JPH03138005A - Prestressed universal mill - Google Patents

Abstract

PURPOSE:To recombine rolls in a short time by taking off one pin and forming a side housing so that it can revolve round the center of the other pin in the horizontal direction. CONSTITUTION:When an upper horizontal roll is removed, then, a vertical roll is taken out of a lower housing 4, the rolling-down head of a rolling-down mechanism 10 is returned to a position which is the nearest to the side housing 1 and at the same time the pin is removed to cut the relation between a roll chock 3 and a roll balance cylinder 11. One pin is taken out of the pins 6 and the side housing 1 is revolved 90 degrees round the residual pins 6 in the horizontal direction. In this way, since nothing exists on the side of the lower housing 4, the roll chock 3 and the lower horizontal roll of the vertical roll 2 can be drawn by a track and a drawing device to the side of the lower housing 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a press-dress type universal rolling mill in which rolls can be easily changed.

[Prior art] In general, in long steel rolling mills, it is common to roll a wide variety of steel materials such as H-shaped steel, angle steel, channel steel, or steel sheet piles with a large number of standard dimensions on the same rolling line, and the rolling required for this purpose is It is necessary to change the rolls easily and in a short time, and for this reason, rolling mills of various types have been developed.

The press dress type universal rolling mill was developed based on the above-mentioned needs, and its configuration is as described in Japanese Patent Publication No. 53-1.0947. The configuration of this press dress type universal rolling mill will be explained as follows based on FIGS. 6 and 7. That is, in this press dress type universal rolling mill, the housing is divided into two parts, an upper housing 31 and a lower housing 32. A pair of roll chocks 34 equipped with bearings are mounted on both window surfaces 33 of the upper housing 31 so as to be able to slide in the vertical direction. It is arranged in a state where it is rotatably supported by bearings built into a pair of roll chocks 34. A tabercotter 36 is arranged above the roll chock 34, and by appropriately selecting the thickness of the tabercotter 36, it is possible to adjust the position of the roll caliber so that it is always located on the pass line even if the diameter of the horizontal roll changes. It is possible. Furthermore, a slide roller 37 having the same slope is disposed above the tabular roller 36, and this slide roller 37 is configured to be slidable in the horizontal direction by a worm gear 39 and a motor 40 via a rotating shaft 38 having a worm. . The rolling reaction force exerted on the upper horizontal roll 35 is transmitted from the roll chock 34 to the upper housing 31, which is provided with a hanger 41, via the tabular roller 36 and the slide roller 37. Also, roll chock 3
4 is suspended above by a balance cylinder 42.

The left and right positions of the upper housing 31 and the lower housing 32 are determined by a sloped guide surface 43.
A crimp surface 45 is formed by the tension bar 44 of the book;
The upper and lower parts are integrally fastened. The horizontal reaction force due to the rotational force of the upper horizontal roll 35 is transmitted from the side of the roll chock 34 to the upper housing 31 via the wind surface 33 of the upper housing 31, and is transmitted to the lower housing 32 by the guide surface 43, and further It is transmitted to the foundation via the sole plate 46. The lowermost end surface 47 of the upper housing 31 serves as an upper guide surface for each roll chock 50 of the vertical rolls 48, 49 disposed in the lower housing 32, and prevents the roll chock 50 from moving upward. By removing the upper housing 31, the roll chock 50 can be lifted upward and replaced. Vertical roll 48.
49 is attached to the roll chock 50 via a bearing, and its rolling reaction force is transmitted to the yoke integrally formed with the lower housing 32 via the roll chock 50 and tabular rollers 51 and 52. The thickness of the tabular chock 52 is appropriately selected depending on the standard of the bar to be rolled, the roll diameter, etc., and is disposed at the rear of the roll chock 50.

The vertical rolls 48, 49 are rolled down by vertically moving the tabular roller 51 via a rod 53 using a ohm gear 54, a chain 55, and a motor 56.

The roll chock 50 is pulled outward by a roll balance cylinder 57 so as not to create a gap between the roll chock 50 and the tabular chocks 51 and 52.

Around the upper horizontal roll 58 disposed in the lower housing 32, five roll chocks, a tabular roller 6061, a rotating shaft 62, an ohm gear 63, etc. are arranged around the upper horizontal roll 58, similar to the upper horizontal roll 35 described above. By hanging the vertical roll 4849 and removing the spindle coupling, it can be lifted upward and replaced. The tension bar 44 that connects the upper housing 31 and the lower housing 32 is supported at its lower part by a lever 64 provided in the lower housing 32, and a hydraulic nut 65 is disposed in the threaded portion of the upper part of the tension bar 44. After applying hydraulic pressure to bring the upper and lower housings into close contact with each other, the nut 66 is rotated to bring the contact surfaces 67 into close contact, and then the hydraulic pressure is removed. Wheels 68 that support the entire weight of the stand are attached to the bottom of the stand, and lifting rails 6 are installed below the wheels 68 to support the entire weight of the stand.
9 is arranged to enable movement of the stand and the pull-out cart.

That is, after retracting the stand clamp 71 attached to the ram of the hydraulic cylinder 70, the six rails are raised and pulled out to insulate the stand from the sole plate 46, and then the pull-out cart on which the new roll device is mounted is moved. Then, the rail 69 is lowered at a predetermined position to engage with the sole plate 46, and then fixed with the stand clamp 71. Note that the roll lowering mechanism may be of the cock type described above or may be of the screw type.

[Problems to be Solved by the Invention] However, in the conventional press dress type universal rolling mill, the yoke (hereinafter referred to as side housing) that supports the rolling reaction force acting on the vertical rolls via the vertical roll chocks is connected to the lower housing. Since the lower horizontal roll is integrally formed, in order to lift the lower horizontal roll, it is necessary to prevent the roll end from interfering with the side housing and the lowering device installed therein. Therefore, the side housing 72 is shown in FIG. As shown in the figure, we had to create a structure that extends greatly from both sides of the stand.With this structure, the vertical roll 4
In order to maintain the required mill rigidity of 8.49, the sizes of the side housing 72 and the rolling down device 73 had to be increased, which was an uneconomical design. Further, the vertical rolls 48, 49 and the lower horizontal roll 58 must be lifted upward and then replaced, and the time required for changing the rolls cannot necessarily be ideally shortened.

This invention solves the above problems of the prior art,
The purpose of the present invention is to provide a press dress type universal rolling mill that can perform roll changes in a short time.

[Means for solving the problem] A press dress type universal rolling mill according to the present invention has the following features:
Separate the housing into upper and lower housings.
The upper horizontal roll is attached to the upper horizontal roll, and the lower horizontal roll and the vertical roll are attached to the latter.The horizontal force received by the upper horizontal roll is applied to the lower housing through the mating surface fitted into the lower housing through the upper housing. In a press dress type universal rolling mill in which the lower end surface of the upper housing is formed as a guide surface of a vertical roll chock, the side housing that supports the rolling reaction force acting on the vertical rolls via the vertical roll chock is perpendicular to the lower housing. It is configured so that it can be locked with two pins in two through holes provided in the vertical direction with an interval larger than the width of the roll chock, and by removing one pin, the side can be locked with the other pin as the center. The housing is designed to be horizontally pivotable.

[Function] The press dress type universal rolling mill according to the present invention has the following features:
Separate the housing into upper and lower housings.
The upper horizontal roll is attached to the former, and the lower horizontal roll and vertical roll are attached to the latter.The horizontal force received by the lower horizontal roll is applied to the lower housing through the mating surface fitted into the lower housing through the upper housing. In a press dress type universal rolling mill in which the lower end surface of the upper housing is formed as a guide surface of a vertical roll chock, the side housing that supports the rolling reaction force acting on the vertical rolls via the vertical roll chock is perpendicular to the lower housing. It is configured so that it can be locked with two pins in two through holes provided in the vertical direction with an interval larger than the width of the roll chock, and by removing one pin, the side can be locked with the other pin as the center. The housing is formed to be pivotable in the horizontal direction. Therefore, the side housing can be made extremely small compared to conventional ones, and the stroke of the reduction screw and roll balance cylinder can be shortened, making it possible to reduce the weight of the rolling mill and increase the rigidity of the vertical roll system. . In addition, when changing the rolls, as usual, loosen the tension bar connecting the upper and lower housings, remove the upper housing, take out the upper horizontal roll, and then remove the two pieces of wood that lock the side housings to the lower housing. By removing one of the pins and rotating the side housing 90 degrees horizontally around the remaining pin,
The vertical roll and lower horizontal roll can be pulled out horizontally along with the roll chock. This eliminates the conventional work of hoisting the vertical roll upwards and then taking out the lower horizontal roll upwards from the lower housing, so that the rolls can be changed in a short time.

[Embodiment] A press dress type universal rolling mill according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 5. FIG. 1 is a plan view of a side housing portion of a press dress type universal rolling mill according to an embodiment of the present invention, and FIG. 2 is an A-A in FIG. 1.
3 is an explanatory diagram of the vertical roll lowering mechanism and vertical roll roll balance cylinder built into the side housing, FIG. 4 is a BB sectional view of FIG. 3, and FIG. The side housing 1 of the press dress type universal rolling mill according to one embodiment of the present invention is perpendicular to the lower housing 4 at an interval larger than the width of the roll chock 3 of the vertical roll 2. It is designed to be locked to the lower housing 4 by a pin 6 fitted into two through holes 5 provided in the direction, and a hole is provided at the bottom of the pin 6 to prevent the pin 6 from being pulled out. The prevention plate 7 is pinned. This side housing 1 includes a vertical roll lowering mechanism 10 that uses a worm 8 and a ohm gear 9 to move the vertical roll 2 together with the roll chock 3 in a direction perpendicular to the pass line, and a vertical roll lowering mechanism 10 that always pulls the roll chock 3 of the vertical roll 2 toward the side housing 1. It has a built-in roll balance cylinder 11.

The vertical roll reduction machine tlllO includes the above-mentioned ohm 8, a worm gear 9, and a spline shaft 12 fitted into an opening provided at the center of the worm gear 9 so as to be slidable in a direction perpendicular to the rotational direction of the worm gear 9. , spline shaft 12
The tip of the spline shaft 12 has a convex spherical surface, and this convex spherical surface contacts the concave spherical surface of the pressure receiving surface 14 of the rolling head to apply rolling. , the lowering mechanism 10
The tip of the cylinder rod 15 of the roll balance cylinder 11 is introduced into the notch 16 provided in the roll chock 3 as shown in the cross-sectional view of FIG. It has a structure that is connected to the roll chock 3, and the pin 17
When the roll balance cylinder 11 and roll chock 3 are removed, the roll balance cylinder 11 and roll chock 3 are separated.

In such a structure of the side housing, when removing the vertical roll from the lower housing 4 after removing the upper horizontal roll, it is the same as returning the rolling head 13 of the rolling mechanism 10 to the position closest to the side housing 1. Next, remove the pin 17 and cut the edge between the roll chock 3 and the roll balance cylinder 11. Then, remove one of the pins 6 and install the side housing 1 around the remaining pin 6 as shown in Figure 5. Rotate 90 degrees horizontally. By doing this, there will be nothing on the side of the lower housing 4, so the roll chock 3 of the vertical roll 2 and the lower horizontal roll can be pulled out to the side of the lower housing 4 using a cart or a pull-out device. I can do it.

In the press dress type universal rolling mill according to one embodiment of the present invention, since the vertical roll and the lower horizontal roll can be extracted as described above, the roll assembly is more efficient than in the case of the conventional press dress type universal rolling mill. The time required for replacement is short.

Naturally, the side housings are located on each side of the lower housing, but since they are structurally the same, we will only explain one side housing.

[Effects of the Invention] According to the present invention, a press dress type universal rolling mill can be made compact, and the rolls can be changed in a short time and safely.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the side housing portion of a press dress type universal rolling mill according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a vertical roll built into the side housing. Fig. 4 is a sectional view taken along line BB in Fig. 3, Fig. 5 is an explanatory drawing of the side housing rotated 90 degrees, and Fig. 6 is an explanatory diagram of the conventional roll balance cylinder. FIG. 7 is a front view of a press-dressing universal rolling mill, FIG. 7 is a side view of a conventional press-dressing universal rolling mill, and FIG. 8 is a plan view of a conventional side housing. DESCRIPTION OF SYMBOLS 1... Side housing, 6... Pin, 8... Worm, 9... Worm gear, 10... Roll lowering mechanism, 11... Roll balance cylinder, 12...
・Spline shaft, 13... Reduction head, 15... Cylinder rod, 17... Pin.

Claims (1)

[Claims] Separate the housing into upper and lower housings.
The upper horizontal roll is attached to the upper horizontal roll, and the lower horizontal roll and the vertical roll are attached to the latter.The horizontal force received by the upper horizontal roll is applied to the lower housing through the mating surface fitted into the lower housing through the upper housing. In a press dress type universal rolling mill in which the lower end surface of the upper housing is formed as a guide surface of a vertical roll chock, the side housing that supports the rolling reaction force acting on the vertical rolls via the vertical roll chock is perpendicular to the lower housing. It is configured so that it can be locked with two pins in two through holes provided in the vertical direction with an interval larger than the width of the roll chock, and by removing one pin, the side can be locked with the other pin as the center. A press dress type universal rolling mill characterized by a housing that can be rotated horizontally.