JPH0761502B2 - Rewinding or winding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates mainly to a rewinding or winding machine for high temperature steel strips among rolled steel strips.

<Prior Art> The present invention can be applied to any rewinding or rewinding machine of a strip steel coil used in rolling and process lines, etc. I will describe it.

The strip steel rolled by the hot rolling mill is usually coiled in a coiler and sent to the pickling line which is the next processing step, but the coil temperature is high (for example, 500 to 700 ° C), Conventionally, the coil was left in a cooling yard for about 5 to 7 days to be cooled to near room temperature (room temperature) and then supplied to the rewinding machine on the inlet side of the pickling line.

On the other hand, in the pickling line, normally, the temperature of the acid solution in the pickling tank needs to be heated and maintained at about 70 to 90 ° C., and a considerable amount of heat is required to process the room temperature coil.

However, in recent years, the cooling period of the hot coil after hot rolling is shortened to 1/2 to 1/3 to shorten the process, and the hot coil (for example, 300 to 600 ° C) is supplied to the pickling line. As a result, the amount of heat for heating and holding the acid solution tends to be reduced to at least 1/2 or less of that in the conventional case, and energy saving tends to be achieved.

Here, a schematic structure of a conventional rewinding machine to which the present invention is applied will be described with reference to FIGS. 1, 3, and 5.

As shown in the figure, the present device is a mandrel 2 that holds a strip steel coil (hereinafter simply referred to as a coil) 1 in a detachable manner, a motor (not shown) that rotationally drives the mandrel 2, a speed reducer 3 and a mandrel support base. It is composed of four main members.

The mandrel 2 is composed of a drum 5 having a function of removably crimping and holding the coil 1, a drum shaft 6 of a hollow shaft supporting the drum 5 and a drum expansion / contraction device 7. The drum shaft 6 is cantilevered on the mandrel support base 4 via a neck bearing 8 and a tail bearing 9, and an outer board shaft 10 is fixed to the shaft end on the overhang side with bolts 11 and nuts 12 to fix the outer shaft. It is detachably supported by an outer board bearing support 15 that can be moved up and down installed on a base 14 via a board bearing 13, and a drum expansion / contraction device 7 composed of a thruster 7a and a hydraulic cylinder 7b is attached to the opposite shaft end. It is installed.

The drum 5 has an inner periphery slidably engaged with four guide grooves 6a axially provided on the outer periphery of the drum shaft 6, and four folders forming a plurality of wedge portions 16a on the outer periphery thereof. 16 and four substantially semi-cylindrical segments 17 each having a tapered groove 17a slidably engaged with the wedge portion 16a. Each spreader 16 is provided in the hollow portion of the drum shaft 6. The wedge rod 18 is connected to the cross-shaped shifting yoke 19 at the tip of the wedge lot 18, and the wedge rod 18 is reciprocally moved in the axial direction via the cylinder 7b, so that the wedge action of the spreader 16 causes the segment 17, that is, the outer diameter of the drum 5. Can be scaled.

With the above configuration, in order to mount the coil 1 on the drum 5, the outer board bearing support 15 is lowered and the coil 17 is contracted, and the coil 1 is drumed by using a coil car (not shown). After inserting from the tip, the segment 17 is enlarged, the coil 1 is pressed and held on the drum 5, and then the coil car is retracted out of the line.

<Problems to be Solved by the Invention> However, since such a conventional rewinding machine is designed for a room temperature coil and no consideration is given to the high temperature coil as described above, the high temperature coil is used as it is. When processed, the segment 17 and the spreader 16 are thermally deformed, the sliding surfaces of both members 16 and 17 are seized, and the expansion / contraction cannot be performed or the outer board bearing 13 or the tail bearing 9 is burned due to heat. However, it could not be used as it is.

The present invention has been proposed in view of the above problems,
When rewinding or winding up the high temperature coil, thermal deformation of the drum component or seizure of the sliding portion is prevented to enable reliable expansion and contraction of the drum for a long time, and the outer board bearing or tail bearing due to heat. It is an object of the present invention to provide a rewinding or winding machine capable of preventing burnout of the like.

<Means for Solving the Problems> In order to achieve the above object, the structure of the present invention has a drum shaft, a spreader slidably engaged with a guide groove provided on the outer periphery of the drum shaft, and the spreader. A rewinding or winding machine of a mandrel type strip steel, which comprises a drum having a segment which slidably engages with the outer peripheral portion of the spreader and expands and contracts by a wedge action accompanying the reciprocating motion of the spreader. A U-shaped conduit having an inlet and an outlet in the longitudinal direction inside the segment, a plurality of holes axially provided in the drum shaft, and a tip of one of the plurality of holes. Portion and the inlet of the U-shaped conduit to connect the one hole and the U-shaped conduit, and the U-shaped end of the other hole of the plurality of holes. In combination with the outlet of the conduit, the other A plurality of flexible tubes connecting the hole and the U-shaped conduit, a rotary joint provided at the base end portion of the drum shaft, and one of the plurality of holes through the rotary joint. A closed loop cooling pipe having a cooling medium supply pipe communicating with the proximal end of the cooling medium and a cooling medium discharge pipe communicating with the proximal end of the other of the plurality of holes through the rotary joint. The feature is that the system is constructed.

<Operation> With the above-described configuration, the cooling medium supplied from the supply pipe to the drum is formed in one hole of the drum shaft, one flexible tube, the U-shaped conduit, the other flexible tube, and the drum shaft. After flowing through the other hole in order, it is circulated so as to be discharged from the discharge pipe. Therefore, the drum is cooled, and the segments of the drum and the drum shaft are brought close to the same temperature in order to circulate the same cooling medium to cool the segment of the drum and the drum shaft.

<Examples> Detailed description will be given below with reference to the drawings.

FIG. 1 is a front view according to an embodiment of the device of the present invention, FIGS. 2 and 3 are views as seen from arrows AA and BB in FIG. 1, and FIG. 4 is D in FIG.
-D arrow view, FIG. 5 is a CC arrow view in FIG. 2, and FIG. 6 is a drum cooling system diagram.

In the present embodiment, as shown in the drawing, each segment 17 of the drum 5 has its inlet / outlet on the end surface on the outer board shaft 10 side,
The U-shaped conduit 20 is provided in the longitudinal direction so that a cooling medium (a cooling water in the illustrated example) made of a liquid such as cooling water or a gas such as air can be supplied. The U-shaped conduit 20 is
Since the cooling heat transfer area is larger than that of the straight pipe, the amount of cooling water can be reduced accordingly.

On the other hand, a rotary joint 21 for water supply and drainage is bonded to the outer periphery of the end of the drum shaft 6 on the side of the tail bearing 9. There are a total of three rows of ring grooves 22a, 22 for water supply and drainage on the inner circumference of this joint 21.
b, 22c, and the cooling water supply pipes 23, 24 and the drain pipe 25 are connected to the respective grooves. Further, the ring grooves 22a, 22b, 22c are respectively provided with the drum shaft 6 through the plurality of holes 26a, 26b, 26c.
It communicates with a plurality of holes 27a, 27b, 27c provided inside in the axial direction. Also, the holes 27a and 27c are each made up of two holes.
The outer board shaft tightening bolt 11 is communicated with the screw hole 11a via 28a, 28b. In the figure, 27d represents a plug. On the other hand, the bolt 11 is hollow, and the end of the nut 12 on the side of the nut 12 is connected to the U-shaped conduit 20 of the two segments 17 via flexible pipes 29a, 29b and an ebel shoint (not shown), respectively. It branches to the entrance and exit and communicates. Flexible tubes 29a, 29b
Bends as the segment 17 expands and contracts. In other words, the flexible tubes 29a and 29b are used in order to prevent expansion and contraction of the segment 17. Also, the holes 27b are composed of four holes in total,
A space 30 between the outer circumference of the drum shaft 6, the inner circumference of the segment 17, and the end surface of the spreader 16 on the tail bearing 9 side.
(See Fig. 3 and 4).

Although not shown, the rotary joint 21 is appropriately fixed to the tail bearing 9 or the casing of the thruster 7a.

On the other hand, on the outer peripheral portion of the drum 5, a pair of cooling water headers 31 composed of a plurality of spray nozzles 31a are axially provided at a position where they do not interfere with the outer periphery of the coil 1, and at least the drum 5 is provided.
It is constructed so that water can be poured over the entire length. Further, the cooling water header 31 and the water supply pipe 24 are provided with ON / OFF valves 32 and 33 for automatic operation, respectively.

The configuration other than the above is the same as that of the conventional rewinding machine described above, and thus will be omitted.

The procedure for rewinding the high temperature coil using the device of the present invention having the above configuration will be described below.

First, before the coil 1 is attached to the drum 5, water is supplied from the water supply pipe 23 to the segment 17, and the cooling water valves 32 and 33 for cooling the inside and outside of the drum 5 are closed. Next, the coil 1 is mounted on the drum 5 according to a conventionally known procedure, and the rewinding work is started. During this rewinding operation, the cooling water supplied from the supply pipe 23 to the drum 5 is cooled by the holes 27a, 28a, the flexible pipe 29a, and the U-shaped conduit.
After flowing in the order of 20, the flexible tube 29b and the holes 28b, 27c, the water is circulated so as to be drained from the drain tube 25. As a result, the drum 5 is cooled, and since the same cooling water is circulated to cool the segment 17 and the drum shaft 6 of the drum 5, the segment 17 and the drum shaft 6 approach the same temperature, and as a result, the spreader 16 Spreader without thermal deformation
There is no change in the gap between the sliding portion of 16 and the drum shaft 6. Therefore, the spreader 16 can always slide smoothly. After the completion of rewinding, during the waiting time until the next coil mounting, the valves 32 and 33 are opened as necessary depending on the temperature of the drum 5, and water is poured into the inside and the outside of the drum 5 for cooling.

Hereinafter, by repeating the procedure described above, the high temperature coil is unwound smoothly and continuously without causing thermal deformation of the segment 17 or the spreader 16 and seizure of the sliding surfaces of both members 17 and 16. be able to.

<Effects of the Invention> As described above in detail with the embodiments, according to the present invention, the drum can be cooled by the cooling medium flowing through the cooling system during the rewinding or winding operation of the high temperature coil, and the same. Since the cooling medium is circulated and cooled, the segment of the drum and the drum shaft can be brought close to the same temperature. Therefore, the rewinding or winding operation of the high temperature coil can be performed without causing thermal deformation of the segment or spreader and seizure of the sliding surface. Moreover, since the U-shaped pipe is provided to increase the cooling heat transfer area, the flow rate of the cooling medium can be reduced accordingly.

Further, the rewinding or winding machine according to the present invention can be easily provided by only modifying a part thereof. Therefore, there is an advantage that the conventional rewinding or winding machine can be diverted to a high temperature coil at an extremely low cost for modification.

[Brief description of drawings]

1 is a front view of a rewinding machine according to an embodiment of the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 is B in FIG.
-B arrow view, FIG. 4 is a D-D arrow view in FIG. 5, FIG. 5 is a longitudinal sectional view of the mandrel taken along CC line in FIG. 2,
FIG. 6 is a drum cooling system diagram. In the drawings, 1 is a coil, 2 is a mandrel, 5 is a drum, 23 and 24 are cooling water pipes, 27a, 27b, 27c, 28a and 28b are cooling water passage holes, and 31 is a cooling water header.

Claims (1)

[Claims] 1. A drum shaft, a spreader slidably engaged with a guide groove provided on the outer periphery of the drum shaft, and a slidable engagement with an outer peripheral portion of the spreader, which accompanies the reciprocating motion of the spreader. A mandrel-type steel strip rewinding or winding machine equipped with a drum having a segment that expands and contracts by a wedge action, having a U-shape provided in the longitudinal direction inside the segment having an inlet / outlet at the tip end surface of the segment. -Shaped pipe line, a plurality of holes provided in the drum shaft in the axial direction, and a tip portion of one of the plurality of holes and an inlet of the U-shaped pipe line. The hole is communicated with the U-shaped conduit, and is connected to the tip of the other hole of the plurality of holes and the outlet of the U-shaped conduit to connect the other hole and the U-shaped conduit. A plurality of flexible tubes communicating with the pipeline, A rotary joint provided at the base end of the shaft, a cooling medium supply pipe communicating with the base end of one of the plurality of holes through the rotary joint, and the rotary joint through the rotary joint. A rewinding or winding machine comprising a closed loop cooling system having a cooling medium discharge pipe communicating with the base end of the other of the plurality of holes.