JPH10137848A - Coil take-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil take-up device provided with the function capable of expanding or contracting the radius of a mandrel with a simple structure. SOLUTION: In this coil take-up device, a mandrel 1 is divided into at least two pieces with a flat surface including the shaft center and divided into two pieces with a flat surface perpendicular to the shaft center, and further provided with segments 3 provided taper surfaces 3t contrasted the radius inward in the width direction of the coil 2 in the inner surface and shafts 4 divided into tow pieces with the flat surface perpendicular to the shaft center and provided taper surfaces 4t along taper surfaces 3t in the outer surface. The radius of segments 3 is contracted along taper surfaces 4t by moving each shaft 4 outward in the width direction of the coil 2, and segments 3 are pulled out of the coil 2 by further moving each shaft 4 outward in the width direction of the coil 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding device in a hot rolling facility.

[0002]

2. Description of the Related Art In a hot rolling facility in which finish rolling is performed after rough rolling, as shown schematically in FIG.
It is rolled to a bar of 0 to 50 mm thickness and then further rolled in a finishing mill to a strip of several mm thickness. in this case,
After rough rolling is completed, the time until finish rolling is completed is long,
There was a problem that the rear end of the bar was lower in temperature than the front end, making uniform finishing difficult. Therefore, as schematically shown in FIG. 5B, a method has been disclosed in which a bar after rough rolling is wound into a coil shape and finish rolling is performed while rewinding the bar. According to this method, the temperature of the entire bar is prevented from lowering, and the finish rolling is performed from the rear end in the rough rolling, so that the temperature difference between the front and rear ends of the bar can be made substantially the same. However, in a hot rolling facility using this method, when a coil winding device and a coil unwinding device are separately provided, it is necessary to transfer the coil from the winding position to the unwinding position. Therefore, when using a coil winding device that winds a bar after rough rolling into a coil shape using a mandrel, it is necessary to remove the mandrel before transferring the coil to the rewind position.

Therefore, it is conceivable to use a mandrel expanding / contracting mechanism of a down coiler as shown in FIG. 4A is a side cross-sectional view of a mandrel used in a downcoiler, and FIG.
FIG. The down coiler is a coil winding device that winds a strip after finish rolling is completed. The coil wound by this down coiler is treated as a product as it is, so as not to scratch or wrinkle,
It is necessary to wind it round and tight. Therefore, even if the mandrel is pulled as it is after winding, it cannot be pulled out. Therefore, as shown in FIG. 4, the mandrel 1 is provided with an expansion / contraction mechanism so that the radius of the mandrel 1 is reduced before the mandrel 1 is pulled out. The mandrel expanding / contracting mechanism shown in this figure connects a segment 8 obtained by dividing the outer shell of the mandrel 1 into a plurality (here, four) and a plurality of truncated cones (or wedge-shaped members) that slide inside the mandrel 1. It comprises an expansion / contraction shaft 9, a segment support member 10 fixed to the segment 8 and in contact with the inclined surface of the expansion / contraction shaft 9, and a rotary cylinder 11 for rotatably supporting the expansion / contraction shaft 9 and reciprocating in the axial direction. . Although not shown, the joints of the segments 8 are formed in a comb shape so that the coil can be wound in a perfect circle even in a state where the diameter is expanded. This mandrel expansion / contraction mechanism reciprocates the expansion / contraction shaft 9 in the axial direction by supplying hydraulic pressure to the rotary cylinder 11, and causes the segment support member 10 to abut on a slope inclined in the axial direction of the expansion / contraction shaft 9 to expand / contract the segment 8. It is made to let.

[0004]

The mandrel expanding / contracting mechanism of the downcoiler described above has a complicated structure in order to increase the winding accuracy of the coil, and is difficult to maintain and expensive. Also, when the bar after rough rolling is wound around a coil before finish rolling, it is not necessary to wind it round and tight like a downcoiler that winds a strip after finish rolling, which is the final product. Even if some scratches and wrinkles are formed, it can be flattened by the subsequent finish rolling. Therefore, in such a case, the use of the mandrel expansion / contraction mechanism of the downcoiler is not suitable in terms of cost-effectiveness.

The present invention has been made to solve the above-mentioned problems. That is, an object of the present invention is to provide a coil winding device having a function of expanding and reducing the radius of a mandrel with a simple structure.

[0006]

According to the present invention, after a hot-rolled material is roughly rolled, it is wound into a coil using a mandrel at a winding position, and the coil is moved from the winding position to the unwinding position. In the coil winding device provided on the line for finish rolling while rewinding at the rewind position, the mandrel is at least divided into two by a plane including the axis, and a plane perpendicular to the axis. Divided into two
Further, a segment having a tapered surface with a diameter reduced inward in the width direction of the coil on the inner surface and a shaft divided into two by a plane perpendicular to the axis and having a tapered surface along the tapered surface on the outer surface, By moving each of the shafts outward in the width direction of the coil, the segment is reduced in diameter along the tapered surface, and further by moving each of the shafts outward in the width direction of the coil, the segment is moved from the coil. A coil winding device is provided.

The present invention described above is used when the winding position and the rewinding position are completely separated to perform winding and rewinding of the coil. The present invention relates to a coil winding device that performs winding. In this coil winding device, it is necessary to transfer the coil to the coil rewinding device at the rewinding position after winding of the coil is completed. Therefore, the mandrel used for winding the coil must be removed. Therefore, in the present invention, first, the outer shell of the mandrel is divided into a plurality of segments by dividing the outer shell into a plane including the axis and a plane perpendicular to the axis, and further, a shaft rotating the segment is defined by a plane perpendicular to the axis. It was divided so that the segment and the shaft could be retracted (moved) outward in the width direction of the coil. Next, a tapered surface with a reduced diameter is provided on the inner surface of the segment in the width direction of the coil, and a tapered surface with a reduced diameter is also provided on the outer surface of the shaft in the width direction of the coil. By moving the tapered surface along the key, the segment can be expanded or contracted. With the above configuration, in order to remove the mandrel after the coil winding is completed, the shaft is moved outward in the width direction of the coil to reduce the diameter of the segment, the shaft and the segment are engaged, and the shaft is further moved. May be moved outward in the width direction of the coil. Therefore, the radius of the mandrel can be enlarged and reduced with a simple structure.

According to the embodiment of the present invention,
(1) It is preferable that the segments adjacent to each other in the circumferential direction are connected to each other by a link mechanism, and further, an urging means for constantly urging each segment inward in the radial direction is provided. The segment has a space whose diameter is increased so as to form a step with the tapered surface in the vicinity of the joint portion, while the shaft has a convex portion moving in the space on the outer peripheral surface, and the convex portion Preferably, the segment is pulled out of the coil by engaging with the step portion. (3) The shaft has a flange portion having a substantially L-shaped cross-section provided so as to cover an end portion of the segment. Preferably, the inner surface of the flange portion and the outer surface of the segment are brought into contact with each other to position the segment at the time of coil winding and maintain the shape of the mandrel constant. There.

According to the above-described embodiment of the present invention,
(1) In a state where the coil is not wound, the segment does not detach from the shaft, and the operation can be performed safely and smoothly. (2) The shaft and the segment are engaged after the diameter of the segment is reduced. The segment can be reliably moved outward in the width direction of the coil together with the shaft. (3) When the coil is wound, the mandrel can maintain a constant shape, and the coil can be wound stably. It can be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of a coil winding device of the present invention, and FIG.
2 is a sectional view taken along the line AA in FIG. 2, and FIG. 2B is a sectional view taken along the line BB in FIG. Note that the wound coil 2 is indicated by a two-dot chain line. In the coil winding device of the present invention shown in these figures, the mandrel 1 is divided into at least two parts by a plane including the axis (see FIG. 2) and two parts by a plane perpendicular to the axis (see FIG. 1). A segment 3 having an inner surface provided with a tapered surface 3t whose diameter is reduced inward in the width direction of the coil 2; and a tapered surface 4 which is divided into two by a plane perpendicular to the axis and has an outer surface along the tapered surface 3t.
a shaft 4 provided with a shaft t and moving the shafts 4 and 4 outward in the width direction of the coil 2 to reduce the diameter of the segment 3 along the tapered surface 4t. The segment 3 is removed from the coil 2 by moving the coil 2 outward in the width direction.

The segment 3 is, as shown in FIG.
At the center in the width direction of the coil 2, the coil 2 is divided into two parts (right and left in the figure) by a plane perpendicular to the axis. The left and right segments 3 and 3 are connected by a connecting portion 3a so that the outer peripheral surface is substantially smooth (so as to make a step as small as possible). The coupling portion 3a is formed with a tapered surface that engages with each other to facilitate coupling of the segments 3. Also, at the outer end of the coil 2 in the width direction,
A flange 3f whose diameter is smaller than the outer diameter of the segment is formed. Further, on the inner surface of each segment 3, a tapered surface 3t whose diameter is reduced from the outside in the width direction of the coil 2 toward the coupling portion 3a is formed, and a step portion 3b is formed near the coupling portion 3a. When the segments 3 are joined, a substantially cylindrical space 3s is formed on the inner surface of the joint 3a.

Further, as shown in FIG. 2, the segment 3 is divided into two parts (up and down in the figure) by a plane including the axis. The segments (here, upper and lower segments) 3 and 3 adjacent in the circumferential direction are connected by a link mechanism 5 at the ends of the coupling portion 3a and the flange portion 3f. Here, FIG. 2C is a side view of the link mechanism 5. In the link mechanism 5, the upper and lower segments 3 are connected by a pin 5p by a link 5r having a round hole and a long hole 5a, so that the segment 3 is not separated from the shaft 4. Further, the link mechanism 5 is provided with a tension spring 5b that constantly urges each of the segments 3 and 3 inward in the radial direction. This tension spring 5b is hung between the pin head of the pin 5p and the stopper member 5s, and the pin 5p of the upper and lower segments 3 and 3.
It is hung in between. By providing the urging means (tensile spring 5b) in this way, the segment 3
The diameter can be reliably reduced with the movement of.

The shaft 4 is connected to the segment 3 described above.
The key 4k transmits torque to the segment 3 to rotate the segment 3. The segment 3 is formed with a key groove 3k that fits into the key 4k, and the segment 3 eventually comes into sliding contact with the key 4k and is reduced in diameter. As shown in FIG. 1, like the segment 3, the shaft 4 is divided into two parts (right and left in the figure) by a plane perpendicular to the axis at the center in the width direction of the coil 2, and the coupling part 4a Are designed to engage. And, on the outer peripheral surface of the shaft 4,
Tapered surface 4t along tapered surface 3t of segment 3
Are formed. When the left and right shafts 4 and the segment 3 are combined, a convex portion 4b is provided on the outer peripheral surface of the shaft 4 existing in the space 3s of the segment 3 at a position away from the step portion 3b by a certain distance. Convex part 4
b is adapted to be caught on the step 3b. Therefore, the shaft 4 can move by the distance between the step 3b and the projection 4b. Further, the shaft 4 has a flange portion 4f having a substantially L-shaped cross section provided so as to cover the flange portion 3f of the segment 3, and an inner surface of the flange portion 4f and an outer surface of the flange portion 3f are brought into contact with each other. Thus, the segment 3 is positioned at the time of coil winding, and the shape of the mandrel 1 is maintained constant.

As shown in FIG. 1, both ends of the shaft 4 on the outer side in the width direction of the coil 2 are supported by a drive 6 and a frame 7. The drive 6 rotatably supports a gear 6a rotated by a motor (not shown). A gear 6b meshing with the gear 6a is provided on the shaft 4, and both sides of the gear 6b are supported by bearings 6c and the like. It is rotatably supported. In addition, drive 6
Is fixed to a support 6d placed on the rail 6r, and can be moved on the rail 6r together with the support 6d by a hydraulic cylinder (or air cylinder) 6e. On the other hand, the frame 7 rotatably supports the shaft 4 with a bearing 7c or the like.
Similarly to the above, the hydraulic cylinder (or air cylinder) 7e is fixed to a support 7d placed on the rail 7r.
Thereby, the support table 7d can be moved on the rail 7r. Note that wheels may be provided on the support bases 6d and 7d instead of the rails 6r and 7r.

The operation of the above-described coil winding device of the present invention will be described with reference to FIG. In FIG.
(A) shows the state at the time of completion of coil winding, (B) shows the state where the diameter of the mandrel is reduced, and (C) shows the state when the mandrel is pulled out.

When the bar after the rough rolling is wound into a coil shape, as shown in FIG. 1, the left and right segments 3 and the shaft 4 are completely connected, and the segments 3 are positioned by the flange portions 4f. It plays a role as a mandrel 1. When the coil winding is completed, the state is as shown in FIG. Thereafter, it is necessary to transfer the coil to the rewind position in order to rewind, but before that, the mandrel 1 must be pulled out. Therefore, in the coil winding device of the present invention, the mandrel 1 is pulled out as follows. (1) From the state shown in FIG.
7e (see FIG. 1), each shaft 4 is slid outward in the width direction of the coil, and the projection 4b is
To the step 3b. At this time, segment 3
Is slid along the key 4k by the action of the tension spring 5b, the diameter is reduced as shown in FIG. 3B, and a gap is formed between the inner surface of the coil 2 and the outer surface of the segment 3. (2) Further, if each shaft 4 is slid outward in the width direction of the coil, as shown in FIG. 3C, the segment 3 can be slid together with the shaft 4 while the diameter of the segment 3 is reduced. The mandrel 1 can be removed from the coil 2.

In the embodiment of the present invention shown in FIGS. 1 to 3, the case where the coil 2 is wound into two parts (up and down in FIG. 2) by a plane including the axis is described. 1 is used in an elliptical shape, and the mandrel 1 is reduced in diameter by reducing its major axis. This is because when the bar after the rough rolling is wound around the coil 2 before performing the finish rolling, there is no need to wind the bar in a perfect circle and tightly like a downcoiler which winds the strip after the finish rolling as the final product. This is because even if the inner layer is slightly scratched or wrinkled, it can be flattened by finish rolling thereafter. Of course, if it is divided into three or more by a plane including the axis, the mandrel 1 can be used in a perfect circle, and the diameter can be reduced while maintaining the perfect circle.

According to the above-described coil winding device of the present invention, the diameter of the segment 3 can be reduced only by sliding the shaft 4, and the mandrel 1 can be removed from the coil 2. Therefore, when winding and rewinding the coil 2 by completely separating the winding position and the rewinding position, even if the coil 2 is wound using the mandrel 1, the coil 2 is wound without any trouble. It can be transferred to the return position. Therefore, it is possible to take advantage of the coil winding device using the mandrel 1 such that the winding can be performed at high speed and the thin rolled material can be stably wound.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0020]

According to the above-described coil winding device of the present invention, the mandrel is divided into a plurality of segments and two shafts, and a tapered surface, a step portion, a convex portion, and the like are formed on the mandrel. The segment can be reduced and removed from the coil simply by moving the segment outward in the width direction of the coil. That is, the mandrel can be pulled out with a simple structure and easy operation adapted to the step of winding the bar after the rough rolling into a coil before performing the finish rolling. Therefore, the mandrel can be easily pulled out,
The advantages of a coil winding device using any mandrel capable of high-speed winding and stable winding of a thin plate can be enjoyed. In addition, because of the simple structure, maintenance can be facilitated, and initial costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a coil winding device of the present invention.

2A is a cross-sectional view taken along the line AA in FIG. 1; FIG. 2B is a cross-sectional view taken along the line BB in FIG. 1;
(C) is a side view of the link mechanism 5.

FIG. 3 is an explanatory view of the operation of the coil winding device of the present invention, wherein (A) shows a state at the time of completion of coil winding;
(B) shows a state where the diameter of the mandrel is reduced, and (C) shows a state where the mandrel is pulled out.

4A and 4B are diagrams showing a mandrel expanding / contracting mechanism of the downcoiler, wherein FIG. 4A is a side sectional view thereof, and FIG. 4B is a sectional view taken along line BB in FIG. 4A.

FIG. 5 is a diagram schematically showing a hot rolling facility that performs finish rolling after rough rolling.

[Explanation of symbols]

 Reference Signs List 1 mandrel 2 coil 3 segment 3t tapered surface 3a connecting portion 3b step portion 3s space 3f flange portion 3k key groove 4 shaft 4t taper surface 4k key 4a connecting portion 4b convex portion 4f flange portion 5 link mechanism 5a long hole 5r link 5p pin 5p pin Tension spring 5b Stop member 6 Drive 6a, 6b Gear 6c, 7c Bearing 6r, 7r Rail 6d, 7d Support base 6e, 7e Hydraulic cylinder 8 Segment 9 Expansion / contraction shaft 10 Segment support member 11 Rotary cylinder

Continued on the front page (72) Inventor Hisashi Sato 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries, Ltd. Yokohama Engineering Center

Claims (4)

[Claims] After the hot-rolled material is roughly rolled, it is wound into a coil using a mandrel at a winding position, and the coil is transferred from the winding position to the unwinding position. In a coil winding device provided on a line that performs finish rolling while rewinding, the mandrel is at least divided into two by a plane including a shaft center, and is divided into two by a plane perpendicular to the shaft center, and furthermore, a coil is formed on an inner surface. A segment having a tapered surface with a diameter reduced inward in the width direction, and a shaft divided into two by a plane perpendicular to the axis and having a tapered surface along the tapered surface on the outer surface. By moving the segment outward in the width direction, the segment is reduced in diameter along the tapered surface,
The coil winding device, further comprising: moving the shaft outward in the width direction of the coil to remove the segment from the coil. 2. The segment according to claim 1, wherein the segments that are adjacent to each other in the circumferential direction are connected by a link mechanism, and a biasing unit that constantly biases each segment radially inward is provided. Coil winding device. 3. The segment has a space in which the diameter is increased near the coupling portion so as to form a step with the tapered surface, while the shaft has a convex portion moving in the space on the outer peripheral surface. 3. The coil winding device according to claim 1, wherein the segment is pulled out of the coil by engaging the convex portion with the step portion. 4. 4. The shaft has a flange portion having a substantially L-shaped cross section provided so as to cover an end portion of the segment, and an inner surface of the flange portion and an outer surface of the segment are brought into contact with each other. The coil winding device according to any one of claims 1 to 3, wherein the segment is positioned during coil winding to maintain the shape of the mandrel constant.