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
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
  • F01N3/28—Construction of catalytic reactors
  • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
  • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
• • 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
  • F01N13/08—Other arrangements or adaptations of exhaust conduits
• • 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
  • B21C37/30—Finishing tubes, e.g. sizing, burnishing
• • 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
  • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
• • 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
  • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
• • 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
  • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
  • F01N2350/02—Fitting ceramic monoliths in a metallic housing
  • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
• • 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
  • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
  • F01N2450/02—Fitting monolithic blocks into the housing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
  • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

• the invention relates to a method for producing a calibrated component, in particular for a motor vehicle exhaust system.
• the invention also relates to a component for a motor vehicle exhaust system, in particular a housing for a substrate.
• “Calibration” is understood to mean a process in which a generally elongate, generally tubular component made of a plastically deformable material is compressed in the radial direction and plastically deformed in order to achieve a specific inner diameter
• the housing is provided as a tube with an inner diameter that is slightly larger than the outer diameter of the substrate, plus the wall thickness of a bearing mat surrounding the substrate the bearing mat is inserted together into the housing, and the housing is calibrated or reduced, whereby the inner diameter of the housing is reduced so far that the substrate and the bearing mat are held by friction in the housing.
• the housing usually used consist of a metal strip, of which two longitudinal edges are connected to each other by means of a weld, so that a tube is formed.
• the weld extends parallel to the longitudinal axis of the housing. It has been found that the weld during calibration can lead to problems and a relatively high reject rate. For some components, the housing collapses during calibration in the region of the weld seam. This results in that the weld is pushed into the interior of the housing, whereby the substrate received in the housing is destroyed.
• the object of the invention is to improve the calibration process to the extent that the reject rate decreases. - -
• a method for producing a calibrated component is provided according to the invention, in particular for a motor vehicle exhaust system, with the following steps: A tube is provided which has a weld seam along its longitudinal axis. Then it is detected at which point of the circumference of the tube, the weld is. Subsequently, the tube is aligned in the circumferential direction so that the weld is at a certain point. Then the tube is calibrated, the weld being covered by a pressure jaw.
• the invention is based on the recognition that the weld during calibration can lead to problems in particular if it is free between two pressure jaws, by means of which the tube is calibrated. In contrast, if the tube is aligned in the circumferential direction so that the weld is in the region of a pressure jaw, a very low reject rate can be achieved.
• the detection of the weld can be done by any suitable sensor, such as optical, inductive or mechanical. It is also possible to color-mark the weld to facilitate optical detection.
• the method can be carried out so that the weld is always aligned to a single specific point, so based on a specific jaw.
• the tube is only aligned in each case so far that the weld with each closest
• a component for a motor vehicle exhaust system in particular a housing for a substrate, with a jacket which has a weld along its longitudinal axis, and on its
• Outside surface having a plurality of pairs of pressure points of the pressure jaws, wherein the weld is within the two pressure points of a pressure jaw.
• FIG. 1 shows schematically a first step of the invention
• FIG. 2 shows schematically a second step of the method according to the invention
• FIG. 3 shows schematically a third step of the method according to the invention.
• FIG. 4 shows schematically a fourth step of the method according to the invention.
• a tube 10 which consists of metal. It is made by bending and welding a sheet metal strip. Two of the longitudinal edges of the metal strip are connected by a weld 12.
• the tube 10 can be brought by a schematically indicated cutting tool 14 to the desired length.
• cutting tool is also understood to mean a laser cutting device This step can be omitted if the sheet metal strip already has the desired length before being bent.
• a plurality of sensors 16 are shown schematically, which scan the tube 10 to the position of the weld 12 out.
• the sensors 16 may scan the tube 10 inductively, optically, mechanically or in any other suitable manner.
• a single sensor may be used and the tube is rotated until the sensor detects the weld.
• Figure 3 is shown schematically that the position of the weld 12 is aligned in the circumferential direction in the desired manner.
• the tube 10 is mounted on two rollers, one of which acts as a support roller 18 and the other as a drive roller 20. This is driven by a motor 22, so that the tube 10 will rotate about its longitudinal axis, that the weld 12 on a certain position in the circumferential direction is considered.
• the amount and direction of rotation that the tube 10 must perform for this purpose depend on the previously detected position of the weld on the circumference of the tube.
• FIG 4 is shown schematically how the tube 10 is calibrated by means of pressure jaws 24.
• the pressure jaws 24 are around the circumference of the tube 10 around - A -
• a schematically illustrated substrate 26 with bearing mat 28 is fixedly mounted in the tube. Due to the orientation of the weld 12 is ensured that it is "below” a pressure jaw 24, preferably centrally.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Exhaust Silencers (AREA)
• Exhaust Gas After Treatment (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=37323100

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Family Cites Families (8)

• 2005
  • 2005-09-29 DE DE102005046767A patent/DE102005046767A1/de not_active Withdrawn
• 2006
  • 2006-09-26 EP EP06792263A patent/EP1933996A1/de not_active Withdrawn
  • 2006-09-26 KR KR1020087007933A patent/KR20080044320A/ko not_active Application Discontinuation
  • 2006-09-26 WO PCT/EP2006/009317 patent/WO2007036342A1/de active Application Filing
  • 2006-09-26 CN CNA2006800363545A patent/CN101277773A/zh active Pending

Non-Patent Citations (1)

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