JPS5992114A - Reheater for both-side edge section of hot roll metallic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a side edge reheating device.

When continuously hot rolling a metal plate, such as a steel plate, steel strip, or steel slab, the steel plate to be rolled heated to the rolling temperature is fed to a rolling mill, and is continuously rolled by rolling rolls. In this case, the contact-rolled steel plate is cooled from its feeding point until it reaches the rolling rolls, and generally both edges of the sheet are cooled more strongly than the center. 1!l The temperature of the M part may drop below the appropriate rolling τ111N degrees, which may cause uneven properties in the width direction of the rolled product steel plate or cause undue wear on the rolling rolls. It is known that this can lead to various difficulties, such as the need to carry out the research calendar at an early stage.

In order to eliminate such problems, induction heating devices are installed on both sides of the feeding path from the feeding point of the steel plate to the rolling rolls to reheat both side edge portions of the steel plate. It is conceivable to pass each side edge of the rolled sheet steel between the magnetic poles of the device arranged there, and to reheat each side edge by induction.

In this case, generally, for example, a transverse flux induction method or a channel coil method may be used, but in the case of a transverse method, the magnetic poles are multi-pole HTR crushed, so the structure is The collapse becomes complicated, and due to its characteristics, there are restrictions on coil design. On the other hand, in the case of the channel coil method, there is a decisive drawback in that it cannot cope with changes in the thickness of the metal plate to be heated, for example, a steel plate.

The original purpose of this heating is for the steel plate to reach approximately the lowest temperature at the end of its side edges, and to
It is ideal to draw a heating curve that smoothly decreases, but in the case of induction heating, the current is concentrated in the part of the rolled metal plate that corresponds to the coil part, so Of the two methods mentioned above, the channel coil method can obtain temperature characteristics with an almost ideal temperature distribution, but it has the decisive drawbacks mentioned above, and in the case of the transverse method, , there is a problem that a peak portion with a lower temperature appears adjacent to this highest temperature portion.

The present invention solves the above-mentioned difficulties in the commonly considered heating methods, and provides an IS method for rolling both side edges of metal plates, metal strips, or slabs to be hot-rolled of various dimensions.
Old lesson 4 to be efficient in il and even in the width direction *, =
．． ='! The purpose of this is to find out the equipment needed to do this.

In order to achieve the object, the device u of the present invention has seven pairs of carts disposed on a foundation so as to be movable in a direction perpendicular to the feeding direction of the rolled metal plate, and each of the carts has a The magnetic poles of at least seven pairs of U-shaped inductors for induction heating are arranged facing each other so as to surround each side edge portion of the rolled metal plate at intervals from above and below, and these magnetic poles are connected by an induction coil. It is characterized in that it is capable of being excited, and that at least one of the magnets is arranged so as to be movable relative to the side edge portion of the rolled metal plate in the vertical direction.

The present invention will be described below with accompanying drawings showing examples of the device.
/~The explanation will be based on diagram S.

First, FIG. 1 shows an overall perspective view of an embodiment of the device of the present invention, and as shown in the figure, a pair of rails are installed horizontally and in parallel on a foundation F. , /2, two bogies J, , , 2° are disposed facing each other so as to run freely via wheels 3 rotatably attached to each.

On base #F, a threaded rod is rotatably supported via several bearing blockers in close proximity to, parallel to, and slightly above one of the rails. , this threaded rod S is installed at its end above the foundation F.
It can be driven in either forward or reverse directions by a motor 7 through a reduced speed reduction mechanism 6. Furthermore, each trolley mountain.

In λ, the connecting members g, g2, which are attached to each other with one hook, are threadedly engaged with the threaded rod t, and the threaded rod t has a male thread formed thereon at the center in the longitudinal direction. In,
Each bogie stone 1.2. shall have a left-hand thread and a right-hand thread in opposite directions, respectively. Connecting members g, , g are also formed with internal threads having corresponding left-hand threads and right-hand threads in opposite directions, so that when the threaded rod rotates, each bogie stone is connected according to the direction of rotation. .

λ2 can be moved toward or away from each other via the connecting members A+, g2.

Also, each trolley: 11. An emergency retraction cylinder hole, Te, is fixed to λ2, and its piston rod/θIn70
Connecting members g, , g, are fixed to the free end portions of 1, respectively. Note that the pistons (not shown) of each cylinder 91*91 are normally connected to cylinders 9+ + 9.
The connecting member g,
, g, for each bogie 1. However, when cylinder ql+92 is activated, one carriage 21+22 is connected to connecting member g,,g: Q! (In this case, the cylinder can be moved rapidly. In this case, the driving sources for the cylinder are: - pneumatic type, mechanical type,
Any type, such as a hydraulic type, can be suitably applied.

Also, each trolley u, , , 2. , λ sets of U-shaped inductors -〇, λ/ are arranged on their opposing sides (hereinafter referred to as front side 1), and fixed yokes of 20 mm are installed at the upper and lower parts of each inductor. , λ/mu, and 20B, 2/B are arranged in parallel at intervals so as to face each other, and are fixed to each other by a vertical yoke connecting them. In this case, the upper yoke of each inductor unit o, :1i, 20mm 1.2/mu, is:
The horizontal length of the lower yoke is shorter than that of the lower yoke OB and U/B, and instead, each yoke θ has a thickness corresponding to the difference in length, and A moving laminated magnetic pole -θQ, ,2 having a width corresponding to the width of ,2/A and a certain height.
/Q, upper yoke, 20. ．． The movable laminated magnetic poles 20Q, 2IQ are arranged so as to be movable relative to the end face of the upper yoke OA9. When placed in contact with the free end of the lower yoke, the free surface of the lower yoke, 20B
, 27B, that is, in substantially the same plane as the pole tip face (see FIG. 2). In addition, each inductor -〇.

Induction coils [theta]1) and -/D are wound around the vertical yoke part of /. Also, moving laminated magnetic pole 2oυ.

The lower surface of the lower yoke 10 and the upper surface of the magnetic poles of the lower yokes λθB, 2/B have a single-plane monopolar structure. For these fixed yokes and moving magnetic poles, if necessary, water-cooled copper plates can be inserted between the laminated plates. is affected by high heat, so it is necessary to perform heat insulation treatment.

Furthermore, in order to enable relative movement of such moving laminated magnetic poles -〇〇, λ10 with respect to the upper yoke, 20mm, 2/mm, each carriage λ0, 2. (The upper part of the front part <2r
A,=hm/pair of suspension members J2. ．． Fix 23,
The suspension members 2λ, 23 include a suspension element 2 that can be driven in the vertical direction.
λ,,23. Install each.

The moving laminated magnetic poles 20Q and 2/Q are pivotally attached to the lower ends thereof, respectively, and the moving laminated magnetic poles 20Q and 2/Q are caused to move up and down by the operation of the suspension members 2λ and 3.

In addition, as a driving source for this suspension member-1.2J, an electric type, a mechanical type, a hydraulic type, etc. can be applied.

Also, each trolley 1. On the vertical rear wall of λ, +B+, 2mB, there are l pairs of moving laminated magnetic pole clamp cylinders λF, respectively.
, 25 horizontally at its cylinder end;
At the end of the piston rod, the moving laminated magnetic pole λOQ, 2 /Q is attached to its holding member.

, 25t. In this way, by the operation of the moving laminated magnetic pole clamp cylinders 24', 25, the moving laminated magnetic poles -〇Q, 2/Q are moved to the upper magnetic pole comb O1.
．． It can be moved horizontally relative to 2/mu. In addition, this move! llI] Fluid pressure or the like is suitable as a driving source for the laminated magnetic pole clamp cylinders y and ko.

Also, each platform λ1, 2. On the opposite front side of the inductor, adjacent to the inductor, 2o, co/, its lower yoke, l OB
, , 2 /l and moving laminated magnetic pole - 〇Q, Slightly rearward from the free end surface of J10, seven pairs of wire guide roll rollers are arranged vertically as shown in Figures 3 and 3 to enable free rotation. It is. Note that the installation position is determined according to the heating width of the side edge SO of the steel plate to be rolled 50, but it is possible to change the position IU according to the heating width, for example, with the roll co The inductor is made of a membrane so that its relative position with respect to the inductors 〇 and 2/ can be adjusted.

Although the embodiment of the present invention breaks down the 4C configuration as described above, its operation will be explained next assuming that it is rolling a steel plate.

As shown in FIG. 7, in order to roll the rolled steel sheet SO heated to the rolling temperature, the rolled steel sheet SO is guided from the supply point to rolling rolls (none of which are shown) in the direction of arrow X. It is assumed that the rolled steel plate 50 is continuously moving at high speed over the roll S/, and the apparatus of the present invention reheats both side edges SO of the rolled steel plate 50 while the rolled steel plate 50 is moving. Prior to rolling the steel plate SO, the inductor 20. is arranged at a distance between the two carriages -+1Jt according to its dimensions. The position of the / must be set in advance to the optimum position.

For this purpose, by driving the motor 7, the threaded rod q is rotated in an appropriate direction via the deceleration drive mechanism A.
Connecting member g11 st and emergency retraction cylinder q, q
, I2. At the same time, you can move closer or further away. As a result, both machines j1. −21 +
each opposing inductor fixed on 21; 20. ．． Since the interval 21 is also changed at the same time, the interval is set to the optimum dimension for the width of the rolled steel plate SO.

Next, inductor 20. ．． 1/lower fixed yoke λ1
Moving laminated magnetic poles 20Q, 2/Q for 17B, 27B
In order to set ! to the optimal position relative to the thickness of the rolled steel plate SO, first move the moving laminated magnetic pole clamp cylinders l, 2!
The moving laminated magnetic poles -〇G, ``O'' are moved forward away from the upper fixed yoke, 20mm, 2/mu by the actuation of f, and then the moving laminated magnetic poles are moved forward by the actuation of the suspension members -1 and λ3. 20Q, 2/Q are adjusted vertically to appropriate positions, and the moving laminated magnetic pole xOor/, is moved to the upper fixed yoke λθ^ by the operation of the moving laminated magnetic pole clamp cylinder, 21.S.

2/Make sure to firmly bond the parts. In this way,
The optimum clearance is established between the lower surfaces of the upward and moving laminated magnetic poles λ'01-210 of the lower fixed yoke, 2013, 2/f3, and the lower and upper surfaces of the rolled steel plate 5°, for example, each λ□ tn
m is secured, rolled steel &3o are these yoke oB,
U/B magnetic poles and moving laminated magnetic poles OQ.

, 210 (each side edge Sθ,).

The upper and lower magnetic poles 20Q, 2/Q, 2 where SO2 is magnetized by the energization of the induction coils λθD, 2/D
0B and 2/B, it is continuously induced and reheated to a predetermined temperature.

In this case, the edge guide roll λB is
O is always in contact with each side edge 5θ1 of O, and the relative position of the side edge 301 of the rolled steel plate 50 with the magnetic poles θB+, 2/B and θ0n210 is always kept constant.Thus, both side edges left O8 to obtain an ideal temperature distribution. Furthermore, if the tip and/or rear end of the moving rolled steel plate jθ has an upward or downward bend, the heating device should be A bend detection device (not shown) is provided at an appropriate position, and the degree of bend is determined by preset magnetic poles 20B, 20B,
If the clearance between B and Yu Oo, Yu/, and the rolled steel plate so is exceeded, the emergency retraction cylinder 91 + '2
Due to the operation of both bogies λ1. -2 are simultaneously rapidly withdrawn from the rolled steel sheet SO at a high speed, e.g. 2/ Prevent accidental damage. In this case, the leading end and/or trailing end of the rolled steel plate 50 will not be heated, so in order to minimize this, a bending detection device for the feeding speed of the rolled steel plate SO and a high-speed emergency Retraction cylinder 9I
, Appropriate timing with Wo2 is required.

Next, FIG. It is screwed from a bracket 32 which is fixed horizontally to the tip of the piston rod 3/ of the pair (not shown) to the lower part of a rotary threaded rod 33 which is rotatably installed vertically in the center of the bracket 32. This rotary threaded rod 33 is attached to a motor 34' and a speed reducer 171 which are attached to a bracket 3. The movable laminated magnetic pole JOQ can be moved vertically by driving through the 4f. Note that a pair of guide rods 36 are connected between the magnetic pole 30c and the three brackets.
The movable laminated magnetic pole 300 can be moved up and down smoothly when the rotary screw barrel 33 is rotated. In addition, the moving laminated magnetic pole ao (
4o) The free end face is engaged by a vertical/pair of hooks 32 fixed to the free end of the piston rod 3/.

Although this embodiment is particularly suitable for relatively thick metal plates, it is clear that its operation is similar to that of the previous embodiment.

Since the apparatus of the present invention has the above-described configuration and operation, when hot rolling metal, particularly steel plates, steel strips, steel slabs, etc., the steel to be rolled is transferred from its feeding point to the rolling rolls. During feeding, the temperature of both side edge portions tends to decrease compared to the center portion, so that both side edge portions can be continuously reheated during feeding. It becomes possible to roll the rolled steel material evenly in the width direction, resulting in a homogeneous rolled product.At the same time, the wear of the rolling rolls is also uniform in the length direction, and the period during which re-polishing is required. can be extended significantly. In addition, the upper and lower laminated magnetic poles for reheating the edge portion of the rolled metal can be set at an interval that is optimal for the dimensions of the rolled metal, especially its thickness, and the surface of the rolled metal. Since the surface facing the metal plate has a monopolar structure with a single plane, the heating temperature at the side edge of the metal plate is approximately 1% at the outer side, and then gradually decreases towards the inside. It now exhibits a single heating curve, making it possible to perform rolling evenly in the width direction, and also to freely select the optimal spacing between the upper and lower magnetic poles and the metal plate to be rolled. I can do it. Furthermore, the apparatus of the present invention is characterized in that the power density per unit area of the side edge of the metal plate to be rolled is maintained higher than in the other methods described above, and high electrical efficiency can be obtained. Therefore, the side edges of the rolled metal plate can be reheated economically.

In the above description, as an example of the device of the present invention, one set of inductors is arranged in seven carts in parallel at intervals, but the number of sets of inductors may also be /silk. It is also possible to arrange two or more sets of such carriages in seven rolling lines, or to arrange several pairs of such carriages in the direction of movement of the metal plate to be rolled.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the overall arrangement of an embodiment of the device of the present invention;
FIG. 2 is an enlarged perspective view of the magnetic pole portion. FIG. 3 is a perspective view showing seven examples of the arrangement of side edge guide rolls for rolled metal sheets, FIG. 9 is a front view thereof, and FIG. S is a perspective view showing a modified example of the means for moving the moving laminated magnetic pole. It is. /,,, /,...Rail;λ4.2.・For table;
・Threaded rod: &t+h・・Connection member: '1+92・・Emergency retraction cylinder:, 20, 2/, 3θ・・Inductor: λθ, com/mu, 30m・・Tsuchibe yoke;, 20B9.
2/B. , yoB--lower yoke; sOOe -1/c, J
O(3--moving laminated magnetic pole;, 22. ko3--suspension member;
Cog. , 25...Moving laminated magnetic pole clamp cylinder; 21
... Line guide roll; 3 / ... Piston rod; 5? Ko... bracket l-;,? ,? ...Rotating screw rod;,? 7... Hook: 50... Rolled steel plate; SO,... Side edge. Procedures Urasa Book Showa 5F noon March 2411 Mr. Commissioner of the Patent Office 1, 1JF Display Showa! 7 years Patent Application No. 1?9/, 2 & No. 2, Name of Invention Reheating of Hot Pressed Golden Paulownia Plate for 11 GIi 1 Place 3,
Relationship with the case of person making a mold Special, 1'1 Applicant name: Ajax Magotsumic Corporation No. 10, Agent 5, Subject of pre-emption

Claims (1)

[Scope of Claims] / A pair of carts are arranged facing each other so as to be movable in a direction perpendicular to the feeding direction of the metal plate to be rolled. Both magnetic poles of at least seven pairs of U-shaped inductors for induction heating are arranged to face each other so as to surround the side edge portions at intervals from above and below, and at least one magnetic pole is attached to the side edge portions of the rolled metal plate. 1. A reheating device for a side edge portion of a hot-rolled metal plate, the device being held on a cart so as to be relatively movable in the vertical 1u direction. 2. The reheating device according to claim 1, wherein each magnetic pole has a monopolar structure. 3. Screws having a length that substantially covers the running range of at least two rails installed horizontally at right angles to the feeding direction of the rolled metal plate so that each bogie can run on the foundation. The rod is arranged horizontally so as to be rotatable, and the rod is threadedly engaged with the threaded shank./The pair of connecting members are each connected to each truck,
At least seven pairs of magnetic poles for induction heating are fixedly attached to each truck so as to surround each side line part of the rolled metal plate at intervals from above and below, and in this case, the upper magnetic pole is free to move. The reheating device according to claim 1 or 2, wherein a portion near the jaw portion is movable in substantially horizontal and vertical directions. The magnetic pole part, which is capable of moving the upper magnetic pole, is suspended movably in the approximately 1σ direction by a suspension part mounted on the trolley, and a clamp member fixed horizontally to the trolley. 4. A reheating device according to claim 3, wherein the reheating device is supported movably in a substantially horizontal direction by a movable part. ! The movable magnetic pole part of the upper magnetic pole is screwed to a rotating screw shaft that is a clamp member that is fixed horizontally to the cart, and the bracket is equipped with a motor to drive the rotating screw rod. The reheating device according to claim 3, wherein the hook fixed to the free end portion of the movable portion of the clamp member is capable of engaging with the free end surface of the movable magnetic pole portion. . In the patent claim, the threaded rod is formed with a left-hand male thread and a right-hand male thread in opposite directions with respect to the center portion thereof in the longitudinal direction, and each connecting member is formed with a left-hand female thread and a right-hand female thread in the opposite direction. The reheating device according to any one of the ranges 1 to S. 2. The reheating device according to any one of claims 1 to 4, wherein each truck and the connecting member are connected via an emergency retraction cylinder. Claims 1 to 4 are comprised of at least seven sets of line guide rolls, each of which is rotatably arranged around a vertical axis, and are in contact with each side edge ζ of the rolled metal sheet. The reheating device according to any of RTL.