JP4910387B2 - Rolled material holding device and hot rolling equipment provided with the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a rolled material holding device that moves a rolled material on a conveyance table to a position where a subsequent rolled material can pass and holds it in a standby state in a hot rolling facility such as a thick plate rolling facility.

  For example, in the steel plate rolling, an excellent steel material is built by performing controlled rolling (CR).

  At that time, when the temperature at the time of controlled rolling (controlled rolling start temperature) is low and the plate thickness at the time of controlled rolling (controlled rolling start plate thickness) is thick, the rolled material becomes the controlled rolling start temperature. Since a considerable amount of time is required, the rolled material is kept on standby until the controlled rolling start temperature is reached on the conveyance table near the hot rolling mill. As a result, there is a problem that idle time is generated in the hot rolling mill due to the waiting for cooling, and the rolling efficiency is hindered.

  In order to avoid that the idle time is generated in the hot rolling mill due to such cooling waiting and the rolling efficiency is hindered, for example, Patent Document 1 discloses a transport table on the entry side of the finishing mill of the hot rolling facility. , A rolled material standby device (holding device) comprising a lifting device having a cantilevered fork-like arm that lifts the hot rolled material on the transfer table to a height that allows the subsequent rolled material to pass therethrough Is disclosed.

FIG. 9 shows a standby device for a rolled material described in Patent Document 1. Cooling waiting to be rolled material is fed on the table rollers R of the conveyor line, and stops in the state of S _1. The lifting device 91 by wait for the state of S ₂ to lift the rolled material placed on a forked arm 92 has to drive the geared motor 95 pieces. As a result, even if the rolled material that needs to wait for cooling is waiting for time, the subsequent rolled material can be rolled over the rolled material on standby, and the rolling efficiency is not hindered.

Further, in Patent Document 2, a temperature adjustment zone for adjusting the temperature of the rolling material is provided on the conveyance table on the entry side of the rough rolling mill of the hot rolling equipment, and the hot rolling material on the conveyance table is lifted to rough A transfer device is disclosed that includes a hanger that can be raised and lowered to reciprocate between a rolling mill and a temperature control zone.
JP-A-4-274814 JP-A-8-323404

  However, in the standby device (holding device) for the rolled material described in Patent Document 1, the rolled material is lifted by placing it on a cantilevered fork-like arm, so that the cantilevered fork-like arm is supported. The lifting device to be lifted and lowered needs to have a strong structure, and a large installation space for installing such a lifting device is required close to the transfer table. Therefore, when a large installation space cannot be secured in the vicinity of the transfer table, the overtaking rolling apparatus described in Patent Document 1 cannot be applied.

  Further, in the rolled material transfer apparatus described in Patent Document 2, since the rolled material is lifted by a hanger, only the local portion of the rolled material can be held, so that the rolled material is thin at high temperature with low rigidity. In particular, in the case of a large area, since the holding portion is smaller than the area of the rolled material, the rolled material cannot be lifted because there is a risk of large deformation or breakage.

  The present invention has been made in view of the circumstances as described above. In a hot rolling facility such as a thick plate rolling facility, the subsequent rolled material is used as a rolled material on a conveying table in order to perform overtaking rolling. A rolling material holding device that can be installed without a large space as a rolling material holding device used when lifting and holding to a height that can be passed, and can appropriately lift and hold the rolling material It is an object to provide a hot rolling facility equipped with the holding device.

  In order to solve the above problems, the present invention has the following features.

[1] In a hot rolling facility for a thick plate made of steel, a rolled material holding device for lifting and holding the rolled material upward from the conveying table,
An elevating frame disposed so as to be movable up and down above the transfer table;
A plurality of holding arms provided on the lifting frame to hold the rolled material on both sides of the transfer table;
The holding arm extends from the lower part hanging from the lifting frame and the lower end of the hanging part toward the center of the width of the conveyance table, and is arranged in a gap between adjacent table rollers of the conveyance table, It has a holding part that pushes up the lower surface of the rolled material by raising the lifting frame,
An apron is installed in the gap between the table rollers other than the part where the holding part moves up and down, and the holding part has a sheet width of 1000 mm to 5500 mm without moving the holding arm in the rolling material width direction. Has a rolled material width direction dimension capable of holding at least 150 mm on each side.

  [2] The rolled material holding apparatus according to [1], wherein the lifting frame is supported so as to be movable up and down by a support provided on both sides of the transport table.

  [3] The rolling material holding device according to [1], wherein the lifting frame is held so as to be lifted and lowered by a frame installed above the transfer table.

[4] A hot rolling mill, a conveyance table comprising a plurality of table rollers for conveying a rolled material to the hot rolling mill, and an apron installed in a gap between the table rollers, and the hot rolling mill A hot rolling facility for a thick plate made of steel, having a holding device that lifts and holds the rolled material from the transport table on the upstream side of
A thick plate hot rolling facility comprising the holding device according to any one of [1] to [3] as a holding device.

[5] A method for producing a metal material using the thick plate hot rolling facility according to [4],
After the metal material is rolled to a predetermined thickness by the hot rolling mill, the metal material is waited at a place where the subsequent metal material can pass by the holding device, and the subsequent metal material is rolled by the hot rolling mill. On the other hand, the waiting metal material is returned onto the transfer table, and subsequently rolled by the hot rolling mill following the subsequent metal material.

  In the present invention, the rolling material is lifted by holding the lower surface of the rolled material on both sides of the conveying table (both sides in the plate width direction) by a plurality of holding arms provided on an elevating frame arranged to be movable up and down above the conveying table. Therefore, it can be installed without a large space in the vicinity of the transfer table, and even a rolled material having a high thickness and a thin plate thickness can be appropriately lifted and held.

  Embodiments of the present invention will be described with reference to the drawings. Here, a case where the rolled material is a steel material will be described as an example.

  A steel material holding device according to an embodiment of the present invention is shown in FIGS. 1 is a front view, FIG. 2 is a side view, FIG. 3 is an AA arrow view (plan view) in FIG. 2, and FIG. 4 is an BB arrow view (plan view) in FIG.

  As shown in FIGS. 1 to 4, the steel material holding device 1 according to this embodiment is a hot rolling facility such as a thick plate rolling facility, in which the steel material 10 on the transport table (roller table) 11 is replaced by a subsequent steel material. It is a steel holding device that moves to a position where it can pass and holds it in a standby state, and is supported by four struts (supports) 21 provided on both sides of the transport table 11 and two struts 21 respectively. Two horizontal frames 31 that move up and down along the column 21, a vertical frame 32 that is mounted across the two horizontal frames 31, and a pair of the vertical frames 32 that face each other in the transport direction. And a plurality of sets (here, 10 sets) of holding arms 33 that hold the steel material 10 on both sides of the transfer table 11. The holding arm 33 has a hanging portion 33b hanging from the vertical frame 32 and a holding portion 33a extending from the lower end of the hanging portion 33b toward the center of the width of the transfer table 11, and the holding portion 33a is a lifting frame (horizontal frame). 31, the vertical frame 32) is engaged with the lower surface of the steel material 10 (the lower surface of the steel material 10 is pushed up).

  And in order to raise / lower the horizontal frame 31 along the support | pillar 21, the four electric cylinders 22 are each provided in proximity to the four support | pillars 21, and the motor 23 is 1 between the two electric cylinders 22, respectively. It is installed one by one. The rotational power of the motor 23 is transmitted to the electric cylinder 22 via the rotation transmission shaft 24 so that the electric cylinder 22 operates.

  The holding portion 33a of the holding arm 33 is disposed in the gap between the adjacent table rollers 12, and is positioned below the surface of the transport table 11 when lowered and positioned above the surface of the transport table 11 when raised. be able to.

  Further, in order to prevent the tip of the warped steel material from dropping into the gap between the table roller 12 and the table roller 12, an apron 13 is installed in the gap between the table rollers 12, and the holding portion 33 a of the holding arm 33. The apron 14 is also provided between the holding portions 33a of the holding arms 33 facing each other (that is, near the center of the width of the transfer table 11) in the gap between the table roller 12 and the table roller 12 in which is disposed. This prevents the tip of the steel material from falling into the gap between the table rollers 12.

  Incidentally, in the overtaking rolling apparatus described in Patent Document 1, since the cantilevered fork-like arm is inserted into the gap between the table rollers, an apron cannot be installed between the table rollers, so that the steel material is conveyed. May cause trouble.

  And in the steel material holding device 1 according to this embodiment configured as described above, when performing overtaking rolling or the like, as shown in FIG. It is placed on the holding part 33a of 33 and lifted and held from above the table roller 12 to a height that allows the subsequent steel material to pass.

  In addition, about the dimension of the holding | maintenance part 33a and the apron 14, while ensuring the width | variety of the apron 14 required to prevent that steel materials fall into the clearance gap between the table rollers 12, the holding arm 33 is moved to the steel material width direction. Even if it does not have, it is set so that the holding | maintenance part 33a can hold | maintain the steel materials of all the board widths made into object as it is.

  For example, as shown in FIG. 6, when the plate width W of the target steel material is 1000 mm to 5500 mm, the width Le of the apron 14 is 500 mm, and the interval S between the apron 14 and the holding portion 33a is 100 mm. The length Lh of the portion 33a is 2500 mm. Thereby, since the distance (Le + 2S) between the tips of the holding portion 33a is 700 mm, a steel material having a minimum width of 1000 mm can be held by the holding portion 33a by 150 mm on each side. On the other hand, since the distance (Le + 2S + 2Lh) between the roots of the holding portion 33a is 5700 mm, the steel material having the maximum width of 5500 mm can be held as it is by the holding portion 33a.

  FIG. 7 schematically shows a state in which overtaking rolling is performed using the steel material holding device 1. For example, a preceding material 10 a that needs to be cooled, such as a strong CR material, is placed on the table by the holding device 1. While the roller 10 is lifted and held and the preceding material 10a is waiting for cooling, the hot rolling mill 5 performs rolling of the succeeding material 10b that does not require waiting for cooling, such as an As-Rolled material or a weak CR material. Do. As a result, it is avoided that idle time is generated in the hot rolling mill 5 due to cooling.

  Thus, the steel material holding device 1 according to this embodiment is provided on the frames 31 and 32 that move up and down along the four support columns 21 installed on both sides of the transport table 11 when performing overtaking rolling or the like. Further, since the steel material 10 is lifted by holding the lower surface of the steel material 10 on both sides of the conveying table 11 (both sides in the plate width direction) by the holding portions 33a of the ten sets of holding arms 33, the steel material 10 is lifted in the vicinity of the conveying table 11. It can be installed even if there is no space, and it can be appropriately lifted and held even if it is a steel material with a thin plate thickness and a large area at a high temperature.

  And in the hot rolling equipment provided with the steel material holding | maintenance apparatus 1 which concerns on this embodiment, steel materials can be rolled without generating the idle time by waiting for cooling, and a rolling efficiency can be improved.

  In this embodiment, two holding arms 33 are attached as a pair so as to face each other in the transport direction. However, the present invention is not limited to this, and the steel material 10 is placed on both sides of the transport table 11. If it can hold | maintain, the holding | maintenance arm 33 may be attached one by one along the conveyance direction. For example, the holding arms 33 in different directions may be attached alternately (in a staggered manner) along the transport direction. Incidentally, also in this case, the holding portion 33a of the holding arm 33 is arranged in the gap between the adjacent table rollers 12, and the apron 14 is placed in the gap between the table rollers 12 other than the portion where the holding portion 33a is positioned and moved up and down. is set up. In addition, it is preferable that the apron 14 is installed including the conveyance table 11 width center part at least.

  Next, another embodiment of the present invention is shown in FIG. In the steel material holding device 1 described above, four electric cylinders 22 are provided in close proximity to the four pillars 21, and the horizontal frame 31 is pushed up and down along the pillars 21 by the electric cylinders 22. On the other hand, in the steel material holding device 2 according to this embodiment, the gantry 25 is installed between the upper ends of the two struts 21 facing each other with the transport table 11 interposed therebetween, and the hydraulic cylinder 26 is attached to the gantry 25. The horizontal frame 31 is lifted or hung while being guided by the column 21 by the hydraulic cylinder 26. As a result, the holding device can be made more compact.

  Here, the gantry 25 is installed above the transport table 11 by being supported by the support column 21, but the present invention is not limited to this. The frame 31 may be lifted or hung. For example, you may make it install the mount frame 25 using the beam of a building upper part.

  Here, the case where the rolled material is a steel material has been described as an example. However, the present invention is not limited thereto, and is applicable to a metal material including a case where the rolled material is a non-ferrous metal material such as aluminum. be able to.

It is a front view of the holding | maintenance apparatus of the steel material which concerns on one Embodiment of this invention. It is a side view of the holding | maintenance apparatus of the steel material which concerns on one Embodiment of this invention. It is an AA arrow line view (plan view) of FIG. It is a BB arrow line view (plan view) of FIG. It is a front view of the use condition of the holding | maintenance apparatus of the steel material which concerns on one Embodiment of this invention. It is explanatory drawing about the dimension of the holding | maintenance apparatus of the steel material which concerns on one Embodiment of this invention. It is explanatory drawing of overtaking rolling using the holding | maintenance apparatus of steel materials. It is a front view of the holding | maintenance apparatus of the steel material which concerns on other embodiment of this invention. It is explanatory drawing of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel material holding device 2 Steel material holding device 5 Hot rolling mill 10 Steel material 10a Preceding material 10b Subsequent material 11 Conveying table 12 Table roller 13 Apron 14 Apron 21 Strut 22 Electric cylinder 23 Motor 24 Rotation transmission shaft 25 Base 26 Hydraulic cylinder 31 Horizontal frame 32 Vertical frame 33 Holding arm 33a Holding part 33b Hanging part

Claims (5)

In a hot rolling facility for thick steel plates, a rolled material holding device for lifting and holding the rolled material upward from the conveying table,
An elevating frame disposed so as to be movable up and down above the transfer table;
A plurality of holding arms provided on the lifting frame to hold the rolled material on both sides of the transfer table;
The holding arm extends from the lower part hanging from the lifting frame and the lower end of the hanging part toward the center of the width of the conveyance table, and is arranged in a gap between adjacent table rollers of the conveyance table, It has a holding part that pushes up the lower surface of the rolled material by raising the lifting frame,
An apron is installed in the gap between the table rollers other than the part where the holding part moves up and down, and the holding part has a sheet width of 1000 mm to 5500 mm without moving the holding arm in the rolling material width direction. Has a rolled material width direction dimension capable of holding at least 150 mm on each side.   2. The rolled material holding apparatus according to claim 1, wherein the elevating frame is supported so as to be movable up and down by a support body installed on both sides of the transport table.   The rolling material holding device according to claim 1, wherein the lifting frame is held so as to be lifted and lowered by a frame installed above the transfer table. A conveying table comprising a hot rolling mill, a plurality of table rollers for conveying the rolled material to the hot rolling mill, and an apron installed in a gap between the table rollers, and an upstream side of the hot rolling mill And a holding device for lifting and holding the rolled material from above the conveying table, a hot rolling facility for a thick plate made of steel ,
A hot rolling facility for thick plates, comprising the holding device according to any one of claims 1 to 3 as a holding device. It is a manufacturing method of the metal material using the hot rolling equipment of the thick plate according to claim 4,
After the metal material is rolled to a predetermined thickness by the hot rolling mill, the metal material is waited at a place where the subsequent metal material can pass by the holding device, and the subsequent metal material is rolled by the hot rolling mill. On the other hand, the waiting metal material is returned onto the transfer table, and subsequently rolled by the hot rolling mill following the subsequent metal material.

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