JPS61197354A - Looper apparatus - Google Patents

Abstract

PURPOSE:To simplify a looper apparatus by arranging rollers at the both edges of a frame and clockwise turning the frame and adjusting the loop amount by controlling only the turning angle of the frame, in a looper apparatus for strip steel of the continuous hot press equipment. CONSTITUTION:A looper apparatus 2 for strip steel which is installed between a rolling mill group 3 and a bar-member jointing machine 1 consists of two pairs of pinch rollers 10 and 11, speed detectors 4 and 5, frame 12 which crosses with a pass line and is rotatable, looping rollers 7 and 8 arranged at the both edges of the frame 12, driving apparatus for revolving the frame 12, controller 6 for controlling the revolution, etc. Therefore, a loop is formed through the pushing-down operation of one looping roll 8 for the bar member 10 by the revolution of the frame 12 and the pushing-up operation of the other looping roll 7 for the bar member 10. The speed of the bar member 10 on the outlet side of the jointing machine and the speed on the inlet side of the rolling mill group are detected by the detectors 4 and 5, and the driving apparatus of the frame 12 is controlled according to the difference between the above-described detected values, and the loop amount can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to continuous hot rolling equipment, and particularly to a looper device for steel strip suitable for continuous hot rolling equipment.

[Background of the invention]

The looper device installed between the rolling mill group and the joining machine is -
For example, as shown in Japanese Unexamined Patent Publication No. 58-154410, a loop is formed by a plurality of speed-variable pinch rolls and a lifting roll provided in relation to the pinch rolls.

However, in hot rolling equipment, the installation space for the looper device is limited, the control method and structure for controlling multiple pinch rolls and lifting rolls at the same time are complicated, and the contact between the pinch rolls and lifting rolls and the steel strip It is not possible to install a delay table due to the occurrence of defective parts or loop formation in the steel strip due to the low local temperature of the steel strip, and the minimum bending radius of the loop cannot be made small because the steel strip is thick.
There were drawbacks such as the distance between the pinch rolls being narrowed and the usual rolling of each slab being impossible.

[Purpose of the invention]

The purpose of the present invention is to simplify and downsize a looper device for strip steel provided between a rolling mill group and a welding machine, improve controllability, and provide a looper device that can handle both conventional rolling and continuous rolling. There is a particular thing.

[Summary of the invention]

The outline of the present invention is to form a loop by a smaller group of pinch rolls and a group of rolls corresponding to the lifting rolls of the conventional example, and by making the rolls move planetarily, the device can be simplified and miniaturized. Furthermore, in order to reduce the number of objects to be controlled, the present invention adjusts the loop amount by controlling only the rotation angle of the frame with a-rules arranged at both ends. It is possible to have a table and perform both conventional hot rolling and continuous hot rolling without changing the equipment.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows the arrangement of equipment, where 1 is a bar material joining machine, 3 is a finishing pressure IA group, and the looper device 2 of the present invention is located between 1 and 3. As shown in FIG. 2, the looper device includes two sets of pinch rolls 10 and 11, a speed detector 4.5 for detecting the speed of the pinch rolls, a rotatable frame 12 that intersects the pass line, and disposed at both ends of the frame 12. a rotatable looping roll 7.8, a roller frame 14. semi-fixed to the frame 12; table low 2 group 9
, a stop collar 13° that stops the rotation of the roller frame, and a semi-fixing spring 15 that semi-fixes the frame 12 and roller frame 14. It is composed of a pin 16, a drive device 17 that rotates the frame, and a control device 6 that controls the rotation of the frame.

3 and 4 show the process of forming a loop by the looper device of the present invention. First, with no loops formed at all, the looping rolls 7.8 are positioned below the bar material 15 and above 8ri without contacting the bar material, as shown in FIG. In addition, table roller group 9,
The roller frame 14 is connected to the frame 12 via a spring 15.
Although the half-hour hand tries to rotate in the direction of the half-hour hand, it is stopped by the stopper 13 and maintains the pass line.

Next, when the frame 12 is gradually rotated clockwise, the looping roll 7 first pushes up the bar material 15, and the bar material is separated from the table roller group 9, resulting in the state shown in FIG. 3.

Here again, the table roller group 9 maintains the pass line, but the roller frame 14 is fixed to the frame 12 by the spring 15 and the pin 16 fixed to the 7-frame 12, and begins to rotate as one. Further, when the frame 12 is rotated clockwise, the looping roll 8 pushes down the bar material 15 and begins to form a loop in earnest.

In this way, when the frame 12 is rotated clockwise until the looping roll 7.8 has the positional relationship shown in FIG. 4, the amount of loops accumulated is as follows:
m, and when the looping roll diameter is 2 m, it is approximately 33 m.

Release of the formed loop is performed by an operation completely opposite to that of loop formation.

The looper device of the present invention forms a loop only by rotating the frame 12, and the loop amount is a function of the rotation angle of the frame 12, so the control is controlled by the pinch roll lL;
Since it is only necessary to detect the speeds 1i+4.5 at 10 and 11 and control the drive IIh device 17 by the control device 6, the control is simple and easy.

In addition, in this example, when the loop t is 33 m, the installation space for the equipment is 12 m in the pass line direction and 8 m in height.
However, if a loop is formed by two lifting rolls in the same installation space, the loop t will be 24 m, and this embodiment can provide a larger loop amount for the same installation space.

Furthermore, according to this embodiment, the table roller group 9 does not come into contact with the bar material 15 during loop formation, so that the local temperature of the hot bar material is less likely to decrease and the occurrence of defects in the product board can be reduced. Also, as shown in FIG. 5, the looping roll 18. 1
By using rolls having a group of 9K small ff1o loose fi rolls, the contact area between the bar material and the looping roll is minimized, and the effect of preventing a local temperature drop in the hot bar material can be increased.

Furthermore, since the looper device of the present invention has table rollers, it is possible to perform both ordinary slab unit rolling and continuous hot rolling (end V hot rolling) without changing the equipment.

〔Effect of the invention〕

According to the present invention, improvement in controllability and downsizing of equipment, l@
The effect of roughening is so great that it can be applied to both conventional slab unit rolling and continuous hot rolling without changing equipment.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a plan view and side view of FIG. 1, and FIGS. 3 to 5 are side views of other embodiments. 1... Bar material joining machine, 2... Looper device, 3...
Rolling mill rate 3 figure also t4- figure

Claims (1)

[Claims] 1. In a looper device disposed between a joining device and a rolling mill group, a frame and rollers are disposed at both ends of the frame,
As the frame rotates, one roller pushes down the bar material, and the other roller pushes up the bar material, forming a loop, and detecting the exit speed of the bar material from the joining machine and the entry speed of the rolling mill group. A looper device characterized in that a loop amount is adjusted by controlling a driving device of the frame based on the difference in the width. 2. In claim 1, the rollers at both ends of the frame are driven by the bar material or form a loop;
A looper device characterized by being rotationally driven in accordance with discharge. 3. A looper device according to claim 1, characterized in that the rollers at both ends of the frame include a group of planetary rolls. 4. The looper device according to claim 1, characterized in that a group of table rollers is semi-fixed to the frame.