DE925107C - Process for the production of a bar grating, in particular a catwalk for goods wagon roofs - Google Patents

Process for the production of a bar grating, in particular a catwalk for goods wagon roofs

Info

Publication number
DE925107C
DE925107C DES33448A DES0033448A DE925107C DE 925107 C DE925107 C DE 925107C DE S33448 A DES33448 A DE S33448A DE S0033448 A DES0033448 A DE S0033448A DE 925107 C DE925107 C DE 925107C
Authority
DE
Germany
Prior art keywords
twisting
strips
catwalk
production
roofs
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.)
Expired
Application number
DES33448A
Other languages
German (de)
Inventor
Ernst Baeumer
Konrad Truemper
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.)
Siegener Eisenbahnbedarf AG
Original Assignee
Siegener Eisenbahnbedarf AG
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 Siegener Eisenbahnbedarf AG filed Critical Siegener Eisenbahnbedarf AG
Priority to DES33448A priority Critical patent/DE925107C/en
Application granted granted Critical
Publication of DE925107C publication Critical patent/DE925107C/en
Expired legal-status Critical Current

Links

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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/005—Making gratings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Stabrostes für Güterwagendächer, bei welchem aus einem Blechstreifen, unter Belassung je eines unverletzten Randstreifens an beiden Längsrändern, durch im Abstand der Roststäbe geführte Trennschnitte Querstreifen für die Bildung der Roststäbe freigelegt werden, die anschließend durch Verwinden im Übergang zu den unverletzten Randstreifen mit ihrer Fläche zur Fläche des Vorwerkstückes verdreht werden. Bei der Herstellung der Stabroste nach diesen bekannten Herstellungsverfahren treten insbesondere dann, wenn ein harter und spröder Werkstoff, wie gewisse Hartaluminiumlegierungen, verwendet wird, im Verwindungsbereich Risse auf. Diese Rißbildung kann erfindungsgemäß dadurch vermieden werden, daß die ausgetrennten Querstreifen vor dem Verwinden im Verwindungsbereich zur Verwindungsachse parallel längs geschlitzt werden.The invention relates to a method for producing a bar grating for freight car roofs, in which from a sheet metal strip, leaving one each uninjured edge strip on both longitudinal edges, due to the distance between the grate bars Guided separating cuts, horizontal strips for the formation of the grate bars are exposed, which then by twisting in the transition to the uninjured edge strips with their surface to be rotated to the surface of the preliminary workpiece. In the preparation of the bar gratings according to these known manufacturing processes occur in particular, when using a hard and brittle material such as certain hard aluminum alloys cracks in the torsion area. According to the invention, this crack formation can thereby be avoided that the cut transverse strips before twisting in the twisting area be slotted lengthways parallel to the torsion axis.

Die Erfindung sei an Hand der Draufsicht auf das Vorwerkstück mit ausgetrennten Querstreifen erläutert.The invention is based on the plan view of the preliminary workpiece separated horizontal stripes explained.

Ein Blechstreifen i wird zunächst mit quer liegenden Ausschnitten a versehen, zwischen denen die die Sprossen des Stabrostes bildenden Querstreifen 3 stehenbleiben. Diese Querstreifen 3 werden in dem Bereich V verwunden, so daß die Fläche der Streifen 3 schräg, insbesondere senkrecht zu der Fläche i zu stehen kommt. Bei diesem Verwinden treten im Verwindungsbereich Risse auf. Diese sind dadurch vermeidbar, daß in dem Bereich V parallel zu der Verwindungsachse 4-4 Längsschlitze 5 vorgesehen sind, bevor die Streifen 3 verwunden werden. Die Schlitzbreite wird zweckmäßig entsprechend der zunehmenden Verbreiterung der Querstreifen 3 auf dem unverletzten Randstreifen 6 nach der Mitte der Querstreifen 3 hin ebenfalls in gleicher Richtung größer werdend vorgesehen.A sheet metal strip i is first made with transverse cutouts a, between which the transverse strips forming the rungs of the bar grating 3 stop. These transverse strips 3 are twisted in the area V, so that the surface of the strips 3 to be inclined, in particular perpendicular to the surface i comes. During this twisting, cracks appear in the twisting area. These are thereby avoidable that in the area V parallel to the torsion axis 4-4 longitudinal slots 5 are provided before the strips 3 are twisted. The slot width becomes expediently corresponding to the increasing widening of the transverse strips 3 on the uninjured edge strips 6 towards the middle of the transverse strips 3 also in the same way Direction intended to increase.

Claims (1)

PATEN TANSPRItCII: Verfahren zur Herstellung eines Stabrostes, insbesondere eines Laufsteges für Güterwagendächer, bei welchem aus einem Blechstreifen, unter Belassürig. @ eines unverletzten Randstreifens an beiden Längsrändern, durch im Abstand der Roststäbe geführte Trennschnitte Querstreifen für die Bildung der Roststreifen freigelegt werden, die anschließend durch Verwinden im Übergang zu den unverletzten Randstreifen mit ihrer Fläche zur Fläche des Vorwerkstückes verdreht werden, dadurch gekennzeichnet, daß vor dem Verwinden im Verwindungsbereich ein zur Verwindungsachse paralleler Längsschlitz (5) ausgestanzt wird. PATEN TANSPRItCII: Process for the production of a bar grating, in particular a catwalk for freight car roofs, in which a sheet metal strip is left in place. @ an undamaged edge strip on both longitudinal edges, by separating cuts made at a distance between the grate bars, transverse strips for the formation of the grate strips are exposed, which are then twisted by twisting in the transition to the undamaged edge strips with their surface to the surface of the preliminary workpiece, characterized in that before the Twisting a longitudinal slot (5) parallel to the twisting axis is punched out in the twisting area.
DES33448A 1953-05-17 1953-05-17 Process for the production of a bar grating, in particular a catwalk for goods wagon roofs Expired DE925107C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES33448A DE925107C (en) 1953-05-17 1953-05-17 Process for the production of a bar grating, in particular a catwalk for goods wagon roofs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES33448A DE925107C (en) 1953-05-17 1953-05-17 Process for the production of a bar grating, in particular a catwalk for goods wagon roofs

Publications (1)

Publication Number Publication Date
DE925107C true DE925107C (en) 1955-03-14

Family

ID=7481173

Family Applications (1)

Application Number Title Priority Date Filing Date
DES33448A Expired DE925107C (en) 1953-05-17 1953-05-17 Process for the production of a bar grating, in particular a catwalk for goods wagon roofs

Country Status (1)

Country Link
DE (1) DE925107C (en)

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