JPS62173013A - Coolant header for rolling mill - Google Patents

Abstract

PURPOSE:To improve the lubricity between work rolls and material to be rolled and the lubricity in the bite part between the rolls and the decrease the abrasion loss of the rolls by forming coolant headers in such a manner that the working positions and mounting angles thereof can be adjusted. CONSTITUTION:A guide 10 which can be advanced or retreated by a proper drive such as hydraulic cylinder is installed on the inlet side of a rolling mill above the pass line and the headers 1, 3 are provided to the front end thereof. On the other hand, the other headers 2, 4, 5, 6 are installed on the housing side of the rolling mill, While the headers 1, 3 are movable with the advance and retreat of the guide 10, the mounting positions thereof are fixed. These headers 1, 3 and 2, 4, 5, 6 are constituted adjustably in the respective mounting angles so that the angle theta can be changed in accordance with the preliminarily read roll diameter. More specifically, the angle is adjusted by rotating the header 1 around the axis thereof by the actuation of the cylinder 13. The circumferential position of the header 1 is adjusted by checking the extent of the movement of a rack 14 by a limit switch or proximity switch.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to roll coolants for rolling mills, and more particularly to adjustable runt headers.

(Prior art) A rolling mill is equipped with a coolant header on the entry side for spraying coolant onto the rolling rolls and the rolled material. Usually, the header is installed at the tip of a rolling mill guide that can move forward and backward. It consists of a header installed on the rolling mill frame side.

This coolant header is conventionally shown in Figures 6 and 7 (
The configuration was as shown in A) and (B).

That is, as shown in FIG. 6, in the case of a 6-high rolling mill having crawlers 7, intermediate rolls 8, and backup rolls 9, the rolling mill extends in the direction above the rolled material (pass line) 11 and can move forward and backward. A header 1.3 is fixed to the tip of the rolling mill guide 1o, and headers 2.4.5.6.3-1.4-1 are fixed to the rolling mill frame side, respectively.
Coolant is injected from each header at a constant distance from the mill center to each header to cool the rolling rolls.

Each such header has a large number of injection holes arranged in the width direction of the material to be rolled, as shown in FIGS. 7(A) and (B). 12, and is configured to always maintain a predetermined fixed mounting angle. Further, the guide 10 can be moved forward and backward by an appropriate mechanism, but in use, the distance from the center of the mill to each header is set to be constant as described above.

Note that although the above example illustrates the case of a six-high rolling mill, the coolant header is similarly configured in other types of rolling mills such as a four-high rolling mill.

(Problems to be Solved by the Invention) However, in any type of rolling mill, as in the case of the rolling mill shown in FIG. It is unavoidable that the roll diameter of backup roll 9 etc. changes from the roll diameter of the new roll (solid line in the figure) to the roll diameter of the discarded roll (broken line in the figure). When replacing the header with a new one (for example, a small-diameter work roll), the conventional coolant header has the following problems because its mounting position and mounting angle are fixed.

1) Lubricity between the work roll 7 and the rolled material 11 is not efficient.

2) Thermal crown control ability on the surface of the work roll 7 is reduced.

3) The lubricity between the work roll 7 and the intermediate roll 8 and between the intermediate roll 8 and the backup roll 9 in the roll-by portions 1 to 9 deteriorates.

4) Header 31 and work roll 7 for roll bite section
Since the headers 3 for the surfaces of the two are installed separately, the number of Yatsuda increases.

The present invention has been made in order to solve the problems of the above-mentioned prior art, and it is an object of the present invention to provide a coolant header that enables efficient application of roll coolant and can also cope with changes in roll diameter. This is the purpose.

(Means for Solving the Problems) In order to achieve the above object, the present invention makes it possible to adjust the header in various ways, considering that the mounting position, mounting angle, etc. of the conventional header ladder are fixed. The gist of this is that in a coolant header in which a header is installed at the tip of a rolling mill guide that can move forward and backward, the forward and stopping position of the guide is variable, and the header is moved around the header axis. A coolant header for a rolling mill, characterized in that by being rotatable, the installation angle of the header and the distance from the mill roll can follow changes in the roll diameter of the mill roll.

The present invention will be explained in detail below based on illustrated embodiments.

The most efficient way to apply roll coolant in a rolling mill is to always install the header at an angle that points toward the center of the roll, and at the bite section between the rolls, the header must be installed at the contact point between the rolls. It goes without saying that it is most efficient to apply To achieve this, it is necessary to have a configuration that can always follow the dimensional changes of the rolling rolls to which roll coolant is applied.In the present invention, the installation (operation) position and installation angle of the header are made variable, and the efficient use of roll coolant is achieved. The aim is to make the most of the information available.

(Example 1) FIG. 1 is a diagram showing an example of the present invention, and shows a configuration in which a coolant header applied to a six-high rolling mill can follow changes in roll diameter due to use. .

In the figure, 7 is a large-diameter work roll, 8 is an intermediate roll, and 9 is a backup roll. Stripping is performed until the roll diameter of the new roll (solid line) is reduced to a scrap roll with the roll diameter shown by the dotted line in the figure. 11 can be rolled. On the entry side of this rolling mill, a guide 10 is installed above the pass line, which can be moved back and forth by an appropriate drive such as a hydraulic cylinder, and a ladder 1.3 is provided at the tip of the guide 10. Note that the guide 16 may be configured so that the stop position of the forward stroke can be varied by a mechanism (see FIG. 2), which will be described later. The distance between the center of the roll and the header 1.3 is set to be L.

On the other hand, other headers 2.4.5.6 are installed on the housing (not shown) side of the rolling mill, and the headers 1.
3 is movable as the guide 10 advances and retreats, whereas the mounting position is fixed.

These headers 1.3 and 2.4.5.6 are each configured to be able to adjust the mounting angle, and the angle 0 can be changed in accordance with the roll diameter read in advance. Of course, each header can be individually adjusted to provide a unique mounting angle.

The installation angle of the header to the coolant 1 is, for example, as shown in Figure 3 (
It is adjusted by an adjustment mechanism as shown in A), (B), FIG. 4, and FIG. 5 (A), (B). Although header 1 will be described, the same applies to other headers.

The adjustment mechanism shown in FIGS. 3(A) and 3(B) is
3 as a driving source, and utilizes a combination of a rack 14 and a pinion 15.The shaft of the header 1 is connected to the pinion 15, and the header 1 is rotated around the shaft by the operation of the cylinder 13, thereby adjusting the angle. conduct. The position of the header 1 in the circumferential direction is determined by checking the amount of movement of the rack 14 using a limit switch or a proximity switch. Note that 16 is a rack case.

FIG. 4 is a diagram showing another adjustment mechanism, and the angle adjustment of the header 1 is performed by using the motor 17 as a driving source and applying rotation to the header 1 using a combination of a speed increaser 18 and a pulse transmitter 19. It is something. Of course, the position of the header 1 in the circumferential direction can be set using the pulse generator 19.

FIGS. 5(A) and 5(B) are diagrams showing still another adjustment mechanism, in which the angle of the header 1 is adjusted by using a cylinder 20 as a driving source, applying rotation to the header 1 via a lever 21, and using a limit switch or The position is adjusted using a proximity switch.

Each header whose angle is adjusted in this way applies roll coolant at a predetermined angle to the roll surface and the bit part between the rolls. In particular, the header 3.4 applies coolant to the surface of the work roll 7 and to the work roll 7 and the intermediate roll. 3-1, which is a header that can also be used to supply coolant to the bit part between work roll 7 and intermediate roll 8.
, -7=4-1, the number of headers can be reduced by one.

(Example 2) Fig. 2 is a diagram showing another example of the present invention, in which the work roll 7 has an extremely small diameter.
This is an application example of a rolling mill in which the large-diameter work rolls shown in the figure are rearranged and used for other purposes. In this embodiment, the roll coolant is applied efficiently by adjusting the mounting angle of the header, and the efficiency is further improved by applying the coolant close to the roll.

Since the rolling mill shown in FIG. 2 uses extremely small-diameter work rolls 7, it is particularly necessary to place the header 1.3 close to the roll side. To this end, a position adjustment mechanism is provided in the forward/backward driving device (eg, cylinder 22) of the guide 10 that can move forward and backward to which the header 1.3 is attached. As shown in the figure, this position adjustment mechanism consists of a nut 23 and a stopper 24, and the stopper 24 is positioned via the nut 23 by a drive mechanism (not shown), and the distance between the roll and the header is adjusted to L (in the embodiment). 1) to Q (Q<L).

Note that the other headers 2.4, S, and 6 are fixedly installed on the rolling mill housing side in the same manner as in the first embodiment shown in FIG.

Further, each header is configured so that the mounting angle can be adjusted in the same manner as in the first embodiment. Therefore, even if the diameter of each of the small-diameter work roll 7, intermediate roll 8, and backup roll 9 decreases from the new roll shown by the solid line in the figure to the discarded roll shown by the broken line, each header is 1, the mounting angle θ1 can be adjusted as appropriate.

(Effects of the Invention) As detailed above, according to the present invention, the operating position and mounting angle of the coolant header can be adjusted, so the lubricity between the work roll and the rolled material and the roll-to-roll It is possible to improve the lubricity of the biting part between the rollers, reduce the amount of wear on the rolls, shorten the heat-up time of the rolls, and improve the multi-crown control ability. Furthermore, it is also possible to reduce the number of headers by one.

[Brief explanation of drawings]

1 and 2 are front views showing one embodiment of the present invention, respectively.
) is a diagram showing the rotation mechanism of the header in one embodiment of the present invention, FIG. 3(A) and FIG. 5(A) are side views, and FIG.
Figures (B), 4 and 5 (B) are front views, Figure 6 is a front view of a conventional example, and Figures 7 (A) and (B) are views of conventional fixed headers. , (A) is a side view, and (B) is a front view. 1-6...Header, 3-1.4-1...Header-7...Work roll, 8...Intermediate roll, 9...Backup roll, 10...Guide, 11...・Rolled material (pass line), 13...Cylinder 14...Rack, 15...
・Pinion, 17...Motor, 18
...Reducer, 19...Pulse transmitter, 20.22
... cylinder, 21, = lever,
23...Nara-to, 24...S1-Tsuba-0 Patent applicant Takashi Nakamura, Patent attorney representing Kobe Steel, Ltd. Figure 3 (A) (B) Figure 4 (A) (B ) Figure 6 Figure 7 (A) (B)

Claims (1)

[Claims] In a coolant header in which a header is installed at the tip of a rolling mill guide that can move forward and backward, the forward stop position of the guide is made variable and the header is made rotatable around its header axis, thereby reducing the roll of the rolling mill. A coolant header for a rolling mill, characterized in that the installation angle of the header and the distance from the rolling rolls can be adapted to follow changes in diameter.