JPH0739911A - Roll grinding device for rolling mill - Google Patents

Abstract

PURPOSE:To provide a roll grinding device of a rolling mill which can reduce the recombining frequency of rolls and decrease the downtime of a line greatly. CONSTITUTION:A grinder 11 wherein an upper grindstone 15 and a lower grindstone 15 which are cylindrical or columnar are attached axially so that their end faces face the lower part of the outer peripheral surface of a work roll 51a and the upper part of the outer peripheral surface of a lower work roll 51b respectively and a grindstone elevating means composed of a pressing cylinder 16 etc., is provided, an oscillating means composed of a screw shaft 5, a guide shaft 4, etc., to reciprocate this grinder 11 in the direction of a roll shaft, and a transversally projecting cylinder 3, etc., fixed attachably and detachably in a housing 60 of the rolling mill are provided on this device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for grinding upper and lower work rolls of a rolling mill, with the housing being housed in the housing.

[0002]

2. Description of the Related Art For example, in an aluminum hot rolling mill,
Since foreign matters such as aluminum pieces adhere to the work roll during rolling, they are scraped off by a brush roll. Figure 4
FIG. 5 is a vertical cross-sectional view of the aluminum hot rolling mill, which is an example of the above-described conventional apparatus, broken at the central portion in the axial direction of the roll, and FIG.

In FIGS. 4 and 5, reference numeral 51a denotes an upper work roll, which is pivotally mounted on an upper work roll chock 54a fitted in the housing 60. Reference numeral 53 is a brush roll, and a brush roll chock 56 supporting both ends thereof is a work roll chock 54 by an arm 57.
Is rotatably attached to the work roll 51 and is always pulled by a spring 58 so as to be separated from the work roll 51. The drive side end is connected to a drive device (not shown) through a universal joint 65 that penetrates the upper work roll chock 54a. Wheels 62 on both upper work roll chocks 54a
Each a is rotatably attached. The above members constitute the upper work roll assembly 50a.

The lower work roll 51b, the brush roll 53 and the like are mounted on the lower work roll chock 54b similarly to the upper work roll assembly 50a, and these members constitute the lower work roll assembly 50b. Reference numeral 59 denotes an air cylinder, which is fixed to the inner surface of the housing 60 so as to press the brush roll chock 56 by the rod tip spherical surface portion to press the brush roll 53 against the work roll 51. 61a
Is an upper rail and 61b is a lower rail.
Each is installed inside. Reference numeral 52 is a backup roll, and 55 is a backup roll chock. 71a
Is an upper roll changing carriage, an upper rail 72a is laid, and is placed on a lower rail 72b of the lower roll changing carriage 71b.

During the hot rolling of the rolled aluminum material 49, the brush roll 53 is rotated and the upper and lower work rolls 51a and 51b are pressed by the air cylinder 59 to scrape off the aluminum pieces adhering to the outer peripheral surface. Rolled material 49
It prevents bites and scratches.

Upper and lower work roll assemblies 50a,
When reassembling 50b, the upper roll changing carriage 71a and the lower roll changing carriage 71b are moved to move the upper rails 61 of both sides.
a, 72a and the lower rails 61b, 72b are connected, and the upper work roll assembly 50a and the lower work roll assembly 50b are lowered to mount the wheels 62 on the upper rail 61a and the lower rail 61b. Then, the upper work roll assembly 50a is pulled out onto the upper rail 72b of the upper roll changing carriage 71a to remove the upper roll changing carriage 71a, and the lower work roll assembly 50b is placed on the upper rail 72b of the upper roll changing carriage 71a. Pull it out and transport it to the maintenance area.

[0007]

For example, in an aluminum hot rolling mill or a small rolling mill in which brush rolls are installed in the housing, a conventional online roll grinding machine is installed without a space permanently provided in the housing. Therefore, it is necessary to reassemble the work roll assembly when foreign matter such as aluminum pieces adhered during rolling does not fall off with the brush roll or the work roll wears.
Particularly in an aluminum hot rolling mill, the frequency of roll re-assembling is high, and the downtime of the line is increased to reduce the productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll grinding apparatus for a rolling mill, which can reduce the frequency of roll replacement and can significantly reduce the downtime of the line.

[0009]

A roll grinding apparatus for a rolling mill according to the present invention comprises a cylindrical or cylindrical upper grindstone and lower grindstone whose end surfaces are below the outer peripheral surface of the upper work roll and the outer circumference of the lower work roll. A grinder provided with a grindstone elevating means axially mounted so as to face each other above the surface, an oscillating means for reciprocating the grinder in the roll axial direction, and an oscillating guide member detachably fixed in the rolling mill housing. And is provided.

[0010]

According to the above construction, first, when the upper and lower work rolls are worn or foreign matter is attached by rolling, the upper work roll is raised to a predetermined height, and the grinding machine, the oscillating means, and the oscillating guide member are connected to each other. The grinder assembly consisting of (1) is inserted between the upper work roll and the lower work roll in the housing so that the end surface of the upper and lower grindstones is set to face the outer peripheral surface of the upper and lower work rolls.

Next, the oscillating guide member is fixed,
While rotating the upper and lower work rolls and the upper and lower grindstones,
The upper and lower grindstones are raised and lowered by the grindstone lifting means and pressed against the outer peripheral surfaces of the upper work roll and the lower work roll, and the outer peripheral surfaces of the upper work roll and the lower work roll are oscillated by the oscillating means in the roll axial direction. Grinding, straightening the roll profile while removing the upper and lower work rolls stored in the housing, and removing adhered foreign matter.

[0012]

FIG. 1 is a longitudinal sectional view of an aluminum hot rolling mill according to one embodiment of the present invention, taken along the roll axial center.
2 is a II-II sectional view of FIG. 1, and FIG. 3 is a III-III sectional enlarged view of FIG. The same members and assemblies as those of the conventional device are designated by the same reference numerals, and duplicated description will be omitted.

In FIGS. 1 and 2, reference numeral 1 denotes a pair of supporting carriages, and laterally extending cylinders 3 are mounted on both side surfaces in the rolling direction, and both supporting carriages 3 pass through a grinder 11. They are connected by a guide shaft 4 and one screw shaft 5. Grinding stones 15 are formed above and below the grinder 11 so that they can rotate freely so that one cylinder has a thickness equal to the grinding width by forming an inclination angle to the roll axis direction such as 0.5 ° (not shown). It is pivoted.

As shown in FIG. 3, the grinder 11 is slidably fitted to both guide shafts 4, and a nut 14 screwed to the screw shaft 5 is fitted thereto. Grinding machine 1
Rod part 1 having oil supply / drain holes 13 on the upper and lower surfaces of 1
2 is formed, and the pressing cylinder 16 fitted with the rod portion 12 is fitted and inserted so as to slide in the vertical direction.
The grindstone 15 is rotatably attached to a pressing cylinder 16. The above-mentioned members and parts constitute the grinder assembly 10.

With this structure, when the upper and lower work rolls 51a and 51b are worn by the aluminum hot rolling, or when aluminum pieces adhere to the brush rolls 53 and do not fall off, the upper and lower work rolls as shown in the figure. Brush roll 53
Are separated from the upper and lower work rolls 51a, 51b, and the upper work roll assembly 50a is replaced by the backup roll 52.
And the backup roll chock 55 together with the upper roll 72a of the upper roll changing carriage 71a.
Is connected to the upper rail 61a, and the grinder assembly 10 placed on the upper rail 72a is inserted into the upper rail 61a in the housing 60 as shown in FIG.

Next, as shown in FIG. 1, the inner surface of the housing 60 is pressed by each of the horizontal cylinders 3 to move the upper and lower grindstones 15 by the upper and lower roll axis C and the offset amount α of the rolling mill. Offset and fix.

After this, the upper and lower work rolls 51a, 51
When oil is press-fitted from the upper and lower oil supply / discharge holes 13 while rotating b, the upper and lower pressing cylinders 16 are raised and lowered to press the upper and lower grindstones 15 against the outer peripheral surfaces of the upper work roll 51a and the lower work roll 51b. The upper and lower grindstones 15 rotate according to the inclination angle and the offset described above.

Then, the screw shaft 5 is manually rotated to oscillate the grinder 11 and the grindstone 15 to grind the outer peripheral surfaces of the upper work roll 51a and the lower work roll 51b to remove foreign matters such as aluminum pieces. , Straighten the roll profile.

The grindstone 15 and the upper and lower work rolls 51
A grindstone rotation drive device may be provided in the grinder 11 without offsetting a and 51b. Further, the grinder 11 and the grindstone 1
When oscillating 5, the screw shaft 5 may be rotated by a motor, or a hydraulic cylinder may be used.

[0020]

According to the present invention, the upper work roll is raised to a predetermined height, the grinder assembly is inserted between the upper work roll and the lower work roll, and the upper and lower work rolls and the upper and lower grindstones are rotated to move the upper and lower work rolls. By pressing the grindstone on the outer peripheral surface of the upper and lower work rolls and oscillating in the roll axial direction,
It is possible to grind the outer peripheral surface of the lower work roll while it is housed in the housing to correct the roll profile and to remove the adhered foreign matter. Therefore, it is possible to significantly reduce the number of work roll rearrangements, reduce the downtime of the line, and improve the productivity.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an aluminum hot rolling mill, which is an embodiment of the present invention, cut at a central portion in a roll axial direction.

FIG. 2 is a sectional view taken along the line II-II in FIG.

3 is an enlarged cross-sectional view taken along the line III-III of FIG.

FIG. 4 is a vertical cross-sectional view of an aluminum hot rolling mill, which is an example of a conventional apparatus, broken at a central portion in a roll axial direction.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 Support Cart 3 Horizontal Cylinder 4 Guide Shaft 5 Screw Shaft 10 Grinder Assembly 11 Grinder 14 Nut 15 Grinding Stone 16 Pressing Cylinder 50a Upper Work Roll Assembly 50b Lower Work Roll Assembly 51a Upper Work Roll 51b Lower Work Roll 60 Housing

Claims (1)

[Claims] 1. A grindstone lifting means is provided by axially mounting a cylindrical or cylindrical upper grindstone and a lower grindstone such that their end faces face the outer peripheral surface of the upper work roll and the outer peripheral surface of the lower work roll, respectively. A roll grinding machine for a rolling mill, comprising: a grinding machine; an oscillating means for reciprocating the grinding machine in a roll axis direction; and an oscillating guide member detachably fixed in a rolling mill housing.