JPS63317209A - Rolling mill guide equipment - Google Patents

Abstract

PURPOSE:To take out a pair of horizontal rolls, upper and lower together with each chock and to reduce the roll changing time by providing chock part guides capable of vertical adjustment so that they do not protrude from each chock in the conveying direction of rolled stock. CONSTITUTION:The front ends of a pair of chock part guides, upper and lower 5A, 5B equipped on chocks 4A, 4B are supported in contact with the peripheral surfaces of the rolls of horizontal rolls 3A, 3B while the rear ends are supported so that their positions can be adjusted vertically. Therefore, when the chock part guides 5A, 5B are set on the chocks 4A, 4B, opposing guide faces 8a, 8b can be adjusted so that they run in parallel to each other. In addition the chock part guides 5A, 5B are provided in the conveying direction 2m of rolled stock so that they do not protrude from each chock 4A, 4B, and horizontal rolls 3A, 3B can be taken out easily together with the chocks 4A, 4B out of roll stands 1R, 1L.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rolling mill guide device, and more specifically, when forming steel shapes such as H-shaped steel on a mill stand, the invention guides the rolled material to the rolling rolls in a horizontal position. This invention relates to a rolling mill guide device that can be used.

[Prior art]

In rolling mills, steel shapes of various shapes, such as H-shaped steel, are formed using universal mill stands installed on rolling lines. At that time, the web part of the rolled material is rolled by a pair of upper and lower horizontal rolls, and the flange part is rolled by a pair of left and right vertical rolls.The web part of the rolled material is guided by a web guide device to feed the rolled material to the roll stand. It has become so. The position of the vertical roll that forms the flange part is always constant, so in order to keep the pass line constant, change the vertical position of the horizontal roll so that the center of the web part of the rolled material matches the pass line. There is a need. If such guidance is not possible, the height of the flange portion from the web portion will be different, resulting in an increased number of inferior products or rejected products.

Conventionally, web guide devices have been proposed for guiding a rolled material to a pass line in the correct posture. An example thereof is a web guide device for a universal rolling mill described in Japanese Patent Laid-Open No. 47-38762. In that device, one end of the web guide is supported by a rest bar;
The other end is in contact with the horizontal roll, and the rest bar is linked to move up and down in conjunction with the horizontal roll, so that the guide surface is held horizontally.

[Problem that the invention seeks to solve]

In the above-mentioned web guide device, the horizontal portions of the opposing guide surfaces are long, and each web guide is thrust from the roll stand into between the horizontal rolls, and the tip of the web guide is in contact with the horizontal roll surface.

Therefore, in order to replace the roll along with the chock according to the rolling schedule, the heavy web guide must be disassembled or retracted from the chock of the horizontal roll.
The problem is that this work requires time and effort. On the other hand, if it is necessary to dress up the rolls, horizontal rolls whose diameters have been reduced by roll grinding or the like are installed. At that time, it is necessary to adjust the web guide by moving it up and down and in the direction of conveying the rolled material so that the tip of the web guide comes into contact with the roll surface and the guide surface is horizontal. However, such an adjustment device is not provided. If not, there is a problem that the web guide is left in an inclined state, or that it requires a lot of effort to level the web guide. Therefore, if the web guide is slanted, the rolled material may not be guided smoothly, and the down time of the rolling line due to roll replacement or assembly of the web guide device will be long in a rolling line with a poor environment. There is a problem that the operating rate of the rolling line decreases. Note that the above-mentioned publication also introduces a split-type device in which the web guide is separated into the inside and outside of the chock.

Such equipment has the advantage of requiring less effort when attaching and detaching the chock from the roll stand to change rolls, but since the guide surface of the mill section guide is inclined as the chock section guide moves up and down, the rolled material is This is not preferable since it becomes difficult to guide the material to the rolling rolls correctly.

The present invention was made to solve the above-mentioned problems.
The purpose of this is to allow the web guide device to be easily disassembled and assembled to facilitate roll replacement, and to maintain the gaps formed by the respective guide surfaces parallel to each other so that their centers coincide with the pass line. It is an object of the present invention to provide a rolling mill guide device that can be used.

[Means for solving problems]

The feature of the guide device for a rolling mill of the present invention is that, as shown in FIG. , 5B are the respective chocks 4A in the direction of rolling material conveyance of 2 m.

4B without protruding from each horizontal roll 3A.
, 3B, the chock guide body 8A contacts the roll circumferential surfaces 3a, 3b at substantially opposite positions.

8B is a guide gap h larger than the roll gap h
+△h to maintain parallelism and incorporate chocks 4A and 4B into roll stands IR and IL (see Figure 2).
A pair of upper and lower mill section guides 12A and 12B can be retracted in the rolling material conveying direction 2 m, and the mill guide body 15
The tips of the chock guides 8A and 15B can freely approach and separate from the rear ends of the chock guide bodies 8A and 8B, and the opposing guide surfaces 8a and 8b
are installed so that they remain parallel.

A feature of the second invention is that in addition to the above-mentioned chock guides 5A and 5B, the roll stands IR and IL into which the chocks 4A and 4B are installed include an elevating cylinder 17.
A pair of elevating frames 13A and 1 that move up and down at A and 17B
3B, and an elevating frame 13A that can be retracted in the direction of rolling material conveyance of 2 m.

Mill part guides 12A, 12B have rest pars 14A, 14B attached to the rest pars 13B, and mill guide bodies 15A, 15B that are detachable from the rest pars 14A, 14B.
are provided, the tips of the mill guide bodies 15A, 15B are movable toward and away from the rear ends of the chock guide bodies 8A, 8B, and the opposing guide surfaces 15a, 15b are attached so as to maintain parallelism, and the rest pars 14A , 14B are raised and lowered by a pair of upper and lower lifting cylinders 17A and 17B, the lifting cylinders 17A and 17B are operated based on the amount of roll displacement by the lowering and lifting means of the horizontal rolls 3A and 3B, and the lifting cylinders 17A and 17B are attached to the lifting cylinders 17A and 17B. The amount of expansion and contraction of the lifting cylinders 17A and 17B is feedback-controlled by the displacement signals from the position detection sensors 36A and 36B (see FIG. 4).

[For production]

The tips of the pair of upper and lower chock portion guides 5A and 5B provided on the chocks 4A and 4B are supported by contacting the roll circumferential surfaces 3a and 3b of the horizontal rolls 3A and 3B, while the rear ends are position-adjustable in the vertical direction. Possibly supported. Therefore, the chock portion guides 5A, 5B are connected to the chocks 4A, 4.
When attaching to B, the opposing guide surfaces 8a and 8b can be easily adjusted to be parallel. Furthermore, the chock portion guides 5A, 5B are provided without protruding from each chock 4A, 4B in the rolling material conveyance direction 2 m, and the roll stand IR.

In 1L, the mill guides 12A and 12B are attached to a pair of upper and lower rest pars 14A and 14B whose positions can be adjusted in the vertical direction and which can be retracted in the rolled material conveying direction 2 m, so that the mill guide main body 15A, The tip of 15B can be separated from the rear ends of the chock guide bodies 8A and 8B, and forms a horizontal roll 3A.

Easily chock 3B Roll stand I for 4A and 4B
It can be extracted from R and IL. On the other hand, when the restopers 14A and 14B advance, the mill guide body 15A,
The tip of the chock guide body 15B presses the rear ends of the chock guide bodies 8A and 8B to integrate them, so that the opposing guide surface 1
5a and 15b maintain parallelism and roll stand IR,
An integrated guide is formed from the IL to below the horizontal rolls 3A and 3B.

In the second invention, the pair of upper and lower lifting cylinders 17A, 17B expand and contract in accordance with the amount of roll displacement generated when the horizontal rolls 3A, 3B are rolled down or rolled up by the rolling down/lifting means, and the rest par 14A.

When the position of the cylinder 14B is adjusted by raising and lowering, the displacement signal from the position detection sensors 36A and 36B causes the lift cylinder 17A to move up and down.
, 17B are feedback-controlled, and the mill guide body 1
5A and 15B are always considered to be the optimum guide gaps.

〔Effect of the invention〕

In the rolling mill guide device of the present invention, a chock part guide whose position is adjustable in the vertical direction is provided on each chock of a pair of upper and lower horizontal rolls without protruding from each chock in the rolling material conveyance direction, and each horizontal roll The chock guide body that contacts the roll circumferential surface at a position substantially opposite to the chock guide body maintains parallelism with a guide gap larger than the roll gap. In addition, the roll stand in which the chock is installed has a pair of upper and lower mill part guides that can be retracted in the rolling material conveyance direction, and the tip of the mill guide body can freely approach and separate from the rear end of the chock guide body, and the opposite Since the guide surfaces are installed so that they remain parallel, when changing rolls according to the rolling schedule, the mill guide can be easily retracted or even easily disassembled and replaced, while the chock guide can be easily disassembled and replaced. It is integrated with the chock and can be taken out together with the horizontal roll. As a result, processing such as grinding of the taken-out horizontal roll and adjustment of the degree of the chock guide can be efficiently performed using a separate dedicated roll shim. Furthermore, when attaching a roll whose diameter has been reduced by grinding, the tip of the chock guide body can be supported in contact with the circumferential surface of the roll to ensure a desired guide gap and provide parallel guide surfaces. The guide, which has a long horizontal portion, allows the rolled material to be guided in a convenient position where the center line of the web portion and the pass line are aligned.
H-shaped steel having accurate dimensions and shape can be efficiently manufactured on a rolling line. The above-mentioned roll replacement work is quick and labor-saving in a rolling line with a poor environment, and can shorten the downtime of the rolling line.

In the second invention, the roll stand includes a pair of elevating frames that are moved up and down by elevating cylinders, a rest bar that is attached to the elevating frame so that it can be retracted in the direction of conveying the rolled material, and a mill guide that is detachable from the rest bar. A mill part guide having a main body is provided, and when the rest bar is raised and lowered by a pair of upper and lower lifting cylinders, the lifting cylinders are operated based on the amount of roll displacement by the horizontal roll rolling down means, and the lifting cylinders are attached to the lifting cylinders. Since the amount of expansion and contraction of the lifting cylinder is feedback-controlled by the displacement signal from the position detection sensor, in addition to the effect of the first invention described above, the gap adjustment of the mill guide body can be quickly adjusted according to the amount of displacement of the horizontal roll. And the position can be controlled accurately.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments with reference to the drawings.

FIG. 2 is a main part diagram of the rolling mill 1 including the rolling mill guide device of the present invention, in which a pair of upper and lower horizontal rolls 3A, 3 for rolling the web portion 2a of the rolled material 2 are provided in the roll stands IR, IL.
B is installed as shown in FIG. The horizontal rolls 3A, 3B are rotatably supported by a pair of upper and lower chocks 4A, 4B, and the roll gap h in the horizontal rolls 3A, 3B is determined by a lowering/pressing means (not shown) attached to the tops of the roll stands IR, IL. , chock 4A
, 4B. That is, horizontal roll 3A
, 3B are arranged at vertical positions symmetrical to the pass line 1m.

Each chock 4A, 4B of the horizontal rolls 3A, 3B is provided with a chock part guide 5A, 5B whose position can be adjusted in the vertical direction without protruding from each chock 4A, 4B in the rolled material conveyance direction 2 m. That is, at four locations inside the upper chock 4A (the two locations on the left and right are not shown), mounting members 7A are provided into which the fixing portion 6A of the chock portion guide 5A is vertically adjustable. The chock portion guide 5A includes a fixed portion 6A, a chock guide main body 8A having a flat guide surface 8a, a bracket 9A integrated therewith via a pin shaft 6a, and a spring connecting the chock guide main body 8A and the fixed member 6A. It consists of 10. A plurality of shims IIA for adjusting the position of the chock guide body 8A in the vertical direction are interposed on the upper part of the mounting member 7A into which the fixing portion 6A is inserted and fixed. In addition, the above-mentioned spring 1O uses its elastic force to move the tip of the chock guide body 8A to the horizontal roll 3.
The guide surface 8a is brought into contact with the roll circumferential surface 3a of A, and the horizontality of the guide surface 8a is ensured.

On the other hand, mounting members 7B are also provided at four locations in the front and back inside the lower chock 4B, into which the fixing portion 6B of the chock portion guide 5B is vertically inserted so as to be adjustable. The chock portion guide 5B consists of a bracket 9B attached via a pin shaft 6b to a narrow guide body 8B having a fixed portion 6B1 and a guide surface 8b. A shim IIB for adjusting the position of the chock guide main body 8B in the vertical direction is interposed on the lower surface of the fixing part 6B in the mounting member 7B. Sim II
The tip of the tick guide main body 8B whose position has been adjusted by B comes into contact with the roll peripheral surface 3b of the horizontal roll 2B, and the horizontality of the guide surface 8b is ensured.

The guide gap formed by the two guide surfaces 8a and 8b maintains parallelism with a guide gap h+Δh larger than the roll gap h described above.

Note that the chock guide bodies 8A are vertically opposed.

8B is a mill guide main body 15A, 15B, which will be described later.
The chock portion guides 5A and 5B provided for the purpose of forming a guide for guiding the rolled material 2 are positioned so that they do not interfere when the chocks 4A and 4B are pulled out from the roll stands IR and IL. Therefore, if the mill section guides 12A and 12B, which will be described later, are retreated, the horizontal rolls 3A and 3B will immediately move to the chock section guide 5.
A.

It can be replaced with chocks 4A and 4B together with chocks 5B. Incidentally, in this example, since reverse rolling is possible, the chock guides 5A, 5
B is provided at the front and rear positions as mentioned above.

A pair of upper and lower mill guides 12A and 12B that can be retracted in the rolling material conveyance direction 2 m are provided on the upstream and downstream sides of the pair of left and right roll stands IR and IL. It includes lifting frames 13A and 13B that can be raised and lowered, rest pars 14A and 14B that are attached to the lifting frames 13A and 13B and that can be retracted in the rolling material conveying direction 2 m, and a mill guide main body 15A that is attached to the lifting frames 13A and 13B so that film can be deposited thereon.

15B, guide rods 16R and 16L (see FIG. 2) that guide the elevation of the elevation frames 13A and 13B, elevation cylinders 17A and 17B, and retract cylinder 18.
A, 18B.

As shown in FIG. 2, a pair of left and right guide rods 16R,
16L is held by three holding members 19R and 19L each fixed to the front surfaces of the roll stands IR and IL with bolts, etc., and is the roll stand IR.

It is considered to be integrated with IL. The guide rod 16R,1
Guide holes 13a formed at four left, right, upper and lower ends of the lifting frames 13A and 13B are slidably fitted into the 6L, so that the lifting frames 13A and 13B are guided by guide rods 16R and 16L. It has become. Also,
The center part of the upper surface of the lifting frame 13A and the lifting frame 1
The tips of the piston rods of the lifting cylinders 17A and 17B are connected to the center of the lower surface of the cylinder 3B. On the other hand, the base of the lifting cylinder 17B is swingably attached via a pin shaft 20a to a beam member 20 (see FIG. 1) that connects the left and right roll stands IR and IL. Further, the base portion (not shown) of the lifting cylinder 17A is similarly attached to be swingable. Therefore, the lifting frames 13A, 13B
By the expansion and contraction of the lifting cylinders 17A and 17B, the lifting frames 13A and 13B operate in opposite directions with the pass line 1m as a boundary.

As shown in FIG. 3, the front surface 13b of the elevating frame 13A
is provided with two protruding guide members 13c, and furthermore, on each opposing inner surface of the guide members 13c,
A pair of upper and lower guide rails 21 are attached. And, this guide rail 21 has a rest par 1.
A flanged sliding body 22 (see Fig. 2) is fitted into both ends of the retract cylinder 18A to guide the movement of the rest par 14A when it retreats or advances in the rolled material conveying direction 2 m due to the expansion and contraction of the retract cylinder 18A. It has become. As shown in FIG. 2, the lifting frame 13B is also provided with two guide members 13c, and a guide rail 21 is provided thereon.
is installed.

The rest par 14B can also be moved forward or backward via the sliding body 22, similarly to the above-described rest par 14A.

As shown in FIG. 1, two retract cylinders 18A and 18B (see FIG. 3) are each attached to the rear surface 13d of the lifting frames 13A and 13B, and a rest par 14A is connected to the tip of the piston rond. , 14B are expanded and contracted by the retract cylinders 18A and 18B,
Can move horizontally. For example, when the retract cylinders 18A, 18B are retracted, the mill guide bodies 15A, 15B press the rear ends of the chock guide bodies 8A, 8B. By this pressing, the horizontal portion of the guide for guiding the rolled material 2 is formed to be long.

When the retract cylinders 18A, 18B are extended, the mill guide bodies 15A, 15B are moved to the chock guide body 8A,
Separated from 8B and completely roll stand IR, IL
When retracted outward, horizontal rolls 3A and 3B can be pulled out for roll replacement.

As shown in FIG. 2, the center portions of the rest pars 14A, 14B are formed into small diameter shafts with steps, and the center portions are located at the upper position of the mill guide main body 15A, and are arranged in the direction of rolling material conveyance.
A semicircular recess 23A (see FIG. 1) shown by a two-dot chain line that opens at the angle m and a lower part of the mill guide main body 15B are fitted with a semicircular recess 23B that opens downward. Therefore, the mill guide bodies 15A, 15B are engaged with the small-diameter shaft portion in the central portion and do not move in the left-right direction of the rest pars 14A, 14B. A movement prevention ring 24 that comes into contact with both side surfaces of the mill guide main body 15A is fitted into the shaft portion, and a recess is formed on the inner surface of the movement prevention ring 24.
The convex portion of the mill guide main body 15A is fitted into the semicircular concave portion 23A, and the two are integrated. therefore,
The movement prevention ring 24 and the mill guide main body 15A are
The retract cylinder 18 is integrated by the above-mentioned concave and convex engagement.
When the rest par 14A moves due to the expansion and contraction of A, the mill guide main body 15A can also move. Note that a fixing member 25 is inserted between the sliding body 22 and the movement prevention ring 24 to prevent the movement prevention ring 24 from moving. On the other hand, the semicircular recess 23B of the mill guide main body 15B is
Since it is fitted into the center of the rest par 14B from above, the mill guide main body 15B can be moved in the rolled material conveying direction 2 m by the movement of the rest par 14B even without the above-mentioned movement prevention ring 24 or fixing member 25. .

As shown in FIG. 1, flat guide surfaces 15a and 15b are formed at the bottom of the mill guide body 15A and at the top of the mill guide body 15B, respectively. and,
The guide gap formed by the opposing guide surfaces 15a and 15b is made parallel by the hook 28 and the support base 35 as described later, and the chock guide bodies 8A and 8
Similar to the guide gap in B, it is set to h+Δh. Incidentally, tapered protrusions 26A, 26B are formed at the tips of the mill guide bodies 15A, 15B, and are shaped to be suitable for coming into contact with and separating from the chock guide bodies 8A, 8B.

As shown in FIG. 1, the rear surface 13d of the elevating frame 13A
A pneumatic cylinder 27 is provided via a pin shaft 27a, and an inverted-shaped hook 28 is attached to the tip of the piston loft via a pin shaft or the like. A pin 29a is attached to this hook 28.

29b is provided in a protruding manner, and links 30A and 30B are attached to the pins 29a and 29b. Lifting frame 1
The support member 31 fixed to the rear surface 13d of 3A has pins 32a and 32b protruding from it, and the above-mentioned link 30A is attached to the pins 32a and 32b.

The other end of 30B is attached. These form a parallelogram link mechanism 33, and by the expansion and contraction of the pneumatic cylinder 27, the hook 28 moves up and down while maintaining a constant posture.
The receiving surface 28a is always horizontal. A pin 34 is provided protruding from the side surface of the elevating frame 13A, and the pneumatic cylinder 27
When the pin 34 is contracted and the hook 28 rises from the position shown by the two-dot chain line to the position shown by the solid line, the pin 34 is supported by the receiving surface 28a of the hook 28. By supporting the pin 34 on the hook 28, the mill guide main body 15A is attached to the rest par 1.
It is supported at two points: 4A and hook 28.

Therefore, even if the rest par 14A is retracted, the mill guide main body 15A is always held in a horizontal position. Note that when the hook 28 is lowered, it is possible to facilitate operations such as replacing the mill guide main body 15A. On the other hand, the lifting frame 13B has a support stand 3.
5 is attached so that the posture of the mill guide main body 15B is always horizontal.

As shown in FIG. 4, the lifting cylinders 17A and 17B that adjust the vertical position of the mill guide bodies 15A and 15B together with the lifting frames 13A and 13B shown in FIG. A position detection sensor 36A that detects.

36B is built-in. This is horizontal roll 3A, 3
When the lifting cylinders 17A, 17B operate based on the amount of roll displacement by the rice rolling means B, the position detection sensor 36A attached to the lifting cylinders 17A, 17B
, 36B, the lifting cylinder 17A,
The amount of expansion and contraction of 17B is controlled by feedback. The position detection sensors 36A and 36B send their displacement signals to the controller 37, and the controller 37
For example, the horizontal roll 3A is configured to exchange signals with a sequencer 38 in which various data such as roll gap change data of the horizontal rolls 3A and 3B are stored depending on the rolling schedule.

When 3B is pressed down or raised, the signal is input to the solenoid valve 39 via the sequencer 38 and controller 37. The hydraulic pump 40 is activated by the operation of the solenoid valve 39.
hydraulic oil is introduced into the lifting cylinders 17A, 17B, and the mill guide bodies 15A, 15B
The position is adjusted by expanding and contracting A and 17B.

FIG. 5 shows a lifting cylinder 17A having different hydraulic circuits,
17B is a hydraulic control circuit. In this case, a proportional control solenoid valve 41 is used in place of the solenoid valve 39 in the above-described hydraulic control circuit shown in FIG. Furthermore, an amplifier 42 for signal amplification is interposed between the controller 37 and the proportional control solenoid valve 41, so that the positions of the mill guide bodies 15A, 15B can be adjusted in the vertical direction with high precision.

The guide device of the rolling mill having such a configuration can guide the web portion 2a such as H-shaped steel of the rolled material 2 in the following manner, and can also install and remove the horizontal rolls 3A and 3B. Chock 4A.

It's easy to do every 4B.

The rolled material 2 shown in FIG. 2 is conveyed by a roller table (not shown), and the web portion 2a of the rolled material 2 is connected to the mill guide bodies 15A, 15B and the chock guide, which are adjusted to the guide gap h+Δh by feedback control. Main body 8A,
8B and rolled by horizontal rolls 3A and 3B held in a roll gap h. The center line of the web portion 2a is guided along the pass line 1m in the rolling material conveying direction 2m, and the rolling material 2 is rolled while maintaining a correct posture.

After the H-shaped steel is produced from the beam blank in this way, the next H-shaped steel of different dimensions is produced depending on the rolling schedule.
The shaped steel is rolled. At that time, the horizontal rolls 3A, 3B are replaced, and if the dimensions of the newly produced H-shaped steel are significantly different, the mill guide bodies 15A, 15B are also replaced at the same time. On the other hand, if the dimensional difference between the H-shaped steels is small, the conventional mill guide bodies 15A and 15B will be used.
The roll exchange at that time is performed as follows.

First, retract the mill guides 12A and 12B,
Mill guide bodies 15A, 15B and chock guide body 8
A, 8B are separated, and the chock guide bodies 8A, 8 are separated.
While leaving B on chocks 4A and 4B, horizontal roll 3A,
Pull out 3B along with chock 4A and 4B. Chock part guide 5A.

5B does not interfere with the stand frames IR and IL, and the work can proceed smoothly. Note that when installing a new roll, the procedure can be reversed.

Incidentally, if either of the horizontal rolls 3A and 3B is to be dressed up, the large-diameter horizontal roll 3B shown by the solid line in FIG. 6 is ground and becomes the small-diameter one shown by the dashed-dotted line. The roll attached to the chock 4B is rolled up to a predetermined roll gap with respect to the pass line 1m.

In order to adjust the position of the chock portion guide 5B accordingly, a shim IIB having a predetermined thickness is interposed between the mounting member 7B and the fixing portion 6B shown in FIG. 1, so that the guide surface 8b is made horizontal. At this time, the chock guide main body 8B will be displaced as shown by the dashed line with respect to the horizontal roll 3B whose diameter has been reduced, but if it is necessary to keep it at the position shown by the solid line, use an intervention such as shim IIB. Just change the amount,
Since such installation and adjustment can be carried out in a place with a good working environment, all the chock guides 5B17) can be adjusted smoothly and accurately, and the rolls can also be replaced quickly on the rolling line.

[Brief explanation of drawings]

Fig. 1 is a main part diagram of a rolling mill including a guide device of the rolling mill of the present invention, Fig. 2 is a view taken along the line u-n in Fig. 1, and Fig.
4 and 5 are examples of the hydraulic circuit, and FIG. 6 is a diagram showing the relationship between the tip of the chock guide body and the roll circumferential surface of the horizontal roll. 1m--Pass line, IR, IL--Roll stand, 3A, 3B-Horizontal roll, 3a, 3b-O-Round surface,
4A, 4B-Chock, 5A, 5B-・Thousand day part guide, 8A, 8B-Chock guide body, 8a, 8b・-
Guide surface, 12A, 12B-mill section guide, 13A, 1
3B -- Lifting frame, 14A, 14B -- Rest bar, 15A, 15B -- Mill guide body, 15a, 15
b-Guide surface, 17A, 17B-m-Lifting cylinder, 3
6A, 36B--position detection sensor, h-roll gap, h+Δh...-guide gap. 3rd figure 2A

Claims (2)

[Claims] (1) Each chock of a pair of upper and lower horizontal rolls is provided with a chock part guide whose position can be adjusted in the vertical direction without protruding from each chock in the rolling material conveyance direction, and the roll circumference at the almost opposing position of each horizontal roll is provided. The chock guide main body that contacts the surface maintains parallelism with a guide gap larger than the roll gap, and the roll stand incorporating the chock has a pair of upper and lower mill part guides that can be retracted in the direction of conveying the rolled material. A rolling mill guide device, characterized in that the tip of the mill guide main body can freely approach and separate from the rear end of the chock guide main body, and is attached so that the opposing guide surfaces are maintained parallel. (2) Each chock of the pair of upper and lower horizontal rolls is provided with a chock part guide whose position can be adjusted in the vertical direction without protruding from each chock in the rolling material conveyance direction, and the roll circumference at the almost opposing position of each horizontal roll is provided. The chock guide body that contacts the surface maintains parallelism with a guide gap larger than the roll gap, and the roll stand incorporating the chock has a pair of elevating frames that move up and down with elevating cylinders, and a retractable frame that moves up and down in the direction of the pass line. A mill part guide is provided which has a rest bar that is attached to the elevating frame and a mill guide body that is detachably attached to the rest bar, and the tip of the mill guide body can freely approach and separate from the rear end of the chock guide body. and are attached so that their opposing guide surfaces remain parallel, and when the rest bar is raised and lowered by a pair of upper and lower lifting cylinders, the lifting cylinders are operated based on the amount of roll displacement by the horizontal roll rolling down and lifting means, A rolling mill guide device characterized in that the amount of expansion and contraction of the lifting cylinder is feedback-controlled by a displacement signal from a position detection sensor attached to the lifting cylinder.