DE2741717A1 - Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam - Google Patents

Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam

Info

Publication number
DE2741717A1
DE2741717A1 DE19772741717 DE2741717A DE2741717A1 DE 2741717 A1 DE2741717 A1 DE 2741717A1 DE 19772741717 DE19772741717 DE 19772741717 DE 2741717 A DE2741717 A DE 2741717A DE 2741717 A1 DE2741717 A1 DE 2741717A1
Authority
DE
Germany
Prior art keywords
prongs
side edges
pipe section
stamped
rolled
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Withdrawn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
DE19772741717
Other languages
German (de)
Inventor
Walter Clauss
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Priority to DE19772741717 priority Critical patent/DE2741717A1/en
Publication of DE2741717A1 publication Critical patent/DE2741717A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/10—Making tubes with riveted seams or with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/10—Making tubes with riveted seams or with non-welded and non-soldered seams
    • B21C37/101—Making of the seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/10—Making tubes with riveted seams or with non-welded and non-soldered seams
    • B21C37/104—Making tubes with riveted seams or with non-welded and non-soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/156—Making tubes with wall irregularities
    • B21C37/157—Perforations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/26—Tubes being formed by extrusion, drawing or rolling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

A flat sheet of metal(1) has a set of holes(1') stamped from it. At the same time the longitudinal edges are stamped out as projecting tongues, the tongues on one side being staggered from those on the other. After stamping the sheet is rolled into a tube and the tongues on one side fit the grooves between the tongues on the other side. This makes a longitudinal seam which does not require welding. The curved sides of the tongues and grooves between them prevent stress concentrations along the seam. The joint is tight enough for use in a silencer.

Description

Aus einem Blechstreifen gerolltes Rohrstück Piece of pipe rolled from a metal strip

Die Erfindung betrifft ein Rohrstück, das aus einem mit gestantzen Lochungen oder mit gepreßten, ggf. eine Durchbrechung aufweisenden Ausbeulungen versehenen, in Umfangsrichtung gerollten und an den beiden Seitenkanten fest verbundenen Blechstreifen besteht. Dieses Rohrstück kann ein Durchströmrohr in einem Auspufftopf oder auch ein Innen- oder Außenmantel eines Auspufftopfes sein.The invention relates to a pipe section which is punched from a with Perforations or with pressed bulges, possibly with an opening provided, rolled in the circumferential direction and firmly connected at the two side edges Sheet metal strip consists. This pipe section can be a flow pipe in a muffler or an inner or outer jacket of a muffler.

Bisher wurde die feste Verbindung an den beiden Seitenkanten durch Schweißen hergestellt, Dies stellt einen zusätzlichen Arbeitsvorgang <lir und ist recht aufwendig.So far, the fixed connection has been made on both side edges Welding made, This represents an additional operation <lir and is quite complex.

Es ist Aufgabe der Erfindung, die Herstellung derartiger Rohrstücke bei ausreichender Dichtheit und Festigkeit zu verbiligen.It is the object of the invention to produce such pipe sections to become cheaper with sufficient tightness and strength.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die feste Verbindung durch an sich bekannte formschlüssig ineinander gepreßte hinterschnittene Zacken und Liicken an den aneinander anstoßenden Seitenkanten des Sllechstreifens erfolgt.According to the invention, this object is achieved in that the fixed connection by undercut prongs which are known per se and are pressed into one another in a form-fitting manner and there are gaps on the abutting side edges of the sheet metal strip.

Die llerstellung glatter, also nicht mit Lochungen oder Ausbeulungen versehener Rohrstücke ohne eigens angegebenen Verwendungszweck durch stollen eines Blechstreifens in Umfangsrichtung urid festes Verbinden an den beiden Seitenkanten durch Verklainmern mittels hinterschnittener Zacken und Lücken ist durch die US-Patentschriften 1 016 584 und 1 999 818 Stand der Technik. Nach der 11s-patentschrift 1 999 818 sind die Zacken einander gleich und eckig ausgebildet, so daß beim Zusammenprefler und im Betrieb Druchgefahr durch Kerbspannungen besteht.The production is smoother, i.e. not with perforations or bulges provided pipe sections without a specifically stated purpose through a tunnel Sheet metal strip in the circumferential direction and firm connection on the two side edges by means of undercut spikes and gaps is clarified by the US patents 1 016 584 and 1 999 818 state of the art. According to the 11s patent specification 1 999 818 the prongs are designed to be equal and angular, so that when they are pressed together and there is a risk of notch stresses during operation.

Nach der 115-Patentschrift 1 016 584 sind die Zacken mit stark unterschiedlicher Breite ausgebildet und nur zum geringen Teil am Umfang gerundet. Gefährliche Kerbspannungen treten also auch hier auf.According to '115 patent specification 1,016,584, the prongs are strong different Wide and only slightly rounded on the circumference. Dangerous notch stresses so occur here too.

Beim erfindungsgemäßen Rohrstück geschicht das Stanzen der Lochungen bzw. das Preßen der ggf. mit einer Durchbrechung versehenen Ausbeulungen im gleichen Arbeitsvorgang mit dem Stanzen der Zacken an den seitenkanten des Blechstreifens. In vorteilhalter Weise entfällt der Schweißvorgang.In the pipe section according to the invention, the punching of the holes is history or the pressing of the bulges, possibly provided with an opening, in the same Work process with the punching of the prongs on the side edges of the sheet metal strip. The welding process is advantageously omitted.

Die Verklammerung der besonders geformten Zacken bietet eine für die Verwendung des Rohrstücks in Auspuffanlagen völlig ausreichend dichte und feste Verbindung, zumal da nach einem weiteren Merkmal der Erfindung die Zacken einen allseitig gerundeten Umfang aufweisen.The bracing of the specially shaped prongs offers one for the Use of the pipe section in exhaust systems completely sufficiently tight and firm Connection, especially since, according to a further feature of the invention, the prongs one have rounded circumference on all sides.

@e nach der zu erwartenden Belastung sind die Zacken an den beiden Seitenkanten einander gleich oder mit jeweils unterhiedliche Breite ausgebildet. Die an einer Seitenkanten angebrachteten Breiten Zacken können dabei nach einem weiteren Merkmal der Erfindung eine Einbuchtung von vorzugsweise etwa halber Höhe aufweisen, in die jeweils eine Ausbuchtung an den breiten Lücken der anderen Seitenkante formschlüssig eingreift.@e after the expected load are the spikes on the two Side edges are designed to be the same or different in width. The broad prongs attached to one side edge can be used after a Another feature of the invention is an indentation of preferably about half the height have, in each of which a bulge on the wide gaps of the other side edge engages positively.

Die Erfindung wird nun anhand der Zeichnung mit mehreren Ausführungsbeispielen näher erläutert dabei zeigt 110'. 1 einen der Erfindung zugrunde liegenden, mit Lochungen und an seinen Seitenkanten mit allseitig gerundeten gleichen Zacken versehenen Blechstreifen, Fig. 2 die Verbindungssteile des erfindungsgemäßen Rohrstücks mit allseitig gerundeten Zacken von unterschiedlicher Breite je Seitenkante und in 3 in Abänderung der Fig. 2 eine Einbuchtung an den breiten Zacken, in die jeweils eine Ausbuchtung an den breiten Lücken der anderen Seitenkante formschlüssig eingreift.The invention will now be described with reference to the drawing with several exemplary embodiments illustrated in more detail here shows 110 '. 1 one underlying the invention, with Perforations and provided on its side edges with the same prongs rounded on all sides Sheet metal strips, Fig. 2 with the connecting parts of the pipe section according to the invention serrations rounded on all sides of different widths per side edge and in 3 in a modification of FIG. 2, an indentation on the broad prongs, in each of the a bulge engages positively in the wide gaps on the other side edge.

Nach Fit. 1 weist der mit. gestanzten Lochungen 1' versehene Blechstreifen 1 an seinen ;eitenkanten 2 und 2' im gleichen Arhel tsvorgan,: gestanzte hinterschnittene gleiche Zacken 3 bzw. 3' mit allseitig gerundetem Umfang auf. Nach dem Rollen des Blechstreifens zu einem Rohrstück werden die Zacken in die entsprechend geformten Lücken der anderen Seitenkante eingepreßt.After Fit. 1 shows the with. punched perforations 1 'provided sheet metal strips 1 at its; side edges 2 and 2 'in the same Arhel tsvorgan,: punched undercut same prongs 3 or 3 'with rounded circumference on all sides. After rolling the Sheet metal strip to a piece of pipe, the prongs are shaped accordingly Pressed in gaps in the other side edge.

Nach Fig. 2 sind die hinterschnittenen Zacken 4 bzw. 4' wieder mit allseitig gerundetem Umfang, jedoch mit unterschiedlicher Breite je Seitenkante 2 bzw. 2' ausgebildet, was gewisse Vorteile hinsichtlich des Stanzwerkzeugs bietet.According to Fig. 2, the undercut prongs 4 and 4 'are again with Rounded circumference on all sides, but with different widths on each side edge 2 or 2 ', which offers certain advantages with regard to the punching tool.

Nach Fig. 3 ist, in Abänderung derFig. 2 an den breiten Zacken 5 der einen Seitenkante 2 eine Einbuchtung 6 angebracht, in die jeweils eine Ausbuchtung 6' an den breiten Lücken zwischen den schmalen Zacken 5' der anderen Seitenkante 2' formschlüssig eingreift; dadurch können die Zacken 5 besonders breit ausgebildet werden, was das Stanzwerkzeug weiter verbilligt.According to Fig. 3, in a modification of Fig. 2 at the broad prongs 5 of the a side edge 2 an indentation 6 attached, in each of which a bulge 6 'at the wide gaps between the narrow prongs 5' on the other side edge 2 'engages positively; as a result, the prongs 5 can be made particularly wide become, which makes the punching tool cheaper.

Claims (5)

P a t e n t a n s p r ü c h e 1. Aus einem mit gestanzten Lochungen oder mit gepreßten ggf. P a t e n t a n t a n t r u c h e 1. From one with punched holes or with pressed if necessary eine Durchbrechung aufweisenden Ausbeulungen versehenen, in Umfangsrichtung gerollten und an den beiden Seitenkanten fest verbundenen Blechstreifen bestehendes Rohrstück für Auspuffanlagen, dadurch gekennzeichnet, daß die feste Verbindung durch an sich bekannte formschlüssig ineinander gepreßte hinterschnittene Zacken (3, 3' bzw. 4, 4' bzw. 5, 5') und Lücken an den aneinander anstoßenden Seitenkanten (2, 2') des Blechstreifens (1) erfolgt.bulges provided with an opening in the circumferential direction rolled sheet metal strips that are firmly connected to the two side edges Pipe section for exhaust systems, characterized in that the fixed connection through undercut prongs (3, 3 ' or 4, 4 'or 5, 5') and gaps on the abutting side edges (2, 2 ') of the sheet metal strip (1) takes place. 2. Rohrstück nach Anspruch 2, dadurch gekennzeichnet, daß die Zacken einen allseitig gerundeten Umfang aufweiten. 2. Pipe section according to claim 2, characterized in that the prongs expand a circumference rounded on all sides. 3.Rohrstück nach Anspruch 2, dadurch gekennzeichnet, daß die Zacken (3, 3') an den beiden Seitenkanten (2, 2') einander gleich ausgebildet sind (Fig. 1). 3.Rohrstück according to claim 2, characterized in that the prongs (3, 3 ') on the two side edges (2, 2') are designed to be identical to one another (Fig. 1). 4. Rohrstück nach Anspruch 2, dadurch gekennzeichnet, daß die Zacken (4, 4') an den beiden Seitenkanten (2, 2') jeweils unterschiedlich breit ausgebildet sind (Fig. 2). 4. Pipe section according to claim 2, characterized in that the prongs (4, 4 ') on the two side edges (2, 2') each formed with different widths are (Fig. 2). 5. Rohrstück nach Anspruch 4, dadurch gekennzeichnet, daß die an einer Seitenkante (2) angebrachten breiten Zacken (5) eine Einbuchtung (6) von vorzugsweise halber Höhe aufweisen, in die jeweils eine Ausbuchtung (6') an den breiten Lücken zwischen den schmalen Zacken (5') der anderen Seitenkante (2') formschlüssig eingreift (Fig. 3). 5. Pipe section according to claim 4, characterized in that the to a side edge (2) attached wide prongs (5) an indentation (6) of preferably half height, in each of which a bulge (6 ') at the wide gaps engages positively between the narrow prongs (5 ') of the other side edge (2') (Fig. 3).
DE19772741717 1977-09-16 1977-09-16 Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam Withdrawn DE2741717A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772741717 DE2741717A1 (en) 1977-09-16 1977-09-16 Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772741717 DE2741717A1 (en) 1977-09-16 1977-09-16 Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam

Publications (1)

Publication Number Publication Date
DE2741717A1 true DE2741717A1 (en) 1979-03-29

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ID=6019099

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772741717 Withdrawn DE2741717A1 (en) 1977-09-16 1977-09-16 Perforated tube for exhaust gas silencer - is rolled from perforated sheet with edges stamped to make mechanical joint along seam

Country Status (1)

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DE (1) DE2741717A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743123A1 (en) * 1995-05-18 1996-11-20 Valeo Thermique Moteur Process for interlocking a tubular shell of the fluid box of an heat exchanger
WO1999062669A1 (en) * 1998-06-02 1999-12-09 Elpatronic Ag Method for forming a sheet metal assembly and corresponding device and sheet metal set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743123A1 (en) * 1995-05-18 1996-11-20 Valeo Thermique Moteur Process for interlocking a tubular shell of the fluid box of an heat exchanger
FR2734193A1 (en) * 1995-05-18 1996-11-22 Valeo Thermique Moteur Sa PROCESS FOR CLOSING A TUBULAR WALL OF A HEAT EXCHANGER FLUID BOX
WO1999062669A1 (en) * 1998-06-02 1999-12-09 Elpatronic Ag Method for forming a sheet metal assembly and corresponding device and sheet metal set

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