CN109822082A - A kind of mold automatic casting flow control methods - Google Patents
A kind of mold automatic casting flow control methods Download PDFInfo
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- CN109822082A CN109822082A CN201910072025.5A CN201910072025A CN109822082A CN 109822082 A CN109822082 A CN 109822082A CN 201910072025 A CN201910072025 A CN 201910072025A CN 109822082 A CN109822082 A CN 109822082A
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- weight
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- ladle
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- flow rate
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Abstract
The present invention relates to a kind of mold automatic casting flow control methods, comprising steps of setting maximum pouring flow rate, maximum casting weight, record the initial weight of ladle；After casting starts, the current weight of a ladle is acquired at interval of the predetermined time；In casting process, current casting weight, current pouring flow rate are calculated according to the initial weight of ladle, current weight, according to the inclination angle for calculating the current casting weight obtained, current pouring flow rate control ladle；The application can calculate current pouring flow rate and casting weight automatically, automatically adjust the tilt angle of ladle by the current weight of acquisition ladle, so that current pouring flow rate can rapidly carry out automatic casting always close to maximum pouring flow rate.
Description
Technical field
The present invention relates to metal casting technique, especially a kind of mold automatic casting flow control methods.
Background technique
Metal casting is that the molten metal of high melt is cast in the good sand mold of preparatory moulding by casting ladle is intracavitary, after cooling
Casting is treated as by sand removal.Usually all it is manual control operation in present steel casting industry, is easy to appear movement and loses
It is accidentally and lack of standardization, cause quality accident；Pouring flow rate control is usually the operating experience according to worker, Bu Nengman in casting process
The dynamic of sufficient high temperature fluid continuous-stable is poured traffic requirement, is unable to control casting time and fills type flow velocity requirement, casting effect
Rate is low.
Summary of the invention
The purpose of the present invention is to provide a kind of mold automatic casting flow control methods, for solving existing metal casting
Casting flow cannot automatically control, be poured the problem of low efficiency in the process.
To solve the above-mentioned problems, the present invention provides a kind of mold automatic casting flow control methods, which is characterized in that packet
Include step:
S100. maximum pouring flow rate, maximum casting weight are set, the initial weight of ladle is recorded；
S200. after casting starts, the current weight of a ladle is acquired at interval of the predetermined time；
S300. in casting process, current casting weight, current casting are calculated according to the initial weight of ladle, current weight
Flow, the initial weight that the current casting weight is equal to ladle subtract the current weight of ladle, described current pouring flow rate etc.
In the ratio of the variable quantity of the current weight of ladle and unit time in the unit time；
S400. according to the inclination angle for calculating the current casting weight obtained, current pouring flow rate control ladle, if currently poured
It casts weight and is less than maximum casting weight, then the size of more current pouring flow rate and maximum pouring flow rate；If current casting stream
Amount is less than the inclination angle that maximum pouring flow rate then increases ladle, and current pouring flow rate is equal to maximum pouring flow rate and then keeps inclining for ladle
Angle is constant, and current pouring flow rate is greater than the inclination angle that maximum pouring flow rate then reduces ladle；If currently casting weight is equal to maximum
Casting weight controls ladle inclination angle zero then to stop casting.
Mold automatic casting flow control methods provided by the invention also have following technical characteristic:
Further, the current weight for acquiring ladle further includes S201: the predetermined time is T, and unit ms, T are less than
Equal to 200ms and 1000/ (5T) is positive integer, and after casting starts, the current weight of a ladle is acquired every the predetermined time
It measures and records, continuous 10 times ladle current weights are recorded as W (i), i=1to 10 respectively；It calculates in step S300 and currently pours
Casting weight, current pouring flow rate include:
Current casting weight=initial weight-W (10),
Further, the current weight for acquiring ladle further includes S202: weight after the current weight of 10 ladles of continuous acquisition
The current weight of new start recording ladle is simultaneously recorded as W (i) respectively, i=1to 10.
Further, the predetermined time is 50ms.
Further, in the mold automatic casting flow control methods, the current of ladle is acquired by ladle Weighing module
Weight, PLC control unit control the current weight of ladle Weighing module acquisition ladle and calculate current casting weight, current
Pouring flow rate.
Further, the PLC control unit is also connected with the motor at the inclination angle for controlling ladle, the PLC control
Unit is according to the inclination angle for calculating the current casting weight obtained, current pouring flow rate passes through the motor control ladle.
The invention has the following beneficial effects: the application by the current weight of acquisition ladle, can calculate automatically current
Pouring flow rate and casting weight, the tilt angle of ladle is automatically adjusted, so that current pouring flow rate is always close to maximum casting
Flow can rapidly carry out automatic casting.
Detailed description of the invention
Fig. 1 is the flow diagram of the mold automatic casting flow control methods of the embodiment of the present invention；
Fig. 2 is the calculating process example of current pouring flow rate in the embodiment of the present invention；
Fig. 3 is the angle change schematic diagram of ladle in the embodiment of the present invention；
Fig. 4 is the rotation drive structure schematic diagram of ladle in the embodiment of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the present invention can be combined with each other.
In one embodiment of mold automatic casting flow control methods of the invention as shown in Figure 1 to Figure 2, the mold
Automatic casting flow control methods, comprising steps of
S100. maximum pouring flow rate, maximum casting weight are set, the initial weight of ladle is recorded；
S200. after casting starts, the current weight of a ladle is acquired at interval of the predetermined time；
S300. in casting process, current casting weight, current casting are calculated according to the initial weight of ladle, current weight
Flow, the initial weight that the current casting weight is equal to ladle subtract the current weight of ladle, described current pouring flow rate etc.
In the ratio of the variable quantity of the current weight of ladle and unit time in the unit time；
S400. according to the inclination angle for calculating the current casting weight obtained, current pouring flow rate control ladle, if currently poured
It casts weight and is less than maximum casting weight, then the size of more current pouring flow rate and maximum pouring flow rate；If current casting stream
Amount is less than the inclination angle that maximum pouring flow rate then increases ladle, and current pouring flow rate is equal to maximum pouring flow rate and then keeps inclining for ladle
Angle is constant, and current pouring flow rate is greater than the inclination angle that maximum pouring flow rate then reduces ladle；If currently casting weight is equal to maximum
Casting weight controls ladle inclination angle zero then to stop casting.
The mold automatic casting flow control methods of the application can be calculated automatically by acquiring the current weight of ladle
Current pouring flow rate and casting weight, automatically adjusts the tilt angle of ladle, so that current pouring flow rate is always close to maximum
Pouring flow rate can rapidly carry out automatic casting.
In one embodiment of the application, it is preferable that the current weight for acquiring ladle further includes S201: the pre- timing
Between be T, unit ms, T are less than or equal to 200ms and 1000/ (5T) is positive integer, after casting starts, every the predetermined time
The current weight and record of a ladle are acquired, continuous 10 times ladle current weights are recorded as W (i), i=1to 10 respectively；
Current casting weight is calculated in step S300, current pouring flow rate includes:
Current casting weight=initial weight-W (10),
Specifically, the time interval of W (i+5) and W (i) is the weight of 5T, i 1 to 1000/ (5T) variation and read group total
Measuring reduction amount is the weight change value in 1S, thus can calculate the numerical value of current pouring flow rate KG/S；Calculating process response speed
Degree is fast, good to the adjustment continuity of flow, even if the intermediate current weight acquisition for having a ladle is wrong to entire calculated result
Influence it is also little, current pouring flow rate calculates high reliablity.
In one embodiment of the application, it is preferable that the current weight for acquiring ladle further includes S202: continuous acquisition 10
Restart to record the current weight of ladle after the current weight of secondary ladle and be recorded as W (i) respectively, i=1to 10 is described pre-
The T that fixes time is 50ms, then 1000/ (5T) is equal to 4, in this embodiment, The time interval of W (i+5) and W (i) is 250ms, and the weight reduction amount of read group total is 1S
Interior weight change value calculates the numerical value that institute's value is exactly current pouring flow rate KG/S.In this embodiment, current casting stream
The calculating of amount is executed by PLC control unit, calculating process example as shown in Fig. 2, 10 ladles of continuous acquisition current weight
Measuring weight (1) to weight (10) is 1 array, and weight is the current weight of ladle, and weight_increment is steel
Packet weight change amount, weight_in are casting weight；Calculation procedure has used the periodic cyclic program of 50ms in PLC, initialization
Program reads the current weight of ladle, weight (1) -- the current weight weight of ladle is all written in weight (10) array,
Initial program executes primary.
50ms periodic cyclic program reads ladle weight: circulation executes weight (i-1)=weight (i), i=2to10,
Current weight information is stored in weight (1) -- in weight (10) array.
50ms periodic cyclic program calculates ladle weight change amount:
Weight_increment=weight_increment+weight (i+5)-weight (i), i=1to 4.Journey
Data weight (i+5) and weight (i) interval time are 250ms in sequence, and program executes 4 times, therefore the weight calculated
Reduction amount is the value of 1s.So calculating the WEIGHT_DECREMENT value got is exactly current pouring flow rate kg/s.
The calculating for weight of casting is weight_in=initial weight-weight (10).
This calculation method, obtained pouring flow rate are that every 50ms calculates a flow value.Fast response time, to flow
Levelling continuity it is good.If centre has a value to be interfered, very little is influenced on entire calculated result, plays filtering
Effect.
In the mold automatic casting flow control methods of one embodiment of the application, acquired by ladle Weighing module
The current weight of ladle, PLC control unit control the current weight of the ladle Weighing module acquisition ladle and calculate and currently pour
Cast weight, current pouring flow rate.Preferably, as shown in Figure 3, Figure 4, the PLC control unit is also connected with for controlling ladle
The motor 11 at 10 inclination angle, the PLC control unit pass through electricity according to the current casting weight of calculating acquisition, current pouring flow rate
Machine 11 controls the inclination angle of ladle 10, specifically, motor 11 is connected by retarder 12 with ladle 10, on retarder or motor also
Equipped with the encoder 13 connecting with PLC control unit to acquire the current tilt angle of ladle, the positive and negative of motor thus can be passed through
It transfers and achievees the purpose that adjust steel plate tilt angle.
In the application of specifically casting of the application, maximum pouring flow rate 10kg/s, maximum casting weight 1000kg,
The parameter of maximum pouring flow rate, maximum casting weight is transferred to by control PLC, casting work process by MES system before casting
As follows: crane slings ladle automatic running to casting port position, and after receiving the order for starting casting, control system records current steel
Packet weight calculates current pouring flow rate；If present flow rate is 0 or pouring flow rate is less than 10kg/s, the overturning of system drive ladle
Motor rotating forward tilts ladle, increases pouring flow rate；If pouring flow rate is greater than or equal to 10kg/s, ladle, which overturns motor, to be stopped
Rotation, ladle no longer increase tilt angle；When weight of casting reaches 1000kg, system drive ladle overturning motor reversal makes steel
Packet returns zero-bit, and ladle tilt angle is by encoder feedback to system.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (6)
1. a kind of mold automatic casting flow control methods, which is characterized in that comprising steps of
Maximum pouring flow rate, maximum casting weight are set, the initial weight of ladle is recorded；
After casting starts, the current weight of a ladle is acquired at interval of the predetermined time；
In casting process, current casting weight, current pouring flow rate are calculated according to the initial weight of ladle, current weight, it is described
The initial weight that current casting weight is equal to ladle subtracts the current weight of ladle, and the current pouring flow rate is equal to the unit time
The variable quantity of the current weight of interior ladle and the ratio of unit time；
According to the inclination angle for calculating the current casting weight obtained, current pouring flow rate control ladle, if currently casting weight is small
It casts weight in maximum, then the size of more current pouring flow rate and maximum pouring flow rate；If current pouring flow rate is less than most
Big pouring flow rate then increases the inclination angle of ladle, and current pouring flow rate is equal to maximum pouring flow rate and then keeps the inclination angle of ladle constant,
Current pouring flow rate is greater than the inclination angle that maximum pouring flow rate then reduces ladle；If currently casting weight is equal to maximum casting weight
Amount controls ladle inclination angle zero then to stop casting.
2. mold automatic casting flow control methods according to claim 1, it is characterised in that: acquire the current weight of ladle
Amount further include: the predetermined time is T, and unit ms, it is positive integer that T, which is less than or equal to 200ms and 1000/ (5T), and casting starts
Afterwards, the current weight and record of a ladle are acquired every the predetermined time, continuous 10 times ladle current weights are remembered respectively
Record is W (i), i=1 to 10；Calculate current casting weight, current pouring flow rate includes:
Current casting weight=initial weight-W (10),
3. mold automatic casting flow control methods according to claim 2, it is characterised in that: the predetermined time is
50ms。
4. mold automatic casting flow control methods according to claim 1, it is characterised in that: acquire the current weight of ladle
Amount further include: restart to record the current weight of ladle after the current weight of 10 ladles of continuous acquisition and be recorded as W respectively
(i), i=1 to 10.
5. mold automatic casting flow control methods according to claim 1, it is characterised in that: the mold automatic casting stream
In amount control method, the current weight of ladle is acquired by ladle Weighing module, PLC control unit controls the ladle weighing mould
Block acquires the current weight of ladle and calculates current casting weight, current pouring flow rate.
6. mold automatic casting flow control methods according to claim 5, it is characterised in that: the PLC control unit
Be also connected with the motor at the inclination angle for controlling ladle, the PLC control unit according to calculate the current casting weight obtained, when
The inclination angle that preceding pouring flow rate passes through the motor control ladle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910072025.5A CN109822082A (en) | 2019-01-25 | 2019-01-25 | A kind of mold automatic casting flow control methods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910072025.5A CN109822082A (en) | 2019-01-25 | 2019-01-25 | A kind of mold automatic casting flow control methods |
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| CN109822082A true CN109822082A (en) | 2019-05-31 |
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ID=66862514
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| CN201910072025.5A Pending CN109822082A (en) | 2019-01-25 | 2019-01-25 | A kind of mold automatic casting flow control methods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451468A (en) * | 2020-05-11 | 2020-07-28 | 沈阳广泰真空科技有限公司 | Crucible control method and device in pouring process |
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Application publication date: 20190531 |