CN108480583B - Casting blank centering device of stepping overturning cooling bed - Google Patents
Casting blank centering device of stepping overturning cooling bed Download PDFInfo
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- CN108480583B CN108480583B CN201810496321.3A CN201810496321A CN108480583B CN 108480583 B CN108480583 B CN 108480583B CN 201810496321 A CN201810496321 A CN 201810496321A CN 108480583 B CN108480583 B CN 108480583B
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000009749 continuous casting Methods 0.000 claims abstract description 51
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 19
- 230000007306 turnover Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 208000037063 Thinness Diseases 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 206010048828 underweight Diseases 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1284—Horizontal removing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a casting blank centering device of a stepping overturning cooling bed, which comprises a movable baffle, a baffle position adjusting mechanism and an industrial personal computer, wherein the baffle position adjusting mechanism comprises a servo cylinder and a displacement sensor, a cylinder body of the servo cylinder is fixed at the tail end of a blank unloading roller way, a piston rod of the servo cylinder is parallel to the conveying direction of the blank unloading roller way and opposite to a continuous casting blank on the blank unloading roller way, a control valve group of the servo cylinder is controlled by the industrial personal computer, the movable baffle is fixed on the piston rod of the servo cylinder, the displacement sensor is arranged on the piston rod of the servo cylinder, and a signal output end of the displacement sensor is connected with the input end of the industrial personal computer. The device calculates the ideal position of the movable baffle according to the size of the continuous casting blank to be produced, and then adjusts the position of the movable baffle by using the servo cylinder to realize the accurate centering of the continuous casting blank. The device has the advantages of large control range, high adjustment precision and high speed, well solves the problem of unbalanced load of the cooling bed, and is suitable for production occasions where the specifications of products are frequently changed.
Description
Technical Field
The invention relates to a device capable of automatically aligning the centers of continuous casting billets with different specifications with the longitudinal center line of a stepping overturning cooling bed, and belongs to the technical field of metallurgical machinery.
Background
The blank ejection system of the continuous casting machine is an important device for a steelmaking-continuous casting process and mainly comprises a blank unloading roller way, a transverse steel moving vehicle and a stepping overturning cooling bed. The continuous casting billet from the continuous casting machine conveying roller way firstly enters the blank unloading roller way, and after being aligned by a fixed baffle at the tail end of the blank unloading roller way, the continuous casting billet is pushed onto the stepping overturning cooling bed by the transverse steel moving vehicle. The size of the transverse frame of the continuous casting machine step turnover cooling bed is designed according to the size of the longest continuous casting billet produced by the continuous casting machine, when the continuous casting machine produces the longest continuous casting billet, the longest continuous casting billet is aligned by a fixed baffle plate and pushed onto the step turnover cooling bed by a transverse steel moving vehicle, the weights of the continuous casting billets at two sides of the longitudinal center line of the step turnover cooling bed are just equal, but when the continuous casting machine produces continuous casting billets with other specifications, the weights of the continuous casting billets at two sides of the longitudinal center line of the step turnover cooling bed are unequal, the step turnover cooling bed can lose balance in the operation process, the load imbalance of the step turnover cooling bed can deform the integral frame of the cooling bed, the tail screws connected with longitudinal beams and transverse beams are cut off, the lifting hydraulic cylinder and the piston of the transverse hydraulic cylinder of the driving cooling bed are seriously worn in a certain direction, so that the hydraulic cylinder leaks, and the casting billets on the step turnover cooling bed are inclined, or the step turnover cooling bed cannot normally run, and the method adopted by each steel mill is as to solve the situation:
1. adding a counterweight on the stepping overturning cooling bed
When the continuous casting machine produces the continuous casting blank with smaller specification, the continuous casting blank is aligned by the fixed baffle plate, and then pushed to the stepping overturning cooling bed by the transverse steel moving vehicle, one side of the longitudinal central line of the stepping overturning cooling bed is inevitably unbalanced, and at the moment, the balance weight is added on one side of the underweight according to measurement, so that the two sides of the longitudinal central line of the cooling bed can be balanced. The method has the defects that the counter weight is required to be frequently placed and taken off on the stepping overturning cooling bed, so that the workload of workers is increased, and certain errors are caused in the measurement and placement of the counter weight.
2. Installing lifting baffle before fixed baffle at tail end of blank unloading roller way
The lifting baffle is generally arranged between two rollers of the blank unloading roller way, the center of a continuous casting blank with one specification can be aligned with the longitudinal center line of the stepping overturning cooling bed, and when the specifications of continuous casting blanks to be produced are more, the stepping overturning cooling bed still has a phenomenon of unbalanced weight, so the method has a certain limitation.
3. Reversing operation centering of continuous casting blank on blank unloading roller way by using staff
When the continuous casting machine produces continuous casting billets with smaller specifications, after the continuous casting billets are aligned by the fixed baffle plates, workers reverse the continuous casting billets on the unloading roller table, after visual alignment, the continuous casting billets are pushed up by the transverse steel moving vehicle to step and turn over the cooling bed. The method is simpler, but because the staff in the operation room has a certain distance from the site, the visual inspection has a certain error, the phenomenon of unbalanced stepping overturning cooling bed still exists to a certain extent, and the workload of the staff is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a casting blank centering device of a step-by-step overturning cooling bed so as to thoroughly solve the problem of unbalanced load of the step-by-step overturning cooling bed.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a casting blank centering device of step-by-step upset cooling bed, includes movable baffle, baffle position adjustment mechanism and industrial computer in the constitution, baffle position adjustment mechanism includes servo cylinder and displacement sensor, servo cylinder's cylinder body passes through servo cylinder base to be fixed at the off-blank roll table end, and the piston rod of servo cylinder is on a parallel with the direction of delivery of off-blank roll table and with the continuous casting blank on the off-blank roll table relatively, and the control valves of servo cylinder is controlled by the industrial computer, movable baffle is fixed on servo cylinder's piston rod, displacement sensor installs on servo cylinder's piston rod, displacement sensor's signal output part termination industrial computer's input.
According to the casting blank centering device of the stepping overturning cooling bed, the control valve group of the servo cylinder comprises the servo valve, the two-position four-way reversing valve and the three hydraulic control one-way valves, the P port of the servo valve is connected with pressure oil through the first hydraulic control one-way valve, the T port of the servo valve is connected with the oil tank, the A port and the B port of the servo valve are respectively connected with the rod cavity and the rodless cavity of the servo cylinder through the second hydraulic control one-way valve and the third hydraulic control one-way valve, the P port of the two-position four-way reversing valve is connected with the pressure oil, the T port of the two-position four-way reversing valve is connected with the oil return pipe, the A port of the two-position four-way reversing valve is connected with the L port of the three hydraulic control one-way valves, the B port of the three hydraulic control one-way valves is connected with the industrial personal computer.
The baffle plate position adjusting mechanisms are arranged in a plurality, share one movable baffle plate and respectively correspond to each continuous casting blank of a blank ejection system of the continuous casting machine.
According to the casting blank centering device of the stepping overturning cooling bed, the control valve group of the servo cylinder further comprises the overflow valve and the one-way valve, the oil inlet of the overflow valve is connected with the rodless cavity of the servo cylinder, the oil outlet is connected with the oil tank through the oil pipe after being connected with the oil inlet of the one-way valve, and the oil outlet of the one-way valve is connected with the rod cavity of the servo cylinder.
The industrial personal computer of the device calculates the ideal position of the movable baffle according to the size of the continuous casting blank to be produced, and then adjusts the position of the movable baffle by using the servo cylinder to realize the accurate centering of the continuous casting blank. The device has the advantages of large control range, high adjustment precision and high speed, well solves the problem of unbalanced load of the cooling bed, and is suitable for production occasions where the specifications of products are frequently changed.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a field layout of a moving blind and servo cylinder of the present invention;
FIG. 2 is a right side view of FIG. 1;
fig. 3 is a hydraulic schematic of each flow.
The reference numerals in the figures are: 1. the hydraulic control device comprises a movable baffle, a servo cylinder base, a displacement sensor, a hydraulic control one-way valve and a hydraulic control one-way valve.
Detailed Description
The invention provides a device capable of automatically aligning the centers of continuous casting billets with different specifications with the longitudinal center line of a stepping overturning cooling bed, which can effectively solve the problem of unbalanced load of the cooling bed, improve the control precision of the stepping overturning cooling bed and eliminate the synchronization error.
Referring to fig. 1, 2 and 3, the invention mainly comprises an industrial personal computer, a movable baffle 1 and a baffle position adjusting mechanism, wherein the baffle position adjusting mechanism comprises a servo cylinder 2, a servo cylinder base 3, a displacement sensor 4, an overflow valve 5, a one-way valve 6, a two-position four-way reversing valve 8, a servo valve 10, a first hydraulic control one-way valve 9, a second hydraulic control one-way valve 11 and a third hydraulic control one-way valve 7.
The invention will be further described with reference to a six-machine six-strand continuous casting machine.
As shown in the figure, the end of a blank unloading roller way of each flow of the six-machine six-flow continuous casting machine is provided with a servo cylinder 2, each servo cylinder 2 is arranged on a servo cylinder base 3, piston rods of the six servo cylinders 2 are connected with a common movable baffle plate 1 through servo cylinder joints, each flow hydraulic system is identical, and each flow hydraulic system consists of the servo cylinder 2, an overflow valve 5, a check valve 6, a third hydraulic control check valve 7, a two-position four-way reversing valve 8, a first hydraulic control check valve 9, a servo valve 10, a second hydraulic control check valve 11 and a displacement sensor 4, and the overflow valve 5 is arranged on an oil path connected with a rodless cavity of the servo cylinder 2.
The industrial personal computer moves the movable baffle 1 to a designated position through the baffle position adjusting mechanism, and when a continuous casting billet from the continuous casting machine conveying roller way enters the billet unloading roller way, the movable baffle 1 at the tail end of the billet unloading roller way is aligned, and the continuous casting billet is pushed onto the cooling bed through the transverse steel moving handle bar. The movable baffle can be applied to a blank ejection system of a multi-stream continuous casting machine, each stream is provided with a servo cylinder, the servo cylinders of each stream are connected with the movable baffle 1 through servo cylinder joints, a piston rod of each servo cylinder is provided with a displacement sensor, displacement signals of the displacement sensors on the servo cylinders of each stream are fed back to an industrial personal computer, and output servo valve control signals respectively carry out closed-loop control on the servo cylinders of each stream. The stroke of the servo cylinder is designed according to the stroke of the servo cylinder required when the shortest fixed-length continuous casting billet is produced. The motion of six servo cylinders of six flows is mutually coupled, and the output quantity of each servo cylinder can be fed back to the control input end of each servo cylinder by adopting equal-state cross-coupling control, so that the system has better tracking performance and synchronous control performance.
When the first-stream strand hits the moving dam 1, the high pressure instantaneously generated by the rodless chamber of the servo cylinder 2 of the first stream exceeds the set pressure of the relief valve 5 of the first stream, and the high pressure oil will leak from the relief valve 5 to the return line. The third hydraulic control one-way valve 7 and the second hydraulic control one-way valve 11 are used for self-locking the servo cylinder 2 in the production process. The servo valve 10 is used for receiving instructions of the industrial personal computer to control the extension and retraction of a piston rod of the servo cylinder 2, the first hydraulic control one-way valve 9 is used for controlling the on-off of a high-pressure oil path leading to the servo valve 10, and the two-position four-way reversing valve 8 is used for mode selection. When the electromagnet 1DT of the two-position four-way reversing valve 8 is not electrified, the first hydraulic control one-way valve 9 cuts off a high-pressure oil path leading to the servo valve 10, meanwhile, the second hydraulic control one-way valve 11 and the third hydraulic control one-way valve 7 are self-locked, hydraulic oil with a rod cavity and a rodless cavity of the servo cylinder 2 is locked, the first flow baffle hydraulic system is in a locking mode, when the electromagnet 1DT of the two-position four-way reversing valve 8 is electrified, the first hydraulic control one-way valve 9 is communicated with the high-pressure oil path of the servo valve 10, meanwhile, the second hydraulic control one-way valve 11 and the third hydraulic control one-way valve 7 are opened through control oil paths, and the first flow baffle hydraulic system is in an unlocking mode and is ready for the servo valve 10 to drive the servo cylinder 2.
The hydraulic systems of the second, third, fourth, fifth and sixth flows are identical in composition and function to the first flow.
The workflow of the present invention is described below with a six-machine six-strand continuous caster;
1. preparation stage before baffle position adjustment (unlocking of hydraulic system)
The electromagnets 1DT of the two-position four-way reversing valve 8 of six flows are simultaneously electrified, the first hydraulic control one-way valve 9, the second hydraulic control one-way valve 11 and the third hydraulic control one-way valve 7 in the six flows are opened, and the hydraulic system of each flow is in an unlocking mode.
2. Baffle position adjusting stage (servo valve 10 controls servo cylinder 2 and movable baffle 1 to work)
The industrial personal computer calculates the position of the movable baffle plate 1 according to the casting blank fixed length to be produced, transmits command signals to the servo valves 10 of each flow, and simultaneously controls each servo cylinder 2 to drive the movable baffle plate 1 to reach the designated position.
3. Moving baffle blank receiving working stage (hydraulic system locking, baffle blank receiving)
After the movable baffle 1 reaches the designated position, the six-flow two-position four-way reversing valve 8 is simultaneously powered off, and the first hydraulic control one-way valve 9, the second hydraulic control one-way valve 11 and the third hydraulic control one-way valve 7 are locked. Taking the first flow as an example, the condition that the continuous casting blank collides with the movable baffle is described as follows: when the casting blank of the first flow collides with the movable baffle 1, hydraulic oil in the rod cavity and the rodless cavity of the servo cylinder 2 sealed in the first flow plays a role in buffering, when the casting blank of the first flow collides with the movable baffle 1, the instantaneous high pressure generated in the rodless cavity of the servo cylinder 2 is larger than the preset pressure of the overflow valve 5, the high pressure oil in the rodless cavity of the servo cylinder 2 can leak from the overflow valve 5 into an oil return pipeline, and meanwhile, the hydraulic oil in the oil return pipeline can open the one-way valve 6 to enter the rod cavity of the servo cylinder 2. The other five-flow billet receiving conditions are the same as the first flow, and after the six continuous casting billets of the continuous casting are aligned, the six continuous casting billets are pushed onto the stepping overturning cooling bed by the transverse steel moving vehicle.
The invention can accurately control the length center of the continuous casting blank on line according to the production process by the industrial personal computer so as to align the length center with the longitudinal center line of the cooling bed, can accurately center the casting blank with the actual length between the longest fixed length and the shortest fixed length which can be produced by the continuous casting machine, and is suitable for occasions with frequently changed fixed length specifications and multiple fixed length specifications.
Claims (2)
1. The casting blank centering device of the stepping overturning cooling bed is characterized by comprising a movable baffle (1), a baffle position adjusting mechanism and an industrial personal computer, wherein the baffle position adjusting mechanism comprises a servo cylinder (2) and a displacement sensor (4), a cylinder body of the servo cylinder (2) is fixed at the tail end of a blank unloading roller way through a servo cylinder base (3), a piston rod of the servo cylinder (2) is parallel to the conveying direction of the blank unloading roller way and opposite to a continuous casting blank on the blank unloading roller way, a control valve group of the servo cylinder (2) is controlled by the industrial personal computer, the movable baffle (1) is fixed on the piston rod of the servo cylinder (2), and the displacement sensor (4) is installed on the piston rod of the servo cylinder (2), and a signal output end of the displacement sensor (4) is connected with the input end of the industrial personal computer;
the control valve group of the servo cylinder (2) comprises a servo valve (10), a two-position four-way reversing valve (8) and three hydraulic control one-way valves, wherein a P port of the servo valve (10) is connected with pressure oil through a first hydraulic control one-way valve (9), a T port of the servo valve is connected with an oil tank, an A port and a B port of the servo valve are respectively connected with a rod cavity and a rodless cavity of the servo cylinder (2) through a second hydraulic control one-way valve (11) and a third hydraulic control one-way valve (7), the P port of the two-position four-way reversing valve (8) is connected with pressure oil, the T port of the servo valve is connected with an oil return pipe, the A port of the servo valve is connected with an L port of the three hydraulic control one-way valves, the B port of the servo valve (10) and the control end of the two-position four-way reversing valve (8) are connected with an industrial personal computer;
the baffle position adjusting mechanisms are provided in plurality, share one movable baffle (1) and respectively correspond to each casting blank of the blank ejection system of the continuous casting machine.
2. The casting blank centering device of the stepping overturning cooling bed according to claim 1, wherein the control valve group of the servo cylinder (2) further comprises an overflow valve (5) and a one-way valve (6), an oil inlet of the overflow valve (5) is connected with a rodless cavity of the servo cylinder (2), an oil outlet is connected with an oil tank through an oil pipe after being connected with an oil inlet of the one-way valve (6), and an oil outlet of the one-way valve is connected with a rod cavity of the servo cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496321.3A CN108480583B (en) | 2018-05-22 | 2018-05-22 | Casting blank centering device of stepping overturning cooling bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496321.3A CN108480583B (en) | 2018-05-22 | 2018-05-22 | Casting blank centering device of stepping overturning cooling bed |
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| Publication Number | Publication Date |
|---|---|
| CN108480583A CN108480583A (en) | 2018-09-04 |
| CN108480583B true CN108480583B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810496321.3A Active CN108480583B (en) | 2018-05-22 | 2018-05-22 | Casting blank centering device of stepping overturning cooling bed |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894917B (en) * | 2019-05-06 | 2024-04-26 | 中冶京诚工程技术有限公司 | Hydraulic control devices and systems |
| CN112317548A (en) * | 2020-09-29 | 2021-02-05 | 南京钢铁股份有限公司 | Method for realizing cold bed blanking steel plate centering by using cold metal detector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613390A (en) * | 1993-11-24 | 1997-03-25 | Kawasaki Steel Corporation | Corner reduction device equipped with corner rolls, control device thereof, and method of rolling by using these devices |
| CN102303102A (en) * | 2011-09-30 | 2012-01-04 | 中冶南方工程技术有限公司 | Continuous casting process and continuous casting machine for extra-thick plate blank |
| CN102581241A (en) * | 2012-02-27 | 2012-07-18 | 柳州钢铁股份有限公司 | Secondary automatic cutting system of continuous casting slab |
| CN202447622U (en) * | 2011-12-20 | 2012-09-26 | 鞍钢股份有限公司 | Continuous casting billet rollgang centering device |
| CN104439141A (en) * | 2014-12-15 | 2015-03-25 | 中冶南方工程技术有限公司 | Adaptive slab centering unit and centering method thereof |
| CN208195603U (en) * | 2018-05-22 | 2018-12-07 | 宣化钢铁集团有限责任公司 | A kind of slab centralising device of walking cooling bank |
-
2018
- 2018-05-22 CN CN201810496321.3A patent/CN108480583B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613390A (en) * | 1993-11-24 | 1997-03-25 | Kawasaki Steel Corporation | Corner reduction device equipped with corner rolls, control device thereof, and method of rolling by using these devices |
| CN102303102A (en) * | 2011-09-30 | 2012-01-04 | 中冶南方工程技术有限公司 | Continuous casting process and continuous casting machine for extra-thick plate blank |
| CN202447622U (en) * | 2011-12-20 | 2012-09-26 | 鞍钢股份有限公司 | Continuous casting billet rollgang centering device |
| CN102581241A (en) * | 2012-02-27 | 2012-07-18 | 柳州钢铁股份有限公司 | Secondary automatic cutting system of continuous casting slab |
| CN104439141A (en) * | 2014-12-15 | 2015-03-25 | 中冶南方工程技术有限公司 | Adaptive slab centering unit and centering method thereof |
| CN208195603U (en) * | 2018-05-22 | 2018-12-07 | 宣化钢铁集团有限责任公司 | A kind of slab centralising device of walking cooling bank |
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| CN108480583A (en) | 2018-09-04 |
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