JPH0337775Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a rolled steel plate shape straightening device (hereinafter referred to as "shape straightening device") that corrects the shape of a rolled steel plate by passing the rolled steel plate between a plurality of work rolls arranged in a staggered manner. , Leveler).

[Prior Art] Shape straightening of rolled steel plates using a leveler is widely used for straightening cold rolled steel plates and hot rolled steel plates. The structure of a conventional correction leveler is shown in FIGS. 3 and 4.

The conveyed material 1 is repeatedly bent by a work roll 2 reinforced by a back-up roll 3 to be flattened. The work roll 2 and the backup roll 3 are held tightly in the rotational direction of the rolls by a work roll chock 4 and a backup roll chock 5, respectively. As shown in FIG. 5, the work roll mounting mechanism in this conventional device is such that the work roll 2 is loaded into a work roll chock 4, and the work roll 2 is rotated via a radial bearing 9. Thrust bearing 6 at the end of the work roll
The work roll 2 was fixed with a bearing nut 10, and the work roll 2 could not be moved at all in the roll axis direction.

[Problems to be solved by the invention] Therefore, in this conventional device, the back-up roll 3 always hits the same spot on the work roll 2, and the push mark of the back-up roll 3 is left on the work roll 2, which marks the surface of the conveyed material. Striped roll marks 7 appeared on the surface of the product 1, degrading the quality of the product. To prevent this phenomenon, conventionally,
The work rolls and back-up rolls had to be replaced at short intervals, resulting in a shortened roll life and reduced equipment operation rate. Note that some methods have been proposed for shifting the work rolls using a drive mechanism (Japanese Patent Application Laid-open No. 122629/1983).
The device itself became large and was not always satisfactory. As a result of studies based on the problems of the current state of the art, this invention has been developed to improve product yield and extend the life of rolls by preventing the striped roll marks 7 from being transferred to the conveyed material. This was achieved using compact equipment that does not require

[Means for solving the problems] The present invention to achieve the above objects is as follows: (1) The rolled steel plates being threaded are arranged in two rows, upper and lower, in a staggered manner, reinforced by back-up rolls. In a rolled steel sheet straightening machine that straightens the shape of a rolled steel plate by applying a bending process between a plurality of work rolls, a gap is formed in a roll chock that holds the work roll to allow the work roll to shift in the axial direction. This is a rolled steel plate shape straightening machine that is capable of shifting by utilizing the oblique force of the threaded material.(2) A self-aligning bearing is installed in the radial bearing that supports the work roll horizontally. (3) A utility model characterized in that claim 1 is a rolled steel plate shape straightening machine, and (3) a link pin is provided at the joint between the work roll chock and the leveler body frame. This is a rolled steel plate shape straightening machine as claimed in claim 1.

[Example] The details of the present invention will be explained below with reference to the drawings.

FIG. 1 is a detailed structural diagram of the work roll bearing section of the present invention. In the figure, 1 is the threading material, 2 is the work roll, 4 is the work roll choke, 6 is the thrust bearing provided at the end of the work roll 2, 8 is the choke cover, 14 is the radial bearing, and 13 is the leveler body frame ( The housing is fixed to the work roll chock 4 with bolts (not shown).

In the apparatus of this embodiment, a notch m is provided in the work roll chock 4, and a thrust bearing 6 is inserted into the notch m to form a gap that allows the work roll 2 to shift in the axial direction. Therefore, in this device, when the threaded material 1 walks in the width direction, the work roll 2 can also move in the axial direction.

In FIG. 1, the work roll 2 can be moved to the left by a gap a and to the right by a gap b. The rolled steel plate shape straightening leveler of the present invention can shift the work roll in the axial direction and change the relative position between the work roll and the back-up roll, thereby preventing roll marks from the back-up roll from being formed on the work roll. . Furthermore, it is possible to prevent this from being transferred onto the conveying material.

To explain this point in detail, the conveyed material 1 is subjected to a force in a direction perpendicular to the conveying direction 15 due to the influence of the EPC device of the unwinding machine, etc., and moves obliquely.

At this time, the work roll 2 is pulled by the oblique force of the threaded material 1 and rotates while being randomly displaced in the roll rotation direction.

On the other hand, the back-up roll 3 is rotated by the back-up roll yoke 5 without moving in the direction of the roll axis, as shown in FIG.
Therefore, backup roll 3 and work roll 2
rotates while being relatively displaced in the axial direction, thereby preventing the back-up roll 3 from leaving press scratch marks on the surface of the work roll.

Further, in the embodiment shown in FIG. 1, the radial bearing 14 is equipped with a self-aligning mechanism in order to prevent the radial bearing 14 from locking due to the shift caused by the deflection of the work roll 2.

In this embodiment, the work roll chock 4 is fixed to the leveler body frame 13 with bolts or the like, and the straightening reaction force is supported by a radial bearing 14 attached to the shaft end of the work roll 2. ing. A suitable gap is provided between the radial bearing 14 and the work roll 2, and the leveler roll 2 is held so that it can rotate while being freely displaced in the axial direction. However, in order to prevent this amount of displacement from becoming excessive, the sum of gaps a and b for displacing the thrust bearing at the end is 1 to 20 mm.
It is desirable to keep it below the level below.

In FIG. 2, the work roll chock 4 and the leveler body frame 13 are connected by a link pin 12 instead of the self-aligning radial bearing 14 shown in FIG. Even in this case, the lock phenomenon can be sufficiently prevented.

[Effects of the invention] The effects of the invention are (1) Since no roll shift power source is required, the equipment becomes extremely compact. Energy saving can be achieved.

(2) The product quality is significantly improved without stripes caused by roll marks appearing on the surface of the threaded material.

(3) The lifespan of work rolls is significantly improved, the operating rate of the entire equipment is improved, and significant resource and labor savings can be achieved.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams showing an apparatus according to an embodiment of the present invention;
FIG. 3, FIG. 4, and FIG. 5 are diagrams showing the prior art.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rolled steel plate being passed through a plurality of work rolls arranged in a staggered manner in two rows above and below, reinforced by back-up rolls, to be bent into a shape. In a shape straightening machine for flattening a rolled steel plate, a gap is formed in the roll chock that holds the work roll to allow the work roll to shift in the axial direction, and the force of the diagonal movement of the material through which the work roll is passed is utilized. A rolled steel plate shape straightening machine characterized by being shiftable. (2) The rolled steel plate shape straightening machine according to claim 1, which is a utility model, and is characterized in that a self-aligning bearing is provided in a radial bearing that horizontally supports a work roll. (3) The rolled steel plate shape straightening machine according to claim 1 of the utility model registration claim, characterized in that a link pin is provided at the joint between the work roll chock and the leveler body frame.