KR101053998B1 - Hot lubrication rolling oil supply device and method - Google Patents

Abstract

The present invention provides an apparatus for supplying lubricating oil to the gap between the operation roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, the apparatus comprising: an upper operation roll and a lower operation roll in contact with the upper and lower portions of the steel sheet, respectively; An upper conveyor belt and a lower conveyor belt respectively installed above the upper roll wiper and the lower roll wiper on the rolling mill input side to apply a uniform lubricating film over the upper operating roll and the lower operating roll; Upper first and second rollers and lower first and second rollers supporting the upper conveyor belt and the lower conveyor belt on both sides; Drive unit driven by the input of external force to press and release the entire assembly consisting of the upper conveyor belt and the lower conveyor belt and the upper first, second rollers and the lower first and second rollers to the surface of the upper operation roll and the lower operation roll. Wow; And an upper spray head and a lower spray head for applying the lubricated roll oil supplied from the lubricated rolled oil supply to the upper surfaces of the upper conveyor belt and the lower conveyor belt.

Lubricated rolling oil, working roll, conveyor belt

Description

Hot Lubrication Rolled Oil Feeder and Method {HOT ROLLING LUBRICATION FLUID SUPPLIED DEVICE AND METHOD}

1 is a side view showing the configuration of a hot lubricated rolled oil supply device and a peripheral device according to an embodiment of the present invention.

2 is a plan view of a hot lubricated rolling oil supply apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawing

1: upper operation roll

1 ': Lower operation roll

2: steel sheet (rolled sheet material)

3: upper roll wiper

3 ': lower roll wiper

5: upper first roller (first roller for conveyor belt support for upper roll lubrication)

5 ': Lower first roller (first roller for supporting the conveyor belt for lower roll lubrication)

6: upper second roller (second roller for conveyor belt support for upper roll lubrication)

6 ': Lower second roller (second roller for supporting the conveyor belt for lower roll lubrication)

7: Upper conveyor belt (conveyor belt for upper roll lubrication)

7 ': Lower conveyor belt (conveyor belt for lower roll lubrication)                 

8: upper spray head (lubricated rolling oil spray head for upper roll lubrication)

8 ': lower injection head (lubricated rolling oil injection head for lower roll lubrication)

The present invention relates to a hot lubricated rolled oil supply apparatus and method.

In general, the hot lubrication rolling method in the hot rolling process is to supply the hot lubricating oil mixed with the cooling water to the gap between the roll and the steel sheet in order to reduce the friction between the roll and the steel sheet. In the case of the configured 4Hi rolling mill, an indirect method in which lubricating oil is finally supplied to the roll bite is sprayed directly onto the working roll in contact with the rolled steel sheet or sprayed on the reinforcing roll and then transferred to the working roll.

In the conventional hot lubrication rolling, the hot lubrication rolling oil supply method is spraying and supplying lubricated rolling oil to the surface of the working roll through the injection nozzle regardless of the direct or indirect type.

However, in the case of the lubricated rolling oil spraying method through the conventional nozzle, in particular, in the operating roll spraying method, it is necessary to completely remove the water film on the surface of the operating roll with the handpiece before spraying the lubricated rolling oil on the surface of the working roll. If the coolant that cools the roll flows through the gap of the cutting board due to abrasion of water, and forms a water film on the surface of the roll or acts as a barrier, even if lubricated rolling oil is sprayed on the roll, it does not reach the surface of the operating roll and is just washed with the coolant. The problem of falling occurs.                         

Normally, the wear of the repair plate is not constant in the rolling roll width direction. In this case, the friction coefficient is different by the lubricating rolling oil sprayed in the rolling roll width direction by the coolant being pushed toward the gap between the repair plate and the roll. Becomes remarkable.

On the other hand, since lubricated rolling oil is injected using an injection nozzle, clogging of the nozzle often occurs due to the influence of minute scale, water vapor, etc. in the hot rolling operation environment of the severe steel sheet, so that the supply of lubricated rolling oil in the width direction becomes uneven or especially steel sheet Uneven supply of lubricated rolled oil due to clogging of nozzles injecting lubricated rolled oil at both ends of the end may cause trouble in meandering operation.

As described above, when the wear of the cutting plate is not constant in the rolling roll width direction, but the wear is generated and the coolant flows toward the wear, the surface of the lower operation roll is wetted to form a water film. When the width direction is not constant, it is known that the rolling plate and the bite bite cause the operation problems such as meandering due to the difference in the coefficient of friction in the rolling direction.

Hot lubricated rolling oil which can fundamentally solve operational problems such as inability to supply hot lubricated rolling oil due to the formation of water film on the surface of operating roll by leakage cooling water due to uneven wear of the wiper and meandering due to uneven friction coefficient due to the uneven supply of width direction Provided are a supply device and a method.

The present invention provides a device for supplying lubricating oil to the gap between the operation roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, the upper operating roll and the lower operating roll in contact with the upper and lower parts of the steel sheet; An upper conveyor belt and a lower conveyor belt respectively installed above the upper roll wiper and the lower roll wiper on the rolling mill input side to apply a uniform lubricating film over the upper operating roll and the lower operating roll; Upper first and second rollers and lower first and second rollers supporting the upper conveyor belt and the lower conveyor belt on both sides; Drive unit driven by the input of external force to press and release the entire assembly consisting of the upper conveyor belt and the lower conveyor belt and the upper first, second rollers and the lower first and second rollers to the surface of the upper operation roll and the lower operation roll. Wow; And an upper spray head and a lower spray head for applying the lubricated roll oil supplied from the lubricated rolled oil supply to the upper surfaces of the upper conveyor belt and the lower conveyor belt.

In addition, the present invention is a method for supplying a lubricating oil to the gap between the operation roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, the same with the rotation of the upper operation roll and the lower operation roll during the hot rolling operation Press the upper conveyor belt and the lower conveyor belt to the upper operation roll and the lower operation roll, and apply lubricated rolling oil on the upper conveyor belt and the lower conveyor belt through the upper injection head and the lower injection head at the rear ends of the upper conveyor belt and the lower conveyor belt. The lubricating rolling oil applied on the upper conveyor belt and the lower conveyor belt may be sprayed on the surface of the upper operation roll and the lower operation roll to supply the gap between the upper operation roll and the lower operation roll.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

An embodiment of the present invention, in the supply of lubricating oil to the gap between the working roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, nozzle clogging or wiper caused by the supply method by the spray nozzle As a means to solve the problem of non-uniform friction coefficient due to uneven wear etc., continuous conveyor belt coated with lubricating rolling oil (lubricant) coated on both ends rollers is directly contacted with the surface of the operation roll to drive driven or lubricated rolling oil. The present invention relates to a method of introducing and applying a hot lubricated rolling oil uniformly and surely to the full width direction of an operation roll by introducing and applying the same to an operation roll surface.

1 is a side view showing the configuration of a hot lubricated rolled oil supply device and a peripheral device according to an embodiment of the present invention, Figure 2 is a plan view of the hot lubricated rolled oil supply device.

1 and 2 will be described the configuration and operation of the hot lubricated rolling oil supply apparatus according to an embodiment of the present invention.

The hot lubrication rolling oil supply device according to the embodiment of the present invention is the upper operating roll (1) and the lower operation in contact with the upper and lower portions of the steel sheet (2) in supplying the hot rolled lubricating oil in the gap between the roll and the steel sheet (2) It has a width corresponding to the width of the hot rolled steel sheet which is respectively provided on the lower part of the upper roll wiper 3 and the upper part of the lower roll wiper 3 'on the input side of the mill as a means for applying a uniform lubricating film over the roll 1'. Upper first and second rollers 5 and 6 and lower portions that support the upper conveyor belt 7 and the lower conveyor belt 7 'and the upper conveyor belt 7 and the lower conveyor belt 7' on both sides, respectively. First and second rollers 5 'and 6', upper conveyor belt 7 and lower conveyor belt 7 'and upper first and second rollers 5 and 6 and lower first and second rollers ( 5 ', 6') the entire drive assembly that is pressed and detached to the surface of the upper operating roll (1) and the lower operating roll (1 '), And an upper spray head 8 and a lower spray head 8 'for supplying lubricated rolling oil to the upper surfaces of the upper conveyor belt 7 and the lower conveyor belt 7'.

The method of applying lubricating oil to the surfaces of the upper operating roll (1) and the lower operating roll (1 ') includes the upper conveyor belt (7) and the lower conveyor belt (7'). And press the upper conveyor belt 7 and the lower conveyor belt 7 'to the upper operation roll 1 and the lower operation roll 1' and the upper first and second rollers 5 and 6 and the lower first. , It comes in between 2nd roller 5 ', 6'.

At this time, the lubricated rolling oil may be sprayed and applied through the upper spray head 8 and the lower spray head 8 'at the rear ends of the upper conveyor belt 7 and the lower conveyor belt 7' which are enclosed.

The lubricated rolling oil attached on the upper conveyor belt 7 and the lower conveyor belt 7 'is driven by pushing and contacting the surfaces of the upper operating roll 1 and the lower operating roll 1'. Upper conveyor belt 7 and lower conveyor belt 7 'between upper first and second rollers 5 and 6 and lower first and second rollers 5' and 6 'that follow the roll 1'. Lubricate the surfaces of the upper and lower operating rolls 1 and 1 'with the entrainment.

The amount of rolling lubricant delivered to the upper actuating roll (1) and the lower actuating roll (1 ') is such that the upper conveyer belt (7) and the lower conveyer belt (7') with the lubricated rolling oil are applied to the upper actuating roll (1) and the lower actuation. It adjusts by the rotational force stuck to roll 1 '.

The supply of lubricated rolled oil for transferring the lubricated rolled oil to the upper operating roll 1 and the lower operating roll 1 'surface is sprayed through the upper spray head 8 and the lower spray head 8' to feed the upper conveyor belt 7. And on top of the lower conveyor belt 7 '.

Since the nozzles used for the upper injection head 8 and the lower injection head 8 'are installed behind the conventional injection nozzles, nozzle clogging can be prevented.

The oil film attached to the upper part of the upper conveyor belt 7 and the lower conveyor belt 7 'is swept down even when invaded by the cooling water during the transfer to the upper operation roll 1 and the lower operation roll 1'. The gap between the upper operation roll 1 and the lower operation roll 1 'and the upper first and second rollers 5 and 6 and the lower first and second rollers 5' and 6 'as they are firmly attached without work. Sucked into me

The upper conveyor belt 7 and the lower conveyor belt 7 'which have a function of transferring the lubricated rolled oil may use any of steel sheets, products coated with a resin on the steel sheets, and a rubber coating.

Hot lubricated rolling oil supply method according to an embodiment of the present invention is the upper operating roll (1) and the lower operation by pressing the conveyor belt type lubricant supply device to the upper operating roll (1) and the lower operating roll (1 ') side during the hot rolling operation The lubricated rolling oil applied on the upper conveyor belt 7 and the lower conveyor belt 7 ', which is driven with the rotation of the operating roll 1', is electrodeposited on the surface of the upper operating roll 1 and the lower operating roll 1 '. It is supplied to the gap between the upper operation roll 1 and the lower operation roll 1 '.

The amount of lubricating oil electrodeposited on the surfaces of the upper operation roll 1 and the lower operation roll 1 'is controlled by the upper first roller 5 and the lower first roller which press the upper conveyor belt 7 and the lower conveyor belt 7'. Adjust by the rotational force of 5 '.

The upper wiper 3 and the lower wiper 3 as the upper conveyor belt 7 and the lower conveyor belt 7 'with lubricated rolling oil follow and rotate following the upper operating roll 1 and the lower operating roll 1'. ') The lubricated rolling oil applied to the upper surface of the upper conveyor belt 7 and the lower conveyor belt 7', even when flooded by the cooling water flowing out of the gap, is safely removed without being swept away by the cooling water. The surface of the operation roll 1 'can be reached.

The upper first roller 5 and the lower first roller 5 'and the upper operating roll 1 to adjust the amount of lubricated rolling oil adhered to the upper operating roll 1 and the lower operating roll 1' surface; The gap between the lower operation roll 1 'can be adjusted, and the upper conveyor belt 7 and the lower conveyor belt 7' are directly driven to attach to the surface of the upper operation roll 1 and the lower operation roll 1 '. Method is also possible.

The method of spraying the lubricated rolling oil at the rear ends of the upper conveyor belt 7 and the lower conveyor belt 7'in addition to the role of uniformly supplying lubricant to the upper conveyor belt 7 and the lower conveyor belt 7 ', the upper conveyor belt Cooling the lower conveyor belt 7 'and 7' serves to prevent deformation of the upper conveyor belt 7 and the lower conveyor belt 7 '.

For reference, the results of testing the hot lubricated rolled oil supply method according to an embodiment of the present invention will be described.

① Test condition

Ordinary carbon steel strip hot rolling t = 2.3mm, strip surface temperature for 4Hi mill small mills of upper and lower operating rolls 60 mm, reinforcement roll 150 mm; 900 C, strip length; 500 m, reduction ratio; 30%, rolling speed; 200 mpm.

② Lubrication condition

Conventional Water Injection method (oil injection flow rate; 0.3 l / m, oil viscosity; 99 cSt at 50 ℃), lubrication of conveyor belt.

③ Test result

In the spray injection method by the water injection method, the variation of the friction coefficient is largely shown by the wiper for blocking the roll cooling water, whereas in the case of the conveyor belt type lubricator, the influence by the roll cooling water is hardly shown and the constant friction coefficient value is shown.

As described above, the hot lubricated rolled oil supply device and method according to the present invention can secure hot plate and secure hot plate by solving the lubrication nonuniformity caused by leakage and nozzle clogging caused by the cooling water of the upper operation roll and the lower operation roll. The effect of lubrication rolling can be maximized.

Claims (3)

In the apparatus for supplying lubricating oil to the gap between the working roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, An upper operation roll and a lower operation roll in contact with the upper and lower portions of the hot rolled steel sheet, respectively; An upper conveyor belt and a lower conveyor belt respectively installed above the upper roll wiper and the lower roll wiper on the rolling mill input side to apply a uniform lubricating film over the upper operating roll and the lower operating roll; Upper first and second rollers and lower first and second rollers for supporting the upper conveyor belt and the lower conveyor belt on both sides thereof; Driven by the input of an external force, the entire assembly consisting of the upper conveyor belt and the lower conveyor belt, and the upper first, second rollers and the lower first and second rollers is pressed against the surface of the upper operation roll and the lower operation roll. A drive unit; And an upper spray head and a lower spray head for applying the lubricated rolled oil supplied from the lubricated rolled oil supply to the upper surfaces of the upper conveyor belt and the lower conveyor belt. The method of claim 1, And the upper conveyor belt and the lower conveyor belt have a width greater than or equal to the width of the hot rolled steel sheet on the input side of the rolling mill. In the method of supplying lubricating oil to the gap between the working roll and the hot rolled steel sheet during hot lubrication rolling in the hot rolling process of the steel sheet, In the hot rolling operation, the upper conveyor belt and the lower conveyor belt, which respectively follow the rotation of the upper operation roll and the lower operation roll, are pressed to the upper operation roll and the lower operation roll, respectively, and at the rear end of the upper conveyor belt and the lower conveyor belt. Lubricated rolling oil is sprayed onto the upper conveyor belt and the lower conveyor belt through the upper injection head and the lower injection head, and the lubricated rolling oil applied on the upper conveyor belt and the lower conveyor belt is electrodeposited on the surface of the upper operation roll and the lower operation roll. Hot lubrication rolling oil supply method is supplied to the gap between the upper operation roll and the lower operation roll.

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