JPS6117574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a tension leveler for correcting shape defects in a strip.

As the strip undergoes various processes such as rolling, annealing, and temper rolling in the manufacturing process of the strip (metal band plate), various shape defects such as warping, waving, edge elongation, and mid-elongation occur. These shape defects not only cause various problems in the subsequent processing steps of the strip, but also become a factor in lowering the quality level of products using the strip. Therefore, generally, the strip that has gone through the above-mentioned processes is subjected to a bending force and a tensile force by a level (straightening machine) in order to remove the shape defects, causing plastic elongation, and this plastic elongation is used to straighten the strip. It's on. However, the conventional tension leveler
As shown in Figure 1, bridle roll a on the unwinding machine side and bridle roll c on the winding machine side are arranged horizontally.
Work rolls b and d are provided between the bridle rolls a and c, and the work rolls b and d are pushed between the bridle rolls a and c toward the strip e to be transferred with the required tension to apply the necessary plastic bending force. In addition, since both bridle rolls a and c and work rolls b and d were supported by separate frames, the span between bridle roll a and work roll b and the span between bridle roll c and work roll d were large. Therefore, strip e was not sufficiently constrained in this span. Therefore, meandering or deviation occurs in the strip during shape correction, which hinders proper correction work. Furthermore, the device was not compact and required a large installation space.

The tension leveler of the present invention was developed in order to eliminate such inconveniences, and includes a plurality of bridle rolls arranged vertically and rotatably in a housing, and the tension leveler is stretched between the upper and lower bridle rolls. A device for driving bridle rolls is provided at a predetermined position so that the strip can be transferred with the required tension, and a plurality of work rolls are provided within the housing to apply plastic bending force to the strip between the upper and lower bridle rolls to cause skin elongation. established,
The strip entry direction and the strip take-out direction are configured to allow a large strip winding angle on each of the bridle rolls, and a roll having a strip winding action is provided between the bridle roll and the work roll. This is a characteristic feature.

An embodiment of the present invention will be described below with reference to the drawings.

1 is a strip, 2 is an entry side bridle roll made of hard rubber, and 3 is an exit side bridle roll made of hard rubber like the entry side bridle roll 2. Both bridle rolls 2 and 3 are It is connected to a device (not shown) for driving both bridle rolls 2, 3 so that the strip 1, which is stretched between both bridle rolls 2, 3, can be transferred with the required tension. 5,6
is a work roll that is disposed between the bridle rolls 2 and 3 and applies a plastic bending force to the strip 1 that is transferred between the bridle rolls 2 and 3 with a required tension, and one of the work rolls 5 is a back Support frame 9 via support rolls 8, 8
The other work roll 6 is supported by the support frame 1 via back-up rolls 10, 10.
1, and the mesh (rolling distance) of the work rolls 5, 6 can be adjusted by moving the support frames 9, 11 forward and backward (by hydraulic cylinders, etc., not shown). 4,
7 is bridle roll 2, 3 and work roll 5,
Winding rolls provided between 6, 12 and 13 are presser rolls, 14 is a deflector roll, 15 and 16
1 shows bridle rolls disposed at the front and rear of the housing 17.

The strip 1 is wound around the bridle roll 2 on the entry side with a winding angle θ sufficient to provide the necessary tension for straightening the strip 1 between the bridle roll 2 and the bridle roll 3 on the exit side. It is wound on the exit side bridle roll 3 via the application roll 4, work rolls 5, 6, and winding roll 7 at a required winding angle θ in the same manner as described above, and is transported in the direction of the arrow. At this time, the strip 1 is given the necessary tension for straightening between the bridle rolls 2 and 3, and the plastic bending force necessary for straightening is given by the work rolls 5 and 6, so that the strip 1 is not warped, waved, or elongated. Various shape defects such as mid-elongation are corrected.

3 and 4 are diagrams explaining other embodiments of bridle rolls arranged in front and rear of the housing 17 of the tension leveler, where 17 is the housing, and 18, 19, 20, and 21 are all bridle rolls. Showing roll. Note that the winding rolls 4 and 7 may be fixed in position.

According to the tension leveler of the present invention, a plurality of bridle rolls are vertically opposed and rotatably provided in the housing, and the bridle is arranged so that the strip stretched between the upper and lower bridle rolls can be transferred with a required tension. A device for driving the rolls is provided at a predetermined position, and a plurality of work rolls are installed in the housing to apply plastic bending force to the strip between the upper and lower bridle rolls to stretch the skin. Since the span of the strip can be made extremely small, the restraint force on the strip in the width direction can be made strong. This eliminates meandering and unevenness of the strip during shape correction.
By driving the bridle roll, uniform tension can be applied to the strip in the width direction. Therefore, the correction effect due to work roll bending is more pronounced than in the conventional case. Furthermore, since a winding roll is provided between the bridle roll and the work roll, the winding angle of the strip with respect to the bridle roll can always be kept constant regardless of the amount of reduction of the work roll, and stable tension can be obtained. Furthermore, the bridle roll is constructed so that the strip can be wrapped at a large angle, and since neither the work roll nor the wrapping roll is supported by the bridle roll, the bridle roll is made of rubber with a high friction coefficient. The ability to use similar materials makes it possible to apply extremely high tensions to the strip, thereby dramatically improving its ability to correct its shape. Further, since the structure described above allows for compact manufacturing, and since the bridle rolls are disposed vertically facing each other, the installation area of the leveler can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional tension leveler, Fig. 2 is an explanatory diagram of an embodiment of the tension leveler of the present invention, and Figs. It is a figure explaining another Example of a bridle roll. 1 is a strip, 2 is an entry side bridle roll, 3 is an exit side bridle roll, 4 and 7 are winding rolls, and 5 and 6 are work rolls.

Claims (1)

[Claims] 1 A plurality of bridle rolls are provided in a housing so as to be freely rotatable, facing each other vertically, and a device for driving the bridle rolls is placed at a required position so that the strip stretched between the upper and lower bridle rolls can be transferred with the required tension. and a plurality of work rolls are provided in the housing to apply plastic bending force to the strip between the upper and lower bridle rolls to stretch the surface of the strip, and the strip is rolled so as to increase the winding angle of the strip on each of the bridle rolls. 1. A tension leveler characterized in that a roll is provided between the bridle roll and the work roll and has a strip winding action, defining an entrance direction and a strip take-out direction.