JPH0114332Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a roll spindle support device in a rolling mill.

When replacing the rolls in a rolling mill, the distance between the centers of the newly installed roll and the spindle that connects it to the spindle that transmits rotational force may differ slightly, and the center position may also shift. Although various adjustment mechanisms have been provided to match the two, they have the disadvantage that they are time-consuming to operate. In order to eliminate this drawback,
The present applicant previously provided a spindle support device in Japanese Patent Publication No. 47-44869 in which the end of the roll shaft is fitted into the coupling head of the spindle and the two are automatically brought into alignment without requiring any operation. are doing. That is, in the above-mentioned device, the vertically arranged clamp members that clamp the coupling heads of the spindle that are fitted to the upper and lower rolls of the rolling mill are slidably fitted to the pillars erected on the base, and are rotatable. The load acting on the lever provided on the lever is supported floatingly in a balanced manner and connected for relative movement.As one clamp member moves, the other clamp member can be displaced by the same amount, and the end of the roll shaft is The two are automatically made to match by using the fitting input to the coupling ring. However, since the above device has a structure in which the clamp member slides on the support, it becomes difficult to slide smoothly due to creaks due to manufacturing errors or dust adhering from the outside, and the balance between the upper and lower spindles is not accurate. I can't take it anymore. In addition, the number of component parts is very large, and it is difficult to make adjustments due to accumulated manufacturing errors of each part. Furthermore, the number of component parts is large, and strict manufacturing tolerances are required, resulting in an extremely high cost.

Therefore, the present invention seeks to overcome the above-mentioned disadvantages without impairing the advantages and functions of the spindle support device. That is, the feature of this invention is that a pair of upper and lower clamp members that clamp a universal coupling ring corresponding to a pair of rolls of a rolling mill from both sides are mounted on an openable and closable frame with one end pivoted to a base. The clamp member is rotatably mounted, and a spring member is interposed between both clamp members to connect them, and a spring member is interposed between either one of the clamp members and the frame, and there is no sliding part. This makes the operation of the upper and lower spindles smoother, eliminates unnecessary balance mechanisms, and allows all adjustments to be made only by adjusting the spring pressure, while the spring member interposed between the clamp member and the frame Both clamp members are held at the centering position when the rolls are reassembled, and the universal coupling is held centered so that the center of the universal coupling coincides with the center of the roll.

Hereinafter, this invention will be explained in detail with reference to an embodiment shown in the drawings.

As shown in FIG. 1, the spindle support device 1 includes a pair of symmetrical opening/closing frames 4, 4 whose lower ends are pivotally supported by hinge shafts 3, 3, respectively, on a base frame 2. An opening/closing cylinder 6 is installed between the brackets 5 and 5 erected on the top of the
It has a frame structure in which the opening/closing frames 4, 4 can be opened and closed by connecting them.

A pair of left and right clamp members 9, 9, 10, 10 for clamping universal couplings 7, 8 as roll couplings are attached to the pair of opening/closing frames 4, 4, respectively, with rotating shafts 11 located above and below with respect to the rolling pass line L. Rotatably supported by. In this case, the upper and lower rotation axes 11
are set to be equidistant l with respect to the rolling pass line L, and when the universal couplings 7 and 8 are clamped by clamp rollers 12 and 12 supported above and below the arc portion of each clamp member 9 and 10, Center 7 of universal couplings 7 and 8
_p and _8p are arranged to be equidistant with respect to the rolling pass line L.

As clearly shown on the right side of FIG. 1, the lower end 9a of the upper clamp member 9 and the upper end of the lower clamp member 10 are extended upward to provide a U-shaped fitting groove 13 at the upper end. 10a and pin 1, respectively.
4 and 15 to the balance spring device 16.

As shown in FIG. 1, this balance spring device 16 is arranged horizontally so that its axis coincides with the rolling pass line L, and as shown more specifically in FIG. A pair of spring receivers 1 having collar portions 18a and 19a at the ends in the axial direction.
8 and 19 are respectively inserted into the cylinder 17 so as to be freely displaceable in the axial direction, and a spring 20 is compressed between them.
In addition, a rod 21 longer than the cylinder 17 is inserted between the pair of spring receivers 18 and 19, and the rod 21
A pair of nuts 22, 23 are attached to the spring receivers 18, 1.
It is screwed together so as to come into contact with the outer end surface of 9. The tip of the rod 21 is screwed into a connecting fitting 24 that connects the connecting pin 14 of the upper clamp member 9, while the connecting pins 15, 15 of the lower clamp member 10 are fixed to the cylinder 17. Therefore, in principle, the lower end 9a of the upper clamp member 9 and the upper end 10a of the lower clamp member 10
(Both have arms at the same distance l from the center of each rotation shaft 11.) With a structure in which a spring 20 is interposed between the upper and lower clamp members 9 and 10, the spring 2
Balance by 0.

On the other hand, as shown in FIG. 1, for example, a cylindrical interlocking member 24 is provided protruding from the upper end side 9b of the upper clamp member 9, and this interlocking member 24 is horizontally attached to the upper part of the opening/closing frame 4. The centering spring device 25 is connected to the centering spring device 25 attached to the centering spring device 25.

As shown in FIG. 3, the centering spring device 25 has a cylinder 27 horizontally fixed to the opening/closing frame 4 by a pair of tightening rings 26, and a cylinder 27 with flanges attached to both shaft ends. A pair of spring receivers 28 and 29 are slidably fitted together to compress a spring 30 between both sliding members 28 and 29, while a long rod 31 is fitted and inserted between both spring receivers 28 and 29. It has a basic structure. The front end of the rod 31 passes through a through hole 32 that is larger in diameter than the rod 31 provided in the interlocking member 24, and then a pair of clamping plates 33 and 34 that clamp both sides of the interlocking member 24 are inserted into the rod 3.
1, and the left clamping plate 33 in the figure is supported by a nut 35 screwed onto the threaded end of the shaft end of the rod 31, while the right clamping plate 34 is attached to one of the spring receivers 28 through a spacer 36. It is supported in contact with the outer end surface. Further, a nut 37 is screwed into the threaded portion at the rear end of the rod 31 and is brought into contact with the outer end surface of another spring receiver 29.

This centering spring device 25 basically connects the upper clamp member 9 from the opening/closing frame 4 with a spring 30, a spring receiver 28, a spacer 36,
It is biased through the clamping plate 34 and the interlocking member 24 and held at the solid line position in the figure determined by the abutment by the cylinder 27 of the spring receiver 28, and the solid line position in the figure is as shown in FIG. With reference to , the center 7 _p of the universal coupling 7 is set as a centering position at a predetermined distance l from the rolling pass line L. When the upper clamp member 9 is held at the centering position, the lower clamp member 10 is balanced via the balancing spring device 16 and held at the centering position.

Further, as shown by arrow a, when the clamp member 9 is rotated counterclockwise around the rotation axis 11,
The interlocking member 24 pulls the rod 31 to the left relative to the cylinder 27 via the clamping plate 33 on the left side of the figure.
The nut 37 acts to compress the spring 30 via the spring receiver 29. Conversely, when the clamp member 9 is rotated clockwise as shown by arrow b, the spring receiver 28 on the left side is pushed inward through the clamping plate 34 and spacer 36 on the right side of the figure, compressing the spring 30. By doing so, the displacement of the clamp member 9 is absorbed.

Next, the spindle support device 1 having the above configuration will be described.
The operation of this will be explained.

First, during the rolling operation, the opening/closing cylinder 6 is operated to hold the pair of left and right opening/closing frames 4, 4 open as shown by the imaginary line T in FIG. 1, and the upper and lower universal couplings 7, 8 is rotated freely.

When the roll is worn out and needs to be replaced, the rotation of the roll is stopped and the opening/closing cylinder 6 is replaced.
is closed, the opening/closing frames 4, 4 are closed, and the upper and lower clamp members 9, 9, 10, 1 are closed.
After the upper and lower universal coupling rings 7 and 8 are clamped at 0, the rolling mill (not shown) is moved in a direction perpendicular to the pass line, and the rolls are pulled out from the universal coupling rings 7 and 8.

When pulling out this roll, there is no problem if the center of the roll originally coincides with the centering center of each universal coupling 7, 8 determined by the centering spring device 25, but if the two centers do not match. In this case, the centering spring device 25 is activated at the same time as the roll is pulled out.
acts to center the universal coupling 7 clamped by the upper clamp members 9, 9, and the lower clamp members 10, 10 follow the upper clamp members 9, 9 via the balance spring device 16 and move downward. Center the universal coupling 8.

Therefore, when setting a rolling mill equipped with new rolls on the pass line, the centers 7 _p and 8 _p of the upper and lower universal couplings 7 and 8 should be placed equidistant l above and below the pass line. If the new roll is centered and the center of the new roll matches the centers 7p _{and 8p} of the universal couplings 7 and 8, the fitting part of the roll shaft end will smoothly fit into the universal couplings 7 and 8. They will be fitted.

Also, the center of the upper and lower rolls is the rolling pass line L.
The rolling pass lines L of the centers 7p _{and 8p} of the universal couplings 7 and 8 are equidistant from each other.
If the distance is different by ±Δl from the distance l from
8 and the upper universal coupling ring 7
is pushed up, and the lower universal coupling 8 is pushed down to displace the upper and lower universal couplings 7 and 8 by an equal distance ±Δl, respectively. In this case, the lower end 9a of the upper clamp member 9 and the upper end 10a of the lower clamp member 10 will be displaced in the same direction, and as a result, although the balance spring device 16 is moved in parallel, it will not function as a spring means. I don't work.

On the other hand, the axial centers of the upper and lower rolls set in the rolling mill are not at equal distances with respect to the rolling pass line L. For example, the axial center of the upper roll is (l+Δl ₁ ) with respect to the rolling pass line L, and the axial center of the lower roll is Assuming that the distance is (l + Δl ₂ ) (where Δl ₁ > Δl ₂ ), when the rolls are fitted, the upper universal coupling 7 moves upward by Δl ₁ , and the lower universal coupling 8 moves downward by Δl ₂ . is displaced to
As a result, the lower end 9a of the upper clamp member 9 and the upper end 10a of the lower clamp member 10 are displaced in the same direction but by different amounts. In this case, the lower end 9a of the upper clamp member 9, which has a large displacement, pulls the rod 21 of the balance spring device 16 to the left in FIG. The spring 20 is compressed through the spring receiver 19, and the difference in displacement between the two is absorbed by the compression of the spring 20.
By applying a compressive force of 0 to the upper and lower clamp members 9, 10 almost equally through the pins 14, 15, the clamping forces of both the clamp members 9, 10 are balanced.

As described above, when the displacement amounts of the upper and lower clamp members 9 and 10 are different, the balance spring device 16 absorbs the tolerance by compressing the spring 20, and at the same time applies the spring force to both clamp members. Balance can be achieved by acting equally on the members 9 and 10.

As is clear from the above description, according to the present invention, the spring provided between one clamp member and the frame can hold the universal coupling in the centering position when replacing the roll. When fitting the rolls, it is possible to make the fitting extremely smooth, and if the displacement amount of the upper and lower universal couplings is different when fitting a new roll, the spring provided between the upper and lower clamp members can be used. This makes it possible to absorb the tolerance and at the same time balance the clamping force of both clamp members, making it possible to extremely smoothly and easily fit the rolls and the universal coupling when changing the rolls, although the overall structure is simple. You will get the advantage of being able to do it.

[Brief explanation of the drawing]

Fig. 1 is a front view of the spindle support device according to the present invention, Fig. 2 is an axial horizontal sectional view of the balancing spring device shown in Fig. 1, and Fig. 3 is an axial horizontal sectional view of the centering spring device shown in Fig. 1. It is an enlarged sectional view. 3, 3... Hinge shaft, 4, 4... Opening/closing frame, 6... Opening/closing cylinder, 16... Balance spring device, 25... Centering spring device.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower clamp members that clamp a universal spindle corresponding to a pair of rolls of a rolling mill from both sides are rotatably attached to a frame that can be opened and closed with one end pivoted to a base, and the upper clamp member is The lower end portion and the upper end portion of the lower clamp member are connected through a spring member in a substantially horizontal direction while allowing rotation of both clamp members, and between either one of the clamp members and the frame. 1. A spindle support device characterized in that a spring member is interposed to urge and hold the one clamp member in a centering position.