CN209866979U - Hydraulic screwdown for rolling mill - Google Patents
Hydraulic screwdown for rolling mill Download PDFInfo
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- CN209866979U CN209866979U CN201920361953.9U CN201920361953U CN209866979U CN 209866979 U CN209866979 U CN 209866979U CN 201920361953 U CN201920361953 U CN 201920361953U CN 209866979 U CN209866979 U CN 209866979U
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Abstract
The utility model discloses a hydraulic pressure screw-down device for rolling mill, it includes a screw-down mechanism, an complementary unit, a connecting axle, a position monitoring part and a controller, wherein the screw-down mechanism with complementary unit is in step controllably connected the controller, wherein the position monitoring part includes a first position monitor, a second position monitor and a temperature monitor, wherein the position monitor the second position monitor and the temperature monitor respectively by the electricity be connected in the controller.
Description
Technical Field
The utility model relates to a screw-down device especially relates to a hydraulic pressure screw-down device for rolling mill.
Background
Rolling mills are widely used for rolling of metals. In the production of steel strip, on the one hand, both the length and the thickness of the steel strip have certain requirements, wherein the rolling mill is able to automatically cut the steel strip when the length of the steel strip reaches a predetermined value. For the thickness of the steel strip, the strand is pressed by a press. In the prior art, there are two main types of apparatuses for pressing steel billets, one of which is a mechanical pressing apparatus, and the other is a hydraulic pressing apparatus such as a hydraulic cylinder. In general, in order to save cost, a first mechanical pressing mode is adopted by various manufacturers to press continuous casting billets. However, when the continuous casting slab is pressed by the hydraulic pressing mode, the thickness of the steel strip formed after the continuous casting slab is pressed is determined by the pressure output to the continuous casting slab by the hydraulic cylinder of the pressing device. Therefore, if the thickness of the steel strip needs to be ensured, the pressure on the continuous casting billet output by the hydraulic pressing device is kept stable firstly. The hydraulic press apparatus is capable of outputting a greater pressure and has a better stability than the first mechanical press apparatus.
However, the temperature of the environment where the existing hydraulic pressing equipment is located is generally higher, and at this time, the volume of the liquid in the hydraulic pressing equipment changes, which further causes the viscosity of the liquid in the hydraulic pressing equipment to change, so that the pressure output by the hydraulic pressing equipment is unstable, and finally the thickness of the steel strip formed after the continuous casting slab is pressed does not meet the expected requirement.
In addition, because in different seasons, the temperature difference is large, and for hot summer, the temperature in the environment where the hydraulic pressing equipment is located is higher than that in other seasons, therefore, if the power output by the hydraulic cylinder is to be stable, the hydraulic pressing equipment needs to be adjusted, but because the pressure output by the hydraulic pressing equipment corresponds well to the thickness of the steel strip formed after the continuous casting billet is pressed, if the hydraulic pressing equipment is adjusted, the thickness of the steel strip cannot accurately correspond to the pressure output by the hydraulic pressing equipment finally. Therefore, in the prior art, a certain tolerance still exists between the actual thickness of the steel coil formed by rolling the continuous casting slab through the rolling mill and the thickness of the steel coil required by an end user, and if the tolerance is large, the batch of steel coils can be scrapped.
Although, confirm the coil of strip thickness that forms through setting up position sensor monitoring screwdown's position of pushing down among the prior art, because the viscosity of liquid is different in the pneumatic cylinder, consequently, when screwdown pushed down the position that arrives and reached standard position, the pressure to the continuous casting billet is different with pressure that sets up in advance to the thickness that leads to the coil of strip that the continuous casting billet is pressed the back and forms also can produce the error.
SUMMERY OF THE UTILITY MODEL
One of the primary advantages of the present invention is to provide a hydraulic screw down for a rolling mill, wherein the hydraulic screw down for a rolling mill is capable of reducing the error in the thickness of the resulting steel strip.
Another advantage of the present invention is to provide a hydraulic screw down device for a rolling mill, wherein the hydraulic screw down device for a rolling mill can die-cast a continuous casting billet in different temperature environments to form a steel coil with different thickness.
Another advantage of the present invention is to provide a hydraulic screw down for a rolling mill, wherein the hydraulic screw down for a rolling mill is capable of improving the yield of a steel coil formed by the hydraulic screw down for a rolling mill by automatically calibrating the error caused by the difference in viscosity of the liquid.
Another advantage of the present invention is to provide a hydraulic screw down for a rolling mill, wherein the hydraulic screw down for a rolling mill is through setting up an auxiliary mechanism and a screw down, and through the contrast the auxiliary mechanism with the distance that the screw down pushed down, and then can confirm the error that causes because of the viscosity difference of liquid.
To achieve at least one of the above advantages, the present invention provides a hydraulic screw down device for a rolling mill, comprising:
a depressing mechanism, wherein the depressing mechanism includes a depressing body, wherein the depressing body includes a first hydraulic cylinder, a first movable body, and a first liquid pipe, wherein the first movable body is slidably provided to the first hydraulic cylinder, wherein the first liquid pipe is communicated with the first hydraulic cylinder, wherein the first movable body is driven to move downward when hydraulic oil is guided from the liquid pipe to the hydraulic cylinder, wherein the first movable body is driven to move in an opposite direction when hydraulic oil is guided out of the hydraulic cylinder from the liquid pipe;
an auxiliary mechanism, wherein the auxiliary mechanism comprises a mechanism body and an auxiliary component, wherein the auxiliary component comprises a second hydraulic cylinder, a second movable body and a second fluid pipe, wherein the second movable body is synchronously and slidably arranged with the first movable body on the second hydraulic cylinder, wherein the second fluid pipe is communicated with the second hydraulic cylinder, wherein the auxiliary mechanism further comprises a thermostatic component, wherein the thermostatic component can form a thermostatic chamber, wherein the second fluid pipe is coaxially arranged behind the thermostatic chamber formed by the thermostatic component, and a thermostatic channel is formed between the thermostatic component and the second fluid pipe, and is used for circulating thermostatic fluid in the thermostatic channel;
a connecting shaft, wherein the pressing mechanism and the auxiliary mechanism are symmetrically arranged on two sides of the connecting shaft;
a position monitoring part, wherein the position monitoring part includes a first position monitor, a second position monitor, and a temperature monitor, wherein the first position monitor is provided to the depressing body, wherein the second position monitor is provided to the mechanism body, wherein the first position monitor and the second position monitor are used to detect a position of the depressing part and a position of the auxiliary part, respectively, wherein the temperature monitor is provided at an inlet of the first liquid pipe for monitoring a temperature of hydraulic oil in the first liquid pipe of the depressing mechanism; and
a controller, wherein said depressing mechanism and said assisting mechanism are synchronously controllably connected to said controller, wherein said position monitor, said second position monitor, and said temperature monitor are electrically connected to said controller, respectively.
According to an embodiment of the present invention, the pressing mechanism includes a first motor and a first coupling. The depressing body is connected to the first motor movably up and down by the first coupling, wherein the assisting mechanism includes a second motor and a second coupling, and wherein the mechanism body is connected to the second motor movably up and down by the second coupling.
According to an embodiment of the present invention, the position monitoring part includes a third position monitor and a fourth position monitor, and the third position monitor and the fourth position monitor are electrically connected to the controller, respectively.
According to an embodiment of the invention, wherein the depressing mechanism comprises a first brake, wherein the auxiliary mechanism comprises a second brake, wherein the first motor and the second motor are brakable connected to the first brake and the second brake, respectively.
According to an embodiment of the invention, wherein the first position monitor and the second position monitor are implemented as a position encoder.
According to an embodiment of the invention, the third position monitor and the fourth position monitor are implemented as a tacho encoder.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.
Drawings
Fig. 1 shows a block diagram of a hydraulic screw down for a rolling mill according to the present invention.
Fig. 2 shows a schematic view of a part of the structure of a hydraulic screw down for a rolling mill according to the present invention at an angle.
Fig. 3 shows a schematic view of a part of the structure of a hydraulic screw down for a rolling mill according to the present invention at another angle.
Fig. 4 shows a schematic partial structure diagram of an auxiliary structure in a hydraulic hold-down device for a rolling mill according to the present invention.
Fig. 5 shows a flow chart of a method of calibrating a hydraulic screw down for a rolling mill according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to 4, a hydraulic screw down apparatus for a rolling mill according to a preferred embodiment of the present invention will be described in detail below, wherein the hydraulic screw down apparatus for a rolling mill 100 can be used for a rolling mill, particularly a four-high rolling mill, to form steel coils having different thicknesses by pressing a continuous cast slab.
Specifically, in the present invention, the hydraulic screw down device 100 for a rolling mill includes a screw down mechanism 10 and an auxiliary mechanism 20, wherein the auxiliary mechanism 20 and the screw down mechanism 10 are connected to each other by a connecting shaft 30 so as to be synchronously movable. The depressing mechanism 10 includes a depressing body 11 and a depressing member 12. The assist mechanism 20 includes a mechanism body 21 and an assist member 22. The depressing body 11 of the depressing mechanism 10 and the mechanism body 21 of the assisting mechanism 20 are symmetrically connected to both sides of the connecting shaft 30.
The pressing member 12 of the pressing mechanism 10 is provided to the pressing body 11. The pressing member 12 includes a first hydraulic cylinder 121 and a first movable body 122. The first movable body 122 is slidably provided to the first hydraulic cylinder 121. The depressing mechanism 10 further includes a first liquid pipe 13, wherein the first liquid pipe 13 is communicated with the first hydraulic cylinder 121. Preferably, in the present invention, the first liquid pipe 13 can be communicated with an energy storage and storage accumulator, a solenoid valve, a throttle valve, a motor, etc. to form a hydraulic system.
It is worth mentioning that when the liquid is pressed into the first hydraulic cylinder 121 of the pressing member 12 from the first liquid pipe 13, the first movable body 122 is driven to be pressed downward. It is understood that the first movable body 122 may be implemented as a piston rod or a depressing screw with a depressing nut. Preferably, in the present invention, the first movable body 122 is implemented as a depressing screw with a depressing nut.
The auxiliary member 22 of the auxiliary mechanism 20 is provided to the mechanism main body 21. The auxiliary member 22 includes a second hydraulic cylinder 221 and a second movable body 222, wherein the second movable body 222 is movably disposed on the second hydraulic cylinder 221. The auxiliary mechanism 20 further comprises a second fluid pipe 23, wherein the second fluid pipe 23 is in communication with the second hydraulic cylinder 221. Preferably, in the present invention, the second fluid pipe 23 can also be connected to an energy storage and storage accumulator, a solenoid valve, a throttle valve, an electric motor, etc. to form a hydraulic system.
It is worth mentioning that, in the utility model discloses, complementary unit 20 the second liquid pipe 23 with screw-down mechanism 10 first liquid pipe 13 is communicate in same energy storage ware, solenoid valve, choke valve, motor etc.. So that the depressing mechanism 10 and the assisting mechanism 20 can be depressed or lifted simultaneously.
Further, in the present invention, the auxiliary mechanism 20 further includes a thermostatic member 24, wherein the thermostatic member 24 is disposed on the mechanism body 21, and the thermostatic member 24 can form a thermostatic chamber 240, wherein the second liquid pipe 23 of the auxiliary mechanism 20 is held in the thermostatic chamber 240, so that when the second liquid pipe 23 is filled with liquid, the liquid in the second liquid pipe 23 can be maintained at a predetermined temperature. In particular, in the present invention, the thermostatic member 24 is implemented as a thermostatic tube. The second liquid pipe 23 is coaxially disposed behind the thermostatic chamber 240 formed by the thermostatic member 24, and a thermostatic passage 241 is formed between the thermostatic member 24 and the second liquid pipe 23. It is worth mentioning that a thermostatic liquid can circulate in the thermostatic channel 241, thereby enabling the liquid in the second liquid pipe 23 to be kept at a constant temperature.
It is worth mentioning that in the present invention, the liquid flowing to the first liquid pipe 13 and the second liquid pipe 23 is implemented as hydraulic oil. The liquid circulating in said thermostatic channel 241 is embodied as water. It will be appreciated by those skilled in the art that the second liquid pipe 23 can be better kept at a stable consistency due to the large specific heat capacity of water.
Further, the hydraulic screw down device 100 for a rolling mill further includes a set of position monitoring components 40 and a controller 50, wherein the screw down mechanism 10, the auxiliary mechanism 20 and the position monitoring components 40 are electrically connected to the controller 50, respectively.
Specifically, in the present invention, the position monitoring part 40 includes a first position monitor 41, a second position monitor 42, and a temperature monitor 43, wherein the first position monitor 41 is provided to the pressing body 11 of the pressing mechanism 10. The second position monitor 42 is provided to the mechanism main body 21. The first position monitor 41 and the second position monitor 42 are used to detect the position of the pressing member 12 in the pressing mechanism 10 and the position of the auxiliary member 22 of the auxiliary mechanism 20, respectively. The controller 50 can further obtain the distance of downward movement of the pressing member 12 and the auxiliary member 22 according to the positions of the first position monitor 41 and the second position monitor 42. The temperature monitor 43 is provided at an inlet of the first liquid pipe 13 to monitor the temperature of the hydraulic oil in the first liquid pipe 13 of the pressing mechanism 10. The first position monitor 41, the second position monitor 42, and the temperature monitor 43 are electrically connected to the controller 50, respectively. It will be understood by those skilled in the art that, in the present invention, the motor of the pressing mechanism 10 and the motor of the auxiliary mechanism 20 are respectively and controllably connected to the controller 50, so that the pressing mechanism 10 and the auxiliary mechanism 20 are respectively and controllably connected to the controller 50.
It is worth mentioning that, in the present invention, the continuous casting slab to be rolled is disposed below the pressing member 12 of the pressing mechanism 10, and the continuous casting slab to be rolled is not disposed below the auxiliary member 22 of the auxiliary mechanism 20.
The utility model discloses in, because be located the ambient temperature that the hydraulic oil in the second liquid pipe 23 was located is unchangeable, consequently, the flow direction the consistency of the hydraulic oil of auxiliary component 22 can not be because the ambient temperature's that screw-down device was located change, and then make auxiliary mechanism 20 can not change because the consistency of hydraulic oil is different when pushing down or lifting. In addition, the controller 50 can obtain the temperature of the hydraulic oil in the first liquid pipe 13 from the temperature monitor 43, and can obtain the distance by which the first movable body 122 is depressed or the upper body from the first position monitor 41. On the other hand, the controller 50 can obtain the distance that the second movable body 222 ascends or descends from the second position monitor 42 when the temperature of the hydraulic oil in the second liquid pipe 23 is constant. Meanwhile, the controller 50 determines a compensation value by comparing a distance error of the second movable body 222 and the first movable body 122 being lifted or pressed. The controller 50 adjusts the pressing distance of the pressing component 12 in the pressing mechanism 10 in real time according to the compensation value, so as to eliminate the error of the hydraulic pressing device 100 for the rolling mill caused by different viscosity of hydraulic oil.
Further, in the present invention, the pressing mechanism 10 includes a first motor 14 and a first coupling 15. The depressing body 11 is connected to the first motor 14 movably up and down by the first coupling 15. The assist mechanism 20 includes a second motor 25 and a second coupling 26, wherein the mechanism body 21 is connected to the second motor 25 movably up and down by the second coupling 26.
Preferably, the position monitoring component 40 further includes a third position monitor 44 and a fourth position monitor 45. The third position monitor 44 is provided to detect the distance the depressing body 11 ascends or descends. The fourth position detector 44 is provided to detect the distance of the upper body or the lowering of the mechanism main body 21.
It can be understood by those skilled in the art that, in the present invention, the first position monitor 41 and the second position monitor 42 can be implemented as a position encoder, respectively. The third position monitor 44 and the fourth position monitor 45 are respectively implemented as a tachometer encoder to monitor the distance the depressing body 11 and the mechanism body 21 are ascended or descended by respectively monitoring the speed at which the first motor 14 and the second motor 25 are rotated. The third position monitor 44 and the fourth position monitor 45 are electrically connected to the controller 50, respectively.
It is worth mentioning that, since the screw-down body 11 is provided to be driven by the first motor 14 to move up and down, the hydraulic screw-down device 100 for a rolling mill can form a larger pressure when pressing a continuous cast slab by the hydraulic screw-down device 100 for a rolling mill, thereby enabling the hydraulic screw-down device 100 for a rolling mill to output a larger pressure.
In the present invention, the first motor 14 and the second motor 25 are synchronously driveably connected to the controller 50.
More preferably, in the present invention, the pressing mechanism 10 includes a first stopper 16. The auxiliary mechanism 20 comprises a second brake 27, wherein the first motor 14 and the second motor 25 are brakable connected to the first brake 16 and the second brake 27, respectively.
The first brake 16 and the second brake 27 are respectively controlled to be connected to the controller 50, and when the pressing position of the pressing member 12 in the pressing mechanism 10 reaches a predetermined position and the thickness of the pressed continuous cast slab reaches the thickness of the required steel coil, the first brake 16 and the second brake 27 are respectively controlled to brake the first motor 14 and the second motor 25.
Referring to fig. 5, in accordance with another aspect of the present invention, the present invention provides a calibration method for a hydraulic screw down of a rolling mill, wherein the calibration method for a hydraulic screw down of a rolling mill comprises the steps of:
5001, (a) detecting a distance moved by an auxiliary member 22 when the hydraulic oil is in a constant temperature state and detecting respective distances moved by a pressing member 12 when the hydraulic oil is in a normal temperature state; and
5002: (B) comparing the respective moving distances of the auxiliary member 22 and the pressing member 12, and calculating a compensation value; and
5003: (C) and compensating the error distance of the pressing component 12 caused by different temperatures of the hydraulic oil according to the compensation value.
Preferably, in the step (C), the step (C) includes a step 50031:
and controlling the pressing component 12 to move according to the distance corresponding to the compensation value.
It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.
Claims (6)
1. Hydraulic screw-down device for rolling mills, characterized in that it comprises;
a depressing mechanism, wherein the depressing mechanism comprises:
a depressing body, wherein the depressing body includes a first hydraulic cylinder, a first movable body, and a first liquid pipe, wherein the first movable body is slidably disposed at the first hydraulic cylinder, wherein the first liquid pipe is communicated with the first hydraulic cylinder, wherein the first movable body is driven to move downward when hydraulic oil is guided from the liquid pipe to the hydraulic cylinder, wherein the first movable body is driven to move in an opposite direction when hydraulic oil is guided out of the hydraulic cylinder from the liquid pipe;
an auxiliary mechanism, wherein the auxiliary mechanism comprises a mechanism body and an auxiliary component, wherein the auxiliary component comprises a second hydraulic cylinder, a second movable body and a second fluid pipe, wherein the second movable body is synchronously and slidably arranged with the first movable body on the second hydraulic cylinder, wherein the second fluid pipe is communicated with the second hydraulic cylinder, wherein the auxiliary mechanism further comprises a thermostatic component, wherein the thermostatic component can form a thermostatic chamber, wherein the second fluid pipe is coaxially arranged behind the thermostatic chamber formed by the thermostatic component, and a thermostatic channel is formed between the thermostatic component and the second fluid pipe, and is used for circulating thermostatic fluid in the thermostatic channel;
a connecting shaft, wherein the pressing mechanism and the auxiliary mechanism are symmetrically arranged on two sides of the connecting shaft;
a position monitoring means, wherein the position monitoring means comprises a first position monitor, a second position monitor, and a temperature monitor, wherein the first position monitor is provided to the depressing body, wherein the second position monitor is provided to the mechanism body, wherein the first position monitor and the second position monitor are used to detect the position of the depressing member and to detect the position, respectively, wherein the temperature monitor is provided at an inlet of the first liquid pipe for monitoring the temperature of hydraulic oil in the first liquid pipe of the depressing mechanism; and
a controller, wherein said depressing mechanism and said assisting mechanism are synchronously controllably connected to said controller, wherein said position monitor, said second position monitor, and said temperature monitor are electrically connected to said controller, respectively.
2. The hydraulic screw down device for a rolling mill according to claim 1, wherein said screw down mechanism includes a first motor and a first coupling, wherein said screw down body is connected to said first motor movably up and down by said first coupling, wherein said auxiliary mechanism includes a second motor and a second coupling, wherein said mechanism body is connected to said second motor movably up and down by said second coupling.
3. The hydraulic screw down device for a rolling mill of claim 1, wherein said position monitoring means comprises a third position monitor and a fourth position monitor, said third position monitor and said fourth position monitor being electrically connected to said controller, respectively.
4. The hydraulic screw down device for a rolling mill of claim 2, wherein said screw down mechanism includes a first brake, wherein said auxiliary mechanism includes a second brake, wherein said first motor and said second motor are brakable connected to said first brake and said second brake, respectively.
5. The hydraulic screw down device for a rolling mill of claim 1, wherein said first and second position monitors are implemented as a position encoder.
6. The hydraulic screw down device for a rolling mill of claim 3, wherein said third position monitor and said fourth position monitor are implemented as a tacho encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920361953.9U CN209866979U (en) | 2019-03-20 | 2019-03-20 | Hydraulic screwdown for rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920361953.9U CN209866979U (en) | 2019-03-20 | 2019-03-20 | Hydraulic screwdown for rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209866979U true CN209866979U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920361953.9U Active CN209866979U (en) | 2019-03-20 | 2019-03-20 | Hydraulic screwdown for rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209866979U (en) |
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2019
- 2019-03-20 CN CN201920361953.9U patent/CN209866979U/en active Active
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