EP2552618A1 - A method for manufacturing perforated pieces of plate or strip material used in the construction industry and a piece manufactured by the method - Google Patents

A method for manufacturing perforated pieces of plate or strip material used in the construction industry and a piece manufactured by the method

Info

Publication number
EP2552618A1
EP2552618A1 EP11713937A EP11713937A EP2552618A1 EP 2552618 A1 EP2552618 A1 EP 2552618A1 EP 11713937 A EP11713937 A EP 11713937A EP 11713937 A EP11713937 A EP 11713937A EP 2552618 A1 EP2552618 A1 EP 2552618A1
Authority
EP
European Patent Office
Prior art keywords
hole
strip material
piece
strip
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.)
Withdrawn
Application number
EP11713937A
Other languages
German (de)
French (fr)
Inventor
Raimo A Komaro
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP2552618A1 publication Critical patent/EP2552618A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B1/2612—Joist hangers
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B2001/2644—Brackets, gussets or joining plates
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B2001/2696—Shear bracing

Definitions

  • the invention relates to perforated pieces of metal sheet or strip material used in the construction industry, such as, for example, manufacturing nailing plates, wind brace collars, and beam shoes. More precisely the invention relates to a method for manufacturing such plate or strip pieces, especially manufacturing in connection with forming the holes to be made in the piece, as well as the perforated piece manufactured by such a method.
  • perforated piece of sheet metal or strip material used in the construction industry is meant here pieces whose thickness is essentially smaller than the width and which are provided with holes for attachment of the pieces in guestion.
  • An example of such pieces is wind brace collars, which are used in construction technology to support and stiffen various structures, especially roof structures.
  • Another example of such pieces is nailing plates, which can be straight or bent into an angle and are used, for example, as corner joints in roof structures.
  • a third example of such pieces is beam shoes, which are used at joining points of beams .
  • Nailing plates which can thus be straight or bent into an angle and possibly reinforced, are manufactured from metal plates, the material thickness of which usually varies between 2.0 and 3.0 mm. Nailing plates are provided with several holes through which the nailing plates can be attached with nails, screws, or other similar devices.
  • Beam shoes are usually manufactured by bending sheet metal 2.0-3.0 mm thick, and they are provided with several holes for attaching the beam shoes with nails, screws, etc.
  • wind braces is the wind brace collar, which is usually formed from a long metal strip or piece of sheet metal that can be cut into lengths suitable for various installation sites, which strip is provided with holes along the entire length of the strip. Through these holes, the ends of wind brace collars are attached to the support structure or other attachment point, usually intermediate pieces, such as wind braces. In addition, a break is often formed along the length of the wind brace collar, to which break an adjustment tightening piece is fitted, by means of which the tension of the wind brace collar can be regulated. Attachment of the wind brace collar to an intermediate piece is realized through holes in the wind brace collar, for example as a screw joint.
  • wind brace collar strip The width of a wind brace collar strip is typically 25- 80 mm, and its thickness is usually about 2.0-3.0 mm. Wind brace collar strips are usually delivered wound into a coil, in which case the length of the strip is usually 25-50 m.
  • the most commonly used 25-meter coil of a wind brace collar (thickness 2 mm and width 50 mm) weighs about 16 kg, and a 50-meter coil about 32 kg.
  • a problem in these known wind brace collars is the difficulty of handling the wind brace collar strip.
  • a wind brace collar strip wound into a coil is heavy for the installer to carry to the installation place, usually the roof structure of a building.
  • unpacking and straightening a wind brace collar strip is awkward, due to the thickness of the strip.
  • the holes are formed in a metal piece including a perforated plate or strip part for use in the construction industry in such a way that a depression is first pressed into the plate or strip material with a punch-type tool, at which time, the sharp point of the punch simultaneously splits the bottom of the depression formed, thus forming an initial hole.
  • the strip or plate material is folded in the depression formed at the edges of the initial hole to form the final hole.
  • the strip or plate material folded at the edges of the hole is pressed against the strip.
  • the direction of the split in the depression forming at the start of making the hole is advantageously in the direction of the most central load direction of the piece being formed, in which case, the strip or plate material folded at both edges of the hole reinforces the piece being formed in the load direction.
  • the structure of the piece being formed advantageously compared to a piece manufactured in the usual way, because in the material part of the plate or strip material the material formerly removed in connection with producing the holes is now left at the edges of the hole.
  • the folded strip or plate material is strain hardened as it is folded and pressed, which further strengthens the piece according to the invention.
  • the solution according to the invention makes it possible to achieve, among other things, the strength of usual wind brace collars with a thinner material thickness, in which case material savings and thereby cost savings are achieved in manufacturing.
  • thinner wind brace collars are easier to handle for the installers and easier to straighten after being taken from a coil for installation.
  • Strengthening the structure of the piece and the possibility of using thinner material thicknesses to meet the reguirements set for use also concerns other perforated pieces of plate or strip parts.
  • the method according to the invention is more precisely characterized by what is presented in the characterizing part of claim 1, and the piece according to the invention is characterized by what is presented in the characterizing part of claim 6.
  • Figures 1A and IB show schematically two pieces of a usual wind brace collar of different widths, as seen from above.
  • FIGS. 2A-C show schematically stages in the manufacturing of a wind brace collar according to the invention.
  • Figure 3 shows schematically a piece of a wind brace collar according to the invention from the side to which the material of the strip is folded in connection with forming the hole.
  • FIGs 1A and IB bits of two wind brace collars of different widths are shown schematically. From the figures, the structure of the wind collar braces can be seen well, which includes wind collar brace strips 1 and 2, and holes 3 and 4, which are formed at egual intervals in the strip, and are used to attach the wind brace collar in place.
  • FIGs 2A-2C the manufacturing process of a wind brace collar according to the invention is shown, especially the most central part from the viewpoint of the invention, in other words the part of forming the holes of the wind brace collar.
  • the material strip of the wind brace collar is shown, viewed both from above and from the side.
  • formation of a hole of the wind brace collar starts by pressing a depression 6 into the metal material strip 5 of the wind brace collar with a suitable punch (not shown), at which time the sharp tip of the punch simultaneously splits the slit 7 at the bottom of the depression.
  • the slit 7 formed in this way is preferably in the direction of the material strip, in which case the tips of the slit do not make it possible for the material strip 5 to tear in conseguence of loads in the length direction of the wind brace collar strip.
  • the edges of the slit 7 are next folded outward and, in the example of the diagram, downward, toward the edges of the hole being formed, for example by pressing the edges of the slit from upward with a punch of suitable diameter (not shown) . In this way, the edges of the slit 7 are forced to stretch and fold the material 8 of the depression 6 outward to the edges of the hole 9 being formed, as in the situation shown in Figure 2B.
  • FIG. 3 is shown a piece 10 of a wind brace strip at a location of a hole 11, from the side of the strip where the strip material 12 from the hole area is folded and finally pressed against the surface of the strip .
  • the folded strip material 12 strengthens the wind brace collar 10 at the edges of the hole 11.
  • the material 12 folded from the area of the hole 11 is at least partly strain hardened in connection with producing the hole, which also increase the strength of the wind brace collar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

A method for manufacturing a piece (1, 2, 10) including metal plate or strip material (5) used in the construction industry, in which method holes (3, 4, 9, 11) are formed in the metal plate or strip material (5) by pressing a depression into the plate or strip material (5) with a punch in the place where a hole is to be formed, at which time, the bottom of the depression is split simultaneously by the tip of the punch by folding strip material (5) in the direction of the depression from the edges of the slit formed in the plate or strip material (5) and from the ends of the material surrounding the hole. The invention also concerns a piece (1, 2, 10) manufactured by the method.

Description

A METHOD FOR MANUFACTURING PERFORATED PIECES OF PLATE OR STRIP MATERIAL USED IN THE CONSTRUCTION INDUSTRY AND A PIECE MANUFACTURED BY THE METHOD
The invention relates to perforated pieces of metal sheet or strip material used in the construction industry, such as, for example, manufacturing nailing plates, wind brace collars, and beam shoes. More precisely the invention relates to a method for manufacturing such plate or strip pieces, especially manufacturing in connection with forming the holes to be made in the piece, as well as the perforated piece manufactured by such a method.
By perforated piece of sheet metal or strip material used in the construction industry is meant here pieces whose thickness is essentially smaller than the width and which are provided with holes for attachment of the pieces in guestion. An example of such pieces is wind brace collars, which are used in construction technology to support and stiffen various structures, especially roof structures. Another example of such pieces is nailing plates, which can be straight or bent into an angle and are used, for example, as corner joints in roof structures. A third example of such pieces is beam shoes, which are used at joining points of beams .
Nailing plates, which can thus be straight or bent into an angle and possibly reinforced, are manufactured from metal plates, the material thickness of which usually varies between 2.0 and 3.0 mm. Nailing plates are provided with several holes through which the nailing plates can be attached with nails, screws, or other similar devices.
Beam shoes are usually manufactured by bending sheet metal 2.0-3.0 mm thick, and they are provided with several holes for attaching the beam shoes with nails, screws, etc.
Other pieces used in the construction industry that are made at least partly from sheet metal and are provided with holes in the metal area are, among other things, fork plates, bearing plates, concrete bonds, pillar shoes, and rafter slide rails.
One form of wind braces is the wind brace collar, which is usually formed from a long metal strip or piece of sheet metal that can be cut into lengths suitable for various installation sites, which strip is provided with holes along the entire length of the strip. Through these holes, the ends of wind brace collars are attached to the support structure or other attachment point, usually intermediate pieces, such as wind braces. In addition, a break is often formed along the length of the wind brace collar, to which break an adjustment tightening piece is fitted, by means of which the tension of the wind brace collar can be regulated. Attachment of the wind brace collar to an intermediate piece is realized through holes in the wind brace collar, for example as a screw joint.
The width of a wind brace collar strip is typically 25- 80 mm, and its thickness is usually about 2.0-3.0 mm. Wind brace collar strips are usually delivered wound into a coil, in which case the length of the strip is usually 25-50 m. The most commonly used 25-meter coil of a wind brace collar (thickness 2 mm and width 50 mm) weighs about 16 kg, and a 50-meter coil about 32 kg.
A problem in these known wind brace collars is the difficulty of handling the wind brace collar strip. A wind brace collar strip wound into a coil is heavy for the installer to carry to the installation place, usually the roof structure of a building. In addition, unpacking and straightening a wind brace collar strip is awkward, due to the thickness of the strip. These problems significantly slow down the installation process of a wind collar brace. According to the level of technology of these pieces presented above, the holes are formed in manufacturing by cutting strip material away from hole places to achieve the holes in the plate or strip portion of the piece .
In the solution according to the present invention, the holes are formed in a metal piece including a perforated plate or strip part for use in the construction industry in such a way that a depression is first pressed into the plate or strip material with a punch-type tool, at which time, the sharp point of the punch simultaneously splits the bottom of the depression formed, thus forming an initial hole. After this, advantageously in several work stages, the strip or plate material is folded in the depression formed at the edges of the initial hole to form the final hole. As the last stage of forming the hole, the strip or plate material folded at the edges of the hole is pressed against the strip.
In the solution according to the invention, the direction of the split in the depression forming at the start of making the hole is advantageously in the direction of the most central load direction of the piece being formed, in which case, the strip or plate material folded at both edges of the hole reinforces the piece being formed in the load direction.
With the solution according to the invention, it is possible to strengthen the structure of the piece being formed advantageously compared to a piece manufactured in the usual way, because in the material part of the plate or strip material the material formerly removed in connection with producing the holes is now left at the edges of the hole. In addition, the folded strip or plate material is strain hardened as it is folded and pressed, which further strengthens the piece according to the invention.
The solution according to the invention makes it possible to achieve, among other things, the strength of usual wind brace collars with a thinner material thickness, in which case material savings and thereby cost savings are achieved in manufacturing. In addition, thinner wind brace collars are easier to handle for the installers and easier to straighten after being taken from a coil for installation. Strengthening the structure of the piece and the possibility of using thinner material thicknesses to meet the reguirements set for use also concerns other perforated pieces of plate or strip parts. The method according to the invention is more precisely characterized by what is presented in the characterizing part of claim 1, and the piece according to the invention is characterized by what is presented in the characterizing part of claim 6.
In the following, the invention will be described as an example with reference to the attached figures, in which : Figures 1A and IB show schematically two pieces of a usual wind brace collar of different widths, as seen from above.
Figures 2A-C show schematically stages in the manufacturing of a wind brace collar according to the invention, and
Figure 3 shows schematically a piece of a wind brace collar according to the invention from the side to which the material of the strip is folded in connection with forming the hole.
In Figures 1A and IB, bits of two wind brace collars of different widths are shown schematically. From the figures, the structure of the wind collar braces can be seen well, which includes wind collar brace strips 1 and 2, and holes 3 and 4, which are formed at egual intervals in the strip, and are used to attach the wind brace collar in place.
In Figures 2A-2C, the manufacturing process of a wind brace collar according to the invention is shown, especially the most central part from the viewpoint of the invention, in other words the part of forming the holes of the wind brace collar. In the figures, the material strip of the wind brace collar is shown, viewed both from above and from the side. According to Figure 2A, formation of a hole of the wind brace collar starts by pressing a depression 6 into the metal material strip 5 of the wind brace collar with a suitable punch (not shown), at which time the sharp tip of the punch simultaneously splits the slit 7 at the bottom of the depression. The slit 7 formed in this way is preferably in the direction of the material strip, in which case the tips of the slit do not make it possible for the material strip 5 to tear in conseguence of loads in the length direction of the wind brace collar strip.
In forming the hole, the edges of the slit 7 are next folded outward and, in the example of the diagram, downward, toward the edges of the hole being formed, for example by pressing the edges of the slit from upward with a punch of suitable diameter (not shown) . In this way, the edges of the slit 7 are forced to stretch and fold the material 8 of the depression 6 outward to the edges of the hole 9 being formed, as in the situation shown in Figure 2B.
Finally, the material 8 folded from the area of the hole 9 is folded further outward with respect to the center axis of the hole 9, after which the material 8 is pressed tightly against the surface surrounding the hole in the wind brace strip 5. In Figure 3 is shown a piece 10 of a wind brace strip at a location of a hole 11, from the side of the strip where the strip material 12 from the hole area is folded and finally pressed against the surface of the strip .
In the example of Figure 3, the folded strip material 12 strengthens the wind brace collar 10 at the edges of the hole 11. In addition, the material 12 folded from the area of the hole 11 is at least partly strain hardened in connection with producing the hole, which also increase the strength of the wind brace collar.
From Figure 3, it can be seen that the amount of material folded at the point of the tips of the slit formed in the initial phase of producing the hole 11 in the strip 10 of the material 12 is small, and more material 12 is folded in the other edge areas of the hole 11. In this way, the amount of material 12 is maximized in the edges of the hole 11 that strengthen the wind brace collar strip 10 when it is loaded in the length direction. This can be defined, for example, in such a way that in the cross-section of the wind brace collar 10 passing through the hole 11 (in the width direction of the strip) there is more folded material 12 than in the slit passing through the hole (in the length direction of the strip) .
Although the invention has been described in the above explanation of the figures only in connection with manufacturing a wind brace collar, the manufacturing method according to the invention and the products according to the invention can be generalized simply in a way that is obvious to a person skilled in the field also to other joint or support pieces used in the construction industry that form pieces or include a perforated metal plate or strip portion.

Claims

Claims
1. A method for manufacturing a piece used in the construction industry comprising metal sheet or strip material, in which method, holes are formed in the metal sheet or strip material, characterized by forming the holes in the method by
- pressing with a punch a depression in the position of the hole to be formed in the sheet or strip material, whereby simultaneously splitting the bottom of the depression,
- folding the material from the edges and the ends of the split formed in the sheet or strip material in the direction of the depression in order to form the hole, and
- turning the sheet or strip material folded on the edge of the hole formed against the surface of the material surrounding the hole .
2. A method according to claim 1, characterized by implementing the folding of the sheet or strip material on the edges of the hole to be formed after splitting the bottom of the depression in several folding steps.
3. A method according to claim 1 or 2, characterized by pressing the material turned against the surface of the sheet or strip material in connection with forming the hole against the surface of the sheet or strip material surrounding the hole after turning of the material .
4. A method according to any of claims 1-3, characterized by turning more material turnable from the area of the hole onto the sides of the hole in relation to the main load direction of the piece being manufactured .
5. A method according to any of claims 1-4, characterized by the piece being manufactured being a wind brace collar, a nailing plate or a beam shoe.
6. A piece used in the construction industry comprising metal sheet or strip material, said sheet or strip material being provided with holes, characterized in that said piece comprises the material folded from the area of the hole in the edge areas of the holes of the sheet or strip material.
7. A piece according to claim 6, characterized in that there is more material folded in the edge areas of the holes of the sheet or strip material on the sides of the holes in relation to the main load direction of the piece being manufactured.
8. A piece according to claim 6 or 7, characterized in that said piece is a wind brace collar, a nailing plate or a beam shoe.
EP11713937A 2010-03-30 2011-03-30 A method for manufacturing perforated pieces of plate or strip material used in the construction industry and a piece manufactured by the method Withdrawn EP2552618A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20105322A FI20105322A7 (en) 2010-03-30 2010-03-30 Method for producing perforated sheet-like or strip-like pieces for use in the construction industry and piece produced by the method
PCT/US2011/030481 WO2011123511A1 (en) 2010-03-30 2011-03-30 A method for manufacturing perforated pieces of plate or strip material used in the construction industry and a piece manufactured by the method

Publications (1)

Publication Number Publication Date
EP2552618A1 true EP2552618A1 (en) 2013-02-06

Family

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EP11713937A Withdrawn EP2552618A1 (en) 2010-03-30 2011-03-30 A method for manufacturing perforated pieces of plate or strip material used in the construction industry and a piece manufactured by the method

Country Status (3)

Country Link
EP (1) EP2552618A1 (en)
FI (1) FI20105322A7 (en)
WO (1) WO2011123511A1 (en)

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BE742078A (en) * 1969-11-21 1970-05-04
JP3840714B2 (en) * 1996-12-10 2006-11-01 日産自動車株式会社 Hemming processing method and hemming processing apparatus
JP2002294749A (en) * 2001-03-30 2002-10-09 Kobelco Contstruction Machinery Ltd Guard material for construction machine, and method for producing the same
JP4113921B2 (en) * 2002-01-09 2008-07-09 新キャタピラー三菱株式会社 Method and apparatus for manufacturing anti-slip material in construction machine
US20040096269A1 (en) * 2002-11-20 2004-05-20 George Shahnazarian Joist hangers
CN201227802Y (en) * 2008-06-13 2009-04-29 常熟华联装璜工程有限责任公司 Hand-hold pliers body structure for mechanical coupling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011123511A1 *

Also Published As

Publication number Publication date
FI20105322A0 (en) 2010-03-30
FI20105322L (en) 2011-10-01
FI20105322A7 (en) 2011-10-01
WO2011123511A1 (en) 2011-10-06

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