CN109709808B - Fuzzy control system and method for stroke of shearing oil cylinder of scrap steel shearing machine - Google Patents
Fuzzy control system and method for stroke of shearing oil cylinder of scrap steel shearing machine Download PDFInfo
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- CN109709808B CN109709808B CN201811632543.XA CN201811632543A CN109709808B CN 109709808 B CN109709808 B CN 109709808B CN 201811632543 A CN201811632543 A CN 201811632543A CN 109709808 B CN109709808 B CN 109709808B
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Abstract
The fuzzy control system and the fuzzy control method for the stroke of the shearing oil cylinder of the scrap steel shearing machine comprise a first displacement encoder arranged on a material pressing oil cylinder, a second displacement encoder arranged on the shearing oil cylinder, a pressure transmitter and a controller which are arranged on a hydraulic system of the scrap steel shearing machine; when the sheared material pushes the material to a set pushing advancing length and the material pressing oil cylinder starts to perform material pressing action, the controller reads the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system, analyzes and calculates the deformation variable coefficient of the sheared material according to the change speed condition of the position data and the pressure data, the position data and the pressure data when the material pressing oil cylinder finally stops, simulates the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advancing length, and automatically adjusts the position of the shearing oil cylinder, which needs to return, based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder.
Description
Technical Field
The invention relates to the technical field of scrap steel shears, in particular to a fuzzy control system and method for a stroke of a shearing oil cylinder of a scrap steel shear.
Background
The scrap steel shearing machine generally comprises a material pushing oil cylinder or a motor, a material pressing oil cylinder and a shearing oil cylinder, and the automatic shearing process of the shearing machine generally comprises a shearing return stroke, a material pressing return stroke, a material pushing forward step to a set length, a material pressing forward step, a shearing return stroke, a material pressing return stroke and a next cycle action of continuing the material pushing forward step. In the working process, the traditional return stroke modes of the shearing oil cylinder of the scrap steel shearing machine are generally two: firstly, the shearing oil cylinder directly returns to the uppermost limit position during return stroke; and secondly, controlling the shearing return stroke position by following the induction switching value signals of the material pressing oil cylinder and the shearing oil cylinder. Both of the above two controls have disadvantages: the first control mode is that the shearing oil cylinder returns to the uppermost limit position every time, so that the waste of time of invalid stroke cannot be reduced; the second control mode is characterized in that due to the limitation of multi-section switching value signal input, the position control of the shearing oil cylinder generates errors, the effective stroke of the shearing oil cylinder cannot be accurately controlled, and meanwhile, due to the fact that the pressure generated by the material pressing oil cylinder is different according to different material types, the deformation and the feeding length of metal materials are not considered, and the instability of equipment operation can be caused.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a fuzzy control system and a fuzzy control method for the stroke of a shearing oil cylinder of a scrap steel shearing machine.
The invention solves the technical problems through the following technical scheme:
the invention provides a stroke fuzzy control system of a shearing oil cylinder of a scrap steel shearing machine, which is characterized by comprising a first displacement encoder, a second displacement encoder, a pressure transmitter and a controller, wherein the first displacement encoder is arranged on a material pressing oil cylinder;
the first displacement encoder is used for monitoring and reading the real-time position of the material pressing oil cylinder;
the second displacement encoder is used for monitoring and reading the real-time position of the shearing oil cylinder;
the pressure transmitter is used for reading the pressure of the hydraulic system in real time;
the controller is used for reading the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system when the sheared material is pushed to a set pushing advance length and the material pressing oil cylinder starts to perform material pressing action, analyzing and calculating the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data and the position data and the pressure data when the material pressing oil cylinder finally stops, simulating the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advance length, and automatically adjusting the position of the shearing oil cylinder, which needs to return stroke, based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder.
Preferably, the position of the shearing cylinder needing return stroke is equal to the total stroke of the shearing cylinder minus the real-time height of the sheared material.
The invention also provides a fuzzy control method for the stroke of the shearing oil cylinder of the steel scrap shearing machine, which is realized by the system and comprises the following steps:
the first displacement encoder monitors and reads the real-time position of the material pressing oil cylinder, the second displacement encoder monitors and reads the real-time position of the shearing oil cylinder, and the pressure transmitter reads the pressure of the hydraulic system in real time;
when the sheared material pushes the material to a set pushing advancing length and the material pressing oil cylinder starts to perform material pressing action, the controller reads the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system, analyzes and calculates the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data and the position data and the pressure data when the material pressing oil cylinder finally stops, simulates the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advancing length, and automatically adjusts the position of the shearing oil cylinder, which needs to return stroke, based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder.
Preferably, the position of the shearing cylinder needing return stroke is equal to the total stroke of the shearing cylinder minus the real-time height of the sheared material.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
according to the invention, the return stroke action of the oil cylinder of the shearing machine is accurately controlled by considering variable fuzzy control of oil cylinder analog quantity position signals, material pressing pressure data, feeding length and the like, so that the return stroke time of the shearing cylinder of the scrap shearing machine is effectively reduced, the working efficiency of equipment is improved, and the stability of the equipment is ensured.
1. The real-time position of the sheared material is calculated through a fuzzy algorithm, the position of the shearing oil cylinder is accurately controlled, the idle stroke of the oil cylinder is shortened to the maximum extent, the working cycle time of equipment is shortened, and the working efficiency of the equipment is improved.
2. The position of the effective shearing opening is provided, and the stability of feeding is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a fuzzy control system for a shearing cylinder stroke of a scrap shearing machine according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the present embodiment provides a fuzzy control system for a shearing cylinder stroke of a scrap shearing machine, which includes a first displacement encoder 1 installed on a material pressing cylinder, a second displacement encoder 2 installed on the shearing cylinder, a pressure transmitter 3 installed on a hydraulic system of the scrap shearing machine, and a PLC 4.
The first displacement encoder 1 is used for monitoring and reading the real-time position of the material pressing oil cylinder; the second displacement encoder 2 is used for monitoring and reading the real-time position of the shearing oil cylinder; the pressure transmitter 3 is used for reading the pressure of the hydraulic system in real time.
The PLC4 is used for reading the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system when the sheared material is pushed to a set pushing advance length and the material pressing oil cylinder starts to perform material pressing action, analyzing and calculating the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data and the position data and the pressure data when the material pressing oil cylinder finally stops, simulating the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advance length, and automatically adjusting the position of the shearing oil cylinder needing return stroke based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder, namely the position of the shearing oil cylinder needing return stroke is equal to the position of the total stroke of the shearing oil cylinder minus the real-time height of the sheared material.
The embodiment also provides a fuzzy control method for the stroke of the shearing oil cylinder of the steel scrap shearing machine, which is realized by the system, and the method comprises the following steps:
the first displacement encoder monitors and reads the real-time position of the material pressing oil cylinder, the second displacement encoder monitors and reads the real-time position of the shearing oil cylinder, and the pressure transmitter reads the pressure of the hydraulic system in real time.
When the sheared material pushes the material to a set pushing advance length and the material pressing oil cylinder starts to perform material pressing action, the PLC reads the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system, analyzes and calculates the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data, the position data and the pressure data when the material pressing oil cylinder finally stops, simulates the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advance length, automatically adjusts the position of the shearing oil cylinder needing return stroke based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder, and the position of the shearing oil cylinder needing return stroke is equal to the position of the shearing oil cylinder minus the real-time height of the sheared material.
According to the invention, a fuzzy rule base is established according to the experience of an actual test, and the return stroke action of the oil cylinder of the shearing machine is accurately controlled by considering variable fuzzy control of oil cylinder analog quantity position signals, pressing pressure data, feeding length and the like, so that the return stroke time of the shearing cylinder of the scrap steel shearing machine is effectively reduced, the working efficiency of equipment is improved, and the stability of the equipment is ensured.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (2)
1. A stroke fuzzy control system of a shearing oil cylinder of a scrap steel shearing machine is characterized by comprising a first displacement encoder, a second displacement encoder, a pressure transmitter and a controller, wherein the first displacement encoder is arranged on a material pressing oil cylinder;
the first displacement encoder is used for monitoring and reading the real-time position of the material pressing oil cylinder;
the second displacement encoder is used for monitoring and reading the real-time position of the shearing oil cylinder;
the pressure transmitter is used for reading the pressure of the hydraulic system in real time;
the controller is used for reading the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system when the sheared material is pushed to a set pushing advance length and the material pressing oil cylinder starts to perform material pressing action, analyzing and calculating the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data and the position data and the pressure data when the material pressing oil cylinder finally stops, simulating the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advance length, and automatically adjusting the position of the shearing oil cylinder, which needs to return stroke, based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder;
the position of the shearing oil cylinder needing return stroke is equal to the total stroke of the shearing oil cylinder minus the real-time height of the sheared material.
2. A fuzzy control method for stroke of a shearing cylinder of a scrap steel shearing machine, which is characterized by comprising the system implementation according to claim 1, and the method comprises the following steps:
the first displacement encoder monitors and reads the real-time position of the material pressing oil cylinder, the second displacement encoder monitors and reads the real-time position of the shearing oil cylinder, and the pressure transmitter reads the pressure of the hydraulic system in real time;
when the sheared material pushes the material to a set pushing advancing length and the material pressing oil cylinder starts to perform material pressing action, the controller reads the real-time position of the material pressing oil cylinder and the pressure data of a hydraulic system, analyzes and calculates the deformation variable coefficient of the sheared material according to the read change speed condition of the position data and the pressure data and the position data and the pressure data when the material pressing oil cylinder finally stops, simulates the real-time height of the sheared material according to a fuzzy control algorithm based on the position data when the material pressing oil cylinder finally stops, the real-time position of the shearing oil cylinder, the deformation variable coefficient and the set pushing advancing length, and automatically adjusts the position of the shearing oil cylinder needing return stroke based on the real-time height of the sheared material and the total stroke of the shearing oil cylinder;
the position of the shearing oil cylinder needing return stroke is equal to the total stroke of the shearing oil cylinder minus the real-time height of the sheared material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103084411B (en) * | 2013-01-06 | 2015-08-05 | 北京中远通科技有限公司 | A kind of method and system realizing intermediate blank shearing property end to end |
| CN203610769U (en) * | 2013-12-09 | 2014-05-28 | 天津龙奕液压科技有限公司 | Full-automatic hydraulic gate shears |
| CN104842001B (en) * | 2015-04-10 | 2017-03-08 | 江苏大学 | A kind of ultra-large type plate shearing machine shear knife cutter gap automatic detection and adjustment system |
| CN204878132U (en) * | 2015-07-14 | 2015-12-16 | 湖北力帝机床股份有限公司 | Hydro -cylinder smooth starting and pressure relief device are expected with pressing to gate -type scrap shearing machine cylinder for shear |
| CN105172194B (en) * | 2015-09-30 | 2017-09-12 | 天津市天锻压力机有限公司 | The hydraulic pressure electrical-mechanical system of fuzzy speed control |
| CN205603937U (en) * | 2016-04-27 | 2016-09-28 | 句容市行香光明绣花厂 | Quick hydraulic pressure wire trimming device |
| CN105891018A (en) * | 2016-06-30 | 2016-08-24 | 四川水利职业技术学院 | Rock direct shear testing machine and shear box and testing system thereof |
| CN106019943A (en) * | 2016-07-02 | 2016-10-12 | 上海和鹰机电科技股份有限公司 | Fuzzy control method for intelligent shearing machine and control system thereof |
| US20180186358A1 (en) * | 2017-01-03 | 2018-07-05 | Dana Limited | Method For Control Of A Ball Planetary Type Continuously Variable Transmission Using Fuzzy Logic |
| CN106919054B (en) * | 2017-04-13 | 2023-07-21 | 中冶华天工程技术有限公司 | Bar flying shear shearing optimization control system and method based on machine vision |
| CN206960943U (en) * | 2017-08-02 | 2018-02-02 | 湖北力帝机床股份有限公司 | Gate-type cutting machine binder cylinder and shear cylinder laser ranging control device |
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