JPH087923Y2 - Multi-stage rolling mill equipped with roll protection device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention makes the upper and lower work rolls of a rolling mill open when rolling a material to be rolled such as a stainless steel plate, a titanium plate or a titanium alloy plate which requires a hard and severe surface texture. When feeding the rolled material between the upper and lower work rolls, the purpose was to prevent the tip of the rolled material from coming into contact with the body surface of the upper and lower work rolls and causing a flaw on the roll body surface. It relates to the device.

[0002]

2. Description of the Related Art Since stainless steel sheets are required to have a beautiful surface gloss, the work roll surface of the rolling mill is required to have a surface gloss similar to that of stainless steel sheets in rolling the sheet, especially in temper rolling which is the final rolling step. To be done. Therefore, during temper rolling of stainless steel sheets, the upper and lower work rolls are opened up and down before rolling to prevent the work rolls from being damaged, and the stainless steel plates are fed between the upper and lower work rolls. . In this case, if the steel sheet is wound, has a poor shape due to ear extension, middle extension, or has an irregular fractured state at the tip of the sheet due to a cutting accident during rolling, the steel sheet If the upper and lower work rolls come into contact with the surface of the roll, the surface of the roll may be scratched or scratched. Since the work roll having this flaw cannot be used for rolling, it is necessary to re-polish the cylinder surface, and the work roll must be removed and re-polished. Such work is not only time-consuming and costly to roll, but also has a drawback that the rolling work must be stopped during that time.

A rolling roll damage prevention guide device for solving these drawbacks is shown in FIG.
The device disclosed in Japanese Patent No. 6 is known. The apparatus is provided with a vertically movable guide plate G that can be inserted between the upper and lower work rolls a and b in an open state. The guide plate G has a shape in which a tip portion is curved toward the work roll. Has become.
When feeding the material to be rolled with the upper and lower work rolls opened vertically, the guide plate G protects the material to be rolled from contacting the body surface of the roll, causing scratches on the body surface of the roll. Can be prevented.

[0004]

However, the conventional rolling roll damage prevention guide device has the following problems. Since the guide plate G is composed of a long and integral body, the movement space of the guide plate G is large, and it cannot be installed in a multi-high rolling mill having four or more stages. Since the rigidity of the guide plate G is provided only by the guide plate G, when the plate thickness of the material S to be rolled becomes thick, the collision force of the material S to be rolled becomes large, and it is necessary to make the thickness of the guide plate G thick. . Therefore, it is necessary to increase the size of the apparatus and widen the distance between the rolling rolls. Therefore, the rolling reduction time becomes long and the rolling stop time becomes long. If the guide plate G is deformed during the feeding of the material S to be rolled, it is difficult to replace the guide plate G. An object of the present invention is to provide a multi-high rolling mill provided with a compact b over <br/> le protection device can be applied in a narrow 4 or more stages rolling mill equipment installation space to solve the above problems is there.

[0005]

The present invention will be described below with reference to FIGS. 1, 2, 3 and 4. Since this device has almost the same shape in the vertical direction with the pass line A-A as a boundary, the upper part will be mainly described. In the figure, a pair of upper and lower work rolls 2 are provided in a housing 1 of a multi-stage rolling mill.
The auxiliary roll 3 is installed with the roll neck portions at both ends supported by the work roll chock 4 and the auxiliary roll chock 5, respectively. On the entrance side of the housing 1, a roll protection device according to the present invention is arranged.

A pass line A-A is provided on the entrance side of the housing 1.
Previously narrow and becomes like the upper and lower fixed guide plate 6 and the gas Idoreru 7 is fixed in a direction toward the work roll across the. A guide member 9 provided with a roller 8 is movably supported on the guide rail 7 along the guide rail 7, and one end of the guide member 9 is connected to a rod of a cylinder 10 fixed to the housing 1 via a pin. , The other end is guide plate 1
It is connected to the roll protection plate 12 via 1. The side surface of the work roll of the roll protection plate 12 is covered with an elastic body 13 made of rubber, vinyl, or the like. As shown in FIG. 3, the guide plate 11 and the roll protection plate 12 are detachably connected by bolts 14. As shown in FIG. 4, the fixed guide plate 6, the guide plate 11, and the roll protection plate 12 are longer in the work roll axial direction than in the plate passing direction.

[0007]

Operation: The work roll chock 4 and the auxiliary roll chock 5 are operated to open the work roll 2 and the auxiliary roll 3 as shown in FIG. Then insert the cylinder 10 Shin <br/> by moving the guide member 9 as shown in FIG. 2, the guide plate 11 and roll protective plate 12 roll protective plate 12 is moved toward the work roll 2 between the upper and lower work rolls Let When the material S to be rolled is fed in this state, the leading end of the material S to be rolled advances while being guided to the pass line by the fixed guide plate 6 and then the guide plate 11, and passes between the roll protection plates 12 and 12. Pass the plane.

In the present invention, the portion of the fixed guide 6 which receives a relatively large impact due to the collision of the tip of the material to be rolled and the portions of the guide plate 11 and the roll protection plate 12 which have a relatively small impact force have a separate structure. Therefore, since a space space can be secured around the auxiliary roll 3, it can be attached to a multi-high rolling mill having four or more stages. Especially, it can be installed even in a 6-high rolling mill where the space is narrow. Further, by adopting the separate structure as described above, each member can be designed with dimensions according to the required function, so that the device can be made compact.

Further, as shown in FIG. 3, since the work roll surface side of the roll protection plate 12 is covered with the elastic body 13, the steel plate collides with the roll protection plate 12 and the protection plate comes into contact with the work roll 6. Does not scratch work roll 2. Further, since the impact force at the time of collision can be mitigated, the roll protection plate 12 can be made thin. As described above, the compact protective device can surely prevent the roll damage, so that the open distance of the work roll 2 can be small and the rolling stop time for the setup adjustment can be shortened, so that the work efficiency is improved. Further, since the guide plate 11 and the roll protection plate 12 can be attached and detached by the bolts 14, the elastic body 13 of the roll protection plate 12
It can be easily replaced if it is damaged.

[0010]

According to the present invention, the roll protection device can be installed in the multi-high rolling mill, which has been difficult to install conventionally. Therefore, the shape control function of the material to be rolled and the high pressure reduction rate, which are the features of the multi-high rolling mill, can be effectively exerted, and at the same time, the scratches on the work rolls can be prevented, and the work efficiency and surface quality are improved. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is an operation process diagram of FIG.

FIG. 3 is a partially enlarged view of FIGS. 1 and 3.

4 is a plan sectional view taken along the line BB of FIG.

FIG. 5 is a side view showing a conventional device.

[Explanation of symbols]

 S Rolled material 1 Housing of multi-stage rolling mill 2 Work roll 3 Auxiliary roll 4 Work roll chock 5 Auxiliary roll chock 6 Fixed guide plate 7 Guide rail 8 Roller 9 Guide member 10 Cylinder 11 Guide plate 12 Roll protection plate 13 Elastic body 14 Bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuaki Koike, Nobuaki Koike, 3434 Shimada, Hikari City, Yamaguchi Pref., Nippon Steel Corporation Hikari Works (56) References Japanese Patent Publication Sho 50-38397 (JP, B2) 58-36406 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower fixed guide plates (6) provided on the entrance side of a housing (1) of a multi-stage rolling mill so as to narrow the direction facing the work rolls across a pass line. (6) and guide rails (7), (7),
It is possible to move along the guide rails (7), (7)
A cylinder whose upper end is fixed to the housing (1)
(10), (10) is pivotally supported by the rod and the lower end is a guide plate.
(11), a guide member (9) connected to (11 ),
And (9), draft the plate (11), detachably connected roles protective plate (11) (12), and (12), the roll protection
The surfaces of the plates (12) and (12) on the side of the work roll were covered.
Elastic bodies (13), (13) consists of a is, moth Idoreru (7), (7) fixed guide plate is a circular arc shape (6),
Guide member provided outside (6)
(9), A multi-stage rolling mill provided with a roll protection device, which supports the upper and lower surfaces of (9) .