EP3498392A1 - Starrer bogenrohling und verfahren zur herstellung davon - Google Patents

Starrer bogenrohling und verfahren zur herstellung davon Download PDF

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Publication number
EP3498392A1
EP3498392A1 EP17315012.9A EP17315012A EP3498392A1 EP 3498392 A1 EP3498392 A1 EP 3498392A1 EP 17315012 A EP17315012 A EP 17315012A EP 3498392 A1 EP3498392 A1 EP 3498392A1
Authority
EP
European Patent Office
Prior art keywords
cut
main portion
sheet blank
seam
length
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Withdrawn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
EP17315012.9A
Other languages
English (en)
French (fr)
Inventor
Jules Hermann Bonenfant
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.)
OVH SAS
Original Assignee
OVH SAS
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 OVH SAS filed Critical OVH SAS
Priority to EP17315012.9A priority Critical patent/EP3498392A1/de
Publication of EP3498392A1 publication Critical patent/EP3498392A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/06—Making hollow objects characterised by the structure of the objects folded objects
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
    • B21D39/032—Joining superposed plates by locally deforming without slitting or piercing by fitting a projecting part integral with one plate in a hole of the other plate
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/52—Making hollow objects characterised by the use of the objects boxes, cigarette cases, or the like

Definitions

  • the present technology relates to rigid sheet blanks for bending into a bent sheet component.
  • the metal sheet blank is made bendable by hand by the weakening cuts, the metal sheet blank can be accidentally bent in a wrong direction since a directionality that is conventionally provided by tools during bending is now absent.
  • bent sheet component resulting from bending the metal sheet blank can have a relatively low load bearing capacity, notably due to the presence of the weakening cuts.
  • Each of the at least one cut includes: a main portion that is elongated such as to extend along a direction parallel to the seam axis, the main portion having a first end and a second end; a first extension extending from the first end of the main portion and being generally perpendicular to the main portion; and a second extension extending from the second end of the main portion and being generally perpendicular to the main portion.
  • the first and second extensions extend on a same side of the main portion.
  • the rigid sheet blank is made of a metallic material.
  • the at least one cut includes a first cut and a second cut spaced apart from one another by an inter-cut segment of material.
  • the main portion of the first cut is collinear with the main portion of the second cut.
  • the first and second extensions of each of the first cut and the second cut extend toward a same one of the first and second sections.
  • At least one of the first cut and the second cut is adjacent an edge of the rigid sheet blank and is spaced from the edge of the rigid sheet blank by an edge segment of material.
  • the inter-cut segment of material and the edge segment of material form a hinge for bending the first and second sections of the rigid sheet blank relative to one another.
  • the rigid sheet blank is bendable about the seam axis by hand.
  • a length of the first extension is less than a length of the main portion, and a length of the second extension is less than the length of the main portion.
  • the length of the first extension is approximately the same as the length of the second extension.
  • a ratio of the length of the first extension over the length of the main portion is between 0.1 and 0.3.
  • a method for producing a hand-bendable rigid sheet blank includes providing a sheet of rigid material and forming a seam separating a first section of the sheet from a second section of the sheet adjacent to the first section.
  • Forming the seam includes cutting through the material of the sheet such as to produce at least one cut.
  • Each of the at least one cut includes: a main portion that is elongated such as to define a seam axis of the seam, the main portion having a first end and a second end; a first extension extending from the first end of the main portion and being generally perpendicular to the main portion; and a second extension extending from the second end of the main portion and being generally perpendicular to the main portion.
  • the first and second extensions extend on a same side of the main portion.
  • the material of the sheet is a metallic material.
  • cutting through the material of the sheet to produce the at least one cut includes: cutting through the material of the sheet to produce a first cut and cutting through the material of the sheet to produce a second cut spaced apart from the first cut by an inter-cut segment of material.
  • the main portion of the first cut is collinear with the main portion of the second cut.
  • the first and second extensions of each of the first cut and the second cut extend toward a same one of the first and second sections.
  • At least one of the first cut and the second cut is spaced adjacent an edge of the rigid sheet blank and is spaced from the edge of the rigid sheet blank by an edge segment of material.
  • the inter-cut segment of material and the edge segment of material form a hinge for bending the first and second sections relative to one another.
  • Implementations of the present technology each have at least one of the above-mentioned object and/or aspects, but do not necessarily have all of them. It should be understood that some aspects of the present technology that have resulted from attempting to attain the above-mentioned object may not satisfy this object and/or may satisfy other objects not specifically recited herein.
  • FIG 1 illustrates a rigid sheet blank 10 for bending into a bent sheet component 500 ( Figure 4 ).
  • the rigid sheet blank 10 is a flat piece of sheet that is cut from a sheet of rigid material.
  • the rigid sheet blank 10 is made of a metallic material, notably galvanized steel, and will thus be referred to as a metal sheet blank 10.
  • the metallic material of the metal sheet blank 10 could be any other suitable metallic material in other implementations (e.g., stainless steel, aluminum, etc.).
  • the sheet 10 could be made of a rigid material other than metallic material in alternative implementations (e.g., a polymeric material) so long as the material in question is bendable.
  • the metal sheet blank 10 can be cut from a metal sheet in various ways.
  • the metal sheet blank 10 is laser cut from the metal sheet by a laser cutting machine.
  • the metal sheet blank 10 may be cut in other ways in other examples (e.g., water jet cutting).
  • the metal sheet blank 10 has a right side section 14, a left side section 16, a rear side section 18, a front side section 20, a top side section 22 and a bottom side section 24 which are intended to be bent relative to one another to form the bent sheet component 500.
  • Each of the sections is shaped as desired to obtain the bent sheet component 500 once the metal sheet blank 10 is bent.
  • the right side section 14, the left side section 16 and the top side section 22 define cut-outs 26.
  • the metal sheet blank 10 has seams 30 separating adjacent ones of the sections 14, 16, 18, 20, 22, 24. More specifically, the seams 30 locally weaken the metal sheet blank 10 such as to facilitate bending of adjacent ones of the sections 14, 16, 18, 20, 22, 24 relative to one another. In particular, the seams 30 allow the metal sheet blank 10 to be bent by hand without using any implements (i.e., toollessly).
  • Each seam 30 extends along a seam axis 32 and includes at least one cut 34 through the material of the metal sheet blank 10.
  • the seam 30 between the right side section 14 and the bottom side section 24 includes three cuts 34, including two end cuts 34 E and one intermediate cut 34 I which are spaced apart from one another in a direction of the seam axis 32 by a pair of inter-cut material segments 36.
  • Each of the end cuts 34 E is located adjacent a peripheral edge 25 of the metal sheet blank 10 (which is formed by a peripheral edge 56 of each of the sections 14, 16, 18, 20, 22) and is spaced from the peripheral edge 25 by an edge material segment 45.
  • the inter-cut segments 36 and the edge segments 45 form a hinge for bending the right side section 14 and the bottom side section 24 relative to one another.
  • the seams 30 can include more or less than three cuts 34. As shown in Figure 1 , some of the seams 30 include four cuts 34. Moreover, it is contemplated that, in some implementations, the seams 30 could include a single cut 34.
  • each cut 34 is generally U-shaped and has a main portion 40 and a pair of extensions 42, 44 extending transversely to the main portion 40.
  • the main portion 40 is elongated such as to extend along a direction parallel to the seam axis 32 (e.g., collinear with the seam axis 32) from a first end 46 to a second end 48.
  • Each of the extensions 42, 44 extends from a respective one of the first and second ends 46, 48 and is generally perpendicular to the main portion 40 (i.e., within ⁇ 10° of being perpendicular to the main portion 40).
  • the extensions 42, 44 extend on a same side of the main portion 40 (i.e., pointing in the same direction) such that the cut 34 is U-shaped.
  • Each of the extensions 42, 44 has a length L E that is less than a length L M of the main portion 40. More specifically, in this implementation, the length L E of each of the extensions 42, 44 is approximately the same (e.g., within 10% of one another). In this example, a ratio of the length L E of a given one of the extensions 42, 44 over the length L M of the main portion 40 is between 0.1 and 0.3.
  • the main portions 40 of the cuts 34 of a given seam 30 are collinear.
  • the extensions 42, 44 of each of the cuts 34 of a given seam 30 extend toward a selected one of two of the sections 14, 16, 18, 20, 22, 24 which that seam 30 separates. For example, with respect to the seam 30 separating the right side section 14 from the bottom side section 24, the extensions 42, 44 of each cut 34 of that seam 30 extent toward the bottom side section 24.
  • the main portions 40 of the cuts 34 of a given seam 30 may be offset from one another and that the extensions 42, 44 of one or more of the cuts 34 of a given seam 30 could extend toward different ones of two of the sections 14, 16, 18, 20, 22, 24 which that seam 30 separates.
  • the configuration of the cuts 34 may allow a more time-efficient procedure for producing the metal sheet blank 10.
  • material being cut to form the cuts 34 may more easily fall from the sheet which saves the operator from having to intervene to detach portions of material stuck to the sheet.
  • the generally perpendicular orientation of the extensions 42, 44 relative to the main portion 40 causes the inter-cut segments 36 and the edge segments 45 to be relatively straight rectangular segments which allow the hinge formed by the inter-cut segments 36 and the edge segments 45 (or just the edge segments 45 if the seam 30 includes a single cut 34) to direct the bending and provide a proper bend about the seam axis 32.
  • the metal sheet blank 10 is provided with interlocking elements for interlocking certain ones of the sections 14, 16, 18, 20, 22, 24 with one another. More specifically, in this implementation, as shown in Figure 1 , the right side, rear side and top side sections 14, 18, 22 of the metal sheet blank 10 have tabs 50 A -50 E and the left side, rear side and top side sections 16, 18, 22 define openings 52 A -52 E for receiving respective ones of the tabs 50 A -50 E during bending of the metal sheet blank 10.
  • the tabs 50 A -50 E are inserted into corresponding ones of the openings 52 A -52 E (tab 50 A into opening 52 A , tab 50 B into opening 52 B and so on) and then bent to extend generally parallel to the given ones of the sections 14, 16, 18, 20, 22, 24 that comprise the corresponding ones of the openings 52 A -52 E .
  • This can increase the load bearing capacity of the resulting bent sheet component 500.
  • the tabs 50 A -50 E can be bent by hand and thus does not require specialized tooling or particularly experienced labour.
  • the tabs 50 A -50 E are configured to be bendable by hand such as to avoid using implements when bending the metal sheet blank 10 into the bent sheet component 500.
  • each tab 50 x has a length L T measured along an axis 54 of the tab 50 x (extending ce centrally and longitudinally of the tab 50 x ) that is greater than a width W T of the tab 50 x measured at an intersection of the tab 50 x with the peripheral edge 56 of a corresponding one of the sections 14, 16, 18, 20, 22.
  • a ratio L T /W T of the length L T of the tab 50 x over the width W T of the tab 50 x is between 2 and 5 inclusively. More specifically, in this example, the ratio L T /W T is between 3 and 4.
  • the length L T of the tab 50 x can be 10 mm and its width W T can be 3 mm.
  • each tab 50 x defines a cut 58 adjacent the peripheral edge 56 of the section comprising the tab 50 x in order to facilitate bending of the tab 50 x .
  • the cut 58 is square or rectangular and forms two segments on either side of the cut 58 that act as a hinge when the tab 50 x is bent.
  • the tabs 50 A -50 E are thus bendable by applying a relatively low force at an end portion 60 of each tab 50 x .
  • a force of less than or equal to 100 N applied by hand at the respective end portion 60 of the tabs 50 A -50 E is sufficient for bending the tabs 50 A -50 E .
  • the force applied by hand by an adult user is sufficient to bend the tabs 50 A -50 E .
  • some of the tabs 50 A -50 E are curved such as to be inserted into the corresponding openings 50 A -50 E without reducing the length of the tabs 50 A -50 E which facilitates their bending.
  • the tabs 50 A , 50 B of the right side section 14 are curved about an axis 70 ( Figure 3 ) that is normal to the metal sheet blank 10.
  • the tabs 50 A , 50 B have respective radii R A , R B measured from the axis 70 to the respective tab axes 54 of each of the tabs 50 A , 50 B .
  • each of the radius R A and the radius R B of the tab 50 B is between 5 mm and 60 mm.
  • the radius R A is between 5 mm and 10 mm.
  • a curvature of each of the tabs 50 A , 50 B of the right side section 14 is concentric with a bending radius 75 formed when the top side section 22 is bent about the seam axis 32.
  • the bending radius 75 and the curved tabs 50 A , 50 B have the same axis 70 (which can thus be referred to as a bend axis 70). This may facilitate insertion of the tabs 50 A , 50 B into the openings 52 A , 52 B when the top side section 22 is bent about the seam axis 32.
  • the tab 50 E of the rear side section 18 is curved about an axis normal to the metal sheet blank 10.
  • the tabs 50 C , 50 D of the top side section 22 are straight (i.e., not curved).
  • the left side, rear side and top side sections 16, 18, 22 have lobes 80 that form part of the peripheral edge 56 of each of these sections 16, 18, 22.
  • Each of the lobes 80 defines an outermost point of a respective edge of which that lobe 80 forms a part of and contains at least part of a respective one of the openings 52 A -52 E . This may facilitate insertion of the tabs 50 A -50 E into the openings 52 A -52 E .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP17315012.9A 2017-12-13 2017-12-13 Starrer bogenrohling und verfahren zur herstellung davon Withdrawn EP3498392A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17315012.9A EP3498392A1 (de) 2017-12-13 2017-12-13 Starrer bogenrohling und verfahren zur herstellung davon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17315012.9A EP3498392A1 (de) 2017-12-13 2017-12-13 Starrer bogenrohling und verfahren zur herstellung davon

Publications (1)

Publication Number Publication Date
EP3498392A1 true EP3498392A1 (de) 2019-06-19

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Application Number Title Priority Date Filing Date
EP17315012.9A Withdrawn EP3498392A1 (de) 2017-12-13 2017-12-13 Starrer bogenrohling und verfahren zur herstellung davon

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370069A (en) * 1976-12-02 1978-06-22 Nippon Electric Co Working method of electron panel fitting plate
WO2002013991A1 (en) * 2000-08-17 2002-02-21 Industrial Origami, Inc. Method for precision bending of a sheet of material and slit sheet therefor
DE20202100U1 (de) * 2002-02-13 2002-06-13 Fichtner Frank Zwei- oder dreidimensionaler gefalteter Körper
US20030037586A1 (en) * 2000-08-17 2003-02-27 Durney Max W. Method for precision bending of sheet of materials, slit sheets fabrication process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370069A (en) * 1976-12-02 1978-06-22 Nippon Electric Co Working method of electron panel fitting plate
WO2002013991A1 (en) * 2000-08-17 2002-02-21 Industrial Origami, Inc. Method for precision bending of a sheet of material and slit sheet therefor
US20030037586A1 (en) * 2000-08-17 2003-02-27 Durney Max W. Method for precision bending of sheet of materials, slit sheets fabrication process
DE20202100U1 (de) * 2002-02-13 2002-06-13 Fichtner Frank Zwei- oder dreidimensionaler gefalteter Körper

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