KR100788881B1 - Dual pass milling apparatus and the method thereof - Google Patents

Abstract

A double rolling apparatus and a double rolling method using the same are provided to improve rolling productivity, reduce installation space of the rolling apparatus, and reduce installation and management costs by simultaneously rolling two steel sheets using a drive roll and two driven rolls. A double rolling apparatus(1) comprises: a double rolling part including a drive roll(10) operated by a drive part and upper and lower driven rolls(11,12) linked with the drive roll and operated by the drive roll; and a pair of coiler mounting parts(61,62) including in-coilers(40~43) installed at entrance and exit sides of the double rolling part to transfer and coil rolled steel sheets from the double rolling part, and un-coilers installed at the entrance and exit sides of the double rolling part to supply the steel sheets to the double rolling part. The double rolling part includes compression rolls(21,22) installed on ends of compression cylinders(20,23) such that the compression rolls move up and down relative to the upper and the lower driven rolls to control the reduction ratio. The double rolling apparatus further comprises heat treatment furnaces(30~33) installed between the double rolling part and the coiler mounting parts to heat-treat the rolled steel sheets right after rolling steel sheets.

Description

Duplex rolling apparatus and its method {DUAL PASS MILLING APPARATUS AND THE METHOD THEREOF}

1 is a view showing a schematic configuration of a rolling apparatus of the prior art,

2 is a view showing a double rolling apparatus according to an embodiment of the present invention.

Description of the main symbols in the drawings

1: double rolling device

10: drive roll 11: upper driven roll

12: lower driven roll 20: upper compression cylinder

21: upper compression roll 22: lower compression roll

23: lower compression cylinder 30: first upper heat treatment furnace

31: second upper heat treatment furnace 32: first lower heat treatment furnace

33: second lower heat treatment furnace 40 ~ 43: coiler

51: drive belt 52: driven belt

61: first coiler support 62: second coiler support

The present invention relates to a rolling apparatus, and more particularly, to a double rolling apparatus configured to be capable of simultaneously rolling two plate members by one driving roll and two driven rolls formed on upper and lower portions of the driving roll.

1 is a view showing a schematic configuration of a rolling apparatus of the prior art, as shown in Figure 1, the conventional rolling apparatus is mounted on the upper and lower rolling rollers and then transport the plate between the rolling roller plate It is configured to perform a rolling operation for.

The rolling device having the configuration of the prior art as described above is fixed so as to roll only one sheet coil in one rolling operation, the productivity of the rolling operation is lowered, and additional rolling apparatus is additionally installed to improve the productivity. There is a problem to be done.

Accordingly, the rolling apparatus of the prior art has a problem that the management cost due to the increase in the work space, installation cost and management personnel increases in proportion to the number of installation.

Therefore, the present invention is to solve the above-mentioned problems of the prior art, by improving the rolling productivity by allowing two steel sheet material to be rolled at the same time by having a driving roll and a driven roll above and below the driving roll, It is an object of the present invention to provide a double rolling apparatus and a method for reducing the space required for installing the rolling apparatus, and to reduce the installation cost and the management cost.

The dual rolling device of the present invention for achieving the above object, a double rolling unit consisting of a drive roll operated by the drive unit, the upper driven roll and the lower driven roll operated in conjunction with the drive roll; And a pair of coiler mounting parts installed on the inlet / outlet side of the double rolling part and provided with a coiling coil for transferring the rolled sheet material from the double rolling part and an uncoiler for supplying the plate material to the double rolling part. do.

In the above-described configuration, the double rolling part is configured to adjust the reduction ratio by vertically moving the compression roll installed at the end of the compression cylinder with respect to the upper and lower driven rolls, and a coiling coil (IN COILER) and an uncoil installed at the coiler mounting part. The unit (UN COILER) is configured to enable forward rotation and reverse rotation, and a heat treatment furnace is installed between the double rolling unit and the coiler mounting unit installed at the entry / exit side of the double rolling unit to heat-treat the rolled sheet immediately after rolling. .

The heat treatment furnace is composed of a pair of upper and lower portions respectively to perform heat treatment for each plate at the entry and exit side of the double rolling portion, the operation is performed so as not to perform the heat treatment at the side portion supplied with the plate to the double rolling portion, The heat treatment is controlled so that the heat treatment is performed only at the exit portion where the plate is transferred to the take-up coil. And the heat treatment furnace may be configured to heat treatment by a direct resistance heating method by the electrode roll.

The double rolling method of the present invention for achieving the above object is a double rolled portion consisting of a drive roll operated by the drive unit, the upper driven roll and the lower driven roll operated in conjunction with the drive roll; In the double rolling apparatus consisting of a coiling unit mounted on the entry and exit side of the double-rolled portion and a coiling unit installed in the winding coiler for transferring the rolled sheet material from the double-rolled portion and an uncoiler for supplying the sheet material to the double-rolled portion. It is characterized by rolling two plate coils simultaneously by the driving roll and the upper and lower driven rolls, respectively.

In the above-described method, the reduction ratio for the plate is controlled by moving the upper and lower driven rolls by compressing rolls installed at the ends of the compression cylinders, and the rolled sheet coils subjected to the double rolling apparatus are heat treated, wherein the heat treatment is performed. It is performed only for the rolled sheet conveyed from the exit side of the double rolling apparatus.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a view showing the configuration of a double rolling apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the dual rolling apparatus 1 of the present invention is driven by rotation of a driving motor 50 as a driving unit providing a driving force and a driving belt 51 connected to the driving motor 50. The upper driven roll 11 and the lower driven roll 12 which are installed to be rotated in opposite directions with the driving roll 10 by the driven belt 52 at the top and bottom of the roll 10 and the driving roll 10. It is provided.

An upper compression roll 21 is installed above the upper driven roll 11, and the upper compression roll 21 is moved up and down by the upper compression cylinder 20 to adjust the pressure applied to the upper driven roll 11. It is attached to the end of the upper compression cylinder (20). In addition, a lower compression roll 22 is installed below the lower driven roll 12, and the lower compression roll 22 is vertically moved by the lower compression cylinder 23 to apply pressure to the lower driven roll 12. It is attached to the end of the lower compression cylinder 23 to adjust.

On both sides of the driving roll 10 and the upper and lower driven rolls 11 and 12, the plate 60a and the driving roll 10 and the lower driven rolled by the driving roll 10 and the upper driven roll 11 are provided. The first upper heat treatment furnace 30, the second upper heat treatment furnace 31, and the first lower heat treatment furnace 32 and the second lower heat treatment furnace to independently heat treat the plate 60b rolled by the roll 12 ( 33 are respectively installed.

The upper and lower rolled plates may be supplied to the left side of the first upper heat treatment furnace 30 and the first lower heat treatment furnace 32 and the right side of the second upper heat treatment furnace 31 and the second lower heat treatment furnace 33. First and second coiler supports 61 and 62, to which coilers 40, 41, 42, 43 for picking up the rolled sheet, are mounted, respectively. In this case, the coilers 40 and 42 are interlocked with each other, the coilers 41 and 43 are interlocked, and the coilers supplying the rolled coils among the coilers interlocked with each other are uncoiled and rolled. The coiler which winds up a board | plate material becomes a winding coiler.

In the above-described configuration, the driving roll 10, the upper driven roll 11, the upper compression roll 21, the upper compression cylinder 20, the lower driven roll 12, the lower compression roll 22, the lower compression cylinder 23 ) Constitutes a configuration corresponding to the double rolling section of the present invention.

The first and second coiler supports 61 and 62 on which the coilers 40, 41, 42, and 43 are mounted form a configuration corresponding to the coiler mounting portion of the present invention.

Next, the process of the double rolling method of the present invention will be described by explaining the operation of the present invention having the above-described configuration.

As shown in FIG. 1, the sheet to be rolled is supplied to be rolled between the driving roll 10 and the upper and lower driven rolls 11 and 12, respectively.

At this time, the upper plate 60a is supplied by the coiler 40 on the left side and rolled by the driving roll 10 and the upper driven roll 11, and after the rolling, the heat treatment is performed in the second upper heat treatment furnace 32. After being performed, it is wound up by the coiler 42 on the right side. In this case, the coiler 40 on the left side becomes an uncoiler, and the coiler 42 on the right side becomes a coiling coil. The lower plate 60b is supplied by the coiler 42 on the right side and rolled by the driving roll 10 and the lower driven roll 12. After the rolling, the heat treatment is performed in the second lower heat treatment furnace 33. After being performed, it is wound up by the coiler 43 on the left side. In this case, the coiler 42 on the right side becomes an uncoiler, and the coiler 43 on the left side becomes a coiling coil.

In the rolling operation described above, the reduction ratios of the driving roll 10 and the plate members of the upper and lower driven rolls 11 and 12 are controlled by the upper and lower compression rolls 21 and 22. That is, the upper and lower compression rolls 21 and 22 are moved by the upper and lower compression cylinders 20 and 23, respectively, and rolled by moving the upper driven roll 11 and the lower driven roll 12 up and down, respectively. Adjust the reduction rate for the target plate.

Next, after the one-time rolling process is completed, the coiler and the driving roller are rotated in opposite directions to repeatedly perform the rolling and heat treatment. That is, the present invention is to control the coiler and the driving roller to repeat the forward and reverse rotation to perform a continuous rolling and heat treatment when it is necessary to repeat the rolling and heat treatment.

The present invention described above provides the effect of significantly improving the productivity compared to the prior art because the rolling process for the two plate at the same time in the upper and lower portion of the drive roll.

In addition, the present invention is to significantly reduce the number and additional facilities of the rolling rolls compared to the rolling mill of the prior art in the construction process of a separate rolling equipment to improve the rolling work speed, it is possible to reduce the number of management and its installation and It facilitates expansion and reduces installation and management costs.

Claims (10)

A double rolling unit comprising a driving roll operated by a driving unit, and an upper driven roll and a lower driven roll operated in conjunction with the driving roll; And a pair of coiler mounting parts installed on the inlet / outlet side of the double rolling part and provided with a coiling coil for transferring the rolled sheet material from the double rolling part and an uncoiler for supplying the plate material to the double rolling part. Double rolling device. The double rolling apparatus according to claim 1, wherein the double rolling unit is provided with a compression roll provided at an end of the compression cylinder to move up and down with respect to each of the upper and lower driven rolls in order to adjust the reduction ratio. The double rolling apparatus according to claim 1, wherein the coiling coil and the uncoiler installed in the coiler mounting unit are configured to enable forward rotation and reverse rotation. The double rolling apparatus according to claim 1, wherein a heat treatment furnace configured to perform heat treatment immediately after rolling is provided between the double rolling portion and the coiler mounting portions provided on the entry and exit sides of the double rolling portion. The double rolling apparatus according to claim 4, wherein the heat treatment furnace is configured to be heat treated by a direct resistance heating method using an electrode roll. A double rolling method comprising simultaneously rolling two sheet coils by the driving roll and the upper and lower driven rolls respectively in a double rolling apparatus having one driving roll and a driven roll provided above and below the driving roll. The method of claim 6, wherein the double rolling apparatus, A double rolling unit comprising a driving roll operated by a driving unit, and an upper driven roll and a lower driven roll operated in conjunction with the driving roll; And a pair of coiler mounting parts installed on the inlet / outlet side of the double rolling part and provided with a coiling coil for transferring the rolled sheet material from the double rolling part and an uncoiler for supplying the plate material to the double rolling part. Double rolling method. The double rolling method according to claim 6, wherein the reduction ratio of the sheet is controlled by moving a compression roll provided at the end of the compression cylinder with respect to the upper and lower driven rolls. The method of claim 6, wherein the rolled sheet coil passed through the double rolling apparatus is heat-treated. 10. The method of claim 9, wherein the heat treatment is a double rolling method, characterized in that performed on the rolled plate conveyed from the exit portion of the double rolling apparatus.

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