KR101463351B1 - Shock absorbing unit for winding drum and mandrel coil box using the same - Google Patents

Abstract

A mandrel coil box using a shock absorbing unit for winding a drum and including the shock absorbing unit is provided. The shock absorbing unit includes: a housing to receive a mandrel; a disk rotatably coupled to an outer surface of the housing and rotatably coupled to one end of the mandrel; and an shock absorbing unit to primarily absorb the vibration transferred to the disk to convert the vibration into elastic force and to secondarily absorb the elastic force to attenuate the elastic force.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock absorbing unit for a winding drum, and a mandrel coil box using the same. BACKGROUND OF THE INVENTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mandrel coil box, and more particularly, to a shock absorber for a winding drum capable of absorbing eccentric and repetitive shocks generated during slab coiling or uncoiling, Coil box.

The integrated steel mill produces a wide variety of steel products from iron ore as raw material through a series of processes such as steel making → steel making → continuous casting → hot rolling. Each process is briefly described as follows. The steel making process is a process of charging molten iron ore and coke through the upper part of the blast furnace, blowing hot air from below to reduce the molten steel, And removing impurities through adjustment of various steps such as refining and the like to obtain molten steel.

Continuous casting is a process of continuously cooling and solidifying molten steel in a liquid state through a continuous casting machine in a curved shape to obtain an intermediate material such as a slab having a thickness of 250 mm. Hot rolling is a process of reheating the intermediate material to a high temperature of 1100 to 1300 ° C It is the final rolling process with the thickness and width desired by customers through post-rough rolling and finishing rolling. If automobile steel sheets are required to have better quality, cold rolling and plating processes may be carried out with hot-rolled steel sheets. However, the basic steel making processes include the above-mentioned steel making, steel making, continuous casting, and hot rolling.

The mini mill process was developed to improve the efficiency of the conventional steelmaking process described above. Minimil is a hot rolled continuous continuous casting of thin slab of 50 ~ 100mm produced by continuous casting machine because it uses molten steel produced by dissolving scrap iron in electric furnace and has good resource recyclability. Production facilities are not only compact but also highly productive.

However, the mini mill has a disadvantage in that it can not produce various kinds of steel sheets because of difficulty in controlling the components. Recently, a high mill process has been used in which the surface and internal stress of the mini mill hot rolled coil are drastically improved through high speed performance and rolling.

A mandrel type coil box may be provided in order to maintain the temperature of the steel sheet during the hot rolling in the conventional steel making process, the mini-milling process and the high-mill process, in particular, the longitudinal temperature of the hot-rolled steel sheet. A mandrel-type coil box is a device that is usually placed between roughing and finishing rolling to coiling and uncoiling the hot-rolled steel sheet. Whether or not a mandrel-type coil box is used is determined depending on the thickness of the hot-rolled steel sheet, but it is generally known that mandrels can be wound round when the thickness of the steel sheet is 20 mm or less.

1 is a view showing a general hot rolling process in which a coil box is used.

1, the molten steel supplied from the tundish 1 is cast into a thin slab of 50 to 100 mm through a continuous casting machine 2 of a curved shape, and this thin slab is fed through a rough rolling mill 3 The car is rolled. The primary-rolled hot-rolled steel sheet is cut through a cutter 4 to a weight unit corresponding to one coil length, and is uniformly maintained at a temperature of 1100 ° C or higher during passage through the induction heating furnace 5, And the temperature and material variation between the rear end portion and the rear end portion.

When the roughly rolled slab enters the coil box, the mandrel drum moves in the direction of the conveyance line of the slab, coils the slab through rotation, and supports the center of the slab. After the coiling, Uncoiling and discharging the slabs.

Conventionally, in a conventional mandrel coil box, when a disk is rotated in a state of a heavy weight in which a slab is wound around a mandrel drum, a crack or the like is generated in a welding portion such as a rail formed on the disk by repetitive impact on a shaft and a shaft bearing block connected to the eccentric or disk there was.

This mandrel coil box is a heavy-weight large-scale facility. It takes approximately 5 to 7 days to replace the coil box, takes about 20 hours to repair, and requires about 4 hours or more to re-operate the coil box after maintenance and repair. A heating process is required. Therefore, when a problem occurs in the mandrel coil box, the operation of the entire line is interrupted for a long time and the productivity is lowered.

Conventionally, apparatuses that improve productivity by shortening facility replacement time and failover time by easily replacing and repairing a facility in which a problem has occurred are described in detail in "Mendelcoil box, 2012-0048109) "and the like.

However, by facilitating the replacement and repair of troublesome equipment, the mandrel coil box is eccentrically operated with a heavy load, and the mandrel coil box is damaged due to repeated vibration or the like, The problem of deteriorating productivity has not been solved.

Patent Document 1:

The present invention provides a shock absorbing unit for a winding drum capable of absorbing and extinguishing an impact such as vibration repeatedly generated when a mandrel coil box is activated at a high load, and a mandrel coil box using the same.

The present invention also provides a shock absorbing unit for a winding drum capable of adjusting an eccentricity generated during operation of a mandrel coil box, and a mandrel coil box using the same.

A mandrel coil box using a shock absorbing unit for a winding drum according to an embodiment of the present invention includes a housing in which a mandrel is housed; A disk rotatably coupled to an outer surface of the housing and having one end rotatably coupled to the mandrel; And a shock absorbing unit for a take-up drum which primarily absorbs vibration transmitted to the disk and converts the elastic force into an elastic force, and secondarily absorbs the elastic force and extinguishes the elastic force.

The impact absorbing unit for the winding drum includes: a wheel provided so as to be in contact with an outer peripheral surface of the disk; A base on which the wheel is seated; And a buffer spring coupled to the base bottom to primarily absorb the vibration transmitted to the disk and convert the vibration into the elastic force.

The shock absorbing unit for the winding drum further comprises an annular tubular stopper formed with an internal space through which the buffer spring extends and which is provided at the center of the buffer spring in the longitudinal direction of the buffer spring.

The impact absorbing unit for the winding drum further includes a cylinder in which a rod coupled to the base bottom surface is stretched or retracted corresponding to a distance to which the base is moved so as to absorb and extinguish the elastic force.

Each of the shock absorbing units for the winding drum includes: a bearing coupled to a rotational axis of the wheel so that the wheel can rotate; A weight sensor installed at a lower portion of the bearing and sensing a load; And a control unit receiving the load information from the weight detection sensor, comparing the reference value with a previously input reference value, and transmitting an operation signal to the cylinder when the reference value is exceeded.

Wherein the shock absorbing unit for the winding drum is constituted by a first and a second shock absorbing unit for the first and second winding drums provided below the respective disks constituted by the first and second disks respectively coupled to both sides of the housing, The shock absorbing units for the first and second winding drums are spaced apart from each other such that they are in contact with the outer circumferential surfaces of the first and second disks, respectively, and when the eccentricity is generated in the disk, And the eccentricity generated by operation is adjusted.

The impact absorbing unit for a winding drum according to an embodiment of the present invention is characterized in that a shock absorbing unit for a take-up drum includes a first disk and a second disk which are respectively connected to the first and second disks, A wheel installed to rotate; A base on which the wheel is seated; And a plurality of buffer springs coupled to the base bottom so as to absorb vibrations transmitted to the first and second disks and convert the vibrations into an elastic force.

Preferably, the shock absorbing unit for a winding drum according to an embodiment of the present invention further includes an annular tube-shaped stopper formed with an internal space through which the buffer spring penetrates, and which is provided at a center portion thereof in the longitudinal direction of the buffer spring do.

The base has a rectangular shape, and four buffer springs are attached to the bottom edge of the base.

Preferably, a shock absorbing unit for a winding drum according to an embodiment of the present invention includes: a cylinder in which a rod coupled to the base bottom surface is stretched or contracted corresponding to a distance to which the base is moved to absorb and extinguish the elastic force; .

Preferably, the shock absorbing unit for a winding drum according to an embodiment of the present invention includes: a bearing coupled to a rotating shaft of the wheel so that the wheel can rotate; A weight sensor installed at a lower portion of the bearing and sensing a load; And a control unit receiving the load information from the weight detection sensor, comparing the reference value with a previously input reference value, and transmitting an operation signal to the cylinder when the reference value is exceeded.

According to the embodiment of the present invention, by absorbing and removing shocks such as vibration generated when the mandrel coil box and the various winding rollers are operated in a heavy load, it is possible to prolong the lifetime of the equipment and prevent the equipment from being damaged It is possible to improve the creativity.

Further, the eccentricity generated in the mandrel coil box and the various winding rollers having a high weight can be immediately adjusted to improve the productivity and improve the quality of the product.

1 is a view showing a general hot rolling process in which a coil box is used,
2 is a perspective view showing the installation of a shock absorbing unit for a winding drum according to an embodiment of the present invention,
3 is a sectional view of a mandrel coil box using a shock absorbing unit for a winding drum according to an embodiment of the present invention,
4 is an exploded perspective view of a shock absorbing unit for a winding drum according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

FIG. 2 is a perspective view showing the installation of a shock absorbing unit for a winding drum according to an embodiment of the present invention. FIGS. 3 (a) and 3 (b) Fig. 2 is a cross-sectional view of both sides of a mandrel coil box using a unit.

2 to 3, a mandrel coil box 1 using a shock absorbing unit for a winding drum according to an embodiment of the present invention includes a housing 20, rotatably mounted on both sides of the housing 20 And a shock absorbing unit (10) for a winding drum for absorbing and extinguishing an impact such as vibration transmitted to the disk (30).

The housing 20 is formed with an inlet through which the slab S is introduced and a discharge port through which the slab S is drawn out and a pair of mandrels 30a into which the slab S is wound is accommodated.

The disk 30 is composed of a first disk 31 and a second disk 32 which are respectively coupled to both sides of the housing 20 and both ends of the mandrel 30a are connected to the first disk 31 31 and the second disc 32 and is disposed between the first disc 31 and the second disc 32. [

One of the mandrels 30a coils the slab S which is drawn into the housing 20 and the other coils the other slab S to uncoil the slab S, (S). This is based on the same time zone. Referring to one mandrel 30a, the drawn slab S is coiled through rotation by its own axis and moved in the direction of the outgoing port as the disk 30 rotates And the coiled slab S is discharged to the outlet through the rotation by the self-axle.

At this time, as the mandrel 30a or the disk 30 rotates with a high load, an impact such as vibration is generated, which is transmitted to the disk 30. [ The shock absorbing unit 10 for the winding drum primarily absorbs the vibration transmitted to the disk 30, converts the vibration into an elastic force, absorbs the elastic force that is secondarily converted, and extinguishes the elastic force.

A pair of the shock absorbing unit 10 for the winding drum is installed so as to contact the outer circumferential surface of the disc 30 at a lower portion of the disc 30 while being spaced apart from each other by a predetermined distance so as to support the disc 30.

4 is an exploded perspective view of a shock absorbing unit for a winding drum according to an embodiment of the present invention.

4, the shock absorbing unit 10 for the winding drum according to the embodiment of the present invention includes a wheel 100 installed to be in contact with the outer circumferential surface of the disk 30, And a buffer spring 300 for absorbing the vibration transmitted to the disk 30 and converting the vibration into the elastic force.

The wheel 100 is installed so as to be in contact with the outer circumferential surface of the disc 30 and is rotated to correspond to the rotation of the disc 30.

The base 200 is formed in a rectangular plate shape and the wheel 100 is installed at the center of the plane so that a shock such as a vibration transmitted from the disk 30 through the wheel 100 is transmitted to the buffer spring 300 .

The buffer springs 300 are installed at the respective corners of the base 200 and are compressed by vibration or the like transmitted from the base 200 to store vibrations and the like by the elastic force.

At this time, it is preferable that the buffer springs 300 further include an annular tubular stopper 400 at the center thereof to prevent the buffer springs 300 from being damaged beyond the limit of compression. When the shock such as vibration transmitted through the base 200 exceeds the limit of the buffer spring 300, the stopper 400 restricts the movement of the base 200, Thereby preventing exceeding this limit.

Further, the stopper 400 has a fixing jaw or the like formed on its inner circumferential surface, and is positioned at the center of the buffer spring in the longitudinal direction of the buffer spring.

Preferably, the shock absorbing unit 10 for the winding drum further includes a cylinder 500 coupled to a bottom surface of the base 200 to be stretched or retracted. The shock absorbing spring 300 is compressed and compressed by the elastic force so that the shock absorbing spring 300 can be restrained by the shock absorbing spring 300 while the cylinder 500 is stretched or contracted corresponding to the distance that the base 200 is moved. The elastic force is absorbed and extinguished.

The cylinder 500 coupled to the bottom of the base 200 may be coupled to the bottom of the base 200 via a cushioning member 510 made of an elastic material such as rubber. This is effective in buffering the impact applied to the cylinder 500 when the base 200 is moved, thereby preventing the cylinder 500 from being damaged.

The shock absorbing unit 10 for a winding drum according to an embodiment of the present invention can smoothly rotate the wheel 100 rotated in accordance with the rotation of the disk 30, A weight sensor 600 disposed under the bearing 110 to sense a load transmitted to the wheel 100 and a sensor 110 for sensing a load detected by the weight sensor 600. [ And a controller 700 for receiving the load information, comparing the reference value with a previously inputted reference value, and transmitting an operation signal to the cylinder 500 according to the result.

 If the vibration is transmitted to the wheel 100 in real time and the cylinder 500 is operated when the reference value is exceeded, the elastic force of the cushion spring 300 stored in the cushion spring 300, Absorbs and extinguishes.

In this case, the weight sensor 600 may be a load cell that can sense a shock such as a vibration transmitted to the wheel 100 as a load.

The cylinder 500 may be a hydraulic cylinder, a pneumatic cylinder, or the like. The cylinder 500 is not limited to the type shown in the above-described embodiment, Various types of operating means capable of absorbing and extinguishing the elastic force converted by the spring 300 may be selectively applied.

The shock absorbing unit 10 for the winding drum includes a pair of first shock absorbing units 11 for the first take-up drum for supporting the first disk 31 and a pair of shock absorbing units 11 for supporting the second disk 32, And a shock absorbing unit 12 for the two-winding drum.

The four shock absorbing units 10 for the winding drum provided below the first and second discs 31 and 32 are preferably operated individually. This is because when the eccentricity is generated in the first and second disks 31 and 32 or the mandrel 30a, the shock absorbing units 10 for the respective winding drums are lifted or lowered individually to adjust the eccentricity.

At this time, the mandrel coil box 1 using the shock absorbing unit for the winding drum according to the embodiment of the present invention can detect the eccentricity of the first and second disks 31 and 32 and the mandrel 30a in real time The eccentricity detecting sensor (not shown) detects the eccentricity, the controller 700 controls each of the shock absorbing units 10 for the winding drum The eccentricity can be adjusted in real time by transmitting an operation signal to the cylinder 500 individually.

The operation of the impact absorption unit for a winding drum and the mandrel coil box using the same according to an embodiment of the present invention will be described with reference to the drawings.

As the mandrel 30a or the disk 30 rotates, an impact such as a vibration transmitted to the disk 30 is transmitted to the wheel 100. When the buffer spring 300 is compressed, To the elastic force.

At this time, the weight detecting sensor 600 senses an impact such as a vibration transmitted to the wheel 100 and transmits the sensed impact to the controller 700. The controller 700 detects load information from the weight detecting sensor 600 And transmits an operation signal to the cylinder 500 in comparison with the reference value.

Accordingly, the cylinder 500 is stretched or contracted corresponding to the movement distance of the base 200, absorbing and extinguishing the elastic force stored in the buffer spring 300.

When the eccentricity is generated in the mandrel 30a or the disk 30, the control unit 700 individually transmits an operation signal to each shock absorbing unit 10 for the winding drum in accordance with the eccentricity information Each of the cylinders 500 is stretched or contracted to adjust eccentricity.

Although the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that

S: Slav
1: mandrel coil box using shock absorbing unit for winding drum
10: shock absorbing unit for winding drum 20: housing
30: Disk 30a: Mandrel
31: first disc 32: second disc
100: Wheel 110: Bearing
200: Base 300: Buffer spring
400: Stopper 500: Cylinder
600: weight detection sensor 700:

Claims (11)

A housing in which the mandrel is received;
A disk rotatably coupled to an outer surface of the housing and having one end rotatably coupled to the mandrel; And
And a shock absorbing unit for a take-up drum that primarily absorbs vibration transmitted to the disk and converts the elastic force into an elastic force and secondarily absorbs and extinguishes the elastic force.
The method according to claim 1,
Wherein the shock absorbing unit for the winding drum comprises:
A wheel provided so as to be in contact with an outer circumferential surface of the disk;
A base on which the wheel is seated; And
And a cushion spring coupled to the base bottom so as to primarily absorb the vibration transmitted to the disk and convert the vibration into the elastic force.
The method of claim 2,
Wherein the shock absorbing unit for the winding drum comprises:
Further comprising an annular tube-shaped stopper having an inner space through which the buffer springs are inserted and installed at the center of the buffer springs in the longitudinal direction of the buffer springs.
The method of claim 2,
Wherein the shock absorbing unit for the winding drum comprises:
And a rod coupled to the base bottom in accordance with a distance at which the base is moved so as to absorb and extinguish the elastic force, is extended or retracted from the bottom of the mandrel coil box.
The method of claim 4,
Each of said shock absorbing units for said winding drum,
A bearing coupled to the rotation axis of the wheel so as to be rotatable and installed at a center of the base plane of the rectangular shape;
A weight sensor installed at a lower portion of the bearing and sensing a load; And
And a control unit receiving the load information from the weight detection sensor and comparing the reference value with a reference value input in advance, and transmitting an operation signal to the cylinder when the reference value is exceeded.
The method of claim 5,
The shock absorbing unit for the winding drum
And a shock absorbing unit for the first and second winding drums, the shock absorbing unit being disposed under each of the first and second disks coupled to both sides of the housing,
Wherein each of the shock absorbing units for the first and second winding drums is spaced apart such that a pair of the shock absorbing units are in contact with the outer peripheral surfaces of the first and second disks, And the eccentricity generated by operation is individually adjusted so as to adjust the eccentricity of the mandrel coil box.
A wheel installed to abut on one side of the outer circumferential surface of the first disk and the second disk to support a winding drum having a first disk or a second disk coupled to both ends of the winding roller;
A base on which the wheel is seated; And
And a plurality of buffer springs coupled to the base bottom so as to absorb vibrations transmitted to the first disk and the second disk and to convert the vibrations into an elastic force. The method of claim 7,
Further comprising an annular tubular stopper having an inner space through which the buffer springs are inserted and installed at the center of the buffer springs in the longitudinal direction thereof.
The method of claim 7,
Wherein the base has a rectangular shape and the buffer spring is attached to a bottom edge of the base of the base.
The method of claim 7,
And a rod coupled to the base bottom corresponding to a distance to which the base is moved so as to absorb and extinguish the elastic force, is extended or retracted.
The method of claim 10,
A bearing coupled to the rotation axis of the wheel so as to be rotatable and installed at a center of the base plane of the rectangular shape;
A weight sensor installed at a lower portion of the bearing and sensing a load; And
And a control unit receiving the load information from the weight detection sensor and comparing the reference value with a reference value input in advance and transmitting an operation signal to the cylinder when the reference value is exceeded.

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