CN102069271A - Arc voltage raising control system for machines and control method thereof - Google Patents
Arc voltage raising control system for machines and control method thereof Download PDFInfo
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- CN102069271A CN102069271A CN2010105952120A CN201010595212A CN102069271A CN 102069271 A CN102069271 A CN 102069271A CN 2010105952120 A CN2010105952120 A CN 2010105952120A CN 201010595212 A CN201010595212 A CN 201010595212A CN 102069271 A CN102069271 A CN 102069271A
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Abstract
The invention provides an arc voltage raising control system for machines and a control method thereof. The control system comprises an industrial computer, a programmable logic controller, a servo driving device, an isolation converter and a plasma power supply, wherein the programmable logic controller is used as a core of the control system and is connected with the industrial computer, the servo driving device and the isolation converter respectively, and the plasma power supply is electrically connected with the isolation converter; and the control system further comprises a proximity positioning sensor which is directly connected with the programmable logic controller, the industrial computer is used for outputting cutting parameter signals to the programmable logic controller, the isolation converter is used for outputting acquired voltage conversion signals to the programmable logic controller, and the programmable logic controller is used for emitting command to the servo driving device according to the acquired information. The control system has stable performance and has the advantages of automatic initial positioning, collision avoidance, arc voltage intelligent regulation and the like.
Description
Technical field
The invention belongs to the CNC plasma cutting field, relate in particular to control system and the control method thereof that accurately to adjust CUT cutting head and cutting material distance under the cutting operating mode.
Background technology
In field of machining and machinebuilding technology, often relate to the cutting work of a lot of sheet metals, as to carbon steel, stainless steel, copper, aluminium etc. need cutting, and people often use plasma cutting, especially for stainless steel, copper, the cutting of aluminium.The plasma cutting is in the cutting above-mentioned material, can produce very dazzling arc light, operating personnel can't see the distance between plasma cutting head and the cutting material clearly, the cutting speed of CUT is very fast in addition, adding it is a kind of thermal cutting, be easy to make the material temperature distortion of cutting during cutting, manually can not the fast reaction utilization manually rise and descend and determine distance between plasma cutting head and the cutting material, the distance of plasma cutting head and cutting material is excessive, can cause cutting unsuccessful, and then needing cutting again, this not only loses time and electric energy, and secondary cut can cause the non-constant of cut quality; Distance between plasma cutting head and the cutting material is too small, and the quality of cutting is also bad, and the plasma cutting head is damaged, and when serious even can't work, the user has to change plasma cutting machines, causes cutting cost too high.
At present, can heighten controller by the plasma arc voltage controls torch height, the plasma arc voltage height controller utilizes the characteristic of some plasma power supply constant current or basic constant current, in cutting process, cutting current with set electric current compare change less, and the arc voltage of cutting is followed the variable in distance of cutting torch and sheet material and is changed under certain speed, when the distance of cutting torch and sheet material increases, arc voltage rises, when the distance of cutting torch and steel plate reduces, arc voltage descends, the principle that arc voltage is heightened controller is exactly by detecting the variation of arc voltage, lifting motor by the control cutting torch is controlled the distance of cutting torch and sheet material, and arc voltage is remained unchanged, and the height while of cutting torch also remains unchanged.But the plasma arc voltage height controller is an autonomous device at present, is not easy to the joint development of whole digital control system, and complicated operation, the price height.
Summary of the invention
At above-mentioned plasma arc voltage height controller deficiency in actual applications, the invention provides a kind of machine arc voltage Height-Adjusting System, this control system stable performance, have automatic initial alignment, arc voltage detects relatively, driven by servomotor, crashproof, advantages such as arc voltage intelligence adjusting.
Another object of the present invention provides the control method of a kind of described machine with the arc voltage Height-Adjusting System.This method is convenient to the The whole control system joint development, and availability is strong, applied range, and cost is low.
Above-mentioned machine comprises industrial computer (IPC) with the arc voltage Height-Adjusting System, programmable logic controller (PLC) (PLC), servo drive, isolated converter and plasma power supply, wherein, programmable logic controller (PLC) respectively with industrial computer, servo drive is connected with isolated converter, plasma power supply is electrically connected with isolated converter, industrial computer output cutting parameter signal is to programmable logic controller (PLC), the voltage transformation signal that isolated converter output collects is to programmable logic controller (PLC), and programmable logic controller (PLC) then sends instruction according to the information of being gathered and gives servo drive.Wherein, industrial computer is used for the cutting parameter setting; Isolated converter is used for the voltage that can gather for the PLC module the voltage transformation between cutting head and sheet material; Servo drive is used for the driving device platform, the rising of realization cutting head, decline, automatic adjusting etc.; Comprise also that near alignment sensor it directly is connected with programmable logic controller (PLC) (PLC), is used to feed back spacing approach signal, the main defencive function of realizing cutting head.
Described spacing approach signal; be that three proximity transducers installing between cutting head anchor clamps and cutting machine vertical axis are caught; when cutting head collides sheet material; the proximity transducer effect; drive servo drive behind the PLC detection signal immediately; regulate the cutting head height, realize the defencive function of cutting head.
It is that this control system also comprises the touch-screen that is connected with industrial computer (IPC) that above-mentioned control system is further improved, the touch-screen type human-computer interaction interface can make the input hommization more of parameter, more convenient and quicker realizes the input and the setting of cutting parameter with industrial computer (IPC).Operation has arc voltage and heightens the numerical control software that parameter is provided with on the industrial computer, and it mainly is cutting current and cutting material etc. in the cutting process to be set with the different and different parameter of cuts sheet material that parameter is provided with.
Further improvement to above-mentioned control system is that industrial computer (IPC) is to be connected with programmable logic controller (PLC) (PLC) by the RS232 interface.
Above-mentioned servo drive comprises servo-driver and servomotor.Servomotor can be the servomotor of band Position Control.
Above-mentioned industrial computer (IPC) can be the industrial computer of normal tape serial port function.
Above-mentioned programmable logic controller (PLC) (PLC) can be the PLC that Ai Mo gives birth to EC20 series.
Described machine is realized by following steps with the control method of arc voltage Height-Adjusting System:
The first, by touch-screen in the enterprising line parameter setting of industrial computer;
The second, parameter is set is passed among the PLC by industrial computer;
The 3rd, the voltage signal in the cutting process between cutting head and sheet material is passed to the CH1 port of the analog input module of PLC through behind the isolated variable of isolated converter;
The 4th, PLC is according to the analog-to-digital signal of analog input module, in conjunction with the parameter that is provided with in the above-mentioned first step, drive the motion of servo-driver and servomotor by digital input and output modules, when voltage rises, drive motors drives cutting head and descends, and when voltage descended, drive motors drove cutting head and rises.
In above-mentioned second step parameter being set can be passed among the PLC through the Modbus bus by RS232 by industrial computer.
In above-mentioned the 3rd step in the cutting process voltage signal between cutting head and sheet material can isolated variable through the isolated converter of 100:1 after, be passed to the CH1 port of the analog input module of PLC.
Can add be connected with PLC near alignment sensor, it is passed to PLC with signal in cutting in position fixing process, and cutting head is played a protective role.
Above-mentioned is that 3 proximity transducers that are mutually 120 degree angles are formed near alignment sensor.
Stable performance of the present invention has automatic initial alignment, and arc voltage detects relatively, and driven by servomotor is crashproof, advantages such as arc voltage intelligence adjusting; Be convenient to The whole control system and develop jointly, availability is strong, applied range, and cost is low.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a PLC wiring diagram of the present invention;
Fig. 3 is a cutting head lifting schematic diagram of the present invention.
The specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the present invention includes industrial computer 1, programmable logic controller (PLC) 2, servo drive 3, isolated converter 4 and plasma power supply 5, wherein, programmable logic controller (PLC) 2 respectively with industrial computer 1, servo drive 3 is connected with isolated converter 4, plasma power supply 5 is electrically connected with isolated converter 4, industrial computer 1 output cutting parameter signal is to programmable logic controller (PLC) 2, the voltage transformation signal that isolated converter 4 outputs collect is to programmable logic controller (PLC) 2, and 2 of programmable logic controller (PLC)s send instruction according to the information of being gathered and give servo drive 3.Wherein, industrial computer is used for the cutting parameter setting; Isolated converter is used for the voltage that can gather for the PLC module the voltage transformation between cutting head and sheet material; Servo drive is used for the driving device platform, the rising of realization cutting head, decline, automatic adjusting etc.; Programmable logic controller (PLC) (PLC) is connected with isolated converter with industrial computer (IPC), servo drive respectively as the core of control system, and plasma power supply is electrically connected with isolated converter; Comprise also that near alignment sensor 6 it directly is connected with programmable logic controller (PLC) (PLC), is used to feed back spacing approach signal, the main defencive function of realizing cutting head.
Described spacing approach signal; be that three proximity transducers installing between cutting head anchor clamps and cutting machine vertical axis are caught; when cutting head collides sheet material; the proximity transducer effect; drive servo drive behind the PLC detection signal immediately; regulate the cutting head height, realize the defencive function of cutting head.
It is that this control system also comprises the touch-screen 7 that is connected with industrial computer (IPC) that above-mentioned control system is further improved, the touch-screen type human-computer interaction interface can make the input hommization more of parameter, more convenient and quicker realizes the input and the setting of cutting parameter with industrial computer (IPC).Operation has arc voltage and heightens the numerical control software that parameter is provided with on the industrial computer, and it mainly is cutting current and cutting material etc. in the cutting process to be set with the different and different parameter of cuts sheet material that parameter is provided with.
Further improvement to above-mentioned control system is that industrial computer (IPC) is to be connected with programmable logic controller (PLC) (PLC) by the RS232 interface.
Above-mentioned servo drive 3 comprises servo-driver 8 and servomotor 9.Servomotor 9 can be the servomotor of band Position Control.
Above-mentioned industrial computer (IPC) can be the industrial computer of normal tape serial port function.
Above-mentioned programmable logic controller (PLC) (PLC) can be the PLC that Ai Mo gives birth to EC20 series.
The control method of adjusting the cutting head height based on arc voltage realizes by following steps:
The first, by touch-screen in the enterprising line parameter setting of industrial computer;
The second, parameter is set is passed among the PLC by industrial computer;
The 3rd, the voltage signal in the cutting process between cutting head and sheet material is passed to the CH1 port of the analog input module of PLC through behind the isolated variable of isolated converter;
The 4th, PLC is according to the analog-to-digital signal of analog input module, in conjunction with the parameter that is provided with in the above-mentioned first step, drive the motion of servo-driver and servomotor by digital input and output modules, when voltage rises, drive motors drives cutting head and descends, and when voltage descended, drive motors drove cutting head and rises.
In above-mentioned second step parameter being set can be passed among the PLC through the Modbus bus by RS232 by industrial computer.
In above-mentioned the 3rd step in the cutting process voltage signal between cutting head and sheet material can isolated variable through the isolated converter of 100:1 after, be passed to the CH1 port of the analog input module of PLC.
Can add be connected with PLC near alignment sensor, it is passed to PLC with signal in cutting in position fixing process, and cutting head is played a protective role.
Above-mentioned is that 3 proximity transducers that are mutually 120 degree angles are formed near alignment sensor.
Being provided with drive circuit among the PLC, is by the high-speed pulse delivery outlet driving servomotor of PLC, realizes the lifting of burning torch.Automatically the arc voltage value that detects the arc voltage value earlier before regulating and set compares, and need to determine whether to regulate; Regulate as really needing, then, drive the servomotor motion, and then regulate the height of burning torch, realize the automatic control of arc voltage by PLC high-speed pulse delivery outlet output pulse.
It is to finish jointly by industrial computer and touch-screen that the parameter of present embodiment is provided with part, and operation band arc voltage is heightened the CUT numerical control software that parameter is provided with option on the industrial computer, is the part of the online exploitation of whole diced system.It mainly is with the different different parameter settings of carrying out with cutting current of cutting material in the cutting process that content is set.The parameter that is provided with is presented on the main interface of digital control system in real time, has direct objectivity.
PLC comprises analog input (AD) module and digital input and output modules, and analog input module is used for the supply voltage through the 100:1 isolated variable is carried out analog-to-digital conversion, and magnitude of voltage is transformed to the treatable digital quantity of PLC.Digital input and output modules comprises common input and high speed input, and common input is used to connect the location approach signal, and the high speed output interface is used to drive servomotor.
The sensor of catching burning torch location and collision alarm is that 3 proximity transducers that are mutually 120 degree angles are formed, if burning torch collides sheet material and other objects when the location or in the cutting process, burning torch will be answered back to the disengaging locating slot, proximity transducer just has signal and is passed to PLC, and then produces relevant action.
As shown in Figure 3, voltage signal in the cutting process between cutting head and sheet material is through behind the isolated converter isolated variable of 100:1, be passed to the CH1 port of the analog input module of PLC, PLC is according to the analog-to-digital signal of AD module, parameter in conjunction with upper strata IPC is provided with drives the motion of servo-driver and servomotor.When voltage rose, drive motors drove cutting head and descends; When voltage descended, drive motors drove cutting head and rises.
Motor driving part is divided into PLC and drives servomotor.The Ai Mo that uses in the native system gives birth to EC20 series transistor output PLC two high-speed pulse delivery outlets, one of them is controlled as direction, one then can drive the servomotor motion according to PLC calculation process amount as speed control, by the height of mechanical platform and then control cutting torch.
Fig. 2 is a PLC wiring diagram of the present invention.
Stable performance of the present invention has automatic initial alignment, and arc voltage detects relatively, and driven by servomotor is crashproof, the advantages such as arc voltage intelligence adjusting.
Claims (9)
1. machine arc voltage Height-Adjusting System, comprise industrial computer (1), programmable logic controller (PLC) (2), servo drive (3), isolated converter (4) and plasma power supply (5), wherein, programmable logic controller (PLC) (2) respectively with industrial computer (1), servo drive (3) is connected with isolated converter (4), plasma power supply (5) is electrically connected with isolated converter (4), industrial computer (1) output cutting parameter signal is to programmable logic controller (PLC) (2), the voltage transformation signal that isolated converter (4) output collects is to programmable logic controller (PLC) (2), and programmable logic controller (PLC) (2) then sends instruction according to the information of being gathered and gives servo drive (3).
2. machine arc voltage Height-Adjusting System according to claim 1 is characterized in that: described programmable logic controller (PLC) (2) also is connected with near alignment sensor (6).
3. machine arc voltage Height-Adjusting System according to claim 2 is characterized in that: described is that 3 proximity transducers that are mutually 120 degree angles are formed near alignment sensor (6).
4. machine arc voltage Height-Adjusting System according to claim 1 is characterized in that: described industrial computer (1) is provided with touch-screen (7).
5. machine arc voltage Height-Adjusting System according to claim 1 is characterized in that: described industrial computer (1) is connected with programmable logic controller (PLC) (1) by the RS232 interface.
6. machine arc voltage Height-Adjusting System according to claim 1 is characterized in that: described servo drive (3) comprises servo-driver (8) and servomotor (9).
7. machine arc voltage Height-Adjusting System according to claim 6 is characterized in that: described servomotor (9) is the servomotor of band Position Control.
8. a machine may further comprise the steps with the control method of arc voltage Height-Adjusting System:
The first, by touch-screen (7) in the enterprising line parameter setting of industrial computer (1);
The second, parameter is set is passed in the programmable logic controller (PLC) (2) by industrial computer (1);
The 3rd, behind the isolated variable of the voltage signal in the cutting process between cutting head and sheet material through isolated converter (4), be passed to the CH1 port of the analog input module of programmable logic controller (PLC) (2);
The 4th, programmable logic controller (PLC) (2) is according to the analog-to-digital signal of analog input module, in conjunction with the parameter that is provided with in the above-mentioned first step, drive the motion of servo-driver (8) and servomotor (9) by digital input and output modules, when voltage rises, drive motors drives cutting head and descends, and when voltage descended, drive motors drove cutting head and rises.
9. the machine according to claim 8 control method of arc voltage Height-Adjusting System, it is characterized in that: in the 3rd step in the cutting process voltage signal between cutting head and sheet material be behind the isolated variable through the isolated converter of 100:1, be passed to the CH1 port of the analog input module of programmable logic controller (PLC) (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105952120A CN102069271A (en) | 2010-12-20 | 2010-12-20 | Arc voltage raising control system for machines and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105952120A CN102069271A (en) | 2010-12-20 | 2010-12-20 | Arc voltage raising control system for machines and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223549A (en) * | 2013-04-25 | 2013-07-31 | 北京灿烂阳光科技发展有限公司 | Detection device and method for arc voltage adjustment control system of plasma cutting machine |
| CN114101876A (en) * | 2021-11-22 | 2022-03-01 | 常州九圣焊割设备股份有限公司 | Intelligent plasma cutting method and system integrating arc voltage regulation and control |
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| CN201922161U (en) * | 2010-12-20 | 2011-08-10 | 广东工业大学 | Arc voltage adjusting control system for machine |
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| CN2370017Y (en) * | 1999-04-22 | 2000-03-22 | 东方汽轮机厂 | Plasma quenching device for metal blade |
| CN201922161U (en) * | 2010-12-20 | 2011-08-10 | 广东工业大学 | Arc voltage adjusting control system for machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103223549A (en) * | 2013-04-25 | 2013-07-31 | 北京灿烂阳光科技发展有限公司 | Detection device and method for arc voltage adjustment control system of plasma cutting machine |
| CN114101876A (en) * | 2021-11-22 | 2022-03-01 | 常州九圣焊割设备股份有限公司 | Intelligent plasma cutting method and system integrating arc voltage regulation and control |
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Application publication date: 20110525 |