JPH0347626A - Device for straightening rolling roller - Google Patents

Abstract

PURPOSE:To straighten the shape in accordance with ununiform distribution of mechanical properties in the direction of sheet width by changing optionally the crown of a working roller in parallel with the capacity and movement of the crown given to intermediate rollers. CONSTITUTION:Roller crown gradually increased, gradually decreased, gradually increased from one axial end is carried out on each of the intermediate rollers 2a and 2b, they are arranged in point symmetry to the center of the working roller 1 and the working roller 1 is supported in the direction of the barrel length. When a motor 8 is driven and a symmetrical cylinder 6 is moved in the direction A, the intermediate rollers 2a, 2b are moved by hydraulic cylinders 5a - 5d respectively in the opposite direction to give the crown to the working roller 1. Consequently, defective shape caused by ununiformity of mechanical properties in the width direction of the steel strip is prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shape straightening device for a steel strip, and particularly to a device that applies tension to a steel strip and repeatedly bends it with rollers to straighten the shape. In particular, the present invention relates to a straightening device suitable for preventing the occurrence of shape defects caused by non-uniform mechanical properties in the width direction of a steel strip.

[Conventional technology]

Defects in the shape of steel strips are caused by non-uniform elongation in the width direction of the strip, so by giving the steel strip an elongation equivalent to the non-uniform elongation, the deformation caused by the difference in elongation can be corrected. Ru. Among these straightening devices that provide elongation, there is a tension leveler that applies tension to a steel band and repeatedly bends it using small diameter rollers to obtain elongation. However, if there is non-uniformity in mechanical properties (mainly yield point) in the width direction of the steel strip, if uniform elongation is applied in the width direction,
When the tension is unloaded, the difference in the amount of elastic recovery appears as a difference in elongation, resulting in a shape defect. In order to prevent these shape defects from occurring, for example, Japanese Patent Application Laid-Open No. 58-167
No. 022 and Japanese Patent Publication No. 61-47607, a tapered crown is provided at the end of the working roller that contacts the steel strip and bends it, and the crown at the end of the roller moves in the axial direction, and the crown at the end of the roller is placed within the width of the strip. A straightening machine was devised in which a wedge is inserted into the mounting seat of a reinforcing roller that divides and supports one work roller in the longitudinal direction of the body, giving bending deformation to the work roller to create a roller crown effect. has been done. The purpose of these mechanisms is to make the travel length of the strip between adjacent rollers equal to the non-uniform distribution of mechanical properties in the strip width direction, thereby reducing the occurrence of elongation differences. It is to prevent it.

[Problem to be solved by the invention]

In the above conventional method, it is necessary to have two mechanisms, a roller crown and a roller bend, and use them properly depending on the shape of the non-uniform distribution of mechanical properties in the width direction of the steel strip to be straightened. It was undeniable that the orthodontic device would be complicated.

The object of the present invention is to realize the two functions of the conventional roller crown and roller bent with one mechanism, which is caused by the non-uniformity of the mechanical properties of the steel strip in the width direction.

An object of the present invention is to provide a correction device suitable for preventing shape defects.

[Means to solve the problem]

The present invention provides an intermediate roller in a roller group consisting of a work roller that applies bending to the steel strip in a straightening device, two intermediate rollers that support the work roller, and a reinforcing roller that supports the intermediate roller divided in the lengthwise direction of the body. The roller is provided with a roller crown that gradually increases, gradually decreases, and gradually increases from one end of the body, and the work roller is supported so that the roller crown is point symmetrical with respect to the center of the work roller, and the intermediate rollers are supported opposite each other. By moving the work roller in the axial direction, the contact point between the work roller and the intermediate roller changes in the roller axial direction, and the vertical displacement distribution of the work roller can be changed from convex to concave depending on the position of the intermediate roller. Since the work roller crown can be set freely just by moving the intermediate roller,
This makes it possible to correct the shape of the material to be corrected in response to non-uniform distribution of mechanical properties in the width direction of the material.

[Effect]

Two intermediate rollers that support the work roller are provided with a roller crown that gradually increases, gradually decreases, and gradually increases from one shaft end, and the work roller is supported so that the roller crown is point symmetrical with respect to the center of the work roller.

Further, the intermediate roller is divided and supported by three rows of reinforcing rollers. Here, assuming that the intermediate roller follows the reinforcing roller due to the roller crown, and that the work roller follows the intermediate roller, the roller crown is expressed by a function f(x), and the displacement of the axis of the work roller is expressed as the function f(x). This will be explained using Figure 3.

The reinforcing rollers 3a, 3b, and 3c have the same diameter, and the reinforcing rollers 3a, 3c are located at symmetrical positions with respect to 3b.

Further, the intermediate roller diameters 2a and 2b have the same diameter, and a roller crown f(x) is applied thereto, and f (x)
has the following relationship.

f (x) + f (fl-x) = OX: distance from trunk length Q: trunk length Intermediate rollers 2a, 2b and reinforcing rollers 3a, b.

The positional relationship of C is determined geometrically and can be expressed as below.

2(Ra+R++f(x)) LXT1=(R
B+RI+f(x))Xsinθly+t=(Ra+R
t+ f (x))Xcosθ1XI2=(RB+RI
+ f (Q −x))Xsinllllzy+z=(R
a+Rr+ f (Q-x)) '(b -5in 03)xw=-(
Rw+R++ f (x)) sinf73+ xIsy
w=(Rw+ R++ f(x))cosOa+-y
It becomes 11.

Here, an example of calculating yw will be shown for the case where f (x) is the following formula.

L: Intermediate roller body length (=160nn)
Distance from cylinder end (1n) Work roller diameter φ30 (I
IITI) Intermediate roller diameter φ40 (mm) Reinforcement roller diameter φ75 (n) L=79 (mm) H=37;5 (nun) Figure 2 shows the calculation results, and depending on the direction and amount of movement of the intermediate roller , the axial center position of the work roller changes from convex to concave, and this change makes it possible to obtain a difference in the stroke of the straightening material between adjacent rollers, which can prevent materials with mechanically uneven distribution in the sheet width direction. shape correction becomes possible.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The work roller 1 is supported in the longitudinal direction of its trunk by intermediate rollers 2a and 2b, and the intermediate rollers 2a and 2b are supported in a staggered manner by a group of reinforcing rollers 3 in the longitudinal direction of their trunks. The intermediate roller is provided with a roller crown that gradually increases, gradually decreases, and gradually increases from one shaft end, and is arranged point-symmetrically with respect to the center of the work roller 1 to support the work roller 1 in the lengthwise direction of its body. . The body lengths of the intermediate rollers 2a and 2b are longer than the body length of one work roller 1 by the movable length thereof, and thrust bearings 4 are installed at the shaft ends of each of the intermediate rollers 2a and 2b. .

A hydraulic cylinder 5a is in contact with the thrust bearing 4.

5b, 5c, and 5d are fixedly installed on the leveler frame 10. The hydraulic cylinders 5a to 5d are driven by a tuned cylinder 6, which is driven by a worm jack 7, which is driven by a motor 8. By driving the motor 8 and moving the synchronized cylinder 6 in the direction A, the intermediate rollers 2a and 2c are moved by the hydraulic cylinder 58.
~5d, respectively, to move in opposite directions to apply a crown to the working roller 1.

According to this embodiment, the thrust force acting on the thrust bearing 4 during movement of the intermediate rollers is
and work roller 1. Since only the sliding resistance occurs between the reinforcing roller group 3, the intermediate roller 2a,
By moving 2b, the thrust force acting on the thrust bearing 4 can be made very small, which has the effect of extending the life of the thrust bearing 4. Also,
Since the hydraulic cylinders 5c and 5d are fixed to the frame 10 by the bin joyret a, the intermediate roller 2a.

This has the effect of shortening the replacement time of 2b. Furthermore, in this embodiment, the intermediate roller body length is longer than the body lengths of the work roller and the reinforcing roller group, so when the intermediate roller is moved, the intermediate roller body length ends are the working roller and the reinforcing roller group. Since it does not enter the inside of the barrel end in the path direction, it is possible to prevent damage to the roller.

〔Effect of the invention〕

According to the present invention, the crown of the work roller can be arbitrarily changed depending on the amount of crown applied to the intermediate roller and the amount of movement, so shape correction can be performed according to uneven distribution of mechanical properties in the width direction of the plate. You can.

[Brief explanation of drawings]

FIG. 1 is a system diagram of the intermediate roller moving device shown in FIG. 1 of the present invention, and FIG. 2 is a graph showing the relationship between the amount of movement of the intermediate roller of the present invention and the difference in height from the center of the work roller. , FIG. 3 is a layout diagram of rollers in an embodiment of the present invention. 1...Work roller, 2...Intermediate roller, 3...Reinforcement row 10 Fig.

Claims (1)

[Claims] 1. A roller group consisting of two intermediate rollers that support and reinforce one working roller and a plurality of reinforcing rollers that divide and support the intermediate roller in the longitudinal direction of the body is arranged in upper and lower positions. In the steel strip straightening device having one or more sets, the two intermediate rollers are provided with a roller crown that gradually increases, gradually decreases, and gradually increases from one end of the body, and the crown of the intermediate roller is pointed at the center of the working roller. A rolling roller straightening device comprising a group of rollers supported symmetrically and provided with devices movable in opposite directions in the axial direction. 2. In claim 1, the intermediate roller moving device includes:
A rolling roller straightening device characterized by having a hydraulic cylinder and a synchronized cylinder. 3. The rolling roller straightening device according to claim 1, wherein the body length of the intermediate roller is longer than the body lengths of the work roller and the reinforcing roller group by a movable length thereof.