JPS63108903A - Method for rolling narrow width stock for sendzimir mill - Google Patents

Abstract

PURPOSE:To stably roll a narrow width stock by supporting the large-diameter parts of intermediate rolls by means of small-diameter backing bearings and supporting the small-diameter parts thereof by large diameter backing bearings. CONSTITUTION:The outside part of the 2nd intermediate roll 15 in the position approximately corresponding to both ends of the stock is reduced in the diameter so that the rolling reaction of the stock 16 to be rolled is received approximately uniformly with respect to the transverse direction of the stock by the unreduced large-diameter parts to suppress the deformation of rolls 12, 14, 15. The large-diameter part 15L of the 2nd intermediate roll 15 is supported by the small-diameter backing bearings 13B, 13C. The small-diameter part 15S of the roll 15 is supported by the large-diameter backing bearings 13A, 13D. The rolling reaction is thereby received over the entire part of a mill housing 17 by which the degradation in the mill rigidity is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of rolling a narrow material in a Sendzimir mill.

[Conventional technology] FIG. 2 is a front view of the Sendzimir mill.

The Sendzimir mill 1 has an Ml intermediate roll 4 and a second intermediate roll 5 interposed between a work roll 2 and a backing bearing 3. The backing bearing 3 is divided into several parts in the width direction of the rolled material 6. sendzimir mill l
The rolling pressure acting on the material 6 to be rolled is transmitted to the mill housing 7 via the work roll 2 , the first intermediate roll 4 , the second intermediate roll 5 , and the puffing bearing 3 .

By the way, it is extremely difficult to roll thin materials such as shadow mask and lead frame materials that require strict shape accuracy with a wide-width mill. Therefore, in such a case, a narrow-width mill with a maximum material rolling width of 600 s+w is used. However, for manufacturing plants that have already installed wide-width mills, it is difficult to roll narrow-width materials using wide-width mills because installing a new narrow-width mill requires a large amount of equipment costs. becomes.

[Problems to be Solved by the Invention] However, when rolling a material whose width is narrower than the lower limit of the material rolling width of the mill specifications, the mill rigidity is lower than when rolling a material with a mill suitable for the material rolling width. As a result, the plate crown fluctuates greatly due to fluctuations in rolling load, resulting in a lack of stability in the plate shape.

In other words, when rolling a wide material with a wide width mill, the distribution of rolling pressure is approximately uniform in the width direction of the material.
When rolling a narrow-width material, rolling pressure acts only on the center width of the material, and unrestrained portions corresponding to the outer sides of both ends of the material become longer. Therefore, when a narrow width material is rolled by a wide width mill, the roll is easily deformed, and the plate shape is likely to be distorted as described above.

An object of the present invention is to stably roll a narrow width material using a wide width mill.

[Means for Solving the Problems] The present invention provides a Sendzimir mill that rolls a material whose width is narrower than the lower limit of the material rolling width of the mill specifications using a Sendzimir mill in which an intermediate roll is interposed between a work roll and a backing bearing. In the method for pumping a narrow width material, the outer part of the intermediate roll supported by the bar 7 king bearing is made smaller in diameter than the inner part of the part that substantially corresponds to both ends of the material. ,
The large diameter portion of the intermediate roll is supported by a small diameter backing bearing, and the small diameter portion of the intermediate roll is supported by a large diameter bar and king bearing for rolling.

[Function] According to the present invention, the diameter of the outer portion of the intermediate roll is reduced at a portion substantially corresponding to both ends of the material, and the rolling reaction force of the material to be rolled is reduced in the width direction of the material by the large diameter portion that is not reduced in diameter. It is possible to suppress the deformation of the roll by receiving it almost equally between the two.

In addition, since the large diameter portion of the intermediate roll is supported by a small diameter backing bearing, and the small diameter portion of the intermediate roll is supported by a large diameter backing bearing, the entire mill housing receives the rolling reaction force, reducing mill rigidity. It can also be prevented.

That is, according to the present invention, when rolling a narrow-width material using a wide-width mill, deformation of the roll can be suppressed without reducing mill rigidity, and the narrow-width material can be stably rolled.

[Example] FIG. 1 is a front view showing a Sendzimir mill according to an example of the present invention. Sendzimir Mill 11 is work roll 1
2 and backing bearings 13 (13A, 13B, 13
c, 13D), a first intermediate roll 14 and a second intermediate roll 15 are interposed. Backing bearing 13
The bearings 13A to 15D are divided into four parts in the width direction of the rolled material 16. The rolling pressure acting on the material 16 rolled by the Sendzimir mill 11 is caused by the work rolls 12. First intermediate roll 14, second intermediate roll 15
, the mill housing 1 via the backing bearing 13
It is transmitted to 7.

Here, the second intermediate roll 15 is subjected to a stepped process at a portion substantially corresponding to the plate width W of the material 16. That is, the Sendzimir mill 11 rolls the intermediate roll 15 supported by the backing bearing 13 in order to roll the material 16 whose width is narrower than the lower limit of material rolling width (70% of the maximum material rolling width that can be rolled) of the mill specifications. The outer part of the part that substantially corresponds to both ends of the material is a small diameter part 155 that is smaller in diameter than the inner part of the part that substantially corresponds to both ends of the material, and the inner part of the part that substantially corresponds to both ends of the material is a large diameter part 155. Section 15L.

Further, the Sendzimir mill 11 connects the large diameter portion 15L of the second intermediate roll 15 to the small diameter backing bearings 13B, 1
3C, and the small diameter portion 153 of the intermediate roll 15 is supported by large diameter backing bearings 13A, 13D for rolling.

Next, the operation of Example E will be explained.

According to the above-described embodiment, the second intermediate roll 15 has the diameter reduced in the outer portion of the portion substantially corresponding to both ends of the material, so that the rolling reaction force of the material 16 to be rolled is reduced by the large diameter portion that is not reduced in diameter. The roll 12 is received approximately equally in the direction.
．． 14.15 deformation can be suppressed.

Further, since the large diameter portion 15L of the second intermediate roll 15 is supported by the small diameter backing bearings 13B and 13C, and the small diameter portion 15S of the intermediate roll 15 is supported by the large diameter puffing bearings 13A and 130, the rolling reaction force is received by the entire mill housing 17, and a decrease in mill rigidity can be prevented.

In addition, in the present invention, the second intermediate roll 1 having a reduced diameter can be obtained by only reducing the diameter of both end side portions of the second intermediate roll 15.
Assuming that the small diameter portion 153 of No. 5 is not supported by the backing bearing 13.

The restraint on the deformation of the second intermediate roll 15 becomes weaker, and the second intermediate roll 15 becomes more likely to deform downward in a convex manner as shown by the dashed line in FIG.

That is, according to the above embodiment, when rolling the narrow width material 16 using the wide width mill 11, the deformation of the rolls 12.14° 15 can be suppressed without reducing the mill rigidity, and the narrow width material 16 can be rolled. 16 can be rolled stably.

According to the experimental results of the present inventor, the length of the large diameter portion (15L) of the intermediate roll (length of the stepped portion) i and the plate width W of the rolled material 16 in the present invention are 0, θxi≦W≦41 + a...(1
) However, it is preferable to set α≦15 mm.Although the present invention can be applied regardless of the thickness of the plate, great effects can be obtained especially when it is applied to thin products with a thickness of 0.1 mm or less.

Hereinafter, specific implementation results of the present invention will be explained. That is, when rolling a mild steel plate with a width of 500 mm using a Sendzimir mill for rolling materials with a width of 1000 mm, the stepped portion of the second intermediate roll 15 has a length of 5001 cm, a large diameter portion 15L and a small diameter portion 15S. When the step is 0.5+mm,
Stable rolling is now possible.

[Effects of the Invention] As described above, according to the present invention, when rolling a narrow width material using a wide width mill, the mill rigidity can be rolled without reducing the mill rigidity.
Roll deformation can be suppressed and narrow width materials can be rolled stably.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a Sendzimir mill according to an embodiment of the present invention, FIG. 2 is a front view showing a Sendzimir mill according to a conventional example, and FIG. 3 is a front view showing main parts of a comparative example to the present invention. . 11... Sendzimir mill, 12... Work roll,
13 (13A, 13B, 13C, 13D)...backing bearing, 14...first intermediate roll, 15...
・Second intermediate roll, 15L...Large diameter part, 15s...
Small diameter portion, 16... material to be rolled. Agent Patent Attorney Osamu Shiokawa Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) In the method of rolling a narrow material in a Sendzimir mill, in which a material having a width narrower than the lower limit of material rolling width of the mill specifications is rolled by a Sendzimir mill in which an intermediate roll is interposed between a work roll and a backing bearing, the backing bearing The outer part of the intermediate roll supported by the material is made smaller in diameter than the inner part of the part which substantially corresponds to both ends of the material, and the large diameter part of the intermediate roll is supported by a small diameter backing bearing. A method for rolling a narrow width material in a Sendzimir mill, characterized in that the small diameter portion of the intermediate roll is supported and rolled by a large diameter backing bearing.