JPS58135726A - Inlet guide device for hot leveler - Google Patents

Abstract

PURPOSE:To smoothly lead the end part of a rolling material, by constituting a hot leveler inlet guide device of a reduction preventing device which drops onto the mateial and is fitted, and an incline-moving guide which is capable to varying a set angle. CONSTITUTION:When guiding the tip part of a material S at the time of start of leveling, an inclined angle of an incline-moving guide 7 is taken large, a reduction preventing device 6 is lifted, a holding roll 61 is made in an open state, and it is led to a leveler 2. Therefore, even if the tip part of the mateiral collides with the belt, no strong impact is given to the tip part, and it is guided smoothly. Also, when rolling has ended, he incline-moving guide 7 descends until it becomes a horintonal attitude, in a state that circulation driving of the belt is continued, simultaneously, the reduction preventing device 6 also descends, and the holding roller 61 elastically holds the surface of the material S. In this way, the tension of the material S led by the leveler 2 is held suitably, also as for the rear end part of the material, a strip is made to pass through in a state that the incline-moving guide 7 has been pinched by suitable pressure against a hot run table 8, and flapping and reduction are not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an artificial guide device for smoothly guiding the end of hot rolled material to a hot level in a hot strip mill.

In a hot strip mill, as shown in FIG. 1, a hot leveler 2 is installed between a final stand 1 and a down coiler 6 to flatten the material S after rolling. Conventionally, the structure around the hot level was level 2.
A pinch roll 4 or a fixed inclined guide 5 was provided on the entrance side of the pipe to guide the end of the material S.

However, in the case of the fixed inclined guide 5, the leading end of the material collides with the inclined guide 5 during leveling, causing ten scratches, and in the case of the pinch roll 4, the rear end of the material passes through the final stand 1, When the tension between the leveler 2 and the finishing L stand 1 becomes zero, the rear end sT of the material flutters as shown in FIG. 2, and the pinch rolls 4 cause the material to be squeezed. For this reason, the pinch roll 4 and the leveling roll 21 are inconveniently scratched, and the roll scratches are transferred to the finished product.

SUMMARY OF THE INVENTION An object of the present invention is to provide an artificial guide device that can smoothly guide the front and rear ends of a material during leveling, in order to overcome the drawbacks of the conventional structure.

As shown in FIG. 6, the leveler inlet guide device 6 of the present invention includes a presser roller 61 that elastically presses down and engages the material surface, and a presser roller 61 that elastically engages the material surface when the leading end of the material passes and when the rear end of the material passes. The present invention is characterized in that it is combined with a tilting guide 7 that guides by changing the guide angle, and is provided at the entry side position of the leveler 2.

The presser roller 61, which presses into contact with the surface of the material, is lowered only when desired by the operation of a drive unit 62, such as a hydraulic cylinder, to press the material. This presser roller 61 is supported by a head 64 that has a built-in buffer mechanism 63 such as a spring, so that it can elastically press against the surface of the material.
The lowering position of the presser row 261 is set to be equal to the thickness of the material S passing through.

The tilting guide 7 installed upstream of the squeezing prevention device 6 fill +7ζ is a guide having a moving guide surface using an endless circulation belt system, and has a structure in which the material guide surface moves downstream at the same or faster speed than the threaded material. At the same time, the inclination installation angle of the entire guide is configured to be variable using the rotation axis 71 on the downstream side as a fulcrum, and the guide angle can be changed to a desired state according to the guiding conditions of the material S. I hope you don't get caught.

The lowering position of the guide surface in the tilting guide 7 is set at a position 2 to 3 cm higher than the thickness of the No. 14 material plate, but this is set at a position lower than the roll center position when the upper leveler roll is lowered.

Next, the operation of the device of the present invention will be explained. First, when guiding the leading end of the material S at the start of railing, the angle of inclination of the tilting guide 7 is increased as shown in Figure 3 of the vehicle, the squeezing prevention device 6 is raised, the presser roll 61 is opened, and the leveler is moved. Guide to 2.

At this time, the bolt of the tilting guide 7 is driven to circulate at the same speed as the threading material or at a faster speed.

For this reason, even if the leading edge of the material collides with the belt, it can be guided smoothly without applying a strong impact to the leading edge due to the inclination and running of the belt.

The above-mentioned state continues until just before the rear end of the material S comes off the final stand 1.

Eventually, when the rolling is completed, the rear end j, +, I! of the material S!
will make ashes from the final stand 1. At this time, as shown in FIG. 4, the movable guide 7 is lowered until the belt is in a horizontal position (while continuing to drive the IS ring), and at the same time the squeezing prevention device 6 is also lowered and the presser roller 61 is pressed against the material S. As a result, the tension of the material S guided to the leveler 2 is appropriately maintained, and the rear end sT of the material is properly placed between the tilting guide 7 and the hot run table 8. The sheet is threaded while being clamped by pressing force.

In this way, the rear end ST of the material does not fluttering or constricting.

The point in time when the material leaves the final stand can be detected by, for example, operating the present device based on a detection signal from the final stand 1 or the previous stand.

As described above, according to the inlet guide device of the present invention, it is possible to smoothly guide the material to the tray without causing any collision, flapping, squeezing, etc. of the end of the rolled material, thereby preventing roll defects. This eliminates the occurrence of this problem and improves the quality of the rolled material.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the conventional configuration of the vicinity of Layla in a hot strip mill. Figure 2 is a drawing showing the state of Figure 1 when the ash has been removed. FIG. 5 is a schematic diagram of the vicinity of a leveler equipped with an entrance guide device according to the present invention. Figure 4 is a drawing showing the state of Figure 3 when the ash is removed. 1: Final stand 2: Hot leveler 6; Down coiler 6: Squeezing prevention device 7: Tilting guide 8
:Hot run table 9:Load cell S:
Rolled material patent applicant Sumitomo Metal Industries, Ltd.

Claims (1)

[Claims] An artificial guide device disposed on the entry side of a hot leveler in a hot strip mill, which includes a presser roller that elastically presses against the material surface, and a squeezing prevention device that descends and engages onto the threaded material when desired by a drive unit. and a tilting guide disposed on the upstream side of the squeezing prevention device, having a moving guide surface made of an endless circulation belt, and having a variable installation angle with the downstream side as a fixed fulcrum.