JPH059161B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the technical field of rolling and forming a steel plate or the like into a thin plate having a predetermined thickness.

<Summary of the gist> The invention of this application is a roll that has a sleeve roll fitted to the support roll in at least one pair of rolls such as a work roll, an intermediate roll, and a reinforcing roll, and rolls a steel plate, etc. This invention relates to a method of rolling a material by moving at least a pair of upper and lower sleeve rolls relative to each other in the axial direction along a support roll, and in particular, the contour of the sleeve roll has a cubic function with respect to the axial length. It is formed by an odd function curve such as , and one side is arranged point symmetrically with respect to the other, so that the sleeve roll is moved relative to the axial direction, and furthermore, in addition to the relative movement in the axial direction, the roll is This invention relates to a rolling method that imparts bending.

<Conventional technology> As is well known, as the bicycle and electrical industries prosper, demand for the rolled steel sheets that support them is increasing, and strict precision is also being required for shape control. .

Although technology has been developed that almost satisfies the required precision for controlling the shape of rolled steel sheets in the longitudinal direction, it is still not possible to supply sheet crowns that are exactly as designed. However, various technologies have been developed.

For example, technologies have been developed and adopted that control the shape of intermediate rolls by relatively moving them in the axial direction or applying roll bending. JP-A-51-103053 Invention and JP-A-53-
As shown in the invention disclosed in No. 48051 and the invention disclosed in Japanese Patent Application Laid-Open No. 53-48052, a roll bending device and a sleeve are provided in the pair of upper and lower rolls, and the sleeve is bent in the axial direction according to the width of the rolled material. Techniques have been developed to increase the bending effect of work rolls through adjustment and to facilitate sheet shape control.

<Problems to be Solved by the Invention> However, in the sleeve roll type of the prior art, the problem arises by shifting the end of the cylindrical sleeve fitted to the support roll to match the width of the rolled material. This is intended to increase the roll bending effect and eliminate the bending moment due to the contact load with the reinforcing roll, and in that sense, the relative movement of the sleeve in the axial direction is merely an auxiliary role for roll bending. There was a sense of inadequacy.

In other words, sheet shape control is limited to elastic-mechanical shape control based on roll deflection, and desired shape control does not extend to the center of the rolled material, and a powerful roll bending device is required. There were flaws.

In other words, control based only on roll deflection has the disadvantage that the large crown control function is insufficient, and there is a limit to the roll bending force due to limitations in the strength of the work roll and the size of the sleeve support roll. In addition, a powerful bending device is required to apply a perpendicular bending force to the large-diameter roll, and the control and management of these devices is extremely complicated.

<Object of the Invention> The object of the invention of this application is to solve the problems of the steel plate rolling technology based on the above-mentioned prior art. A sleeve roll is provided for each pair, and the sleeve roll fitted and wound around the support roll is given a geometric shape, that is, a shape curved in the axial direction such as an odd function curve in the axial direction, and the upper and lower pairs are By controlling the relative movement of the sleeve rolls in the axial direction and by adding roll bending, we can control the shape of the rolled material accurately and easily by controlling it geometrically and elastically. The purpose of this paper is to provide an excellent rolling method that will benefit the field of steel sheet forming technology.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is summarized in the above-mentioned claims, is to provide a work roll, an intermediate roll, and a reinforcing roll of a rolling mill. At least one pair of rolls in the pair of rolls is used as a sleeve roll, and each of the sleeve rolls fitted to a support roll is given a curved shape according to an odd function curve such as a cubic function in the axial direction to form an upper and lower pair of sleeves. Technical measures have been taken to enable a wide range of plate crown control by moving the roll relative to the support roll in the axial direction and further by applying roll bending.

<Example> Next, an example of the invention of this application will be described below with reference to the drawings.

The embodiment shown in FIGS. 1 to 5 is a two-high rolling roll mode, in which a pair of upper and lower work rolls 1 and 1' are sleeve roll types, and support rolls 2 and 2' having the same diameter in the axial direction have sleeve rolls. Rolls 3 and 3' are fitted loosely, and these work rolls 1 and 1' are supported by a roll chock and rolling device similar to the rolling mills that have been developed up to now. The devices that have been developed so far can also be applied.

The sleeve rolls 3 and 3' that are loosely fitted to the support rolls 2 and 2' having the same diameter in the axial direction have contours that are point symmetrical to each other, and the profile of the contours is, for example, three-dimensional. It is formed by an axial odd function curve such as a function.

As shown in FIG. 3, in the standard state, the cross section of the rolled material 4 is parallel to the axial direction.

Accordingly, from the standard state shown in FIG.
3' is relatively moved in the axial direction, the cross section of the rolling mill 4 becomes concave 4' as shown in FIG.
Alternatively, the shape of the plate crown can be controlled to a convex shape 4'' shown in FIG.

As shown in FIG. 2, in addition to imparting roll bending, shape control can be further assisted and finely adjusted, making it possible to obtain a desired plate crown.

The relative movement in the axial direction of these sleeve rolls 3, 3' and roll bending can be used together, and by using them together, the plate crown can be further easily controlled.

That is, by relatively moving the pair of upper and lower sleeve rolls 3, 3' in the axial direction, and by positioning the ends of the sleeve rolls 3, 3' outside the rolled material 4, the sleeve rolls,
A 3,3' geometry can be applied symmetrically to the rolled material to obtain the desired plate crown.

Furthermore, by applying roll bending in the process, it is possible to perform fine adjustment by roll deflection in addition to shape control by relative axial movement, and it is possible to obtain the required accurate plate shape. .

In the invention of this application, the plate crown is significantly controlled by geometric control by shifting the sleeve roll in the axial direction, and fine adjustments are made by roll bending as necessary, which is different from the conventional plate crown control method. are based on fundamentally different concepts.

Furthermore, the relative movement of the sleeve roll in the axial direction can be performed extremely smoothly since it is guided by the support roll.

Since the above-mentioned embodiments are basic embodiments of two-high rolling rolls, they can also be applied to four-high and six-high rolling rolls without any problems, and the examples of these application modes will be described below. Next, to explain in order, the 6th,
The embodiment shown in Fig. 7 is a four-high rolling roll embodiment, in which the upper and lower rolls 1'', 1 of the work roll are similar to the conventional straight type embodiment, and the upper and lower reinforcing rolls 5, 5' are provided with sleeve rolls. 7,
7' are arranged, and its supporting rolls 6,
6' has a cylindrical shape, and the sleeve rolls 7, 7' that are loosely fitted therein are provided with a contour in the axial direction by an odd function curve such as a cubic function, and are in the standard state shown in FIG. The reinforcing rolls 5, 5' are sleeve rolls, 7, 7' are the supporting rolls 6,
By relative movement in the axial direction on 6', the plate crown of the rolled material 4 can be controlled via the work rolls 1'', 1, and as shown in FIG.
Furthermore, by adding roll bending,
It becomes possible to increase the amount of control of the plate crown or to make fine adjustments.

Next, the embodiment shown in FIGS. 8 and 9 is an embodiment of six-high rolling rolls, in which sleeve rolls are used as intermediate roll pairs 8 and 8', and support rolls 9 and
The sleeve rolls 10, 10' which are loosely fitted in the sleeve rolls 10, 10' are arranged point symmetrically with their profiles given by odd function curves such as axial cubic functions, and the work roll pairs 1'', 1 and the reinforcement Roll pair 5″,
Reference numeral 5 uses a straight type, and by relatively moving the sleeve rolls 10, 10' in the axial direction from the configuration shown in FIG. 8, the plate crown of the rolled material 4' can be controlled.
As shown in FIG. 9, by imparting roll bending to the intermediate rolls 8, 8', it becomes possible to further assist the shape control amount or to perform fine adjustment.

Next, in the embodiment shown in FIG. 10, work roll pairs 1'' and 1 are made straight, and sleep type rolls are arranged for intermediate roll pairs 8 and 8' and reinforcing roll pairs 5 and 5'. set, intermediate roll pair 8,
8', the sleeve rolls 10, 10' are given a curved profile by a point-symmetric axial odd function curve,
The reinforcing rolls 5, 5' are arranged so that the sleeve rolls 7, 7' whose contours match the contours thereof are loosely fitted to the support rolls 6, 6' so that they are 180° symmetrical. Also in this embodiment, the desired sheet crown control can be performed by imparting not only relative axial movement but also roll bending to the pair of intermediate rolls 8, 8' and the pair of reinforcing rolls 5, 5'. It is issued by

Furthermore, in the embodiment shown in FIG. 11, it is a four-high rolling roll embodiment, and work rolls 1, 1',
Further, by using sleeve rolls for all of the reinforcing rolls 5 and 5' and imparting relative axial movement and roll bending, the desired plate crown can be controlled in the same way as in the above embodiments. be.

Further, the embodiment shown in FIG. 12 includes a pair of work rolls,
1, 1' and the pair of reinforcing rolls 5, 5' are sleeve rolls, and the pair of intermediate rolls 8'', 8 is a straight type roll. Also in this embodiment, the pair of work rolls 1 , 1' and the sleeves 3, 3' of the pair of reinforcing rolls 5, 5', and
In this embodiment, plate crown control is performed by imparting relative axial movement to the plates 5 and 5', or relative axial movement and roll bending.

Furthermore, the embodiment shown in FIG. 13 is an embodiment in which straight rolls are used for the reinforcing roll pair 5'', 5, and sleeve rolls are used for the work roll pair 1, 1' and the intermediate roll pair 8, 8'. , this embodiment also applies the axial movement and roll bending to form the desired plate crown in the rolled material 4.
This is an embodiment in which the shape can be controlled so that it can be applied to

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments; for example,
Various aspects can be adopted, such as allowing relative movement in the axial direction with respect to two-stage, four-stage, and six-stage rolling rolls, and providing roll bending.

<Effects of the Invention> As described above, according to the invention of this application, two stages, four stages,
Sleeve rolls are used as at least a pair of upper and lower rolls of a rolling roll such as a 6-high rolling roll, and the sleeve roll, which loosely fits into the support roll, is given a contour by an odd function curve such as a cubic function in the axial direction, and the upper and lower rolls are By arranging the support rolls point-symmetrically and giving relative axial movement to each support roll, it is possible to easily control the shape of the rolled material without having to bend the rolls using a conventional large-capacity bending device. Not only is this smoothed out, but the range of shape control is greatly increased, which is an excellent effect.

In addition, since each sleeve roll slides on the support roll, there is no need for a complicated sleeve guide or shift device, and the roll can be shifted using the support roll as a guide, making it easy to adopt even when using a double rolling machine. It has the advantage of being

Also, when applying roll bending which is used in combination with applying relative movement in the axial direction, the roll bending can be used as an auxiliary, so fine adjustments and corrections can be easily made. Since the bending force perpendicular to the axis is also small, less power is required, and there are no problems such as restrictions on roll bending force, which has the excellent effect of providing a degree of freedom in design. Ru.

[Brief explanation of the drawing]

The drawings are explanatory diagrams of the embodiment of the invention of this application, and Figs. 1 and 2 are partial cross-sectional views of the embodiment of the two-high rolling roll, and Figs. 3, 4, and 5 are the standard state of the rolled material and the rolled material. Plate cross-sections, Figures 6-13 are partial cross-sectional views of sleeve roll embodiments for various types of rolling mills. 2, 2'... Support roll, 3, 3'... Sleeve roll, 4... Rolled material, 1, 1'... Work roll,
8, 8'... intermediate roll, 5, 5'... reinforcing roll.

Claims (1)

[Scope of Claims] 1. A rolling method in which the sleeve roll is relatively moved in the axial direction along the support roll in the process of rolling a rolled material by a roll having a pair of rolls in which a sleeve roll is fitted to the support roll. , the pair of sleeve rolls having an outline formed by an odd function curve of axial length and arranged point-symmetrically to each other are each given relative movement in the axial direction with respect to its support roll. Rolling method. 2. In a rolling method in which the sleeve roll is relatively moved in the axial direction along the support roll in the process of rolling a rolled material by a roll having a pair of rolls in which a sleeve roll is fitted to the support roll, the contour is The pair of sleeve rolls, which are formed by an odd function curve of length and are arranged point-symmetrically with respect to each other, are each given relative movement in the axial direction with respect to its support roll, and also given roll bending. rolling method.