US3686743A - Method of fashioning anchorage heads on metal rods - Google Patents

Method of fashioning anchorage heads on metal rods Download PDF

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Publication number
US3686743A
US3686743A US831390A US3686743DA US3686743A US 3686743 A US3686743 A US 3686743A US 831390 A US831390 A US 831390A US 3686743D A US3686743D A US 3686743DA US 3686743 A US3686743 A US 3686743A
Authority
US
United States
Prior art keywords
ring
rod
anchorage
free end
clamp
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.)
Expired - Lifetime
Application number
US831390A
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English (en)
Inventor
Georges Thillet
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.)
S BV
Original Assignee
Sbv
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 Sbv filed Critical Sbv
Application granted granted Critical
Publication of US3686743A publication Critical patent/US3686743A/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
    • 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
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand
    • 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
    • Y10T29/49915—Overedge assembling of seated part
    • 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
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4966—Deformation occurs simultaneously with assembly
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4991—Both members deformed

Definitions

  • FIGS. 1 and 2 of the accompanying drawings are diagrammatic views showing the conventional process for wires of circular cross-section.
  • a metal wire 1 is retained between jaws 2 of a clamping member so that a free part 3 of the rod extends out of the clamping member.
  • the part 3 is compressed by a compressing device 4 to form a knob or the like 6 (FIG. 2).
  • the device 4 For the anchorage to be at least as safe as the wire, the device 4 must be correctly centered; also, the jaw bearing surfaces 5 must be accurately machined to preclude excessive clearance between the wire and the support. Nevertheless, the portion 7 along which the knob 6 is connected to the wire 1 is often likely to rupture.
  • the invention relates to a low-cost method of producing anchorage heads which are completely reliable for wires of any cross-section.
  • a metal ring is threaded onto the free part of the rod, the inner bore of the ring being in cross-section equal to or very slightly larger than the rod, ring length being at most equal to the length of the free part of the rod, whereafter the free part of the rod and the ring are compressed simultaneously by means of the compressing device.
  • FIGS. 1 and 2 are diagrammatic views of the conventional process hereinbefore described, before and after compression, respectively;
  • FIGS. 3 and 4 are diagrammatic views of the method according to the invention, before and after compression respectively;
  • FIGS. 5 and 6 show a constructional variant of the ring, before and after compression respectively
  • FIGS. 7 and 8 show a second constructional variant of the ring, before and after compression respectively
  • FIGS. 9 and 10 show a variant of the method, before and after compression respectively
  • FIGS 1 1 and 12 are plan views of two alternative forms of cross-sectional shapes for the rods and the ring:
  • FIGS 13 -15 are views in longitudinal section of three constructional variants of the ring.
  • FIG. 16 diagrammatically shows an improvement provided by the invention.
  • FIGS 3 and 4 The underlying idea of the method according to the invention is shown in FIGS 3 and 4 where, as is conventional, a metal rod 1 is retained between jaws 2 of a clamping member having a bearing surface 5 so that a free portion 3 of rod 1 sticks out of the clamping member.
  • a metal ring 8 formed with an inner bore 9 is threaded onto the free part 3.
  • the bore 9 is in diameter slightly larger than the rod 1 and can therefore be threaded thereon with reduced clearance.
  • the system formed by the ring and the part 3 is compressed by a compression device 4 as is conventional. Because of friction between the ring surfaces and the bearing surfaces of the device 4 and the clamping member, the central portion of the ring expands and the whole forms a knob 9 shown in FIG. 4.
  • the knob 9 formed by the free part of the rod after compression expands to an extent limited by the ring and becomes joined to the rod at an obtuse angle which lessens the risk of shearing as compared with the conventionally fashioned knob 6. Simultaneous compression of the ring and the rod ensures that the two parts of the knob become rigidly joined together. Ring thickness can be chosen to ensure that the knob has the required bearing surface on the anchorage members.
  • the ring can be devised in various ways to provide further advantages.
  • FIGS. 5 and 6 show a ring formed on its periphery with two grooves 10, 11 forming reduced-strength zones leading during compression to the formation of two widened parts 12, 13 which improve the anchorage of the rod.
  • the top cross-section of the ring can be reduced, in which event only the top part of the system formed by the rod and the ring is deformed and the rod anchorage knob 9 can be separated from the bearing surface 5.
  • a ring 8 can be used whose length is slightly less than the length of the free part 3 of the rod. If the compression device 4 is formed with a recess 14, the rod end is upset to form a second knob 15 which provides anchorage to the ring.
  • a coating of plastics or adhesive which will be polymerized after compression, or a tube of hard solder coated with flux or cleaning agent which will melt, can be provided between the ring and the wire or rod before compression.
  • FIG. 11 is an exemplary plan view of a constructional variant of the ring.
  • the ring periphery, the central bore in the ring, and the free portion 3 of the rod, are of polygonal cross-section. This feature helps the rod and ring to stand up to twisting.
  • FIG. 12 shows another constructional variant of the ring and rod.
  • flat metal members which have a better contact surface with the duct wall and which can be wound contiguously.
  • round rods 3 shown in chain-dotted lines in FIG. 12 are compressed into the cross-sectional shape shown in solid line in FIG. 12.
  • the ring is devised similarly by starting from a ring pierced with a cylindrical bore of a diameter equal to or slightly greater than the diameter of the initial round rod.
  • Such a ring 8 shown in chain-dotted lines in FIG. 12 is compressed laterally at a controlled pressure such that its bore has the same cross-section as the rod 3 after compression.
  • the ring can then be given heat treatment, whereafter the ring outer surface and the bore can be machined to the required shape.
  • the ring is then threaded onto the rod, whereafter the whole is compressed axially according to the invention to form the anchorage. As in the case shown in FIG. 1 1, this anchorage can transmit twisting forces.
  • H68. 13 15 show various embodiments of the ring base.
  • the ring base 16 in shape resembles a spherical cap and bears on a matching dished portion 17 formed in the bearing surface of the clamping member 2 or anchorage device 22. This feature enables the bar to be centered satisfactorily on the clamping device 2 or anchorage device 22.
  • the base 16 and the portion 17 could be of any other equivalent shape such as conical or pyramidal.
  • the periphery of the ring base has a screwthreaded portion 18, so that the ring can be screwed, for instance, onto the anchorage device or receive a nut 23 or any other screwthreaded member adapted to increase the bearing surface on the anchorage device 22 or, for instance, enable wire tension to be adjusted.
  • the base is widened to increase the bearing surface and can be formed with bores 19 adapted to receive, for instance, screws securing to the anchorage device.
  • FIG. 16 shows an improvement according to the invention for limiting the anchorage head cross-section after compression.
  • a die 20 formed with a bore 21 is disposed around the ring 8 before compression and thus limits expansion of the ring 8 during compression and, depending upon the cross-section chosen for the bore 21, enables the anchorage head to be given a maximum cross-section required, for instance, because of the siting of the anchorage.
  • the ring can be of any shape other than the shapes described and can be of any crosssection.
  • Method as described in claim 1 including the step of varying the cross-section of the ring along its length whereby the rod and ring are expanded varying amounts along the length thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forging (AREA)
  • Joining Of Building Structures In Genera (AREA)
US831390A 1968-06-18 1969-06-09 Method of fashioning anchorage heads on metal rods Expired - Lifetime US3686743A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR155434 1968-06-18

Publications (1)

Publication Number Publication Date
US3686743A true US3686743A (en) 1972-08-29

Family

ID=8651294

Family Applications (1)

Application Number Title Priority Date Filing Date
US831390A Expired - Lifetime US3686743A (en) 1968-06-18 1969-06-09 Method of fashioning anchorage heads on metal rods

Country Status (8)

Country Link
US (1) US3686743A (xx)
BE (1) BE733306A (xx)
DE (1) DE1929847A1 (xx)
ES (1) ES368283A1 (xx)
FR (1) FR1582128A (xx)
GB (1) GB1263533A (xx)
LU (1) LU58845A1 (xx)
NL (1) NL6909322A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263238A (en) * 1992-02-20 1993-11-23 Shepherd Products U.S., Inc. Method of forming a stem and assembling a snap ring in a groove in the stem
CN101722260B (zh) * 2009-12-10 2011-04-27 中冶陕压重工设备有限公司 一种转臂类锻件的自由锻造方法
CN104942195A (zh) * 2015-06-12 2015-09-30 中钢集团邢台机械轧辊有限公司 大型钢锭镦粗立料方法
US9190811B2 (en) 2011-03-21 2015-11-17 Epcos Ag Surge arrester with a low response voltage and method for producing same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5776001A (en) * 1994-02-16 1998-07-07 Ccl Systems Limited Thread formation
FR2721641B1 (fr) * 1994-06-28 1996-08-02 Mure Ets Tête de tirant d'ancrage.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1491230A (en) * 1922-02-17 1924-04-22 Gray Alexander Method of making socket wrenches
US1615591A (en) * 1920-09-03 1927-01-25 American Radiator Co Process of making expansible collapsible elements
GB612324A (en) * 1944-05-26 1948-11-11 Eugene Freyssinet A method of and apparatus for anchoring reinforcements, in pre-stressed concrete andstructures provided with such anchorings
US2511920A (en) * 1950-06-20 Method of riveting and assemblage
US2896981A (en) * 1953-08-05 1959-07-28 Pylon Company Inc Rod joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511920A (en) * 1950-06-20 Method of riveting and assemblage
US1615591A (en) * 1920-09-03 1927-01-25 American Radiator Co Process of making expansible collapsible elements
US1491230A (en) * 1922-02-17 1924-04-22 Gray Alexander Method of making socket wrenches
GB612324A (en) * 1944-05-26 1948-11-11 Eugene Freyssinet A method of and apparatus for anchoring reinforcements, in pre-stressed concrete andstructures provided with such anchorings
US2896981A (en) * 1953-08-05 1959-07-28 Pylon Company Inc Rod joint

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263238A (en) * 1992-02-20 1993-11-23 Shepherd Products U.S., Inc. Method of forming a stem and assembling a snap ring in a groove in the stem
CN101722260B (zh) * 2009-12-10 2011-04-27 中冶陕压重工设备有限公司 一种转臂类锻件的自由锻造方法
US9190811B2 (en) 2011-03-21 2015-11-17 Epcos Ag Surge arrester with a low response voltage and method for producing same
CN104942195A (zh) * 2015-06-12 2015-09-30 中钢集团邢台机械轧辊有限公司 大型钢锭镦粗立料方法

Also Published As

Publication number Publication date
NL6909322A (xx) 1969-12-22
FR1582128A (xx) 1969-09-26
ES368283A1 (es) 1971-06-16
DE1929847A1 (de) 1970-02-12
LU58845A1 (xx) 1969-11-10
GB1263533A (en) 1972-02-09
BE733306A (xx) 1969-11-03

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