US20130327107A1 - Hot work tool and method for producing same - Google Patents

Hot work tool and method for producing same Download PDF

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Publication number
US20130327107A1
US20130327107A1 US13/576,875 US201113576875A US2013327107A1 US 20130327107 A1 US20130327107 A1 US 20130327107A1 US 201113576875 A US201113576875 A US 201113576875A US 2013327107 A1 US2013327107 A1 US 2013327107A1
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US
United States
Prior art keywords
coating
tool
machine
base body
mandrel
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
US13/576,875
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English (en)
Inventor
Kazim Serin
Hans Joachim Pehle
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.)
SMS Group GmbH
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
Assigned to SMS MEER GMBH reassignment SMS MEER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PEHLE, HANS JOACHIM, SERIN, KAZIM
Publication of US20130327107A1 publication Critical patent/US20130327107A1/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
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
    • 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

Definitions

  • the invention relates to a hot-machining tool, particularly a piercing mandrel or a rolling bar for making seamless pipes, or a forging mandrel for hot forging tubular workpieces of metal, which machine tool has a base body, the machine-tool base body having a coating at least in a machining region. Furthermore, the invention relates to a method of making such a hot-machining tool.
  • a mandrel of this type for piercing round rods is known from DE 10 2008 056 988.
  • the machining region of the piercing mandrel is provided with a coating that reduces heat dissipation into the mandrel body during piercing and that firmly adheres to the mandrel body.
  • this layer be solidly anchored.
  • thermochemical coating method in order to improve the adhesion of the coating to be subsequently applied.
  • the object of invention is therefore to create a hot-machining tool of the above-described type, as well as a method of making it that ensures an improved bond between the base body of the machine tool and the coating. Accordingly, the hot-machining tool should have a longer service life, and making seamless pipes in particular is supposed to be more economically efficient.
  • the machine-tool base body has a surface profiling, and that the coating is applied to the surface profiling.
  • the surface profiling preferably forms at least one inset anchor formation extending axially of the machine tool, the surface profiling particularly being formed by a plurality of ridges and grooves on the surface of the machine-tool base body.
  • the machine-tool base body preferably consists of steel.
  • the coating can be a layer that protects against thermal and mechanical stresses. It can be applied by a thermochemical coating method.
  • the method of making such a hot-machining tool has the following steps, according to the invention:
  • a plurality of ridges and grooves are preferably formed on the surface of the machine-tool base body that was previously machined smooth.
  • the ridges are particularly configured as projections that are ridges, preferably rectangular in radial cross-section, extending over a predetermined length along a longitudinal axis of the machine tool, and are raised above the grooves by a predetermined height.
  • the grooves are preferably filled up with the coating, at least to the height of the ridges, during application of the coating according to step b), wherein preferably, the depth of the coating actually exceeds the height of the ridges.
  • thermochemical conversion that in particular comprises making an iron oxide, particularly preferably of scale.
  • step b) Application of the coating according to step b) can also take place, for example, by flame spraying or plasma spraying.
  • an improvement in the bond between machine-tool base body and coating is achieved in that the surface of the metallic support material is machined smooth and then configured with a defined structure consisting of ridges and gaps spaced apart by the ridges and preferably produced by mechanical machining, particularly by lathing.
  • a part of the support material can be converted to a protective layer, by a targeted thermochemical coating method of the surface of this support material.
  • Adhesion of the layer structure that has been formed is clearly improved by the structuring of the transition between the support material (base body) and the applied layer, which has previously been optimized, adapted in advance, in accordance with the conditions of use of the machine tool, and complete peeling off of the layer is prevented.
  • the gripping behavior between the rolled material and the machine tool is also improved.
  • the proposed method of procedure or the configuration as described is suitable, in general, for machine tools and components that are supposed to be protected by means of a coating, in order to be better able to withstand thermal and mechanical stress.
  • FIG. 1 is a side view of a hot-machining tool in the form of a piercing mandrel
  • FIG. 2 is a view of the detail shown at “Z” in FIG. 1 of the machine-tool base body before being coated;
  • FIG. 3 shows the detail Z according to FIG. 1 of the machine-tool base body after being coated
  • FIG. 4 shows the detail Z according to FIG. 1 of an alternative embodiment of the coated machine-tool base body
  • FIG. 5 is a first microsection of the detail Z of the hot-machining tool according to FIG. 1 ;
  • FIG. 6 is a second microsection of the detail Z of the hot work according to FIGS. 1 .
  • FIG. 1 a hot-machining tool 1 in the form of a piercing mandrel for making seamless pipe is shown.
  • the machine tool 1 has a base body 2 that has a machining region 3 that extends through a predetermined length along an axis a. In the machining region 3 , the machine tool 1 is provided with a coating 4 that protects the machine tool 1 from thermal and mechanical stress.
  • FIGS. 2 and 3 The precise structure of the machine tool, as a detail in the region Z according to FIG. 1 , i.e. as a detail of the machine-tool base body 2 , is shown in FIGS. 2 and 3 .
  • the radially outer surface of the machine-tool base body 2 has a surface profiling 5 consisting of a plurality of radially projecting ridges 6 that are disposed between grooves 7 that they form.
  • the ridges 6 have an axial dimension B parallel to the axis a, which preferably lies in the range of approximately 250 ⁇ m to 4000 ⁇ m.
  • a radial height D of the ridges 6 as compared with the grooves 7 lies in a range of approximately 500 ⁇ m to 5000 ⁇ m.
  • a spacing A between two ridges 6 preferably lies in a range of approximately 200 ⁇ m to 2000 ⁇ m.
  • the profiling 5 is applied to the surface of the base body 2 after it is machined smooth, and subsequently the recesses 7 , which are block-shaped or rectangular in radial section, are machined in, particularly lathed in.
  • the surface of the machine-tool base body 2 is provided with a coating 4 , as shown in FIG. 3 .
  • the total layer thickness C of the coating 4 fills the grooves 7 and exceeds the radial height of the ridges 6 .
  • the material of the coating 4 is inset as a result of the surface profiling 5 , so that the coating 4 adheres very firmly to the base body 2 during use of the machine tool 1 .
  • FIG. 4 a preferred embodiment or solution can be seen.
  • the prior machining of the machine-tool base body 2 is done as in the solution according to FIG. 2 and FIG. 3 , i.e. first the surface profiling 5 was machine into the smoothly machined base body 2 .
  • the progression of the profiling corresponds to that according to FIG. 2 .
  • part of the material of the base body 2 is converted to a protective layer, before application of the coating 4 , at first by a thermochemical treatment.
  • the converted material 8 runs in a layer of uniform thickness over the profiling 5 and is indicated with broken-line hatching.
  • the width of the ridges or elevated regions 6 decreases accordingly, as does the depth of the gaps, which again are rectangular in cross-section, as shown in FIG. 4 .
  • the coating 4 is applied to the material layer 8 converted in this manner, i.e. to the primary or inner protective layer produced by conversion of the support material, during conversion or subsequently, as a second, outer layer, as FIG. 4 shows for the finished machine tool. This again takes place by a thermochemical method or, for example, by flame spraying or plasma spraying.
  • a structure is therefore created between the support material (base body) 2 and the layer 4 , before or during application or production of the layer 4 on the support material 2 , which structure manifests itself in the converted material 8 .
  • Examples of actual coatings can be derived from the representations in FIGS. 5 and 6 .
  • the inner, more porous layer 8 produced by conversion on the elevated regions or ridges 6 and the filling of the gaps or grooves 7 and the second outer layer 4 applied to the converted layer.
  • the inner layer of converted material consists, in the present example, of iron oxides, and grows from the surface of the base body or the profiling. The gaps between the elevated regions or ridges are filled by the outer coating 4 .
  • the support material (tool base body) was coated with iron oxides, or the material of the base body was converted to iron oxides.
  • the support material in the present case is steel.
  • the maximum thickness of the coating on the base body amounts to approximately 1000 ⁇ m in this example.
  • the structured transition between the support material and the coating can be structured in optimized manner, depending on use, so that complete peeling of the layer during use can be prevented. As a result, the lifetime of the machine tool 1 , in particular, can be significantly increased.
  • the surfaces of the coated tools can be smoothed before or during use, by means of mechanical machining such as grinding and polishing (before use) or rolling (during use).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US13/576,875 2010-03-02 2011-02-11 Hot work tool and method for producing same Abandoned US20130327107A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102010009954 2010-03-02
DE102010009954.6 2010-03-02
DE102011010646.4 2011-02-09
DE102011010646A DE102011010646A1 (de) 2010-03-02 2011-02-09 Warmwerkzeug und Verfahren zu seiner Herstellung
PCT/EP2011/000643 WO2011107214A1 (fr) 2010-03-02 2011-02-11 Outil d'usinage à chaud et procédé de fabrication

Publications (1)

Publication Number Publication Date
US20130327107A1 true US20130327107A1 (en) 2013-12-12

Family

ID=44237620

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/576,875 Abandoned US20130327107A1 (en) 2010-03-02 2011-02-11 Hot work tool and method for producing same

Country Status (17)

Country Link
US (1) US20130327107A1 (fr)
EP (1) EP2542361B1 (fr)
JP (1) JP5591352B2 (fr)
KR (1) KR101469516B1 (fr)
CN (1) CN102781600B (fr)
AR (1) AR080439A1 (fr)
AU (1) AU2011223236A1 (fr)
BR (1) BR112012021887B1 (fr)
CA (1) CA2793074C (fr)
DE (1) DE102011010646A1 (fr)
ES (1) ES2481404T3 (fr)
MX (1) MX2012009993A (fr)
PL (1) PL2542361T3 (fr)
RU (1) RU2508173C1 (fr)
UA (1) UA104085C2 (fr)
WO (1) WO2011107214A1 (fr)
ZA (1) ZA201205816B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170333964A1 (en) * 2014-11-07 2017-11-23 Hua Guo Hot forming tool

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011109071A1 (de) * 2011-07-30 2013-01-31 Sms Meer Gmbh Rohrschmiedeverfahren mit urgeformten Hohlblock
DE102014000461B4 (de) * 2014-01-14 2017-01-05 Hua Guo Innenwerkzeug für die Herstellung nahtloser Stahlrohre
BR112017015320B1 (pt) * 2015-02-09 2022-12-06 Nippon Steel Corporation Método de produção de plugue
DE102015122975B3 (de) * 2015-12-30 2017-03-23 Wolfgang Dörr Verfahren zur Herstellung eines Warmumformwerkzeuges
RU2717422C1 (ru) * 2019-04-08 2020-03-23 Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") Охлаждаемая оправка прошивного стана

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963320A (en) * 1932-02-23 1934-06-19 Nat Tube Co Piercing point
JPS5819363B2 (ja) * 1977-07-09 1983-04-18 新日本製鐵株式会社 継目無鋼管穿孔機又は圧延機用の芯金
CH668377A5 (de) * 1985-12-06 1988-12-30 Walter Brauchli Zwingenartiges spannwerkzeug.
JP2521940B2 (ja) * 1987-02-05 1996-08-07 日本鋼管株式会社 継目無鋼管製造用プラグ
SU1675004A1 (ru) * 1988-11-14 1991-09-07 Всесоюзный научно-исследовательский и конструкторско-технологический институт трубной промышленности Оправка дл винтовой прокатки
JPH02224806A (ja) * 1989-02-28 1990-09-06 Nkk Corp 継目無し鋼管製造用プラグ
DE10316910B3 (de) * 2003-04-12 2004-09-02 Sms Meer Gmbh Verfahren zur Herstellung von Rohren aus metallischem Werkstoff
DE102005044777A1 (de) * 2005-09-20 2007-03-29 Sms Meer Gmbh Verfahren und Walzwerk zur Herstellung eines nahtlosen Rohres
DE102008056988A1 (de) 2007-12-07 2009-06-10 Sms Meer Gmbh Verfahren und Walzwerk zum Herstellen von nahtlosen Stahlrohren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170333964A1 (en) * 2014-11-07 2017-11-23 Hua Guo Hot forming tool

Also Published As

Publication number Publication date
RU2508173C1 (ru) 2014-02-27
CA2793074A1 (fr) 2011-09-09
MX2012009993A (es) 2012-11-23
ES2481404T3 (es) 2014-07-30
PL2542361T3 (pl) 2014-12-31
JP5591352B2 (ja) 2014-09-17
BR112012021887B1 (pt) 2021-06-22
BR112012021887A2 (pt) 2020-09-01
CN102781600A (zh) 2012-11-14
EP2542361A1 (fr) 2013-01-09
DE102011010646A1 (de) 2011-09-08
AU2011223236A1 (en) 2012-10-25
CA2793074C (fr) 2015-06-02
JP2013521128A (ja) 2013-06-10
KR20120112840A (ko) 2012-10-11
KR101469516B1 (ko) 2014-12-09
WO2011107214A1 (fr) 2011-09-09
EP2542361B1 (fr) 2014-06-18
ZA201205816B (en) 2013-03-27
AR080439A1 (es) 2012-04-11
UA104085C2 (ru) 2013-12-25
CN102781600B (zh) 2016-04-06

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