WO1987002283A1 - A method of welding the links of a chain - Google Patents

A method of welding the links of a chain Download PDF

Info

Publication number
WO1987002283A1
WO1987002283A1 PCT/SE1986/000459 SE8600459W WO8702283A1 WO 1987002283 A1 WO1987002283 A1 WO 1987002283A1 SE 8600459 W SE8600459 W SE 8600459W WO 8702283 A1 WO8702283 A1 WO 8702283A1
Authority
WO
WIPO (PCT)
Prior art keywords
link
welding
insert
chain
links
Prior art date
Application number
PCT/SE1986/000459
Other languages
French (fr)
Inventor
Orvar Nyquist
Original Assignee
SSAB SVENSKT STA^oL AB
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 SSAB SVENSKT STA^oL AB filed Critical SSAB SVENSKT STA^oL AB
Publication of WO1987002283A1 publication Critical patent/WO1987002283A1/en
Priority to NO872336A priority Critical patent/NO872336L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21L—MAKING METAL CHAINS
    • B21L3/00—Making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces

Definitions

  • the present invention relates to a method of welding the links of a steel chain.
  • a grain-coarsening takes place in the material which primarily reduces the toughness.
  • the grain-coarsening depends mainly on the welding performance and on the analysis of the chain material.
  • the temperature should be as low as possible and the temperature-influenced zone should be as small as possible.
  • Nickel, in particular, in the link material improves the toughness of the welding zone. Alloying elements, however, make the steel considerably more expensive, and advantages from those additives can be derived only in the temperature- influenced zone and, in particular, in the area closest to the joint where the welding temperature is at its maximum. In other parts of the link, a cheaper steel could be used.
  • the welding process is as follows: electric electrodes are connected to both sides of the link ends, a suitable gap for starting the arc is adjusted between the link ends and, when there is an arc, the gap is widened until the desired arc appearance is reached. When the ends have received intended welding temperature, the ends are compressed so that the joint form a bead. The zone influenced by the high temperature during the welding is rather extended.
  • the link material 1 should be cut into somewhat shorter lengths than conventionally, so that an insert 5 with about the same diameter as the link material 1 can fit into the gap between the end surfaces 4 of the link material 1.
  • the insert 5 is a uniform cylinder, whose length between the end surfaces suitably is between about half the insert diameter and one and a half times the insert diameter. It could also have a smaller length.
  • the analysis of the insert 5 should contain toughness increasing alloying elements, e.g. nickel so that, during the welding, such alloying elements will be added to a sufficient extent to the zones affected by the high temperatures in the end surfaces 4 of the link material 1. In this way, one will have a desired structure in the most exposed zone without having to alloy all the link material higher.
  • friction welding proceeds as usual by the rotation of the insert 5 while the surfaces are under a suitable pressure.
  • the friction of the surfaces between the insert 5 and the link material 1 will bring about desired temperature and then the surfaces should be put under further pressure.
  • friction welding has the great advantage of reducing considerably the zone of link material 1 affected by the high temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

In order to get a chain link of increased fracture toughness in the welding zone, the link material (1) is friction welded to an insert (5) of about the same diameter as the link by rotation of the insert (5) between the ends (4) of the link material (1). The insert (5) is of high graded material.

Description

A METHOD OF WELDING THE LINKS OF A CHAIN.
The present invention relates to a method of welding the links of a steel chain.
It is a common knowledge that the weakest point of a chain is the weld between the rod ends of the link which are bent together. The conventional joining methods are flash welding or resistance butt welding; SE-A 331 623 describes such well-known methods.
In the zone affected by the high temperature developed during the welding, a grain-coarsening takes place in the material which primarily reduces the toughness. The grain-coarsening depends mainly on the welding performance and on the analysis of the chain material. During the welding the temperature should be as low as possible and the temperature-influenced zone should be as small as possible. Nickel, in particular, in the link material improves the toughness of the welding zone. Alloying elements, however, make the steel considerably more expensive, and advantages from those additives can be derived only in the temperature- influenced zone and, in particular, in the area closest to the joint where the welding temperature is at its maximum. In other parts of the link, a cheaper steel could be used. Surprisingly, it appears now that one can increase the toughness in the weld by using friction welding; a method known from DE-OS 2915418. In that connection, the invention has been given the characteristics stated in the claims. The invention will be described more in detail by means of the enclosed drawing that, in a side view, show a chain link in production before being welded. A conventional way of making a steel chain will be described briefly. One cuts the link material 1 into suitable lengths, bends it into an oval shape so that the ends of the link material will coincide along one of the sides of the link. During this process one should also hook the link into the adjacent link already welded. The welding process is as follows: electric electrodes are connected to both sides of the link ends, a suitable gap for starting the arc is adjusted between the link ends and, when there is an arc, the gap is widened until the desired arc appearance is reached. When the ends have received intended welding temperature, the ends are compressed so that the joint form a bead. The zone influenced by the high temperature during the welding is rather extended.
According to this invention, the link material 1 should be cut into somewhat shorter lengths than conventionally, so that an insert 5 with about the same diameter as the link material 1 can fit into the gap between the end surfaces 4 of the link material 1. The insert 5 is a uniform cylinder, whose length between the end surfaces suitably is between about half the insert diameter and one and a half times the insert diameter. It could also have a smaller length. The analysis of the insert 5 should contain toughness increasing alloying elements, e.g. nickel so that, during the welding, such alloying elements will be added to a sufficient extent to the zones affected by the high temperatures in the end surfaces 4 of the link material 1. In this way, one will have a desired structure in the most exposed zone without having to alloy all the link material higher. Then, the friction welding proceeds as usual by the rotation of the insert 5 while the surfaces are under a suitable pressure. The friction of the surfaces between the insert 5 and the link material 1 will bring about desired temperature and then the surfaces should be put under further pressure. Compared with flash welding, friction welding has the great advantage of reducing considerably the zone of link material 1 affected by the high temperature.

Claims

Method of welding the links of a steel chain c h a r a c t e r i z e d in that a steel insert (5) having substantially the same diameter as the link and containing toughness increasing alloying elements is placed between the end surfaces (4) of the link (1) and rotated so as to be friction welded to the two end surfaces (4) of the link material.
PCT/SE1986/000459 1985-10-08 1986-10-08 A method of welding the links of a chain WO1987002283A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO872336A NO872336L (en) 1985-10-08 1987-06-03 PROCEDURE FOR AA WELDING LINKS IN A CHAIN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8504645A SE455273B (en) 1985-10-08 1985-10-08 MAKE FRICTION WELDING TO THE LINKS IN A STALKETTING
SE8504645-6 1985-10-08

Publications (1)

Publication Number Publication Date
WO1987002283A1 true WO1987002283A1 (en) 1987-04-23

Family

ID=20361656

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000459 WO1987002283A1 (en) 1985-10-08 1986-10-08 A method of welding the links of a chain

Country Status (3)

Country Link
JP (1) JPS63501778A (en)
SE (1) SE455273B (en)
WO (1) WO1987002283A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080289A1 (en) * 2007-12-20 2009-07-02 Pewag Austria Gmbh Method for producing welded round and profile chains, chain links for a round or profile chain and round or profile chain made of chain links of said kind

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110896A1 (en) * 2000-03-24 2001-10-31 Luk Lamellen & Kupplungsbau Chain belt for variable cone-pulley vehicle transmissions includes retainer elements attached to the links and coupling members by a welded bond
ES2586139T3 (en) * 2011-03-07 2016-10-11 Pewag Austria Gmbh Chain composed of oval profiled links and manufacturing procedure
JP7286912B2 (en) * 2016-12-15 2023-06-06 東ソー株式会社 Allophanate group-containing polyisocyanate prepolymer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE331623B (en) * 1967-05-30 1971-01-04 Meyer Roth Pastor Maschf
US3771706A (en) * 1971-09-07 1973-11-13 Us Army Apparatus for welding by translational friction
DE2915418A1 (en) * 1979-04-17 1980-10-30 Siemens Ag Dissimilar metal welding - by friction welding followed by diffusion welding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE331623B (en) * 1967-05-30 1971-01-04 Meyer Roth Pastor Maschf
US3771706A (en) * 1971-09-07 1973-11-13 Us Army Apparatus for welding by translational friction
DE2915418A1 (en) * 1979-04-17 1980-10-30 Siemens Ag Dissimilar metal welding - by friction welding followed by diffusion welding

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. 86-105647/16; & SU,A,1181828. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080289A1 (en) * 2007-12-20 2009-07-02 Pewag Austria Gmbh Method for producing welded round and profile chains, chain links for a round or profile chain and round or profile chain made of chain links of said kind
US8186141B2 (en) 2007-12-20 2012-05-29 Technische Universitaet Graz Method for producing welded round and profile chains, chain links for a round or profile chain and round or profile chain made of chain links of said kind

Also Published As

Publication number Publication date
JPS63501778A (en) 1988-07-21
SE8504645L (en) 1987-04-09
SE455273B (en) 1988-07-04
SE8504645D0 (en) 1985-10-08

Similar Documents

Publication Publication Date Title
WO1987002283A1 (en) A method of welding the links of a chain
CA1048793A (en) Heavy-duty offshore stud chain link
US4266119A (en) Hairpin-type electric resistance heating element
ES8104927A1 (en) Method of reconditioning a worn chain link.
SU939183A2 (en) Saw frame sonnecting rod
SU1703323A1 (en) Method of manufacturing permanent joint
SU1168618A1 (en) Method of producing strips
GB533269A (en) Improvements in, and in the manufacture of, chains
JPS5750235A (en) Manufacture of link chain
US4330908A (en) Hairpin-type electric resistance heating element making
SU1620246A2 (en) Method of projection resistance welding
NO872336L (en) PROCEDURE FOR AA WELDING LINKS IN A CHAIN.
IT1174159B (en) METHOD FOR THE MANUFACTURE OF FOLDED STEEL PIPES, PRESENTING A MECHANICAL STRENGTH AND EXCELENT LOW TEMPERATURE TENACITY
US3498050A (en) Method and apparatus for producing a round-link chain
EP0107218A1 (en) Process for the manufacture of endless metal bands
SU785050A1 (en) Method of butt welding of thermoplastic tubes
SU1058735A1 (en) Machine for butt resistance welding of chain links
SU1461603A1 (en) Method of resistance butt flash welding with initial heating
SU1622101A1 (en) Method of projection resistance welding
JPS5630087A (en) Gas pressure welding method for steel bar for reinforced concrete
GB2137948A (en) Improvements in or Relating to Flat Wire Conveyor Belts
RU1834773C (en) Method for welding inner longitudinal seams of pipes
DE3672753D1 (en) BULB CORE.
SU442632A1 (en) Method of tube production
SU785002A1 (en) Optronic charge-over switch

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE