JPS60238009A - Roll oscillation device of rolling mill - Google Patents

Abstract

PURPOSE:To prevent a roll mark, etc. by providing freely attachably and detachably an oscillating frame which is vertically movable and moving back and forth an intermediate roll in the direction opposite from each other in the axial center direction. CONSTITUTION:The oscillating frame 10 which is slidable in the vertical direction by a cylinder 17 is provided to the outside side face of a backup roll frame 5 and an arm 12 is supported freely turnably around a shaft 11. The rotating ring of the arm 12 is fitted into the square hole 3d of the journal box 3d of the intermediate roll 3 and thereafter the arm 12 is oscillated by a cylinder 16, then the boxes 3d, 3c and the roll 3 are moved back and forth in the axial direction. No roll marks are therefore generated to the roll 3. The transfer of the roll mark to the material to be rolled is thus eliminated. The exchange of the roll 3 is made easy according to the above-mentioned method.

Description

[Detailed description of the invention] The present invention prevents roll marks during rolling.

This invention relates to a roll oscillation device that eliminates differences in gloss between rolled materials. .

As shown in Fig. 1, the multi-stage cluster rolling mill has an upper roll group and a lower roll group arranged vertically symmetrically, sandwiching the rolled material 01, and the upper and lower roll groups sandwich the rolled material 01 tl.
- It is composed of a set of two intermediate rolls 03 that support the work rolls 02 that are directly rolled, and a plurality of reinforcing rolls 04 and 05 that support the intermediate rolls (2) 3.

As shown in FIG. 2 (&) from the 1-1 arrow view in FIG. It is rotatably supported by one roll shaft 06.

In recent years, from the viewpoint of improving productivity and saving energy, there has been a demand for high-reduction rolling mills that can significantly reduce plate thickness in one rolling process. There are also many. Therefore.

A high pressure is applied to each of the reinforcing rolls 04 and 05, which are divided into a plurality of pieces.

However, when a high pressure is applied to the reinforcing rolls 04 and 05, partial concentrated pressure is applied to the outer peripheral surface of the intermediate roll 03 because the reinforcing roll 04 is cylindrical. That is, as shown in FIG. 2(a), the reinforcing roll o
The surface pressure at the portions in contact with both ends of 4 is maximum. Therefore, when the rolling mill is operated for a long time, as shown in FIG. 07 is transferred to the work roll 02, and even transferred to the rolled material 01, and! & There are drawbacks such as streaks on the surface of the rolled material 01 and a difference in gloss, which deteriorates the quality of the product. Therefore, various proposals have been made as a rolling force method to solve this problem and prevent the occurrence of roll marks.1 The present inventors have already proposed a method of rolling while moving the intermediate roll forward in the axial direction ( He proposed a patent application (Sho 58-13 s206). And roll onlay 7yo/ that incorporates this method
A word about the equipment.

Various methods were considered, but no suitable device configuration was found. For example, in a rolling mill where one force of a hydraulic device installed outside the mill housing is coupled to the mill housing, the other force is coupled to a roll chock, and the cylinder or piston of the hydraulic device is actuated to adjust the movement of the rolls. (Japanese Patent Publication No. 54-43991), but in such a rolling mill, one force of the hydraulic device is connected to the mill housing, so
2) It takes too many man-hours to manufacture the housing nog, it is extremely costly when modifying an existing machine, and it is inconvenient to replace the rolls. 1. The present invention has been developed in view of the above-mentioned prior art. The object of the present invention is to provide a roll oscillation device which can be easily installed by modifying a multi-stage cluster rolling mill and is convenient for changing rolls.

The configuration of the present invention that achieves this object includes a work roll for rolling a material to be rolled, a pair of intermediate rolls that support the work roll, and a plurality of reinforcing rolls that support the intermediate roll and are divided in the axial direction. A roll oscillation device is provided in a multi-stage cluster rolling mill in which a group of rolls consisting of a group of rolls are arranged symmetrically with respect to a material to be rolled, and reciprocates the intermediate roll in the axial direction of the intermediate roll during rolling. A bearing box rotatably fitted to both ends of the intermediate roll is supported by the intermediate roll frame so as to be slidable in the axial direction, and a bearing cover having a square hole is attached to the bearing box.

A vertically movable on-rating frame is detachably attached to the outer surface of the reinforcing roll frame, and the oscillation arm is equipped with a rotary ring at its tip that fits into the square hole of the bearing cover. The invention is characterized in that a reciprocating hydraulic cylinder is provided which is pivotally supported and connected to the rear end of the suspension arm to swing the suspension arm.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows a multi-stage cluster rolling mill equipped with the O7 rolling machine of this embodiment. As shown in the figure, the multi-stage cluster rolling mill has an upper roll group and a lower roll group arranged vertically symmetrically, sandwiching the material 1 to be rolled, and the upper and lower roll groups directly roll the material 1 to be rolled. A work roll 2, a set of two intermediate rolls 3 that support this work roll 2, and a plurality of reinforcing rolls 4.4' that support this intermediate roll 3.
It consists of The reinforcing rolls 4, 4' are each divided into a plurality of pieces in the axial direction, and fixed shafts 4a, 4
It is rotatably supported by the reinforcing roll frame 5 via a'.

In a multi-stage cluster rolling mill having the following configuration.

In this embodiment, a pair of upper and lower intermediate rolls 3 that support a pair of upper and lower work rolls 2 are reciprocated relative to the adjacent rolls and the upper and lower rolls in the axial direction in opposite directions. The roll-o-7 rayon device ftM is removably installed on the roll frame 5 so that the speed can be freely controlled. That is, as shown in FIG. 4, the end 3a of the intermediate roll 3 has a bearing 3b,
3b' and is supported by the bearing box 3C.

The bearing box 3cV (has a bearing cover 3d bolted to it. The bearing box 3C is supported by an intermediate roll frame 6 so as to be slidable in the direction of the roll axis, and the frame 6 is movable up and down on the inner surface of the housing 9. A square hole 31 is formed in the bearing cover 3d.

Next, on the outer surface of the reinforcing roll frame 5, an offrating frame 10 that can slide in the vertical direction is removably attached to the offrating frame 10 by a shunting hydraulic cylinder 17. Forked O-7 Ray'
An arm 12 is rotatably supported around a shaft 11.

At the tip of this oscillation arm 12, a rotary ring 14, which is inserted into the square hole 31Vrc of the bearing cover 3d, is rotatably provided via a pin 13.

- offrating frame 10Ku, reciprocating hydraulic cylinder 16 connected to the rear end of this oscillation arm 12 to swing this oscillation arm 12;
is provided.

Therefore, as shown in FIG. 4, the square hole 3 of the bearing cover 3d
After fitting the rotary ring of the oscillation arm 12 into the oscillation arm 1, the reciprocating cylinder 16 is activated to move the oscillation arm 12ei, and the bearing cover 3d, bearing box 3c, and intermediate roll 3 reciprocate in the axial direction. Will have to move.

In this embodiment having the above configuration, the intermediate roll 3 is reciprocated in the axial direction even during rolling, as shown on the right hand side of FIG.

Since roll marks are not generated on the medium M roll 3 and are not transferred to the test rolled material 1, there is no possibility that a difference in gloss will occur in the rolled material 1.

Moreover, as shown in the left half of FIG. 3, when the intermediate roll 3 is reassembled, the oscillation 7" frame 1 () is retracted up and down by the evacuation hydraulic cylinder 17, and the rotary wheel 1 is retracted vertically.
4 can be pulled out from the square hole 5J2, making roll replacement very convenient. Also.

Reinforced roll frame 5 is also used when modifying an existing rolling mill.
The offrating frame 10 can be easily attached and detached by simply performing additional machining.

Furthermore, a sensor 18 is provided on the offrating frame 10 to detect the relative position of the intermediate roll 3, and a servo valve (not shown) that supplies oil pressure to the reciprocating oil field cylinder 1'B detects the relative position and position of the intermediate roll 3. It is also possible to control the reciprocating speed.

As described above in detail based on the examples, the present invention is an extremely compact intermediate roll oscillation device for preventing roll marks in a high-reduction multi-stage cluster rolling mill, and can be installed in an existing rolling mill. However, there were concerns about the large-scale remodeling of the housing as in the past, and costs were drastically reduced.

In the above embodiment, the present invention was applied to a cluster rolling mill with six rolls on each side, but a multistage cluster in which an appropriate number of second intermediate rolls are arranged between a one-piece reinforcing roll and an intermediate roll is also applicable. The present invention can also be applied to rolling mills and rolling mills with 4-high μ-high rolling mills, and will greatly contribute to high reduction rolling using small diameter work rolls.

Note that "reinforced roll frame" is a synonym for the commonly used roll check.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the arrangement of rolls in a conventional multi-stage cluster rolling mill.
Figure (b) is a distribution diagram of the stress applied to the intermediate roll at the position corresponding to figure (a), Figures 3 to 6 relate to an embodiment of the present invention, and Figure 3 is a diagram showing the distribution of stress applied to the intermediate roll at a position corresponding to Figure (a). A side view of the multi-stage cluster rolling mill, FIG. 4 is a front view partially showing the onlay 7-side rolling mill, and FIG. 5 is the same as that shown in FIG. 4.
○ arrow view, FIG. 6 is a view from I-1 arrow in FIG. 4. All over the page. 01.1 is the material to be rolled. +) 2, 2 is a work roll. 03.3 is an intermediate roll. 3a is the end. 3b and 3b' are bearings, 3C is a bearing box, and 3d is a bearing rose. 31 is a square hole. 04.05 and 4.4' are reinforcing rolls. 6 is an intermediate roll frame, 7 is a work roll support frame, 8 is a rolling device, and 9 is a mill housing. 10 is oscillation > 71 frame, 12 is oscillation arm. 14 is a rotating wheel. 16 is a reciprocating hydraulic cylinder. Patent applicant Mitsubishi Heavy Industries, Ltd. Sub-agent Patent attorney Shibu Mitsuishi (and 1 other person) 1 Figure 1

Claims (1)

[Claims] A roll group consisting of a work roll that rolls the material to be rolled, a pair of intermediate rolls that support the work roll, and a plurality of reinforcing rolls that support the intermediate roll and are divided in the axial direction is symmetrical with respect to the material to be rolled. In a roll rotation device that is installed in a multi-stage cluster rolling mill disposed in a rolling mill and reciprocates the intermediate roll in the axial direction of the intermediate roll during rolling, bearings are rotatably fitted to both ends of the intermediate roll. The box is supported by the intermediate roll frame so as to be slidable in the axial direction, and a bearing cover with a square hole is attached to the bearing box.On the outer surface of the reinforcing roll frame, there is an on-rating that can be moved up and down. A frame is detachably attached to the frame, and an onration arm having a rotary ring at its tip that fits into the square hole of the bearing cover is pivotally supported on the frame, and the rear end of the oscillation arm is pivoted to the frame. The orthogonal arm is connected to the