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US20100251794A1 - Forging mandrel for hot-forging tubular workpieces of metal - Google Patents

Forging mandrel for hot-forging tubular workpieces of metal Download PDF

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Publication number
US20100251794A1
US20100251794A1 US12/668,282 US66828208A US2010251794A1 US 20100251794 A1 US20100251794 A1 US 20100251794A1 US 66828208 A US66828208 A US 66828208A US 2010251794 A1 US2010251794 A1 US 2010251794A1
Authority
US
United States
Prior art keywords
mandrel
forging
layer
mandrel body
thermal conductivity
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.)
Abandoned
Application number
US12/668,282
Other languages
English (en)
Inventor
Stefan Wiedenmaier
Rolf Kümmerling
Gerd Homberg
Pierre Lefebvre
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.)
Vallourec Deutschland GmbH
Original Assignee
V&M Deutschland 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39670381&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20100251794(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by V&M Deutschland GmbH filed Critical V&M Deutschland GmbH
Assigned to V & M DEUTSCHLAND GMBH reassignment V & M DEUTSCHLAND GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOMBERG, GERD, KUEMMERLING, ROLF, LEFEBVRE, PIERRE, WIEDENMAIER, STEFAN
Publication of US20100251794A1 publication Critical patent/US20100251794A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • 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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group

Definitions

  • the invention relates to a forging mandrel for hot-forging tubular workpieces of metal according to the preamble of patent claim 1 .
  • Hot-forming of tubular workpieces is known from DE 10 2005 052 178 A1.
  • this method involves a first forming step in which a thick-walled hollow block is produced through punching and then forged into a seamless pipe by a radial forging process which uses a forging mandrel as internal tool which is pushed into the hollow block and at least two forging jaws of a forging machine to act on the outer surface area of the hollow block.
  • the hollow block is hereby turned and shifted axially in clocked manner in the phase of the idle stroke of the forging jaws.
  • the forging mandrel is exposed during the forging process to significant thermal and mechanical stress, causing wear of the tool surface and decreasing the service life of the forging mandrel. Forging temperatures of above 1300° C. may occur for example.
  • This forging mandrel suffers several drawbacks. On the one hand, this forging mandrel is very complex and expensive to manufacture. On the other hand, heat introduction into the mandrel material is not diminished so that the shape stability of the forging mandrel is reduced, when exposed to high temperature stress and thus causes premature failure.
  • the mandrel material is made of heat-resistant alloy, with the mandrel body provided at least in the work zone with a layer which lessens heat dissipation into the mandrel body during forging and adheres firmly upon the mandrel body and which has a thickness of at least 50 ⁇ m.
  • the essential novelty of this invention resides in that the layer which surrounds the mandrel body has a lower thermal conductivity than the mandrel body so that heat introduction into the mandrel body is significantly decreased to thereby realize a significantly improved shape stability, even when exposed to high forging temperatures.
  • the layer has hereby in accordance with the invention a heat conductivity which is significantly lower than the one of the material of the mandrel body, advantageously by at least 50%.
  • the layer on the mandrel body can be advantageously produced according to the invention in a very cost-effective way through oxidation or also through application of a respective layer, e.g. through thermal methods.
  • Oxidizing the mandrel is advantageously applied when carbon steels are involved, whereas high-alloy mandrel materials involve application of the layer advantageously through thermal spraying processes, such as, e.g., flame-spraying or plasma spraying.
  • the thermally applied layers may hereby contain zirconium oxide, aluminum oxide, or iron oxide, for example.
  • thermal conductivity of the coating material is always significantly below the one of the mandrel material.
  • the layer In order for the layer to be able to exert a recognizable effect with respect to a significantly reduced heat introduction into the mandrel body, it is advantageous when the layer has a minimum thickness of about 50 ⁇ m.
  • the forging mandrel according to the invention has hereby not only the advantages with respect to improved shape stability but also with respect to a decrease of the abrasive wear. Tests have shown the presence of a certain lubricating effect of the layer material during forging to reduce the abrasive wear.
  • a suitable material for the mandrel body it is essential to suit the mandrel body to the material being forged in such a way that fusion of forging mandrel and forging workpiece is prevented.
  • the forging mandrel according to the invention has hereby the beneficial effect that the layer acts upon the mandrel body as a separation layer which opposes a fusion under forging pressure and temperature.
  • it may also be provided to cool the outside of the mandrel body in phases of standstill. This can be implemented in a much more cost-efficient manner than internal cooling.
  • the forging mandrel shown in the sole FIGURE has a mandrel body 1 provided with bevels 3 , 4 and secured to a restraining bar 2 .
  • the restraining bar 2 is required to be able to move the forging mandrel in axial and rotatable relationship in a tubular workpiece, not shown here.
  • the forging mandrel 1 is made of heat-resistant steel which is provided in accordance with the invention with a layer 5 which reduces in the work zone the heat introduction into the mandrel body 1 .
  • the layer 5 has hereby a thermal conductivity which is significantly lower than the one of the material of the mandrel body 1 in order to reduce heat introduction and thus to ensure the shape stability of the mandrel body 1 , even when exposed to high forging temperatures.
  • the mandrel body 1 is configured as solid body in the present case; it is, however, also possible to provide the mandrel body with internal cooling to dissipate as rapidly as possible unavoidable heat introduction into the mandrel body 1 during forging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Coating By Spraying Or Casting (AREA)
US12/668,282 2007-07-10 2008-06-25 Forging mandrel for hot-forging tubular workpieces of metal Abandoned US20100251794A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007032804.6 2007-07-10
DE102007032804A DE102007032804B3 (de) 2007-07-10 2007-07-10 Schmiededorn zum Warmschmieden rohrförmiger Werkstücke aus Metall
PCT/DE2008/001067 WO2009006873A1 (de) 2007-07-10 2008-06-25 Schmiededorn zum warmschmieden rohrförmiger werkstücke aus metall

Publications (1)

Publication Number Publication Date
US20100251794A1 true US20100251794A1 (en) 2010-10-07

Family

ID=39670381

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/668,282 Abandoned US20100251794A1 (en) 2007-07-10 2008-06-25 Forging mandrel for hot-forging tubular workpieces of metal

Country Status (17)

Country Link
US (1) US20100251794A1 (pt)
EP (1) EP2176013B1 (pt)
JP (1) JP2010532715A (pt)
KR (1) KR20100030628A (pt)
CN (1) CN101743077B (pt)
AR (1) AR067462A1 (pt)
AT (1) ATE485903T1 (pt)
AU (1) AU2008274744B2 (pt)
BR (1) BRPI0812826A2 (pt)
CA (1) CA2693450A1 (pt)
DE (2) DE102007032804B3 (pt)
EA (1) EA015221B1 (pt)
ES (1) ES2355125T3 (pt)
PL (1) PL2176013T3 (pt)
UA (1) UA96053C2 (pt)
WO (1) WO2009006873A1 (pt)
ZA (1) ZA200908608B (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130036785A1 (en) * 2011-08-12 2013-02-14 Gfm-Gmbh Apparatus for forging a hollow body
US9248483B2 (en) 2009-11-02 2016-02-02 Vallourec Deutschland Gmbh Method and device for the optimized circulation of rods in the production of a seamlessly hot-fabricated steel pipe according to the continuous pipe method
US11122741B2 (en) * 2018-01-30 2021-09-21 Cnh Industrial America Llc Stalk roller assembly for an agricultural system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2241386A1 (de) * 2009-04-16 2010-10-20 Felss GmbH Umformwerkzeug zur Herstellung eines Innenprofils, insbesondere einer Innenverzahnung, eines Werkstücks
AT511745B1 (de) * 2011-08-12 2014-09-15 Gfm Gmbh Vorrichtung zum schmieden eines hohlkörpers
DE102013219310A1 (de) 2013-09-25 2015-03-26 Gfm Gmbh Verfahren zum Warmschmieden eines nahtlosen Hohlkörpers aus schwer umformbarem Werkstoff, insbesondere aus Stahl
CN104275363A (zh) * 2013-11-30 2015-01-14 阜新华通管道有限公司 高温高压管件用无缝钢管随形胎锻造方法
JP6521369B2 (ja) * 2015-05-11 2019-05-29 日立金属株式会社 熱間鍛造用金型

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393677A (en) * 1979-12-25 1983-07-19 Nippon Kokan Kabushiki Kaisha Plugs for use in piercing and elongating mills
US20040154366A1 (en) * 2001-05-22 2004-08-12 Peter Schule Tool for a bending machine
US20070006626A1 (en) * 2004-03-11 2007-01-11 Tomio Yamakawa Seamless tube piercing/rolling plug, seamless tube piercing/rolling apparatus, and seamless tube producing method therewith
US7587923B1 (en) * 2006-07-12 2009-09-15 Raul Garza Method of making a tubular
US7861565B2 (en) * 2006-12-28 2011-01-04 Sumitomo Metal Industries, Ltd. Method for applying lubricant onto mandrel bar, method for controlling thickness of lubricant film on mandrel bar, and method for manufacturing seamless steel pipe
US20120210761A1 (en) * 2009-03-03 2012-08-23 Sumitomo Metal Industries, Ltd. Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT350356B (de) * 1977-08-30 1979-05-25 Gfm Fertigungstechnik Schmiededorn
JPS61110770A (ja) * 1984-11-01 1986-05-29 Sumitomo Electric Ind Ltd 熱間加工用超硬合金工具
JPH01135143U (pt) * 1988-03-09 1989-09-14
CA2025302A1 (en) * 1989-12-26 1991-06-27 John R. Rairden, Iii Reinforced microlaminted metal-matrix-composite structure
JP3191008B2 (ja) * 1991-04-04 2001-07-23 日立金属株式会社 熱間工具鋼
JP3124442B2 (ja) * 1994-06-21 2001-01-15 新日本製鐵株式会社 傾斜機能を有する鍛造用工具及びその製造方法
CN2458107Y (zh) * 2000-12-27 2001-11-07 中国科学院广州能源研究所 一种锻模的电辐射预热装置
JP2004066246A (ja) * 2002-08-01 2004-03-04 Osg Corp 球面バニッシュ転造丸ダイス、及び、その製造方法
JP2004255429A (ja) * 2003-02-26 2004-09-16 Honda Motor Co Ltd 高ヤング率高疲労強度鋼の加工方法
CN2657903Y (zh) * 2003-12-11 2004-11-24 株洲时代新材料科技股份有限公司 中大型橡胶模具加热器
DE102005052178B4 (de) * 2004-10-25 2008-06-19 V&M Deutschland Gmbh Verfahren zum Herstellen eines nahtlos warmgefertigten Stahlrohres
CN100358652C (zh) * 2005-12-06 2008-01-02 武汉理工大学 一种热锻模及其制备方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393677A (en) * 1979-12-25 1983-07-19 Nippon Kokan Kabushiki Kaisha Plugs for use in piercing and elongating mills
US20040154366A1 (en) * 2001-05-22 2004-08-12 Peter Schule Tool for a bending machine
US20070006626A1 (en) * 2004-03-11 2007-01-11 Tomio Yamakawa Seamless tube piercing/rolling plug, seamless tube piercing/rolling apparatus, and seamless tube producing method therewith
US20080134742A1 (en) * 2004-03-11 2008-06-12 Tomio Yamakawa Seamless tube piercing/rolling plug, and seamless tube producing method using same
US7506526B2 (en) * 2004-03-11 2009-03-24 Sumitomo Metal Industries, Ltd. Seamless tube piercing/rolling plug, and seamless tube producing method using same
US7587923B1 (en) * 2006-07-12 2009-09-15 Raul Garza Method of making a tubular
US7861565B2 (en) * 2006-12-28 2011-01-04 Sumitomo Metal Industries, Ltd. Method for applying lubricant onto mandrel bar, method for controlling thickness of lubricant film on mandrel bar, and method for manufacturing seamless steel pipe
US20120210761A1 (en) * 2009-03-03 2012-08-23 Sumitomo Metal Industries, Ltd. Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same
US8544306B2 (en) * 2009-03-03 2013-10-01 Nippon Steel & Sumitomo Metal Corporation Plug, piercing-rolling mill, and method of producing seamless tube by using the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9248483B2 (en) 2009-11-02 2016-02-02 Vallourec Deutschland Gmbh Method and device for the optimized circulation of rods in the production of a seamlessly hot-fabricated steel pipe according to the continuous pipe method
US20130036785A1 (en) * 2011-08-12 2013-02-14 Gfm-Gmbh Apparatus for forging a hollow body
US9409226B2 (en) * 2011-08-12 2016-08-09 Gfm-Gmbh Apparatus for forging a hollow body
US11122741B2 (en) * 2018-01-30 2021-09-21 Cnh Industrial America Llc Stalk roller assembly for an agricultural system
US20220000027A1 (en) * 2018-01-30 2022-01-06 Cnh Industrial America Llc Stalk roller assembly for an agricultural system
US12075726B2 (en) * 2018-01-30 2024-09-03 Cnh Industrial America Llc Stalk roller assembly for an agricultural system

Also Published As

Publication number Publication date
PL2176013T3 (pl) 2011-05-31
BRPI0812826A2 (pt) 2014-12-09
ATE485903T1 (de) 2010-11-15
EP2176013B1 (de) 2010-10-27
KR20100030628A (ko) 2010-03-18
AR067462A1 (es) 2009-10-14
AU2008274744A1 (en) 2009-01-15
EA015221B1 (ru) 2011-06-30
UA96053C2 (ru) 2011-09-26
DE502008001670D1 (de) 2010-12-09
DE102007032804B3 (de) 2008-09-04
JP2010532715A (ja) 2010-10-14
ZA200908608B (en) 2011-02-23
AU2008274744A2 (en) 2010-04-15
AU2008274744B2 (en) 2011-07-14
ES2355125T3 (es) 2011-03-23
CN101743077B (zh) 2011-07-13
CA2693450A1 (en) 2009-01-15
CN101743077A (zh) 2010-06-16
EP2176013A1 (de) 2010-04-21
WO2009006873A1 (de) 2009-01-15
EA201000187A1 (ru) 2010-06-30
WO2009006873A9 (de) 2010-01-21

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Legal Events

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AS Assignment

Owner name: V & M DEUTSCHLAND GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WIEDENMAIER, STEFAN;KUEMMERLING, ROLF;HOMBERG, GERD;AND OTHERS;REEL/FRAME:024430/0287

Effective date: 20100106

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION