JPH11147120A - Cold rolling mill for metallic strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of dry temper rolling and recovering a lubricating oil by preventing the dropping of the lubricating oil from the screw part. SOLUTION: A ring-shaped oil catcher 55 is attached on the upper surface of the frame part 51 of a quick-open mechanism which is suspended from the tip part of a rolling down screw 6. The ring-shaped oil catcher 55 is a L-shaped cross section in which a sealing member 56 is provided in the inside diameter part, a vertical flange is arranged on the side of the outside diameter and an oil discharging tube 57 for discharging the lubricating oil collected in the inside is arranged in a proper position.

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 for a metal strip having a reduction mechanism composed of a reduction screw and a nut, and more particularly, to a metal strip having a quick open mechanism suspended at the tip of the reduction screw. The present invention relates to a cold rolling mill.

[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. The electric rolling-type cold rolling mill typically has a rolling-down mechanism including a rolling-down screw and a nut at the upper part of the housing, and has advantages such as easier maintenance of the equipment than the hydraulic rolling-down type.

[0003] Electric rolling mills include, for example, temper rolling,
That is, it is often used in cold rolling in which the cold-rolled steel strip after annealing is subjected to shape and surface finishing, hardness adjustment, and the like. FIG. 2 is a front view showing the configuration of a general quadruple cold rolling mill. 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, and 6 is a screw down screw. , 7 are nuts and 8 is a screw-down 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 by an overhead crane, the work roll is replaced when the work roll is replaced. Floating from the upper and lower backup rolls,
It is necessary to take in and out in the axial direction of the roll. However, in a rolling mill of an electric rolling type that performs rolling by rotating the rolling screw, 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 becomes longer, A so-called quick open mechanism has been developed. This will be briefly described with reference to the drawings.

FIG. 3 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 necks at the tips of the two screw screws. The quick open frame 51 has a long plate shape, and a window is provided at a position corresponding to the draft screw, from which it projects outward, that is, on both sides of the rolling mill window, and the side thereof has a quick open liner 52.
Is a sliding rail. In the quick open liner 52, a pressure block 53 is placed at a position in contact with a central screw. The quick open liner 52 can be moved by the opening / closing 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 let the quick open liner 52 escape to the outside position, almost instantaneously by operating the cylinder, the thickness of the combination of the quick open liner 52 and the pressure block 53, for example, 100 Since the same result as when the screw is raised by up 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.
The roll change time is greatly shortened while the electric screw-down mechanism is operated to raise and lower the screw-down screw greatly.

[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 lubricating 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]

SUMMARY OF THE INVENTION The present invention relates to a metal strip cold rolling mill having a reduction mechanism comprising a reduction screw and a nut at the upper part of a housing, and a quick open mechanism suspended at the tip of the reduction screw. An oil pan surrounding the tip of the screw down screw is provided below the screw portion of the screw down, wherein the oil pan is an upper surface of a frame portion of the quick open mechanism. The oil receiver is ring-shaped, has an L-shaped cross section with a vertical flange disposed on the outer peripheral side, and has a slight gap between the inner peripheral side and the neck portion of the screw down screw. In addition, a seal member is provided in the gap portion, and the outer diameter is a metal strip cold rolling mill whose outer diameter is slightly larger than the outer diameter of the screw portion of the screw. That.

[0010] More preferably, the metal strip cold rolling mill is provided with an oil drain pipe for discharging the oil accumulated inside the oil receiver to the outside.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, an oil receiver is installed below a screw down screw using a quick open mechanism, a seal member is provided between the oil receiver and the screw down, and lubrication in the oil receiver is further provided. An oil drain pipe has been installed to discharge the oil to the outside, preventing the phenomenon that the lubricating oil in the screw down to the bottom is dripped at the bottom and improving the quality of the rolled material. It has an excellent effect of contributing to cost reduction.

[0012]

FIG. 1 shows an embodiment of the present invention. This figure is a cross-sectional view showing the vicinity of the tip of the screw, and the same reference numerals are used for those described so far. 55 is an oil receiver, 56 is a seal member, 57 is an oil drain pipe, and 61 is a neck of the screw 6.

That is, a ring-shaped oil receiver 55 is attached to the upper surface of the quick open frame 51 suspended from the tip neck portion 61 of the screw 6. The oil receiver 55 has an L-shaped cross section with a vertical flange disposed on the outer peripheral side. The inner peripheral side has a small clearance between the neck portion 61 of the screw 6, while the outer diameter has the screw 6 and the nut 7. Is slightly larger than the outer diameter of the screw portion of the screw 6 so as to receive oil dripped from the gap. Oil pan 55
Since does not rotate, a rotary seal member 56 is attached to the inner diameter portion so as to slide against the rotation of the screw 6. As a seal member, an O-ring, a lip type oil seal, or the like is preferable.

The oil receiving capacity of the oil receiver 55 is smaller than that of the oil retainer of the chock described in the prior art due to the limitation of the installation space. In order to remedy this drawback and to enable the reuse of the lubricating oil, a suitable place in the oil pan 55
An oil drain pipe 57 for discharging the oil accumulated in the oil pipe 55 is provided, and is connected to a pump or the like as appropriate, and is collected in a lubricating oil circulation system. In this manner, even if the lubricating oil supplied between the screw 6 and the nut 7 flows to the tip of the screw 6, the oil is received by the oil receiver 55. , 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.

[0015]

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

FIG. 3 is a plan view showing one half of a quick open mechanism according to the present invention.

[Explanation of symbols]

 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 51 quick open frame (frame part) 52 quick open liner 53 pressure block 54 opening and closing cylinder 55 oil receiver 56 sealing member 57 exhaust Oil pipe 61 neck

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takaaki Kobashi 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Inside the Kawasaki Steel Works Chiba Works (72) Inventor Ikko Mitsugutake Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba No. 1 Kawasaki Steel Corporation Chiba Works

Claims (4)

[Claims] 1. A metal strip having a screw-down mechanism comprising a screw-down screw (6) and a nut (7) at the top of a housing (2), and a quick-open mechanism (5) suspended at the tip of the screw-down screw (6). The cold rolling mill according to any one of claims 1 to 3, further comprising an oil receiver (55) surrounding the tip of the screw (6) below the screw portion of the screw (6). 2. The cold rolling mill for metal strip according to claim 1, wherein the ring-shaped oil pan (55) is mounted on an upper surface of a frame portion (51) of the quick open mechanism. 3. The oil receiver (55) is ring-shaped, has an L-shaped cross section with a vertical flange disposed on the outer peripheral side, and has a slight inner circumferential side between the oil receiver (55) and the neck portion (61) of the screw-down screw. 3. The metal strip according to claim 1, wherein the metal strip has a gap, and a seal member is provided in the gap, and an outer diameter is slightly larger than an outer diameter of a screw portion of the screw-down screw. Cold rolling mill. 4. The metal strip according to claim 1, wherein an oil drain pipe (57) for discharging oil accumulated inside the oil receiver to the outside is disposed in the oil receiver (55). Rolling mill.