EP0042450A1 - Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé - Google Patents

Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé Download PDF

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Publication number
EP0042450A1
EP0042450A1 EP80103466A EP80103466A EP0042450A1 EP 0042450 A1 EP0042450 A1 EP 0042450A1 EP 80103466 A EP80103466 A EP 80103466A EP 80103466 A EP80103466 A EP 80103466A EP 0042450 A1 EP0042450 A1 EP 0042450A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
edges
board
folded
edge
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.)
Granted
Application number
EP80103466A
Other languages
German (de)
English (en)
Other versions
EP0042450B1 (fr
Inventor
Joachim Bichel
Werner Schneider
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.)
Leifeld GmbH and Co
Leifeld and Co GmbH
Original Assignee
Leifeld GmbH and Co
Leifeld and Co GmbH
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 Leifeld GmbH and Co, Leifeld and Co GmbH filed Critical Leifeld GmbH and Co
Priority to DE8080103466T priority Critical patent/DE3065038D1/de
Priority to AT80103466T priority patent/ATE4782T1/de
Priority to EP80103466A priority patent/EP0042450B1/fr
Publication of EP0042450A1 publication Critical patent/EP0042450A1/fr
Application granted granted Critical
Publication of EP0042450B1 publication Critical patent/EP0042450B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B21C37/108—Making tubes with riveted seams or with non-welded and non-soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • B21C37/105—Supply, or operations combined with supply, of strip material

Definitions

  • the invention relates to a. Process for the manufacture of mufflers for mufflers with a folded longitudinal seam, whereby a rectangular sheet metal plate bent on both sides is bent into a U-shape around a mandrel, the longitudinal edges are brought together in parallel and then bent together to form a fold seam by means of multiple roll overflows and then the jacket is stripped from the mandrel and an apparatus for performing this method.
  • this method has so far been carried out so that the U-shaped sheet metal is run over by a roller carriage, the legs of the U being bent first by rollers and then applied to the mandrel by guide cheeks or rollers and then to a fold seam be put together.
  • the jacket is then provided with end plates on both sides and the end plates are also connected to the jacket by seams.
  • the sheets or plates are provided with corner cutouts so that the ends of the sheaths can be folded.
  • a disadvantage of the known method described above has been found that the shells do not have a constant diameter over their length, but rather are slightly conical. As a result, it is not possible to achieve complete tightness in the area of the corner cutouts and on the other hand attaching the end disks is very difficult since the end disks are the same size for both ends and therefore only fit incompletely due to the taper at the ends.
  • Another disadvantage of the known method is that the fold or fold seam turns out unevenly over the length (also due to the taper) and the required values for the tightness can therefore often not be achieved. The poor seam is also a point of attack for corrosive damage to the mufflers.
  • circuit boards which consist of two sheets, cannot be processed or can only be processed with great difficulty.
  • the fold seam which should be able to be produced on the basis of the invention, should continue to have a uniform shape over the entire length with complete tightness, and it should also be possible to produce high-quality jackets from double sheets. It is also possible to process stainless steel, whereby lubrication can largely be dispensed with, which is very important for further processing.
  • the device according to the invention should be of simple construction, not be susceptible to malfunction and should be able to work with particularly short cycle times.
  • the blanks are folded on two mutually parallel edges, preferably preferably high and on the other hand preferably downwards, then transported under the mandrel and, after the U-shaped bending, the folded edges are simultaneously brought together over their entire length be and then the formation of the fold seam is carried out by the successive roll overflows.
  • the processing of two-layer or multi-layer sheets, which are connected to one another at one of their longitudinal edges, is advantageously achieved in that the sheet lying on the outside in the finished jacket at its free edge in relation to the inside protrudes as much as the circumferential difference between corresponds to the outer and inner sheet, the outer sheet after clamping and possibly bending the connected edge with its free edge is pushed towards the tensioned end by arching the outer sheet between the edges until the free edges of the outside - And inner sheet metal lie in a certain ratio above one another, the free edges of the sheet metal are clamped together and folded and after releasing the tension, the outer sheet rests against the inner sheet metal, the bent pieces taking up a distance from each other at the free edge.
  • the corresponding device is advantageously constructed according to the invention in such a way that it has two clamping jaws on both sides for clamping the edges of the board and one folding jaw that preferably works upwards and preferably downwards, and that on one side there is a sliding jaw that protrudes the protruding edge of the outside Push the sheet metal up to the edge of the inner sheet metal before the sheets are folded together at this edge will.
  • the solution according to the invention allows the manufacture of mufflers for mufflers according to the requirements mentioned above with the simplest means, particularly short cycle times and thus particularly good machine utilization is possible, one can speak of an ideal solution to the problems at hand.
  • a board first runs into the device 1 for folding the two longitudinal edges of the board 3.
  • This device (FIGS. 6 and 7) can bend both sheets made of one sheet or sheets made of two sheets 3 and 3a.
  • this is clamped on both sides by the clamping jaws 22 and 23 on the one hand and the clamping jaws 24 and 25 on the other hand and the folding jaws 26 on the one hand and 27 on the other hand, the protruding sheet metal edges according to FIGS. 6 and 7 preferably edge up or up on the left side the right side down.
  • the blank 3 thus pre-processed then runs on a conveyor track 33 and against a stop 30, so that it is ensured that, regardless of the size of each blank, the outermost edge at which the subsequent folding process will begin, as far as possible in the direction of the roller carriage 9 was advanced to make the fold seam.
  • the folding device 1 is equipped with a further sliding jaw 28.
  • the double-sheet board is at one of its longitudinal edges with a connection, for. B. welding of the two different sheets and this is clamped according to Figures 6 and 7 on the right side and folded by the folding jaw 27 as described.
  • the outer, thinner sheet 3a protrudes from the thicker 3 by a distance by which the circumference of the outer sheet after rounding is greater than that of the inner sheet 3.
  • the edge is now pushed back by the sliding jaw 28 with its edge, the thinner, outer sheet 3a until this edge is in a certain relationship to the outer edge of the sheet 3 and the sheet bends slightly according to FIG. 6.
  • the protruding edge is then preferably bent upwards by the folding jaw 26 as described above and after loosening the clamping jaws 22 and 23, this moves forward under sheet 3a according to FIG. 7 by a small, protruding piece 29.
  • both the span between the two folding sides of the folding device 1 and the position of the stop 32 can be changed in the simplest way, so that sheets of various widths and lengths can be processed with minor changes.
  • the conveyor tracks 33 and 34 are preferably designed as walking beam tracks.
  • the board 3 After the board 3 has run in under the mandrel 4 with the folds that have already taken place, the board becomes opposed to the mandrel by raising the piston Cylinder-piston arrangement 5 fixed. Thereafter, the sliding jaws 6a and 6b are raised simultaneously and now bend the plate 3 in the shape of a U. Also, in a simple manner, the mandrel 4 and the height adjustment of the parts 5 can be changed-6a and 6b, so that readily coats for mufflers various diameter or different, rounded form, for., B. elliptical, oval and the like can be produced.
  • the mandrel 4 is divided into at least two halves, 4a and 4b and spreading agents act between the halves, e.g. B. a wedge with which the parts of the mandrel 4 during the machining process, d. H. the bending and folding, can be spread apart. After the folding is finished, the spread is withdrawn and thus the friction when pushing the jacket off the mandrel is decisively prevented, which could otherwise easily damage the board 3.
  • the division can also be triple.
  • the board which is now a position shown in dashed t s shown in Figure 8 assumes, will now be compressed over its entire length evenly with their folded edges.
  • the device according to the invention has bending jaws 7, each of which can be pivoted via a piston-cylinder arrangement 8, and when the bending jaws 7 are retracted, the sheet metal or the board is now brought into the position according to FIG. 8, the bending jaws 7 ensuring this that the sheet metal edges are in an absolutely parallel position to each other.
  • the jacket therefore also has a cross-sectional shape which is uniform over its length.
  • roller carriage 9 which carries a number of downwardly directed rollers 10-21, wherein the rollers 10-19 are each arranged in pairs and act laterally.
  • rollers are combined in a roller carriage 9, which can be exchanged as a unit when the shape of the seam is changed or, if necessary, also when the diameter of the casing to be manufactured is changed and thus when the width of the seam is changed.
  • the roles can therefore be exchanged by untrained personnel - the same also applies to the above-described adaptation of the device according to the invention to a wide variety of sheet widths, i. H. Diameter and sheet lengths, d. H. Jacket lengths.
  • the upright bend is placed on the mandrel 4 by the roller 9 and at the same time the downward bend is pressed down by the roller 1.
  • the following pair of rollers 12 and 13 places the upright bevel in an inclined position, while at the same time the material of the board is brought parallel to the downward beveled up to the edge of the upright bevel.
  • roller pairs 14, 15; 16, 17 and 18, 19 a bending of the downward-pointing fold to the upward-pointing fold and a bending around it.
  • the rollers 20 and 21 are arranged in the rear of the roller carriage in the direction of travel.
  • the jacket can be stripped off by means of a hook attached to the roller carriage when the roller carriage returns.
  • the roller carriage is controlled so that it interrupts its overflow when the latter of the rollers, 21, has overflowed the end of the jacket. Since the approach of the stop 30 already ensures that the edge of the profile to be folded is directly in front of the first roller 10, the length of movement of the roller carriage 9 is kept as short as possible so that the cycle times of the machine can be optimally high and so that maximum machine utilization can be achieved. Since only a much smaller number of rolls are used than in the known prior art, the rolls can also have a greater distance from one another than previously used, and this also improves the quality of the fold, since the various influences of the rolls no longer act to the next point of engagement can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Exhaust Silencers (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP80103466A 1980-06-21 1980-06-21 Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé Expired EP0042450B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8080103466T DE3065038D1 (en) 1980-06-21 1980-06-21 Process for producing silencer cases with a folded longitudinal seam and apparatus for carrying out this process
AT80103466T ATE4782T1 (de) 1980-06-21 1980-06-21 Verfahren zur herstellung von maenteln fuer auspufftoepfe mit einer gefalzten laengsnaht und vorrichtung zur durchfuehrung dieses verfahrens.
EP80103466A EP0042450B1 (fr) 1980-06-21 1980-06-21 Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80103466A EP0042450B1 (fr) 1980-06-21 1980-06-21 Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé

Publications (2)

Publication Number Publication Date
EP0042450A1 true EP0042450A1 (fr) 1981-12-30
EP0042450B1 EP0042450B1 (fr) 1983-09-28

Family

ID=8186700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103466A Expired EP0042450B1 (fr) 1980-06-21 1980-06-21 Procédé pour la fabrication d'enveloppes de pots d'échappement à joint longitudinal plié et dispositif pour la réalisation de ce procédé

Country Status (3)

Country Link
EP (1) EP0042450B1 (fr)
AT (1) ATE4782T1 (fr)
DE (1) DE3065038D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000007748A2 (fr) * 1998-07-24 2000-02-17 Eagle Precision Technologies Limited Appareil de formation de pieces tubulaires, et mandrin a cet usage
AT406939B (de) * 1992-10-22 2000-10-25 Peter Knoll Vorrichtung zum profilieren von blechen
CN104646459A (zh) * 2013-11-20 2015-05-27 铜陵市大成轧辊有限责任公司 法兰压制装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1543460A (en) * 1922-01-26 1925-06-23 Seattle Astoria Iron Works Can-body-forming machine
US1588413A (en) * 1925-03-06 1926-06-15 Henry A Hardy Ice-cream dipper
US2212715A (en) * 1938-01-26 1940-08-27 Excel Curtain Company Method of and machine for forming tubing
US2644416A (en) * 1949-02-02 1953-07-07 Oldberg Mfg Company Apparatus for forming tubes
US3369568A (en) * 1964-06-23 1968-02-20 Grace W R & Co Side seam seal for metal containers
DE1932634A1 (de) * 1968-07-05 1970-01-08 Tagers Gmbh Verfahren und Vorrichtung zur Herstellung von geschweissten Dosenruempfen
US3672317A (en) * 1971-02-19 1972-06-27 Export Tool & Welding Co Ltd Metal spinning machine
DE7324077U (de) * 1973-09-27 Asdorfer Eisenwerk Gmbh Biegevorrichtung zum Rundbiegen von Blechzuschnitten, insbesondere zu Rohrschüssen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1888413A (en) * 1930-03-13 1932-11-22 Arthur H Parker Method of making alpha can

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7324077U (de) * 1973-09-27 Asdorfer Eisenwerk Gmbh Biegevorrichtung zum Rundbiegen von Blechzuschnitten, insbesondere zu Rohrschüssen
US1543460A (en) * 1922-01-26 1925-06-23 Seattle Astoria Iron Works Can-body-forming machine
US1588413A (en) * 1925-03-06 1926-06-15 Henry A Hardy Ice-cream dipper
US2212715A (en) * 1938-01-26 1940-08-27 Excel Curtain Company Method of and machine for forming tubing
US2644416A (en) * 1949-02-02 1953-07-07 Oldberg Mfg Company Apparatus for forming tubes
US3369568A (en) * 1964-06-23 1968-02-20 Grace W R & Co Side seam seal for metal containers
DE1932634A1 (de) * 1968-07-05 1970-01-08 Tagers Gmbh Verfahren und Vorrichtung zur Herstellung von geschweissten Dosenruempfen
US3672317A (en) * 1971-02-19 1972-06-27 Export Tool & Welding Co Ltd Metal spinning machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406939B (de) * 1992-10-22 2000-10-25 Peter Knoll Vorrichtung zum profilieren von blechen
WO2000007748A2 (fr) * 1998-07-24 2000-02-17 Eagle Precision Technologies Limited Appareil de formation de pieces tubulaires, et mandrin a cet usage
WO2000007748A3 (fr) * 1998-07-24 2000-11-09 Eagle Prec Technologies Ltd Appareil de formation de pieces tubulaires, et mandrin a cet usage
CN104646459A (zh) * 2013-11-20 2015-05-27 铜陵市大成轧辊有限责任公司 法兰压制装置

Also Published As

Publication number Publication date
ATE4782T1 (de) 1983-10-15
DE3065038D1 (en) 1983-11-03
EP0042450B1 (fr) 1983-09-28

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