JP3348837B2 - Cold rolling mill for metal strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold rolling mill (including a temper rolling mill) for a metal strip having a reduction mechanism consisting of a reduction screw and a nut, and more particularly, to a quick open at the tip of the reduction screw. The present invention relates to a cold rolling mill for a metal strip having a suspended mechanism.

[0002]

2. Description of the Related Art Cold rolling mills are mainly used in the production process of metal strips such as steel strips, and are broadly classified into an electric rolling type and a hydraulic rolling type according to a rolling method. A typical example of an electric reduction type cold rolling mill is one having a reduction mechanism including a reduction screw and a nut on an upper part of a housing. Electric rolling mills have been the mainstream of rolling mills until the 1960s, and are still used in temper rolling mills and the like today.

FIG. 4 is a front view showing the structure of a general quadruple cold rolling mill, wherein 1 is a bed plate, 2 is a housing,
3 is a work roll, 4 is a backup roll, 5 is a quick open mechanism, 6 is a screw down screw, 7 is a nut,
Numeral 8 denotes a rolling drive mechanism. The work roll 3 is frequently replaced for quality control. However, even when a roll changer is used, or when the roll is changed by a so-called C hook using an overhead crane, the work roll is moved up and down when the work roll is replaced. It is necessary to make it float from the backup roll and to take it in and out in the axial direction of the roll.

However, in a rolling mill of an electric rolling type in which a rolling screw is rotated to reduce the rolling, it takes a long time to raise the screw by a required dimension in the height direction, and the time required for the entire roll change is long. Therefore, what is called a quick open mechanism has been developed. This will be briefly described with reference to the drawings. FIG. 5 is a plan view showing one half of the quick open mechanism. There are a total of two screw screws for the operation side and the drive side. The quick open frame 51 is suspended by engaging with the neck portions at the tips of these two screw screws.

[0005] The quick open frame 51 has a long plate shape, and a window is provided at a position corresponding to the screw down. The window is projected outward, that is, on both sides of the rolling mill window. It is a sliding rail. Quick open liner 52
, A pressure block 53 is placed at a position in contact with the central screw. The quick open liner 52 is movable by the open / close cylinder 54 from a position immediately below the screw down screw shown in (a) to an outside position shown in FIG.

At a position directly below the screw, the quick open liner 52 is inserted between the upper backup roll chock and the screw together with the pressure block 53 to transmit the screw force. When changing rolls, first raise the screw down slightly to loosen the screw down, then release the quick open liner 52 to the outside position. Since the same result as when the screw is raised by the combined thickness, for example, 100 to 150 mm, the upper backup roll can be immediately lifted by a roll balance mechanism or the like (not shown) and the work roll can be taken in and out. Is operated to greatly raise and lower the draft screw, while the roll change time is greatly reduced.

[0007]

The temper rolling includes wet rolling in which a temper rolling oil is injected onto a sheet surface and dry rolling in which no rolling oil is used.
When dry temper rolling is performed in a rolling mill having a reduction mechanism including the reduction screw and the nut, the lubricating oil that lubricates between the reduction screw and the nut is transmitted to a roll chock or the like and is dropped on a lower roll or strip. In addition, there is a problem that defects such as local rolling failure and surface contamination occur.

In order to prevent such dripping, a method may be considered in which a wall is formed on the upper surface of the roll chock of the backup roll so as to cover the pressing screw, and the portion surrounded by the wall is oiled. However, when the quick open mechanism is provided, the space on the upper surface of the roll chock is closed, and such measures cannot be taken. An object of the present invention is to prevent a phenomenon in which lubricating oil in a screw portion of a screw is dripped to a lower portion in a cold rolling mill having a screw screw provided with such a quick open mechanism.

[0009]

The present invention SUMMARY OF] has a reduction mechanism having a reduction screw over及 beauty nut on Haujin grayed <br/> section, and a quick open machine front end of the pressure screw over
With a configuration, a cold rolling mill of the metal strip, before
It has an oil seal for sealing between the serial reduction screw over and said nut, and provided to conduct the oil discharge port for discharging the oil accumulated on the oil seal to the interior of the nut This problem has been solved by a cold strip rolling mill for metal strips.

[0010] In addition, pressure screw over to the top of Haujin grayed,
Has a rolling mechanism having a nut及 beauty key, and with a quick open Organization on the tip of the pressure scan <br/> Cru over, a cold rolling mill of the metal strip, the pressure screw over
Has an oil seal for sealing between the said nut and,
And an oil discharge port for discharging the oil accumulated on the oil seal
The is had to solve the above problems by the cold rolling mill of the metal strip, characterized in that provided in conduction inside the nut contact and the key.

[0011]

According to the present invention, an oil drainage mechanism is provided on the nut of the screw down which does not hinder the quick open mechanism. The phenomenon of dripping on the rolled material was prevented, the lubricating oil was not applied to the rolled material, and the quality of the rolled material was improved. In addition, it is possible to obtain an excellent effect that the conventionally discarded lubricating oil is recovered to contribute to reduction of maintenance cost.

A preferred embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing the vicinity of the tip of the screw, FIG. 2 is an external view thereof, and FIG. The same reference numerals are used for those described above. In addition, for simplicity, in FIG.

According to the present invention, the lubricating oil is prevented from flowing down onto the upper surface of the quick open frame 51 which is suspended from the tip neck portion 61 of the screw-down screw 6. Screw 6
Oil seal that slides with the thread of the oil seal 10
Is provided. As a material of the oil seal 10, a normal rubber (such as NBR) may be used. Conventionally, it is said that it is difficult to seal an object that rotates and moves up and down like a screw with rubber or the like, and an oil seal is not often used for preventing oil leakage in a vertical direction, but in the case of the present invention, The amount of elevation per screw rotation may be relatively small (about 15 mm / 1 rotation or less), and there is no particular problem.

The contact portion of the screw with the oil seal may be made flat (cylindrical surface) by removing the thread. Further, a dust seal (not shown) may be provided outside the oil seal. This oil seal can effectively prevent the lubricating oil from flowing below the nut.

However, in this state, the oil seal 10 (the oil seal 10, the screw 6 and the nut 7)
In the present invention, the lubricating oil drains out to the nut 7 because the lubricating oil accumulated in the
12 is provided to be conductive. The oil drain hole 12 is also provided in the key 11 for stopping the rotation of the nut 7, and both oil drain holes are connected to each other so that oil is drained from the oil drain port 13 to the outside.

The oil drain hole 12 allows the screw 6 to be lowered.
The lubricating oil 9 accumulated between the nut and the nut 7 can be smoothly discharged from the side of the housing. In FIG.
Although the treatment of the lubricating oil discharged from the key 11 is not shown, it can be effectively reused by providing a lubricating oil collecting device. Note that the object of the present invention is achieved even if oil is directly drained from the nut portion to the lower surface.

However, when the oil is drained directly to the lower surface from the nut portion, an oil receiver or an oil drain pipe is provided at the oil drain to prevent the oil from dripping onto the work roll or the metal strip (so as not to interfere with the quick open liner). It will be installed, but if oil is drained through a nut and a key, it is easy to provide an oil drain port on the side of the housing,
Such trouble is not required. For this reason, the equipment cost is reduced, and since it is not necessary to reconnect the oil drain pipe every time the nut is replaced, the work efficiency is improved.

The oil drainage hole 12 can be provided through a nut (or a nut and a key) and a housing. Thus, the screw 6 and the nut 7
Even if the lubricating oil supplied between them flows into the lower end of the screw 6, the oil is received by the oil seal 10, so that it does not drip onto the lower quick-open mechanism, roll, or rolled material. Dry temper rolling can be performed. Further, the present invention is not only effective when performing dry temper rolling, but also when performing wet temper rolling or general cold rolling, lubricating oil for temper rolling oil or cold rolling oil. It is effective in terms of both quality and basic unit because it can avoid mixing of lubrication and can collect and circulate the lubricating oil as it is.

[0019]

According to the present invention, even in a cold rolling mill having a quick open mechanism, it is possible to prevent a phenomenon that lubricating oil is dripped on a rolling section, and for example, the quality in dry pass rolling is improved, and It has excellent effects such as saving of lubricating oil.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the vicinity of the tip of a draft screw showing an embodiment of the present invention.

FIG. 2 is an external view of the vicinity of a tip end of a draft screw showing an embodiment of the present invention.

FIG. 3 is a bottom view showing the vicinity of a nut according to the embodiment of the present invention.

FIG. 4 is a front view showing a configuration of a quadruple rolling mill according to the present invention.

FIG. 5 is a plan view showing one half of a quick open mechanism according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 Bed plate 2 Housing 3 Work roll 4 Backup roll 5 Quick open mechanism 6 Screw down screw 7 Nut 8 Screw down drive mechanism 9 Lubricating oil (oil) 10 Oil seal 11 Key 12 Oil drain hole 13 Oil drain 51 Quick open frame (frame part) ) 52 Quick open liner 53 Pressure block 54 Opening / closing cylinder 61 Neck

Continuation of the front page (56) References JP-A-1-284415 (JP, A) JP-A-11-147120 (JP, A) JP-A-61-162309 (JP, U) JP-A-58-157205 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 31/24 B21B 31/08 F16N 31/00

Claims (2)

(57) [Claims] 1. A has a reduction mechanism having a reduction screw over及 beauty Na <br/> Tsu preparative to Haujin grayed upper portion, and with a quick open Organization in <br/> tip of the pressure screw over, a cold rolling mill of the metal strip, the rolling screw over said nut
It has an oil seal for sealing between the bets, and the nut oil discharge port for discharging the oil accumulated on the O <br/> stylesheet Le
Cold rolling mill of the metal strip, characterized in that provided in conduction inside the bets. 2. The method of claim 1] Haujin grayed top of the pressure screw over, nuts
Has a rolling mechanism having a preparative及 beauty key, and with a quick open Organization on the tip of the pressure subscription <br/>-menu, a cold rolling mill of the metal strip, and the pressure screw over Previous
It has an oil seal for sealing between the serial nut, and the oil discharge port for discharging the oil accumulated on the oil seal
Cold rolling mill of the metal strip, characterized in that provided in conduction inside the nut contact and the key.