JPS61140324A - Roll changing device of roller leveler - Google Patents

Abstract

PURPOSE:To reduce th suspension time of a pass line, by drawing only a backup roll out of a housing separately from a work roll, in changing the backup rolls. CONSTITUTION:Upper rolling-reduction cylinders 21 are contracted to separate them from an upper frame 22, vertically moving cylinders 19 are contracted to raise the upper frame 22 and an upper roll chock 15, and upper backup rolls 13 are raised to the position where they are out of contact with the roll chock 3 of upper work rolls 1. On the other hand, rolling reduction cylinders 27 are contracted to lower a lower frame 24 to the position where the lower backup rolls 14 are out of contact with the roll chock 4 of lower word rolls 2. In this way, at the upper part, wheels 17 are in a state of being mounted on guide rails 18, and at the lower part, wheels 23 are in a state of being mounted on guide rails 25; and the wheels 17, 23 are rolled along the rails 18, 25 in the direction perpendicular to a pass line. The upper backup rolls 13 are drawn out of a housing 6 in a form of upper backup-roll unit, consisting of backup rolls 13, roll chock 15 and upper frame 22, and in the same manner, the lower backup rolls 14 are drawn out in a form of lower unit, consisting of backup rolls 14, roll chock 16 and lower frame 24.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a roll changing device for a roller leveler.

[Prior art 1] A conventional roller leveler generally consists of a plurality of work rolls arranged in a staggered manner along the pass line direction of the plate material so as to sandwich the pass line, and a backup roll that backs up the work rolls. So, with these O-ru,
This method applies repeated bending in the longitudinal direction to the plate material passing through the pass line to reduce residual stress within the plate material and correct warpage in the longitudinal direction of the plate material. Therefore, in such a conventional roller leveler, when replacing the backup roll,
The work roll and the backup roll are pulled out from the housing as one unit.

[Problems to be Solved by the Invention] For this reason, there was a problem in that the line was stopped during roll replacement work, and even plate materials that did not require straightening could not be passed through.

In the present invention, when replacing the backing roll, only the backing roll is pulled out from the housing separately from the work roll.

[Means for Solving the Problems] A roll changing device for a roller leveler according to the present invention includes a plurality of upper and lower work rolls arranged to sandwich a pass line, and an upper and lower backing roll that backs up the upper and lower work rolls. In the leveler, the upper and lower restraint rolls are respectively supported by upper and lower axle boxes to form upper and lower restraint roll units, and the upper and lower restraint roll units are respectively provided with upper and lower wheels, and the upper and lower restraint roll units are provided with upper and lower wheels. Equipped with a lifting device that supports the upper backing roll unit so that it can be raised and lowered via an upper guide rail that is perpendicular to the pass line that engages from the lower side, and a lower backing roll unit is required on the lower backing roll unit side. The structure includes a lower guide rail in a direction perpendicular to the pass line that engages with the upper wheel when the surface is lowered.

[Function 1] Therefore, the upper and lower work rolls remain at the pass line position, and the upper and lower work rolls are respectively pulled out as a roll unit along the upper and lower guide rails in a direction perpendicular to the pass line.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIG. 1, numerals 1.2 are upper and lower work rolls arranged in a staggered manner along the direction of the pass line L so as to sandwich the pass line L, and the upper and lower work rolls 1.2 are supported by shaft boxes 3.4, respectively. At the same time, balance cylinders 5, 5 are interposed between the left and right ends of the upper and lower work shaft boxes 3.4, and cylinder blocks 7.
8 is fixedly installed, and the protruding end of a supporting cylinder 9.10 built in opposite to the cylinder block 7.8 is connected to the axle box 3,
4 through guide blocks 11 and 12.

Further, 13.14 are upper and lower backing rolls, and the upper and lower backing rolls 13.14 are supported by shaft boxes 1s and is, respectively. Wheels 1 are mounted on the upper part of the axle box 15 on both sides in the direction of the pass line L.
7. An upper frame 22 having a diameter of 17 is provided, and the wheels 1
An L-shaped guide rail 18.18 that can engage with the wheel 17.17 from the lower side of 7.17 is disposed in a direction perpendicular to the pass line L, and the guide rails 18', 18 are connected to the lifting cylinder 19. Suspended and supported by 19, the lifting cylinder 19
．． 19 is fixed to a top frame 20, and further a reduction cylinder 21 is installed on the top frame 20 so as to be detachable from the upper frame 22. On the other hand, in the lower part of the axle box 16: wheels 23 similar to wheels 17, 17, . A lower frame 24 having 23 and a guide rail 2 which engages the wheels 23, 23 when the upper frame 24 is lowered.
5.degree. 25 is provided on the bottom frame 26, and furthermore, a reduction cylinder 27 is provided on the bottom frame 26 so as to be detachable from the lower frame 24.

In such a configuration, in normal straightening work, a roll gap is set by the balance cylinder 5, and a rolling force is applied to the upper and lower work rolls 1°2 supported by support cylinders 9 and 10, as shown in FIG. Cylinder 21.
27, the upper and lower frames 22, 24, and the upper and lower shaft boxes 15
．． 16. The plate material is passed between the upper and lower work rolls 1.2 with a predetermined reduction blade applied via the upper and lower hold-down rolls 13.14.

When replacing the upper and lower backing rolls 13 and 14, the second
As shown in the figure, the upper and lower cylinders 21 are contracted to separate the upper and lower cylinders 21 from the upper frame 22, and the lifting cylinders 19 are contracted to move the upper guide rail 18 and the wheels 1
7 Upper frame 22 and upper shaft box 1 suspended through which engagement
5 is raised, the upper work roll 10 is pulled up to a position where it does not come into contact with the shaft box 3. On the other hand, by sequentially contracting the reduction cylinder 27 and lowering the lower frame 24, the lower backing roll 1 is moved through the lower shaft box 16.
4 is lowered to a position where it does not come into contact with the axle box 4 of the lower work roll 2. This position is the position where the wheel 23 contacts the idle rail 25, and at this time, the reduction cylinder 27 is further contracted and disconnected from the lower frame 24.

As a result, the wheels 17 and 23 are placed on the guide rails 18 and 25, respectively, so that the wheels 17 and 23 are placed on the guide rails 18 and 25, respectively.
25 in a direction perpendicular to the pass line L, the upper backing roll 13 can be transformed into an upper backing roll unit consisting of the upper backing roll 13, the axle box 15, and the upper frame 22, and similarly, the lower backing roll 14 , bottom copy roll 1
4, an axle box 16, and a lower frame 24, each of which can be pulled out from the housing 6 as a lower support roll unit.

Incidentally, the new roll unit may be installed in the housing 6 by following the procedure reverse to the above.

In the present invention, as described above, the upper and lower backing rolls 1
3.14, the upper and lower working rolls 1.2 remain as shown in FIG. 3, and the supporting cylinders 9, 10
Since it is supported by the guide plate, it is possible to pass plate materials that only require light rolling or plate materials that do not require rolling at all.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the roll changing device for a roller leveler of the present invention, when replacing the backing roll, the work roll can be left at the pass line position without being moved, so that the work roll can be left at the pass line position without being moved. It is possible to pass uncompressed material through the line, and therefore, it has the excellent effect of shortening the downtime of the line.

[Brief explanation of the drawing]

FIG. 1 is a schematic view showing a roll changing device for a roller leveler according to the present invention, FIG. 2 is an explanatory view showing a roll changing procedure, and FIG. 3 is an explanatory view showing a state when the rolls are pulled out. 1.2 is a work roll, 3 and 4 are axle boxes, 6 is a housing,
9.10 is a support cylinder, 13.14 is a backing roll, 1
5.16 is an axle box, 17.23 is a wheel, 18.25 is a guide rail, 19 is a lifting cylinder, 21.27 is a reduction cylinder, and 22.24 is a frame. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 2 @ Figure 3

Claims (1)

[Claims] 1) In a roller leveler having a plurality of upper and lower work rolls arranged to sandwich a pass line and upper and lower backing rolls that back up the upper and lower work rolls, the upper and lower backing rolls are supported by upper and lower shaft boxes, respectively, and the upper and lower backing rolls are supported by upper and lower shaft boxes. In addition to forming a roll unit, the upper and lower restraint roll units are respectively provided with upper and lower wheels, and the upper restraint roll unit is provided with an upper guide rail in a direction perpendicular to a pass line that engages from the lower side of the upper wheel. It is equipped with a lifting device that supports the upper backing roll unit so that it can rise and fall, and on the lower backing roll unit side, there is a lower guide in the direction perpendicular to the pass line that engages with the lower wheel when the lower backing roll unit is lowered by the required amount. A roll changing device for a roller leveler characterized by being equipped with a rail.