EP1262258A3 - Method for upsetting an end of a steel bar - Google Patents

Method for upsetting an end of a steel bar Download PDF

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Publication number
EP1262258A3
EP1262258A3 EP02076777A EP02076777A EP1262258A3 EP 1262258 A3 EP1262258 A3 EP 1262258A3 EP 02076777 A EP02076777 A EP 02076777A EP 02076777 A EP02076777 A EP 02076777A EP 1262258 A3 EP1262258 A3 EP 1262258A3
Authority
EP
European Patent Office
Prior art keywords
bar
boss
towards
mould
starting
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.)
Withdrawn
Application number
EP02076777A
Other languages
German (de)
French (fr)
Other versions
EP1262258A2 (en
Inventor
Kari Viljakainen
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.)
Tartuntamarkkinointi Oy
Original Assignee
Tartuntamarkkinointi Oy
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 Tartuntamarkkinointi Oy filed Critical Tartuntamarkkinointi Oy
Publication of EP1262258A2 publication Critical patent/EP1262258A2/en
Publication of EP1262258A3 publication Critical patent/EP1262258A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • B21J9/08—Swaging presses; Upsetting presses equipped with devices for heating the work-piece

Abstract

1. Method for making an expansion formed at the end of metal bars (1) of steel, such as a conical expansion (10) formed at the end of concrete anchors, in which method
  • the end portion (4) of a bar (1) is heated in a controlled manner by starting the heating from a point (6) of said portion (4) opposite to the bar end (5) and increasing the heating to a temperature rising towards the end (5) of the bar, and
  • the heated bar (1) is locked immovably in place and it is compressed from the bar end (5) disposed at a distance from a mould/boss (2), starting with a press plate (3) or a similar pressing element towards the mould/boss (2), thus causing, due to the temperature differences occurring between different parts (5, 6) of the end portion of the bar, an upsetting process to begin from the hotter end (5) of the bar (1) and to advance towards the bar portion (6) of falling temperature, especially creating conditions for optimal shaping of the end portion (4) of the bar.
EP02076777A 2001-05-11 2002-05-08 Method for upsetting an end of a steel bar Withdrawn EP1262258A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20010994A FI20010994A (en) 2001-05-11 2001-05-11 Method for making an extension to the end of a steel bar
FI20010994 2001-05-11

Publications (2)

Publication Number Publication Date
EP1262258A2 EP1262258A2 (en) 2002-12-04
EP1262258A3 true EP1262258A3 (en) 2003-05-02

Family

ID=8561179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02076777A Withdrawn EP1262258A3 (en) 2001-05-11 2002-05-08 Method for upsetting an end of a steel bar

Country Status (2)

Country Link
EP (1) EP1262258A3 (en)
FI (1) FI20010994A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960946C (en) * 1955-07-15 1957-03-28 Hasenclever Ag Maschf Method and device for electro upsetting of workpiece heads
US3396567A (en) * 1964-12-04 1968-08-13 Hasenclever A G Maschf Apparatus for the heading of conductive workpieces
US3487196A (en) * 1966-02-10 1969-12-30 Hasenclever Ag Maschf Die for electrical upsetting
FR2220328A1 (en) * 1973-03-07 1974-10-04 Inst Obrobki Plastycznes
US3842644A (en) * 1972-04-24 1974-10-22 Elphiac Sa Method of contracting or compressing,machine for performing the method and articles produced according to the method
US5660594A (en) * 1992-06-01 1997-08-26 Tartuntamarkkinointi Oy Method of making a threaded connection for reinforcing bars
DE19719578A1 (en) * 1996-06-27 1998-01-02 Davum Construction S A Prefabricated concrete reinforcing rod manufacturing method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960946C (en) * 1955-07-15 1957-03-28 Hasenclever Ag Maschf Method and device for electro upsetting of workpiece heads
US3396567A (en) * 1964-12-04 1968-08-13 Hasenclever A G Maschf Apparatus for the heading of conductive workpieces
US3487196A (en) * 1966-02-10 1969-12-30 Hasenclever Ag Maschf Die for electrical upsetting
US3842644A (en) * 1972-04-24 1974-10-22 Elphiac Sa Method of contracting or compressing,machine for performing the method and articles produced according to the method
FR2220328A1 (en) * 1973-03-07 1974-10-04 Inst Obrobki Plastycznes
US5660594A (en) * 1992-06-01 1997-08-26 Tartuntamarkkinointi Oy Method of making a threaded connection for reinforcing bars
DE19719578A1 (en) * 1996-06-27 1998-01-02 Davum Construction S A Prefabricated concrete reinforcing rod manufacturing method

Also Published As

Publication number Publication date
FI20010994A (en) 2002-11-12
EP1262258A2 (en) 2002-12-04
FI20010994A0 (en) 2001-05-11

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