JPS58173003A - Rolling device - Google Patents

Abstract

PURPOSE:To prevent the coil break of a strip without any influence on operation and maintenance in a rolling device which applies tension to the strip and has a mechanism for measuring tension by providing a device for measuring tension to a bridle roll. CONSTITUTION:A bearing arm 10 having integrally the roll 9 nearest the mill 6 in a bridle roll group 8 which applies tension to the strip 7 on the inlet side of the mill 6, and the tension of the strip 7 which acts on the roll 9 is converted to the turning force of the roll 9 with a load cell 14 between the arm 10 and a supporting frame 12 so that the turning force of said roll is exerted on the cell 14. The tension of the strip 7 on the inlet side of the mill is thus measured with the group 8 itself.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling apparatus that is equipped with a group of priddle rolls that apply tension to a strip on the entry side of the rolling mill and has a mechanism that measures the tension applied to the strip.

In rolling equipment equipped with a group of prydle rolls that apply tension to the strip at the entrance side of the mill (rolling mill), when controlling the tension on the input side of the mill, a roll group for tension measurement is conventionally installed between the group of prydle rolls and the mill. However, such a configuration may cause the strip to bend.

That is, in the conventional apparatus, a priddle roll group 3 consisting of at least two or more rolls for applying tension to the strip 2 is provided on the entrance side of the mill 1, and this is used to apply tension to the strip 2 and control the tension. For this reason, a tension meter 4 consisting of three rolls is provided between the mill 1 and the priddle roll group 3. Said 3
A load cell 5 is provided below the bearing of the central roll in the book roll to measure the vertical force. Based on the value measured by the load cell 5, the tension applied to the strip 2 is determined by the amount of mill reduction or rolling reduction. Control is performed according to changes in speed.

However, in such a device, the strip 2 is pressed against the three rolls of the tension meter 4, and the reverse facets of the strip 2 are pressed against each other, which may cause the strip 2 to bend at the front end. It is noticeable in the immediately following strip. Conventionally, in order to avoid such bending of the strip, the diameter of each roll of the tension meter 4 was made extremely thick (for example, 500+++ m), and for this reason, the behavior of the strip 2 near the rolls on the entry side of the mill was difficult to understand from the operator's perspective. This made it difficult to see and significantly reduced work efficiency. Further, it is not preferable to install three large-diameter rolls in this manner from the viewpoint of maintainability of the rolling apparatus.

An object of the present invention is to measure the tension applied to a strip using a simple mechanism without causing any bending in the strip in a rolling machine equipped with a group of priddle rolls for applying tension on the inlet side of the rolling mill. The objective is to provide a rolling equipment that can

The present invention provides a rolling apparatus comprising a group of prydle rolls for applying tension to a strip on the entrance side of the rolling mill and a mechanism for measuring the tension applied to the strip, in which a predetermined roll in the group of prydle rolls is provided. The present invention is characterized in that a tension measuring device is provided in a region where the strip is operated by tension to measure the tension (Cfx).

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 2 is a diagram schematically showing a rolling apparatus according to an embodiment of the present invention, which is equipped with a priddle roll group 8 consisting of at least two rolls for applying tension to the strip 7 on the entrance side of the mill 6.

In this embodiment, this roll 9 is the one closest to the mill 6 in the priddle roll group 8.
A bearing arm 1o is provided to support the roll 9, and the roll 9 is rotatably mounted via a bearing arm support pin 11 and rotatably attached to the support frame 12 of the priddle roll group. Further, a load cell 14 for measuring tension is interposed between the arm 10 and the support frame 12 under the bias of a support spring 13. In the figure, arrow A indicates the direction in which the strip 7 passes.

In such a rolling apparatus, the strip 7 is tensioned by a group of priddle rolls 8 and fed along arrow A to the entry side of the mill 6. When the strip 7 passes over the roll 9 of the group of priddle rolls 8, the tension or the change in tension! I! l1l-1: Converted to rotational force around the support bin 11 of the bearing arm 10 of the roll 9,
When this rotational force acts on the load cell 14 interposed between the bearing arm 10 and the support frame 12, a detection output regarding the tension of the strip is obtained from the load cell 14. Similarly, when no tension is applied to the support spring 13r1 strip 7, a biasing force is applied to prevent the roll 9 from tilting in the opposite direction.

As described above, in the embodiment of the present invention, in a rolling apparatus equipped with a group of prydle rolls 8 that applies tension to the strip 7 provided on the entrance side of the mill 6, the mill 6 in the group of prydle rolls 8 is A bearing arm 10 integrally having a close roll 9 is rotatably provided with respect to a support frame 12, and these bearing arms 10 and support) V-
A load cell 14 for tension measurement is interposed between the roll 90 and the roll 90 to measure the tension of the strip 7.
Since it is configured to convert into rotational force and apply it to the load cell 14, the tension of the strip 7 on the mill entry side can be measured (5) by the priddle roll group 8 itself, and the tension in the strip 7 during the passage of the strip 7 as in the conventional method can be measured. There is no need to separately provide a roll group for measurement.

Therefore, there is no problem of bending of the strip 7 due to it being passed through the measurement roll 1) 1'', and the tension measurement mechanism itself is simply provided with a support frame 12 for the roll 9 on the exit side of the priddle roll group 8. Since it is simple, it causes almost no problems in terms of work and maintenance.

As with steaming, according to the present invention, the tension applied to the strip by the group of pre-roll rolls in the rolling mill can be measured with a simple structure without causing any damage to the strip.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an overview of a conventional device, and FIG. 2 is an explanatory diagram showing an overview of an embodiment of the present invention.

Claims (1)

[Claims] 1. In a rolling machine having a group of prydle rolls that apply tension to the strip on the entrance side of the rolling mill and a mechanism for measuring the tension applied to the strip, the strip of a predetermined number of rolls in the group of prydle rolls The rolling apparatus is characterized in that a tension measuring device is provided in an operating area due to tension to measure the tension.