JPH0783884B2 - Vertical roll center variable device of universal rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shaped steel having a flange such as an H-shaped steel, for example,
The present invention relates to a device for freely moving the axial center of a vertical roll of a universal rolling machine for rolling I-shaped steel, channel steel, etc. in the rolling direction.

[Prior Art] When rolling a shaped steel having a flange such as an H-shaped steel or an I-shaped steel, the flange and the web are stretched (thickness before rolling / thickness after rolling) per pass within a certain range. Otherwise, it is known to generate waves in the lengthwise direction of the web, and in order to prevent this, it is possible to reduce the rolling web wave by moving the axis of the vertical roll in the rolling direction. Such a device is disclosed in JP-A-57-97807.

[Problems to be Solved by the Invention] The apparatus disclosed in Japanese Patent Laid-Open No. 57-97807 described above forms a symmetrical wedge on the flange of the shaft for supporting the vertical roll, and slides between the wedge and the chock. A slide plate that can be moved is provided, and the slide plate is slid through a pin that is projected from the piston by a hydraulic cylinder built in the chock, and the axis of the vertical roll is rolled in the rolling direction through the slide plate and the flange. Although it is to be moved, there are the following problems.

The reaction force received by the vertical rolls during rolling is transmitted to the vertical rolls, flange wedges, slide plates, pins, hydraulic cylinders, and chocks, but the rigidity is small and high speed due to the configuration being received by the hydraulic cylinders on the way. The shaft center position fluctuates due to shock etc. when the heavy rolling mill bites, which adversely affects the product dimensional accuracy.

The wedge end surface of the flange and the end surface of the slide plate slide in surface contact when the axis of the vertical roll moves, but scales etc. bite into this surface contact part during operation,
Malfunction occurs in the movement of the axis of the vertical roll.

[Means for Solving the Problems] In order to solve the above problems, a vertical roll shaft center variable device of a universal rolling mill according to the present invention comprises a pair of upper and lower horizontal rolls and a shaft orthogonal to the shaft centers of the horizontal rolls. In a vertical roll axis variable device of a universal rolling machine having a pair of left and right vertical rolls arranged on the core, forming both gaps in the rolling direction between the inner surface of the vertical roll chock and the outer surface of the vertical roll shaft,
At least a pair of pressing devices capable of moving vertical rolls in both rolling directions are provided in the both gaps, and further, a shaft center variable amount adjusting liner that directly receives a rolling reaction force is provided in the both gaps in a replaceable manner. To do.

[Operation] Since the end face of the vertical roll shaft is constantly pressed against the vertical roll chock via the axial center variable amount adjustment liner along the rolling direction, it is sufficient against shock when biting high-speed, heavy-weight rolled material. It is solid and the vertical axis position of the vertical roll does not change.

The vertical axis movement of the vertical roll can be adjusted directly by the hydraulic cylinder, and the variable axis center can be adjusted by the variable axis liner adjustment liner, so the axial center can be changed quickly and accurately in response to changes in the rolling direction.

Since the vertical roll axis center variable device is built into the vertical roll chock, the device is compact and can be easily incorporated into the existing universal mill.

The vertical axis of the vertical roll is moved directly by the hydraulic cylinder, so there is no sliding part in the thrust transmission part required for movement, so there is no biting of the scale etc. and stable axial movement is possible. .

[Embodiment] An embodiment of the present invention having these features will be described below with reference to the drawings.

FIG. 1 is a plan view of a vertical roll chock of a universal mill incorporating the vertical roll axis varying device of the present invention, and FIG. 2 is a sectional view taken along line AA. It is shown that the axis of the Dmm vertical roll is eccentric with respect to the horizontal roll axis 1 in the rolling direction. In the figure, 5 is a vertical roll chock, 2 is a vertical roll, 3 is a vertical roll shaft, and 6 is a hydraulic cylinder for varying the axial center. The mechanism for changing the shaft center by these devices is
This will be described with reference to the figure.

The vertical roll 2 is rotatably assembled on a vertical roll shaft 3 via a roller bearing 4, and the vertical roll shaft 3 is loaded on a vertical roll chock 5. The relationship between the vertical roll shaft 3 and the vertical roll chock 5 is as shown in FIG.
Rolling direction is movable with four sliding surfaces b, 7c, 7d,
A small amount of clearance is provided in the up and down direction for holding. The shaft center is changed by the shaft center changing hydraulic cylinders 6a and 6b shown in FIG. That is, in FIG. 4, the vertical roll assemblies 2, 3, 4 are pressed by the hydraulic cylinder 6a for varying the axis in the direction of the arrow in the figure. At this time, the shaft center variable hydraulic cylinder 6b is retracted to the stroke end.

The vertical roll assemblies 2, 3, 4 are the end faces of the vertical roll shafts, and the shaft core variable amount adjustment liners 8a, 8b, 8c, 8 shown in FIG.
It is pressed against the vertical roll chock 5 via d. This is a very important point. Since it is pressed along the rolling direction, it can withstand the shock of biting a high-speed, heavy-weight rolled material sufficiently firmly. Therefore, even when the rolling direction is reversed, it is pressed along the rolling direction accordingly. In addition, this mechanism minimizes the amount of movement required to change the axis, and the capacity of the hydraulic cylinder for changing the axis has also become the minimum, so it is possible to make the vertical roll axis variable device compact. Became. As a result, it can be incorporated into an existing universal mill.

Further, the adjustment of the shaft core variable amount can be performed by offline replacement of the shaft core variable amount adjustment liners 8a, 8b, 8c, 8d shown in FIG. At present, it is sufficient to adjust the variable amount of the shaft core in response to the size change of rolling. However, if there is a need for adjustment of the variable amount of the axis for each rolling pass in the future,
At that time, the position can be controlled by controlling the position of the hydraulic cylinder for changing the axis. In addition, variable axis movement is performed directly by the hydraulic cylinder, and the variable axis length is determined by the liner, which can be pressed there, thus shortening the variable time.

Next, referring to FIG. 3, a mechanism for following the variable axial center of the vertical roll guide will be described.

The vertical roll guides 9a and 9b are built in the stripper guide 10 of the vertical rolls 9a and 9b before and after the vertical roll 2 in the rolling direction. Then, as shown in the figure, the vertical roll guides 9a, 9
The b can rotate about the shaft 11, and the vertical roll guides 9a and 9b are constantly pressed against the vertical roll 2 via the spring 12. Therefore, the vertical roll 2a and the vertical roll guides 9a and 9b generated when the vertical roll has a variable axis center and moves in the rolling direction.
Automatically fills the gap between and. If there is a gap, the rolled material will hit and cause a big trouble. For this reason, the mechanism of this guide is also an important point.

In this example, the axial center variable hydraulic cylinder was used as a pressing device for moving the vertical rolls in both rolling directions, and the installation positions were set in both rolling directions and the upper and lower portions of the vertical roll chock, totaling four positions. Only two points in both rolling directions at the top of the vertical roll chock or two points in both rolling directions at the bottom of the chock
It may be provided only at the location, and the vertical roll can be moved.

Further, the replaceable shaft core variable amount adjusting liners are arranged on both sides of the pressing device in this embodiment, but they may be arranged on only one side. In this case, the installation position of the pressing device is C shown in FIG.
The shaft center variable amount adjustment liner may be installed at a position on the CC line by shifting the line to the left or right from the C line.

[Effects of the Invention] The effects obtained by the device of the present invention described above are as follows.

The shaft center can be moved quickly with an accurate amount of movement with respect to changes in the rolling direction, and the shaft center position does not fluctuate in response to fluctuations in the rolling reaction force, and has a solid structure.

The device is compact and easy to incorporate into existing universal mills.

Even if a scale etc. is caught in the shaft core moving part, the shaft core can always be moved stably.

As described above, the axial center movement of the vertical roll can be performed accurately, quickly and firmly with respect to the required drawing of the shape steel, and high-quality shape steel with good dimensional accuracy can be manufactured.

[Brief description of drawings]

FIG. 1 is a plan view of a vertical roll chock of a universal mill incorporating the vertical roll axis varying device of the present invention. FIG. 2 shows a sectional view taken along the line AA of FIG. FIG. 3 is a sectional view taken along line BB in FIG. FIG. 4 is a sectional view taken along line CC of FIG. 1 and shows an example in which a hydraulic cylinder for varying the axial center of a vertical roll is provided. FIG. 5 is a sectional view taken along the line D-D in FIG. 1 and shows an example in which a liner for varying the axial center position of the vertical roll is provided. 1 ... Horizontal roll core wire, 2 ... Vertical roll, 3 ... Vertical roll shaft, 4 ... Vertical roll bearing, 5 ... Vertical roll chock, 6 ...
Hydraulic cylinder for variable shaft core, 7 ... Sliding surface, 8 ... Liner for adjusting variable shaft core, 9 ... Vertical roll guide, 10 ... Vertical roll stripper guide. 11 ... Axis, 12 ... Spring, 13 ... Universal rolling mill, 14 ... H-shaped steel, 15 ... Horizontal roll, 16 ... Vertical roll shaft core, 17 ... Vertical roller bearing retainer

Front page continuation (72) Inventor Yasushi Horiuchi, No. 1 Tsukiko Hachiman-cho, Sakai City, Osaka Prefecture, Nippon Steel Corporation Sakai Steel Works Co., Ltd. (56) -49415 (JP, B1) JP 60-43201 (JP, B2)

Claims (1)

[Claims] 1. A vertical roll chock for a vertical roll center of a universal rolling mill having a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls arranged on an axis perpendicular to the axis of the horizontal rolls. Both gaps in the rolling direction are formed between the inner surface and the outer surface of the vertical roll shaft, and at least a pair of pressing devices capable of moving the vertical rolls in both rolling directions are provided in the both gaps, and the rolling reaction force is applied to the both gaps. A vertical roll shaft center variable device for a universal rolling mill, characterized in that a shaft core variable amount adjusting liner for directly receiving the heat is provided in an exchangeable manner.