EP0338816A2
Expired / Lapsed
EP
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Process and equipment for micropattern forming on roll surface, metal sheets for pressworking prepared by the roll and methods of preparing same
Assignee: JFE Steel Corp
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Filing: 1989-04-20
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Granted: —
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Expires: 2009-04-20
Abstract
Abstract A process and an equipment for micro-pattern forming on the surface of a rolling roll (1), and a metallic thin sheet and preparation thereof by transfering the micro-pattern on the surface by use of the roll are provided. Such a rolling roll can be attained by a method wherein resin film (28) mixed with optical absorbing agent is formed on the surface, a Q switch YAG laser having an output of 5 to 100 W is applied to make a marking of this resin film, a part of the coated film is removed in strictly accordance with the pattern, then an etching process is applied to the roll surface. The metallic thin sheet skin pass rolled by this roll is used as a car panel being superior in pressworkability and sharpness of reflections.
Inventors
- 👤 Takaaki Research Laboratories Iguchi
- 👤 Takanori Research Laboratories Tamari
- 👤 Takaaki Research Laboratories Hira
- 👤 Kunio Research Laboratories Isobe
- 👤 Ikuo Research Laboratories Yarita
- 👤 Hideo Research Laboratories Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/04; C; C23; C23F; C23F4/00; C23F4/04; B21; B21B; B21B1/00; B21B1/40; B21B27/00; B21B27/005; B23; B23K; B23K26/00; B23K26/08; B23K26/0823; B23K26/18; C23F1/00; C23F1/02; B23K2103/00; B23K2103/02; B23K2103/04; B31; B31F; B31F2201/00; B31F2201/07; B31F2201/0707; B31F2201/0715; B31F2201/0717; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1241; Y10T428/12993; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24736
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
99 words
1) A process of forming a micro-pattern on the surface of a rolling roll comprising the steps of: (1) Forming a film of acid corrosion-resistant resin on the rolling roll surface by applying a mixture of an acid corrosion-resistant resin solution and a light-absorbing agent; (2) Marking off a desired pattern on this film of resin, using a Q-switched and a YAG laser having an output of 5 to 100 W on an averange, and exposing the roll surface with the pattern thus marked off; and (3) Thereafter, performing etching to form the desired pattern on the roll surface.
Claim 2
Dependent Claim
99 words
1) A process of forming a micro-pattern on the surface of a rolling roll comprising the steps of: (1) Forming a film of acid corrosion-resistant resin on the rolling roll surface by applying a mixture of an acid corrosion-resistant resin solution and a light-absorbing agent; (2) Marking off a desired pattern on this film of resin, using a Q-switched and a YAG laser having an output of 5 to 100 W on an averange, and exposing the roll surface with the pattern thus marked off; and (3) Thereafter, performing etching to form the desired pattern on the roll surface.
Claim 3
Dependent Claim
34 words
2) A process of forming a micro-pattern on the surface of a rolling roll according to claim 1) in which a resin film thickness formed on the roll surface is 1 to 10 µm.
Claim 4
Dependent Claim
186 words
3) An equipment for forming a micro-pattern on the surface of a rolling roll comprising; (a) a roll rotating device for supporting the roll and rotating the same; (b) a coating device for coating resin-like substance to said roll surface; (c) a laser plotter comprised of a laser oscillator for generating a pulse-like laser in response to an electrical signal and a device for guiding said laser to the roll surface and focusing the laser; (d) an etching device for etching a roll surface processed by said laser plotter; (e) a moving device for moving independently or simultaneously each of said coating device, laser plotter and ethcing device in an axial direction of the roll; (f) an image processing device for making a pattern to be formed on a roll surface, dividing the pattern into some dots to make a binary encoding and to make a series of plot data; and (g) a control device for instructing a pulse ejecting timing of said laser plotter in response to a signal sent from a device for detecting a rotational angle of the roll and said plot data.
Claim 5
Dependent Claim
186 words
3) An equipment for forming a micro-pattern on the surface of a rolling roll comprising; (a) a roll rotating device for supporting the roll and rotating the same; (b) a coating device for coating resin-like substance to said roll surface; (c) a laser plotter comprised of a laser oscillator for generating a pulse-like laser in response to an electrical signal and a device for guiding said laser to the roll surface and focusing the laser; (d) an etching device for etching a roll surface processed by said laser plotter; (e) a moving device for moving independently or simultaneously each of said coating device, laser plotter and ethcing device in an axial direction of the roll; (f) an image processing device for making a pattern to be formed on a roll surface, dividing the pattern into some dots to make a binary encoding and to make a series of plot data; and (g) a control device for instructing a pulse ejecting timing of said laser plotter in response to a signal sent from a device for detecting a rotational angle of the roll and said plot data.
Claim 6
Dependent Claim
152 words
4) An equipment for forming a micro-pattern on the surface of a rolling roll according to claim 3) in which; the laser plotter is provided with an YAG laser oscillator, a first optical modulator arranged between two resonant mirrors in said laser oscillator, and a second optical modulator arranged in the midway of a laser beam path out of the laser oscillator; the roll rotating device is provided with a device for detecting a rotational angle of the roll composed of a rotary encoder; and the control device is provided with an optical modulator driver for driving said first optical modulator in response to a clock signal of said rotary encoder, and with an optical modulator driver for driving said second optical modulator in response to a singal taken out of a portion corresponding to a dot required for making said image from said clock signal in reference to the plot data.
Claim 7
Dependent Claim
67 words
5) An equipment for forming a micro-pattern on the surface of a rolling roll according to claim 3) or 4) in which the laser plotter is provided with a spectroscope for dividing a laser beam into a plurality of lines between the laser oscillator and the second optical modulator and further with a plurarity of second optical modulators in correspondence with the number of divided laser beams.
Claim 8
Dependent Claim
25 words
6) A metallic sheet for use in press forming having on the surface thereof a micro-pattern composed of independent pond-like indentations and continuous groove-like indentations.
Claim 9
Dependent Claim
25 words
6) A metallic sheet for use in press forming having on the surface thereof a micro-pattern composed of independent pond-like indentations and continuous groove-like indentations.
Claim 10
Dependent Claim
35 words
7) A metallic sheet for use in press forming according to claim 6) in whicn independent pond-like indentations are arranged in regulated locations and continuous net-like groove-like indentations are enclosing a circumferences of said indentations.
Claim 11
Dependent Claim
38 words
8) A metallic sheet for use in press forming according to claim 6) in which independent pond-like indentations are arranged at a part of the sheet surface, and continuous net-like groove-like indentations are arranged at aother part thereof.
Claim 12
Dependent Claim
26 words
9) A roll for rolling metallic sheet for press forming comprising a surface pattern composed flat topped independent trapezoid projections and/or flat topped continuous net-like projections.
Claim 13
Dependent Claim
26 words
9) A roll for rolling metallic sheet for press forming comprising a surface pattern composed flat topped independent trapezoid projections and/or flat topped continuous net-like projections.
Claim 14
Dependent Claim
32 words
10) A method for preparing a mettalic sheet for press forming comprising skin pass rolling sequentially by using a roll having independent trapezoid projections and by using another roll having net-like projections.
Claim 15
Dependent Claim
32 words
10) A method for preparing a mettalic sheet for press forming comprising skin pass rolling sequentially by using a roll having independent trapezoid projections and by using another roll having net-like projections.
Claim 16
Dependent Claim
47 words
11) A method for preparing a metallic sheet for press forming according to claim 10) in which the roll with continuous net-like projections having a larger aperture than a sum of a width and a pitch of the trapzoid independent projections of the other roll is used.
Claim 17
Dependent Claim
47 words
12) A method for preparing a metallic sheet for press forming comprising: using a roll which provides a surface pattern composed of flat topped independent trapezoid projections and/or flat topped continuous net-like projections, and skin pass rolling the sheet with reduction rate of 0.3 to 2 %.
Claim 18
Dependent Claim
47 words
12) A method for preparing a metallic sheet for press forming comprising: using a roll which provides a surface pattern composed of flat topped independent trapezoid projections and/or flat topped continuous net-like projections, and skin pass rolling the sheet with reduction rate of 0.3 to 2 %.
References Cited (Backward Citations)
No citation records indexed.
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