US20090095044A1 - Method for prolonging service life of a machine for bending tubes - Google Patents

Method for prolonging service life of a machine for bending tubes Download PDF

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Publication number
US20090095044A1
US20090095044A1 US12/335,776 US33577608A US2009095044A1 US 20090095044 A1 US20090095044 A1 US 20090095044A1 US 33577608 A US33577608 A US 33577608A US 2009095044 A1 US2009095044 A1 US 2009095044A1
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United States
Prior art keywords
molybdenum
coating
less
flame spraying
molybdenum alloy
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Abandoned
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US12/335,776
Inventor
Peter Schule
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Individual
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Individual
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Priority to US12/335,776 priority Critical patent/US20090095044A1/en
Publication of US20090095044A1 publication Critical patent/US20090095044A1/en
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    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • the present invention relates to a tool on tube or profile bending machines.
  • folds may be produced on the inside of the bend as a result of upsetting of the material.
  • a tool the fold smoothing tool
  • This shaped piece can have different designs and is occasionally designated as a fold smoothing shell or fold smoothing shoe. It supports the tube on the inside of the forming zone in the direction of the part which has just been bent. During the bending, the tube is drawn with considerable pressure force via the fold smoothing tool, thereby resulting in considerable wear on the fold smoothing tool.
  • the fold smoothing tool To avoid the wear in the fold smoothing tool, it is protected with additional materials, such as, for example, aluminum bronze, beryllium bronze or other bronze materials. Nonetheless, the fold smoothing tool is impaired to a considerable extent and therefore has to be exchanged relatively frequently. Tests with lubricants, for example molybdenum lubricant or titanium nitrite or titanium carbon nitrite, were also unable to produce any substantial prolongation in service life.
  • the object of the present innovation is therefore to propose a means with which the service life of the tools on tube and profile bending machines can be prolonged.
  • a tool such as a fold smoothing tool, mandrel or guide rails, wherein a coating of molybdenum or of a molybdenum alloy is applied to at least the surface touching the tube or profile.
  • FIG. 1 shows a mandrel bending machine for bending tubes
  • FIG. 2 shows a fold smoothing tool having a protective coating in accordance with the present invention.
  • FIG. 1 A mandrel bending machine for bending tubes is shown in FIG. 1 .
  • the bending is effected by drawing the tube 1 by means of a clamp device 2 by rotating the die 3 .
  • a rail 4 and a fold smoothing tool 5 provide for the external guidance, and the displaceable mandrel 6 arranged in the interior prevents a change in the tube diameter.
  • Those surfaces of the rail 4 , of the fold smoothing tool 5 and of the mandrel 6 which come in contact with the tube are provided with a coating of molybdenum or molybdenum alloy.
  • FIG. 2 shows a fold smoothing tool 5 in which a protective coating 7 is applied to the surface 8 touching the tube.
  • a coating of molybdenum or of a molybdenum alloy is applied to that surface of a fold smoothing tool, a mandrel, rollers, guide aids, dies or guide rails which touches the tube.
  • This coating may be less than 0.1 mm and nonetheless produces a considerable prolongation in the service life.
  • the molybdenum is applied to the surface by means of a flame spray process, by electroplating or by vapor deposition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Wire Processing (AREA)

Abstract

A method for prolonging service life of a machine for bending tubes comprises flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a fold smoothing tool.

Description

    BACKGROUND OF THE INVENTION
  • The present invention relates to a tool on tube or profile bending machines.
  • During the bending of tubes by means of tube bending machines, in which the tubes are clamped in place and bent by drawing at the free end, folds may be produced on the inside of the bend as a result of upsetting of the material. In order to avoid this, a tool, the fold smoothing tool, is used for reducing the fold formation. This shaped piece can have different designs and is occasionally designated as a fold smoothing shell or fold smoothing shoe. It supports the tube on the inside of the forming zone in the direction of the part which has just been bent. During the bending, the tube is drawn with considerable pressure force via the fold smoothing tool, thereby resulting in considerable wear on the fold smoothing tool. To avoid the wear in the fold smoothing tool, it is protected with additional materials, such as, for example, aluminum bronze, beryllium bronze or other bronze materials. Nonetheless, the fold smoothing tool is impaired to a considerable extent and therefore has to be exchanged relatively frequently. Tests with lubricants, for example molybdenum lubricant or titanium nitrite or titanium carbon nitrite, were also unable to produce any substantial prolongation in service life.
  • In addition, during bending, mandrels, rollers, guide aids, dies and guide rails are also required, which are likewise highly stressed and therefore also have to be exchanged, even if not so frequently.
  • The object of the present innovation is therefore to propose a means with which the service life of the tools on tube and profile bending machines can be prolonged.
    • SUMMARY OF THE INVENTION
  • The foregoing object is achieved according to the invention by providing a tool, such as a fold smoothing tool, mandrel or guide rails, wherein a coating of molybdenum or of a molybdenum alloy is applied to at least the surface touching the tube or profile.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1: shows a mandrel bending machine for bending tubes; and
  • FIG. 2: shows a fold smoothing tool having a protective coating in accordance with the present invention.
    •  DETAILED DESCRIPTION
  • A mandrel bending machine for bending tubes is shown in FIG. 1. Here, the bending is effected by drawing the tube 1 by means of a clamp device 2 by rotating the die 3. A rail 4 and a fold smoothing tool 5 provide for the external guidance, and the displaceable mandrel 6 arranged in the interior prevents a change in the tube diameter. Those surfaces of the rail 4, of the fold smoothing tool 5 and of the mandrel 6 which come in contact with the tube are provided with a coating of molybdenum or molybdenum alloy.
  • FIG. 2, by way of example, shows a fold smoothing tool 5 in which a protective coating 7 is applied to the surface 8 touching the tube.
  • According to the present invention, a coating of molybdenum or of a molybdenum alloy is applied to that surface of a fold smoothing tool, a mandrel, rollers, guide aids, dies or guide rails which touches the tube. This coating may be less than 0.1 mm and nonetheless produces a considerable prolongation in the service life. The molybdenum is applied to the surface by means of a flame spray process, by electroplating or by vapor deposition.

Claims (19)

1-2. (canceled)
3. A method for prolonging service life of a machine for bending tubes, the method comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a fold smoothing tool.
4. The method of claim 3, further comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a mandrel.
5. The method of claim 3, further comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more rollers.
6. The method of claim 3, further comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide aids.
7. The method of claim 3, further comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more dies.
8. The method of claim 3, further comprising flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide rails.
9. A method for prolonging service life of a machine for bending tubes, the method consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a fold smoothing tool.
10. The method of claim 9, further consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a mandrel.
11. The method of claim 9, further consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more rollers.
12. The method of claim 9, further consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide aids.
13. The method of claim 9, further consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more dies.
14. The method of claim 9, further consisting of flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide rails.
15. A method for prolonging service life of a machine for bending tubes, the method comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a fold smoothing tool.
16. The method of claim 15, further comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a mandrel.
17. The method of claim 15, further comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more rollers.
18. The method of claim 15, further comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide aids.
19. The method of claim 15, further comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more dies.
20. The method of claim 15, further comprising electroplating or vapor depositing a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of one or more guide rails.
US12/335,776 2001-05-22 2008-12-16 Method for prolonging service life of a machine for bending tubes Abandoned US20090095044A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/335,776 US20090095044A1 (en) 2001-05-22 2008-12-16 Method for prolonging service life of a machine for bending tubes

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10124866A DE10124866A1 (en) 2001-05-22 2001-05-22 Tool for bending machine
DE10124866.0 2001-05-22
US10/478,392 US20040154366A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine
PCT/DE2002/001774 WO2002094468A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine
US12/335,776 US20090095044A1 (en) 2001-05-22 2008-12-16 Method for prolonging service life of a machine for bending tubes

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
PCT/DE2002/001774 Division WO2002094468A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine
US10/478,392 Division US20040154366A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine

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US20090095044A1 true US20090095044A1 (en) 2009-04-16

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US10/478,392 Abandoned US20040154366A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine
US12/335,776 Abandoned US20090095044A1 (en) 2001-05-22 2008-12-16 Method for prolonging service life of a machine for bending tubes

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US10/478,392 Abandoned US20040154366A1 (en) 2001-05-22 2002-05-17 Tool for a bending machine

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US (2) US20040154366A1 (en)
EP (1) EP1389149B1 (en)
JP (1) JP2004528480A (en)
AT (1) ATE296172T1 (en)
DE (2) DE10124866A1 (en)
ES (1) ES2243739T3 (en)
PT (1) PT1389149E (en)
WO (1) WO2002094468A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2509919A (en) * 2013-01-16 2014-07-23 Olicana Products Improvements in tube bending machines
CN105935711A (en) * 2016-07-10 2016-09-14 江苏凯宇不锈钢制品有限公司 Preparation technology of stainless steel coil pipes
US11047629B2 (en) 2016-11-11 2021-06-29 Marelli Cabin Comfort Japan Corporation Fin-assembled tube manufacturing method and double tube manufacturing method

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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DE602004007465T2 (en) * 2003-12-26 2007-10-31 Calsonic Kansei Corp. Apparatus and method for bending multi-chamber pipes
DE102004034638B4 (en) * 2004-07-16 2014-03-20 Volkswagen Ag Bending device for pipes
JP2007203366A (en) * 2006-02-06 2007-08-16 Daikin Ind Ltd Bending method, and bending device
FR2909910B1 (en) * 2006-12-19 2009-01-30 Renault Sas DEVICE FOR BENDING A METALLIC TUBE BY WINDING ON A SHAPE ROD.
DE102007032804B3 (en) * 2007-07-10 2008-09-04 V&M Deutschland Gmbh Forging mandrel for hot-forging of tubular work-pieces made of metal has a mandrel body made from heat-resistant material and a mandrel rod
US7594417B1 (en) * 2008-08-15 2009-09-29 Gm Global Technology Operations, Inc. Apparatus for wiper die monitoring
CN104056886B (en) * 2014-06-26 2016-04-13 威海石岛重工有限公司 A kind of swan neck system
JP6502912B2 (en) * 2016-11-11 2019-04-17 カルソニックカンセイ株式会社 Method and apparatus for manufacturing fin-incorporated tube
JP6474856B2 (en) * 2017-06-05 2019-02-27 東亜工業株式会社 Pipe material bending method and pipe material bending apparatus
DE102020202347A1 (en) 2020-02-24 2021-08-26 Wafios Aktiengesellschaft Feed device for forming machine

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US3456482A (en) * 1966-10-03 1969-07-22 Teledyne Inc Method and apparatus for draw forming tubes and the like including mandrels therefor
DE2402918A1 (en) * 1973-02-28 1974-09-12 Dema Dettwiler & Maeder Metall Molybdenum coating on extruder feed screws - for increased life of running edge when extruding plastics
US3914178A (en) * 1974-01-23 1975-10-21 Amerace Corp Wear reducing coating
US4214762A (en) * 1978-08-03 1980-07-29 Ramsey Corporation Rolled metal piston ring

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Publication number Priority date Publication date Assignee Title
US3024128A (en) * 1955-11-14 1962-03-06 Dawson Armoring Company Method of coating metal article with hard particles
US3456482A (en) * 1966-10-03 1969-07-22 Teledyne Inc Method and apparatus for draw forming tubes and the like including mandrels therefor
DE2402918A1 (en) * 1973-02-28 1974-09-12 Dema Dettwiler & Maeder Metall Molybdenum coating on extruder feed screws - for increased life of running edge when extruding plastics
US3914178A (en) * 1974-01-23 1975-10-21 Amerace Corp Wear reducing coating
US4214762A (en) * 1978-08-03 1980-07-29 Ramsey Corporation Rolled metal piston ring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2509919A (en) * 2013-01-16 2014-07-23 Olicana Products Improvements in tube bending machines
GB2509919B (en) * 2013-01-16 2015-04-29 Olicana Products Improvements in tube bending machines
CN105935711A (en) * 2016-07-10 2016-09-14 江苏凯宇不锈钢制品有限公司 Preparation technology of stainless steel coil pipes
US11047629B2 (en) 2016-11-11 2021-06-29 Marelli Cabin Comfort Japan Corporation Fin-assembled tube manufacturing method and double tube manufacturing method

Also Published As

Publication number Publication date
DE50203204D1 (en) 2005-06-30
ES2243739T3 (en) 2005-12-01
EP1389149B1 (en) 2005-05-25
PT1389149E (en) 2005-10-31
DE10124866A1 (en) 2002-12-05
EP1389149A1 (en) 2004-02-18
WO2002094468A1 (en) 2002-11-28
US20040154366A1 (en) 2004-08-12
ATE296172T1 (en) 2005-06-15
JP2004528480A (en) 2004-09-16

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