JP5250833B2 - Inter-mill trough in strip rolling - Google Patents

Description

  The present invention relates to a trough between mills in rolling steel bars incorporated in equipment for rolling steel bars such as bar steel and flat steel.

In the recent hot rolling of long steel bars, rolling of various sizes such as round bar, square bar and flat bar is performed at one factory. During rolling, the rolling roll is replaced for each size of the rolling material (passing material), and the rolling material induction device installed at the entrance (upstream side port) or the exit (downstream side port) of the rolling roll of the rolling mill is replaced. However, the inter-mill trough that is installed between rolling mills and serves as a guide passage for the passing material is prepared for the passing material, and is replaced with a compatible one or without replacing it. By changing the position of the mounting holes of the side guide fixing bolts attached to the, the size can be changed.
In order to make it easily adaptable to changes in the size of the passing material, for example, in the side guide control device described in JP-A-1-317614, the opposing guide plate is expanded and contracted in the width direction by expanding and contracting the cylinder rod. By reciprocating, the width of the passing material can be accommodated.
JP-A-1-317614

According to the technique described in Japanese Patent Laid-Open No. 1-317614, the amount of hydraulic pressure is used to adjust the distance between the guide plates. However, according to the experience of the applicant, the stopping accuracy of the guide plates is actually good. In order to achieve stable rolling, further improvements are necessary. Further, in the conventional example including the technique, the installation position of the rolling roll is changed with respect to the trough between the mills in order to adapt to the change in the thickness (length in the vertical direction) of the passing material that is the size change.
However, changing the position of the rolling roll has a problem that it takes time and effort (increase in work load) in the size changing operation.
An object of the present invention is to enable stable rolling and to reduce and speed up the load of resizing work.

The first feature of the present invention is a gantry, a gantry height adjusting mechanism that adjusts the height of the gantry, a trough body disposed on the gantry, and a trough body provided on the trough body to guide a passage material. A side guide having a side guide plate and a side guide interval adjusting mechanism for adjusting a gap between the side guide plates, and the trough body is capable of moving up and down via the gantry. . The gantry includes a cylindrical fixed base that is concentric with each other, and a movable base that is housed and supported so as to be movable up and down in the fixed base, and the movable base is a bearing having a shaft hole in a shaft center portion. The trough body can be supported via a support plate attached to the upper end portion and the bottom portion of the trough body can be pushed up. An elevating screw shaft disposed at the shaft center and provided integrally with the movable base; and a transmission shaft that is connected to the elevating screw shaft on one side and to which the driving force from the driving source is transmitted on the other side. The lifting screw shaft is housed in the shaft hole of the bearing portion of the movable base.
A second feature of the present invention includes the first feature described above, and the side guide interval adjusting mechanism includes a first drive transmission mechanism that transmits a driving force from a drive motor that is a drive source, and the first drive transmission mechanism. A second drive transmission mechanism that is linked to the drive transmission mechanism, a third drive transmission mechanism that is linked to the second drive transmission mechanism, and the upstream and downstream sides of the trough body and the width direction of the side guide. And a spacing adjusting screw shaft that is arranged in an opposing positional relationship and that is capable of transmitting a driving force from the third driving transmission mechanism and is movable in the axial direction. The shaft is connected to the side guide plate and can be adjusted between the opposing side guide plates .
A third feature of the present invention includes the second feature described above , and is disposed on the upstream side and the downstream side of the trough body, and is provided with a slide shaft facing the width direction of the trough body, Each slide shaft is connected to the side guide plate .
A fourth feature of the present invention includes any one of the first to third features described above, and a descaling device is disposed at an end of the trough body. The descaling device includes a descaling pipe, , an injection nozzle provided for the descaling pipe, and a connecting member which connects the side guide plates, the connecting member is in Rukoto attached to descaling pipe.

  According to the present invention, the side guide interval adjusting mechanism can adjust the distance between the side guides to correspond to the width of the passing material with high accuracy, enabling stable rolling, and the trough body can be adjusted in height by the gantry. Since this is possible, it is possible to reduce the load of resizing work and speed it up.

  1 to 4, the inter-mill trough according to the present invention includes a gantry 1, a gantry height adjusting mechanism 2 for adjusting the height of the gantry, a trough body 3 disposed on the gantry, and the trough body. A side guide 4 having a side guide plate 5 for guiding the passing material, a side guide interval adjusting mechanism 6 for adjusting the distance between the opposing side guide plates, and an inlet side end of the trough body And a descaling device 7 provided at the (upstream side port).

The trough base 1 will be described.
As shown in FIGS. 3 to 5, the gantry 1 includes a round cylindrical fixed base 8 and a movable base 9 inserted in the fixed base so as to be movable up and down (movable up and down).
The fixing base 8 is fixed on the base frame 10 with bolts as shown in FIGS. The movable table 9 is adjusted in elevation level by the gantry height adjustment mechanism 2. The movable base 9 is provided with a bearing portion 9a having a shaft hole at its axial center. A support plate 11 is horizontally attached to the upper end of the movable base 9. The movable table 9 supports the trough body 3 on the support plate 11. Positioning pins 11 a protrude from the four corners of the support plate 11. Each positioning pin 11a penetrates the plate 12 fixed to the lower part of the lower support frame 26 described later.

The gantry height adjustment mechanism 2 will be described with reference to FIG.
An elevating screw shaft 13 is accommodated in the vertical direction in the shaft hole of the bearing portion 9a of the axial center portion of the movable base 9. The elevating screw shaft 13 is supported in the bearing portion 9a, the lower side extends into the fixed base 8, passes through a detent 14 provided at the lower portion of the fixed base, and the lower end is an elevating gear. Box 15 has been reached. The elevating gear box 15 is attached to the bottom of the fixed base 8, and this elevating gear box is located in the base frame 10.
The male screw portion 13 a at the lower portion of the lifting screw shaft 13 is engaged with the female screw portion of the axial center of the worm wheel 16 provided in the lifting gear box 15. The worm wheel 16 meshes with the worm 17 in the gantry transmission mechanism 18 (FIG. 6) constituting a part of the gantry height adjustment mechanism 2.

The gantry transmission mechanism 18 will be described with reference to FIG.
A cylindrical case 19 and a box 20 are provided in the elevating gear box 15. A transmission shaft 21 is supported in the case 19 so as to be horizontal and rotatable. One end portion (right end portion in the figure) of the transmission shaft 21 is exposed outward from the case 19, and a worm 17 is attached to the one end portion. The other end portion (left end portion in the figure) of the transmission shaft 21 is exposed from the case 19 and protrudes into the box 20, and a first transmission gear 22 is attached to the other end portion.
The drive shaft 23 is erected in a direction perpendicular to the transmission shaft on the other side (left side in the figure) and positioned above the transmission shaft 21. The drive shaft 23 communicates with a drive source at one end (upper end in the figure) and can be driven to rotate manually or automatically (manually in the illustrated example). The other end side (the lower end side in the figure) of the drive shaft 23 is rotatably supported by a bearing 24 fixed on the box 20. A second transmission gear 25 is attached to the other end of the drive shaft 23 located in the box 20. The second transmission gear 25 meshes with the first transmission gear 22.

The interlocking relationship between the gantry 1 and the gantry height adjusting mechanism 2 will be described.
In FIG. 6, when the drive shaft 23 of the gantry transmission mechanism 18 is manually driven to rotate, the rotational force is transmitted to the transmission shaft 21 via the first and second transmission gears 22, 25. The worm wheel 16 (FIG. 5) that rotates and meshes with the worm rotates, and the elevating screw shaft 13 moves up and down through this rotation.
In FIG. 5, when the lifting screw shaft 13 moves up and down, the movable table 9 moves up and down in the fixed table 8, and as a result, the trough body 3 (FIG. 4) is moved up and down. By adjusting the height of the gantry 1, the level of raising and lowering the trough body 3 can be adjusted.

The trough body 3 will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the trough body 3 includes a lower support frame 26, an upper support frame 27 fixed on the lower support frame, and upstream and downstream sides, that is, both front and rear sides on the upper support frame. And a bottom plate 29 supported via a shaft 28 arranged on both the left and right sides in FIG. The side guide 4 is disposed on the bottom plate 29.

The side guide 4 will be described with reference to FIGS.
The side guide 4 includes a pair of side guide plates 5 that are long and face each other from the upstream side (the right side in FIG. 1) to the downstream side. Both the side guide plates 5 can approach or retract from each other, and the distance between the side guide plates is adjusted through the side guide interval adjusting mechanism 6, that is, the interval between the side guides is adjusted. It is the entrance guide plate 5a which the entrance side (right side of FIG. 2) of both the side guide plates 5 spreads in a bell mouth shape.
Although not shown, the strip rolled by the rolling roll of the rolling mill is guided into the side guide 4 of the trough body 3 by the inlet side induction device and guided to the rolling roll of the next rolling mill through the outlet side induction device. The

The side guide interval adjusting mechanism 6 will be described with reference to FIGS. 3 and 4 and FIGS.
As shown in FIGS. 7 and 8, the side guide interval adjusting mechanism 6 includes a first drive transmission mechanism 6 </ b> A that transmits the driving force of the drive motor 30 (FIGS. 3 and 4) serving as a drive source to the side guide 4, and A second drive transmission mechanism 6B interlocked with the first drive transmission mechanism and a third drive transmission mechanism 6C interlocked with the second drive transmission mechanism are provided.
As shown in FIGS. 3 and 4, the drive motor 30 is attached to the lower surface of the lower support frame 26. For example, a servo motor is used as the drive motor 30. The output shaft of the drive motor 30 protrudes toward the downstream side (the left side in the figure), and the input shaft 31 is connected to the output shaft.
In the first drive transmission mechanism 6 </ b> A shown in FIG. 7, the front end portion (front end portion) of the input shaft 31 is rotatably supported by the central gear box 32, and the first drive transmission gear 33 is provided at the most distal portion. Is attached. As shown in FIGS. 3 and 7, a predetermined distance is provided between the front side portion and the downstream side of the lower support frame 26 across the central gear box 32 and on both sides in the width direction (left and right sides in FIG. 7). Lower gear boxes 36 and 37 are provided, and first transmission shafts 34 and 35 are arranged between the central gear box and the lower gear box, respectively. 79.
The inner ends of the first transmission shafts 34 and 35 are rotatably supported by the central gear box 32 and the outer ends are rotatably supported by the lower gear boxes 36 and 37 of the front side. Second drive transmission gears 38 and 39 are attached to inner ends of the first transmission shafts 34 and 35 facing each other, and each second drive transmission gear is connected to the first drive transmission gear 33. Are engaged. Third drive transmission gears 40 and 41 are attached to the outer ends of the first transmission shafts 34 and 35, respectively.

  In the second drive transmission mechanism 6B shown in FIGS. 7 and 8, pipe-like cases 42 and 43 are erected on the lower gear boxes 36 and 37 of the front side portions. The lower ends of the cases 42 and 43 are fixed to the upper surfaces of the lower gear boxes 36 and 37 of the front side, and the upper ends are fixed to the lower portion of the upper support frame 27, respectively. Second transmission shafts 44 and 45 are inserted into the cases 42 and 43, and the lower ends of the second transmission shafts protrude into the lower gear boxes 36 and 37 of the front side portion. Fourth drive transmission gears 46 and 47 are attached to the lower end portions of the second transmission shafts 44 and 45, and fifth drive transmission gears 48 and 49 are attached to the upper end portions. The fourth drive transmission gears 46 and 47 are meshed with the third drive transmission gears 40 and 41 in the lower gear boxes 36 and 37 of the front side portions.

In the third drive transmission mechanism 6C shown in FIG. 8, the upper gear box 50 is attached to the upper support frame 27 (FIG. 7) on the downstream side (left side in FIG. 9) and on the upper and lower sides in FIG. The upper gear box 50 in the front side portion is disposed to face the lower gear boxes 36 and 37 (FIG. 7) in the front side portion in the vertical direction. Further, as shown in FIG. 8, upper end portions of the second transmission shafts 44 and 45 (only the second transmission shaft 44 is shown in FIG. 8) project into the upper gear box 50 of the front side portion. .
3, 8, and 9, the upper gear box 51 of the rear side is attached to the upper support frame 27 on the right side (upstream side) of FIG. 9 so as to face the upper gear box 50 of the front side.
As shown in FIG. 8, a connecting shaft (only one connecting shaft 52 is shown) is passed between the upper gear boxes 50, 51 on both front and rear sides, and both front and rear ends of each connecting shaft can rotate to each upper gear box. Bearings. One side (left side in FIG. 8) of the connecting shaft 52 is constituted by an extension bar 52a, and the other side is constituted by a universal joint 52b, and worm shafts 53, 54 are connected to both end portions.
As shown in FIG. 8, a sixth drive transmission gear 55 is attached to the front end portion of the worm shaft 53 on the front side in the upper gear box 50 of the front side portion, and this sixth drive transmission gear is the fifth drive gear. It meshes with the transmission gear 48. Also, worms 56 and 57 are attached to the worm shafts 53 and 54 in the upper gear boxes 50 and 51 on both the front and rear sides. The worm wheel 60 attached to the space adjustment screw shaft 58 is engaged with the front worm 56, and the worm wheel 61 attached to the space adjustment screw shaft 59 is engaged with the rear worm 57.

As shown in FIG. 9, the inner end portions (tip portions) of the distance adjusting screw shafts 58, 59 on both the front and rear sides are connected to the outer surface of the side guide plate 5. The distance adjusting screw shafts 58 and 59 are moved in the axial direction (vertical direction) in FIG. 9 by the rotation of the worm wheels 60 and 61, and the side guide plates 5 facing each other are moved closer to or away from each other. Is done.
The distance adjusting screw shafts 58 and 59 on both the front and rear sides are covered with a screw cover 62 and a sleeve 63 at portions protruding from the upper gear boxes 50 and 51 on both the front and rear sides.
Slide shafts 64 and 65, which are balance pins, are disposed adjacent to the distance adjusting screw shafts 58 and 59 on both the front and rear sides. The slide shafts 64 and 65 are movably accommodated in sleeve-shaped guides 66 and 67, respectively. The guides 66 and 67 are fixed to brackets 68 and 69 attached to the upper support frame 27. The front ends of the slide shafts 64 and 65 are connected to the outer surface of the side guide plate 5. The slide shafts 64 and 65 serve to stabilize the movement of the side guide plate 5.

The interlocking relationship among the drive motor 30, the first, second, and third drive transmission mechanisms 6A, 6B, and 6C, and the distance adjusting screw shafts 58 and 59 will be described.
The driving force of the drive motor 30 is transmitted from the input shaft 31 to the connecting shaft 52 through the first transmission shafts 34 and 35 and the second transmission shafts 44 and 45 as shown in FIG. The meshing worm wheels 60 and 61 rotate, and the distance adjusting screw shafts 58 and 59 on both sides move in the axial direction along with the rotation.

The descaling device 7 will be described with reference to FIGS. 1, 2, 10, and 11.
In the example shown in FIG. 1, the descaling device 7 is disposed on the inlet side (upstream port side) of the trough body 3. As shown in FIG. 10, the descaling device 7 includes a cover casing 71, descaling pipes 72 and 73 piped in the cover casing, and injection nozzles 74 and 75 provided at the tips of the descaling pipes. And a connecting member 76 attached to the descaling pipe. Of the descaling pipes 72 and 73, one descaling pipe 72 is disposed opposite to the left and right sides as shown in FIG. 10, and the other descaling pipe 73 is disposed opposite to the upper and lower sides. The descaling pipes 72 and 73 are piped so as to surround the passing material S that enters. Connection members 76 are attached to the descaling pipes 72 on the left and right sides of FIG. 10, and each connection member is connected and fixed to a holding plate 77 held on the side guide plate 5 of the side guide 4 by bolts.
For this reason, when the rolling object is changed from the passing material S shown in FIG. 10 to the passing material S1 shown in FIG. 11, the passing material S1 is thinner than the passing material S or has a reduced shape. In addition, the side guide plate 5 needs to narrow the distance between the side guide plates from the position shown in FIG. 10, for example, as shown in FIG. The descaling pipes 72 on the left and right sides are linked with the change of the side guide plate 5 so that the facing distance is narrowed, and the removal of dirt and the like adhering to the passage material S1 by the spray water from the spray nozzle 74 is ensured. Yes.

The usage method of the trough between mills concerning this invention is demonstrated with reference to FIGS.
The passing material S (FIG. 10) is transferred from the entrance side of the trough body 3 into the side guide 4 as shown in FIG. 1, and is guided between the side guide plates 5 from the upstream side to the downstream side (left side in FIG. 1). Although not shown, it is rolled by a rolling roll of a rolling mill through an induction device.
Since the passing material S is sprayed by the spray nozzles 74 and 75 (FIG. 10) of the descaling device 7 on the inlet side of the trough body 3, dirt and the like adhering to the outer periphery is removed.
In order to correspond to the width of the passage material S, the distance between the side guide plates 5 of the side guide 4 is changed using the side guide distance adjusting mechanism 6 to adjust the distance between the side guides.
An operation for adjusting the distance between the side guides 4 will be described.
When the drive motor 30 is driven, the driving force is transmitted to the distance adjusting screw shafts 58 and 59 via the first, second and third drive transmission mechanisms 6A, 6B and 6C. By moving in the center direction, the side guide plates 5 approach or separate from each other, the distance between the opposing surfaces is changed, and the distance between the side guides 4 is adjusted by controlling the drive of the drive motor.

A corresponding method when the rolled material is changed from the passing material S shown in FIG. 10 to the passing material S1 shown in FIG. 11 will be described.
In this case, since the passage material S1 is thinner than the passage material S (the shape is reduced), it is necessary to adjust the height of the trough body 3 as the first stage. As a step, it is necessary to adjust the distance between the side guides 4 to narrow the distance between the side guide plates 5.
First, height adjustment work will be described.
When the drive shaft 23 (FIG. 6) is manually rotated, the rotational force is transmitted to the lifting screw shaft 13 as shown in FIG. Accordingly, the lower support frame 26 is also moved upward, so that the side guide 4 on the trough body 3 is raised. The operator adjusts the ascent distance of the movable base 9 while adjusting the rotation of the drive shaft 23 to set the level of the trough body 3 to an optimum height.
Next, the interval adjustment work of the side guide 4 will be described.
The driving force is transmitted to the first drive transmission mechanism 6A, the second drive transmission mechanism 6B, and the third drive transmission mechanism 6C by the drive motor 30 (FIG. 3), and to the spacing adjusting screw shafts 58 and 59. Then, the distance adjusting screw shaft approaches in the opposite direction, and therefore the distance between the opposing side guide plates 5 becomes narrow. The operator adjusts the distance between the side guide plates 5 while adjusting the driving force of the drive motor 30, and sets the distance to an optimum value corresponding to the width of the passage material S1.
In the process of adjusting the distance between the side guide plates 5, the descaling pipes 72 of the descaling devices 7 on both sides of FIG. 11 attached to the side guide plates also operate in the same direction as the side guide plates. At the stage where the interval adjustment operation is completed, the injection nozzle 74 can inject the injection water at an optimum position with respect to the passage materials S and S1, as shown in FIG.
In this manner, the height of the trough body 3 is adjusted by transmitting the driving force to the lifting screw shaft 13 via the gantry transmission mechanism 18 and moving the movable platform 9 of the gantry 1 up and down.
Further, by transmitting the driving force of the drive motor 30 to the opposing distance adjusting screw shafts 58 and 59 via the first, second and third drive transmission mechanisms 6A, 6B and 6C, the axis of the distance adjusting screw shaft is obtained. The distance between the side guide plates 5 is adjusted through movement in the center direction.

According to the example shown in the drawing, the facing distance between the side guide plates 5 can maintain a suitable value with respect to the passing materials S and S1 through the central distribution by the side guide interval adjusting mechanism 6. Can be prevented.
By using a servo motor for the drive motor 30, the interval adjustment work of the side guides 4 can be accurately performed in a short time.
Since the spray nozzle 74 of the descaling device 7 is interlocked with the change in the distance between the side guide plates 5, it is possible to perform descaling with an appropriate amount and angle of the spray water.
The trough body 3 can be easily adjusted in height and can be adjusted manually at one location, which is convenient.

It is a perspective view which shows the trough between mills concerning this invention. It is an expansion perspective view which shows the trough between mills concerning this invention from the front side. It is an expansion perspective view which shows the trough between mills concerning this invention from the bottom face side. It is a front view which shows the trough between mills concerning this invention. It is an expanded sectional view which shows the mount frame in the trough between mills concerning this invention. It is an expanded sectional view which shows the transmission mechanism for mounts of the mount height adjustment mechanism in the trough between mills concerning this invention. It is an expanded sectional view showing the 1st and 2nd drive transmission mechanisms in the trough between mills concerning this invention. It is an expanded sectional view showing the 3rd drive transmission mechanism in the trough between mills concerning this invention. It is an expanded plane sectional view which shows the relationship between the side guide in the trough between mills concerning this invention, a screw shaft, and a slide shaft. It is an enlarged front view which shows the descaling apparatus in the trough between mills concerning this invention. It is an enlarged front view which shows the descaling apparatus in the trough between mills concerning this invention, Comprising: It is a figure which shows the state corresponding to the small passing material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Base height adjustment mechanism 3 Trough main body 4 Side guide 5 Side guide plate 6 Side guide space | interval adjustment mechanism 6A 1st drive transmission mechanism 6B 2nd drive transmission mechanism 6C 3rd drive transmission mechanism 7 Descaling device 8 Fixed Base 9 Movable base 9a Bearing 11 Support plate 11a Positioning pin 13 Lifting screw shaft 16 Worm wheel 17 Worm 18 Mounting mechanism 21 Transmission shaft 22 First transmission gear 23 Drive shaft 25 Second transmission gear 26 Lower support frame 27 Upper support frame 30 Drive motor 31 Input shaft 34, 35 First transmission shaft 44, 45 Second transmission shaft 52 Connection shaft 53, 54 Worm shaft 56, 57 Worm 58, 59 Space adjustment screw shaft 60, 61 Worm Wheel 64, 65 Slide shaft 72, 73 Descaling pipe 74, 75 Injection nozzle 76 Connecting member 77 Holding plate S, S1 Passing material

Claims (4)

A gantry, a gantry height adjusting mechanism for adjusting the height of the gantry, a trough main body disposed on the gantry, and a side guide plate provided on the trough main body for guiding a passage material. It has a side guide and a side guide interval adjustment mechanism for adjusting the distance between the opposing side guide plates,
The trough body, Ri vertically movable der through the frame,
The gantry comprises a cylindrical fixed base that is concentric with each other, and a movable base that is housed and supported by the fixed base in a vertically movable manner.
The movable base is provided with a bearing portion having a shaft hole in the shaft center portion, supports the trough body via a support plate attached to the upper end portion, and can push up the bottom portion of the trough body.
The gantry height adjustment mechanism is arranged at the axial center of the fixed base and the movable base and is provided integrally with the movable base, and on the one hand, is connected to the lifting screw shaft and the other And a transmission shaft through which the driving force from the driving source is transmitted.
The trough between mills in strip rolling, wherein the lifting screw shaft is housed in a shaft hole of a bearing portion of the movable table . The side guide interval adjusting mechanism includes a first drive transmission mechanism that transmits a driving force from a drive motor that is a drive source, a second drive transmission mechanism that is linked to the first drive transmission mechanism, and the second drive transmission mechanism. A third drive transmission mechanism that is linked to the drive transmission mechanism, and an upstream side and a downstream side of the trough body and in the width direction of the side guide. The distance adjustment screw shaft is connected to the side guide plate and adjusts the distance between the side guide plates facing each other. The trough between mills in the steel bar rolling according to claim 1, which is possible. The slide shafts are arranged respectively on the upstream side and the downstream side of the trough body, facing the width direction of the trough body, and each slide shaft is connected to a side guide plate. The trough between mills in the steel bar rolling according to 2. A descaling device is disposed at the end of the trough body, and the descaling device includes a descaling pipe, an injection nozzle provided in the descaling pipe, and a connecting member connected to the side guide plate. and which, mill between troughs in the long products rolling according to any one of claims 1 to 3 this coupling member is characterized that you have attached to descaling pipe.

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