CN101452257B - Crank type flying shear control method and apparatus with head and tail shearing compensation - Google Patents
Crank type flying shear control method and apparatus with head and tail shearing compensation Download PDFInfo
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- CN101452257B CN101452257B CN2007101712569A CN200710171256A CN101452257B CN 101452257 B CN101452257 B CN 101452257B CN 2007101712569 A CN2007101712569 A CN 2007101712569A CN 200710171256 A CN200710171256 A CN 200710171256A CN 101452257 B CN101452257 B CN 101452257B
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Abstract
The invention discloses a flying crank shears control method with head and tail shearing compensation. The method comprises: after an electric current loop acquires output from a flying shears model machine, acquiring additional quantity for shearing a head part and additional quantity for shearing a tail part through an electric current loop via a site terminal; calculating the additional quantity for shearing the head part and the additional quantity for shearing the tail part respectively through an addition module and a subtraction module; exteriorly acquiring a select order for shearing the head and tail, and carrying out the calculation in turn through a numerical value conversion module, a division module and a coefficient calculating module in the electric current loop; acquiring a leading coefficient for shearing the head part and a lag coefficient for shearing the tail part, judging whether the coefficients are beyond preset limits, and adopting preset limit values if the coefficients exceed the preset limits; and outputting the processed results to a converter device through the electric current loop and continuing to control the flying shears to work.
Description
Technical field
The present invention relates to the control method in the steel process technology, relate in particular to the control method and the control device of flying crank shears.
Background technology
Flying crank shears is arranged on the roughing mill back, be used for shearing end to end to the roughing supplied materials, because the band steel stands different levels when rolling in the roughing district and vertical roll-force deviation, width control (AWC) automatically, width is controlled the temperature deviation of (PWC) and short stroke and de-scaling and air cooling effect generation continuously, make steel plate hold end to end to have irregular external form surface not meet technical standard and product requirement, must be sheared.Reduce vibrations in the time of can making head end enter mm finishing mill unit F1 frame like this and avoid impacting, coiling machine batches smoothly; And good tail end has also been created strong condition for the bale packing that is rolled into coil of strip;
The shearing force of present hot rolling unit flying shear can reach more than the 11MN, can shear thick 65mm, wide 1900mm, and temperature is low to moderate 900 ℃ spiral welding pipe X-70 steel plate.It is made up of cutting mechanism, toothed gearing, gearing, and cutting mechanism is made up of bent axle up and down and the connecting rod that is attached thereto, and cutting edge is contained on the connecting rod.In motion process, cutting edge moves along a curved path, and is vertical with rolled piece as far as possible to guarantee it, obtains shearing area preferably, because the section that this kind hot rolling need be sheared is bigger, adopted this kind flying shear, and its running part is made up of a reductor and a motor.The speed of the peripheral speed of cutting edge according to rolled piece is adopted in the control of shear rate, passes through formula:
Vx＝(1∽1.03)Vo
Wherein Vx is a shear rate, and Vo is the speed of rolled piece.
At present, the control method for flying shear is as follows:
Issue material parameter from the data management machine, comprise belt steel thickness and width;
Issue the material position from detecting element, comprise the physical location of being with steel;
The flying shear prototype obtains material parameter, comprises belt steel thickness, width and material position, comprises the physical location of being with steel;
The flying shear prototype calculates the back parameter and issues electric current loop, and this parameter is the output current of the current control loop of flying shear shearing, also is issued to speed ring, and this parameter is the output speed of the speed control loop of flying shear shearing;
The electric current loop output current is given converter plant, and the parameter of electric current loop output is a setup parameter, is generally 100%-103%;
Converter plant outputs to topworks;
Topworks outputs to backfeed loop;
Backfeed loop outputs to electric current loop to the parameter that obtains and carries out FEEDBACK CONTROL.
Because institute's cutting objects situation exists than big-difference, at present, the magnetic tape trailer phenomenon that head arch steel in the shear history and afterbody have appearred in flying shear when shearing, there is great hidden danger in the use for flying shear, serious restriction rolling line production capacity, cause unnecessary waste, head arch steel easily causes the bump of band steel to flying shear blade, may cause cutting edge to crash when serious, magnetic tape trailer when afterbody is sheared may singly cause being with the steel afterbody to bring De-scaling box or milling train into, cause serious accident, electric for this reason, machinery has also been done repeatedly and has been attempted, such as: the roller footpath of regular calibration measuring roller, electric modification shearing curve, mechanical adjustment blade gaps etc. all can't fundamentally overcome the above problems, so be necessary to flying shear end to end shearing compensation study, to find relevant solution.
Summary of the invention
The present invention aims to provide a kind of flying crank shears control technology of shearing compensation end to end that has, and compensates by the shearing end to end to flying shear, the magnetic tape trailer phenomenon when improving head arch steel in the ubiquitous shear history of present flying crank shears and afterbody and shearing.
The present invention is achieved as follows:
A kind of crank type flying shear control method of shearing compensation end to end that has at first is provided, comprises following step:
The data management machine issues material parameter;
Detecting element issues the material position;
The flying shear prototype obtains material parameter, material position from described data management machine and detecting element respectively;
The flying shear prototype calculates according to described material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop and speed ring;
Electric current loop is by the additional amount of on-site terminal collecting scissors crop portion and the additional amount of shearing afterbody;
Addition module in the electric current loop and subtraction block are calculated the additional amount of described shearing head and the additional amount of shearing afterbody respectively;
Obtain shearing select command end to end from the outside, calculate by the numerical value modular converter in the electric current loop, division module and coefficients calculation block successively simultaneously;
Obtain shearing the leading coefficient of head and shear the lag coefficient of afterbody, judge whether described coefficient surpasses preestablished limit, if surpass preestablished limit then adopt the preestablished limit value;
Electric current loop will output to converter plant through the result of above-mentioned processing;
Converter plant outputs to topworks;
Topworks outputs to backfeed loop;
Backfeed loop outputs to speed ring to the parameter that obtains and carries out FEEDBACK CONTROL.
The present invention also provides a kind of flying crank shears control device of shearing compensation end to end that has, and comprises following parts:
The data management machine is used to issue material parameter;
Detecting element is used to issue the material position;
The flying shear prototype, be connected to described data management machine and described detecting element, obtain material parameter, material position from described data management machine and detecting element respectively, this flying shear prototype calculates according to described material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop and speed ring;
Electric current loop is connected to the flying shear prototype, and wherein, this electric current loop comprises:
Addition module is connected to on-site terminal, and the additional amount of the shearing head of reception on-site terminal collection is also calculated;
Subtraction block is connected to on-site terminal, and the additional amount of the shearing afterbody of reception on-site terminal collection is also calculated;
The numerical value modular converter receives the select command of shearing end to end from the outside, and the result by addition module and subtraction block output is handled;
The division module, the output of logarithm value modular converter is handled;
Coefficients calculation block is handled the output of division module, and the lag coefficient that obtains shearing the leading coefficient of head and shear afterbody judges whether described coefficient surpasses preestablished limit,
If surpass preestablished limit then adopt the preestablished limit value, the output of coefficients calculation block is exported as the result of calculation of electric current loop;
Converter plant is connected to described electric current loop, and the output current of received current ring carries out outputing to topworks after unsteady flow is handled;
Topworks is connected to the output that described converter plant receives converter plant, and the output of this topworks is transported to backfeed loop;
Backfeed loop outputs to speed ring to the parameter that obtains from topworks and carries out FEEDBACK CONTROL;
Speed ring receives and carries out speed control from the output of flying shear prototype with from the output of backfeed loop.
Wherein, state the material parameter that the data management machine issues and comprise that the material position that belt steel thickness and width, described detecting element issue comprises that the parameter that is issued to electric current loop after the physical location of being with steel, described flying shear prototype calculate comprises the output current of the current control loop that flying shear is sheared, the parameter that is issued to speed ring comprises the output speed of the speed control loop that flying shear is sheared.
Addition module principle of work in the described electric current loop is as follows: the number that has polarity of input is carried out addition, be expressed as with mathematic(al) representation: Y=X01+ ... + Xnn; Wherein, Y represent and, be the full mold data type, default value is 0.0, scope at-3.4E38 between+the 3.4E38; X represents addend, is the full mold data type, and default value is 0.0; When flying shear shear zone steel toe portion, this addition module is delivered to the numerical value modular converter to the result afterwards to the header data of band steel and the additional amount addition of shearing head;
Subtraction block principle of work in the described electric current loop is as follows: the number that has polarity of input is subtracted each other, be expressed as with mathematic(al) representation: Y=X1-X2; Wherein, Y represents difference, is the full mold data type, and default value is 0.0, scope at-3.4E38 between+the 3.4E38; X1, X2 represent minuend, subtrahend respectively, all are the full mold data type, and default value is 0.0; When flying shear shear zone steel afterbody, this subtraction block is subtracted each other the tail data of band steel and the additional amount of shearing afterbody, afterwards the result is delivered to the numerical value modular converter;
This numerical value modular converter selects one of data that described addition module or subtraction block export to export; This numerical value modular converter is determined output addition module or subtraction block according to described shearing select command end to end, and one of them gives the division module data of being exported.
The principle of work of described division module is as follows: the input data of two full molds are divided by, the integral part of being discussed respectively, discussing, remainder, this division module receives the output of numerical value modular converter as dividend, the divisor predetermined with division module self carries out division arithmetic, and the quotient that obtains is exported as leading velocity factor.
Described coefficients calculation block is used to calculate the leading or hysteresis rate of flying shear speed, and its principle of work is as follows: K=KREF/COSa; Wherein: K is leading coefficient, and KREF is the leading velocity factor that obtains from the division module, and a is an angle relevant with the angle of shear; This coefficients calculation block receives the leading velocity factor of division module output, calculate in conjunction with the cosine value of flying shear angle of shear a, the angle factor of flying shear angle of shear a and the select command of shearing end to end, for shearing head, this coefficients calculation block is exported leading coefficient, and for shearing afterbody, this coefficients calculation block lag output coefficient.
Adopt this kind to have the crank type flying shear control method and the device of shearing compensation end to end, can obtain following advantage: can according to different band steel supplied materials thickness to flying shear end to end the shearing compensation parameter carry out online adjustment, improved in original shearing control method because the influence that supplied materials and equipment attrition are sheared band steel toe tail, improvement by control method, can realize carrying out parameter control, prevent the magnetic tape trailer phenomenon when head arch steel in the flying shear shear history and afterbody are sheared according to the different situation of equipment.
Description of drawings
Fig. 1 is the electrical diagram of the control device of flying crank shears of the present invention;
Fig. 2 is the structured flowchart of electric current loop of the present invention;
Fig. 3 is the logical diagram of numerical value modular converter in the electric current loop of the present invention;
Fig. 4 is the logical diagram of the division module in the electric current loop of the present invention.
Embodiment
The technology of the present invention finds that from the actual use in scene flying crank shears uses and peripheral supplied materials when changing long-term, magnetic tape trailer phenomenon when head arch steel that produces and afterbody are sheared is set out, the improvement that control technology end to end in the flying shear shear history is carried out, play and improve the flying shear long term operation stability, guaranteed the magnetic tape trailer phenomenon when flying shear shearing hot strip steel does not have head arch steel and afterbody shearing.
With reference to figure 1, it shows the structural drawing of the control device of flying crank shears of the present invention, and this control device 10 comprises:
Data management machine 11 is used to issue material parameter, comprises belt steel thickness and width.
Detecting element 12 is used to issue the material position, comprises the physical location of being with steel.
Flying shear prototype 13, be connected to data management machine 11 and detecting element 12, obtain material parameter, material position from data management machine 11 and detecting element 12 respectively, this flying shear prototype 13 calculates according to material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop 14 and speed ring 15.The parameter that is issued to electric current loop 14 after this flying shear prototype 13 calculates comprises the output current of the current control loop that flying shear is sheared, and the parameter that is issued to speed ring 15 comprises the output speed of the speed control loop that flying shear is sheared.
Electric current loop 14 is connected to flying shear prototype 13, and the main improvement of the present invention is the change to electric current loop 14, and with reference to shown in Figure 2, electric current loop 14 of the present invention comprises:
Numerical value modular converter 143 receives the select command of shearing end to end from the outside, and the result by addition module 141 and subtraction block 142 outputs is handled;
Division module 144, the output of logarithm value modular converter 143 is handled;
The detailed description of inner each parts of relevant electric current loop can illustrate below further.
Converter plant 16 is connected to electric current loop 14, and the output current of received current ring 14 carries out outputing to topworks 17 after unsteady flow is handled;
Topworks 17 is connected to the output that converter plant 16 receives converter plant 16, and the output of this topworks 17 is transported to backfeed loop 18;
Backfeed loop 18 outputs to speed ring 15 to the parameter that obtains from topworks 17 and carries out FEEDBACK CONTROL;
Speed ring 15 receives and carries out speed control from the output of flying shear prototype 13 with from the output of backfeed loop 18.
In above-mentioned electric current loop 14, addition module 141 principle of work are as follows: the number that has polarity of input is carried out addition, be expressed as with mathematic(al) representation:
Y＝X01+…+Xnn
Wherein, Y represent and, be the full mold data type, default value is 0.0, scope at-3.4E38 between+the 3.4E38; X represents addend, is the full mold data type, and default value is 0.0.When flying shear shear zone steel toe portion, this addition module is to the header data of band steel and the additional amount addition of shearing head, wherein, the header data of band steel is provided by data management machine 11 and detecting element 12, and additional amount is by the on-site terminal collection, and addition module 141 is delivered to numerical value modular converter 143 to the result afterwards.
Y＝X1-X2
Wherein, Y represents difference, is the full mold data type, and default value is 0.0, scope at-3.4E38 between+the 3.4E38; X1, X2 represent minuend, subtrahend respectively, all are the full mold data type, and default value is 0.0; When flying shear shear zone steel afterbody, this subtraction block is subtracted each other the tail data of band steel and the additional amount of shearing afterbody, wherein, the tail data of band steel is provided by data management machine 11 and detecting element 12, and additional amount is by the on-site terminal collection, and subtraction block 142 is delivered to numerical value modular converter 143 to the result afterwards.
One of data that these numerical value modular converter 143 selection addition modules 141 or subtraction block 142 are exported are exported.This numerical value modular converter 143 is determined output addition module 141 or subtraction block 142 according to the select command of shearing end to end, and one of them gives division module 144 data of being exported.With reference to shown in Figure 3, it is the logical diagram of numerical value modular converter 143 in the electric current loop of the present invention.Wherein, I represents selector switch, is the Boolean type data, and data are from described shearing select command end to end; X1 is the parameter that obtains through addition module 141; X2 is the parameter that obtains through subtraction block 142.Value converter 143 will be sheared binary numeral 0 that select command end to end sends or 1 data as the switch of numerical value dress parallel operation 143, value converter 143 is according to this switch order, the decision handle is exported from one in the data of addition module and subtraction block, passes to next module---division module 144.If the head order, just transmit the data of addition module 141.
The principle of work of division module 144 is as follows: the input data of two full molds are divided by, the integral part of being discussed respectively, discussing, remainder, this division module receives the output of numerical value modular converter as dividend, the divisor predetermined with division module self carries out division arithmetic, and the quotient that obtains is exported as leading velocity factor.With reference to figure 4, Fig. 4 is the logical diagram of the division module 144 in the electric current loop of the present invention.Wherein X1, X2 are respectively dividend and divisor, all are the full mold data types, and default value is 0.0 and 1.Y is the merchant, and default value is 0.0, its scope at-3.4E38 to+3.4E38.YIN is that the merchant rounds, and default value is 0.0.MOD is a remainder, and default value is 0.0.QF represent when divisor be 0 or merchant during super scope, QF=1 is set.Division module 144 receives from a last module, the data that are numerical value modular converter 143 are as dividend, what a divisor is this division module 144 itself set, described dividend and divisor are carried out division arithmetic, the quotient that obtains as next module, be the parameter of coefficients calculation block 145, promptly leading velocity factor.
K＝KREF/COSa；
Wherein: K is leading coefficient, and KREF is the leading velocity factor that obtains from the division module, and a is an angle relevant with the angle of shear.This coefficients calculation block 145 receives the leading velocity factor of division module 144 outputs, calculate in conjunction with the cosine value of flying shear angle of shear a, the angle factor of flying shear angle of shear a and the select command of shearing end to end, for shearing head, the leading coefficient of these coefficients calculation block 145 outputs, and for shearing afterbody, these coefficients calculation block 145 lag output coefficients.If the result exceeds the preestablished limit scope, just export the preestablished limit value.
Utilize the above-mentioned control device of the flying crank shears of shearing compensation end to end that has, the present invention also provides a kind of crank type flying shear control method of shearing compensation end to end that has, and comprises following step:
The data management machine issues material parameter;
Detecting element issues the material position;
The flying shear prototype obtains material parameter, material position from described data management machine and detecting element respectively;
The flying shear prototype calculates according to described material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop and speed ring;
Electric current loop is by the additional amount of on-site terminal collecting scissors crop portion and the additional amount of shearing afterbody;
Addition module in the electric current loop and subtraction block are calculated the additional amount of described shearing head and the additional amount of shearing afterbody respectively;
Obtain shearing select command end to end from the outside, calculate by the numerical value modular converter in the electric current loop, division module and coefficients calculation block successively simultaneously;
Obtain shearing the leading coefficient of head and shear the lag coefficient of afterbody, judge whether described coefficient surpasses preestablished limit, if surpass preestablished limit then adopt the preestablished limit value;
Electric current loop will output to converter plant through the result of above-mentioned processing;
Converter plant outputs to topworks;
Topworks outputs to backfeed loop;
Backfeed loop outputs to speed ring to the parameter that obtains and carries out FEEDBACK CONTROL.
Need to prove that all details that above-mentioned combination has a control device introduction of the flying crank shears of shearing compensation end to end can be used in this control method with flying crank shears of shearing compensation end to end.
Of the present invention have the control method of the flying crank shears of shearing compensation end to end and have the operating characteristic that the control device of the flying crank shears of shearing compensation has end to end improved the hot strip mill flying shear, the characteristics long at the time between overhauls(TBO) of hot rolling mill flying shear simultaneously, that shearing displacement is big, from the scene, improvement on the disposal route when shearing end to end to flying shear, thereby improve the flying shear long term operation stability, guarantee the magnetic tape trailer phenomenon when flying shear shearing hot strip steel does not have head arch steel and afterbody shearing, be adapted at applying of all kinds of large-scale flying crank shears of hot rolling.
Claims (10)
1. one kind has the crank type flying shear control method of shearing compensation end to end, comprising:
The data management machine issues material parameter;
Detecting element issues the material position;
The flying shear prototype obtains material parameter, material position from described data management machine and detecting element respectively;
The flying shear prototype calculates according to described material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop and speed ring;
Electric current loop is by the additional amount of on-site terminal collecting scissors crop portion and the additional amount of shearing afterbody;
Addition module in the electric current loop and subtraction block are calculated the additional amount of described shearing head and the additional amount of shearing afterbody respectively;
Obtain shearing select command end to end from the outside, calculate by the numerical value modular converter in the electric current loop, division module and coefficients calculation block successively simultaneously;
Obtain shearing the leading coefficient of head and shear the lag coefficient of afterbody, judge whether described coefficient surpasses preestablished limit, if surpass preestablished limit then adopt the preestablished limit value;
Electric current loop will output to converter plant through the result of above-mentioned processing;
Converter plant outputs to topworks;
Topworks outputs to backfeed loop;
Backfeed loop outputs to speed ring to the parameter that obtains and carries out FEEDBACK CONTROL.
2. as claimed in claim 1 have a crank type flying shear control method of shearing compensation end to end, it is characterized in that,
The material parameter that described data management machine issues comprises belt steel thickness and width;
The material position that described detecting element issues comprises the physical location of being with steel;
The parameter that is issued to electric current loop after described flying shear prototype calculates comprises the output current of the current control loop that flying shear is sheared, and the parameter that is issued to speed ring comprises the output speed of the speed control loop that flying shear is sheared.
3. as claimed in claim 1 have a crank type flying shear control method of shearing compensation end to end, it is characterized in that,
Addition module principle of work in the described electric current loop is as follows: the number that has polarity of input is carried out addition, be expressed as with mathematic(al) representation:
Y＝X01+…+Xnn
Wherein, Y represent and, be the full mold data type, default value is 0.0, scope at-3.4E38 between+the 3.4E38; X represents addend, is the full mold data type, and default value is 0.0; When flying shear shear zone steel toe portion, this addition module is delivered to the numerical value modular converter to the result afterwards to the header data of band steel and the additional amount addition of shearing head;
Subtraction block principle of work in the described electric current loop is as follows: the number that has polarity of input is subtracted each other, be expressed as with mathematic(al) representation:
Y＝X1-X2
Wherein, Y represents difference, is the full mold data type, and default value is 0.0, scope at-3.4E38 between+the 3.4E38; X1, X2 represent minuend, subtrahend respectively, all are the full mold data type, and default value is 0.0; When flying shear shear zone steel afterbody, this subtraction block is subtracted each other the tail data of band steel and the additional amount of shearing afterbody, afterwards the result is delivered to the numerical value modular converter;
This numerical value modular converter selects one of data that described addition module or subtraction block export to export; This numerical value modular converter is determined output addition module or subtraction block according to described shearing select command end to end, and one of them gives the division module data of being exported.
4. as claimed in claim 3 have a crank type flying shear control method of shearing compensation end to end, it is characterized in that, the principle of work of described division module is as follows: the input data of two full molds are divided by, the integral part of being discussed respectively, discussing, remainder, this division module receives the output of numerical value modular converter as dividend, the divisor predetermined with division module self carries out division arithmetic, and the quotient that obtains is exported as leading velocity factor.
5. as claimed in claim 4 have a crank type flying shear control method of shearing compensation end to end, it is characterized in that, described coefficients calculation block is used to calculate the leading or hysteresis rate of flying shear speed, and its principle of work is as follows:
K＝KREF/COSa；
Wherein: K is leading coefficient, and KREF is the leading velocity factor that obtains from the division module, and a is an angle relevant with the angle of shear;
This coefficients calculation block receives the leading velocity factor of division module output, calculate in conjunction with the cosine value of flying shear angle of shear a, the angle factor of flying shear angle of shear a and the select command of shearing end to end, for shearing head, this coefficients calculation block is exported leading coefficient, and for shearing afterbody, this coefficients calculation block lag output coefficient.
6. one kind has the flying crank shears control device of shearing compensation end to end, comprising:
The data management machine is used to issue material parameter;
Detecting element is used to issue the material position;
The flying shear prototype, be connected to described data management machine and described detecting element, obtain material parameter, material position from described data management machine and detecting element respectively, this flying shear prototype calculates according to described material parameter and material position, and the parameter that obtains after calculating is issued to electric current loop and speed ring;
Electric current loop is connected to the flying shear prototype, and wherein, this electric current loop comprises:
Addition module is connected to on-site terminal, and the additional amount of the shearing head of reception on-site terminal collection is also calculated;
Subtraction block is connected to on-site terminal, and the additional amount of the shearing afterbody of reception on-site terminal collection is also calculated;
The numerical value modular converter receives the select command of shearing end to end from the outside, and the result by addition module and subtraction block output is handled;
The division module, the output of logarithm value modular converter is handled;
Coefficients calculation block, output to the division module is handled, the lag coefficient that obtains shearing the leading coefficient of head and shear afterbody, judge whether described coefficient surpasses preestablished limit, if surpass preestablished limit then adopt the preestablished limit value, the output of coefficients calculation block is exported as the result of calculation of electric current loop;
Converter plant is connected to described electric current loop, and the output current of received current ring carries out outputing to topworks after unsteady flow is handled;
Topworks is connected to the output that described converter plant receives converter plant, and the output of this topworks is transported to backfeed loop;
Backfeed loop outputs to speed ring to the parameter that obtains from topworks and carries out FEEDBACK CONTROL;
Speed ring receives and carries out speed control from the output of flying shear prototype with from the output of backfeed loop.
7. as claimed in claim 6 have a flying crank shears control device of shearing compensation end to end, it is characterized in that,
The material parameter that described data management machine issues comprises belt steel thickness and width;
The material position that described detecting element issues comprises the physical location of being with steel;
The parameter that is issued to electric current loop after described flying shear prototype calculates comprises the output current of the current control loop that flying shear is sheared, and the parameter that is issued to speed ring comprises the output speed of the speed control loop that flying shear is sheared.
8. as claimed in claim 6 have a flying crank shears control device of shearing compensation end to end, it is characterized in that,
Addition module principle of work in the described electric current loop is as follows: the number that has polarity of input is carried out addition, be expressed as with mathematic(al) representation:
Y＝X01+…+Xnn
Wherein, Y represent and, be the full mold data type, default value is 0.0, scope at-3.4E38 between+the 3.4E38; X represents addend, is the full mold data type, and default value is 0.0; When flying shear shear zone steel toe portion, this addition module is delivered to the numerical value modular converter to the result afterwards to the header data of band steel and the additional amount addition of shearing head;
Subtraction block principle of work in the described electric current loop is as follows: the number that has polarity of input is subtracted each other, be expressed as with mathematic(al) representation:
Y＝X1-X2
Wherein, Y represents difference, is the full mold data type, and default value is 0.0, scope at-3.4E38 between+the 3.4E38; X1, X2 represent minuend, subtrahend respectively, all are the full mold data type, and default value is 0.0; When flying shear shear zone steel afterbody, this subtraction block is subtracted each other the tail data of band steel and the additional amount of shearing afterbody, afterwards the result is delivered to the numerical value modular converter;
This numerical value modular converter selects one of data that described addition module or subtraction block export to export; This numerical value modular converter is determined output addition module or subtraction block according to described shearing select command end to end, and one of them gives the division module data of being exported.
9. as claimed in claim 8 have a flying crank shears control device of shearing compensation end to end, it is characterized in that, the principle of work of described division module is as follows: the input data of two full molds are divided by, the integral part of being discussed respectively, discussing, remainder, this division module receives the output of numerical value modular converter as dividend, the divisor predetermined with division module self carries out division arithmetic, and the quotient that obtains is exported as leading velocity factor.
10. as claimed in claim 9 have a flying crank shears control device of shearing compensation end to end, it is characterized in that, described coefficients calculation block is used to calculate the leading or hysteresis rate of flying shear speed, and its principle of work is as follows:
K＝KREF/COSa；
Wherein: K is leading coefficient, and KREF is the leading velocity factor that obtains from the division module, and a is an angle relevant with the angle of shear;
This coefficients calculation block receives the leading velocity factor of division module output, calculate in conjunction with the cosine value of flying shear angle of shear a, the angle factor of flying shear angle of shear a and the select command of shearing end to end, for shearing head, this coefficients calculation block is exported leading coefficient, and for shearing afterbody, this coefficients calculation block lag output coefficient.
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| CN2007101712569A CN101452257B (en) | 2007-11-29 | 2007-11-29 | Crank type flying shear control method and apparatus with head and tail shearing compensation |
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| CN2007101712569A CN101452257B (en) | 2007-11-29 | 2007-11-29 | Crank type flying shear control method and apparatus with head and tail shearing compensation |
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| CN102087532B (en) * | 2009-12-03 | 2013-09-25 | 唐山国丰钢铁有限公司 | Method for controlling flying shear |
| CN102023610B (en) * | 2010-10-14 | 2012-08-15 | 中冶华天南京自动化工程有限公司 | Method and device for achieving positioning and shearing control of flying shear by process software |
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