CN111363911A - Quenching control system and method - Google Patents
Quenching control system and method Download PDFInfo
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- CN111363911A CN111363911A CN202010247512.3A CN202010247512A CN111363911A CN 111363911 A CN111363911 A CN 111363911A CN 202010247512 A CN202010247512 A CN 202010247512A CN 111363911 A CN111363911 A CN 111363911A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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Abstract
The invention discloses a quenching control system and a quenching control method. The system comprises: the system comprises a photoelectric sensor, a first pressure sensor, a digital pressure relay, a controller and an industrial personal computer; the controller is electrically connected with the photoelectric sensor and the first pressure sensor, and the controller is electrically connected with the industrial personal computer; the digital pressure relay is electrically connected with the first pressure sensor; the photoelectric sensor is used for detecting the size of the plate to be quenched; the controller is used for receiving the size of the plate to be quenched and sending the size to the industrial personal computer; the industrial personal computer is used for determining the target pressure head pressure according to the size of the plate to be quenched; the first pressure sensor is used for detecting the actual pressure head pressure of the press machine; the digital pressure relay is used for determining a pressure head pressure control signal according to the actual pressure head pressure and the target pressure head pressure, and controlling the operation of the hydraulic oil pump according to the pressure control signal so as to adjust the actual pressure head pressure to the target pressure head pressure. The method is convenient for adjusting the technological parameters of quenching, saves energy consumption and realizes high-precision control.
Description
Technical Field
The embodiment of the invention relates to the technical field of automation, in particular to a quenching control system and a quenching control method.
Background
The steel plate is a necessary part in the vehicle manufacturing industry, and the vehicle needs to be quenched before being assembled. Therefore, the steel plate quenching process is the most important link for obtaining the required performance of the steel plate material and is also the key link for obtaining the required function of the steel plate material. The super-cooled austenite is transformed into martensite or bainite through a quenching process to obtain a martensite or bainite structure, and then the rigidity, hardness, wear resistance, fatigue strength, toughness and the like of the steel plate are greatly improved by being matched with tempering at different temperatures, so that different use requirements of various mechanical parts and tools are met.
In the prior art, during quenching, after a hydraulic oil pump of a press machine is started, the oil pressure is higher and higher until the hydraulic oil pump works at full load, and at the moment, the actual pressure head pressure between an upper pressure head and a lower pressure head of the press machine is greater than the preset pressure set by a proportional overflow valve, so that the proportional overflow valve is controlled to start overflowing, the oil pressure is reduced, and the actual pressure head pressure is equal to the preset pressure. The preset pressure of the proportional overflow valve is determined by outputting 4-20mA analog quantity through the control board card of the proportional overflow valve, so that the control precision is low, and the preset pressure of the proportional overflow valve is difficult to change; in addition, the hydraulic oil pump works at full load in the whole process, so that the energy consumption is high.
Disclosure of Invention
The invention provides a quenching control system and a quenching control method, which are convenient for adjusting quenching technological parameters, save energy consumption and realize high-precision control.
In a first aspect, an embodiment of the present invention provides a quenching control system, including:
the system comprises a photoelectric sensor, a first pressure sensor, a digital pressure relay, a controller and an industrial personal computer; the controller is electrically connected with the photoelectric sensor and the first pressure sensor, and the controller is electrically connected with the industrial personal computer; the digital pressure relay is electrically connected with the first pressure sensor;
the photoelectric sensor is used for detecting the size of the plate to be quenched;
the controller is used for receiving the size of the plate to be quenched and sending the size to the industrial personal computer;
the industrial personal computer is used for determining the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
the first pressure sensor is used for detecting the actual pressure head pressure between an upper pressure head and a lower pressure head of the press machine;
and the digital pressure relay is used for determining a pressure head pressure control signal according to the actual pressure head pressure and the target pressure head pressure, and controlling the operation of the hydraulic oil pump according to the pressure control signal so as to adjust the actual pressure head pressure to the target pressure head pressure.
Optionally, the control system further comprises a displacement sensor; the displacement sensor is electrically connected with the controller;
the displacement sensor is used for detecting the actual displacement of the lower pressure head;
the industrial personal computer is used for determining the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
the controller is used for determining a displacement control signal according to the target displacement and the actual displacement and controlling the lower pressure head to move according to the displacement control signal so as to adjust the actual displacement of the lower pressure head to the target displacement.
Optionally, the control system further comprises a synchronous motor; the input end of the synchronous motor is connected with the oil outlet end of the oil pipe, and a plurality of output ends of the synchronous motor are correspondingly connected with the oil inlet ends of a plurality of hydraulic oil cylinders one by one; and the synchronous motor is used for controlling the pressure of all the hydraulic oil cylinders to be the same.
Optionally, the control system further comprises a second pressure sensor and a bleed valve; the second pressure sensor and the bleeding valve are both electrically connected with the controller;
the second pressure sensor is used for detecting the actual furnace pressure of the heating furnace;
the blow-off valve is arranged on the air pipeline and used for controlling the air flow and pressure participating in combustion at the burner;
the controller is used for determining a furnace pressure control signal according to the actual furnace pressure and the target furnace pressure, and controlling the opening of the bleeding valve according to the furnace pressure control signal so as to enable the actual furnace pressure to reach the target furnace pressure.
Optionally, the control system further comprises an intelligent temperature controller, a temperature sensor, an air regulating valve and a gas regulating valve; the temperature sensor is electrically connected with the intelligent temperature controller and the controller respectively; the intelligent temperature controller is electrically connected with the controller; the controller is electrically connected with the air regulating valve and the gas regulating valve respectively;
the industrial personal computer is also used for determining the target furnace temperature and the target heat preservation time in the heating furnace according to the size of the plate to be quenched;
the temperature sensor is used for detecting the actual furnace temperature in the heating furnace;
the intelligent temperature controller is used for calculating the combustion proportion of the burner according to the actual furnace temperature and the target furnace temperature;
the air regulating valve is arranged on the air pipeline, and the gas regulating valve is arranged on the gas pipeline; the air regulating valve and the gas regulating valve are used for controlling the combustion time at the burner;
the controller is used for calculating combustion time according to the combustion proportion, determining a temperature control signal according to the combustion time, and controlling the opening and closing of the air regulating valve and the gas regulating valve according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; and the temperature of the plate to be quenched is kept at the target furnace temperature until the actual heat preservation time reaches the target heat preservation time.
In a second aspect, an embodiment of the present invention provides a method for controlling quenching, including:
detecting the size of the plate to be quenched by a photoelectric sensor;
the controller receives the size of the plate to be quenched and sends the size to the industrial personal computer;
the industrial personal computer determines the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
the first pressure sensor detects the actual pressure head pressure between an upper pressure head and a lower pressure head of the press machine;
and the digital pressure relay determines a pressure head pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the pressure head pressure control signal so as to adjust the actual pressure head pressure to the target pressure head pressure.
Optionally, the control method further includes:
the industrial personal computer determines the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
a displacement sensor detects the actual displacement of the lower pressure head;
and the controller determines a displacement control signal according to the target displacement and the actual displacement and controls the lower pressure head to move according to the displacement control signal so as to adjust the actual displacement of the lower pressure head to the target displacement.
Optionally, the determining, by the digital pressure relay, a pressure control signal according to the target head pressure and the actual head pressure, and controlling the operation of the hydraulic oil pump according to the control signal, so that the adjusting of the actual head pressure to the target head pressure includes:
the digital pressure relay determines a pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the control signal;
the synchronous motor controls the pressure of all hydraulic oil cylinders to be the same.
Optionally, the control method further includes:
a second pressure sensor detects the actual furnace pressure of the heating furnace;
the controller determines a furnace pressure control signal according to the actual furnace pressure and the target furnace pressure, and controls the opening of a bleeding valve according to the furnace pressure control signal so as to enable the actual furnace pressure to reach the target furnace pressure; the bleeding valve is arranged on the air pipeline and used for controlling the air flow and the pressure of the burner participating in combustion.
Optionally, the control method further includes:
the industrial personal computer determines the target furnace temperature and the target heat preservation time of the heating furnace according to the size of the plate to be quenched;
the temperature sensor detects the actual furnace temperature of the heating furnace;
the intelligent temperature controller calculates the combustion proportion of the burner according to the actual furnace temperature and the target furnace temperature;
the controller calculates the combustion time according to the combustion proportion; determining a temperature control signal according to the combustion time, and controlling the opening and closing of an air regulating valve and a gas regulating valve according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; the air regulating valve is arranged on the air pipeline, and the gas regulating valve is arranged on the gas pipeline;
and the controller is used for preserving the heat of the plate to be quenched according to the temperature in the target furnace until the actual heat preservation time reaches the target heat preservation time.
According to the technical scheme provided by the embodiment of the invention, the size of a plate to be quenched is detected through a photoelectric sensor, the target pressure head pressure between an upper pressure head and a lower pressure head of a press machine is determined through an industrial personal computer, the actual pressure head pressure between the upper pressure head and the lower pressure head of the press machine is detected through a first pressure sensor, a digital pressure relay determines a pressure head pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of a hydraulic oil pump according to the pressure head pressure control signal, so that the actual pressure head pressure is adjusted to the target pressure head pressure. The preset value in the digital pressure relay can be flexibly set, so that the plate to be quenched can be conveniently set to different target pressure head pressures according to different sizes of the plate to be quenched, and quenching technological parameters can be conveniently adjusted; the digital pressure relay can control the operation of the hydraulic oil pump, and the operation of the hydraulic oil pump is controlled according to actual requirements in the whole quenching process, so that unnecessary energy waste is avoided, and energy consumption is saved; in addition, because the pressure head pressure control signal of the output of the digital pressure relay is a digital signal, the control precision is high, and the stability of the plate quality is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a quenching control system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a quenching process system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a press machine according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another quenching control system provided in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another quenching control system provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a heating furnace according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another quenching control system provided in an embodiment of the present invention;
fig. 8 is a schematic flow chart of a quenching control method according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of a quenching control method according to an embodiment of the present invention;
fig. 10 is a schematic flowchart of a quenching control method according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a quenching control system according to an embodiment of the present invention. As shown in fig. 1, the quenching control system 100 includes: a photoelectric sensor 110, a first pressure sensor 120, a digital pressure relay 130, a controller 140 and an industrial personal computer 150; the controller 140 is electrically connected with the photoelectric sensor 110 and the first pressure sensor 120, and the controller 140 is electrically connected with the industrial personal computer 150; the digital pressure relay 130 is electrically connected to the first pressure sensor 120;
the photoelectric sensor 110 is used for detecting the size of the plate to be quenched;
the controller 140 is used for receiving the size of the plate to be quenched and sending the size to the industrial personal computer 150;
the industrial personal computer 150 is used for determining the target pressure head pressure between the upper pressure head and the lower pressure head of the press machine according to the size of the plate to be quenched;
the first pressure sensor 120 is used for detecting the actual ram pressure between the upper ram and the lower ram of the press machine;
the digital pressure relay 130 is configured to determine a ram pressure control signal according to the actual ram pressure and the target ram pressure, and control the operation of the hydraulic oil pump according to the pressure control signal, so that the actual ram pressure is adjusted to the target ram pressure.
Specifically, fig. 2 is a schematic structural diagram of a quenching process system according to an embodiment of the present invention, and as shown in fig. 2, the quenching process system includes: the device comprises a feeding table 210, a heating furnace 220, a press machine 230, a discharging table 240, a transmission control system, a furnace pressure control system, a furnace temperature control system, a press machine pressure control system and a water spraying control system. The charging table 210 is provided with a photoelectric sensor 110, and the photoelectric sensor 110, the furnace pressure control system, the furnace temperature control system, the water spray control system and the transmission control system 250 are all electrically connected with the controller 140; the feeding table 210, the heating furnace 220, the press machine 230 and the discharging table 240 are all electrically connected with a transmission control system 250; the furnace pressure control system and the furnace temperature control system are both electrically connected with the heating furnace 220; the press machine pressure control system and the water spray control system are both electrically connected with the press machine 230, and the controller 140 is electrically connected with the industrial personal computer 150. The quenching process of a plate will be described as an example.
The transmission control system controls the plate to be quenched to be transmitted on the feeding table 210, the photoelectric sensor 110 detects the size of the plate to be quenched, the controller 140 receives the size of the plate to be quenched, the industrial personal computer 150 receives the size of the plate to be quenched transmitted by the controller 140, process parameters (including target pressure head pressure, target temperature in the furnace, target displacement, heat preservation time, number of spray heads, position of the spray heads and the like) are determined according to the size of the plate to be quenched, the transmission control system transmits the plate to be quenched into the heating furnace 220, the furnace pressure control system controls the actual pressure in the heating furnace 220 to reach the target pressure in the furnace, the furnace temperature control system controls the actual temperature in the heating furnace 220 to reach the target temperature in the furnace, after the heating and heat preservation are finished, the transmission control system transmits the plate to be quenched to the press bed 230, and the press bed pressure control system controls the actual pressure head pressure between an upper press head, the water spray control system controls a specific spray head to spray water to quench the plate to be quenched, after quenching is finished, the press pressure control system controls the plate to be quenched to descend to a certain position, and the transmission control system transmits the plate to be quenched to the blanking table 240.
Fig. 3 is a schematic structural diagram of a press machine according to an embodiment of the present invention, and as shown in fig. 3, the press machine includes an upper press head 231, a lower press head 232, a first pressure sensor 120, a hydraulic oil pump 233, a hydraulic oil cylinder 234, and an oil tank 235, the first pressure sensor 120 is disposed on the hydraulic oil cylinder 234, the digital pressure relay 130 is electrically connected to the first pressure sensor 120 and the hydraulic oil pump 233, an oil inlet end of the oil tank 235 is connected to an output end of the hydraulic oil pump 233, and an oil outlet end of the oil tank 235 is connected to an oil inlet end of the hydraulic oil cylinder 234. The first pressure sensor 120 is used for detecting the actual ram pressure between the upper ram 231 and the lower ram 232 of the press machine, the digital pressure relay 130 is used for controlling the operation of the hydraulic oil pump 233, the operation of the hydraulic oil pump 233 is the source power of the pressure generated by the hydraulic oil cylinder 234, and therefore the digital pressure relay 130 achieves the purpose of controlling the actual ram pressure between the upper ram 231 and the lower ram 232 of the press machine by controlling the operation of the hydraulic oil pump 233. The digital pressure relay 130 can set a preset value by itself, the preset value can be set by a digital setting key according to design requirements, and when the actual pressure head is smaller than the preset value, the hydraulic oil pump 233 operates until the actual pressure head is increased to the preset value; when the actual pressure of the ram is greater than the preset value, the operation of the hydraulic oil pump 233 is stopped, and the oil outlet end of the hydraulic oil pump 234 discharges oil until the actual pressure of the ram is reduced to the preset value. Therefore, setting the preset value as the target ram pressure enables adjustment of the actual ram pressure to the target ram pressure.
In the embodiment of the invention, the preset value of the digital pressure relay 130 can be flexibly set, and can be conveniently and flexibly set according to different target pressure head pressures, so that the quenching process parameters can be conveniently adjusted. The digital relay 130 controls the actual pressure head pressure by controlling the operation of the hydraulic oil pump 233, and can control the operation of the hydraulic oil pump 233 according to actual requirements in the whole quenching process, thereby avoiding unnecessary energy waste and saving energy consumption; in addition, the pressure head pressure control signal output by the digital relay 130 is a digital signal, so the control precision is higher, and the stability of the plate quality is ensured.
Optionally, fig. 4 is a schematic structural diagram of another quenching control system provided in the embodiment of the present invention. As shown in fig. 4, the control system 100 for quenching further includes a displacement sensor 160; the displacement sensor 160 is electrically connected to the controller 140;
the displacement sensor 160 is used for detecting the actual displacement of the lower pressure head;
the industrial personal computer 150 is used for determining the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
the controller 140 is configured to determine a displacement control signal according to the target displacement and the actual displacement, and control the movement of the lower ram according to the displacement control signal, so that the actual displacement of the lower ram is adjusted to the target displacement.
Specifically, referring to fig. 3 and 4, the displacement sensor 160 is disposed on the hydraulic cylinder 234, and the displacement sensor 160 is electrically connected to the controller 140, so that when determining the target displacement, the target ram pressure is considered, and the actual ram pressure between the upper ram 231 and the lower ram 232 of the press machine reaches the target ram pressure without generating an indentation on the surface of the plate. It should be noted that, when the actual ram pressure between the upper ram 231 and the lower ram 232 of the press machine does not reach the target ram pressure, but the actual displacement of the lower ram 232 reaches the target displacement, the control system still mainly controls the press machine pressure, and continues to lift the lower ram 232 until the actual ram pressure between the upper ram 231 and the lower ram 232 of the press machine reaches the target ram pressure, and if the problem occurs continuously, it is necessary to check whether the surface of the plate to be quenched is uneven, or check whether the control system has a problem, which is beneficial to quality screening of the plate material and troubleshooting of the control system itself.
Optionally, with continued reference to fig. 4, the quench control system 100 further includes a synchronous motor 170; the input end of the synchronous motor 170 is connected with the oil outlet end of the oil tank 235, and a plurality of output ends of the synchronous motor 170 are correspondingly connected with the oil inlet ends of the plurality of hydraulic oil cylinders 234 one by one; synchronous motor 170 is used to control the pressure to be the same for all hydraulic rams 234.
Specifically, with reference to fig. 3 and 4, the digital pressure relay 130 controls the hydraulic oil pump 233 to rotate, the rotation of the hydraulic oil pump 233 enables oil in the oil tank to generate oil pressure, the oil with the oil pressure enters the synchronous motor 170, the synchronous motor 170 evenly distributes the entered oil to the hydraulic oil cylinders 234, the pressure of the hydraulic oil cylinders 234 is the same, the actions of all the hydraulic oil cylinders 234 are the same, the uniform pressure of the plate to be quenched on the press can be ensured, and the plate quenching quality is improved.
Optionally, fig. 5 is a schematic structural diagram of another quenching control system according to an embodiment of the present invention. As shown in fig. 5, the control system 100 for quenching further includes a second pressure sensor 310 and a bleed valve 321; the second pressure sensor 310 and the bleed valve 321 are both electrically connected to the controller 140;
the second pressure sensor 310 is used for detecting the actual furnace pressure of the heating furnace;
the blow-off valve 321 is arranged on the air pipeline and is used for controlling the air flow and pressure participating in combustion at the burner 230;
the controller 140 is configured to determine a furnace internal pressure control signal according to the actual furnace internal pressure and the target furnace internal pressure, and control the opening of the bleeding valve 321 according to the furnace internal pressure control signal, so that the actual furnace internal pressure reaches the target furnace internal pressure.
Specifically, fig. 6 is a schematic structural diagram of a heating furnace according to an embodiment of the present invention. As shown in fig. 6, cold air is partially conveyed to the bleeding valve 321 through an air pipeline, partially conveyed to the air regulating valve 322, and gas is conveyed to the gas regulating valve 323 through a gas pipeline, air output by the air regulating valve 322 is heated at the burner 330, gas output by the gas regulating valve 323 is combusted in the atmosphere of hot air at the burner 330, flame formed by combustion is introduced into the heating furnace, and the temperature in the heating furnace is raised through radiation and air convection, and flue gas after heat exchange is discharged to the atmosphere through a flue. In the embodiment of the application, the cold air is transmitted through two air pipelines, one path of cold air is transmitted to the burner 330 through the air regulating valve 322, the other path of cold air is transmitted to the atmosphere through the bleeding valve 321, and the pressure and the flow of the two paths of cold air are mutually influenced, so that the air flow and the pressure participating in combustion at the burner 330 can be adjusted by adjusting the opening degree of the bleeding valve 321, and the purpose of adjusting the actual pressure in the furnace is achieved.
Optionally, fig. 7 is a schematic structural diagram of another quenching control system according to an embodiment of the present invention. As shown in fig. 7, the intelligent temperature controller 340, the temperature sensor 350, the air regulating valve 322 and the gas regulating valve 323 are further included; the temperature sensor 350 is electrically connected with the intelligent temperature controller 340 and the controller 140 respectively; the intelligent temperature controller 340 is electrically connected with the controller 140; the controller 140 is electrically connected with the air regulating valve 322 and the gas regulating valve 323 respectively;
the industrial personal computer 150 is also used for determining the target furnace temperature and the target heat preservation time in the heating furnace according to the size of the plate to be quenched;
the temperature sensor 350 is used for detecting an actual furnace temperature inside the heating furnace;
the intelligent temperature controller 340 is used for calculating the combustion proportion at the burner 330 according to the actual furnace temperature and the target furnace temperature;
the air regulating valve 322 is arranged on the air pipeline, and the gas regulating valve 323 is arranged on the gas pipeline; the air regulating valve and the gas regulating valve are used for controlling the combustion proportion at the burner 330;
the controller 140 is used for calculating the combustion time according to the combustion proportion, determining a temperature control signal according to the combustion time, and controlling the opening and closing of the air regulating valve 322 and the gas regulating valve 323 according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; and the method is also used for preserving the heat of the plate to be quenched according to the temperature in the target furnace until the actual heat preservation time reaches the target heat preservation time.
Specifically, with reference to fig. 6 and 7, the air output by the air adjustment valve 322 is heated at the burner 330, the gas output by the gas adjustment valve 323 is combusted in the atmosphere of hot air at the burner 330, the flame formed by the combustion is introduced into the heating furnace, and the temperature in the heating furnace is raised by radiation and air convection. The air flow of the burner 330 can be adjusted by adjusting the opening and closing of the air adjusting valve 322, the gas flow of the burner 330 can be adjusted by adjusting the opening and closing of the gas adjusting valve 323, the controller 140 calculates the combustion time of the burner 330 according to the combustion proportion of the burner 330, and controls the opening and closing of the air adjusting valve 322 and the gas adjusting valve 323 according to the combustion time, so that the purpose of adjusting the actual furnace temperature is achieved. The technical scheme is suitable for general situations, but when the difference between the actual furnace temperature and the target furnace temperature is greater than the threshold temperature difference, the air regulating valve 322 or the gas regulating valve 323 is considered to be possibly failed, so that the controller 140 directly closes the burner 330 to troubleshoot the failure, and system failure troubleshooting is facilitated.
Based on the same inventive concept, the embodiment of the invention also provides a quenching control method, which is applied to the quenching control system provided by any embodiment of the invention and has the corresponding functions and beneficial effects of the system.
Fig. 8 is a schematic flow chart of a quenching control method according to an embodiment of the present invention. As shown in fig. 8, the specific steps include:
810, detecting the size of the plate to be quenched by a photoelectric sensor;
820, receiving the size of the plate to be quenched by a controller and sending the size to an industrial personal computer;
830, the industrial personal computer determines the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
840, a first pressure sensor detects an actual ram pressure between an upper ram and a lower ram of the press machine;
850, the digital pressure relay determines a pressure head pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the pressure head pressure control signal, so that the actual pressure head pressure is adjusted to the target pressure head pressure.
In the embodiment of the invention, the preset value of the digital pressure relay can be conveniently and flexibly set according to different target pressure heads, so that the technological parameters of quenching can be conveniently adjusted. The actual pressure head pressure is controlled by controlling the operation of the hydraulic oil pump, and the operation of the hydraulic oil pump can be adjusted according to actual requirements in the whole quenching process, so that unnecessary energy waste is avoided, and energy consumption is saved; in addition, the pressure head pressure control signal output by the digital relay is a digital signal, so that the control precision is high, and the stability of the quality of the plate is ensured.
The optional control method further comprises:
the industrial personal computer determines the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
a displacement sensor detects the actual displacement of the lower pressure head;
and the controller determines a displacement control signal according to the target displacement and the actual displacement and controls the lower pressure head to move according to the displacement control signal so as to adjust the actual displacement of the lower pressure head to the target displacement.
Optionally, fig. 9 is a schematic flow chart of a quenching control method according to an embodiment of the present invention. As shown in fig. 9, the specific steps include:
810, detecting the size of the plate to be quenched by a photoelectric sensor;
820, receiving the size of the plate to be quenched by a controller and sending the size to an industrial personal computer;
830, the industrial personal computer determines the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
840, a first pressure sensor detects an actual ram pressure between an upper ram and a lower ram of the press machine;
851, determining a pressure control signal by the digital pressure relay according to the target pressure head pressure and the actual pressure head pressure, and controlling the operation of the hydraulic oil pump according to the control signal;
852, the synchronous motors control the pressure of all hydraulic cylinders to be the same.
Optionally, fig. 10 is a schematic flowchart of a quenching control method according to an embodiment of the present invention. As shown in fig. 10, the specific steps include:
910, detecting the size of the plate to be quenched by a photoelectric sensor;
920, receiving the size of the plate to be quenched by a controller and sending the size to an industrial personal computer;
930, determining the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine by the industrial personal computer according to the size of the plate to be quenched;
940, the second pressure sensor detects the actual furnace pressure of the heating furnace;
950, the controller determines a furnace pressure control signal according to the actual furnace pressure and the target furnace pressure, and controls the opening of a bleeding valve according to the furnace pressure control signal, so that the actual furnace pressure reaches the target furnace pressure; the bleeding valve is arranged on the air pipeline and used for controlling the air flow and pressure participating in combustion at the burner;
960, the first pressure sensor detects the actual pressure head pressure between the upper pressure head and the lower pressure head of the press machine;
970, the digital pressure relay determines a pressure head pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the pressure head pressure control signal, so that the actual pressure head pressure is adjusted to the target pressure head pressure.
Optionally, the control method shown in fig. 9 further includes:
the industrial personal computer determines the target furnace temperature and the target heat preservation time of the heating furnace according to the size of the plate to be quenched;
the temperature sensor detects the actual furnace temperature of the heating furnace;
the intelligent temperature controller calculates the combustion proportion of the burner according to the actual furnace temperature and the target furnace temperature;
the controller calculates the combustion time according to the combustion proportion; determining a temperature control signal according to the combustion time, and controlling the opening and closing of an air regulating valve and a gas regulating valve according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; the air regulating valve is arranged on the air pipeline, and the gas regulating valve is arranged on the gas pipeline;
and the controller is used for preserving the heat of the plate to be quenched according to the temperature in the target furnace until the actual heat preservation time reaches the target heat preservation time.
The quenching control method provided by the embodiment of the invention also has the beneficial effects of the quenching control system in the embodiment, and the details are not repeated here.
The foregoing is considered as illustrative of the preferred embodiments of the invention and technical principles employed. The present invention is not limited to the specific embodiments herein, and it will be apparent to those skilled in the art that various changes, rearrangements, and substitutions can be made without departing from the scope of the invention. Therefore, although the present invention has been described in more detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the claims.
Claims (10)
1. A control system for quenching, comprising:
the system comprises a photoelectric sensor, a first pressure sensor, a digital pressure relay, a controller and an industrial personal computer; the controller is electrically connected with the photoelectric sensor and the first pressure sensor, and the controller is electrically connected with the industrial personal computer; the digital pressure relay is electrically connected with the first pressure sensor;
the photoelectric sensor is used for detecting the size of the plate to be quenched;
the controller is used for receiving the size of the plate to be quenched and sending the size to the industrial personal computer;
the industrial personal computer is used for determining the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
the first pressure sensor is used for detecting the actual pressure head pressure between an upper pressure head and a lower pressure head of the press machine;
and the digital pressure relay is used for determining a pressure head pressure control signal according to the actual pressure head pressure and the target pressure head pressure, and controlling the operation of the hydraulic oil pump according to the pressure control signal so as to adjust the actual pressure head pressure to the target pressure head pressure.
2. The control system for quenching according to claim 1, further comprising a displacement sensor; the displacement sensor is electrically connected with the controller;
the displacement sensor is used for detecting the actual displacement of the lower pressure head;
the industrial personal computer is used for determining the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
the controller is used for determining a displacement control signal according to the target displacement and the actual displacement and controlling the lower pressure head to move according to the displacement control signal so as to adjust the actual displacement of the lower pressure head to the target displacement.
3. The control system for quenching according to claim 1, further comprising a synchronous motor;
the input end of the synchronous motor is connected with the oil outlet end of the oil tank, and a plurality of output ends of the synchronous motor are correspondingly connected with the oil inlet ends of a plurality of hydraulic oil cylinders one by one; and the synchronous motor is used for controlling the pressure of all the hydraulic oil cylinders to be the same.
4. The control system for quenching of claim 1, further comprising a second pressure sensor and a bleed valve; the second pressure sensor and the bleeding valve are both electrically connected with the controller;
the second pressure sensor is used for detecting the actual furnace pressure of the heating furnace;
the blow-off valve is arranged on the air pipeline and used for controlling the air flow and pressure participating in combustion at the burner;
the controller is used for determining a furnace pressure control signal according to the actual furnace pressure and the target furnace pressure, and controlling the opening of the bleeding valve according to the furnace pressure control signal so as to enable the actual furnace pressure to reach the target furnace pressure.
5. The quenching control system of claim 4, further comprising an intelligent temperature controller, a temperature sensor, an air regulating valve and a gas regulating valve; the temperature sensor is electrically connected with the intelligent temperature controller and the controller respectively; the intelligent temperature controller is electrically connected with the controller; the controller is electrically connected with the air regulating valve and the gas regulating valve respectively;
the industrial personal computer is also used for determining the target furnace temperature and the target heat preservation time in the heating furnace according to the size of the plate to be quenched;
the temperature sensor is used for detecting the actual furnace temperature in the heating furnace;
the intelligent temperature controller is used for calculating the combustion proportion of the burner according to the actual furnace temperature and the target furnace temperature;
the air regulating valve is arranged on the air pipeline, and the gas regulating valve is arranged on the gas pipeline; the air regulating valve and the gas regulating valve are used for controlling the combustion time at the burner;
the controller is used for calculating combustion time according to the combustion proportion, determining a temperature control signal according to the combustion time, and controlling the opening and closing of the air regulating valve and the gas regulating valve according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; and the temperature of the plate to be quenched is kept at the target furnace temperature until the actual heat preservation time reaches the target heat preservation time.
6. A method of controlling quenching, comprising:
detecting the size of the plate to be quenched by a photoelectric sensor;
the controller receives the size of the plate to be quenched and sends the size to the industrial personal computer;
the industrial personal computer determines the target pressure head pressure between an upper pressure head and a lower pressure head of the press machine according to the size of the plate to be quenched;
the first pressure sensor detects the actual pressure head pressure between an upper pressure head and a lower pressure head of the press machine;
and the digital pressure relay determines a pressure head pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the pressure head pressure control signal so as to adjust the actual pressure head pressure to the target pressure head pressure.
7. The method of controlling quenching according to claim 6, further comprising:
the industrial personal computer determines the target displacement of the lower pressure head according to the size of the plate to be quenched and the target pressure head pressure;
a displacement sensor detects the actual displacement of the lower pressure head;
and the controller determines a displacement control signal according to the target displacement and the actual displacement and controls the lower pressure head to move according to the displacement control signal so as to adjust the actual displacement of the lower pressure head to the target displacement.
8. The method of claim 6, wherein the digital pressure relay determining a pressure control signal according to the target ram pressure and the actual ram pressure, and controlling the operation of the hydraulic oil pump according to the control signal such that the actual ram pressure is adjusted to the target ram pressure comprises:
the digital pressure relay determines a pressure control signal according to the target pressure head pressure and the actual pressure head pressure, and controls the operation of the hydraulic oil pump according to the control signal;
the synchronous motor controls the pressure of all hydraulic oil cylinders to be the same.
9. The method of controlling quenching according to claim 6, further comprising:
a second pressure sensor detects the actual furnace pressure of the heating furnace;
the controller determines a furnace pressure control signal according to the actual furnace pressure and the target furnace pressure, and controls the opening of a bleeding valve according to the furnace pressure control signal so as to enable the actual furnace pressure to reach the target furnace pressure; the bleeding valve is arranged on the air pipeline and used for controlling the air flow and the pressure of the burner participating in combustion.
10. The method of controlling quenching according to claim 9, further comprising:
the industrial personal computer determines the target furnace temperature and the target heat preservation time of the heating furnace according to the size of the plate to be quenched;
the temperature sensor detects the actual furnace temperature of the heating furnace;
the intelligent temperature controller calculates the combustion proportion of the burner according to the actual furnace temperature and the target furnace temperature;
the controller calculates the combustion time according to the combustion proportion; determining a temperature control signal according to the combustion time, and controlling the opening and closing of an air regulating valve and a gas regulating valve according to the temperature control signal so as to enable the actual furnace temperature to reach the target furnace temperature; the air regulating valve is arranged on the air pipeline, and the gas regulating valve is arranged on the gas pipeline;
and the controller is used for preserving the heat of the plate to be quenched according to the temperature in the target furnace until the actual heat preservation time reaches the target heat preservation time.
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| CN202010247512.3A CN111363911A (en) | 2020-03-31 | 2020-03-31 | Quenching control system and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055714A (en) * | 2018-09-06 | 2018-12-21 | 中国兵器工业新技术推广研究所 | A kind of control system and method for quenching technical |
| CN210161656U (en) * | 2018-11-22 | 2020-03-20 | 大乘汽车有限公司 | Hydraulic cushion pressure monitoring system of hydraulic press |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055714A (en) * | 2018-09-06 | 2018-12-21 | 中国兵器工业新技术推广研究所 | A kind of control system and method for quenching technical |
| CN210161656U (en) * | 2018-11-22 | 2020-03-20 | 大乘汽车有限公司 | Hydraulic cushion pressure monitoring system of hydraulic press |
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Application publication date: 20200703 |