EP0028809A1 - Procédé et dispositifs de dudgeonnage de tubes revêtus à l'intérieur - Google Patents

Procédé et dispositifs de dudgeonnage de tubes revêtus à l'intérieur Download PDF

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Publication number
EP0028809A1
EP0028809A1 EP80106822A EP80106822A EP0028809A1 EP 0028809 A1 EP0028809 A1 EP 0028809A1 EP 80106822 A EP80106822 A EP 80106822A EP 80106822 A EP80106822 A EP 80106822A EP 0028809 A1 EP0028809 A1 EP 0028809A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
tube
unexpanded
rolling
pipe
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
EP80106822A
Other languages
German (de)
English (en)
Other versions
EP0028809B1 (fr
Inventor
Theo Cyron
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.)
CYRON, THEO
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT80106822T priority Critical patent/ATE13745T1/de
Publication of EP0028809A1 publication Critical patent/EP0028809A1/fr
Application granted granted Critical
Publication of EP0028809B1 publication Critical patent/EP0028809B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in

Definitions

  • the invention relates generically to methods for rolling a tube coated on the inside with a plastic protective layer into a bore associated with this tube, the diameter of which is larger than the outside diameter of the tube.
  • the end of the tube to be rolled is inserted, for example, into one of numerous bores in a tube sheet and expanded and rolled in over part of its end by a rotatable roll-in tool by means of roll-in rollers distributed over its circumference.
  • the invention also relates to devices for performing these methods.
  • German Auslegeschrift 11 22 031 a method for rolling is proposed of tubes in tube plates, in which "before the fastening of the tubes in the tube plates, the corrosion protective layer of the tubes is less by a metal sleeve wall thickness, eg of 0.2 -.. 0, 25 mm, is covered in the area of the fastening surfaces and the pipes are then fastened in the tube sheets in a manner known per se by the action of the fastening forces, for example rolling-in pressures, on the metal sleeve. " There is also mentioned that "for example a brass sleeve which (presumably for examination purposes), after the rolling is removed, the thin protective plastic coating layer of 20 -. 50 g.
  • the object of the present invention is to carry out the above-mentioned process in such a way that no sleeves remain in the tube and the protective layer is not damaged, even when working with considerable expansion and with considerable rolling-in forces and high rolling-in speed. It is also an object of the present invention to provide suitable sleeves and devices for removing the sleeves.
  • the method according to the first claim is based on a sleeve which is longer than the roll-in rollers and which is only expanded over part of its length. This leaves a part of this sleeve with the original and therefore precisely defined dimensions after the sleeve has been rolled in and expanded. In this part, which is not changed by accidental differences when rolling in, a mandrel with small tolerances can be inserted, which centers the pull-out device, with which the thin-walled sleeve, which is therefore sensitive to buckling or buckling, can be removed properly.
  • the method according to the second claim uses a pull-out device which has a circumferential projection at its end which is further away from the pipe mouth.
  • This pull-out device is inserted into the tube before the sleeve is inserted and rests there outside the roll-in area.
  • the sleeve is then inserted and expanded at its end adjacent to the pipe mouth.
  • the extractor is pulled out of the tube and presses with the circumferential projection on the unexpanded end of the sleeve. Since the mandrel lies in this part of the sleeve with small tolerances, the pressure of the projection is distributed evenly over the circumference of the thin-walled sleeve, so that it cannot dent or buckle. With the dimensioning of the mandrel specified in the second claim, it is achieved that the mentioned projection does not touch the internally coated tube and thus cannot damage the coating.
  • the sleeve is first inserted into the pipe and widened at its end adjacent to the pipe mouth.
  • the rolling-in device is then removed and a pull-out device is inserted, which not only has a cylindrical mandrel with small tolerances at its end which is more distant from the pipe end, but also a plurality of resilient projections in the radial direction which can grip the unexpanded edge of the sleeve.
  • the specified dimensioning of the projections ensures that they cannot damage the inner coating of the tube.
  • the sleeve is not fully inserted into the tube and, accordingly, is not widened at the projecting end. After rolling in and after removing the rolling device, the sleeve is gripped at its protruding end and pulled out. This method is particularly suitable for very thin-walled sleeves, which can no longer be grasped perfectly even with the projections mentioned above.
  • sleeves that are approximately 25 to 30% longer than the roll-in rolls.
  • the outside diameter of these sleeves should be at least 0.5 mm smaller than the inside diameter of the unexpanded coated pipe.
  • the sleeve proposed in the fifth claim avoids damage to the inside coating of the tube during rolling. If the sleeve material had a lower strength than the tube, the sleeve would also flow in the longitudinal direction of the tube during rolling and would destroy the coating lying between the tube and the sleeve due to the relative movement triggered under high radial pressure.
  • the sleeve proposed in the sixth and seventh claims for different materials distributes the pressure forces emanating from the roll-in rollers during expansion and roll-in by the interposition of the metallic sleeve wall so advantageously onto the inner coating of the tube that this coating is used both in the roll-in area and in the transition zone undeformed area of the pipe does not cause any damage.
  • This also applies to the roll-in speeds as are customary and possible with uncoated pipes and to adhesive expansions of more than 35% of the pipe wall thickness.
  • the following is defined as the widening of the adhesion: the increase in the inner diameter of the pipe caused by rolling in, measured from the placement of the pipe in the bore to the final widening, as a percentage of the pipe wall thickness.
  • This expansion is intended to generate a tension pressure between the tube and the tube sheet, which the tube also under external pressure, when heating or expanding in the longitudinal direction seals properly in the tube sheet.
  • the sleeve wall thickness should not be less than 0.5 mm so that the protective layer remains undamaged.
  • the sleeve wall thickness should be about 1 mm.
  • the device proposed in the eighth claim serves to remove the sleeve according to the method proposed in the second claim.
  • the circumferential protrusion together with the mandrel that lies closely against the unexpanded part of the sleeve, serves to introduce the forces, which are very high in relation to the buckling stability of the thin-walled sleeve, to overcome the adhesive strength in an axially parallel and centric manner, and thus wedging by buckling or buckling to prevent the sleeve to be pressed out of the internally coated tube.
  • the unexpanded and thus always dimensionally accurate inner diameter of the sleeve allows an accurate guide on the outside diameter of the mandrel, wherein the circumferential protrusion proposed the necessary A usdschreib law clearly centrally and evenly distributed around the periphery of the relatively thin sleeve wall applies and transmits power flow favorably over the conical part of the transition zone to the roll-in area of the sleeve, which is under high ring compressive stress, so that it can be removed from the rolled-in pipe end without deformation and without damaging the coating. Since the circumferential projection is smaller in diameter than the unexpanded coated tube, contact between the projection and the coating is also avoided, and damage to the coating during removal is thus prevented.
  • the device proposed in the ninth claim serves to carry out the method according to the third claim.
  • the mandrel serves to secure the unexpanded end of the sleeve against buckling or buckling and to allow the protrusions which are resilient in the radial direction to act on the sleeve evenly distributed over the circumference.
  • the device proposed in the tenth claim is used to carry out the method according to the fourth claim.
  • the mandrel serves to center the pull-out device on the sleeve and to protect the sleeve against being compressed by the segments acting from the outside.
  • Figure 1 shows a bore 1 in a tube sheet 2 of a heat exchanger.
  • a tube 4 coated on the inside with a thermosetting corrosion protection layer 3 is inserted flush with its end 5 to be rolled into the bore 1 of the tube sheet 2.
  • the enlarged section in FIG. 1 makes the coating clear.
  • the sleeve 6, which is also flush with the face of the internally coated tube 4, is first pushed onto the rolling tool 8 up to a stop in order to clearly fix and hold its position in relation to the rolling-in area E and is stretched polygonally by spreading the pressure rollers 7 according to the number of rollers.
  • the roll-in area E can also cover the entire thickness of the tube sheet 2.
  • FIG. 2 shows the situation after the rolling in and before the sleeve 6 is pulled out.
  • the mandrel 14 of the extraction tool 15 is moved from the right into the unexpanded part 17 of the sleeve 6 to the collar with a pull rod 16 from the opening of the rolled-in tube 18 introduced, the mating surfaces 19 take over the central guidance of the mandrel 14.
  • the sleeve 6 only requires careful smoothing of the outer surface, as can be achieved with the usual manufacturing techniques for fine machining.
  • very high surface qualities, such as z. B. can be achieved by electrochemical polishing are procedurally advantageous.
  • the application of a high-pressure lubricating film to the outer surface of the sleeve 6 can also significantly promote the process for removing the protective sleeve by reducing the adhesive sliding forces.
  • FIG. 3 corresponds to FIG. 2 with the difference that in this example the mandrel 20 is inserted from the left into the unexpanded part 17 of the sleeve 6 via the mating surfaces 19 and resilient cams 21 behind the collar 18 of the sleeve 6 at the end of the insertion path grasp that transmit the axial pull-out force clearly centered and evenly distributed to part 17 of the protective sleeve 6.
  • FIG. 4 shows the finished state of the rolled-in internally coated tube.
  • the gap 2 indicated there can be avoided by appropriate dimensioning of the rolled-in area E.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
EP80106822A 1979-11-08 1980-11-05 Procédé et dispositifs de dudgeonnage de tubes revêtus à l'intérieur Expired EP0028809B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106822T ATE13745T1 (de) 1979-11-08 1980-11-05 Verfahren und einrichtungen zum einwalzen von innenseitig beschichteten rohren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792945085 DE2945085A1 (de) 1979-11-08 1979-11-08 Verfahren und einrichtungen zum einwalzen von innenseitig beschichteten rohren
DE2945085 1979-11-08

Publications (2)

Publication Number Publication Date
EP0028809A1 true EP0028809A1 (fr) 1981-05-20
EP0028809B1 EP0028809B1 (fr) 1985-06-12

Family

ID=6085459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106822A Expired EP0028809B1 (fr) 1979-11-08 1980-11-05 Procédé et dispositifs de dudgeonnage de tubes revêtus à l'intérieur

Country Status (3)

Country Link
EP (1) EP0028809B1 (fr)
AT (1) ATE13745T1 (fr)
DE (2) DE2945085A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191663A2 (fr) * 1985-01-29 1986-08-20 Grumman Aerospace Corporation Procédé automatique pour la déformation à froid de trous
FR2592147A1 (fr) * 1985-12-23 1987-06-26 Stein Industrie Dispositif de controle de debit dans un tube d'echangeur de chaleur.
FR2609330A2 (fr) * 1985-12-23 1988-07-08 Stein Industrie Dispositif de controle de debit dans un tube d'echangeur de chaleur
WO2008106911A1 (fr) * 2007-03-07 2008-09-12 Salzgitter Mannesmann Präzisrohr GmbH Procédé de fabrication d'un tube accumulateur de haute pression en acier pour des systèmes d'injection de carburant et tube accumulateur de haute pression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800910A1 (de) * 1998-01-14 1999-07-15 Itc Rohrtechnik Gmbh Rohrverbindungsverfahren und Vorrichtung zur Durchführung derselben

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629505A (en) * 1947-11-10 1949-09-21 Serck Radiators Ltd Means for extracting ferrules from the tubes of heat interchange apparatus
US2545527A (en) * 1947-06-21 1951-03-20 Babcock & Wilcox Co Method of forming an expanded tube and tube seat connection with an intervening metallic bonding stratum of low fusion temperature
US2556481A (en) * 1945-12-06 1951-06-12 Earl Lincoln Hydraulic jack
US2573567A (en) * 1949-06-11 1951-10-30 William L Ruhle Pump and ram hydraulic lifting device
US2617181A (en) * 1948-04-07 1952-11-11 Chicago Pneumatic Tool Co Cylinder sleeve puller
DE1122031B (de) * 1958-09-12 1962-01-18 Hubert Salmen Verfahren zum Befestigen von Rohren in Waenden, wie Einwalzen von Kondensatorrohren in Kondensatorboeden
US3057631A (en) * 1958-11-12 1962-10-09 Pittsburgh Plate Glass Co Tube extractor
US3241223A (en) * 1964-04-10 1966-03-22 Oliver B Anderson Bearing puller having grippers parallel to a screw element
US3945104A (en) * 1975-04-25 1976-03-23 Brookover Jr William S Diesel engine cylinder liner puller tool
GB2000996A (en) * 1977-07-14 1979-01-24 United Aircraft Prod Making mechanical tube joints

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556481A (en) * 1945-12-06 1951-06-12 Earl Lincoln Hydraulic jack
US2545527A (en) * 1947-06-21 1951-03-20 Babcock & Wilcox Co Method of forming an expanded tube and tube seat connection with an intervening metallic bonding stratum of low fusion temperature
GB629505A (en) * 1947-11-10 1949-09-21 Serck Radiators Ltd Means for extracting ferrules from the tubes of heat interchange apparatus
US2617181A (en) * 1948-04-07 1952-11-11 Chicago Pneumatic Tool Co Cylinder sleeve puller
US2573567A (en) * 1949-06-11 1951-10-30 William L Ruhle Pump and ram hydraulic lifting device
DE1122031B (de) * 1958-09-12 1962-01-18 Hubert Salmen Verfahren zum Befestigen von Rohren in Waenden, wie Einwalzen von Kondensatorrohren in Kondensatorboeden
US3057631A (en) * 1958-11-12 1962-10-09 Pittsburgh Plate Glass Co Tube extractor
US3241223A (en) * 1964-04-10 1966-03-22 Oliver B Anderson Bearing puller having grippers parallel to a screw element
US3945104A (en) * 1975-04-25 1976-03-23 Brookover Jr William S Diesel engine cylinder liner puller tool
GB2000996A (en) * 1977-07-14 1979-01-24 United Aircraft Prod Making mechanical tube joints
DE2830690A1 (de) * 1977-07-14 1979-02-01 United Aircraft Prod Verfahren und vorrichtung zur herstellung mechanischer rohrverbindungen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191663A2 (fr) * 1985-01-29 1986-08-20 Grumman Aerospace Corporation Procédé automatique pour la déformation à froid de trous
EP0191663A3 (fr) * 1985-01-29 1988-07-20 Grumman Aerospace Corporation Procédé automatique pour la déformation à froid de trous
FR2592147A1 (fr) * 1985-12-23 1987-06-26 Stein Industrie Dispositif de controle de debit dans un tube d'echangeur de chaleur.
EP0232527A1 (fr) * 1985-12-23 1987-08-19 STEIN INDUSTRIE Société Anonyme dite: Dispositif de contrôle de débit dans un tube d'échangeur de chaleur
US4735263A (en) * 1985-12-23 1988-04-05 Stein Industrie Flow control device for heat exchanger tube
FR2609330A2 (fr) * 1985-12-23 1988-07-08 Stein Industrie Dispositif de controle de debit dans un tube d'echangeur de chaleur
WO2008106911A1 (fr) * 2007-03-07 2008-09-12 Salzgitter Mannesmann Präzisrohr GmbH Procédé de fabrication d'un tube accumulateur de haute pression en acier pour des systèmes d'injection de carburant et tube accumulateur de haute pression
US8918982B2 (en) 2007-03-07 2014-12-30 Salzgitter Mannesmann Precision Gmbh Method for the production of a high-pressure accumulator pipe of steel for fuel injection systems and high-pressure accumulator pipe produced according to this method

Also Published As

Publication number Publication date
EP0028809B1 (fr) 1985-06-12
DE2945085A1 (de) 1981-05-21
ATE13745T1 (de) 1985-06-15
DE3070758D1 (en) 1985-07-18

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