WO2017144407A1 - Cylindre, en particulier cylindre de travail de dressage et produit plat dressé - Google Patents

Cylindre, en particulier cylindre de travail de dressage et produit plat dressé Download PDF

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Publication number
WO2017144407A1
WO2017144407A1 PCT/EP2017/053779 EP2017053779W WO2017144407A1 WO 2017144407 A1 WO2017144407 A1 WO 2017144407A1 EP 2017053779 W EP2017053779 W EP 2017053779W WO 2017144407 A1 WO2017144407 A1 WO 2017144407A1
Authority
WO
WIPO (PCT)
Prior art keywords
flat product
roller
μηη
range
structural elements
Prior art date
Application number
PCT/EP2017/053779
Other languages
German (de)
English (en)
Inventor
Martin Bretschneider
Frank Klose
Tobias KLINKBERG
Thomas Routschek
Moritz Radszat
Björn HILDEBRANDT
Original Assignee
Salzgitter Flachstahl 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
Application filed by Salzgitter Flachstahl Gmbh filed Critical Salzgitter Flachstahl Gmbh
Publication of WO2017144407A1 publication Critical patent/WO2017144407A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling

Definitions

  • roller in particular tempering roller, and trained flat product
  • the invention relates to a roller, in particular temper rolling roller, with a stochastic surface structure with structural elements, in particular for
  • the invention relates to a flat product of a metal material, in particular trained with an aforementioned roller, with a stochastic surface structure with recesses. It is well known that sheet metal processors such as
  • kaltnachgewalzt This cold rolling is also referred to as skin-pass.
  • skin-pass By cold rolling, both the mechanical characteristics such as yield strength and the surface topography, for example, characterized by roughness, peak number and waviness of the steel sheet on a desired state set.
  • Tempering rollers used, which have a textured surface.
  • ablative texturing processes for temper rolling rollers are known: SBT (Shot Blast) - spinning of angular blasting material on the surface of the temper rolling, EDT (Electro Discharge Texturing) - EDM, EBT (Electro Beam Texturing) - electron beam in vacuum shoots defined craters into the surface of the temper rolling rolls, Lasertex laser beam shoots defined craters into the surface of the temper rolling rolls.
  • This sheet can be uncoated or surface-finished and is used by the automotive industry in body construction for interior and exterior skin parts with the highest demands on the forming behavior and paintability.
  • the surface topography of the sheet metal significantly influences the forming behavior as well as the adhesive adhesion and the optical properties of the automotive coating.
  • a defined, the customer requirements corresponding surface topography of the fine sheet is produced during cold rolling.
  • the temper rolling rollers used for this purpose are produced in a positive process by applying a texture to a smooth roller, in contrast to the above-described erosive texturing.
  • a so-called single stage TOPOCROM ® process with which the surface of a smooth roll is electrolytically structural and hard chrome plated suitable.
  • the skin pass mill is coated in a reactor equipped with an anode cage and filled with a chromium electrolyte. The chromium ions of the electrolyte are reduced during the coating and on the surface of the
  • Tempering roll metal deposited This coating process provides an absolutely uniform stochastic distribution of the differently sized hard chromium hemispheres deposited on the roll surface, which are in size and Number per unit area targeted and reproducible by the
  • Tailoring rolls are transferred to the thin sheet during the casting in the form of appropriate dome.
  • the surface topography of the thin sheet also has the task to absorb the lubricant and a hydrostatic or
  • hydrodynamic lubrication to help reduce friction.
  • Lubricant reservoir serve, improve the friction and lubrication conditions significantly.
  • the surface structuring of the rolling mill roll is carried out by a superposition of two methods.
  • a first method a finely divided stochastic basic structure by vortex beam or
  • Spark erosion is generated on the surface of the rolling mill roll.
  • This stochastic basic structure is intended to ensure a minimum wetting of the surface with lubricant via a fine-meshed network of microchannels. Also, this is supposed to be stochastic
  • a deterministic cover structure with crater-like depressions is produced by laser or electron beam treatment. These depressions should ensure lubrication in the sense of closed hydrostatic lubrication pockets under deformation stresses.
  • This stochastically deterministic roughness structure of the rolling mill roll is transferred to the thin sheet by rolling. Accordingly, in the surface of the thin sheet, the deterministic structures are interconnected via the stochastic structures. Thus, the stored lubricant in the lubrication pockets can be distributed through the microchannels and also drain.
  • European Patent Application EP 0 606 743 also discloses a roller for tempering steel sheets.
  • the surface structuring of the roll is carried out by first applying a thin chromium layer on the roll surface, then a thicker insulating resin layer is applied and this is removed locally by means of high-energy laser radiation and evenly distributed. Then, the processed roll is immersed in a chromic acid bath and subjected to another chromium treatment. This results in supernatants of chromium, which remain after removal of the resin layer on the chromium-coated surface of the roller and leave by means of rolling on the steel belt depressions. These recesses have a diameter d of 50 to 500 ⁇ , a depth H of 2 to 40 ⁇ and an average distance from each other from 1 d to 4d.
  • the patent US 5,532,051 describes a steel sheet with improved oil storage properties for press forming. This is the steel sheet with a
  • Tempering roller processed which is surface-structured by means of microlithography.
  • the uniformly distributed depressions introduced into the steel sheet are round, have a diameter of 20 to 600 ⁇ m, a depth of 1 to 20 ⁇ m and a distance from one another of 10 to 1000 ⁇ m. Characteristic of these wells is their flat bottom, through which forms a lubricant reservoir.
  • the depressions are evenly distributed over the steel sheet surface and extend to at least 30% of the steel sheet surface.
  • the invention is based on the object, a roller, in particular
  • Tempering roller with a stochastic surface structure
  • a roller in particular temper rolling, with the features of claim 1 and a flat product made of a metal material having the features of claim 9.
  • Advantageous embodiments of the invention are specified in the subclaims 2 to 8 and 10 to 18. According to the invention, a roller, in particular a skin pass mill, with a surface structure with stochastic distributed and stochastically large structural elements, in particular for the production of flat products of a metal material, in particular of a steel material, an improved
  • the structural elements have a height in the range of 20 to 300 ⁇
  • the structural elements have a width in the range of 60 to 600 ⁇
  • the structural elements have a number of 5 to 60 per mm 2 .
  • the distribution of the structural elements and the size of the structural elements are each stochastic, but with a defined range in terms of number and dimensions. Only this makes it possible to produce a flat product with improved oil retention capacity and oil distribution capacity with such a temper rolling mill. This targeted with the surface structure targeted better
  • a subsequent forming at the customer is facilitated because no re-oiling is required. Overall, this leads to less rejects during forming and more complex forming operations are possible.
  • the processor has a homogeneous, sufficiently thick oil film on the sheet (viewed macroscopically) and thus constant good tribological conditions during the forming process.
  • the invention improves oil retention and optionally compensates Insufficiencies with worse band profile or worse crowning.
  • the structural elements on the roller have a height in the range of 25 to 100 ⁇ m. It is particularly preferred that the structural elements have a width in the range from 90 to 170 ⁇ m, that the structural elements have a number from 20 to 40 per mm 2 , and / or whose surface structure has a roughness Ra from 4 to 14 ⁇ m, preferably from 6 to 8 ⁇ , has. It is advantageously provided that the surface structure of the roller has a peak number RPc of 5 to 50 l / cm, preferably 20 to 30 l / cm.
  • the surface structure of the roller according to the invention is preferably achieved by an electrolytic structure and hard chrome plating.
  • the desired surface structure is applied to a roller in the sense of a positive process, so that after reaching the period of use of the surface structure of the roller only by grinding the surface structure is removed and thus the
  • Jacket surface of the roller is largely retained, then on the electrolytic structure and hard chrome plating the surface structure new
  • the structural elements are dome-shaped.
  • Wells an improvement in the oil holding capacity and the distribution of oil on the trained flat product achieved in that the wells have a depth in the range of 15 to 90 ⁇ , the wells have a width in the range of 50 to 400 ⁇ , the wells a number from 4 to 60 per mm 2 and the sum of the area of the recesses (4) projects onto the flat product Surface area of 0.41 or greater.
  • Such a surface structure which is distinguished qualitatively by many large and mutually isolated depressions, significantly influences the oil retention capacity of the flat product. A production of forming critical parts is thus facilitated, since there a uniform presence of the applied lubricant is important.
  • the flat products produced in connection with the invention are preferably used in motor vehicles, domestic appliances - so-called white goods - and sheet steel furniture.
  • the flat products may be electrolytically coated or hot-dip coated.
  • the flat products can be formed into components by, for example, deep drawing and stretch drawing.
  • the flat products are intended for later painting and are used as painted visible parts.
  • the flat products are particularly suitable for forming processes, in particular deep drawing.
  • the small structural elements have a significant positive influence on peak numbers, waviness, glossiness and general
  • the depressions have a height in the range of 20 to 30 ⁇ . It is particularly preferred that the depressions have a width in the range of 60 to 120 ⁇ m and / or that the depressions have a number of 20 to 30 per mm 2 .
  • the surface structure of the flat product has a roughness Ra of 0.8 to 4 ⁇ m, preferably of 1 to 3 ⁇ m, and / or has one Peak number RPc of 5 to 50 l / cm, preferably 20 to 30 l / cm.
  • the depressions are dome-shaped.
  • the flat product has a thickness in the range of 0.35-6.0 mm.
  • the flat product is a steel sheet.
  • the flat product may be provided with coatings of zinc or tin or a zinc-aluminum alloy or a zinc-iron alloy or a zinc-aluminum-silicon alloy or an aluminum-silicon alloy or zinc-aluminum-magnesium alloy ,
  • the coatings can also be organic.
  • the coating may also consist of a combination of the above-mentioned coatings.
  • flat products as sheets or
  • Metal alloys especially steel, aluminum, magnesium, copper, zinc or tinplate can be produced.
  • FIG. 1 shows a schematic plan view of a surface structure of a
  • FIG. 2 shows two schematic lateral sectional views of FIG. 1.
  • FIG. 1 is a schematic plan view of a section of a
  • Recesses 4 in the flat product 2 is stochastic.
  • the structural elements 3 or depressions 4 are predominantly separated from one another, may have smaller or larger dimensions or may become groups of a few Structure elements 3 and depressions 4 overlap.
  • the structural elements 3 or depressions 4 and also their small groups are separated from each other and offer a closed and compared to the prior art larger Ol Artvolumen.
  • the structural elements 3 or depressions 4 are distributed in such a way that the edges of the structural elements do not intersect for the most part in order to obtain separate oil reservoirs.
  • FIG. 2 shows two schematic lateral sectional views of FIG. 1.
  • the upper part of FIG. 2 relates to a near-surface section of a roller 1 and the lower part to a near-surface section of a flat product 2. It can be seen that the surface structure of the roller 1 has a multiplicity of
  • Structural elements 3 are applied to the surface of a flat, cylindrical roller with a hard chromium plating and are then referred to as
  • Hard chromium hemispheres formed with steep flanks In particular, this is the TOPOCROM ® method described above, which is one-stage and applies the structural elements on a roller and not achieved by removal. In connection with the present invention are under domes
  • Hemisphere segments understood in which preferably the height is less than the width.
  • the height is measured starting from the surface of the roller 1 radially in the direction of a rotation axis of the roller 1 and the width at a right angle to the direction of the height.
  • the calottes are thus rather flat.
  • the domes on the surface of the roll 1 have an ideal shape because the dome merges directly with the remainder of the surface of the roll 1, which extends substantially parallel to the axis of rotation of the roll 1. At the edge of the dome thus no annular depressions are present, which would then lead during rolling or conditioning of the flat product to an annular bead or throw. Such a bead can hinder penetration of the oil drop into the recesses 4.
  • the raised structural elements 3 on the roll 1 are introduced in the course of the temper rolling in the surface of the flat product 2 in the form of recesses 4.
  • the wells 4 are therefore formed negative-calotte-shaped, so that the above explanations to the dome also apply to the wells 4.
  • Structural elements per mm 2 depth of the recesses in ⁇ , width of the recesses in ⁇ , number of recesses per mm 2 , roughness Ra in ⁇ and peak number RPc in cm-1 and in the value ranges given in Tables 1 and 2 give good results.
  • the dome width is measured at the base of the dome and thus at its widest point.
  • the width is a lateral extension from edge to edge of
  • Structural elements 3 and wells 4 viewed. In qualitative terms, this results in large depressions 4 in the flat product being more oil, especially corrosion protection oil or lubricating oil, record and hold. However, the volume and the depth of the recesses 4 must not be too large, since it can then happen that this oil is not available for the forming process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un cylindre, en particulier un cylindre de dressage et une structure superficielle dotée d'éléments structuraux (3) répartis de façon aléatoire et d'importance aléatoire, en particulier pour produire des produits plats en matériau métallique, en particulier un matériau en acier, ledit cylindre permettant de dresser des produits plats avec un meilleur pouvoir de rétention de l'huile et une meilleure répartition de l'huile, étant donné que les éléments structuraux (3) présentent une hauteur de l'ordre de 20 à 300 µm et une largeur de l'ordre de 60 à 600 µm et le nombre desdits éléments structuraux (3) est compris entre 5 à 60 par mm². L'invention concerne également un produit plat en matériau métallique, en particulier dressé avec un cylindre (1) du type précité, lequel présente une structure superficielle comportant des cavités (4) réparties de manière aléatoire et d'importance aléatoire, un meilleur pouvoir de rétention de l'huile et une meilleure répartition de l'huile étant obtenus du fait que les cavités (4) présentent une profondeur de l'ordre de 15 à 90 µm, lesdites cavités (4) présentent une largeur de l'ordre de 50 à 400 µm, le nombre desdites cavités est compris entre 4 et 60 par mm² et la somme de la surface des cavités projetée sur le produit plat représente une partie plane de 0,41 ou davantage.
PCT/EP2017/053779 2016-02-23 2017-02-20 Cylindre, en particulier cylindre de travail de dressage et produit plat dressé WO2017144407A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016103159.3 2016-02-23
DE102016103159 2016-02-23

Publications (1)

Publication Number Publication Date
WO2017144407A1 true WO2017144407A1 (fr) 2017-08-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021151652A1 (fr) * 2020-01-31 2021-08-05 Thyssenkrupp Rasselstein Gmbh Produit d'emballage en tôle à surface structurée et procédé de fabrication d'un produit d'emballage en tôle de ce type
DE102020124488A1 (de) 2020-09-21 2022-03-24 Thyssenkrupp Steel Europe Ag Blechbauteil und Verfahren zu seiner Herstellung
WO2023232547A1 (fr) * 2022-06-01 2023-12-07 Thyssenkrupp Steel Europe Ag Produit métallique plat et pièce réalisée à partir de celui-ci

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0215808A (ja) * 1988-06-30 1990-01-19 Kawasaki Steel Corp 調質圧延用ロール
EP0606743A2 (fr) 1992-12-16 1994-07-20 Quantel Limited Appareil de stockage de données
US5532051A (en) 1991-12-25 1996-07-02 Nippon Steel Corporation Steel sheet excellent in coating sharpness, defect-formation resistance and workability
DE19529429C2 (de) 1995-08-10 1999-10-21 Thyssen Stahl Ag Feinblech, Walzwerkswalze für die Feinblechherstellung, Verfahren zur Oberflächenstrukturierung der Walzwerkswalze und ihre Verwendung
WO2001071048A1 (fr) 2000-03-21 2001-09-27 Sm Schweizerische Munitionsunternehmung Ag Fabrication d'un outil d'estampage et utilisation dudit outil
WO2003004186A1 (fr) * 2001-07-04 2003-01-16 Blanco Gmbh + Co Kg Procede de production d'une tole metallique, tole metallique et dispositif permettant d'appliquer une structure superficielle sur cette tole metallique
EP2554292A1 (fr) * 2011-08-05 2013-02-06 Witzenmann GmbH Élément conducteur avec structure de surface ainsi que procédé de fabrication et d'utilisation d'un tel élément conducteur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0215808A (ja) * 1988-06-30 1990-01-19 Kawasaki Steel Corp 調質圧延用ロール
US5532051A (en) 1991-12-25 1996-07-02 Nippon Steel Corporation Steel sheet excellent in coating sharpness, defect-formation resistance and workability
EP0606743A2 (fr) 1992-12-16 1994-07-20 Quantel Limited Appareil de stockage de données
DE19529429C2 (de) 1995-08-10 1999-10-21 Thyssen Stahl Ag Feinblech, Walzwerkswalze für die Feinblechherstellung, Verfahren zur Oberflächenstrukturierung der Walzwerkswalze und ihre Verwendung
WO2001071048A1 (fr) 2000-03-21 2001-09-27 Sm Schweizerische Munitionsunternehmung Ag Fabrication d'un outil d'estampage et utilisation dudit outil
WO2003004186A1 (fr) * 2001-07-04 2003-01-16 Blanco Gmbh + Co Kg Procede de production d'une tole metallique, tole metallique et dispositif permettant d'appliquer une structure superficielle sur cette tole metallique
EP2554292A1 (fr) * 2011-08-05 2013-02-06 Witzenmann GmbH Élément conducteur avec structure de surface ainsi que procédé de fabrication et d'utilisation d'un tel élément conducteur

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021151652A1 (fr) * 2020-01-31 2021-08-05 Thyssenkrupp Rasselstein Gmbh Produit d'emballage en tôle à surface structurée et procédé de fabrication d'un produit d'emballage en tôle de ce type
CN114929921A (zh) * 2020-01-31 2022-08-19 蒂森克虏拉塞斯坦有限公司 具有结构化表面的包装板材产品和用于制造这种包装板材产品的方法
DE102020124488A1 (de) 2020-09-21 2022-03-24 Thyssenkrupp Steel Europe Ag Blechbauteil und Verfahren zu seiner Herstellung
US12104218B2 (en) 2020-09-21 2024-10-01 Thyssenkrupp Steel Europe Ag Sheet metal component and method for producing same
WO2023232547A1 (fr) * 2022-06-01 2023-12-07 Thyssenkrupp Steel Europe Ag Produit métallique plat et pièce réalisée à partir de celui-ci

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