WO1998022674A1 - Method for manufacturing a lattice structure - Google Patents

Method for manufacturing a lattice structure Download PDF

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Publication number
WO1998022674A1
WO1998022674A1 PCT/FI1997/000709 FI9700709W WO9822674A1 WO 1998022674 A1 WO1998022674 A1 WO 1998022674A1 FI 9700709 W FI9700709 W FI 9700709W WO 9822674 A1 WO9822674 A1 WO 9822674A1
Authority
WO
WIPO (PCT)
Prior art keywords
booms
slits
pipe
diagonal braces
sheet
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.)
Ceased
Application number
PCT/FI1997/000709
Other languages
French (fr)
Inventor
Pauli LAMMINMÄKI
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.)
Laserplus Oy
Original Assignee
Laserplus 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
Priority claimed from FI964630A external-priority patent/FI100904B/en
Priority claimed from FI972715A external-priority patent/FI972715A0/en
Application filed by Laserplus Oy filed Critical Laserplus Oy
Publication of WO1998022674A1 publication Critical patent/WO1998022674A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • E04C3/083—Honeycomb girders; Girders with apertured solid web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • B21D47/02—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars by expanding
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/043—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces

Definitions

  • the present invention relates to a method for manufacturing a lattice structure, said structure comprising at least two booms, made of a sheet-like material and tied together with diagonal braces.
  • the invention relates also to a method for manufacturing a hollow three-dimensional lattice structure, especially a lattice-structured girder, pole, or mast.
  • the method of the invention can be used for manufacturing a lattice structure from steel or or some other material possessing remarkable toughness.
  • the structure can be flat or three-dimensional.
  • a conventional way of manufacturing lattice structures is that the most-stressed components of the structure, e.g. in the case of a horizontal girder, the top and bottom boom thereof, are tied together with diagonal braces, which have been manufactured in separate pieces and then connected to the booms and possibly to each other, e.g. by welding.
  • An object of the invention is to provide a manufacturing method, wherein all the components of a lattice structure, namely the booms and the diagonal braces therebetween, can be manufactured from the same material without joints.
  • fig. 1 shows a blank for manufacturing a lattice-structured girder
  • fig. 2 shows a finished lattice-structured girder manufactured by means of a method of the invention.
  • Fig. 1 depicts a tubular blank 1, used in the manufacture of a girder and provided with plate-like walls.
  • the opposite walls of the blank 1 are provided with slits 2, the number, length, and relative disposition thereof being selected in view of diagonal braces 4 to be formed.
  • the diagonal braces 4 and booms 3 visible in fig. 2 are manufactured from a single blank 1 in such a way that there are no welding joints at crossing points 5 of the diagonal braces and at junctions 6 between the same and the booms.
  • the diagonal braces 4 shall stretch to an extent sufficient for achieving a desired cross-sectional dimensioning for the girder.
  • the direction and positioning of the slits 2 is such that, at the stretching stage of the blank 1, the diagonal braces 4 must develop neither flattening nor bending.
  • the boom members 3 extend longitudinally of the structure and are made of a continuous sheet material.
  • An essential feature in the invention is that the slits 2 between the booms 3 are made first and then the entire sheet section between the booms is stretched in a single operation. During the stretching, the plane of the diagonal braces remains substantially coincident with the original plane of the sheet.
  • a flat lattice structure can be manufactured in the same way as the lattice-structured side of a square girder as shown in fig. 2.
  • the lists 2 are provided on desired sides and, respectively, the stretching of a blank is effected in different directions.
  • the method of the invention can be used e.g. for manufacturing tapered or conical girders, poles, or masts.
  • the extent of stretching is unequal in different parts of the lattice structure.
  • the sizing of slits may vary even in one and the same lattice structure, e.g. in such a manner that the lengths, distances thereof and/or the number of adjacent slits are different in various lateral and longitudinal sections of the structure.
  • the invention offers essential benefits over the prior known lattice structures. There is no need for welding joints and the structural variation is easy.
  • the method also improves the exploitation of the properties of a material through shape-strengthening and, thus, lightens the structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The invention relates to a method for manufacturing a flat or three-dimensional lattice structure. The structure comprises at least two booms (3), made of a sheet-like material and tied together with diagonal braces (4). The sheet material of a bank (1) extending between the booms is cut to provide it with slits (2) substantially parallel to the booms (3) and the booms are distanced from each other, whereby the sections between the slits (2) turn and stretch into the diagonal braces (4) connecting the booms (3).

Description

Method for manufacturing a lattice structure
The present invention relates to a method for manufacturing a lattice structure, said structure comprising at least two booms, made of a sheet-like material and tied together with diagonal braces.
The invention relates also to a method for manufacturing a hollow three-dimensional lattice structure, especially a lattice-structured girder, pole, or mast.
The method of the invention can be used for manufacturing a lattice structure from steel or or some other material possessing remarkable toughness. The structure can be flat or three-dimensional.
A conventional way of manufacturing lattice structures is that the most-stressed components of the structure, e.g. in the case of a horizontal girder, the top and bottom boom thereof, are tied together with diagonal braces, which have been manufactured in separate pieces and then connected to the booms and possibly to each other, e.g. by welding.
An object of the invention is to provide a manufacturing method, wherein all the components of a lattice structure, namely the booms and the diagonal braces therebetween, can be manufactured from the same material without joints.
As for flat structures, this object is achieved on the basis of the characterizing features set forth in the appended claim 1 and, as for three-dimensional structures, on the basis of the characterizing features set forth in the appended claim 2. The non-independent claims define preferred embodiments for a three-dimensional lattice structure.
One exemplary embodiment of the invention will now be described in more detail with reference made to the accom- panying drawing, in which
fig. 1 shows a blank for manufacturing a lattice-structured girder and
fig. 2 shows a finished lattice-structured girder manufactured by means of a method of the invention.
Fig. 1 depicts a tubular blank 1, used in the manufacture of a girder and provided with plate-like walls. The opposite walls of the blank 1 are provided with slits 2, the number, length, and relative disposition thereof being selected in view of diagonal braces 4 to be formed. Thus, the diagonal braces 4 and booms 3 visible in fig. 2 are manufactured from a single blank 1 in such a way that there are no welding joints at crossing points 5 of the diagonal braces and at junctions 6 between the same and the booms. This has been made possibly by means of the slits 2 cut in the blank 1 , which are disposed in such an arrangement that, as the blank 1 is stretched from the booms 3 in a direction substantially perpendicular to the slits 2, the diagonal braces 4 shall stretch to an extent sufficient for achieving a desired cross-sectional dimensioning for the girder. Hence, the direction and positioning of the slits 2 is such that, at the stretching stage of the blank 1, the diagonal braces 4 must develop neither flattening nor bending.
The boom members 3 extend longitudinally of the structure and are made of a continuous sheet material. An essential feature in the invention is that the slits 2 between the booms 3 are made first and then the entire sheet section between the booms is stretched in a single operation. During the stretching, the plane of the diagonal braces remains substantially coincident with the original plane of the sheet.
A flat lattice structure can be manufactured in the same way as the lattice-structured side of a square girder as shown in fig. 2.
In three-dimensional elements, the lists 2 are provided on desired sides and, respectively, the stretching of a blank is effected in different directions.
The method of the invention can be used e.g. for manufacturing tapered or conical girders, poles, or masts. Thus, the extent of stretching is unequal in different parts of the lattice structure. Likewise, the sizing of slits may vary even in one and the same lattice structure, e.g. in such a manner that the lengths, distances thereof and/or the number of adjacent slits are different in various lateral and longitudinal sections of the structure.
The invention offers essential benefits over the prior known lattice structures. There is no need for welding joints and the structural variation is easy. The method also improves the exploitation of the properties of a material through shape-strengthening and, thus, lightens the structure.

Claims

Claims
1. A method for manufacturing a lattice structure, said structure comprising at least two booms (3), made of a sheet-like material and tied together with diagonal braces (4), characterized in that the sheet material of a blank (1) extending between the booms (3) is cut to provide it with slits (2) substantially parallel to the booms (3) and the booms (3) are distanced from each other, whereby the sections between the slits (2) turn and stretch into the diagonal braces (4) connecting the booms (3).
2. a method for manufacturing a hollow three-dimensional lattice structure, especially a lattice-structured girder, pole, or mast, said structure comprising at least two booms (3), made of a sheet-like material and tied together with diagonal braces (4), characterized in that a pipe (1) of a sheet-like material is provided with slits (2), extending substantially lengthwise of the pipe, and the pipe members ( 3 ) on the opposite sides of the slits are distanced from each other, the sections between the slits (2) turning and stretching into the diagonal braces (4), connecting the boom members (3) consisting of a sheet material integral therewith .
3. A method as set forth in claim 2, characterized in that the slits (2) are made in the opposite sides of a square pipe and the other two sides of the pipe (1) are distanced to a sufficient extent for achieving a desired dimensioning for the structure.
4. A method as set forth in claim 2 or 3, characterized in that the pipe members are distanced to the extent that varies over the various lengthwise sections of the pipe (1) for producing a tapered girder, pole, or mast.
5. A method as set forth in any of claims 2-4, characterized in that the sizing of the slits (2) varies in various parts of the pipe blank,
PCT/FI1997/000709 1996-11-20 1997-11-20 Method for manufacturing a lattice structure Ceased WO1998022674A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI964630 1996-11-20
FI964630A FI100904B (en) 1996-11-20 1996-11-20 The trap of a double-slab thermally insulated building element and the method of making it
FI972715 1997-06-24
FI972715A FI972715A0 (en) 1997-06-24 1997-06-24 Foerfarande Foer framstaellning av en fackverkkonstruktion

Publications (1)

Publication Number Publication Date
WO1998022674A1 true WO1998022674A1 (en) 1998-05-28

Family

ID=26160256

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000709 Ceased WO1998022674A1 (en) 1996-11-20 1997-11-20 Method for manufacturing a lattice structure

Country Status (1)

Country Link
WO (1) WO1998022674A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042582A1 (en) * 1999-12-07 2001-06-14 Dallan S.R.L. Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method
WO2004013423A2 (en) 2002-08-05 2004-02-12 Anderson Jeffrey A Metal framing member and method of manufacture
CN109420721A (en) * 2017-08-22 2019-03-05 宝山钢铁股份有限公司 A kind of processing method of unilateral side variable cross-section automotive frame
CN111482776A (en) * 2019-05-31 2020-08-04 成都辟思航空科技有限公司 Integral lattice column processing device
CN111673389A (en) * 2020-06-18 2020-09-18 成都辟思航空科技有限公司 Integral lattice column processing equipment and method
US12552653B2 (en) 2020-03-06 2026-02-17 Oshkosh Corporation Boom assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108406A (en) * 1959-08-03 1963-10-29 Jerome J Ellis Construction members and methods of forming same
US3763616A (en) * 1970-11-06 1973-10-09 Romolo Pastorelli Structural unit having an expanded metal sheet and method for manufacturing the structural unit
US3812558A (en) * 1970-04-30 1974-05-28 H Watanabe Method and apparatus for manufacturing expanded structural members and its products
US3861009A (en) * 1973-05-03 1975-01-21 Modco International Inc Process and apparatus for forming structural members
AT369479B (en) * 1980-12-02 1983-01-10 Hulek Anton Lattice mast
US4513551A (en) * 1982-05-12 1985-04-30 Ulf Gauffin Structural support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108406A (en) * 1959-08-03 1963-10-29 Jerome J Ellis Construction members and methods of forming same
US3812558A (en) * 1970-04-30 1974-05-28 H Watanabe Method and apparatus for manufacturing expanded structural members and its products
US3763616A (en) * 1970-11-06 1973-10-09 Romolo Pastorelli Structural unit having an expanded metal sheet and method for manufacturing the structural unit
US3861009A (en) * 1973-05-03 1975-01-21 Modco International Inc Process and apparatus for forming structural members
AT369479B (en) * 1980-12-02 1983-01-10 Hulek Anton Lattice mast
US4513551A (en) * 1982-05-12 1985-04-30 Ulf Gauffin Structural support

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042582A1 (en) * 1999-12-07 2001-06-14 Dallan S.R.L. Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method
WO2004013423A2 (en) 2002-08-05 2004-02-12 Anderson Jeffrey A Metal framing member and method of manufacture
CN109420721A (en) * 2017-08-22 2019-03-05 宝山钢铁股份有限公司 A kind of processing method of unilateral side variable cross-section automotive frame
CN111482776A (en) * 2019-05-31 2020-08-04 成都辟思航空科技有限公司 Integral lattice column processing device
CN111576737A (en) * 2019-05-31 2020-08-25 成都辟思航空科技有限公司 Integral type non-welding latticed column
CN111576737B (en) * 2019-05-31 2022-01-18 成都辟思航空科技有限公司 Integral type non-welding latticed column
CN111482776B (en) * 2019-05-31 2022-06-03 成都辟思航空科技有限公司 Integral lattice column processing device
US12552653B2 (en) 2020-03-06 2026-02-17 Oshkosh Corporation Boom assembly
CN111673389A (en) * 2020-06-18 2020-09-18 成都辟思航空科技有限公司 Integral lattice column processing equipment and method
CN111673389B (en) * 2020-06-18 2022-04-12 成都辟思航空科技有限公司 Integral lattice column processing equipment and method

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