CN113746383A - Multi-blade longitudinal cutting curling and unwinding speed control method, system, equipment and storage medium - Google Patents
Multi-blade longitudinal cutting curling and unwinding speed control method, system, equipment and storage medium Download PDFInfo
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- CN113746383A CN113746383A CN202111303288.6A CN202111303288A CN113746383A CN 113746383 A CN113746383 A CN 113746383A CN 202111303288 A CN202111303288 A CN 202111303288A CN 113746383 A CN113746383 A CN 113746383A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
- H02P5/50—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing electrical values representing the speeds
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Power Engineering (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
The invention discloses a method, a system, equipment and a storage medium for controlling the curling and unwinding speed of multi-blade longitudinal cutting, wherein the control system is used for implementing the method and comprises the following steps: setting the voltage value of an input analog signal of the curled alternating-current frequency converter according to the rated frequency of the conducted alternating-current frequency converter by using a PLC (programmable logic controller); acquiring a direct current analog signal output by a curled alternating current frequency converter when the curled alternating current frequency converter actually operates according to a set input analog signal; and when the curled alternating-current frequency converter actually runs, the output direct-current analog signal is used as an input analog signal of the open alternating-current frequency converter to drive the open alternating-current frequency converter to run. The rotating motors of the leading-out alternating current frequency converter and the curling alternating current frequency converter are driven by one analog quantity output channel simultaneously, so that the linear speed matching between two driving rotating loads is realized, and the stretching of rubber products is avoided.
Description
Technical Field
The invention relates to the technical field of tire industry, in particular to a method, a system, equipment and a storage medium for controlling the curling and unwinding speed of multi-blade longitudinal cutting.
Background
Rubber products in the tire industry are main components of products, and a multi-blade longitudinal cutting device can cut a wide material roll into various material rolls with small sizes and widths, so that the rubber products can be conveniently used in other processes. In the production process, because the equipment needs to guide the rubber product which is wound into a roll again, and the rubber product is curled into a roll again after being cut, if the rated linear speeds of the curling roller and the guiding roller are inconsistent in the guiding and curling processes, the film can be stretched, the width and the thickness of the product are influenced, and the defective rate probability is high. Therefore, in order to improve the yield of the product, a method and a system for controlling the winding and unwinding speed of multi-blade longitudinal cutting are required.
Disclosure of Invention
Therefore, the invention aims to provide a method, a system, equipment and a storage medium for controlling the curling and unwinding speed of multi-blade longitudinal cutting, so as to realize accurate linear speed matching between two driving rollers.
In order to achieve the purpose, the method for controlling the curling and unwinding speed of the multi-blade longitudinal cutting comprises the following steps:
s1, setting the voltage value of the input analog signal of the curled alternating-current frequency converter according to the rated frequency of the leading-out alternating-current frequency converter by using the PLC;
s2, acquiring a direct current analog signal output by the curling alternating current frequency converter when the curling alternating current frequency converter actually runs according to the set voltage value of the input analog signal;
and S3, taking the output direct current analog signal as the input analog signal of the open alternating current frequency converter when the curling alternating current frequency converter actually operates, and driving the open alternating current frequency converter to operate.
More preferably, the rated frequency of the open ac frequency converter is set to 50HZ, and the linear speed reached by the open roller when the open ac frequency converter operates at the rated frequency is set as the upper limit of the linear speed of the whole line of the device.
Further, in S1, it is preferable that the voltage value of the input analog signal of the coiled ac inverter is set; the method comprises the following steps:
s101, when the guide-out alternating-current frequency converter drives the guide-out roller to operate at rated frequency, the linear speed of the guide-out roller is used as the upper limit value of the linear speed of the whole equipment line
(ii) a According to the ratio of the rated linear speed of the unwinding roller to the rated linear speed of the curling rollerIn relation to the above, the rated linear speed of the winding roller is set to
(ii) a Wherein N is a proportionality coefficient;
is the rated linear speed of the crimping roller,
the rated linear speed of the unwinding roller;
s103, converting the relation between the rated linear speed and the rotating speed of the curling roller according to the following formula:
(ii) a Wherein D is1Is the diameter of the crimping roller, n1The rotating speed of the crimping roller;
s104, according to the frequency of the curling alternating-current frequency converter, the rotating speed of the curling roller is in direct proportion; the voltage value of the input analog signal is in direct proportion to the frequency of the curled AC frequency converter, and the linear velocity of the whole line of the equipment is calculated to reach the upper limit value
Then, the maximum value of the actual operating frequency of the corresponding crimping roller is calculated according to the proportional relation set in the step S101, and the voltage value of the input analog signal of the crimping ac inverter is calculated based on the maximum value of the actual operating frequency of the crimping roller.
Further preferably, in S104, the linear velocity of the whole line of the equipment reaches the upper limit value according to the following formula
Maximum value of actual operating frequency of the corresponding crimping roller:
wherein, F1 upper limitFor the frequency of the crimping roller to reach a maximum，F2The rated rotating speed of the motor of the curling bearing and cutting roller is n to guide the actual operating frequency of the roller1The reduction ratio of the speed reducer is k1Diameter of the crimping roll is D1Then, then
(ii) a The rated rotating speed of the motor of the unwinding roller is n2The reduction ratio of the speed reducer is k2Diameter of the unwinding roller is D2Then, then
。
The invention also provides an apparatus comprising a processor and a memory, the memory for storing a computer program; the processor is used for realizing the steps of the multi-blade longitudinal cutting curling and unwinding speed control method when the computer program is executed.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the multi-blade rip-cutting curling and unwinding speed control method as described above.
Compared with the prior art, the multi-blade longitudinal cutting curling and unwinding speed control method, the multi-blade longitudinal cutting curling and unwinding speed control system, the multi-blade longitudinal cutting curling and unwinding speed control equipment and the storage medium have the following beneficial effects:
1. the utility model provides a control method and system, use the crimping alternating current converter of analog output channel control all the way in the PLC controller, when crimping alternating current converter driving motor is rotatory, the converter can be according to the actual frequency of current feedback, direct current analog signal of output of the analog output channel at crimping alternating current converter direct ratio equal proportion, this analog signal gives the analog input channel of signal input to the converter as the speed of leading away alternating current converter, drive leading away alternating current converter rotating electrical machines with this, the linear velocity matching between two initiative rotary load has been realized, the drawing to the rubber product has been avoided.
2. According to the control method and the control system, the diameter of the curled bearing and cutting roller is larger than that of the unwinding roller, the rated linear speed of the unwinding roller is used as the upper limit of the full linear speed of the equipment, and the phenomenon that the equipment breaks down and the normal use of the equipment is influenced due to mismatching of the linear speed is avoided.
3. Compared with the control method and the control system which utilize two paths of output of the PLC and respectively drive the leading-out frequency converter and the curling alternating-current frequency converter, the control method and the control system adopt one path of analog output channel, and the circuit structure is simple.
Drawings
FIG. 1 is a schematic flow chart of a multi-blade longitudinal-cutting curling and unwinding speed control method according to the present invention;
FIG. 2 is a schematic diagram showing the relative positions of the curling bearing and cutting roller and the unwinding roller on the multi-blade device;
FIG. 3 (a) is a schematic diagram of an arrangement of an analog quantity signal and a frequency converter before optimization;
FIG. 3 (b) is a schematic diagram of the arrangement of the optimized analog quantity signal and the frequency converter;
FIG. 4 is a diagram illustrating a ratio of an analog signal to a fundamental frequency of a frequency converter;
FIG. 5 is a schematic diagram showing the proportional relationship between the analog quantity signal of the curling AC frequency converter and the linear speed of the load of the curling bearing and cutting roller;
FIG. 6 is a schematic diagram showing the relationship between the frequency of the frequency converter and the linear velocity of the load;
in the figure:
1. material rolls; 2. a crimping roller; 3. and (4) unwinding the roller.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
As shown in fig. 1, in one aspect of the present invention, a method for controlling a multi-blade longitudinal curling and unwinding speed is provided; the method comprises the following steps:
s1, setting the voltage value of the input analog signal of the curled alternating-current frequency converter according to the rated frequency of the leading-out alternating-current frequency converter by using the PLC;
s2, acquiring a direct current analog signal output by the curling alternating current frequency converter when the curling alternating current frequency converter actually runs according to the set input analog signal;
and S3, taking the direct current analog signal output by the actual operation of the curling alternating current frequency converter as the input analog signal of the leading alternating current frequency converter, and driving the leading alternating current frequency converter to operate.
In S1, the rated frequency 50HZ of the ac inverter is derived as a reference frequency; when the leading-out alternating current frequency converter works at a rated frequency, the linear speed reached by the leading-out roller is used as the upper limit of the linear speed of the whole line of the equipment.
Further, when the input analog signal of the AC inverter is set, the voltage value of the input analog signal of the inverter is calculated to be equal to the voltage value of the output analog signal in an ideal state.
In a preferred embodiment, as shown in fig. 2, the method of setting the input analog signal of the coiled ac inverter according to the nominal frequency of the open ac inverter comprises:
by guiding the linear speed of the AC frequency converter when the frequency converter works according to the rated frequency
The upper limit of the linear velocity of the whole line of the equipment; then there are:
Wherein, V1 lineIs the rated linear speed of the crimping roller; v2 lineThe rated linear speed of the unwinding roller; n is a proportionality coefficient;
according to the relation between the linear speed and the rotating speed:
Wherein n is1The rotating speed of the crimping roller; n is2The rotating speed of the unwinding roller; d1Is the diameter of the curled shear roller; d2To lead off the diameter of the roll, and D1>D2。
Therefore, the above equation 2 can be modified into the following form:
；
similarly, equation 3 can be modified to the following form:
；
as shown in fig. 4 to 6, the frequency of the curling ac inverter is proportional to the rotation speed of the curling roller;
thus, equation 2 after deformation is equivalent to
；
Similarly, the formula 3 after deformation is equivalent to
；
Wherein the content of the first and second substances,
in order to achieve the frequency of the crimping roller during actual operation,
unwinding the roll frequency for actual operation; d1Is the diameter of the curled shear roller; d2To lead off the diameter of the roll, and D1>D2；
Since the frequency is set to be larger as the voltage value of the input analog signal is larger, according to the fact that the voltage value of the input analog signal is proportional to the frequency of the curling alternating-current frequency converter, the voltage value of the input analog signal of the curling alternating-current frequency converter can be equivalent to: setting according to the relation between the frequency and the linear speed, but the linear speed of the all-line equipment is a fixed value, so that the maximum value of the frequency of the unwinding roller is used as the maximum value of the frequency of the unwinding roller when the unwinding roller is actually operated, the actual operating frequency of the curling roller is deduced, and the output analog signal of the frequency converter is obtained according to the actual operating frequency of the curling roller; and obtaining the input analog signal of the frequency converter according to the fact that the output analog signal of the frequency converter is equal to the input analog signal.
Because the input analog signal of the unwinding roller frequency converter is equal to the output analog signal of the curling alternating current frequency converter; according to the input and output characteristics of the frequency converter, the voltage of the input analog signal is equal to the voltage of the output analog signal; the voltage value of the same frequency converter is equal to the proportional coefficient of the frequency; thus, the voltage U of the input analog signal of the lead-off roll frequency converter1Input analog signal U equal to curly AC frequency converter2When it is, then there are
Wherein, F1For the actual operating crimp roll frequency, F2The frequency of the unwinding roller during actual operation; the diameter of the crimping roller is D1(ii) a Diameter of the unwinding roller is D2；
When the actual running frequency of the unwinding roller is the rated frequency
=50HZ, according to the speed limit of the full-line plant set in equation 1,
(ii) a At this time, the frequency of the crimping roller reaches the upper limit value F1 upper limit(ii) a According to the proportional relation of formula 1, the frequency value meeting the requirement that the whole equipment runs at a uniform speed is obtained.
Wherein, F1 upper limitThe rated rotation speed of the motor of the curling bearing and cutting roller is n for the frequency of the curling roller to reach the upper limit value1The reduction ratio of the speed reducer is k1Diameter of the crimping roll is D1Then, then
(ii) a The rated rotating speed of the motor of the unwinding roller is n2The reduction ratio of the speed reducer is k2Diameter of the unwinding roller is D2Then, then
In one embodiment, assume a nominal linear speed of the crimping roller of V1 line=40 m/min; the rated linear speed of the unwinding roller is V2 line=30m/min；V2 line/V1 line=3/4, i.e. N = 3/4.
Because the rated linear speed is the linear speed when working according to the rated frequency; therefore, the nominal frequency of the unwinding roller at this time reaches 50 HZ; i.e. F2=50 HZ. In order to meet the requirement of equal all-line speed, the frequency value of the crimping roller needs to be reduced proportionally according to the proportional relation met by the rated linear speed, and the frequency value is used as the actual frequency value of the crimping roller in the actual operation according to the all-line uniform linear speed. Therefore, the maximum value F that the frequency of the crimping roller reaches at this time1 upper limit=NF2=37.5 HZ. That is, when the frequency is used, the linear speed of the curling roller is consistent with that of the unwinding roller and is 30 m/min. In actual operation, because the linear velocity measurement error is large, when the upper limit value of the frequency of the crimping roller is set, each electrical parameter can be set according to the formula 5.
Therefore, when the fundamental frequency of the frequency converter is led to change, the corresponding parameters of the curled alternating-current frequency converter are modified into the result deduced by the above formula according to the fundamental frequency modification parameters corresponding to the frequency converter.
According to the actual operating frequency of the frequency converter obtained by calculation, when the equivalent voltage value of the input analog signal is correspondingly calculated according to the actual operating frequency, the following method can be adopted:
acquiring the actual operating frequency of the conventional frequency converter and the voltage value of the input analog signal according to the proportional relation between the analog quantity signal and the fundamental frequency of the frequency converter shown in fig. 4; and (3) performing curve fitting by using EXCEL, selecting a curve with the fitting degree closest to 1 according to the curve obtained by fitting, and selecting a fitting relational expression.
Therefore, according to the rated frequency of the unwinding roller, the actual operating frequency of the crimping roller is calculated according to the formula 5; i.e. the actual operating frequency of the frequency converter. And according to the fact that the voltage of the input analog signal of the frequency converter is equal to the voltage of the output analog signal, inputting the actual operating frequency of the frequency converter into a direct proportion relation between the actual operating frequency of the frequency converter obtained through fitting and the voltage value of the input analog signal, and calculating to obtain the voltage value of the input analog signal.
Unlike the conventional connection mode of the control system shown in fig. 3 (a), the invention also provides a multi-blade longitudinal cutting curling and unwinding speed control system shown in fig. 3 (b), which is used for implementing the control method and comprises a PLC (programmable logic controller), a curling alternating-current frequency converter, an unwinding roller and a curling roller.
The PLC is used for acquiring the rated frequency of the unwinding AC frequency converter and setting the voltage value of an input analog signal of the curling AC frequency converter according to the linear speed of the unwinding roller rotating according to the rated frequency;
the curling alternating-current frequency converter is used for equivalently outputting the voltage value of the direct-current analog signal according to the voltage value of the input analog signal; driving the crimping roller to rotate by using the voltage value of the direct current analog signal;
and the unwinding alternating current frequency converter is used for acquiring the voltage value of the output direct current analog signal when the curling alternating current frequency converter actually operates according to the set input analog signal and driving the unwinding roller to rotate.
In one embodiment of the present application, the rated frequency of the leading-out ac frequency converter is set to 50HZ, and the linear speed reached when the leading-out ac frequency converter operates at the rated frequency is taken as the upper limit of the linear speed of the whole line of the device.
Preferably, the linear velocity of the whole line of the equipment reaches the upper limit value V according to the following formula2 lineMaximum value of actual operating frequency of the corresponding crimping roller:
Wherein, F1 upper limitThe rated rotation speed of the motor of the curling bearing and cutting roller is n for the frequency of the curling roller to reach the upper limit value1The reduction ratio of the speed reducer is k1Diameter of the crimping roll is D1Then, then
(ii) a The rated rotating speed of the motor of the unwinding roller is n2The reduction ratio of the speed reducer is k2Diameter of the unwinding roller is D2，
。
The invention also provides an apparatus comprising a processor and a memory, the memory for storing a computer program; the processor is used for realizing the steps of the multi-blade longitudinal cutting curling and unwinding speed control method when executing the computer program.
The invention also provides a storage medium, wherein the storage medium is stored with a computer program, and the computer program is executed by a processor to realize the steps of the multi-blade longitudinal cutting curling and unwinding speed control method.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A multi-blade longitudinal cutting curling and unwinding speed control method is characterized by comprising the following steps:
s1, setting the voltage value of the input analog signal of the curled alternating-current frequency converter according to the rated frequency of the leading-out alternating-current frequency converter by using the PLC;
s2, acquiring a direct current analog signal output by the curling alternating current frequency converter when the curling alternating current frequency converter actually runs according to the set voltage value of the input analog signal;
and S3, taking the output direct current analog signal as the input analog signal of the open alternating current frequency converter when the curling alternating current frequency converter actually operates, and driving the open alternating current frequency converter to operate.
2. The method as claimed in claim 1, wherein the nominal frequency of the unwinding ac inverter is set to 50HZ, and the linear speed reached by the unwinding roller when the unwinding ac inverter operates at the nominal frequency is used as the upper limit of the linear speed of the whole line of the device.
3. The method as claimed in claim 2, wherein in S1, the voltage value of the input analog signal of the crimp ac inverter is set; the method comprises the following steps:
s101, when the guide-out alternating-current frequency converter drives the guide-out roller to operate at rated frequency, the linear speed of the guide-out roller is used as the upper limit value of the linear speed of the whole equipment line
(ii) a Setting the rated linear speed of the curling roll to be
(ii) a Wherein N is a proportionality coefficient;
is the rated linear speed of the crimping roller,
for rating of unwinding rollersLinear velocity;
s103, converting the relation between the rated linear speed and the rotating speed of the curling roller according to the following formula:
(ii) a Wherein D is1Is the diameter of the crimping roller, n1The rotating speed of the crimping roller;
s104, according to the frequency of the curling alternating-current frequency converter, the rotating speed of the curling roller is in direct proportion; the voltage value of the input analog signal is in direct proportion to the frequency of the curled AC frequency converter, and the linear velocity of the whole line of the equipment is calculated to reach the upper limit value
Then, the maximum value of the actual operating frequency of the corresponding crimping roller is calculated according to the proportional relation set in the step S101, and the voltage value of the input analog signal of the crimping ac inverter is calculated based on the maximum value of the actual operating frequency of the crimping roller.
4. The method for controlling the curling and unwinding speed in multi-blade longitudinal cutting according to claim 3, wherein the calculation at S104 is performed according to the following formula when the linear speed of the whole line of the apparatus reaches the upper limit value
Maximum value of actual operating frequency of the corresponding crimping roller:
wherein, F1 upper limitIn order for the frequency of the crimping roller to reach a maximum value, F2The rated rotating speed of the motor of the curling bearing and cutting roller is n to guide the actual operating frequency of the roller1The reduction ratio of the speed reducer is k1Diameter of the crimping roll is D1Then, then
(ii) a The rated rotating speed of the motor of the unwinding roller is n2The reduction ratio of the speed reducer is k2Diameter of the unwinding roller is D2Then, then
。
5. The method of claim 4, wherein calculating the voltage value of the input analog signal of the curling ac inverter according to the maximum value of the actual operating frequency of the curling roller, comprises the steps of:
the method comprises the steps of collecting the maximum value of the actual operating frequency of the conventional curling alternating-current frequency converter and the voltage value of an input analog signal, carrying out curve fitting, obtaining a direct proportional relation between the actual operating frequency of the curling alternating-current frequency converter and the voltage value of the input analog signal according to an obtained fitting curve, and inputting the maximum value of the actual operating frequency of the curling roller collected in real time into the direct proportional relation to obtain the voltage value of the input analog signal.
6. A multi-blade longitudinal cutting curling and unwinding speed control system for implementing the control method of any one of the claims 1 to 5, which is characterized by comprising a PLC controller, a curling alternating-current frequency converter, an unwinding roller and a curling roller;
the PLC controller sets the voltage value of an input analog signal of the curling alternating-current frequency converter according to the linear speed of the unwinding roller when the unwinding roller rotates at the rated frequency;
the curling alternating-current frequency converter is used for equivalently outputting the voltage value of the direct-current analog signal according to the voltage value of the input analog signal; driving the crimping roller to rotate by using the output direct current analog signal;
and the unwinding alternating current frequency converter is used for acquiring the voltage value of the output direct current analog signal when the curling alternating current frequency converter actually operates according to the set input analog signal and driving the unwinding roller to rotate.
7. The system of claim 6, wherein the nominal frequency of the leading ac inverter is set to 50HZ, and the linear speed reached when the leading ac inverter operates at the nominal frequency is taken as the upper limit of the linear speed of the whole line of the apparatus.
8. The system of claim 7, further comprising calculating the upper limit of the linear speed of the entire machine line according to the following formula
Maximum value of actual operating frequency of the corresponding crimping roller:
wherein, F1 upper limitIn order for the frequency of the crimping roller to reach a maximum value, F2The rated rotating speed of the motor of the curling bearing and cutting roller is n to guide the actual operating frequency of the roller1The reduction ratio of the speed reducer is k1Diameter of the crimping roll is D1Then, then
(ii) a The rated rotating speed of the motor of the unwinding roller is n2The reduction ratio of the speed reducer is k2Diameter of the unwinding roller is D2Then, then
。
9. An apparatus comprising a processor and a memory, the memory configured to store a computer program; the processor, when executing the computer program, implements the steps of the method for controlling the multi-blade slitting curling and unwinding speed as claimed in any one of claims 1 to 5.
10. A storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method for controlling the speed of multi-slitting crimping and unwinding as claimed in any one of claims 1 to 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114237037A (en) * | 2022-02-24 | 2022-03-25 | 天津赛象科技股份有限公司 | Leading-out speed control method and system based on proximity switch detection |
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| CN106142616A (en) * | 2016-08-24 | 2016-11-23 | 天津赛象科技股份有限公司 | Automatically material-changing device |
| CN112987809A (en) * | 2021-02-05 | 2021-06-18 | 麒盛科技股份有限公司 | Variable-frequency speed regulation control method and system capable of regulating speed conveniently |
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| CN114237037A (en) * | 2022-02-24 | 2022-03-25 | 天津赛象科技股份有限公司 | Leading-out speed control method and system based on proximity switch detection |
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Application publication date: 20211203 Assignee: Tianjin Qingchuan Technology Co.,Ltd. Assignor: Tianjin Saixiang Technology Co.,Ltd. Contract record no.: X2022120000028 Denomination of invention: Method, system, equipment and storage medium for controlling crimping and opening speed of multi cutter longitudinal cutting Granted publication date: 20220215 License type: Common License Record date: 20220516 |