JPS63149009A - Plate pass guide device for rolled stock in rolling mill - Google Patents

Abstract

PURPOSE:To shorten the roll changing time by performing the movement of a plate pass guide and the gap adjustment operation by using an overlap prevention plate for a rolled stock. CONSTITUTION:A gap adjusting screw 12 is set on the overlap prevention plate 8 for a rolled stock and levers 14 are adjustably fixed at both sides of the plate 8 through bolts 15. A sliding plane 19 is fixed on both sides of a plate pass guide 16, which is connected to a bracket 18 by a spring 20. In roll changing, the overlap prevention plate 8 is retracted by a cylinder 9; a top end part 24 of the guide 16 is regulated by a stopper 21. In the case that a dia. of work rolls 3, 3' is changed, adjustment of gaps between an upper roll 25 and the plate 8 and between a lower roll 25' and the guide 16 is performed by only adjustment of the screw 12. Thus, the roll changing time is shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a threading guide for preventing and guiding rolled material, which is installed below the pass line before and after the work rolls of a rolling mill. Regarding equipment.

[Conventional technology]

In the conventional device, as described in Japanese Unexamined Patent Publication No. 48-158 and FIG. 4, the movement of the single plate guide is performed using hydraulic pressure.

Alternatively, this was done using an air cylinder or the like.

Further, as shown in FIG. 4, an adjustment stopper was installed near the threading guide as a mechanism for adjusting the gap between the work roll and the threading guide in response to changes in the diameter of the work roll.

[Problem that the invention seeks to solve]

In the conventional device, as shown in FIG. 4, when changing rolls, the threading guide 25 is moved by expanding and contracting the cylinder 26, etc. These devices include a cylinder 26, a hose 27 for moving the cylinder, piping 28. This requires valves, etc., making the entire device very expensive, and also requires installation space for the cylinder 26, etc., and maintenance space. Furthermore, the gap G between the work roll and the threading guide 25 was adjusted as the diameters of the work rolls 3 and 3' changed by operating a stopper 29 installed near the threading guide. There was a time loss as the operation had to be performed every time one work roll was replaced.

An object of the present invention is to provide a threading guide device that is compact, inexpensive, and has good workability.

[Means for solving problems]

The above-mentioned problem of moving the one-thread guide to the rolling position and roll change position and adjusting the gap between the work roll and the threading guide prevents the rolled material that is above the pass line from being rolled in. This is achieved by using the movement mechanism of the prevention plate.

[Effect]

The threading guide installed below the pass line.

It is held rotatably about a fulcrum, and is tensioned by a spring attached to the opposite end of the sheet passing guide so that the position of the sheet passing guide is always at the roll changing position. That is, when no external force is applied to the sheet passing guide, it is always maintained at the roll changing position. Next, when setting the sheet passing guide to the rolling position, this is done by utilizing the movement of the rolled material prevention plate installed above the pass line. When the rolled material prevention plate descends from the roll change position and moves to the rolling position, the lever attached to the prevention plate moves to the rolling position and stops while pushing down the tip of the sheet passing guide. .

〔Example〕

Hereinafter, one embodiment of a six-high rolling mill will be described with reference to FIGS. 1 to 3.

Fig. 1 is a cross section of the central part of the roll when viewed from the operating side to the drive side in the rolling state, and Fig. 2 is a view from the ■-■ arrow in Fig. 1;
FIG. 3 is a sectional view of the roll rearrangement state in FIG. 1.

First, I will explain the six-high rolling mill. 1 is a reinforcing roll and is rotatably supported by a reinforcing roll bearing box 4, and the reinforcing roll bearing box 4 is housed in a housing 6. Intermediate rolls 2 and 2' are rotatably supported by intermediate roll bearing boxes 5 and 5, and the intermediate roll bearing boxes 5 and 5' are housed in a housing 6. 3 and 3' are rotatably supported by a work roll bearing box 7.7', and the work roll bearing box 7.7' is housed in the housing 6. Reference numeral 8 denotes a rolled material entrainment prevention plate, which is housed in a guide 10 fixed to the housing 6 so as to be vertically movable by a cylinder 9. Reference numeral 11 is a bracket that is fixed at both ends to the housing 6 and supports the cylinder 9. Reference numeral 12 denotes a plate gap adjustment screw for preventing rolled material from being rolled in, and 614, which is held by a stopper 13 fixed to the housing 6, is adjustable with bolts 15 on both sides of the plate for preventing rolling material from being rolled by levers. ing. Reference numeral 16 denotes a threading guide rotatably supported at a fulcrum 17. The fulcrum 17 is held by a bracket 18 fixed to the housing 6. The sliding surfaces 19 are attached to both sides of the sheet passing guide 16. The spring 20 connects the plate passing guide 16 on the side opposite to the lower work roll 3' of the fulcrum 17 and the bracket 18. Stopper 21
is adjustably attached to the bracket 18 between the fulcrum 17 and the spring 20. 22 is a material to be rolled.

Next, the rolled material entrainment prevention plate 8 and the plate passing guide 16
Explain the operation. During roll rearrangement (No. 33I54), the rolling material entrainment prevention plate 8 is placed inside the housing so that the upper and lower work rolls 3 and 3' and the simultaneous receiving boxes 7 and 7' do not get in the way of moving out of the housing 6. It is retracted out of the window 23 by the cylinder 9.

The stopper 21 is adjusted so that the tip end 24 of the plate passing guide 8 is in a spatial position between the material to be rolled 22 and the lower work roll bearing box 7'. Next, when changing from this state to the rolling state (FIGS. 1 and 2), the rolled material entrainment prevention plate 8 is moved to the cylinder 9.
Then, the rolling material entrainment prevention plate gap adjusting screw 12 hits the stripe flange 13 and stops. Further, the threading guide 16 pushes the slide surface 19 attached to the threading guide 16 by lowering the lever 14 attached to the plate 8 for preventing rolled material from being rolled into the material, and brings the tip end 24 of the threading guide into a rolled state. set.

Also, by rearranging the rolls, the upper and lower work rolls are 3°73'.
If the angle changes from 25.25' to 25.25', the upper working hole 25
and the rolled material entrainment prevention plate 8 and the lower work roll 25
The gap between the rolling guide and the plate passing guide can be adjusted simply by adjusting the gap adjusting screw 12 of the rolling material entrainment prevention plate. (The state indicated by the chain line in Figure 1).

〔Effect of the invention〕

According to the present invention, there is no need for conventional cylinders, piping, hoses, valves, etc. for moving the cylinders, and it is possible to shorten the recombination time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the central part of the roll when viewed from the operation side to the drive side in the rolling state of an embodiment of the present invention, FIG. 2 is a view taken along the nn arrow in FIG. 1, and FIG. 1 is a diagram showing the roll changing position in FIG. 1, and FIG. 4 is a diagram showing a conventional sheet passing guide mechanism. 3.3'... Upper and lower work rolls, 7, 7'... Upper and lower work roll bearing joints, 8... Rolled material entrainment prevention plate.

Claims (1)

[Claims] 1. In a threading guide installed below the pass line before and after the work rolls in a rolling mill to prevent and guide the material to be rolled, the rolling of said threading guide Rolling characterized in that the movement work to the position and the roll rearrangement position is performed using a movement mechanism such as a prevention plate installed above the pass line to prevent the rolling material from being rolled. A guide device for rolling material in a machine. 2. A material to be rolled in a rolling mill characterized in that the gap adjustment work between the sheet passing guide and the lower work roll is performed by adjusting the prevention plate etc. installed above the pass line. Threading guide device.