EP0736348A1 - Stegkettenglieder, Verfahren und Vorrichtung zu seiner Herstellung - Google Patents

Stegkettenglieder, Verfahren und Vorrichtung zu seiner Herstellung Download PDF

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Publication number
EP0736348A1
EP0736348A1 EP96490019A EP96490019A EP0736348A1 EP 0736348 A1 EP0736348 A1 EP 0736348A1 EP 96490019 A EP96490019 A EP 96490019A EP 96490019 A EP96490019 A EP 96490019A EP 0736348 A1 EP0736348 A1 EP 0736348A1
Authority
EP
European Patent Office
Prior art keywords
forestay
mesh
faces
ring
plane
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Withdrawn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
EP96490019A
Other languages
English (en)
French (fr)
Inventor
George Edmond André Marit
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.)
ETABLISSEMENTS MARIT, S.A.
Original Assignee
Marit Sa Ets
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 Marit Sa Ets filed Critical Marit Sa Ets
Publication of EP0736348A1 publication Critical patent/EP0736348A1/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Withdrawn legal-status Critical Current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
    • B21L—MAKING METAL CHAINS
    • B21L11/00—Making chains or chain links of special shape
    • B21L11/14—Making chain links with inserted or integrally-formed studs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components

Definitions

  • the invention relates to a method of making forestay meshes as well as to the means for implementing this method and to the forestay meshes thus obtained.
  • forestay meshes are intended to be used as anchor chains for ships, as mooring chains for oil drilling platforms, loading buoys or similar devices.
  • Forestay meshes include any piece in the form of an elongated ring provided, in its diametral plane perpendicular to its longitudinal axis, with a spacer, whatever the size of these rings and therefore without distinction between a mesh or a link and whatever the name of prop or prop may be given to the spacer according to the habits related to particular fields of application.
  • the mesh is firstly constituted from at least one section of a steel bar, generally cylindrical heated and shaped.
  • FR-A-2.050.510, 2.325.448 and 2.307.193 uses a single section which is forged in closed C but it is also known (GB-393.878) to use two forged sections in U then arranged with their concavity turned towards each other to form the ring.
  • the weld plane is located in the diametrical plane receiving the forestay.
  • the forestay is generally made up of a steel bar of variable, round, polygonal, cruciform section and this section can be both symmetrical and asymmetrical.
  • the ring is generally heated and pressed energetically in the diametrical direction to compress the forestay axially.
  • the wide contact between the forestay and the mesh side reduces the pressure per unit area and does not allow the forestay to print in the side of the mesh.
  • the concavity in the plane perpendicular to the plane containing the ring, also has a radius smaller than that of the lateral face on the side of the ring.
  • the forestay mesh 1 comprises a part 2 in the form of an elongated ring or "mesh" provided in its diametrical plane P perpendicular to its longitudinal axis 3 with a spacer 4 or "forestay".
  • the mesh 2 is firstly constituted from at least one section of a steel bar, generally but not exclusively cylindrical heated and shaped.
  • the weld plane is located in the diametrical plane P receiving the forestay 4.
  • the forestay 4 is made up of a steel bar of arbitrary section, for example, round, polygonal, cruciform.
  • ends also called “forestay feet” can be both symmetrical as asymmetrical, that is to say with a different width at the two ends.
  • the invention applies regardless of the width of the forestay foot knowing that, preferably, it is not less than seven tenths of the nominal diameter of the bar constituting the mesh.
  • the invention also applies regardless of the thickness of the forestay knowing that it is not less, in the central part, to thirty five hundredths of the nominal diameter of the bar constituting the mesh and, in the upper part (entrance of the groove) to twelve tenths of this nominal diameter.
  • the ring 2 is heated and pressed energetically in the diametrical direction to compress the forestay 4 axially, meanwhile left at room temperature.
  • the special shape of the ends 5, 6 of the forestay consists of a shape 11 which, in order to cooperate with that of the side face part 7, 8 on the side 9, 10 of the ring 2 against which the end considered must be apply, is in the diametral plane P perpendicular to the plane containing the concave ring.
  • Figures 4 and 5 are sections made in the diametrical plane.
  • the two faces 14, 15 of the Vé 11 are interconnected at least by a fillet 16, 17 and the bottom of the Vé has a flat 18 connected to the faces of the Vé by leaves 16, 17. But, instead of the flat, the bottom may have a simple rounded shape.
  • the free edges of the faces 14, 15 of the Vee 11 are preferably connected to the contiguous faces 19, 20 by rounded 21, 22.
  • the invention does not call into question the fundamental dimensions of the forestay which must be respected in order to conform the mesh to international standards (height at the bottom of the groove).
  • the faces 14, 15 of the Vee are not necessarily perfectly flat but can, without departing from the scope of the invention, be slightly curved, whether concave or cover.
  • This impression is accompanied by a relative creep by rolling the material of the ring through the faces of the Vee towards the periphery of the contact zone which reinforces the shoulder 23, 24 on either side of the face of the Vé.
  • the substantially constant V-shaped section allows production entirely by stamping and a visual check of the forestay penetration into the mesh side until the bottom of the Vé stops on the lateral face of the mesh side.
  • substantially constant is meant that, longitudinally, the end of the forestay may have a slight convexity due to undercuts.
  • the forestay mesh obtained according to the method of the invention has the advantage of very effective and durable anchoring of the forestay.
  • the branches of the Vé can be extended so as to complete their grip on the mesh bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Adornments (AREA)
EP96490019A 1995-04-03 1996-03-29 Stegkettenglieder, Verfahren und Vorrichtung zu seiner Herstellung Withdrawn EP0736348A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9504129 1995-04-03
FR9504129A FR2732250B1 (fr) 1995-04-03 1995-04-03 Procede de fabrication de mailles a etai, moyens en vue de la mise en oeuvre de ce procede et mailles a etai ainsi obtenues

Publications (1)

Publication Number Publication Date
EP0736348A1 true EP0736348A1 (de) 1996-10-09

Family

ID=9477846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96490019A Withdrawn EP0736348A1 (de) 1995-04-03 1996-03-29 Stegkettenglieder, Verfahren und Vorrichtung zu seiner Herstellung

Country Status (2)

Country Link
EP (1) EP0736348A1 (de)
FR (1) FR2732250B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE540508A (de) *
FR901239A (fr) * 1943-01-25 1945-07-20 Kohle Und Eisenforschung Gmbh Procédé pour fabriquer les maillons de chaînes à traverses au moyen de la soudure électrique par résistance
GB656639A (en) * 1949-02-07 1951-08-29 Humphrey George Taylor Improvements in, and in the manufacture of, studded chain links
DE1200104B (de) * 1956-06-19 1965-09-02 Meyer Roth Pastor Maschf Einschweissbares Stegvorwerkstueck beim Herstellen von Stegkettengliedern
GB2262967A (en) * 1988-12-03 1993-07-07 Skf Gmbh Mounting bearing race rings.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE540508A (de) *
FR901239A (fr) * 1943-01-25 1945-07-20 Kohle Und Eisenforschung Gmbh Procédé pour fabriquer les maillons de chaînes à traverses au moyen de la soudure électrique par résistance
GB656639A (en) * 1949-02-07 1951-08-29 Humphrey George Taylor Improvements in, and in the manufacture of, studded chain links
DE1200104B (de) * 1956-06-19 1965-09-02 Meyer Roth Pastor Maschf Einschweissbares Stegvorwerkstueck beim Herstellen von Stegkettengliedern
GB2262967A (en) * 1988-12-03 1993-07-07 Skf Gmbh Mounting bearing race rings.

Also Published As

Publication number Publication date
FR2732250A1 (fr) 1996-10-04
FR2732250B1 (fr) 1997-07-11

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