JP3065790B2 - Rolling mill, hot rolling equipment, and lubricant supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill in which work rolls excellent in sheet crown control ability are crossed, and more particularly to a rolling mill and a hot rolling facility capable of reliably lubricating between a work roll and a reinforcing roll. And a lubricant supply device.

[0002]

2. Description of the Related Art As a type of rolling mill of a type in which work rolls cross each other, there is a rolling mill in which only work rolls are crossed as described in JP-A-47-27159. In this method, it was expected that the need for various sheet crown materials could be met by crossing the upper and lower work rolls at various angles and changing the roll gap of the work rolls. However, in practice, the thrust force generated by the relative slip between the work roll and the reinforcing roll becomes extremely large, and practical use has been difficult.

A roll cross type rolling mill which has been practically used in hot rolling by solving the problem of the thrust force is disclosed in Mitsubishi Heavy Industries Technique Vol. 21, No. As described in 6, the roll set of the pair of the upper working roll and the upper reinforcing roll and the roll set of the pair of the lower working roll and the lower reinforcing roll are integrally formed, and the axes of the paired rolls are mutually crossed (crossed). Machines are known. In this method, a work roll and a reinforcing roll are formed as an integral pair, and the pair of rolls is crossed. Therefore, there is no relative slip between the work roll and the reinforcing roll, and no large thrust force is generated. As a result, the problem can be solved temporarily, but in the case of a method in which the work roll and the reinforcing roll are integrally crossed, the center of the metal chock of the reinforcing roll that directly receives the rolling load is shifted from the center of the screw down, and the moment due to this is reduced. Occurs and the smooth operation of the reduction is hindered. For this reason, a structure in which a beam having a large rigidity is provided to balance is used, but there is a problem that the rolling mill is inevitably complicated and large.

[0004] In order to more easily reduce the thrust force in the hot rolling, the applicant of the present invention keeps the reinforcing rolls parallel and crosses only the work rolls.
Invented and applied for a rolling mill that supplies a lubricant (hereinafter sometimes referred to as an inter-roll lubricant or an inter-roll lubricant) between a work roll and a reinforcing roll (Japanese Patent Application No. 3-66).
007). This method does not eliminate the relative slip between the work roll and the reinforcing roll, but reduces the thrust force itself caused by the relative slip by supplying a lubricant. By using this method, the thrust force can be reduced relatively easily, so that the structure can be relatively simplified and the rolling mill can be reduced in size.

[0005] In cold rolling, lubrication and cooling are essential for rolling, and a mixed solution (emulsion) of water and oil is generally used as a material having both of them. This emulsion is roughly divided into two types. One is a stable oil, called a stable oil, which is mainly made of mineral oil and becomes water-soluble with the aid of an emulsifier. The water and oil constituting the emulsion do not separate even if left for a long time. The other is an unstable emulsion called unstable oil, which is based on beef tallow, etc., and separates without mechanical mixing such as stirring. However, the lubricating ability is much higher than the former. large.

On the other hand, in hot rolling, cooling of rolls is an essential condition, but lubrication is not an essential condition. Therefore, the roll cooling is generally performed with water. But,
Also in hot rolling, hot rolling oil is used with the aim of reducing rolling power and rolling load and reducing roll wear. This hot-rolling oil has no effect in the above-mentioned mineral oil-based emulsion, and is effective in unstable oils such as beef tallow. As will be described later, this oil is a separate system from the cooling water to impede the biting ability of the rolled material during passing,
A method has been adopted in which the supply of oil is stopped immediately before rolling and the oil content on the work roll surface is incinerated to prepare for the next biting.

FIG. 6 shows an example of a hot rolling oil and roll coolant supply system in a conventional hot finishing mill.
First, the hot rolling oil stored in the hot rolling oil tank 150 is injected from a nozzle 151 onto a roll bite, and lubrication between the work roll 161 and the rolled material 162 is performed. Excess hot rolling oil is collected in a pan 163 below the work roll cross mill together with cooling water described later. Further, water is generally used as a cooling agent for the roll cooling, and is sprayed onto the surface of the work roll 161 by the nozzle 171. The used cooling water is recovered together with the hot rolling oil in the pan 163 below the working cross mill, and then sent to the finishing mill scale pit 172. This cooling water is called ring water and is used not only for cooling the rolls of the rolling mill but also for cooling the rolls of other equipment. Not preferred. Therefore, in the finishing mill scale pit 172, iron, scale and oil are roughly separated and removed. Then, the water is sent to the sedimentation basin 173 by the pump 172a.
It is further cleaned with the water sent by 4a. Then, the water is sucked up by the pump 173a, cooled in the cooler 175, sent to the nozzle 171 and used again as cooling water. At this time, most of the unstable oil mixed in from the pan 163 and used as the hot rolling oil contained in the cooling water in the scale pit 172 adheres to iron and scales, precipitates together with these, and is carried out by a crane or the like. Is done. Also, the unstable oil that still remains has good separability from water, and separates and floats on the upper surface of the cooling water, so that it can be recovered by a skimmer (not shown).

[0008]

The work roll cross mill in the above-mentioned prior invention mainly assumes hot rolling, and is required as lubrication between rolls of the work roll cross mill in such hot rolling. The performance is that it can be easily and uniformly applied to the roll surface, the lubrication between the rolls is good, and the performance of biting the rolled material at the time of threading is not reduced. Considering the suitability of these stable oils and unstable oils with respect to these requirements, the following is obtained.

First, since the stable oil is a stable emulsion, it can be relatively easily and uniformly applied to the roll surface, and the lubrication between the rolls is good. In addition, the stable oil adhered to the work roll is burned off by a high-temperature rolled material during rolling, and does not lower the biting performance.

On the other hand, the unstable oil of the latter is difficult to form an emulsion and is unstable, so that it is difficult to uniformly apply it to the roll surface. However, the lubricating ability between the rolls is much larger than that of the former stable oil. Therefore,
As described above, it is often used as a hot rolling oil for the purpose of reducing rolling power, rolling load, and reducing roll wear. However, unstable oil adhering to the roll surface is hard to burn off even when a high-temperature material is rolled, and has a large lubricating ability, so that the biting performance of the rolled material is significantly reduced. For this reason, the hot rolling oil is provided in a separate system from the cooling water for the rolls, the supply of oil is stopped once immediately before the pressure is released at the end of rolling, the oil on the work roll surface is incinerated, and the hot rolling oil is meshed in preparation for the next biting. At present, a method of restoring embedded performance is employed.

Incidentally, when the lubrication between the work roll 161 and the reinforcing roll 160 of the hot finishing mill shown in FIG. 6 is further lubricated, the lubrication between the work roll and the rolled material by the hot rolling oil is performed. Thus, the supply of oil cannot be stopped immediately before depressurization at the end of rolling. This is because the work rolls and the reinforcing rolls rotate between the end of rolling and the next rolled material biting, and if there is no lubrication during this period, a large thrust force is generated between the work rolls and the reinforcing rolls. To do that. Therefore, the lubrication (roll-to-roll lubrication) of this part does not deteriorate the biting performance even if it is continuously supplied.
It has been considered to use the above stable oil that can be uniformly applied to a roll. In this case, the inter-roll lubricating oil is supplied between the work roll 161 and the reinforcing roll 160 by a lubrication system separate from the hot rolling oil and the cooling water, and this portion is lubricated.

Further, in this case, it is necessary to add the above-mentioned lubricant supply system between rolls to the supply system of hot rolling oil and roll coolant of the hot finishing mill shown in FIG. The following problems occur.

That is, as described above, the stable oil which is the oil between the rolls is water-soluble,
When mixed with the cooling water from 3 or the like, it is difficult to separate the cooling water from the cooling water because the equipment cost becomes enormous and it is difficult to mix the cooling water and the stable oil in the rolling equipment. In other words, supplying lubricating oil between the rolls with a nozzle or the like in the work roll cross mill and directly flowing it under the work roll cross mill poses a serious problem in the water treatment process.
Further, if the oil between the rolls of the work roll cross mill is washed away by the roll cooling water, or if the concentration of the oil between the rolls decreases due to the mixing of the cooling water with the oil between the rolls, sufficient lubrication performance cannot be obtained.

In the above example, it is conceivable to provide a partition plate between the inter-roll lubricant supply nozzle and the roll cooling water supply nozzle to prevent interference between the inter-roll lubricant and the roll cooling water. This method is not sufficient, and it is inevitable that stable oil, which is an inter-roll lubricating oil, is mixed into the cooling water from the pan 163. In addition, since the amount of roll cooling water is enormous, and the rebound of the cooling water that hits the mill guide, metal chock, etc. jumps between the rolls, lubricating oil between the rolls is washed away by the roll cooling water, In some cases, the lubricating oil concentration was reduced, and the lubricating oil was not uniformly adhered to the roll surface and did not reliably reach the roll contact portion. For this reason, the supply amount of the inter-roll lubricating oil must be increased more than necessary to stabilize the lubricity.

An object of the present invention is to provide a rolling mill using a work roll cross mill, in which a lubricant between rolls for lubricating a contact portion between a work roll and a reinforcing roll is not mixed into roll cooling water, and a lubricant between rolls is used. A rolling mill and a hot-rolling machine that are not washed off by the cooling water of the roll and the concentration does not decrease, and the lubricant between the rolls adheres uniformly to the roll surface and reaches the roll contact area to ensure sufficient lubrication. It is to provide a rolling equipment and a lubricant supply device.

[0016]

In order to achieve the above object, a rolling mill according to the present invention includes a pair of work rolls and at least a pair of reinforcing rolls respectively supporting the pair of work rolls on a rolling stand. In a rolling mill, at least the axis of the work roll intersects the axis of the reinforcing roll in a horizontal plane, and the axes of the work rolls cross each other in a horizontal plane, between the work roll and the reinforcing roll. Having a lubricant supply means for supplying a lubricant, the lubricant supply means is disposed between the work roll and the reinforcing roll, a header block having a lubricant supply passage and a lubricant discharge passage, First sealing means provided on the header block to abut against the work roll and the reinforcing roll, respectively, and seal therebetween;
Adjusting means for causing the header block to follow the work roll intersection angle.

Preferably, the lubricating oil supply means is further provided at both ends in the width direction of the header block to prevent the intrusion of cooling water for cooling the roll from the outside by ejecting a fluid. Is provided.

Preferably, the header block has a reinforcing roll side header block facing the reinforcing roll, and a work roll side header block facing the work roll, and the adjusting means is provided on the reinforcing roll side. It is a connecting pin for connecting the header block and the work roll side header block relatively rotatably at the center.

Preferably, the apparatus further includes a lubricant tank for storing excess lubricant recovered through the lubricant discharge passage, and a pump for feeding the stored lubricant back to the lubricant supply passage. A lubricant supply system is provided.

In order to achieve the above object, the hot rolling equipment according to the present invention is provided with a plurality of rolling mills as described above so as to be capable of tandem rolling.

In order to achieve the above object, a lubricant supply device according to the present invention comprises a pair of work rolls, and at least a pair of reinforcing rolls respectively supporting the pair of work rolls, provided on a rolling stand. The axis of the work roll intersects with the axis of the reinforcement roll in a horizontal plane, and is installed between the work roll and the reinforcement roll of a rolling mill that crosses the axes of the work rolls in a horizontal plane. A lubricant supply device for supplying a lubricant between the work roll and the reinforcement roll, wherein a reinforcement roll side header block provided with a lubricant supply passage positioned facing the reinforcement roll; and A work roll side header block provided with a lubricant discharge passage facing the work roll; First sealing means for respectively abutting against and sealing between the reinforcing rolls, and at least one of the two header blocks provided at both ends in the width direction to eject a fluid to prevent intrusion of cooling water for cooling the rolls from outside. A second sealing means for preventing the second header block and a connecting pin for relatively rotatably connecting the two header blocks at a central portion.

[0022]

In the present invention constructed as described above, the lubricant is supplied between the work roll of the work roll cross mill and the reinforcing roll from the lubricant supply passage provided in the header block of the lubricant supply means. , The first contacting the work roll and the reinforcing roll provided on the header block respectively
By sealing between the header block and the work roll and between the header block and the reinforcement roll by the sealing means, the space surrounded by the work roll, the reinforcement roll and the header block near the roll contact portion is filled with the lubricant, and The lubricant lubricates between the work roll and the reinforcing roll. Excess lubricant is recovered by a lubricant discharge passage provided in the header block. Therefore, the lubricant does not leak to the outside and does not mix into the collected roll cooling water, adheres evenly to the roll surface, ensures that the lubricant reaches the roll contact portion, and lubricates the roll contact portion sufficiently Can be done. Further, since the header block follows the crossing angle of the work roll by the adjusting means, the lubricant supply means can function following the change of the cross angle of the work roll.

Also, second sealing means are provided at both ends in the width direction of the header block, and by ejecting fluid from the second sealing means, the roll cooling water enters from both ends in the width direction of the header block. It does not mix with the lubricant in the space surrounded by the work roll, the reinforcing roll, and the header block near the roll contact portion. Therefore, the lubricant is not washed away by the roll cooling water and the concentration does not decrease.

The header block has a reinforcing roll side header block facing the reinforcing roll, and a work roll side header block facing the work roll, and is connected to the reinforcing roll side header block by a connecting pin serving as adjusting means. By relatively rotating the work roll side header block at the center, the lubricant supply means can function to follow any crossing angle of the work roll, even if the cross angle of the work roll is changed. However, the lubrication of the roll contact portion can be reliably performed without leaking the lubricant to the outside.

[0025] Further, since a lubricant supply system including a lubricant tank for storing excess lubricant collected through the lubricant discharge passage and a pump for sending the stored lubricant back to the lubricant supply passage is further provided. This lubrication system can be completely independent of the supply system of other hot rolling oil or roll cooling water, and the lubricant between rolls can be mixed into the hot rolling oil or roll cooling water, And roll cooling water can be prevented from being mixed into the inter-roll lubricant.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot rolling facility equipped with a rolling mill and a lubricant supply apparatus according to one embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a system for supplying lubricating oil between rolls, hot rolling oil, and roll cooling water of a rolling mill according to the present embodiment. Note that FIG. 1 shows only one rolling mill extracted from the hot rolling equipment of FIG. 5 described below. The rolling roll of the present rolling mill 1 is provided with a pair of upper and lower work rolls 2 and a pair of upper and lower reinforcing rolls 3 respectively supporting the work rolls 2 on a rolling stand, and the roll axis of the reinforcing roll 3 is not inclined in a horizontal plane. A work roll cross mill configured such that the roll axis of the work roll 2 intersects the roll axis of the reinforcing roll 3 in a horizontal plane and the roll axes of the upper and lower work rolls 2 intersect each other in a horizontal plane. is there.

As a system for supplying the inter-roll lubricating oil, hot rolling oil, and roll cooling water, an inter-roll lubricating oil supply system 100, a hot rolling oil supply system 200, and a roll cooling water supply system 300 are provided, respectively. is set up. The inter-roll lubricating oil supply system 100 includes an inter-roll lubricating oil tank 1.
1, a pump 102, a filter 103, a lubricating oil supply device 104, and a pipeline connecting these components. The hot rolling oil supply system 200 includes a hot rolling oil tank 201, a pump 202, a hot rolling oil nozzle 203, and a pipeline connecting these. The roll cooling water supply system 300 includes a water treatment system 301, a roll cooling water nozzle 302, a pan 303, and a pipe connecting these. In order to avoid complexity, FIG. 1 schematically shows the lubricating oil supply device 104.

FIG. 2 is a diagram showing a state in which the lubricating oil supply device 303 is installed in the rolling mill 1, and FIG.
FIG. 4 is a cross-sectional view of the tip of the lubricating oil supply device 104. Note that the reinforcing roll 3 is omitted in FIG. 3 to avoid complexity. As shown in FIGS. 2 and 3, the lubricating oil supply device 104 is provided on the exit side of the rolled material 10, and is a sliding guide 21 fixed to the rolling stand 4, a hydraulic cylinder 22, and a piston housed in the hydraulic cylinder 22. 23, a frame 24 slidable on the slide guide 21 on the slide guide 21, a header block 25 connected to the frame 24 by a pivot 24A and slidable with the frame 24, and a spring 24a for urging the header block 25 toward the reinforcing roll.
It consists of. In addition, compressed air is supplied to the work roll 2 near the both ends in the width direction of the reinforcing roll side header block 25a (described in FIG.
Is buried in the nozzle 26 which is ejected to the outside in the axial direction.
Note that a water jet may be used instead of the compressed air.

The lubricating oil supply device 104 as described above is installed in a rolling mill as follows. That is, the hydraulic cylinder 2
2, the header block 25 is pushed into the contact portion between the work roll 2 and the reinforcing roll 3 from outside the mill window by supplying pressure oil from a hydraulic source (not shown). Since the header block 25 is urged by the spring 24a in the direction of the reinforcing roll 3 from the slide guide 21, the leading end of the header block 25 is first pressed against the reinforcing roll 3 side and guided by the reinforcing roll 3 while the guide roller 25 is guided. , And pressed against the contact portion between the work roll 2 and the reinforcing roll 3 for installation. This installation position is variable, and a change in the diameter of the work roll 2 and the reinforcing roll 3 is adjusted by moving the position of the header block 25 in and out according to the change.

As shown in FIG. 4, the leading end of the header block 25 has a reinforcing roll side header block 25a.
And a work roll side header block 25b, of which the reinforcing roll side header block 25a is fixed to the header block 25, and the reinforcing roll side header block 25a and the work roll side header block 2
5b is rotatably connected to a connecting pin 27 which is an adjusting means provided in the path center portion. further,
The tip of a push rod 25c (see FIG. 3) attached to the work roll chock is in contact with the work roll side header block 25b, and when the cross angle of the work roll 2 is changed, the push rod 25 is pushed by the push rod 25 to cause the work roll side. Header block 25
b rotates.

In the reinforcing roll side header block 25a,
A contact seal 28 is provided near the roll contact point and seals inter-roll lubricating oil, and a contact seal 29 is provided near the roll contact point and removes roll cooling water adhering to the surface of the reinforcing roll 3. The reinforcing roll side header block 25a is guided along the surface of the reinforcing roll 3 by these two contact seals. Further, a lubricating oil supply hole 30 is provided inside the reinforcing roll side header block 25a,
A lubricating oil supply nozzle 30a is provided at the end of the lubricating oil supply hole 30.

The work roll side header block 25b includes:
A contact seal 31 is provided for sealing the inter-roll lubricating oil and removing the roll cooling water adhering to the surface of the work roll 2. An oil discharge hole 32 is provided inside the work roll side header block 25b.

At the end of the header block 25 having the above-described configuration, the inter-roll lubricating oil is supplied to the lubricating oil supply hole 30 from the inter-roll lubricating oil tank 101 (see FIG. 1). The supplied inter-roll lubricating oil is supplied to the space 3 surrounded by the header block 25, the reinforcing roll 3, and the work roll 2.
3 and is drawn between the reinforcing roll 3 and the work roll 2 to perform lubrication therebetween. Excessive inter-roll lubricating oil unnecessary for lubrication is recovered from the oil drain hole 32 and returned to the inter-roll lubrication tank 101 again.

The reinforcing roll side header block 25a
The work roll side header block 25b is connected to the work roll side header block 25b by a connecting pin 27 provided in the path center portion. The work roll side header block 25b is provided with a tip of a push rod 25c (see FIG. 3) attached to a work roll chock. Because it is in contact, the work roll side header block 25a
The work roll 2 can rotate following any change in the cross angle. Therefore, even if the cross angle of the work roll 2 is changed, the lubricating oil supply device 10
4 can reliably perform its function. As described above, the lubricating oil between the rolls in the space 33 surrounded by the header block 25, the reinforcing rolls 3, and the work rolls 2 does not leak to the outside, does not mix with the collected cooling water, and It can be uniformly attached to the surface.

Further, as shown in FIG. 3, the compressed air is ejected to the outside in the axial direction of the work roll 2 from the nozzles 26 provided near the both ends in the width direction of the reinforcing roll side header block 25a, so that the space 33 is formed. Of the lubricant between the rolls
This prevents the header block 25 from leaking to the outside from the side of the leading end portion, and conversely, the roll cooling water from entering the space 33 and mixing into the inter-roll lubricating oil.

Returning to FIG. 1, in the inter-roll lubricating oil supply system 100, the inter-roll lubricating oil supplied between the work roll 2 and the reinforcing roll 3 from the lubricating oil supply device 104 leaks to the outside, The lubrication is performed without mixing the cooling water, and the collected excess lubricating oil is collected in the inter-roll lubricating oil tank 101. Lubricating oil tank between rolls 10
The lubricating oil between the rolls 1 is sucked up by the pump 102 and sent to the lubricating oil supply device 104 to be used again for the lubrication between the rolls. However, the lubricating oil between the rolls (stable oil) touches other than the surface of the rolls. It does not contain any impurities such as scale and iron powder.
It can be reused simply by passing it through a simple filter 103. The inter-roll lubricating oil supply system 100 has an independent circulation system completely different from the hot rolling oil supply system 200 and the roll cooling water supply system 300 described below.

In the hot-rolling oil supply system 200, hot-rolling oil stored in a hot-rolling oil tank 201 is sucked up by a pump 202 and jetted from a hot-rolling oil nozzle 203 to a roll bite, and the work roll is rolled. Lubrication between the rolling material 2 and the rolled material 10 is performed. Excess hot rolling oil is collected in a pan 303 below a work roll cross mill together with cooling water described later.

Further, in the roll cooling water supply system 300, the cooling water is jetted by the roll cooling water nozzle 302 onto the surface of the work roll 2 on the side of the rolled material 10. The used cooling water is collected together with the hot rolling oil in the pan 303 below the working cross mill, and then sent to the water treatment system 301.

The water treatment system 301 includes a finish rolling mill scale pit 304, a scale pit 305 for other facilities such as a rough mill or an outlet facility, a comprehensive water treatment facility settling tank 306, a cooler 307, pumps 304a, 305a, 306a,
And a conduit connecting them. The water recovered together with the hot rolling oil in the pan 303 is sent to a finishing rolling mill scale pit 304 while containing the scale of the rolled material and iron powder. Here, most of the contained scale and iron powder are precipitated and separated together with the hot rolling oil. The precipitated scale and iron powder are carried out by a crane (not shown) or the like, and the pump 304
The supernatant water is sucked up by a. This supernatant water is
Scale pit 305 for other equipment such as rough mill or delivery equipment
And the collected water sucked up by the pump 305a together with the settling tank 306 of the integrated water treatment facility. here,
The remaining residual scale, iron powder and the like are separated by sedimentation, and the still remaining oil such as unstable oil is separated again by flotation to be cleaned. Since this unstable oil has good separability from water, the part floating on the water surface can be collected by a skimmer (not shown). The treated water is sucked up by the pump 306a,
After being cooled in the cooler 307, it is sent to the roll cooling water nozzle 302 and used again as cooling water.

FIG. 5 shows the entire hot rolling equipment including the rolling mill according to the present embodiment described above. This rolling equipment is an example of a row of hot finishing rolling mills in which the above-mentioned rolling mills are arranged in tandem rollable seven rolls, and a system for supplying hot rolling oil, roll cooling water, and inter-roll lubricating oil of each rolling mill. Is shared. That is, in FIG. 5, reference numeral 1 denotes a rolling mill (working roll cross mill), which has a common system for supplying hot rolling oil, roll cooling water, and inter-roll lubricating oil of each rolling mill. A lubricating oil supply system 100, a hot rolling oil supply system 200, and a roll cooling water supply system 300 are provided, respectively. That is, each work roll cross mill is provided with a lubricating oil supply device 104, a hot rolling oil nozzle 203, a roll cooling water nozzle 302, and a pan 303, and the lubricating oil supply device 104 is provided via a pump 102 and a filter 103. Lubricating oil tank 101 between rolls
However, the hot-rolling oil nozzle 201 is connected to the hot-rolling oil nozzle
The water treatment system 301 is connected to the pan 303 and the pan 303. The function of the present rolling equipment is the same as in FIG.

As described above, according to the present embodiment, the inter-roll lubricating oil is supplied between the work roll 2 and the reinforcing roll 3 by the lubricating oil supply nozzle 31a, and the contact seals 28, Since the inter-roll lubricating oil is sealed by 29 and 31, and the surplus inter-roll lubricating oil is collected by the oil drain hole 32, the space 33 near the roll contact portion is filled with the inter-roll lubricating oil, and the inter-roll lubricating oil is filled. Does not leak to the outside and does not mix into the collected cooling water. Also, the reinforcing roll side header block 2
Since compressed air or water is jetted out of the header block 25 from the nozzle 26 buried near both ends in the width direction of 5 a, the inter-roll lubricating oil in the space 33 near the roll contact portion is discharged in the width direction of the header block 25. It does not leak to the outside from both ends, and conversely, the roll cooling water does not mix into the inter-roll lubricating oil. Therefore, the lubricating oil is not washed out by the roll cooling water or the concentration is not reduced, and the lubricating oil can be uniformly attached to the roll surface, and the lubrication of the roll contact portion can be sufficiently performed.

The reinforcing roll side header block 25a
And the work roll side header block 25b are rotatably connected at the center by a connecting pin 19, and
Since the tip of the push rod 25c attached to the work roll chock is in contact with the work roll side header block 25b, the work roll side header block 25b follows the cross angle of the work roll 2 even if it is changed to any angle. And can reliably rotate the roll contact portion without leaking the lubricant to the outside.

In addition to the lubricating oil supply device 104, an inter-roll lubricating oil tank 101 for storing excess lubricant collected through the lubricant discharge passage 32, and a pump for feeding the stored lubricant back to the lubricant supply passage 30 The system further includes an inter-roll lubricating oil supply system 100 including a pump 102 and a filter 103, so that this system can be completely independent of other hot rolling oil and roll cooling water supply systems, and the inter-roll lubricating oil is heated. It is possible to prevent the hot rolling oil and the roll cooling water from being mixed into the inter-roll lubricating oil.

The same effect can be obtained in a hot rolling facility in which a plurality of rolling mills are arranged so as to be capable of tandem rolling.

[0045]

According to the present invention, the lubricant is supplied by the lubricant supply means, the work roll and the reinforcing roll are sealed between the header block and the work roll by the sealing means provided on the header block, and the excess lubricant is provided. As the lubricant is collected, the lubricant does not leak to the outside, does not mix into the collected cooling water, adheres uniformly to the roll surface, and ensures that the lubricant reaches the roll contact part and Lubrication can be performed sufficiently. Further, the adjusting means can cause the lubricant supplying means to follow the change of the cross angle of the work roll.

Further, since the second sealing means is provided at both ends in the width direction of the header block, the roll cooling water is not mixed into the lubricant.

Further, since the reinforcing roll side header block and the work roll side header block are relatively rotatably connected at the central portion by the connecting pin, the above-mentioned effect can be obtained for any cross angle of the work roll. Lubrication of the roll contact portion can be reliably performed.

Further, since a lubricant supply system is further provided, the lubrication system can be completely independent, and the inter-roll lubricant can be mixed into the hot rolling oil or the roll cooling water, or conversely, the hot rolling oil or the roll can be mixed. Cooling water can be prevented from being mixed into the inter-roll lubricant.

The same effect as described above can also be obtained in a hot rolling facility in which a plurality of rolling mills are arranged so as to perform tandem rolling.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system for supplying inter-roll lubricating oil, hot rolling oil, and roll cooling water of a rolling mill according to one embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which a lubricating oil supply device is installed in the rolling mill of FIG.

3 is a view in the direction of arrows III-III in FIG. 2;

FIG. 4 is a sectional view of a tip portion of the lubricating oil supply device shown in FIGS. 2 and 3;

FIG. 5 is a view showing the entire hot rolling equipment including the rolling mill shown in FIG. 1;

FIG. 6 is a diagram showing a system for supplying hot rolling oil and roll cooling water of a conventional rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling machine 2 Work roll 3 Reinforcement roll 4 Rolling stand 10 Rolled material 21 Sliding guide 22 Hydraulic cylinder 23 Piston 24 Frame 24a Spring 25 Header block 25a Reinforcement roll side header block 25b Work roll side header block 25c Push rod 26 Nozzle 27 Connection Pins 28, 29 Contact seal 30 Lubricating oil supply hole 30a Lubricating oil supply nozzle 31 Contact seal 32 Oil drain hole 33 Space 100 Lubricating oil supply system between rolls 101 Lubricating oil tank between rolls 102 Pump 104 Lubricating oil supply device 200 Hot rolling oil Supply system 300 Roll cooling water supply system

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takao Sakanaka 3-1-1, Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Hitachi Plant (72) Inventor Yoshihiro Maekawa 3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Hitachi Plant (56) References JP-A-5-50110 (JP, A) JP-A-5-285504 (JP, A) JP-A-5-212411 (JP, A) JP-A-5-200417 (JP, A) JP-A-5-169108 (JP, A) JP-A-11-267711 (JP, A) JP-A-61-279305 (JP, A) JP-A-3-234305 (JP) JP-A-46-1353 (JP, A) JP-A-58-61902 (JP, A) JP-B-52-17515 (JP, B2) JP-B-64-4842 (JP, B2) JP-B-sho 63-66604 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 27/10 B21B 1/22 B21B 13/14 B21B 45/02 310

Claims (6)

(57) [Claims] 1. A rolling stand comprising: a pair of work rolls; and at least a pair of reinforcement rolls respectively supporting the pair of work rolls, wherein at least an axis of the work roll is in a horizontal plane with respect to an axis of the reinforcement roll. In a rolling mill that crosses and the axes of the work rolls cross each other in a horizontal plane, the rolling machine includes a lubricant supply unit that supplies a lubricant between the work roll and the reinforcing roll, and the lubricant supply unit Is disposed between the work roll and the reinforcing roll, a header block provided with a lubricant supply passage and a lubricant discharge passage, and provided in the header block to contact the work roll and the reinforcement roll, respectively, and between them. A first sealing means for sealing; and an adjusting means for causing the header block to follow the work roll crossing angle. And rolling mill. 2. The lubricating oil supply means according to claim 1, further comprising: a lubricating oil supply means provided at both ends in the width direction of the header block to prevent intrusion of cooling water for cooling the roll from the outside by ejecting a fluid. A rolling mill comprising a second sealing means. 3. The header block according to claim 1, wherein the header block includes a reinforcing roll side header block facing the reinforcing roll, and a work roll side header block facing the work roll. A rolling mill, which is a connecting pin that relatively rotatably connects a reinforcing roll side header block and the work roll side header block at a central portion. 4. The pump according to claim 1, further comprising: a lubricant tank for storing an excess of the lubricant recovered through the lubricant discharge passage; and a pump for feeding the stored lubricant back to the lubricant supply passage. And a lubricant supply system comprising: 5. A hot rolling facility, comprising a plurality of rolling mills according to claim 1 arranged so as to be capable of tandem rolling. 6. A rolling stand comprising: a pair of work rolls and at least a pair of reinforcement rolls respectively supporting the pair of work rolls, wherein at least an axis of the work roll is in a horizontal plane with respect to an axis of the reinforcement roll. Crossed and installed between the work roll and the reinforcing roll of a rolling mill that crosses the axes of the work rolls mutually in a horizontal plane, and supplies a lubricant between the work roll and the reinforcing roll. In the lubricant supply device, a reinforcing roll-side header block provided with a lubricant supply passage facing the reinforcing roll, and a work roll-side header block provided with a lubricant discharge passage facing the work roll. When,
First sealing means provided on each of the two header blocks to abut against and seal between the work roll and the reinforcing roll, respectively, and a fluid provided at at least one end in the width direction of at least one of the two header blocks. A second sealing means for preventing intrusion of cooling water for cooling the roll from the outside, and a connecting pin for relatively rotatably connecting the two header blocks at a central portion thereof. Feeding device.