JPH049202A - Division type roll for rolling mill - Google Patents

Abstract

PURPOSE:To create an optional roll crown by supporting divided rolls respectively on plural eccentric mounting parts of shaft for roller and housing the divided rollers inside one cylindric sleeve. CONSTITUTION:The plural mounting parts of shaft 31a, 31b, 31c for roller which are respectively in a different eccentric state to the axial center are formed on the roll shaft 31. The divided rollers which consist of the outer rings of rolling bearings 2a, 2b, 2c are supported freely rotatably on each of the mounting parts of shaft 31a, 31b, 31c for roller. 7 The divided rollers are housed inside one cylindric sleeve 36. Grooves 4 for guiding lubricating oil which are extended in the direction that intersects the axial center of roll are formed on at least either of the outer periphery of the divided rollers or the inner periphery of the sleeve 36. In this way, the eccentric state of each divided roll can be changed by turning the roll shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Utilization Public Expenses> The present invention relates to a split-type fool of a rolling mill whose roll crown can be changed.

BACKGROUND TECHNOLOGY When rolling a steel plate, edge elongation and distortion may occur. If elongation or the like occurs, the roll crown of the rolling roll is changed and adjusted to deal with it.

A rolling roll whose roll crown can be changed or adjusted has a plurality of divided rolls rotatably mounted on a support shaft via eccentric sleeves, and the roll crown can be changed or adjusted by rotating the eccentric sleeves individually using a sleeve rotation mechanism. , to obtain an arbitrary roll crown.

However, since this rolling roll is composed of a plurality of split rolls, there are gaps between the split rolls, and of course when the roll is in direct contact with a steel plate as a work roll,
Even when used as an intermediate roll or reinforcing roll, striped patterns corresponding to the split rolls were generated on the steel plate via the work rolls.

Therefore, the applicant has previously filed an application for a split-type roll for a rolling mill that can create any roll crown pattern with a simple configuration and that does not cause any risk of damaging the surface properties of the steel sheet (patent application). 1-103521).

Figure 7 shows the structure and operation of this split roll.

This will be explained based on FIG.

FIG. 7 shows a cross-sectional state of the split roll.

Five roller shaft attachment parts 31 a, 31 b, and 31 c having different eccentric directions and diameters are formed on the roll shaft 31.
Each roller shaft attachment part 31a, 3lb.

Rolling bearings 32a, 32b, 32c are fitted into 31c, and rolling bearings 32a, 32b.

The outer ring 32c is a divided roller that is rotatable with respect to the roller shaft attachment portion.

Both ends of the roll shaft 31 are rotatably supported by a housing 33. One end of the roll shaft 31 protrudes through the housing 33, and a rotating gear 3 is provided at one end of the roll shaft 31.
4 is fixed. The rotating gear 34 has a rack par 35
are engaged with each other, and the rack par 35 is moved up and down guided by a guide (not shown).

A pinion of a geared motor, such as a pulse generator, which is capable of detecting a rotation angle is engaged with the upper rack portion of the rack par 35, and the rotation angle of the rotation gear 34, that is, the roll shaft 31 is determined based on the vertical movement of the rack par 35. The rotation angle is detected.

A cylindrical sleeve 36 fits into the outer rings of the rolling bearings 32 a, 32 b, and 32 c, and the sleeve 3
The respective dividing rollers are housed inside 6. That is, in the split roll 40, the outer circumferential surface of the sleeve 36 comes into contact with the rolling roller or steel plate.

Next, the operation of the split roll 40 having the above configuration will be explained.

To change the roll crown, control the guard motor using an opening device (not shown) and move the rack par 35 up and down. As the rack par 35 moves up and down, the rotating gear 34 rotates, and the roll shaft 31 rotates. Each divided roller (rolling bearing 32a) is rotated by the rotation of the roll shaft 31.

The eccentricity of the outer rings 32b and 32c (outer rings 32b and 32c) changes to create an arbitrary roll crown pattern. ◇ FIG. 8 shows the eccentricity of each part of the roll shaft 31 in the split roll 40.

Each roller shaft attachment part 31a with respect to the center O of the roll shaft 31,
The centers Oa and Ob of 31b and 31c.

Oc are equidistantly eccentric at 90 degree intervals, and their outer peripheries (indicated by solid lines, broken lines, and dashed-dot lines, respectively) intersect with each other. For example, a rolling bearing 32a that fits into the roller shaft attachment part 31a
The outer circumference is the circumference of 31 meters in Figure 7.

In addition, since the divided rollers are housed in the sleeves 36, the outer peripheral surface of one sleeve 36 comes into contact with the rolling roll or steel plate, and the surface quality is not adversely affected.

<Problems to be Solved by the Invention> When the above-described split roll 40 is used as a reinforcing roll, the split roll 40 acts on the rolling roll with 1 000
Since the bearing has a rolling load greater than tonf, it easily deforms along the eccentricity of the rolling bearing 32 between the rolling roll and the sleeve 36, and the rolling bearing 32 comes into contact with the sleeve 36 and is driven by the sleeve 36.

Lubricating oil is supplied between the sleeve 36 and the rolling bearing 32 in order to prevent seizure and wear, as well as damage and shortening of the life of the sleeve 36. When the split roll 40 starts rotating at high speed, lubricating oil is drawn between the sleeve 36 and the rolling bearing 32, and an oil film forms as a sliding bearing, as shown in FIG. There is a risk of formation. When an oil film is formed, not only does the sleeve 36 and the rolling bearing 32 slip, but the gap between the upper and lower rolling rolls is reduced by the thickness of the oil film, potentially deteriorating plate thickness accuracy.

The present invention has been made in view of the above circumstances, and it is possible to create any desired roll crown pattern with a simple structure, and there is no risk of damaging the surface properties of the steel sheet, and it also prevents the formation of an oil film. An object of the present invention is to provide a split roll for a rolling mill that does not deteriorate plate thickness accuracy.

<Means for solving am:> The structure of the present invention for achieving the above object includes a roll shaft in which a plurality of roller shaft attachment portions each having a different eccentricity with respect to the shaft center are formed, and the roll shaft. a divided roller rotatably supported by each of the roller shaft attachment portions, a cylindrical sleeve housing each of the divided rollers inside, and at least the outer periphery of the divided roller or the inner periphery of the sleeve. It is characterized by comprising a groove for guiding lubricating oil formed on one side and extending in a direction intersecting the axis of the roll.

Function: By rotating the four-wheel axis, the eccentricity of the dividing rollers is changed and a roll crown pattern is created. The outer circumference of one cylindrical sleeve is uneven (it does not contact other rolls or the steel plate and affect the surface quality of the steel plate).

The lubricating oil supplied between the split roller and the sleeve is guided into the groove and does not form an oil film.

<Embodiment> FIG. 1 shows a cross-sectional state of a split roll according to an embodiment of the present invention, and FIG. 2 shows a side view of a rolling bearing. Components that are the same as those shown in FIG. 6 are designated by the same reference numerals and redundant explanations will be omitted.

Rolling bearings 2a, 2b, and 2c are fitted into the roller bearings 31a, 3lb, and 31c, and the outer rings of the rolling bearings 2g, 2b, and 2c function as divided rollers that are rotatable relative to the roller bearings. ing.

A spiral guide 4 for guiding lubricating oil is formed on the outer surface of the rolling bearing 2, and both ends of the groove 4 are provided at positions that do not come off the surface of the rolling bearing 2. This is to prevent burrs from forming when forming the grooves 4 and to prevent the surface of the rolling bearing 2 from becoming sagging. Further, the groove 4 extends in a direction intersecting the axis MS of the roll shaft 31, and the groove 4 extends between the rolling bearing 2 and the sleeve 3.
Since the grooves 6 rotate in contact with each other, it is desirable that the width of the grooves 4 across the axis BS is 115 or less of the length of the rolling bearing 2 so that the contact length is not significantly shortened. Furthermore, in order to prevent lubricating oil from being sealed in the groove 4 during rolling and causing slippage and a reduction in the roll gap, the guide 4 is set at an angle and depth (for example, about 0.05 mm) at which no lubricating oil is sealed.

According to the above-described split roll 1, similar to the above-described split roll 40, the eccentric state of each split cola (the outer ring of the rolling bearings 2a, 2b, 2c) changes by the rotation of the roll shaft 31, and any roll can be Create a crown pattern. In addition, since the divided rollers are housed in the sleeve 36, one sleeve 36 is attached to the roll or steel plate that is in contact with the other sleeve 36.
The outer circumferential surfaces of No. 6 are in contact with each other, and the surface quality is not adversely affected. Furthermore, the lubricating oil supplied between the rolling bearing 2 and the sleeve 36 is guided into the groove 4, and no oil film is formed between the rolling bearing 2 and the sleeve 36.

In the above embodiment, one spiral groove 4 was provided on the outer periphery of the rolling bearing 2, but as shown in FIGS. 3 to 6,
It is also possible to form a plurality of grooves extending in a direction transverse to axis IIS.

That is, the rolling bearing 2 shown in FIG. 3 has a plurality of grooves 5 formed at an angle with respect to the axis S over the entire width in the width direction.

The rolling bearing 21 shown in FIG. 4 has a plurality of (two) grooves 6 formed in the circumferential direction on the outer peripheral surface, and the pitch of the grooves 6 should be 1/10 or less of the diameter of the rolling bearing 2. is desirable.

The rolling bearing 2 shown in FIG. 5 has a plurality of grooves 7 formed in a portion of the outer peripheral surface in the circumferential direction.

The rolling bearing 2 shown in FIG. 6 has a plurality of grooves 8 formed in part in the width direction at an angle with respect to the axis S.

In any of the above configurations, lubricating oil flows through the grooves 5.6, 7.
8, no oil film is formed between the rolling bearing 2 and the sleeve 360.

In each of the above embodiments, grooves 4, 5, 6, and 7.8 were formed on the outer periphery of the rolling bearing 2, but similar grooves 4, 5, 6, 7, and 8 were formed on the inner periphery of the sleeve 36. It is also possible to form Furthermore, in the above embodiments, the rolling bearing is a cylindrical roller bearing having two rows of rollers, but it is not limited to two rows and can be used by appropriately selecting one as needed. In addition to cylindrical roller bearings, all types of rolling bearings that meet the usage conditions can be used, such as spherical roller bearings and tapered roller bearings. Furthermore, the number of bearings arranged in the axial direction can also be adjusted appropriately depending on the relationship with the device.

<Effects of the Invention> The split roll of the rolling mill of the present invention supports separate yItJO-rollers at each of the troublesome roller shaft attachment parts, and stores the split rollers inside a single cylindrical sleeve. ,
By rotating the roll shaft, the eccentricity of each divided roller can be changed, and any desired roll crown can be created. Further, since the outer circumferential surface of the sleeve comes into contact with the rolling rolls and steel plates and the split rollers do not come into direct contact with them, the surface properties of the steel plates are not adversely affected. In addition, since grooves are formed on at least one of the outer periphery of the split rollers or the inner periphery of the sleeve, extending in a direction that closely intersects the rolls, the lubricating oil supplied between the split rollers and the sleeve is guided to the grooves, and An oil film is not formed between the roller and the sleeve, and the roll diameter is not affected.

As a result, it is possible to create any roll crown pattern with a simple configuration, and there is no risk of damaging the surface properties of the steel sheet (or deteriorating the sheet thickness accuracy due to the formation of an oil film). Equipment costs can be reduced and product quality improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a split roll according to one embodiment of the present invention, FIG. 2 is a side view of the rolling-receiver, and FIGS. 3 to 6 are cross-sectional side views of split rolls according to other embodiments. A side view of a rolling bearing, FIG. 7 is a cross-sectional side view of a split roll without grooves, FIG. 8 is an explanatory diagram of the return state of the roll shaft, and FIG. 9 is an IK-IX Hayashi arrow in FIG. 7. This is a perspective view. In the drawing, 1 is a split roll, 2a, 2b, 2cl rolling bearings, 4.5, 6, 7.8 are grooves, 31 is a roll shaft, 31a, 31b, 31c are roller shaft attachment parts, 36 is a sleeve, S is an axis forest. Requested by Hidetoshi Oishi, Jingyo Co., Ltd. (and 1 other person) Mitsubishi Heavy Industries, Ltd. and NSK representative for patents

Claims (2)

[Claims] (1) A roll shaft in which a plurality of roller bearing portions having different eccentric states with respect to the axis are formed, a divided roller rotatably supported by each of the roller bearing portions of the roll shaft; a cylindrical sleeve that accommodates each of the divided rollers; a lubricating oil guide formed on at least one of the outer periphery of the divided roller or the inner periphery of the sleeve and extending in a direction intersecting the axis of the roll; A split roll for a rolling mill characterized by comprising grooves. (2) The split roll for a rolling mill according to claim 1, wherein the split roller supported rotatably is an outer ring of a rolling bearing.