Coilbox and method for the operation thereof

Patent metadata

Field	Value
Publication number	US-2024058854-A1
Application number	US-202218557938-A
Country	US
Kind code	A1
Filing date	Mar 24, 2022
Priority date	Apr 30, 2021
Publication date	Feb 22, 2024
Grant date	—

Abstract

A coilbox is provided for winding a metal strip to form a coil and for unwinding the metal strip from the coil. In order to further develop a known coilbox in such a manner that the position of the coil is known at all times, in particular during its passive transfer from the winding station to the unwinding station, at least one additional roller rotatably mounted on the frame is provided.

First claim

1 .- 15 . (canceled)

16 . A coilbox ( 100 ), comprising:
a winding station ( 110 ) for winding a metal strip to form a coil ( 20 ),
wherein the winding station is formed by a plurality of rollers, including
a first roller ( 111 ) and
a second roller ( 112 )
rotatably mounted on a common frame ( 114 );
a rotary drive ( 120 ) for pivoting the frame ( 114 ) with the first roller ( 111 ) and the second roller ( 112 ) through an angle of rotation (a) about a point of rotation (D) in a region of the first roller ( 111 ) between
a winding position, in which the metal strip is wound to form the coil ( 20 ),
through a plurality of transition positions (P 1 , P 2 , P 3 ), into
a transfer position (P 4 ) for transferring the coil ( 20 ) to an unwinding station ( 120 );
the unwinding station ( 120 ) in which the metal strip can be unwound from the coil ( 20 ),
including at least
a third roller ( 123 ) and
a fourth roller ( 124 );
wherein the unwinding station ( 120 ) is arranged downstream of the winding station ( 110 ) in a direction of material flow (R), and wherein the second roller ( 112 ) is arranged downstream of the first roller ( 111 ) and the fourth roller ( 124 ) is arranged downstream of the third roller ( 123 ) in the direction of material flow (R), and wherein axes of rotation of all rollers are aligned parallel to one another, further comprising at least one additional roller ( 116 ) rotatably mounted on the frame ( 114 ), wherein an axis of rotation of the additional roller is parallel to the axes of rotation of the first to fourth rollers, and wherein the axis of rotation of the additional roller ( 116 ) is positioned on the frame ( 114 ) in such a manner that
a radial distance (xz) from the point of rotation (D) of the frame ( 114 ) to the axis of rotation of the additional roller ( 116 )
is greater than a radial distance (x 2 ) from the point of rotation of the frame to the point of rotation of the second roller; and

the radial distance (xz) from the point of rotation (D) of the frame ( 114 ) to the axis of rotation of the additional roller ( 116 )
plus a radius of the additional roller ( 116 )
is smaller than a minimum radial distance (x 3 ) from the point of rotation of the third roller ( 123 ) to the point of rotation (D) of the frame ( 114 ), minus at least the radius of the third roller, and

an uppermost point of the additional roller in a first transition position (P 1 ), in which uppermost points of the first roller and the second roller form a horizontal roller table plane (E 1 ), is arranged at a predetermined distance (w) below the roller table plane (E 1 ).

17 . The coilbox ( 100 ) according to claim 16 ,
wherein in the transfer position (P 4 ) the second roller ( 112 ) has reached its upper end position (TOP 2 ).

18 . The coilbox ( 100 ) according to claim 16 ,
wherein a diameter of the additional roller ( 116 ) is smaller than a diameter of the first, second, third or fourth roller.

19 . The coilbox ( 100 ) according to claim 16 ,
wherein at least one displacement device ( 130 ) is provided for individually displacing the third and/or the fourth roller ( 123 , 124 ) below the roller table plane (E 1 ) formed by the first and second rollers ( 111 , 112 ).

20 . The coilbox ( 100 ) according to claim 16 , further comprising
a further additional roller ( 115 ) rotatably mounted on the frame between the second roller ( 112 ) and the additional roller ( 116 ), wherein the further additional roller is positioned on the frame ( 114 ) in such a manner that it projects with an outer circumference over a notional tangential connecting line (V), facing the roller table plane (E 1 ), between the outer circumferences of the second roller ( 112 ) and the additional roller ( 116 ).

21 . The coilbox ( 100 ) according to claim 16 , further comprising
a position detector ( 140 ) for generating a position signal, which represents the position of the additional roller ( 116 ) when the additional roller is raised to or beyond a level of the roller table plane (E 1 ) formed by the first roller ( 111 ) and the second roller ( 112 ) in the first transition position (P 1 ).

22 . The coilbox ( 100 ) according to claim 16 , further comprising
a forming region arranged at a beginning of the winding station ( 110 ), the forming region having infeed rollers for guiding new metal strip entering the coilbox and having bending rollers and a forming roller for forming a beginning of the new metal strip to form a coil eye for a coil to be rewound in the winding station.

23 . The coilbox ( 100 ) according to claim 22 ,
wherein, when winding the metal strip into a new coil in the winding station, the frame ( 114 ) is pivoted by the rotary drive ( 120 ) into a winding position, in which the first and second rollers form an inclined plane towards the forming region.

24 . A system, comprising:
the coilbox ( 100 ) according to claim 16 ; and a coil ( 20 ), wherein the additional roller ( 116 ) is further rotatably mounted on the frame ( 114 ) in such a manner that, if the frame is pivoted from the first transition position (P 1 ) by an angle of rotation (αP 2 ) into a second transition position (P 2 ), in which the additional roller ( 116 ) initially contacts the coil ( 20 ) carried by the second and third roller ( 112 , 123 ), a distance (xzP) between the axis of rotation of the additional roller ( 116 ) and the point of rotation of the frame ( 114 ) projected into the horizontal is smaller than the distance (xcP) between the center of gravity of the coil and the point of rotation (D) of the frame ( 114 ).

25 . The system according to claim 24 ,
wherein, if the frame is pivoted beyond a third transition position (P 3 ) of the plurality of transition positions into the transfer position (P 4 ) and the coil ( 20 ) is supported only by the third roller ( 123 ) and the additional roller ( 116 ), the coil ( 20 ) is lowered with the lowermost point on its outer circumference no more than a predetermined permissible maximum distance (Amax) below an upper edge of the third roller ( 123 ).

26 . A method for operating the coilbox ( 100 ) according to claim 16 , comprising:
winding the metal strip to form a wound coil ( 20 ) in the winding station of the coilbox; transferring the wound coil ( 20 ) via the plurality of transition positions (P 1 , P 2 , P 3 ) within the winding station ( 110 ) into the unwinding station ( 120 ) of the coilbox ( 20 ) arranged downstream in the direction of material flow (R) by applying a pulling force to a start of the metal strip that has been wound to form the coil and by lifting at least the second roller ( 112 ) of the winding station into a transfer position (P 4 ) by pivoting about the point of rotation (D) of the frame; pivoting, in order to reach the transfer position (P 4 ), the frame with the first and second roller rotatably mounted thereon along with the additional roller ( 116 ) about the point of rotation of the frame (D) to such an extent that the additional roller ( 116 ) is raised above the horizontal roller table plane (E 1 ) formed by the first roller ( 111 ) and the second roller ( 112 ) in the first transition position (P 1 ); and supporting the coil ( 20 ) in a quasi-labile equilibrium in the transfer position (P 4 ) only by the third roller ( 123 ) and the additional roller ( 116 ).

27 . The method according to claim 26 , further comprising:
generating a position signal if the additional roller ( 116 ) is raised above the horizontal roller table plane (E 1 ) formed by the first roller ( 111 ) and the second roller ( 113 ) in their starting position and has

Assignees

• Sms Group Gmbh

Inventors

• Theobald Frank
• Ehls Bernhard

Classifications

• B65H2402/31

  Pivoting support means · CPC title

• B65H19/2246

  and the roll being supported on two rollers · CPC title

• B65H2701/173

  Metal · CPC title

• B65H19/2276

  The web roll being driven by a winding mechanism of the coreless type · CPC title

• B65H18/025

  Parallel rollers type · CPC title