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US 10,286,434 B2Granted
Rolling mill, and device and method for determining the rolling or guiding gap of the roll stands or guide stands in a multi-stand rolling mill
AssigneeSMS group GmbH
InventorMark Haverkamp
Life of this patent
Estimating the term…
Abstract
A method for determining the rolling or guiding gap of the roll stands or guide stands in a multi-stand rolling mill positions a comparison scale at at least one stand, preferably at the first and the last stand, and subsequently the rolling or guiding gap of the respective stand is determined. In this method, a camera is arranged at one of the input or output sides and a transmitter for a reference device, a reference transducer and/or a reference scale is arranged at the other of the input or output sides before the comparison scale is positioned, such that adjustment operations at the camera can subsequently be avoided.
Claims24
Rolling mill comprising:
- an arrangement of stands comprising at least a first stand and a last stand, the first stand and the last stand selected from a group consisting of roll stands comprising rolls and guide stands comprising guides, said arrangement being arranged along a center line of the rolling mill disposed in a rolling direction,
- a camera configured to determine rolling gaps of the rolls or guiding gaps of the guides, and
- a background light that uses a light plate having filter films or LEDs which are collimated and an exit angle from the light plate is reduced which minimizes scattered light from the light plate, and a comparison scale displaced on a support tube positioned between the camera and the light plate of the background light,
- wherein the rolling mill has an input side and an output side,
- wherein the camera is fixedly disposed and optically aligned along the center line of the rolling mill at one of the input side and the output side when determining the rolling gaps of the rolls or guiding gaps of the guides,
- wherein the background light is disposed at the other of the input side and the output side, and
- wherein the background light is provided on the input side or the output side opposite that of the camera;
- wherein the camera has an optical device having a depth of field that reaches over an entirety of the arrangement of stands;
- and
- wherein an image processing apparatus that follows the camera is configured to determine a contour of roll surfaces of the rolls or guide surfaces of the guides, and
- wherein the disposition of the camera having said optical device relative to the rolling mill is such that imaging inaccuracies that are caused by a shift in focus and a related movement of the camera optics is avoided.
8 more elements
Rolling mill comprising:
- an arrangement of stands comprising at least a first stand and a last stand, the first stand and the last stand selected from a group consisting of roll stands comprising rolls and guide stands comprising guides, said arrangement being arranged along a center line of the rolling mill disposed in a rolling direction,
- a camera configured to determine the rolling gaps of the rolls or guiding gaps of the guides, and
- a background light that uses a light plate having filter films or LEDs which are collimated and an exit angle from the light plate is reduced which minimizes scattered light from the light plate,
- wherein the rolling mill has an input side and an output side,
- wherein the camera is fixedly disposed and optically aligned along the center line of the rolling mill at one of the input side and the output side when determining the rolling gaps of the rolls or guiding gaps of the guides,
- wherein the background light is disposed at the other of the input side and the output side, and wherein the background light is provided on the input side or the output side opposite that of the camera;
- wherein the camera has an optical device having a depth of field that reaches over an entirety of the arrangement of stands;
- and
- wherein an image processing apparatus that follows the camera is configured to determine a contour of roll surfaces of the rolls or guide surfaces of the guides, and
- wherein the disposition of the camera having said optical device relative to the rolling mill is such that imaging inaccuracies that are caused by a shift in focus and a related movement of camera optics can be are avoided;
- a comparison scale with scale positions that is disposed in front of or in each roll stand, proceeding from the background light or a transmitter;
- and
- a support tube for support of the comparison scale is disposed at the other of the input side or the output side.
10 more elements
Rolling mill comprising:
- an arrangement of stands comprising at least a first stand and a last stand, the first stand and the last stand selected from a group consisting of roll stands comprising rolls and guide stands comprising guides, said arrangement being arranged along a center line of the rolling mill disposed in a rolling direction,
- a camera configured to determine the rolling gaps of the rolls or guiding gaps of the guides, and
- a background light being always outside of the roll stands;
- wherein the rolling mill has an input side and an output side,
- wherein the camera is fixedly disposed at one of the input side and the output side, when determining the rolling gaps of the rolls or guiding gaps of the guides,
- wherein the background light is disposed at the other of the input side and the output side, and
- wherein the background light is provided on the input side or the output side opposite that of the camera;
- wherein the camera has an optical device having a depth of field that reaches over an entirety of the arrangement of stands;
- and
- wherein an image processing apparatus that follows the camera is configured to determine a contour of roll surfaces of the rolls or guide surfaces of the guides, and
- wherein the disposition of the camera having said optical device relative to the rolling mill is such that imaging inaccuracies that are caused by a shift in focus and a related movement of the camera optics are avoided;
- wherein said background light radiates sufficiently uniform light to the camera so that contours of the rolls or the guides to be measured, stand out clearly in front of said background light,
- a comparison scale with scale positions that is disposed in front of or in each roll stand, proceeding from the background light or a transmitter.
10 more elements
Rolling mill comprising:
- an arrangement of stands comprising at least a first stand and a last stand, the first stand and the last stand selected from a group consisting of roll stands comprising rolls and guide stands comprising guides, said arrangement being arranged along a center line of the rolling mill disposed in a rolling direction,
- a camera configured to determine the rolling gaps of the rolls or guiding gaps of the guides, and
- a background light that uses a light plate having a distance of the light plate to the stands being sufficiently high, and the background light is always outside of the roll stands;
- wherein the rolling mill has an input side and an output side,
- wherein the camera is fixedly disposed at one of the input side and the output side, when determining the rolling gaps of the rolls or guiding gaps of the guides,
- wherein the background light is disposed at the other of the input side and the output side, and
- wherein the background light is provided on the input side or output side opposite that of the camera;
- wherein the camera has an optical device having a depth of field that reaches over an entirety of the arrangement of stands;
- and
- wherein an image processing apparatus that follows the camera is configured to determine a contour of roll surfaces of the rolls or guide surfaces of the guides, and
- wherein the disposition of the camera having said optical device relative to the rolling mill is such that imaging inaccuracies that are caused by a shift in focus and a related movement of camera optics are avoided;
- a comparison scale with scale positions that is disposed in front of or in each roll stand, proceeding from the background light or a transmitter;
- and
- a support tube for support of the comparison scale is disposed at the other of the input side or the output side.
11 more elements
Dependencies are inferred from the claim text.