CN106345979B - A kind of device and method that casting blank solidification end position is judged based on deflector roll load detecting - Google Patents
A kind of device and method that casting blank solidification end position is judged based on deflector roll load detecting Download PDFInfo
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- CN106345979B CN106345979B CN201610778769.5A CN201610778769A CN106345979B CN 106345979 B CN106345979 B CN 106345979B CN 201610778769 A CN201610778769 A CN 201610778769A CN 106345979 B CN106345979 B CN 106345979B
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- deflector roll
- rack
- end position
- solidification end
- casting blank
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- 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
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
Abstract
The invention discloses a kind of device and method that casting blank solidification end position is judged based on deflector roll load detecting, multiple check bits are set between the rack of support deflector roll, load cell and displacement component are set respectively on each check bit, the load cell and displacement component is connected with processing unit respectively, pressure that more each check bit of processing unit is sent, change in displacement situation, judge position existing for casting blank solidification end；Detecting element of the present invention sets simple, data processing simplicity, it is easy to can be combined pressure, change in displacement rule with casting blank solidification, and can be handled online, closing to reality, the defects of overcoming in the prior art, it can be depressed for conticaster and support is provided, solve Inner Quality of Billet.
Description
Technical field
The invention belongs to metallurgical process control technology field, is related to one kind and judges casting blank solidification end based on deflector roll load detecting
The device and method of end position.
Background technology
In continuous casting production process, high-temperature liquid state molten steel is formed with certain thick by crystallizer and two cold-zone continuous coo1ings
Spend the strand of wick-containing, final solidification completely.Due to strand, molten steel is there occurs solidification shrinkage in process of setting, if solidification shrinkage
It cannot completely supplement, the internal flaws such as segregation, loose, shrinkage cavity and crackle can be formed in strand centre.In casting process
In, the strand with wick-containing is depressed to compensate solidification shrinkage, and herein by several groups of racks before casting blank solidification end
During, most crucial technology is how accurately to determine the solidification end position of strand.
Traditional method is to the solidification behavior founding mathematical models in casting process, according to steel grade performance parameter, pulling rate
The temperature field of strand is calculated with cooling parameter etc., so as to predict solidification end position.The shortcomings that technology is due to solidification wick-containing
Terminal position be that the method for building up of its accuracy and model, steel grade parameter and boundary condition are closely related obtained by theoretical calculation,
And lack and directly detect foundation, it is difficult verification in production.In continuous casting actual production process, due to answering influence factor more
Miscellaneous, the solidification end position of calculating and actual deviation are very big, cause pressure effect fluctuation very big, do not reach production requirement.
The content of the invention
Present invention solves the problem in that provide a kind of dress that casting blank solidification end position is judged based on deflector roll load detecting
Put and method, support, solution Inner Quality of Billet are provided for conticaster pressure.
The present invention is to be achieved through the following technical solutions：
A kind of device that casting blank solidification end position is judged based on deflector roll load detecting, is supported and is set in multiple racks of deflector roll
Multiple check bits are put, load cell and displacement component, the load cell and displacement element are set respectively on each check bit
Part is connected with processing unit respectively, and pressure that more each check bit of processing unit is sent, change in displacement situation, judge to cast
The position of base solidification end.
The check bit is arranged at four corners of rack.
The processing unit controls the deflector roll position of each rack always according to Displacement Feedback value, makes lower guide roll distance values
For strand natural cooling shrinkage value.
The depressing force value of feedback that the processing unit is sent according to load cell, obtains the regularity of distribution of deflector roll load,
Judge casting blank solidification end position：When casting speed is stablized it is constant when, it is tentatively true when the load of adjacent rack deflector roll be mutated
The position for making existing mutation is solidification end position.
The Displacement Feedback value that the processing unit is sent according to displacement component, the strand for contrasting different conditions pass through rack
When deflector roll load change, according to when deflector roll load slope further confirm that casting blank solidification end position.
A kind of method that casting blank solidification end position is judged based on deflector roll load detecting, is set between the rack of support deflector roll
Multiple check bits are put, load cell and displacement component, the load cell and displacement element are set respectively on each check bit
Part is connected with processing unit respectively；
The depressing force value of feedback that processing unit is sent according to load cell, obtains the regularity of distribution of deflector roll load, judges to cast
Base solidification end position：When casting speed is stablized it is constant when, when adjacent rack deflector roll load be mutated when, primarily determine that appearance
The position of mutation is solidification end position；
The Displacement Feedback value that the processing unit is sent according to displacement component, the strand for contrasting different conditions pass through rack
When deflector roll load change, according to when deflector roll load slope further confirm that casting blank solidification end position.
The processing unit is according to the judgement that load cell is fed back：
When casting speed is stablized it is constant when, when the deflector roll load of first rack is more than the deflector roll load of second rack very
When big, first rack is in casting blank solidification end position；When casting speed changes for speedup, when the deflector roll of some rack is born
When load is changed into very big from very little, then this rack present position is casting blank solidification end position；When casting speed changes to slow down,
When the deflector roll of some rack is loaded from being changed into very little greatly very much, then this rack present position is casting blank solidification end position.
Specifically it is judged as：When casting speed is stablized it is constant when, when the deflector roll load of first rack is second rack
Deflector roll load 2 times when, first rack is in casting blank solidification end position；When casting speed changes for speedup, when some
When the deflector roll load of rack is increased to original 2 times, then this rack present position is casting blank solidification end position；Work as casting speed
When changing to slow down, when the deflector roll load of some rack is reduced to original 0.5 times, then this rack present position is coagulated for strand
Gu terminal position.
The processing unit is according to the judgement that load cell is fed back：
Processing unit controls the deflector roll position of each rack by Displacement Feedback value, make lower guide roll distance values for strand from
Right cooling meat value；Progressively reduce deflector roll distance values, when deflector roll load is approximate slowly varying with quadratic linear, slope is by small change
Greatly, judge to be casting blank solidification end position herein；Progressively reduce deflector roll distance values, deflector roll load approximation is quickly become with once linear
Change, slope is definite value, judges that strand solidifies completely.
Compared with prior art, the present invention has technique effect beneficial below：
The device and method provided by the invention that casting blank solidification end position is judged based on deflector roll load detecting, is led in support
The rack of roller sets load cell and displacement component, by analyze pressure, change in displacement casting blank solidification changing rule, according to
Pressure, the corresponding suddenly change of displacement are so as to tentatively be judged and determine whether to judge that strand coagulates when casting blank solidification changes
Gu the position of end：During by recording the strand at rack from being changed into solidifying completely with wick-containing state, the change of deflector roll load
Rule primarily determines that casting blank solidification end position；By continuously reducing roller distance values, analysis deflector roll load variation and
Reduction amount confirms casting blank solidification end position with loading the relation of change.
The device and method provided by the invention that casting blank solidification end position is judged based on deflector roll load detecting, detecting element
Simple, data processing simplicity being set, it is easy to pressure, change in displacement rule can be combined with casting blank solidification, and can
Handled online, closing to reality, the defects of overcoming in the prior art, can be depressed for conticaster and support is provided, solve casting
Base internal soundness.
Brief description of the drawings
Fig. 1 is the scheme of installation of load cell and displacement component in rack；
Fig. 2 is the schematic top plan view of load cell and displacement component in rack；
Fig. 3 is the change schematic diagram of casting blank solidification end when casting speed changes；
Fig. 4 is that deflector roll loads variation diagram when casting speed is different；
Fig. 5 is strand without deflector roll load when solidifying completely and the ratio change schematic diagram of deflector roll distance values；
Fig. 6 is that deflector roll load and the ratio change of deflector roll distance values are illustrated when strand solidifies completely.
Wherein, 1 is deflector roll, and 2 be strand, and 3 be load cell, and 4 be displacement component, and 5 be stent.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Referring to Fig. 1, Fig. 2, a kind of device that casting blank solidification end position is judged based on deflector roll load detecting, in support deflector roll
Multiple check bits are set in 1 multiple racks, load cell 3 and displacement component 4 are set respectively on each check bit, it is described
Load cell 3 and displacement component 4 are connected with processing unit respectively, pressure that more each check bit of processing unit is sent, position
Situation of change is moved, judges position existing for casting blank solidification end.
Specifically, the check bit is arranged at four different directions of rack, each direction sets a check bit；
Load cell and displacement component are installed in four positions of rack respectively, so as to obtain Displacement Feedback value and depressing force value of feedback；It is logical
The deflector roll position that Displacement Feedback value controls each rack is crossed, it is strand natural cooling shrinkage value to make lower guide roll distance values.
The depressing force value of feedback that the processing unit is sent according to load cell, obtains the regularity of distribution of deflector roll load,
Judge casting blank solidification end position：When casting speed is stablized it is constant when, it is tentatively true when the load of adjacent rack deflector roll be mutated
The position for making existing mutation is solidification end position.
The Displacement Feedback value that the processing unit is sent according to displacement component, the strand for contrasting different conditions pass through rack
When deflector roll load change, according to when deflector roll load slope further confirm that casting blank solidification end position.
A kind of method that casting blank solidification end position is judged based on deflector roll load detecting, including following operation：
Load cell and displacement component are installed respectively in four positions of rack, so as to obtain Displacement Feedback value and depressing force
Value of feedback；
The deflector roll position of each rack is controlled by Displacement Feedback value, lower guide roll distance values is received for strand natural cooling
Contracting value；
Rack load cell depressing force value of feedback is recorded, the regularity of distribution of deflector roll load is obtained, tentatively judges casting blank solidification
Terminal position：When casting speed is stablized it is constant when, analyze adjacent rack deflector roll loading condition, when adjacent rack deflector roll load occur
During mutation, solidification end position is primarily determined that.Specifically determination methods are：When the deflector roll load of first rack is more than second machine
When the deflector roll load of frame is very big (for example loading 2 times for the deflector roll of second rack), first rack is in casting blank solidification end
Position；When casting speed for speedup change when, when some rack deflector roll load from it is small be changed into very big when (be increased to original 2
Times when), then this rack present position is casting blank solidification end position.When casting speed changes to slow down, when some rack
Deflector roll load by very it is big change very little into when (when being reduced to original 0.5 times), then this rack present position is casting blank solidification end
Position.
Change the deflector roll position of each rack by displacement component value of feedback, when contrasting the strands of different conditions and passing through rack
The changing rule of deflector roll load, the regularity of distribution difference of analysis deflector roll load, further confirms that casting blank solidification end position.Specifically
Method is：Progressively reduce deflector roll distance values, when deflector roll load is approximate slowly varying with quadratic linear, slope changes from small to big, and can sentence
Fixed is casting blank solidification end position herein；Progressively reduce deflector roll distance values, deflector roll load approximation is quickly changed with once linear, tiltedly
Rate is almost definite value, can determine that strand solidifies completely.
With reference to Fig. 3, when casting speed changes, solidification end position also follows change；When casting speed change is small, solidification end
End position shortens, and when casting speed becomes larger, solidification end position is elongated.
Reference Fig. 4, when shelf position is by before solidifying to after solidifying, deflector roll load occurs being obviously reduced and then keeps substantially
Very little fluctuates, thus when deflector roll load by substantially diminish greatly and then it is basic keep very little fluctuation can preliminary judgement be strand herein
Solidifying terminal position.
With reference to Fig. 5, when deflector roll distance values taper into, since this region strand does not solidify completely, deflector roll load is near
Seemingly slowly varying with quadratic linear, slope changes from small to big, and can confirm as strand on the basis of attached drawing 4 and coagulate terminal position.
With reference to Fig. 6, when deflector roll distance values taper into, since this region strand solidifies completely, coefficient of elasticity it is very big and
It is nearly a steady state value, deflector roll load approximation is quickly changed with once linear, and slope is almost definite value.
Example given above is to realize the present invention preferably example, and the invention is not restricted to above-described embodiment.This area
Technical staff's technical solution according to the present invention technical characteristic any nonessential addition, the replacement made, belong to this
The protection domain of invention.
Claims (6)
1. a kind of device that casting blank solidification end position is judged based on deflector roll load detecting, it is characterised in that in support deflector roll
Check bit is set in multiple racks, load cell and displacement component, the load cell are set respectively on each check bit
It is connected respectively with processing unit with displacement component, pressure that more each check bit of processing unit is sent, change in displacement situation,
Judge position existing for casting blank solidification end；
The depressing force value of feedback that the processing unit is sent according to load cell, obtains the regularity of distribution of deflector roll load, judges
Casting blank solidification end position：When casting speed is stablized it is constant when, when adjacent rack deflector roll load be mutated when, primarily determine that out
The position being now mutated is solidification end position；
The Displacement Feedback value that the processing unit is sent according to displacement component, contrasts when the strands of different conditions passes through rack and leads
The change of roller load, loads slope according to deflector roll and further confirms that casting blank solidification end position.
2. the device of casting blank solidification end position is judged based on deflector roll load detecting as claimed in claim 1, it is characterised in that
The check bit is arranged at four different directions of rack, and each direction sets a check bit.
3. the device of casting blank solidification end position is judged based on deflector roll load detecting as claimed in claim 1, it is characterised in that
The processing unit controls the deflector roll position of each rack always according to Displacement Feedback value, make lower guide roll distance values for strand from
Right cooling meat value.
A kind of 4. method that casting blank solidification end position is judged based on deflector roll load detecting, it is characterised in that in support deflector roll
Multiple check bits are set in multiple racks, load cell and displacement component, the pressure measurement are set respectively on each check bit
Element and displacement component are connected with processing unit respectively；
The depressing force value of feedback that processing unit is sent according to load cell, obtains the regularity of distribution of deflector roll load, judges that strand coagulates
Gu terminal position：When casting speed is stablized it is constant when, when adjacent rack deflector roll load be mutated when, primarily determine that and be mutated
Position be solidification end position；
The Displacement Feedback value that the processing unit is sent according to displacement component, contrasts when the strands of different conditions passes through rack and leads
The change of roller load, loads slope according to deflector roll and further confirms that casting blank solidification end position.
5. the method for casting blank solidification end position is judged based on deflector roll load detecting as claimed in claim 4, it is characterised in that
It is described when casting speed stablizes constant, when the deflector roll load of first rack loads 2 times for the deflector roll of second rack, the
One rack is in casting blank solidification end position；When casting speed changes for speedup, when the deflector roll of some rack loads increase
For original 2 times when, then this rack present position is casting blank solidification end position；When casting speed changes to slow down, when certain
When the deflector roll load of a rack is reduced to original 0.5 times, then this rack present position is casting blank solidification end position.
6. the method for casting blank solidification end position is judged based on deflector roll load detecting as claimed in claim 4, it is characterised in that
The processing unit is according to the judgement that load cell is fed back：
Processing unit controls the deflector roll position of each rack by Displacement Feedback value, makes lower guide roll distance values naturally cold for strand
But shrinkage value；Progressively reduce deflector roll distance values, deflector roll load is approximate slowly varying with quadratic linear, and slope changes from small to big, and judges
It is casting blank solidification end position herein；Progressively reduce deflector roll distance values, deflector roll load approximation is quickly changed with once linear, slope
For definite value, judge that strand solidifies completely.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610778769.5A CN106345979B (en) | 2016-08-30 | 2016-08-30 | A kind of device and method that casting blank solidification end position is judged based on deflector roll load detecting |
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|---|---|---|---|
| CN201610778769.5A CN106345979B (en) | 2016-08-30 | 2016-08-30 | A kind of device and method that casting blank solidification end position is judged based on deflector roll load detecting |
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| CN106345979B true CN106345979B (en) | 2018-05-11 |
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| CN108380837B (en) * | 2018-01-31 | 2019-11-08 | 中冶连铸技术工程有限责任公司 | A kind of method of determining slab specific location solidification geomery |
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| CN103048242A (en) * | 2013-01-21 | 2013-04-17 | 中冶赛迪电气技术有限公司 | Method and device for detecting solid fraction and final stage of solidification of continuously cast slab |
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| CN104889357A (en) * | 2014-03-05 | 2015-09-09 | 鞍钢股份有限公司 | Method for reducing center segregation and total oxygen content of high-strength steel |
| CN105689673A (en) * | 2014-11-28 | 2016-06-22 | 衡阳镭目科技有限责任公司 | Electromagnetic ultrasonic system for detecting solidification end position of continuous casting billet |
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2016
- 2016-08-30 CN CN201610778769.5A patent/CN106345979B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001113349A (en) * | 1999-10-15 | 2001-04-24 | Sumitomo Metal Ind Ltd | Rolling reduction device in continuous casting equipment |
| CN101920323A (en) * | 2010-08-02 | 2010-12-22 | 河北钢铁股份有限公司邯郸分公司 | Dynamic soft reduction method for detecting tail end of solidified liquid core of casting blank based on pressure feedback |
| CN103048242A (en) * | 2013-01-21 | 2013-04-17 | 中冶赛迪电气技术有限公司 | Method and device for detecting solid fraction and final stage of solidification of continuously cast slab |
| CN104889357A (en) * | 2014-03-05 | 2015-09-09 | 鞍钢股份有限公司 | Method for reducing center segregation and total oxygen content of high-strength steel |
| CN203944811U (en) * | 2014-06-17 | 2014-11-19 | 中冶连铸技术工程有限责任公司 | Bloom continuous casting base solidification end position detecting device |
| CN104493121A (en) * | 2014-11-28 | 2015-04-08 | 东北大学 | Online detection method for solidified bottom end position in bloom continuous casting production process |
| CN105689673A (en) * | 2014-11-28 | 2016-06-22 | 衡阳镭目科技有限责任公司 | Electromagnetic ultrasonic system for detecting solidification end position of continuous casting billet |
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