KR20120073335A - Hot rolling equipment and method for manufacturing steel product using the hot rolling equipment - Google Patents

Abstract

In a hot rolling facility, in order to perform overtaking rolling etc., it can be installed even if there is no large space as a holding apparatus which raises the rolling material on a conveyance table to the height which can pass through a subsequent rolling material, and can raise a rolling material suitably. Provide a retaining device. The steel material 10 is conveyed by the holding part 33a of the holding arm 33 of several sets attached to the frames 31 and 32 which move up and down along the four support | pillar 21 formed in the both sides of the conveyance table 10. As shown in FIG. Hold on both sides of the table and lift it up. Provided are a holding arm having a holding portion having an appropriate heat insulating structure, and a holding device having the holding arm. Even when the control rolling material which requires a cooling atmosphere is included, the hot rolling facility which can reduce the empty time of a hot rolling mill, and improve rolling efficiency, and the hot rolling method using the same are provided.

Description

HOT ROLLING EQUIPMENT AND METHOD FOR MANUFACTURING STEEL PRODUCT USING THE HOT ROLLING EQUIPMENT}

TECHNICAL FIELD This invention relates to a hot rolling facility and the manufacturing method of the steel material using the same.

For example, in the steel plate rolling of steel materials, the steel material of the outstanding material is produced by performing Controlled Rolling (CR).

In that case, when the temperature (control rolling start temperature) at the time of performing control rolling is low and the plate thickness (control rolling start plate thickness) at the time of performing control rolling is thick, until a rolling material will become a control rolling start temperature Since a considerable time was required, the rolling material was allowed to stand on the conveying table near the hot rolling mill until the controlled rolling start temperature was reached. As a result, the free air generate | occur | produced in the hot rolling mill by the cooling atmosphere, and the problem that rolling efficiency was impaired arises.

In order to avoid that empty time generate | occur | produces in a hot rolling mill by such a cooling atmosphere, and rolling efficiency is impaired, For example, patent document 1 conveys in the conveyance table of the finishing mill entrance side of a hot rolling mill. A rolling material waiting apparatus (holding device) having a lifting device having a cantilevered fork-shaped arm that lifts a high temperature rolled material on a table to a height at which a subsequent rolled material can pass and maintains it in a standby state is disclosed.

9 has shown the waiting apparatus of the rolling material of the said patent document 1. As shown in FIG. It rolled material to cooling air sent by the table rollers (R) of the conveying line, is stopped at the S ₁ state. Then, the geared motor 95 is driven by the elevating device 91 to be mounted on the arm 92 of the cantilevered fork shape, and the rolled material is lifted up to stand by in the state S ₂ . Thereby, even if the rolling material which requires a cooling atmosphere waits for time, the subsequent rolling material can roll over the rolling material which is waiting, and rolling efficiency will not be impaired.

In addition, Patent Document 2 forms a temperature adjusting band for adjusting the temperature of the rolled material on the conveying table at the side of the rough rolling mill of the hot rolling mill, and lifts the high-temperature rolled material on the conveying table to adjust the roughing mill and the temperature. Disclosed is a conveying apparatus having a liftable hanger for reciprocating between belts.

Patent Document 1: Japanese Patent Application Laid-Open No. 4-274814

Patent Document 2: Japanese Patent Application Laid-Open No. 8-323404

DISCLOSURE OF INVENTION

However, in the waiting apparatus (holding apparatus) of the rolling material of the said patent document 1, since it mounts on a cantilever fork-shaped arm and raises a rolling material, the lifting and lowering which supports and elevates the cantilever fork-shaped arm is carried out. It is necessary to make the apparatus firm, and a large installation space for installing such a lifting device is needed in proximity to the conveyance table. Therefore, when the large installation space cannot be secured close to the conveyance table, the overtaking rolling apparatus described in Patent Document 1 above cannot be applied.

Moreover, in the conveying apparatus of the rolling material of the said patent document 2, since it is made to raise a rolling material by a hanger, since only a local part of a rolling material can be maintained, it is made to the rolling material with thin plate | board thickness at high temperature with low rigidity. In particular, in the case of a large area, the holding portion is smaller than the area of the rolling material, and therefore, there is a fear of large deformation or breaking of the rolling material, and therefore cannot be lifted.

This invention is made | formed in view of the above circumstances, In hot rolling equipments, such as a thick plate rolling installation, in order to perform overtaking rolling etc., the rolling material on a conveyance table is lifted and held to the height which a following rolling material can pass. As a holding device for a rolled material to be used at the time, it is possible to provide a rolling material holding device that can be installed without a large space and to be able to lift and hold the rolling material as appropriate, and to provide a hot rolling facility having the holding device. The purpose is to.

In addition, when using the above-mentioned steel holding apparatus, it is necessary to make the part (holding part) which mounts a high temperature steel material on an upper surface into a heat resistant structure. Not only can the holding part be protected from high temperatures at that time, but it can also avoid the occurrence of local cooling (cooling non-uniformity, temperature non-uniformity) in the steel by contact with the holding part, or withstand impact loads such as the moment of lifting the steel. It is important to have a structure that can.

In general, as a heat resistant structure at a point of contact with a high temperature steel, research is being conducted to reduce the contact area with steel materials using high heat resistant steel having a high temperature strength or the like (heated working beam skid button, heating extractor, etc.). Although the structure etc. which were attached in the state which peeled off heat insulating materials, such as a lead, are used, when it is going to employ | adopt these heat insulation structures to the holding part mentioned above, there exist the following faults.

 First, in the case where heat-resistant steel or the like is used, the contact area with the steel can be reduced to a certain extent, but the temperature nonuniformity remains since the fundamental solution is not solved. Moreover, since heat-resistant steel etc. are expensive, an expected cost was low about temperature nonuniformity because facility cost was high.

Moreover, when using the structure mounted in the state which peeled off heat insulating materials, such as a lead, the heat insulating material was damaged by impact loads, such as the moment of lifting a steel material, and fell to a conveyance line.

The present invention has been made in view of the above circumstances, and is used for lifting a high temperature metal material in a hot rolling facility such as a thick plate rolling facility, and a holding arm having a suitable heat insulation structure for mounting a high temperature metal material thereon. And a holding device.

Moreover, although it is suggested by the said patent document 1 that an overtaking rolling can be performed using a waiting apparatus, when rolling is carried out when the control rolling material which requires a cooling atmosphere is included, how to perform a rolling of a hot rolling mill is required. It is not disclosed whether time can be reduced to improve rolling efficiency.

For example, when using the atmospheric apparatus described in patent document 1, after passing a subsequent rolling material as it is, it is difficult to continue rolling the control rolling material which was waiting at good timing. That is, while the waiting device is waiting in the air-cooled state until the controlled rolling material reaches a predetermined temperature, it is difficult to always prepare the rolling material to overtake, and a situation in which the hot rolling mill becomes empty is frequent. As a result, a decrease in production per hour is inevitable.

The present invention has been made in view of the above circumstances, and even when a controlled rolling material requiring a cooling atmosphere is included, a hot rolling facility which can reduce the free time of a hot rolling mill and improve rolling efficiency and It aims at providing the manufacturing method of the used steel material.

Means for solving the problem

In order to solve the said subject, this invention has the following characteristics.

[1] In a hot rolling facility, a rolling material holding device for lifting and holding a rolled material upward from a transport table, the lifting frame disposed so as to be elevated above the transport table, and the rolled material on both sides of the transport table. And a plurality of holding arms formed on the lifting frame for holding at the lifting frame, the holding arms having a holding portion that can be engaged with the lower surface of the rolling material by the lifting of the lifting frame.

[2] A holding device for a rolled material according to the above [1], wherein the elevating frame is supported so as to elevate and support the supports provided on both sides of the conveying table.

[3] The lifting frame holding device according to the above [1], wherein the lifting frame is held so that the lifting frame can be lifted and lowered on a mount provided above the conveying table.

[4] The holding arm includes a lower part extending downward from the lifting frame and a holding part extending from the lower end of the lower part to the conveying table width center direction. The holding apparatus of the rolling material in any one of [3].

[5] A rolling table comprising a hot rolling mill, a plurality of table rollers for conveying the rolled material to the hot rolling mill, and an apron provided in a gap between the table rollers, and a rolling material on the upstream side of the hot rolling mill. A hot rolling facility having a holding device for lifting and holding the same, as the holding device [1]? The holding device of the rolling material according to any one of [4], wherein the holding part of the holding arm of the holding device is disposed in the gap between the table rollers, and an apron is provided in the gap between the table rollers other than the portion where the holding part is lifted. Hot rolling equipment characterized in that.

[6] A method for producing a metal material using the hot rolling equipment according to the above [5], wherein after rolling the metal material to a predetermined thickness with the hot rolling mill, the metal material passes through the metal material by the holding device. A method of producing a metal material, wherein the metal material is rolled to the hot rolling mill while the metal material in standby is returned to the conveying table, followed by rolling to the hot rolling mill.

[7] A holding arm for use in lifting a high temperature metal material, comprising a holding part for mounting a metal material, the holding part having a holding part main body and a first heat insulating material covering a side in contact with at least a metal material of the holding part main body; And a cover for covering the first heat insulating material and in contact with the metal material.

[8] The holding arm of the metal material according to the above [7], wherein the cover in contact with the metal material is a metal cover.

[9] The cover in contact with the metal material includes a metal cover covering the first heat insulating material, and a second heat insulating material mounted on an upper surface of the metal cover and having elasticity in contact with the metal material. The holding arm of the metal material of description.

[10] The holding arm includes a drooping portion extending downward and a holding portion extending in the horizontal direction from the lower end of the drooping portion. The holding arm of the metal material in any one of [9].

[11] A holding device for a metal material, which lifts and holds a metal material upward from a conveying table, the lifting frame disposed so as to be elevated above the conveying table, and formed on the lifting frame to hold the metal material on both sides of the conveying table. A plurality of the above [7]? A holding device for a metal material according to any one of [10], wherein the holding part of the holding arm pushes up the lower surface of the metal material by the lifting of the lifting frame.

[12] A hot rolling facility, wherein the holding device according to the above [11] is provided on an upstream side or a downstream side of the hot rolling mill.

[13] A method for producing a metal material using the hot rolling facility as described in [12], wherein the metal material is rolled to a predetermined thickness with the hot rolling mill, and then the metal material can be passed through the holding device by the holding device. And a subsequent metal material is rolled by said hot rolling mill, while the metal material in standby is returned to a conveyance table, and it is then rolled by said hot rolling mill following said metal material.

[14] An upstream side of the reversible hot rolling mill is provided with a waiting device for waiting the rolled material at a place where the subsequent rolled material can pass from the conveying table, and the rolled material is cooled downstream of the reversible hot rolling mill. Hot-rolling equipment comprising a cooling device for making.

[15] A hot rolling method using the hot rolling equipment according to the above [14],

The first slab is rolled to a predetermined plate thickness by the reversible hot rolling mill, and then cooled to a temperature that can be controlled rolled by the cooling device, and the second slab is predetermined by the reversible hot rolling mill during this cooling. Roll to the plate thickness, and after rolling, maintain and cool to the temperature which can be controlled rolling by the said waiting apparatus, and conveying the said 1st slab to the said reversible hot rolling mill to the finishing plate thickness. Rolling, and sending a third slab to the reversible hot rolling mill to roll to the finish plate thickness, and after finishing rolling, sending the second slab to the reversible hot rolling mill to roll to the finish plate thickness. Hot rolling method characterized in that.

[16] A hot rolling facility, comprising: a cooling device for cooling the rolled material on an upstream side of the hot rolling mill; and a waiting device for waiting the rolled material at a place where subsequent rolling materials can pass from the conveying table. .

[17] The hot rolling equipment according to the above [16], wherein the waiting apparatus is a device that lifts a rolled material upward from a conveying table.

[18] A method for producing a steel using the hot rolling facility as described in the above [16] or [17], wherein after the steel is rolled to a predetermined thickness by the hot rolling mill, the steel is passed through the standby apparatus to a subsequent steel. After waiting in a place where it can be, the subsequent steel is rolled by the hot rolling mill, while the standby steel is returned to the conveying table, conveyed to the cooling apparatus, cooled to a predetermined temperature, and then the hot Finishing rolling by a rolling mill, The manufacturing method of steel materials characterized by the above-mentioned.

[19] an upstream side of a reversible hot rolling mill, comprising: a first cooling device for cooling the rolled material; and a standby device for waiting the rolled material at a place where subsequent rolled material can pass from the conveying table; The downstream rolling apparatus of the type hot rolling mill was provided with the 2nd cooling apparatus for cooling a rolling material.

[20] The hot rolling equipment according to the above [19], wherein a thermometer for measuring the temperature of the rolled material is formed in the first cooling device, the standby device, and the second cooling device, respectively.

[21] A hot rolling method using the hot rolling equipment as described in the above [19] or [20], wherein the first slab is rolled to a predetermined plate thickness by the reversible hot rolling mill, and then the first slab is applied to the atmospheric apparatus. By waiting at the place where a subsequent rolling material can pass from a conveying table top, a 2nd slab is sent to the said reversible hot rolling mill, rolling is carried out, and the 1st slab made to stand by a waiting apparatus is returned on a conveying table, It is sent to the said 1st cooling apparatus, it cools to predetermined temperature, and a 2nd slab is rolled to predetermined plate | board thickness with the reversible hot rolling mill, and it is conveyed to the downstream side, and a 1st slab is conveyed to the said 2nd cooling apparatus after that While cooling the first slab to a temperature at which the second slab can be controlled rolled, the third slab is sent to the reversible hot rolling mill to After rolling to the plate thickness, the 3rd slab is conveyed to an upstream side, and the 1st slab cooled to the temperature which can be controlled-rolled by a 2nd cooling apparatus is sent to the said reversible hot rolling mill, and it rolls to the finish plate thickness. Hot rolling method characterized in that.

In the present invention, the lower surface of the rolling material is held on both sides of the conveying table (both in the plate width direction) by a plurality of holding arms formed on the elevating frame arranged so as to elevate above the conveying table so as to lift the rolling material. Therefore, even if there is no large space close to the conveyance table, it can be installed, and even a rolled material with a small plate thickness at a high temperature and a large area can be properly lifted and held.

In this invention, since the holding part of a holding arm is equipped with the 1st heat insulating material which covers the side which contacts the metal material of a holding part main body, and the cover which contacts a metal material while covering a 1st heat insulating material, the heat insulation effect of a 1st heat insulating material This protects the holding part main body from high heat, suppresses the occurrence of cooling unevenness of the metal material, and can also take the impact load by the cover.

Moreover, when the holding device provided with the holding arm of this structure is installed in a hot rolling facility of a metal material, and a metal material is manufactured, stable metal materials, such as shape precision and a material, can be manufactured efficiently.

In the present invention, when a controlled rolling material requiring a cooling atmosphere is included, it is possible to appropriately combine the cooling by the cooling device and the overtaking rolling using the waiting device, thereby reducing the empty time of the hot rolling mill. The number of rolled materials to be rolled can be increased, thereby improving rolling efficiency.

In the present invention, in accordance with the rolling end time of the subsequent rolling material, the standby rolling material (controlled rolling material) can be cooled by the cooling device so as to have a predetermined temperature at a predetermined time, so that the hot rolling mill does not empty. Can be rolled to improve rolling efficiency.

In this invention, when the control rolling material which requires a cooling air | atmosphere is included, since the cooling by the 1st, 2nd cooling apparatus and the overtaking rolling using a waiting apparatus can be combined suitably, it is a thing of a hot rolling mill. By reducing the empty time, it is possible to increase the number of rolled material to be rolled to improve the rolling efficiency.

1 is a front view of a holding device for steel materials according to one embodiment of the present invention.
2 is a side view of the steel holding apparatus according to the embodiment of the present invention.
3 is a view (top view) seen in the direction of the arrow AA in FIG. 2.
4 is a view (top view) seen in the direction of the BB arrow of FIG. 2.
It is a front view of the use condition of the holding apparatus of steel materials which concerns on one Embodiment of this invention.
It is explanatory drawing about the dimension of the holding apparatus of steel materials which concerns on one Embodiment of this invention.
It is explanatory drawing of the overtaking rolling using the holding apparatus of steel materials.
8 is a front view of a steel holding device according to another embodiment of the present invention.
9 is an explanatory diagram of a prior art.
It is a partially enlarged front view of the holding arm of steel materials in one Embodiment of this invention.
10B is a partially enlarged plan view of a holding arm of a steel material in one embodiment of the present invention.
It is a figure which shows the heat insulation structure in one Embodiment of this invention (the figure seen from the AA arrow direction of FIG. 10A).
It is a figure which shows the heat insulation structure in other embodiment of this invention.
It is a front view of the whole structural diagram of the holding apparatus of steel materials which concerns on one Embodiment of this invention.
It is a side view of the whole structural figure of the holding apparatus of steel materials which concerns on one Embodiment of this invention.
It is a figure which shows the layout of the hot rolling installation which concerns on one Embodiment of this invention, and the procedure of the hot rolling method using the hot rolling installation.
It is a figure which shows the procedure of the layout of the hot rolling installation which concerns on one Embodiment of this invention, and the manufacturing method of the steel materials using this hot rolling installation.
It is a figure which shows the layout of the hot rolling installation which concerns on one Embodiment of this invention, and the procedure of the hot rolling method using the hot rolling installation.

Carrying out the invention  Best form for

One embodiment of this invention is described based on drawing. In addition, the case where a rolling material is a steel material is demonstrated here as an example.

The holding | maintenance apparatus of the steel material which concerns on one Embodiment of this invention is shown in FIG. 4 is shown. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a view (plan view) in the direction of arrow A-A of FIG. 2, and FIG. 4 is a view (plan view) in the direction of arrow B-B in FIG.

1? As shown in FIG. 4, the steel holding device 1 according to this embodiment has a subsequent steel material passing through the steel material 10 on the conveying table (roller table) 11 in a hot rolling facility such as a thick plate rolling facility. A steel holding device which is moved to a position where it can be held and held in a standby state, comprising four support posts 21 formed on both sides of the conveying table 11 and two support posts 21 supported by two support posts 21, respectively. Two transverse frames 31 which move up and down along 21, a longitudinal frame 32 mounted over the two transverse frames 31, and a pair of two transverse frames to the longitudinal frame 32 are opposed to each other in the conveying direction. It is attached so that it may be equipped with the holding arm 33 of the multiple tank (here 10 tank) which hold | maintains the steel material 10 from the both sides of the conveyance table 11. The holding arm 33 has a drooping portion 33b extending from the vertical frame 32 and a holding portion 33a extending in the conveying table 11 width center direction from the lower end of the drooping portion 33b. The 33a is engaged with the lower surface of the steel material 10 (by pushing up the lower surface of the steel material 10) by the lifting of the lifting frame (the horizontal frame 31, the vertical frame 32).

In order to elevate the horizontal frame 31 along the support posts 21, four electric cylinders 22 are formed in close proximity to the four support posts 21, respectively, and a motor is provided between the two electric cylinders 22, respectively. 23 are provided one by one. The rotational power of the motor 23 is transmitted to the electric cylinder 22 via the rotation transmission shaft 24, and the electric cylinder 22 is operated.

Moreover, the holding part 33a of the holding arm 33 is arrange | positioned in the clearance gap between the adjacent table rollers 12, is located below the conveyance table 11 surface as it descends, and the conveyance table 11 as it raises. It can be located above the face.

In addition, in order to prevent the tip of the steel sheet bent downward from falling into the gap between the table roller 12 and the table roller 12, an apron 13 is provided in the gap between the table roller 12, and the holding arm ( Even in the gap between the table roller 12 and the table roller 12 on which the holding part 33a of the 33 is disposed, between the holding parts 33a of the holding arms 33 facing each other (that is, the conveying table 11 width) The apron 14 is formed in the vicinity of the center part. This prevents the tip of the steel from falling into the gap between the table rollers 12.

In addition, in the overtaking rolling apparatus of the said patent document 1, since a cantilever fork-shaped arm is inserted in the clearance gap between table rollers, since an apron cannot be provided between the table rollers, there exists a possibility that it may interfere with conveyance of steel materials.

And in the steel holding device 1 which concerns on this embodiment comprised as mentioned above, when performing overtaking rolling etc., as shown in FIG. 5, the electric cylinder 22 is operated and the steel material 10 is hold | maintained. It mounts on the holding part 33a of the arm 33, and lifts it to the height which a following steel material can pass through on the table roller 12, and is hold | maintained.

Moreover, about the dimension of the holding part 33a and the apron 14, while ensuring the width | variety of the apron 14 which is necessary to prevent a steel material from falling in the clearance gap between the table roller 12, the holding arm 33 It is set so that the holding part 33a can hold the steel materials of all the board | substrate widths as it is, even if it does not move to the steel width direction.

For example, as shown in FIG. 6, the plate | board width W of the steel material made into object is 1000 mm? In the case of 5500 mm, the width Le of the apron 14 is 500 mm, the spacing S of the tip of the apron 14 and the holding part 33a is 100 mm, and the length Lh of the holding part 33a is 2500. Mm. Thereby, since the distance (Le + 2S) between the front-end | tips of the holding | maintenance part 33a becomes 700 mm, the holding part 33a can hold the steel material of 1000 mm which is the minimum width by 150 mm on one side. On the other hand, since the distance (Le + 2S + 2Lh) between the vicinity of the holding | maintenance part 33a becomes 5700 mm, the steel material of 5500 mm which is the largest width can be hold | maintained as it is.

7 schematically shows a state in which the over-rolling is performed using the holding device 1 of the steel material. For example, the preceding material 10a which requires a cooling atmosphere such as steel CR material. ) Is lifted and held from the table roller 12 by the holding device 1, and the rolled (As-Rolled) material by the hot rolling mill 5 while the preceding material 10a is waiting for cooling. And rolling of the trailing material 10b which does not require cooling atmosphere such as weak CR material. Thereby, generation | occurrence | production of the empty time by cooling atmosphere in the hot rolling mill 5 can be avoided.

In this way, the steel holding apparatuses 1 according to this embodiment are frames 31 and 32 which move up and down along four pillars 21 provided on both sides of the conveying table 11 when performing overtaking or the like. Since the lower surface of the steel material 10 is hold | maintained at both sides (plate width direction both sides) of the conveyance table 11 by the holding part 33a of the holding arm 33 of 10 pairs, the steel material 10 is lifted up, In addition, even if there is no large space close to the conveyance table 11, even if it is a thin plate thickness and a large area steel material at high temperature, it can raise and hold suitably.

And in the hot rolling installation provided with the steel material holding apparatus 1 which concerns on this embodiment, steel materials can be rolled without generating the free time by a cooling atmosphere, and rolling efficiency can be improved.

In addition, in this embodiment, although the holding arm 33 is attached so that it may oppose each other with respect to a conveyance direction in two sets, it is not limited to this, as long as the steel material 10 can be hold by both sides of the conveying table 11, The holding arms 33 may be attached one by one along the conveying direction. For example, the holding arms 33 of different directions may be attached staggered (in a zigzag shape) along the conveyance direction. In addition, in that case, the holding part 33a of the holding arm 33 is arrange | positioned at the clearance gap between the adjacent table rollers 12, and between table rollers 12 other than the part to which the holding part 33a is located and elevating. An apron 14 is provided in the gap. Moreover, it is preferable that the apron 14 is provided including the conveyance table 11 width center part at least.

Next, another embodiment of this invention is shown in FIG. In the holding device 1 for steel materials described above, four electric cylinders 22 are formed in close proximity to the four pillars 21, respectively, and the horizontal frame 31 is supported by the electric cylinders 22. In the steel holding device 2 according to the present embodiment, the upper end of the two struts 21 facing each other with the conveying table 11 interposed therebetween. Mounting stand 25 is provided between them, hydraulic cylinder 26 is attached to the mounting stand 25, and it hangs up or hangs down while guiding horizontal frame 31 to support post 21 by hydraulic cylinder 26. . Thereby, a holding apparatus can be made more compact.

In addition, although the mount 25 is provided above the conveyance table 11 by supporting by the support | pillar 21 here, it is not limited to this, The mount 25 is installed above the conveyance table 11, The mount What is necessary is just to hang up or hang down the horizontal frame 31 from (25). For example, the mount 25 may be installed using the girders at the upper part of the building.

In addition, although the case where the rolled material is steel was demonstrated as an example here, this invention is not limited to this, It is applicable to a metal material also including the case where a rolled material is nonferrous metal materials, such as aluminum.

One embodiment of this invention is described based on drawing. In addition, the case where high temperature metal material is a rolled steel material is demonstrated as an example here. In addition, high temperature degree is the temperature of the metal material heated when hot-rolling a metal material, and in the case of thick plate rolling of steel materials, it is 500 degreeC? The temperature is about 1200 ℃.

First, FIG. 12 shows the whole structure of the holding apparatus of steel materials in embodiment of this invention. 13A is a front view and FIG. 13B is a side view.

As shown to FIG. 13A and FIG. 13B, the holding apparatus 1 of the steel materials in this embodiment is a conveyance table (roller table) in order to perform overtaking rolling etc. in hot rolling facilities, such as a thick plate rolling installation, and the like. An apparatus for lifting and holding the high-temperature steel 10 on the eleven to a height through which subsequent steel can pass, comprising a support 21 formed to face both sides of the conveying table 11, and two opposed supporters. Two in the horizontal frame 31 supported by the 21 and lifting up and down along the support 21, the vertical frame 32 mounted on the horizontal frame 31 and extending in the conveying direction, and the vertical frame 32. The tank is mounted so as to face each other with respect to the conveying direction, and has a holding arm 33 of a plurality of tanks (here, 10 tanks) for holding the steel material 10 on both sides of the conveying table 11. In addition, in order to raise and lower the horizontal frame 31 along the support post 21, the electric cylinder 22 and the operating motor 23 are provided in close proximity to each support post 21, respectively.

And the holding arm 33 has the drooping part 33b extended from the vertical frame 32, and the holding part 33a extended in the horizontal direction toward the conveyance table 11 width center from the lower end of the drooping part 33b. Have The holding | maintenance part 33a pushes up the lower surface of the high temperature steel material 10 by raising of the elevating frame (horizontal frame 31, the vertical frame 32), and arrange | positions in the clearance gap between adjacent table rollers 12. As shown in FIG. As it descends, it is located below the conveyance table 11 surface and ascends and can be located above the conveyance table 11 surface.

Therefore, dimensions, such as thickness and width of the holding part 33a, are restricted by the size of the gap between the table rollers 12, and cannot be a dimension with a margin, thereby ensuring structural strength that can stably maintain the steel material. For this purpose, it becomes important to protect the holding part 33a from high heat.

At the same time, it is also important to have a structure capable of withstanding impact loads such as the moment of lifting the steel material 10 as soon as the temperature nonuniformity is prevented from occurring in the steel material 10 due to the contact with the holding portion 33a.

10A and 10B are enlarged views of the holding part 33a of the holding arm 33 in one embodiment of the present invention, FIG. 10A is a front view, and FIG. 10B is a plan view. As shown to FIG. 10A and FIG. 10B, the holding part 33a is equipped with the heat insulation structure part 40 in the upper surface of the holding part main body 39. As shown to FIG.

FIG. 11: is a figure seen from the arrow direction A-A of FIG. 10A, and is a detailed view of the heat insulation structure part 40. FIG. The heat insulation structure part 40 covers the 1st heat insulating material 46 which covers the side which contact | connects the steel material of the holding part main body 39, and the U-shaped cross section which contacts the steel material, covering the 1st heat insulating material 46. A forced cover 45 is provided. In addition, while the steel cover 45 is attached to the holding part main body 39 by welding, the projection 48 is formed in predetermined space | interval at the lower surface of the ceiling part of the steel cover 45, and the 1st heat insulating material ( Positioning is achieved by inserting the projection 48 into the hole formed in 46.

Here, the first insulator 46 is an insulator to the main raw material for the porous material for the main ingredient of a heat-resistant inorganic material such as oxide ceramics, as the fiber material, plastic _{material, Al 2 O 3, SiO 2} , ZrO 2 or the like. However, since the 1st heat insulating material 46 is comparatively hard and fragile, since it is easy to be damaged by an impact load, it is covered by the steel cover 45, and the steel cover 45 is made to receive an impact load by the steel cover 45. FIG. In addition, it is preferable that the steel cover 45 uses the steel plate whose plate | board thickness is 12 mm or less. This is because the cover of such a thin steel sheet rises to a temperature equivalent to that of the steel material in a short time even if it is in contact with a high temperature steel material, so that local cooling of the steel material to be maintained can be avoided. Moreover, Preferably it is 6 mm or less. However, it is preferable to increase the thickness of the cover in terms of cooling non-uniformity suppression, but there is a problem in terms of strength, which is deformed by the weight of the steel 10 or the impact load at the time of lifting, and the inner first heat insulating material 46 There is a risk of damage. Therefore, there is a limit to thickening the cover, and it is appropriately determined in terms of the weight and the like of the lifting steel 10.

As mentioned above, in this embodiment, the holding part 33a covers the 1st heat insulating material 46 and the 1st heat insulating material 46 which have high heat insulation which covers the side which contacts the steel material of the holding part main body 39, and Since it is provided with the heat insulation structure part 40 which consists of the steel cover 45 which contacts steel materials together, the 1st heat insulation material 46 protects the holding | maintenance part main body 39 from high heat, The impact load can be taken out by this.

Next, the holding arm which concerns on other embodiment of this invention is described. The holding arm which concerns on this embodiment is equipped with the heat insulation structure part 41 as shown in FIG. 12 instead of the heat insulation structure part 40 as shown in FIG. 11 in embodiment mentioned above.

That is, the heat insulation structure part 41 is the 1st heat insulating material 46 which covers the side which contacts the steel material of the holding part main body 39, the forced cover 45 of the U-shaped cross section which covers the 1st heat insulating material 46, It is provided with the 2nd heat insulating material 47 which adheres to the upper and lower surfaces of the ceiling part of the steel cover 45, and has elasticity which contacts a steel material. In addition, while the steel cover 45 is attached to the holding part main body 39 by welding, the projection 48 is formed in predetermined space | interval at the lower surface of the ceiling part of the steel cover 45, and the 1st heat insulating material ( Positioning is achieved by inserting the projection 48 into the hole formed in the 46 and the second heat insulating material 47.

Here, the first insulator 46, as the porous material, fiber material, plastic material for the main ingredient of a heat-resistant inorganic material such as oxide-based ceramic, Al ₂ O _3, SiO _2, a heat insulating material for the main raw material for ZrO _2, etc. . This 1st heat insulating material 46 has high heat insulation, and can hold | maintain the holding part main body 39 from high heat. However, since the 1st heat insulating material 46 is comparatively hard and fragile, it is easy to be damaged by an impact load, and while covering with the steel cover 45, the 2nd heat insulating material which has the elasticity to the steel cover 45 further. The 47 is bonded and the impact cover is received by the forced cover 45 and the second heat insulating material 47. In addition, since the second heat insulating material 47 is in contact with the steel, local cooling of the steel is also prevented. In addition, the 2nd heat insulating material 47 is a cloth-shaped heat resistant material which woven carbon fiber, organic fiber, etc. as heat resistant fiber. For reinforcement, woven fabrics in which metal fibers such as stainless steel fibers are woven and composited are preferable for this use because they are rich in elasticity and have moderate strength. In addition, as a heat resistant organic fiber, carbon fiber, a para aramid fiber, a meta aramid fiber, etc. can be used.

As mentioned above, in this embodiment, the holding part 33a covers the 1st heat insulating material 46 which has high heat insulation which covers the side which contacts the steel materials of the holding part main body 39, and the 1st heat insulating material 46. Since it is provided with the steel cover 45 and the heat insulation structure part 41 which consists of the 2nd heat insulating material 47 which adheres to the steel cover 45 and has elasticity which contacts steel materials, it is made by the 1st heat insulating material 46 The holding part main body 39 is protected from high heat, and the impact load can be taken out by the forced cover 45 and the second heat insulating material 47. Moreover, local cooling of the steel material hold | maintained by the 2nd heat insulating material 47 can also be prevented.

In said embodiment, although the case where a cover was used for the cover and the case where the cover and the 2nd heat insulating material which have elasticity were used, only the 2nd heat insulating material which has elasticity to a cover can also be used. That is, you may arrange | position a 2nd heat insulating material which has elasticity directly on an upper part of a 1st heat insulating material, receives a shock load with a 2nd heat insulating material, and may prevent local cooling of steel materials.

And the holding device 1 of the steel provided with the holding arms 33 of each above-mentioned embodiment operates the electric cylinder 22, as shown in FIG. 5, when performing overtaking etc., The steel material 10 is mounted on the holding part 33a of the holding arm 33, and is lifted up and hold | maintained from the table roller 12 to the height which a following steel material can pass.

Therefore, in the hot rolling facility of steel materials, the steel material holding apparatus 1 which concerns on this embodiment is provided in the upstream or downstream of a hot rolling mill, and the steel material which requires a cooling atmosphere is made into a predetermined thickness with a hot rolling mill. After rolling, the steel is held in a place where subsequent steel can pass in the holding apparatus 1, and the steel that does not require a subsequent cooling atmosphere is rolled by a hot rolling mill while the waiting steel is conveyed to a transfer table. (11) Returning to the phase and rolling to a hot rolling mill subsequent to the subsequent steel, it is possible to avoid the occurrence of the free time due to the cooling atmosphere in the hot rolling mill, and also the temperature non-uniformity of the steel waiting in the cooling atmosphere. Since it is suppressed, stable steel materials, such as shape precision and a material, can be manufactured efficiently.

In addition, although the case where the metal material is steel is demonstrated here as an example, this invention is not limited to this, It is applicable also when a metal material is nonferrous metal materials, such as aluminum.

One embodiment of this invention is described based on drawing. The case where a rolled material is a steel material is described as an example. It is a figure which shows the layout of the hot rolling installation which concerns on one Embodiment of this invention, and the procedure of the hot rolling method using the hot rolling installation. In FIG. 14, 51 is a heating furnace, 52 is a holding apparatus as a standby apparatus, 53 is a reversible hot rolling mill, 54 is a water cooling apparatus.

Here, the holding | maintenance apparatus 52 is installed in the upstream of the reversible hot rolling mill 53, lifts and maintains a high temperature rolling material to the height which a subsequent rolling material can pass from a conveyance table top, and becomes predetermined temperature. To wait until. Moreover, the water-cooling apparatus 54 is provided in the downstream of the reversible hot rolling mill 53, and is for cooling a hot rolled material to predetermined temperature.

In addition, when rolling a control rolling material in the reversible hot rolling mill 53, rolling from slab thickness to control rolling start plate thickness is called rough rolling, and finish plate thickness (plate after finishing rolling) is referred to as rough rolling. The rolling up to thickness) will be referred to as finish rolling.

And using these hot rolling facilities, rolling of 2 control rolling materials (1st slab (A), 2nd slab (B)) and 1 normal rolling material (3rd slab (C)) is performed. In the case of (1)? This is carried out in the order of (6). Here, the control rolling material is given as an example of the steel which needs a cooling atmosphere, and a rolling material is given as an example of the steel which does not require a cooling atmosphere normally.

(1) The 1st slab A extracted from the heating furnace 51 is conveyed on the conveyance table, and it passes through the holding apparatus 52 as it is, and is sent to the reversible hot rolling mill 53. As shown in FIG. And rough rolling is performed by the reversible hot rolling mill 53.

(2) Subsequently, substantially in synchronization with the progress of the rough rolling of the first slab A in the reversible hot rolling mill 53, the second slab B is extracted from the heating furnace 51, and the holding device 52 ) Is passed through as it is and arrives at the reversible hot rolling mill 53 at the end of the rough rolling of the first slab A. The 1st slab A in which rough rolling is complete | finished is sent to the water cooling apparatus 54, and temperature-controlled cooling is carried out to the predetermined temperature range suitable for finishing rolling. In the meantime, the second slab B is roughly rolled by the reversible hot rolling mill 53.

(3) And when rough rolling of the 2nd slab B is complete | finished, this 2nd slab B will be sent to the holding | maintenance apparatus 52, lifted from the conveyance table, and temperature-controlled cooling to the temperature which can be controlled-rolled. This is disclosed. At this time, the temperature adjustment cooling in the water cooling apparatus 54 is complete | finished, the 1st slab A is back-fed, and is finish-rolled by the reversible hot rolling mill 53. As shown in FIG.

(4) And when finish rolling of 1st slab A is complete | finished, 1st slab A will pass through the water cooling apparatus 54 as it is, and will be sent to a subsequent correction process.

(5) Next, while finishing rolling of the first slab A is in progress, the third slab C is extracted from the heating furnace 51 and the second slab B lifted up to the holding device 52. Is passed to the reversible hot rolling mill 53. When the finish rolling of the first slab A is completed and the rolling of the third slab C is started and the rolling of the third slab C is finished, the third slab C turns off the water cooling device 54. It passes as it is and is sent to a later correction process.

(6) And when rolling of 3rd slab C is complete | finished, the 2nd slab B lifted by the holding device 52 will be returned to a conveyance table, and a 2nd slab B will be reversible hot rolling mill. It sends to 53 and rolls to finish plate thickness. When the finish rolling of the second slab B is finished, the second slab B passes through the water cooling device 54 as it is and is sent to a subsequent correction step.

Thus, in this embodiment, when rolling the control rolled material 2 and the ordinary rolled material 1 sheet which require a cooling atmosphere, the overtaking rolling using the cooling and holding apparatus 52 by the cooling device 4 is carried out. In combination with each other, the empty time of the reversible hot rolling mill 53 can be further reduced, and the number of rolled materials to be rolled can be increased, and the rolling efficiency can be further improved.

In addition, in this embodiment, the holding apparatus which lifts and holds a rolling material to the height which a subsequent rolling material can pass from the conveyance table on as a waiting apparatus of a rolling material is used. This is because if it is such a holding apparatus, it is easy to move a rolled material from a conveyance table top, or to return a rolled material to a conveyance table top, but this invention is not limited to it, For example, a rolled material is conveyed on a conveyance table top. It is also possible to use a transverse waiting apparatus which moves laterally from the side to allow the subsequent rolled material to pass therethrough.

One embodiment of this invention is described based on drawing. The case where a rolled material is a steel material is described as an example. It is a figure which shows the procedure of the layout of the hot rolling equipment which concerns on one Embodiment of this invention, and the manufacturing method of the steel materials using this hot rolling equipment. In Fig. 15, 51 is a heating furnace, 54 is a water cooling device, 52 is a holding device as a standby device, and 53 is a reversible hot rolling mill.

Here, the holding | maintenance apparatus 52 is installed in the upstream of the reversible hot rolling mill 53, and lifts the high temperature steel rolled to predetermined | prescribed plate | board thickness to the height which a subsequent steel material can pass through on a conveyance table. To maintain and to stand by. Moreover, the water cooling apparatus 54 is provided in the upstream of the holding | maintenance apparatus 52, and is for cooling a high temperature steel material. And the water cooling apparatus 54 and the holding | maintenance apparatus 52 are equipped with the thermometers 55 and 56, respectively, in order to measure the temperature of steel materials.

When rolling by combining a control rolling material (1st slab (A)) and a normal rolling material (2nd slab (B)) using such a hot rolling facility, it is as follows (1)? Rolling is performed according to the procedure of (6). Here, the control rolling material is given as an example of the steel which needs a cooling atmosphere, and a rolling material is given as an example of the steel which does not require a cooling atmosphere normally.

In addition, when rolling a control rolling material in the reversible hot rolling mill 53, rolling from slab thickness (for example, 215 mm) to control rolling start plate thickness (for example, 80 mm) is called rough rolling. The rolling from the controlled rolling start plate thickness to the finished plate thickness (plate thickness after finish rolling) is referred to as finish rolling.

(1) The 1st slab A heated at the predetermined temperature (for example, 1150 degreeC) in the heating furnace 51 is conveyed on the conveyance table, and passes through the water cooling apparatus 54 and the holding apparatus 52 as it is, It is sent to the reversible hot rolling mill 53. And rough rolling is performed by the reversible hot rolling mill 53.

(2) The 1st slab A in which rough rolling was complete | finished is conveyed to the holding apparatus 52, and is lifted and hold | maintained upwards on the conveyance table by the holding apparatus 52, and is hold | maintained.

(3) Then, in accordance with the progress of the rough rolling of the first slab A in the reversible hot rolling mill 53, the second slab B is extracted from the heating furnace 51 to leave the water cooling device 54 as it is. It passes and passes the 1st slab A just after hold | maintained by the holding | maintenance device 52, and arrives at the reversible hot rolling mill 53. As shown in FIG.

(4) After the 2nd slab B which arrived at the reversible hot rolling mill 53 was rolled to predetermined | prescribed finishing plate thickness, it is sent to a correction process.

(5) On the other hand, the 1st slab A hold | maintained by the holding | maintenance apparatus 52 is returned on the conveyance table during rolling of the 2nd slab B, is conveyed to the water cooling apparatus 54, and it is made to predetermined temperature. Is cooled. At that time, when the rolling of the second slab B is finished, the air cooling time on the holding device 52 and the conveying table and the water cooling device 54 so that the finish rolling of the first slab A can be immediately started. Adjust the water cooling time.

That is, while holding the 1st slab A in the holding device 52, the temperature of the 1st slab A is measured by the thermometer 56, and based on the measurement result of a 2nd slab B At the rolling end prediction time, the water cooling start time and the water cooling end time in the water cooling apparatus 54 are set so that the temperature of the 1st slab A becomes the temperature which can be controlled rolling (for example, 850 degreeC). And based on the setting, 1st slab A is conveyed to the water cooling apparatus 54, and water cooling is performed. In addition, the temperature of the 1st slab A before water cooling start is measured with the thermometer 55 of the water cooling device 54 as needed, and based on the measurement result, the water cooling start time in the water cooling device 54, and Reset the end time of water cooling.

(6) And the 1st slab A in which the water cooling in the water cooling apparatus 54 was complete | finished is conveyed to the reversible hot rolling mill 53, and is finish-rolled following the completion | finish of rolling of the 2nd slab B. After that, it is sent to the correction process.

Thus, in this embodiment, in accordance with the rolling end time of subsequent steel materials, since the control rolling material waited by the holding apparatus 52 can be cooled by the water cooling apparatus 54 so that it may become predetermined temperature at predetermined time, The reversible hot rolling mill 53 can be rolled without rain, for example, the conventional 1.5 times the rolling efficiency can be obtained.

In addition, in this embodiment, although it arrange | positions in the order of the water cooling apparatus 54, the holding | maintenance apparatus 52, and the reversible hot rolling mill 53 from an upstream, the holding apparatus 52, the water cooling apparatus 54, and reversibility You may arrange in the order of the type | formula hot rolling mill 53. FIG.

Moreover, in this embodiment, although the holding apparatus which lifts and holds a steel material from the conveyance table to the height which a following steel material can pass through is used as a standby apparatus of steel materials, this invention is not limited to it, For example, you may use the horizontally movable standby apparatus which moves a steel material to the horizontal direction from a conveyance table, and allows a subsequent steel material to pass. As a holding device which lifts and holds the steel from the conveying table to a height through which the subsequent steel can pass, the moving device is moved from the conveying table or the steel is returned to the conveying table. It is easy to do this, and since it is rich in responsiveness, it is preferable.

One embodiment of this invention is described based on drawing. It is a figure which shows the layout of the hot rolling installation which concerns on one Embodiment of this invention, and the procedure of the hot rolling method of the steel material using the hot rolling installation.

As shown in FIG. 16, the hot rolling equipment which concerns on this embodiment is the heating furnace 51, the 1st water cooling apparatus (front water cooling apparatus) 54, and the holding apparatus 52 as a standby apparatus in order from an upstream side. And a reversible hot rolling mill 53 and a second water cooling device (rear water cooling device) 57.

Here, the holding | maintenance apparatus 52 provided in the upstream of the reversible hot rolling mill 53 lifts and holds a high temperature rolling material to the height which a subsequent rolling material can pass from a conveyance table top, and the predetermined temperature is It is to air-cool until waiting. Moreover, the front water cooling apparatus 54 provided upstream of the holding | maintenance apparatus 52, and the back water cooling apparatus 57 provided downstream of the reversible hot rolling mill 53, respectively, make hot rolling material to predetermined temperature. It is for cooling.

And the front water cooling apparatus 54, the holding | maintenance apparatus 52, and the back water cooling apparatus 57 are provided with the thermometers 55, 56, 58 for measuring the temperature of a rolling material, respectively.

And when using these hot rolling facilities, the rolling of two control rolling materials (1st slab (A), 3rd slab (C)) and 1 normal rolling material (2nd slab (B)) is performed. (1) has the following? This is carried out in the order of (6). Here, the control rolling material is given as an example of the steel which needs a cooling atmosphere, and a rolling material is given as an example of the steel which does not require a cooling atmosphere normally.

In addition, here, when rolling a control rolling material in the reversible hot rolling mill 53, rolling from slab thickness (for example, 215 mm) to control rolling start plate thickness (for example, 80 mm) is carried out. It is called rough rolling, and rolling from control thickness starting plate thickness to finishing plate thickness (plate thickness after finishing rolling) is called finish rolling.

(1) The 1st slab A heated at the predetermined temperature (for example, 1150 degreeC) in the heating furnace 51 is conveyed on the conveyance table, and passes the front water cooling apparatus 54 and the holding apparatus 52 as it is. It is sent to the reversible hot rolling mill 53, and rough rolling of the 1st slab A is performed by the reversible hot rolling mill 53. As shown in FIG.

(2) The 1st slab A which finished rough rolling is sent to the holding apparatus 52, and is lifted and hold | maintained from the conveyance table by the holding apparatus 52. FIG.

(3) Then, in accordance with the progress of the rough rolling of the first slab A in the reversible hot rolling mill 53, the second slab B is extracted from the heating furnace 51, and the front surface water cooling apparatus 54 is removed. Passing as it is, it passes over the 1st slab A lifted by the holding device 52, and is sent to the reversible hot rolling mill 53. As shown in FIG.

(4) After the 2nd slab B sent to the reversible hot rolling mill 53 is rolled to predetermined | prescribed finishing plate thickness, it passes through the back water cooling apparatus 57 as it is, and is sent to a correction process.

(5) On the other hand, the 1st slab A hold | maintained by the holding | maintenance apparatus 52 is returned on the conveyance table during rolling of the 2nd slab B, is sent to the front surface water cooling apparatus 54, and is made to predetermined temperature. Is cooled. At that time, when the rolling of the second slab B is finished, the air cooling time and the front surface water cooling device 54 on the holding device 52 and the conveying table can immediately start the finish rolling of the first slab A. The water cooling time at is adjusted. Here, even if water is cooled by the front surface water cooling apparatus 54 until the rolling end prediction time of the second slab B, the temperature at which the temperature of the first slab A can be controlled and rolled (for example, For example, after being cooled to 850 ° C., the first slab A is water-cooled with the front water cooling device 54 until the rolling end time of the second slab B, and then (6), (to be described later) As shown to 8) and (9), it cools to the temperature which can be controlled-rolled by the back surface water cooling apparatus 57. In addition, as needed, the temperature of the 1st slab A is measured with the thermometer 56 and the thermometer 55, and the water cooling time required to cool to the temperature which can be rolled control based on the measurement result is confirmed again. .

(6) Then, the second slab (B) is rolled to a predetermined finish plate thickness, and the water cooled by the front water cooling device (54) in accordance with passing through the back water cooling device (57) as it is and sent to the correction process. One slab A passes through the reversible hot rolling mill 53 as it is, and is sent to the back surface water cooling apparatus 57.

(7) Then, in the meantime, the 3rd slab C is extracted from the heating furnace 51, and it passes through the front water cooling apparatus 54 and the holding apparatus 52 as it is, and is sent to the reversible hot rolling mill 53. . And after 3rd slab C is rolled to predetermined | prescribed plate | board thickness with the reversible hot rolling mill 53, it is conveyed to the upstream side of the reversible hot rolling mill 53, is sent to the front surface water cooling apparatus 54, and is cooled by water.

(8) On the other hand, the 1st slab A sent to the back surface water cooling apparatus 57 can start finish rolling of a 1st slab A immediately, if the 3rd slab C is rolled to predetermined plate | board thickness. The water cooling time in the rear water cooling device 57 is set so that the temperature of the third slab C is measured by the thermometer 58 as necessary, and the water cooling time is adjusted based on the measurement result.

(9) And the 1st slab A cooled to the temperature which can be controlled-rolled by the water cooling in the back surface water cooling apparatus 57, the 3rd slab C is an upstream side of the reversible hot rolling mill 53. It is sent to the reversible hot rolling mill 53 and rolled to predetermined | prescribed plate | board thickness in accordance with conveyance, and it passes through the back water cooling apparatus 57 as it is, and is sent to a correction process.

(10) Subsequently, after the third slab C sent to the front water cooling apparatus 54 and cooled to a predetermined temperature is sent to the reversible hot rolling mill 53 and rolled to a predetermined plate thickness, the rear water cooling apparatus 57 ) Is passed through as it is and sent to the correction process.

Thus, in this embodiment, when rolling the control rolled material 2 and the normal rolled material 1 sheet which require a cooling atmosphere, the cooling by the front side cooling apparatus 54 and the back side cooling apparatus 57, Since the overtaking rolling using the holding | maintenance apparatus 52 is combined suitably, the empty time of the reversible hot rolling mill 53 can be further reduced, the number of the rolling materials rolled can be increased, and rolling efficiency can be improved further. have.

In this embodiment, the heating furnace 51, the front water cooling device 54, the holding device 52, the reversible hot rolling mill 53, and the rear water cooling device 57 are provided in order from the upstream side. You may provide in order of the heating furnace 51, the holding | maintenance apparatus 52, the front water cooling apparatus 54, the reversible hot rolling mill 53, and the back water cooling apparatus 57. FIG.

Moreover, in this embodiment, the holding | maintenance apparatus which lifts and holds a rolling material to the height which a following rolling material can pass from a conveyance table on as a waiting apparatus of a rolling material is used. This is because if it is such a holding apparatus, it is easy to move a rolled material from a conveyance table top, or to return a rolled material to a conveyance table top. It is also possible to use a laterally moving atmospheric apparatus that moves laterally from the side to allow subsequent rolled material to pass therethrough.

In addition, in this embodiment, although the case where the rolled material is steel was demonstrated as an example, this invention is not limited to this, It is applicable also when a rolled material is nonferrous metal materials, such as aluminum.

The meanings of the reference numerals are as follows.
1 steel holding device, 2 steel holding device, 5 hot rolling mill, 10 steel, 10a leading material, 10b trailing material, 11 conveying table, 12 table roller, 13 apron, 14 apron, 21 prop, 22 electric cylinder , 23 motors, 24 rotary transmission shafts, 25 mounts, 26 hydraulic cylinders, 31 transverse frames, 32 vertical frames, 33 retaining arms, 33a retainer, 33b lower part, 39 retainer body, 40 insulated structure, 41 insulated structure, 45 Steel cover, 46 first insulation, 47 second insulation, 48 projections, 51 furnace, 52 holding device, 53 reversible hot rolling mill, 54 water cooling device, 55 thermometer, 56 thermometer, 57 rear water cooling device, 58 thermometer

Claims (15)

In a hot rolling facility, as a holding device of the rolling material for lifting and holding a rolling material upwards from a conveyance table top,
An elevating frame arranged to elevate above the conveying table,
In order to hold a rolled material from both sides of a conveyance table, it is equipped with the some holding arm formed in the said lifting frame,
The holding arm has a holding part that can be engaged with the lower surface of the rolled material by the lifting of the lifting frame,
The holding portion is mounted with a metal material, and the holding portion has a holding portion main body, a first heat insulating material covering a side in contact with at least a metal material of the holding portion main body, and a cover which contacts the metal material while covering the first heat insulating material. The holding apparatus of the rolling material characterized by the above-mentioned. The method of claim 1,
The lifting frame is supported so as to be able to lift and lower on the supports provided on both sides of the conveying table. The method of claim 1,
The lifting frame is held so that the lifting frame can be lifted and lowered on a mount provided above the conveying table. The method according to any one of claims 1 to 3,
The holding arm is provided with the lower part which hangs down from a lifting frame, and the holding part extended in the conveyance table width center direction from the lower end of this lower part. The rolling material holding device characterized by the above-mentioned. A rolling table consisting of a hot rolling mill, a plurality of table rollers for conveying the rolled material to the hot rolling mill, and an apron provided at a gap between the respective table rollers, and a rolling material lifted from the conveying table on an upstream side of the hot rolling mill. A hot rolling facility having a holding device for holding,
As a holding device, the holding device of the rolling material as described in any one of Claims 1-3 is provided,
The holding part of the holding arm of the holding device is disposed in the gap between the table rollers, and an apron is provided in the gap between the table rollers other than the portion where the holding part is lifted and raised. As a manufacturing method of the metal material using the hot rolling facility of Claim 5,
After the metal material is rolled to a predetermined thickness by the hot rolling mill, the metal material is waited at a place where a subsequent metal material can pass through the holding device, the subsequent metal material is rolled by the hot rolling mill while conveying the waiting metal material. The method for producing a metal material, which is returned on a table and rolled with the hot rolling mill following the subsequent metal material. A holding arm for use in lifting a high temperature metal material, comprising a holding part for mounting a metal material, the holding part having a holding part main body, a first heat insulating material covering a side in contact with at least a metal material of the holding part main body, A holding arm for a metal material, comprising: a cover covering the heat insulating material and in contact with the metal material. The method of claim 7, wherein
A holding arm for a metal material, wherein the cover in contact with the metal material is a metal cover. The method of claim 7, wherein
The cover which contacts the said metal material is equipped with the metal cover which covers a 1st heat insulating material, and the 2nd heat insulating material which is attached to the upper surface of this metal cover, and has elasticity which contacts a metal material, The metal holding arm characterized by the above-mentioned. 10. The method according to any one of claims 7 to 9,
The holding arm is provided with the lower part which hangs downward, and the holding part extended in the horizontal direction from the lower end of the lower part. As a holding | maintenance apparatus of the metal material which lifts and holds a metal material upwards on a conveyance table,
The lifting frame arrange | positioned so that it can elevate above a conveyance table, and the holding arm of the metal material as described in any one of Claims 7-9 formed in the said lifting frame in order to hold | maintain a metal material from both sides of a conveyance table are provided. And the holding part of the holding arm pushes up the lower surface of the metal material by the lifting of the lifting frame. The hot rolling installation provided with the holding device of Claim 11 in the upstream or downstream of a hot rolling mill. As a manufacturing method of a metal material using the hot rolling facility of Claim 12,
After the metal material is rolled to a predetermined thickness by the hot rolling mill, the metal material is waited at a place where a subsequent metal material can pass through the holding device, the subsequent metal material is rolled by the hot rolling mill while conveying the waiting metal material. The method for producing a metal material, which is returned on a table and rolled with the hot rolling mill following the subsequent metal material. A rolling table consisting of a hot rolling mill, a plurality of table rollers for conveying the rolled material to the hot rolling mill, and an apron provided at a gap between the respective table rollers, and a rolling material lifted from the conveying table on an upstream side of the hot rolling mill. A hot rolling facility having a holding device for holding,
As a holding apparatus, the holding apparatus of the rolling material of Claim 4 is provided,
The holding part of the holding arm of the holding device is disposed in the gap between the table rollers, and an apron is provided in the gap between the table rollers other than the portion where the holding part is lifted and raised. As a holding | maintenance apparatus of the metal material which lifts and holds a metal material upwards on a conveyance table,
And a holding frame of the plurality of metal materials according to claim 10 formed on the lifting frame so as to hold the lifting frame arranged so that the lifting table can move up and down, and the metal material on both sides of the lifting table. A metallic holding device, wherein the lower surface of the metallic material is pushed up by the lifting of the lifting frame.

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