CN101441462A - Shearing control method and control device of disc shear - Google Patents
Shearing control method and control device of disc shear Download PDFInfo
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- CN101441462A CN101441462A CNA2008102177462A CN200810217746A CN101441462A CN 101441462 A CN101441462 A CN 101441462A CN A2008102177462 A CNA2008102177462 A CN A2008102177462A CN 200810217746 A CN200810217746 A CN 200810217746A CN 101441462 A CN101441462 A CN 101441462A
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Abstract
The invention relates to a shearing control method and a shearing control device for circle shears. The method comprises the following steps: when the head of a steel strip reaches the front parts of entrance pinch rolls, a command sender takes the entrance pinch rolls as a speed command body to send a shearing and biting speed command; when the head of the steel strip reaches a main cutting edge, the command sender takes the main cutting edge as the speed command body, maintains the shearing and biting speed, and controls the entrance pitch rolls to follow and be synchronous with the linear speed of the main cutting edge; and when the head of the steel strip reaches exit pitch rolls, the command sender takes the main cutting edge as the speed command body to send an acceleration command, controls the main cutting edge to speed up to achieve the shearing speed required in a high-speed shearing command within 0.5 to 2 seconds, and controls the exit pinch rolls to follow and be synchronous with the linear speed of the main cutting edge. The control method and the control device effectively reduce instantaneous impact loads withstood by all mechanical parts at the time of biting, prolong the service life of shearing equipment, reduce maintenance cost, reduce the failure rate of a clamping chute at a cutting edge, and improve equipment stability and utilization rate.
Description
Technical field
The present invention relates to a kind of steel plate processing and manufacturing equipment and technology, more particularly, the present invention relates to a kind of rotary shear equipment of rolled plate and shear control method.
Background technology
The domestic production line that thirties medium plates are arranged at present, in the Runout area of steel rolling production-line, limit portion shearing equipment mainly contains bilateral scissors and two kinds of device types of circle shear.To adopting the production line of rotary shear equipment, at present, shearing machine body electric drive system generally adopts variable frequency regulating speed control, 0-50 rev/mins of speed adjustable ranges; Wherein, shear rotating speed and be commonly referred to as " low velocity shear " below 20 rev/mins, shear rotating speed and be commonly referred to as " high speed shear " more than 20 rev/mins.
The shearing control procedure that the tradition circle shear extensively adopts is as follows: the operator sends cut command according to incoming band steel thickness setting shear rate; From cutting edge is nipped the overall process that incoming band steel finishes to shearing, all shear by the constant speed of setting.But there are the following problems for the control method that this constant speed is sheared:
If constant speed is set at low speed, the instantaneous shock load of nipping that cutting edge and each mechanical part of kinematic train are born is less, the broken limit of downcutting after nipping is entering broken limit chute and subsequent is moving comparatively steady, the probability of failure of broken checkpost chute is lower, each mechanical part of kinematic train and cutting edge are all had the better protect effect, prolonged the serviceable life of equipment; But shear rate does not satisfy the requirement of High-efficient Production rhythm.
If setting speed is at a high speed, because the instantaneous shock load of nipping is bigger, shock load was bigger when particularly high-strength thick-specification was sheared, and because of the broken limit of downcutting is the passive movement state, the not stationarity that excessive velocities will cause moving increases greatly, and probability of failure also increases greatly, thus cause equipment such as cutting edge accelerate to damage and broken checkpost chute failure rate higher, cause often to produce and interrupt, seriously restricted rhythm of production.
The problems referred to above also form long-term puzzlement to industry: to adopting the steel rolling production-line of rotary shear equipment, industry is considered will be in the transformation of steel rolling production-line, abandon equipment status still to belong to intact circle shear and adopt bilateral scissors, thereby face very big waste economically and difficult prospect that personnel/technology remodeling adapts to again; For at the new steel rolling production-line of building, industry just can not be selected circle shear for use and can only face unique type selecting of bilateral scissors on equipment, cause the simplification of lectotype selection, causes technology and is on a sticky wicket economically.
Summary of the invention
At requiring, the objective of the invention is to provide a kind of circle shear to shear control method and control device thereof, this control method and control device thereof have following advantage: instantaneous each mechanical part suffered shock load has effectively reduced to nip, prolong shearing equipment serviceable life, reduce maintenance cost, reduce the probability of failure of the card chute of cutting edge simultaneously, improved the stability and the utilization factor of equipment.
For this reason, one of technical solution of the present invention is the controller that described circle shear comprises entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, control device and output control command thereof, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, and described control device has been set up the speed regulator of following the tracks of tracker, each pinch roll and the main cutting edge of steel plate position; This control method comprises the steps:
A): the operation and the position of described tracker monitoring steel plate;
Does B): described tracker judge that steel plate head arrives the entrance pinch roll front portion? as be not judged as not, return steps A, as to be judged as be to forward step C to): described controller is that speed makes main body send shearing the biting speed order with the entrance pinch roll;
D): behind the step C, does described tracker judge that steel plate head arrives main cutting edge? as be judged as not, go back to step C, as be judged as and be, forward step e to): described controller is that speed makes main body, keeps the shearing biting speed constant with main cutting edge, simultaneously, the control entrance pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
F): after the step e, does described tracker judge that steel plate head arrives the outlet pinch roll? as be judged as not, go back to step e, as be judged as and be, forward step G to): described controller is that speed makes main body send the acceleration order with main cutting edge, control main cutting edge and quicken to reach the shear rate of high speed shear order in time second and keep high speed at 0.5-2, simultaneously, control outlet pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
H): behind the step G, does described tracker judge that the steel plate afterbody arrives between main cutting edge and the outlet pinch roll? as be judged as not, go back to step G, as be judged as and be, forward step I to): described controller is that speed makes main body and keeps its high-speed cruising state constant with the outlet pinch roll, simultaneously, stop main cutting edge and entrance pinch roll;
Does J): behind the step I, described tracker judge that the steel plate afterbody leaves the outlet pinch roll? as be not judged as not, go back to step I, as to be judged as be to forward step K to): described controller finishes the speed command of outlet pinch roll, and the material state for the treatment of is got back to by system.
Control method essence of the present invention, utilize newly-increased tracker to calculate exactly, on the monitoring production line respectively with the position of steel, correspondingly, the band steel position that puts in place that newly-increased controller records according to tracker, to each pinch roll, the control command that rotating speed is regulated in the speed regulator output of main cutting edge, control the rotating speed and the linear velocity of each pinch roll and main cutting edge, make circle shear realize to arriving the bit strip steel, steel plate is made the shearing program of " low speed nip high speed shear ", thereby reduced to nip the suffered shock load of instantaneous each mechanical part of steel plate effectively, reduced the probability of failure of the card chute of cutting edge simultaneously, prolong service life of equipment, reduce maintenance cost, improve the stability and the utilization factor of equipment, be particularly suitable for the control of rotary shear equipment on the medium plate production line, operation and application.
Evidence: control method of the present invention and shearing program have the following aspects beneficial effect: failure rate reduces greatly, has realized the continuous production of stability and high efficiency; Significantly reduce by shearing the relevant device failure rate that causes in the production line, strengthened the stability of system; Obtain significant technique effect, also obtained considerable economic and social benefit; Particularly, the advantage of the control method of the present invention and the program of shearing is as follows:
One, equipment operation rate, utilization factor significantly promote.
With average thickness 16mm is example, adopts control method of the present invention and shearing program, and every steel plate can be saved 11 seconds production times, and equipment operation rate improves 38%.Day shears tonnage and promotes the highest level that reaches domestic equipment of the same type.
Two, steel-fastening failure rate descends.
After adopting control method of the present invention and shearing program, be reduced to present about 1% by traditional monthly average steel-fastening failure rate 8%.Calculate by activity durations of 720 hours every month, then can reduce the fault 50.4 hours product time of mistake in every month, by mean hours 130 tons/hour of output, 50 yuan of/ton meters of ton plate benefit then can be created economic benefit in every month: 50.4 * 130 * 50=327600 unit more.Then can create economic benefit the whole year: 327600 * 12=3931200 unit more.The newly-increased economic benefit of control method of the present invention is very outstanding.
Three, stabilization of equipment performance significantly promotes.
After adopting control method of the present invention and shearing program, the vibration of plant equipment and electrical system and current value are all comparatively stable, to management maintenance working strength and all reductions greatly of spare parts consumption of system.Tradition shearing technique and equipment, a pair of chute only reaches 1 month service time.After adopting control method of the present invention, a pair of chute can reach 4 months service time.Then month saving spare parts consumption quantity is 0.75 pair, and every pair of chute is by 7000 yuan, and then can save the spare part expense in every month is 0.75 * 7000=5250 unit.Year can be saved 6300 yuan.The shearing displacement of broken limit blade is far longer than 1500 tons traditional/sheet greater than 2500 tons/sheet, and year can be saved about 200 on blade, and year can be saved about 40000 yuan of blade spare parts.
Because above-mentioned advantage, control method of the present invention and shearing program all have very high reference to similar devices, similar applications and are worth and wide enforcement promotion prospect.A kind of controlling schemes of very strong competitive power is provided when transforming and build steel rolling production-line for industry.
Control method of the present invention also comprises following concrete improvement:
In order to optimize tracker the band steel that moves on the production line is carried out accurate position calculation and tracking, described tracker comprises computing machine, and also comprise the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, the speed data of described each tachogenerator of computer acquisition is carried out the run location that mathematical computations is followed the tracks of steel plate; Concrete computing method can adopt method such as numerical integration as:
Incoming band steel at the range ability in circle shear district is
Wherein V is occupying the instant travelling speed in district for the band steel, and velocity amplitude is directly measured by scrambler; And then the band steel toe position Lh of portion can be calculated by following formula: L
h=L
z-L
r, L wherein
zActual physics length for the circle shear shear zone.
When described tracker confirms that steel plate head arrives the perpendicular bisector position of pinch roll, described controller is controlled the top roll of this pinch roll from preparing highly to depress and carry out corresponding speed order, when described tracker confirmed that the steel plate afterbody arrives described pinch roll perpendicular bisector position, the top roll that described controller is controlled this pinch roll was lifted to the preparation height and stops corresponding speed order.
Guarantee that for more effective tracker carries out the adjustment of accurate position calculation and tracking and Working position to head, the afterbody of the band steel that moves on the production line, strengthen closed-loop control, described control device also comprises the metal detector that is arranged on each pinch roll front portion, metal detector is surveyed steel plate, and described control device feeds back to the position of described tracker in order to calibration steel plate with detectable signal.
For the continuity of strengthening shear action, guarantee the fairness that is connected at the front and back station with steel:
Also comprise following operation B1 before the described step C): after the metal detection utensil of entrance pinch roll front portion detects the head of steel plate, the position correction before described controller cuts across the steel plate that puts in place; Also comprise following operation F1 before the described step G): after the metal detection utensil of outlet pinch roll front portion detects the head of steel plate, the position correction during described controller is sheared the steel plate that puts in place.
Among the described step C, send when shearing the biting speed order, described controller is controlled main cutting edge and is followed the linear velocity of entrance pinch roll and keep synchronous; Among the described step B, described tracker verifies according to the signal of the metal detector of entrance pinch roll front portion whether steel plate head arrives the front portion of entrance pinch roll; In the described step F, described tracker verifies according to the signal of the metal detector of outlet pinch roll front portion whether steel plate head arrives the outlet pinch roll; Among the described step H, described tracker verifies according to the signal of the metal detector of outlet pinch roll front portion whether the steel plate afterbody arrives between main cutting edge and the outlet pinch roll.
Can on same production line, process the band steel of many kinds, most amounts continuously, automatically, simultaneously in order better to guarantee tracker:
Described controller comprises data server, the PLC controller of the shearing information of monitoring steel plate, the steel plate position that this data server records according to described tracker and all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of the steel plate that puts in place are carried out speeds match, and various speed are in time assigned to each speed regulator by described PLC controller, realize that speed change shears.
Described tracker also comprises the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, the velocity amplitude that described controller also records each tachogenerator feeds back to data server and/or PLC controller, realizes the closed-loop control to each speed regulator.And in the past conventional art, control mode adopts open loop control usually; Usually do not adopt tachogenerator, when adopting 8 coding rate sensors to realize closed-loop control among the technology of the present invention embodiment, velocity amplitude is fed back to the position that tracking control server is calculated rolled piece.
Correspondingly, another correlation technique solution of the present invention is a kind of employing control device of circle shear shearing control method as mentioned above, it comprises the controller of exporting control command, described circle shear comprises entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, it is characterized in that: described control device also comprises the speed regulator of tracker, each pinch roll and the main cutting edge of following the tracks of steel plate position; The steel plate position that described controller is determined according to described tracker sends corresponding speed command to each speed regulator in good time.
Evidence: control device of the present invention has the following aspects beneficial effect: one, equipment operation rate, utilization factor significantly promote.Two, steel-fastening failure rate descends.Three, stabilization of equipment performance significantly promotes.In other words, the failure rate of control device of the present invention reduces greatly, has realized the continuous production of stability and high efficiency; Significantly reduce by shearing the relevant device failure rate that causes in the production line, strengthened the system stability of production line; Obtain significant technique effect, also obtained considerable economic and social benefit.
And because above-mentioned advantage, control device of the present invention all has very high reference to similar devices, similar applications and is worth and wide enforcement promotion prospect.A kind of lectotype selection of very strong competitive power is provided when transforming and build steel rolling production-line for industry.
Control device of the present invention also comprises following concrete improvement:
In order to optimize tracker the band steel that moves on the production line is carried out accurate position calculation and tracking: described control device also comprises the metal detector that is arranged on each pinch roll front portion, metal detector is surveyed steel plate, and described control device feeds back to the position of described tracker in order to calibration steel plate with detectable signal; Described tracker comprises computing machine, and also comprises the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, and the speed data of described each tachogenerator of computer acquisition is carried out the run location that mathematical computations is followed the tracks of steel plate.
Can process the band steel of polytype, most amounts continuously, automatically, simultaneously in order better to guarantee tracker on same production line: described controller comprises data server, the PLC controller of the shearing information of monitoring steel plate, the steel plate position that this data server records according to described tracker and all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of the steel plate that puts in place are carried out speeds match, and various speed are in time assigned to each speed regulator by described PLC controller, realize that speed change shears.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the schematic block diagram of the inventive method embodiment 1.
Fig. 2 is the schematic block diagram of the inventive method embodiment 2.
Fig. 3 is the control device schematic block diagram of apparatus of the present invention embodiment.
Fig. 4 is the physical construction synoptic diagram of apparatus of the present invention embodiment.
Embodiment
Method embodiment 1.
As Fig. 1, be depicted as the schematic block diagram of the inventive method embodiment 1.Described circle shear comprises entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, the control device of described circle shear comprises the tracker of track band steel position, the speed regulator of controller, each pinch roll and main cutting edge of output control command, and this control method is executed example 1 and comprised the steps:
A): the operation and the position of described tracker monitoring band steel;
Does B): described tracker judge that band steel toe portion arrives the entrance pinch roll front portion? as be not judged as not, return steps A, as to be judged as be to forward step C to): described controller is that speed makes main body send shearing the biting speed order with the entrance pinch roll;
D): behind the step C, does described tracker judge that band steel toe portion arrives main cutting edge? as be judged as not, go back to step C, as be judged as and be, forward step e to): described controller is that speed makes main body, keeps the shearing biting speed constant with main cutting edge, simultaneously, the control entrance pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
F): after the step e, does described tracker judge that band steel toe portion arrives the outlet pinch roll? as be judged as not, go back to step e, as be judged as and be, forward step G to): described controller is that speed makes main body send the acceleration order with main cutting edge, control main cutting edge and quicken to reach the shear rate of high speed shear order in time second and keep high speed at 0.5-2, simultaneously, control outlet pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
H): behind the step G, does described tracker judge that band steel afterbody arrives between main cutting edge and the outlet pinch roll? as be judged as not, go back to step G, as be judged as and be, forward step I to): described controller is that speed makes main body, keeps high speed shear speed constant with the outlet pinch roll, simultaneously, stop main cutting edge and entrance pinch roll;
Does J): behind the step I, described tracker judge that band steel afterbody leaves the outlet pinch roll? as be not judged as not, go back to step I, as to be judged as be to forward step K to): described controller finishes the speed command of outlet pinch roll, switches to the shearing of next band steel.
Method embodiment 2.
As Fig. 2, be depicted as the schematic block diagram of the inventive method embodiment 2.Circle shear described in this method comprises entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, the control device of described circle shear comprises the tracker of track band steel position, the speed regulator of controller, each pinch roll and main cutting edge of output control command
Described tracker comprises computing machine, and also comprises the tachogenerator that is arranged on each pinch roll lower roll 2 side and main cutting edge 2 sides, and the speed data of described each tachogenerator of computer acquisition is carried out the run location that mathematical computations is come the track band steel;
Described control device also comprises the metal detector that is arranged on each pinch roll front portion, and metal detector is surveyed the band steel, and described control device feeds back to the position of described tracker in order to verification band steel with detectable signal.
Described controller comprises data server, the PLC controller of the shearing information of monitoring band steel, the band steel position that this data server records according to described tracker and to all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of bit strip steel: carry out speeds match, and various speed are in time assigned to each speed regulator by described PLC controller, realize that speed change shears.The velocity amplitude that described controller also records each tachogenerator feeds back to data server and/or PLC controller, realizes the closed-loop control to each speed regulator.
This control method comprises the steps:
A): the operation and the position of described tracker monitoring band steel;
Is B): described tracker gathered the signal of the metal detector of entrance pinch roll front portion simultaneously and is verified, judges that band steel toe portion arrives the entrance pinch roll front portion? as be judged as not, return steps A, as to be judged as be to forward step B1 earlier to): described controller is to the position correction before cutting across to the bit strip steel; Forward step C again to): described controller is that speed makes main body send the order of shearing biting speed with the entrance pinch roll; Simultaneously, described controller is controlled main cutting edge and is followed the linear velocity of entrance pinch roll and keep synchronous;
D): behind the step C, does described tracker judge that band steel toe portion arrives main cutting edge? as be judged as not, go back to step C, as be judged as and be, forward step e to): described controller is that speed makes main body, keeps the shearing biting speed constant with main cutting edge, simultaneously, the control entrance pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
After the step e, forward step F 1 earlier to): after the metal detection utensil of outlet pinch roll front portion detects the head of band steel, described controller is to the position correction in shearing to the bit strip steel, forward step F again to): described tracker is gathered the signal of the metal detector of outlet pinch roll front portion simultaneously and is verified, do you judge that band steel toe portion arrives the outlet pinch roll? as be judged as not, go back to step e, as be judged as and be, G): described controller is that speed makes main body send the acceleration order with main cutting edge, controlling main cutting edge quickens to reach the shear rate of high speed shear order and keeps high speed at 0.5-2 in time second, simultaneously, control outlet pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
H): behind the step G, is described tracker gathered the signal of the metal detector of outlet pinch roll front portion simultaneously and is verified that judgement band steel afterbody arrives between main cutting edge and the outlet pinch roll? as be judged as not, go back to step G, as be judged as and be, forward step I to): described controller is that speed makes main body, keeps high speed shear speed constant with the outlet pinch roll, simultaneously, stop main cutting edge and entrance pinch roll;
Does J): behind the step I, described tracker judge that band steel afterbody leaves the outlet pinch roll? as be not judged as not, go back to step I, as to be judged as be to forward step K to): described controller finishes the speed command of outlet pinch roll, switches to the shearing of next band steel.
In above-mentioned relevant step, when described tracker confirms that band steel toe portion arrives the perpendicular bisector position of pinch roll or main cutting edge, described controller is controlled the top roll of this pinch roll or main cutting edge from preparing highly to depress and carry out corresponding speed order, when described tracker confirmed that band steel afterbody arrives described pinch roll or main cutting edge perpendicular bisector position, the top roll that described controller is controlled this pinch roll or main cutting edge was lifted to the preparation height and stops corresponding speed order.
Device embodiment.
As Fig. 3,4, shown in be respectively control device schematic block diagram and the physical construction synoptic diagram of apparatus of the present invention embodiment.This circle shear comprises entrance pinch roll 10, main cutting edge 20, outlet pinch roll 30, rollgang 40, cataclasmly cuts 50.Described pinch roll 10,30 all comprises top roll, lower roll respectively, and described cutting edge 20 comprises lower scissor blade and upper scissor blade.
And described control device comprises the tracker of track band steel S position, near the speed regulator 13,23,33 (being installed in each roller and the main cutting edge position) of controller, each pinch roll and main cutting edge of output control command, and it comprises the drive motor (all will not know clearly and show) of Frequency Converter Control; Corresponding speed command is sent to each speed regulator 13,23,33 in the band steel S position that described controller is determined according to described tracker in good time, and is specific as follows:
Described tracker comprises computing machine 60 and also comprises and be arranged on each pinch roll 10,30 lower rolls 2 side, main cutting edge 2 sides and the cataclasm tachogenerator 12,22,32,52 of cutting 50 2 sides amounts to 8 (being the velometer of incremental rotary encoder formula) that they record the speed data of each point.Described controller comprises data server 70, PLC controller 71, the man-machine interface 72 of the shearing information of monitoring band steel.Described control device also comprise be separately positioned on each pinch roll 10,30 front portion, to the band steel S metal detector 11,31 surveyed of portion end to end.Metal detector 11 is installed in preceding 1.5 meters of circle shear entrance pinch roll, and apart from main cutting edge 2.8m, metal detector 31 is installed in preceding 0.2 meter of circle shear outlet pinch roll, respectively shown in Fig. 4 lower number.Its function is that if be with steel to skid when position that tracking server calculates and physical location were variant, metal detector was proofreaied and correct band steel physical location, makes tracking control server correct position deviation automatically in operational process.
Be set with all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of various band steel S in data server 70 and the man-machine interface 73, the information that the band steel S that will record when described computing machine 60 puts in place passes to data server 70, data server 70 and man-machine interface 72 be determined to bit strip steel S all set shearing information line speed coupling of going forward side by side, various speed are in time assigned to each speed regulator 13,23,33 by industrial control network 81, PLC controller 71, fieldbus 82, realized the speed change shearing.
The above-mentioned control structure of apparatus of the present invention, tracker computing machine 60 can be finished the calculating of the complicated rate curve of all rolled pieces (maximum 36) completely and the result is assigned the controller to the PLC of lower floor by data server 70, finish information (steel grade, heat (batch) number, length and width, the thick and various shearing information) transmission of all rolled pieces completely by operation, arbitrary rolled piece begins to roll off the production line to finally cutting into finished product from the heating furnace charging roller, all operational factors, action command all controlling, make the PLC controller be able to the various parameters of correct execution.
Band steel shear effect.
According to table 1, mate as follows to band steel data and shear rate:
Table 1 shear rate parameter set-point
| Thickness specification (mm): | Nip main make speed (rev/min): | Acceleration time (s): | High speed shear master make speed (rev/min): |
| 8～10mm | 35 | 1 | 50 |
| 10～ |
30 | 1.2 | 48 |
| 16～20mm | 25 | 1.5 | 45 |
| 20～25mm | 18 | 1.5 | 40 |
Be respectively 10mm, 16mm, 20mm below with thickness, length is that the ideal format band steel of 40000m is an example, by shear time, sting the data contrast of the instantaneous operator dash current of steel, steel-fastening failure rate, the effect of speed change shearing of the present invention be described.
Thickness 10mm is with steel
| Project | The tradition constant speed is sheared | Speed change of the present invention is sheared |
| Shear rate | Biting speed: 40r/min shear rate: 40r/min | Biting speed: 35r/min shear rate: 50r/min |
| Shear time | 54s | 42s |
| Operator is stung steel drift and is hit electric current | 205％ | 182％ |
| The steel-fastening failure rate | 8％ | ≤1％ |
Thickness 16mm is with steel
| Project | The tradition constant speed is sheared | Speed change of the present invention is sheared |
| Shear rate | Biting speed: 35r/min shear rate: 35r/min | Biting speed: 30r/min shear rate: 48r/min |
| Shear time | 62s | 51s |
| Operator is stung steel drift and is hit electric current | 215％ | 196％ |
| The steel-fastening failure rate | 8％ | ≤1％ |
Thickness 20mm is with steel
| Project | The tradition constant speed is sheared | Speed change of the present invention is sheared |
| Shear rate | Biting speed: 30r/min shear rate: 30r/min | Biting speed: 25r/min shear rate: 45r/min |
| Shear time | 71s | 58s |
| Operator is stung steel drift and is hit electric current | 225％ | 205％ |
| The steel-fastening failure rate | 7％ | ≤1％ |
By last digital proof: the failure rate of control method of the present invention and shear reduces greatly, can guarantee the continuous production of stability and high efficiency, the apparatus for production line failure rate that causes significantly reduces by shearing, the stability of system significantly strengthens, and obvious technical effects, economic benefit and social benefit are very considerable.
Claims (10)
1, a kind of circle shear is sheared control method, described circle shear comprises the controller of entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, control device and output control command thereof, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, and described control device has been set up the speed regulator of following the tracks of tracker, each pinch roll and the main cutting edge of steel plate position; This control method comprises the steps:
A): the operation and the position of described tracker monitoring steel plate;
Does B): described tracker judge that steel plate head arrives the entrance pinch roll front portion? as be not judged as not, return steps A, as to be judged as be to forward step C to): described controller is that speed makes main body send shearing the biting speed order with the entrance pinch roll;
D): behind the step C, does described tracker judge that steel plate head arrives main cutting edge? as be judged as not, go back to step C, as be judged as and be, forward step e to): described controller is that speed makes main body, keeps the shearing biting speed constant with main cutting edge, simultaneously, the control entrance pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
F): after the step e, does described tracker judge that steel plate head arrives the outlet pinch roll? as be judged as not, go back to step e, as be judged as and be, forward step G to): described controller is that speed makes main body send the acceleration order with main cutting edge, control main cutting edge and quicken to reach the shear rate of high speed shear order in time second and keep high speed at 0.5-2, simultaneously, control outlet pinch roll is followed the linear velocity of main cutting edge and is kept synchronously;
H): behind the step G, does described tracker judge that the steel plate afterbody arrives between main cutting edge and the outlet pinch roll? as be judged as not, go back to step G, as be judged as and be, forward step I to): described controller is that speed makes main body and keeps its high-speed cruising state constant with the outlet pinch roll, simultaneously, stop main cutting edge and entrance pinch roll;
Does J): behind the step I, described tracker judge that the steel plate afterbody leaves the outlet pinch roll? as be not judged as not, go back to step I, as to be judged as be to forward step K to): described controller finishes the speed command of outlet pinch roll, and the material state for the treatment of is got back to by system.
2, circle shear is sheared control method according to claim 1, it is characterized in that: described tracker comprises computing machine, and also comprise the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, the speed data of described each tachogenerator of computer acquisition is carried out the run location that mathematical computations is followed the tracks of steel plate; When described tracker confirms that steel plate head arrives the perpendicular bisector position of pinch roll, described controller is controlled the top roll of this pinch roll from preparing highly to depress and carry out corresponding speed order, when described tracker confirmed that the steel plate afterbody arrives described pinch roll perpendicular bisector position, the top roll that described controller is controlled this pinch roll was lifted to the preparation height and stops corresponding speed order.
3, circle shear is sheared control method as claimed in claim 1 or 2, it is characterized in that: described control device also comprises the metal detector that is arranged on each pinch roll front portion, metal detector is surveyed steel plate, and described control device feeds back to the position of described tracker in order to calibration steel plate with detectable signal.
4, shear control method as circle shear as described in the claim 3, it is characterized in that: also comprise following operation B1 before the described step C): after the metal detection utensil of entrance pinch roll front portion detects the head of steel plate, the position correction before described controller cuts across the steel plate that puts in place; Also comprise following operation F1 before the described step G): after the metal detection utensil of outlet pinch roll front portion detects the head of steel plate, the position correction during described controller is sheared the steel plate that puts in place.
5, shear control method as circle shear as described in the claim 3, it is characterized in that: among the described step C, send when shearing the biting speed order, described controller is controlled main cutting edge and is followed the linear velocity of entrance pinch roll and keep synchronous; Among the described step B, described tracker verifies according to the signal of the metal detector of entrance pinch roll front portion whether steel plate head arrives the front portion of entrance pinch roll; In the described step F, described tracker verifies according to the signal of the metal detector of outlet pinch roll front portion whether steel plate head arrives the outlet pinch roll; Among the described step H, described tracker verifies according to the signal of the metal detector of outlet pinch roll front portion whether the steel plate afterbody arrives between main cutting edge and the outlet pinch roll.
6, circle shear is sheared control method according to claim 1, it is characterized in that: described controller comprises data server, the PLC controller of the shearing information of monitoring steel plate, the steel plate position that this data server records according to described tracker and all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of the steel plate that puts in place are carried out speeds match, and various speed are in time assigned to each speed regulator by described PLC controller, realize that speed change shears.
7, shear control method as circle shear as described in the claim 6, it is characterized in that: described tracker also comprises the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, the velocity amplitude that described controller also records each tachogenerator feeds back to data server and/or PLC controller, realizes the closed-loop control to each speed regulator.
8, a kind of control device of shearing control method as circle shear as described in one of claim 1-7 that adopts, it comprises the controller of exporting control command, described circle shear comprises entrance pinch roll, main cutting edge, outlet pinch roll, rollgang, described pinch roll comprises top roll, lower roll, described main cutting edge comprises lower scissor blade and upper scissor blade, it is characterized in that: described control device also comprises the speed regulator of tracker, each pinch roll and the main cutting edge of following the tracks of steel plate position; The steel plate position that described controller is determined according to described tracker sends corresponding speed command to each speed regulator in good time.
9, shear the control device of control method as circle shear as described in the claim 8, it is characterized in that: described control device also comprises the metal detector that is arranged on each pinch roll front portion, metal detector is surveyed steel plate, and described control device feeds back to the position of described tracker in order to calibration steel plate with detectable signal; Described tracker comprises computing machine, and also comprises the tachogenerator that is arranged on each pinch roll lower roll both sides and main cutting edge both sides, and the speed data of described each tachogenerator of computer acquisition is carried out the run location that mathematical computations is followed the tracks of steel plate.
10, shear the control device of control method as circle shear as described in the claim 8, it is characterized in that: described controller comprises data server, the PLC controller of the shearing information of monitoring steel plate, the steel plate position that this data server records according to described tracker and all shearing information (comprising steel grade, heat (batch) number, length and width, one-tenth-value thickness 1/10) of the steel plate that puts in place are carried out speeds match, and various speed are in time assigned to each speed regulator by described PLC controller, realize that speed change shears.
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| CN2008102177462A CN101441462B (en) | 2008-11-26 | 2008-11-26 | Shearing control method and control device of disc shear |
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| CN2008102177462A CN101441462B (en) | 2008-11-26 | 2008-11-26 | Shearing control method and control device of disc shear |
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| CN101441462B CN101441462B (en) | 2010-08-25 |
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| CN101716597B (en) * | 2009-12-15 | 2012-05-30 | 中冶南方（武汉）自动化有限公司 | Method for preventing broken pieces of band tail from blocking shearing when shearing band tail of cold rolled strip steel production unit |
| CN102773766A (en) * | 2011-05-12 | 2012-11-14 | 上海宝信软件股份有限公司 | Self-zeroing control method for cutting of flying shear |
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| CN102773766A (en) * | 2011-05-12 | 2012-11-14 | 上海宝信软件股份有限公司 | Self-zeroing control method for cutting of flying shear |
| CN103722230A (en) * | 2012-10-10 | 2014-04-16 | 北新集团建材股份有限公司 | Cutting-off method |
| CN103034199A (en) * | 2012-12-11 | 2013-04-10 | 济钢集团有限公司 | Control system and control method of bilateral scissors capable of fast shearing |
| CN104249187A (en) * | 2013-06-25 | 2014-12-31 | 宝山钢铁股份有限公司 | High-yield-strength oriented silicon steel shearing process |
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