts together.
  • a plurality of screw holes 44 are provided in each of the die parts 22 and 24 for effecting the connection of the die part to the corresponding portions of the press (not shown).
  • die parts 22 and 24 may be used to secure together two reinforcing bars 46 by means of a metal splice tube 48.
  • one end of one reinforcing bar 46 is placed in one end of the splice tube 48 and the two parts 46 and 48 are thereafter swaged together by a force applied, via die parts 22 and 24, in a press.
  • the second bar 46 is then located in the other end portion of the sleeve 48.
  • the connection between the bars 46 is completed by swaging along the length of the splice tube 48 in successive swaging operations or bites.
  • the metal of the splice is deformed into tight engagement with the bar, with little or no elongation of the splice.
  • the number of bites necessary to secure a splice to the bar can be reduced to a minimum.
  • the ribs on the dies are effective for causing equidistantly spaced indentations about the periphery in the swaged sleeve, thereby ensuring an efficient distribution of metal during the swaging operation.
  • a splice sleeve can be pressed onto the reinforcing bars 46 in a single pressing direction, thereby avoiding the necessity of two mutually perpendicular swaging operations, or bites, as has characterized the use of some swaging dies.
  • the number of bites will, of course, depend upon the sleeve length. It should be pointed out at this juncture that it is a feature of the dies of the instant invention that when they are utilized in a press constructed in accordance with the teaching of the aforenoted co-pending application, the longest possible bite length may be achieved during the splicing operation while retaining the ability to operate in very confined spaces.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

Coacting swaging dies for swaging a splice sleeve onto a reinforcing bar. The dies each include a recess in their coacting surfaces. The recess in each surface includes at least two longitudinally extending ribs projecting from said recess for forming longitudinal indentations in the splice tube when said tube is squeezed between said dies. The lands between immediately adjacent ribs are concave. The ribs are so located that when the dies are in contact the recesses conjoin to form an overall polygonal shaped opening, with the ribs being equidistantly spaced thereabout.

Description

This invention relates generally to die parts and more particularly to die parts for use in swaging a splice sleeve onto bars or wire ropes in end-to-end or overlapping relation.
Various apparatus have been disclosed in the prior art and are commercially available incorporating a pair of dies for swaging elongated metal members such as cables or reinforcing bars in an end-to-end relation. See for example, U.S. Pat. No. 676,292 (Wigtel) and U.S. Pat. No. 2,533,943 (Klein) and British Pat. No. 1,293,954 (Zublin). Various dies of the prior art, due to their particular construction present several drawbacks. For example, due to the construction of some prior art dies the use of such dies requires at least two mutually perpendicular swaging operations or bites to effect the securement of a sleeve onto a bar. This is a time consuming and expensive operation. In addition, in some applications, e.g., wherein the members to be joined are disposed in a confined area or disposed in a closely spaced array swaging in mutually perpendicular directions may be rendered extremely difficult if not precluded by the physical space available.
Accordingly, it is a general object of this invention to provide dies for swaging sleeves on the reinforcing bars which overcomes the disadvantages of the prior art.
It is a further object of this invention to provide a pair of swaging dies which enable the maximization of swaging bite lengths while retaining the ability to operate in very confined spaces.
It is still a further object of this invention to provide a pair of swaging dies which produce an efficient distribution of swaging sleeve material during the swaging operation.
These and other objects of the instant invention are achieved by providing for use in a press for swaging a sleeve onto a bar a pair of coacting high strength metal dies. Each of said dies comprising a longitudinally extending recess having a ribbed medial portion including at least two longitudinally extending ribs projecting upward from the recess. The ribs are so located that when the dies are in contact with each other a polygonal recess is produced with the ribs of the dies equidistantly spaced about the periphery of said polygonal recess.
Other objects and many of the attendant advantages of the instant invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing wherein:
FIG. 1 is a side elevational view of a pair of coacting swaging dies in accordance with the instant invention;
FIG. 2 is a sectional view taken along line 2--2 of FIG. 1;
FIG. 3 is an exploded perspective view of a sleeve to be swaged onto a pair of reinforcing bars by the dies of the instant invention; and
FIG. 4 is a perspective view of the dies forming a swage joint.
Referring now to the various figures of the drawing wherein like reference characters refer to like parts, there is shown in FIG. 1 a pair of coacting opposed metal swaging die parts 20. The pair of die parts includes an upper die part 22 and a lower die part 24. Each die part is adapted to be secured in a press, not shown. In U.S. patent application Ser. No. 710,489 filed herewith .Iadd.now Patent No. 4,047,420 .Iaddend.and whose disclosure is incorporated by reference herein, there is disclosed a press particularly suited for using the dies of the instant invention to swage a sleeve onto reinforcing bars to splice them together. The press disclosed and claimed in said application forms no part of the invention of the instant application.
As can be seen in FIGS. 1 and 3, each die part 22 and 24 has a recess 26 therein. Each recess is formed of a substantially central, generally semi-cylindrical portion 28 which communicates at each end with a semi-frusto-conical portion 30. A semi-circular cylindrical portion 32 is contiguous with and communicates with the semi-frusto-conical portion 30. The extreme ends of the cylindrical portion 32 are chamfered as at 34.
A die half 36 (FIG. 1) is constituted by the inner surface of each semi-cylindrical portion.
In accordance with a preferred embodiment of this invention each die half has plural ribs 38 (FIG. 1) extending longitudinally long the mid-portion of the recess 26. Each rib includes a generally planar top portion 40. the ribs 38 project inwardly of the recess and are so located that when the die pair 20 is in the position shown in FIG. 1 the ribs 38 in the recesses 26 are spaced equidistantly apart around the conjoined central and generally polygonal shaped opening or recess which is formed thereby. The portion 42 of the recesses 26 between immediately adjacent ribs 38 are of generally concave shape as shown clearly in FIG. 1.
As can be seen in the embodiment shown in FIG. 1 each die of the die pair includes four ribs equidistantly spaced apart so that when the dies are together the conjoined central opening formed by their recesses is of octagonal shape.
It should be pointed out at this juncture that the number of ribs in each die recess can vary, e.g., there may be two, three, four or more ribs in each die recess, but it is essential to the invention that the die opening or recess have an overall polygonal shape. It is also preferred that each die of the die pair includes the same number of ribs, although it is contemplated that the dies of the die pair 20 may be so constructed as to form an odd number of ribs when the dies of the pair abut.
In use the die parts 22 and 24 are located in a press, preferably one constructed in accordance with the teachings of the aforementioned co-pending United States patent application. That press comprises a cylinder having a longitudinal axis with a piston therein and reciprocal along the axis. The cylinder has an end and a pair of spaced arms extending from the end in a direction generally parallel to the cylinder with the distance between the outer surface of the arms measured in a direction transverse to the longitudinal axis being less than the outer diameter of the cylinder. A bridging member or cap is detachably secured to and bridges the arms. The bottom die part 24 is secured to the free end of the piston and the upper die part 22 is secured to the cap. Movement of the piston along the longitudinal axis towards the cap effects the concomitant movement of the lower die part toward the upper die part to urge the die parts together.
As shown in FIGS. 1 and 2, a plurality of screw holes 44 are provided in each of the die parts 22 and 24 for effecting the connection of the die part to the corresponding portions of the press (not shown).
As shown in FIGS. 3 and 4, die parts 22 and 24 may be used to secure together two reinforcing bars 46 by means of a metal splice tube 48. To that end, one end of one reinforcing bar 46 is placed in one end of the splice tube 48 and the two parts 46 and 48 are thereafter swaged together by a force applied, via die parts 22 and 24, in a press. The second bar 46 is then located in the other end portion of the sleeve 48. The connection between the bars 46 is completed by swaging along the length of the splice tube 48 in successive swaging operations or bites. In each case the metal of the splice is deformed into tight engagement with the bar, with little or no elongation of the splice. As a consequence, the number of bites necessary to secure a splice to the bar can be reduced to a minimum.
As will be appreciated by those skilled in the art, the ribs on the dies are effective for causing equidistantly spaced indentations about the periphery in the swaged sleeve, thereby ensuring an efficient distribution of metal during the swaging operation.
The concave portions of lands 42 between adjacent ribs 38 effect the formation of a plurality of peripherally spaced longitudinally extending ribs 50 (FIG. 4) in the formed connection between bars 46.
By using the dies of the instant invention a splice sleeve can be pressed onto the reinforcing bars 46 in a single pressing direction, thereby avoiding the necessity of two mutually perpendicular swaging operations, or bites, as has characterized the use of some swaging dies. The number of bites will, of course, depend upon the sleeve length. It should be pointed out at this juncture that it is a feature of the dies of the instant invention that when they are utilized in a press constructed in accordance with the teaching of the aforenoted co-pending application, the longest possible bite length may be achieved during the splicing operation while retaining the ability to operate in very confined spaces.
In one practical example of a swage connection formed as described hereinabove the mean tensile strength achieved was 556N/mm2 with little significant difference between maximum and minimum values.
Without further elaboration the foregoing will so fully illustrate my invention that others may, by applying current or future knowledge, readily adapt the same for use under various conditions of service.

Claims (6)

What is claimed as the invention is:
1. For use in a press for swaging a sleeve onto a bar a pair of coacting high strength metal .Iadd.compression .Iaddend.dies, each of said dies comprising a recess extending parallel to the longitudinal axis of said bar .[.and having a ribbed medial portion including.]..Iadd., said recess including a medial portion of uniform size and shape extending along its entire length, the surface of the medial portion of the recess being in the form of .Iaddend.a plurality of radially projecting ribs extending along said axis, said ribs projecting .[.upward.]. .Iadd.radially inward .Iaddend.from said .[.recess.]., .Iadd.surface .Iaddend.with the recess portions .Iadd.of said recess .Iaddend.between immediately adjacent ribs being concavely relieved, the ribs being so located that when said dies are in contact with each other their .[.recesses.]. .Iadd.medial recess portions .Iaddend.conjoin to form a polygonal opening .Iadd.of uniform profile along its length.Iaddend., with the concave relieved portions of the dies equidistantly spaced about the periphery of said polygonal opening.Iadd., said dies being arranged to be brought together in a radial direction by said press, with said sleeve and said bar disposed therebetween to compress the sleeve onto the bar .Iaddend.so that .[.upon swaging.]. the material of the sleeve adjacent each of said concave relieved portions conveniently flows into said relieved portions.
2. The dies of claim 1 wherein each die includes at least three longitudinally extending ribs.
3. The dies of claim 1 wherein each of said dies comprises at least four longitudinally extending ribs.
4. The dies of claim 1 wherein each of said dies include plural ribs whereupon said cylindrical opening is octagonal.
5. The dies of claim 4 wherein each recess has a semi-frusto-conical portion at either side of the ribbed portion and opening outward thereof.
6. The dies of claim 5 wherein each semi-frusto-conical portion opens into a semi-cylindrical portion, the outmost edge of which is chamfered.
US06/035,572 1975-08-04 1979-05-03 Swaging dies Expired - Lifetime USRE31084E (en)

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GB3260175 1975-08-04
GB32601/75 1975-08-04

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FR (1) FR2320149A1 (en)

Cited By (12)

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Publication number Priority date Publication date Assignee Title
US5046350A (en) * 1989-11-03 1991-09-10 United States Surgical Corporation Apparatus for attaching surgical suture components
US5099676A (en) * 1989-11-03 1992-03-31 United States Surgical Corporation Apparatus for attaching surgical suture components
US5131131A (en) * 1989-11-03 1992-07-21 United States Surgical Corporation Method for attaching surgical suture components
US5168619A (en) * 1989-11-03 1992-12-08 United States Surgical Corporation Method for attaching surgical suture components
US5350373A (en) * 1992-10-09 1994-09-27 United States Surgical Corporation Apparatus for attaching surgical suture components
US5383902A (en) * 1993-06-02 1995-01-24 United States Surgical Corporation Surgical needle-suture attachment for controlled suture release
US5394971A (en) * 1993-08-02 1995-03-07 United States Surgical Corporation Apparatus for attaching surgical suture components
US5707391A (en) * 1995-06-07 1998-01-13 United States Surgical Corporation Apparatus and method for attaching surgical needle suture components
US5722991A (en) * 1995-06-07 1998-03-03 United States Surgical Corporation Apparatus and method for attaching surgical needle suture components
US6035692A (en) * 1999-01-19 2000-03-14 The Crosby Group, Inc. Two pass method and apparatus of forming a hexagonal swage for wire rope terminations
US6170145B1 (en) 1999-01-19 2001-01-09 The Crosby Group, Inc. Method of securing a termination element to an end portion of a wire rope
US20040261244A1 (en) * 2003-06-25 2004-12-30 Louis Colarusso Deformed reinforcing bar splice and method

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US4192171A (en) * 1978-03-23 1980-03-11 Automatic Tool Company, Inc. Hand held crimping tool
US4335479A (en) * 1978-05-23 1982-06-22 Celus Fasteners Manufacturing, Inc. Method and apparatus for making blind rivets
AU7800387A (en) * 1986-07-16 1988-02-10 Amphenol Corporation Crimp tool and dies therefor for use in attaching fiber optic cable to fiber optic connectors
CA1320653C (en) * 1988-12-27 1993-07-27 Arthur J. Hyatt Swagging tool
US5069058A (en) * 1988-12-27 1991-12-03 Deutsch Metal Components Swaging tool
JP4584489B2 (en) * 2000-12-28 2010-11-24 幸義 村上 End member mounting method to hollow shaft member for OA equipment
US8474300B2 (en) * 2009-07-20 2013-07-02 Becton, Dickinson And Company Methods to provide a feature on a needle
WO2013059242A2 (en) 2011-10-18 2013-04-25 American Grease Stick Company Tool for coupling fluid lines
CN103357753A (en) * 2013-06-29 2013-10-23 芜湖精英新型建材有限公司 Steel wire head casting die
CN104384361B (en) * 2014-10-31 2016-05-04 平高集团有限公司 A kind of assembly tooling of electromagnetic lock yoke device
US10619342B2 (en) * 2017-02-15 2020-04-14 Tindall Corporation Methods and apparatuses for constructing a concrete structure
USD985029S1 (en) * 2019-06-27 2023-05-02 Barsplice Products, Inc. Cold-swaging die set with tubular splice sleeve
US11951652B2 (en) 2020-01-21 2024-04-09 Tindall Corporation Grout vacuum systems and methods

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US3835690A (en) * 1968-11-02 1974-09-17 Zueblin Ag Device for connecting metallic sleeves to finned reinforcing bars
US3848451A (en) * 1972-11-24 1974-11-19 Deutsch Co Metal Components Swaging tool
GB1432888A (en) 1973-08-06 1976-04-22 Zeitgeist Ag Method and apparatus for compressing sleeves onto structural rods

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US2151032A (en) * 1939-03-21 Joint and method of making same
US2533943A (en) * 1947-06-13 1950-12-12 Nat Telephone Supply Co Die head device
US2716275A (en) * 1948-08-07 1955-08-30 Burndy Engineering Co Inc Method of making a connector with hard particle lining
US3835690A (en) * 1968-11-02 1974-09-17 Zueblin Ag Device for connecting metallic sleeves to finned reinforcing bars
US3731518A (en) * 1971-05-26 1973-05-08 G Blocher Crimping die arrangement
US3771343A (en) * 1972-03-24 1973-11-13 Mc Donnell Douglas Corp Swaging tool
US3848451A (en) * 1972-11-24 1974-11-19 Deutsch Co Metal Components Swaging tool
US3823597A (en) * 1973-07-02 1974-07-16 Mc Donnell Douglas Corp Swaging tool die extender
GB1432888A (en) 1973-08-06 1976-04-22 Zeitgeist Ag Method and apparatus for compressing sleeves onto structural rods
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5099676A (en) * 1989-11-03 1992-03-31 United States Surgical Corporation Apparatus for attaching surgical suture components
US5131131A (en) * 1989-11-03 1992-07-21 United States Surgical Corporation Method for attaching surgical suture components
US5168619A (en) * 1989-11-03 1992-12-08 United States Surgical Corporation Method for attaching surgical suture components
US5046350A (en) * 1989-11-03 1991-09-10 United States Surgical Corporation Apparatus for attaching surgical suture components
US5462543A (en) * 1992-10-09 1995-10-31 United States Surgical Corporation Apparatus for attaching surgical suture components
US5350373A (en) * 1992-10-09 1994-09-27 United States Surgical Corporation Apparatus for attaching surgical suture components
US5608962A (en) * 1992-10-09 1997-03-11 United States Surgical Corporation Method and apparatus for attaching surgical suture components
US5568746A (en) * 1993-06-02 1996-10-29 United States Surgical Corporation Surgical needle-suture attachment for controlled suture release
US5383902A (en) * 1993-06-02 1995-01-24 United States Surgical Corporation Surgical needle-suture attachment for controlled suture release
US5394971A (en) * 1993-08-02 1995-03-07 United States Surgical Corporation Apparatus for attaching surgical suture components
US5707391A (en) * 1995-06-07 1998-01-13 United States Surgical Corporation Apparatus and method for attaching surgical needle suture components
US5722991A (en) * 1995-06-07 1998-03-03 United States Surgical Corporation Apparatus and method for attaching surgical needle suture components
US6035692A (en) * 1999-01-19 2000-03-14 The Crosby Group, Inc. Two pass method and apparatus of forming a hexagonal swage for wire rope terminations
US6170145B1 (en) 1999-01-19 2001-01-09 The Crosby Group, Inc. Method of securing a termination element to an end portion of a wire rope
US20040261244A1 (en) * 2003-06-25 2004-12-30 Louis Colarusso Deformed reinforcing bar splice and method
US20050050843A1 (en) * 2003-06-25 2005-03-10 Louis Colarusso Deformed reinforcing bar splice and method
US6880224B2 (en) * 2003-06-25 2005-04-19 Erico International Corporation Deformed reinforcing bar splice and method
US7507048B2 (en) 2003-06-25 2009-03-24 Erico International Corporation Deformed reinforcing bar splice and method

Also Published As

Publication number Publication date
FR2320149B1 (en) 1982-04-23
FR2320149A1 (en) 1977-03-04
CA1042638A (en) 1978-11-21
US4067224A (en) 1978-01-10
CH636804A5 (en) 1983-06-30

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