CN106238886A - Inverse type direct current plasma power supply cutting method - Google Patents
Inverse type direct current plasma power supply cutting method Download PDFInfo
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- CN106238886A CN106238886A CN201610665991.4A CN201610665991A CN106238886A CN 106238886 A CN106238886 A CN 106238886A CN 201610665991 A CN201610665991 A CN 201610665991A CN 106238886 A CN106238886 A CN 106238886A
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- Prior art keywords
- power supply
- plasma power
- current
- cutting
- electric current
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
Abstract
The invention provides a kind of inverse type direct current plasma power supply cutting method, including initialize rise with carrying out shake communication, self-inspection, wait, instantaneous short-circuit, arc blow-out, arc transfer, electric current, stable cutting, electric current gradually drop and the step such as shutdown.Method also provides for defencive function, make plasma power supply cutter system autostop under abnormal condition: when shake hands failure time perform error code；Some step is not up to if there is index or in the case of operation failure, real-time guard will start.The method that the present invention proposes, its process structure simplifies, clear logic, it is possible to achieve maximum output current is the plasma power supply cutting of 105A, respond well, practical.
Description
Technical field
The present invention relates to plasma power supply cutting field, in particular it relates to a kind of inverse type direct current plasma power supply cutting
Method.
Background technology
Plasma cutting is metal part or the local melting utilizing the heat of high-temperature plasma electric arc to make workpiece incision
(and evaporation), and borrow the isoionic momentum of high speed to get rid of motlten metal to form a kind of processing method of otch.Plasma cutting
Its application in the industry that efficiently makes of technology has more and more universal trend, and about the technological process of plasma cutting at this
It technology is a critically important ring.
But, by the retrieval of prior art is found, to the research of direct current plasma power supply cutting technique flow process very
Few.Research to the cutting of direct current plasma power supply is mainly concentrated in being controlled output voltage electric current and how improving
The aspects such as starting the arc success rate.Liu Baoqi et al. proposes one on " Proceedings of the CSEE " of 2011 and has instruction electricity
The double-loop control strategy of the electric current outer shroud voltage inter-loop of stream feedforward, by setting up the equivalent mathematical model of cutting power supply, to double
Closed loop system has carried out frequency-domain analysis and design, overcomes and is likely to occur the shortcoming that striking is failed under traditional mode, suppresses simultaneously
The disturbance of broaching load；Sun Qiang et al. establishes the mathematical model of plasma-arc in " the welding journal " of 2014, carries
Go out a kind of NEW TYPE OF COMPOSITE control strategy, meet power supply under non-high-frequency arc strike loading condition to rapidity and the control of stability
Demand processed.In terms of patent retrieval, Central China University of Science and Technology woods birch et al. proposes a kind of digitized plasma volume cutting machine and controls
System, is used DSP as control centre, is controlled by the coordination between main power source, gas system, cooling system, it is achieved that whole
The general function of individual CUT control system.
In sum, the research cut direct current plasma power supply at present is mainly concentrated in entering output voltage electric current
Row controls and how to improve the aspects such as starting the arc success rate, and the research of article on plasma cutting technique flow process is the fewest.But with this
Meanwhile, plasma cutting process flow process is but the link that plasma cutting technique is not walked around.Along with plasma cutting skill
How the application of art and popularization, determine that plasma cutting process flow process has been increasingly becoming a new research direction.
Summary of the invention
For existing about plasma cutting technique, the invention provides a kind of inverse type direct current plasma power supply cutting
Method.
The present invention provide inverse type direct current plasma power supply cutting method, include initialization with carrying out shake communication, self-inspection,
Wait, instantaneous short-circuit, arc blow-out, arc transfer, electric current rise, stable cutting, electric current gradually drop and the basic step such as shutdown.This method is also
Provide defencive function, make plasma power supply cutter system autostop in the case of abnormal running: when shake hands failure time
Perform error code；Not up to or guarantor in real time in the case of operation failure, will be started if there is index in some step
Protect.
The inverse type direct current plasma power supply cutting method that the present invention provides, comprises the steps:
Step S1, plasma power supply cutter system initializes and performs carrying out shake communication operation.
Preferably, step S1 comprises the steps:
Powering on to plasma power supply cutter system, the processor DSP of plasma power supply inverse type DC-DC converter is micro-
Under processor mode start, in DSP external flash and DSP internal memory, start to perform program code, DSP hardware carry out limited initially
Change (I/O port, PWM delivery outlet, ADC mouth, intervalometer, exterior interrupt, software watchdog etc. are initialized), calculate contrast
The verification of DSP external flash and DSP internal memory and, if verification and be not inconsistent, the program code in DSP external flash is copied to
In DSP internal memory, skip to DSP internal memory, start to perform program code；DSP hardware initializes comprehensively, reads on EEPROM data acquisition
The current settings of secondary processing operation；Execution carrying out shake communication operates, if shaking hands successfully, plasma power supply cutter system proceeds to step
The self-inspection state of S2, if shaking hands unsuccessfully, then performs error code, and plasma power supply cutter system proceeds to the shutdown of step S10
State.
Step S2, self-inspection, if self-inspection is passed through, plasma power supply cutter system proceeds to the waiting state of step S3；If from
Examining unsuccessfully, perform error code, plasma power supply cutter system proceeds to the stopped status of step S10.
Preferably, step S2 includes following self-inspection content:
Check the starting the arc (striking) signal at stop, check coolant stream when powering up and/or check whether there is plasma power supply
Inverse type DC-DC converter electric current, i.e. cutting current.
Step S3, waits:
The output signal of plasma power supply inverse type DC-DC converter (controls the letter of CUT start and stop
Number) close, cutting current setting value is set to zero, arranges 5-10s time delay, it is preferable that arrange 6s time delay, in order to make
The processor of ion power supply cutting machine miscellaneous part carries out initialization operation；Plasma power supply cutter system waits from numerical control
Sending of the enabled instruction of the plasma power supply inverse type DC-DC converter of system；If there being sending of enabled instruction, perform program
Proceed to the instantaneous short-circuit state of step S4；If without enabled instruction, wait, until there being plasma power supply inverse type DC-DC the most always
Sending of the enabled instruction of changer.
Step S4, instantaneous short-circuit:
Striking electric current (first striking, arc blow-out after striking success enter cutting current state, start to cut metal works) sets
Value, equal to transient short-circuit current, shows that striking arrives successfully, now can release waiting signal (signal that holding state terminates),
Detection striking current value is the most up to standard simultaneously, if striking current value is up to standard, proceeds to the arc blow-out state of step S5, if striking current value
The most up to standard, perform step S10 and shut down.
Step S5, arc blow-out:
Plasma power supply controller sends instruction, connects pilot arc controller and pilot arc relay, in the delay of 50ms
After send HF (high frequency) pulse and make pilot arc cut-off；If cutting current is equal to the half of pilot arc electric current, close HF
(high frequency) pulse enters arc transfering state, i.e. arc blow-out state, if arc blow-out failure, perform step S10 and shut down.
Step S6, arc shifts:
If active conductors electric current now, i.e. cutting current enter the electricity of step S7 more than transfer with reference to electric current, operation
Stream propradation, and close pilot arc controller and pilot arc relay；If cutting current now sets less than cutting current
The half of definite value, then connect HF pulse；If the failure of arc transfer process, then perform step S10 and shut down.
Step S7, electric current rises:
If the perforation of metal works completes, then close the input signal of plasma power supply controller, CUT
Gas-operated platform will switch to cutting stream gaseous state, the cutting current edged up depends on that different types of plasma power supply is cut
Cutting mill lathe；Once cutting current is more than or equal to cutting current setting value, and gas-operated platform enters the stable cutting of step S8
State；If cutting current rises unsuccessfully, then sending stopping signal, process gradually drops in the electric current performed in step S9.
Step S8, stable cutting:
If the perforation of metal works completes, and the input signal of plasma power supply controller is closed, and gas-operated platform is cut
Shift to cut gas body；If (there is the situation of corner to corner electric current in workpiece shapes, and corner electric current is less than normal cutting current
A cutting current, for being cut with the transition current of corner workpiece) input signal open, switch to corner current setting value；
If the input of the starting the arc (striking) signal is closed, then cutting process (operation) enters the electric current of step S9 and declines state, the most less cuts
Cut electric current.
Step 9, electric current gradually drops:
According to different plasma power supply cutting machine machine tool types, carry out different fall stream and process, and according to different plasmas
Power supply cutting machine machine tool type situation, allows the waiting state of gas-operated platform entrance step S3 or electric current gradually drop state, once cuts
Cutting electric current and decline and reach cut-off current, gas-operated platform enters final electric current and gradually drops state.
Step S10, shuts down:
Gas-operated platform enters stopped status, and all output valves of gas-operated platform are closed, the number of CUT
The fault output release of Ore-controlling Role (CNC), cutting current setting value is equal to zero, and gas-operated platform waits from CUT
The reset request of digital control system (CNC).
Compared with prior art, the present invention has a following beneficial effect:
1, the inverse type direct current plasma power supply cutting method that the present invention provides, illustrates once complete cutting process
Need each concrete steps performed, provide complete set and detailed workflow for plasma power supply cutting technique, for
The popularization and application of plasma power supply cutting technique serve certain effect.
2, the present invention both provides enforcement defencive function in a lot of steps so that the work of plasma power supply cutter system
Work can be more reliable and more stable.
3, the inverse type direct current plasma power supply cutting method that the present invention proposes, its process structure simplifies, and logic is clear
Clear, it is possible to achieve maximum output current is the plasma power supply cutting of 105A, respond well, practical.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
The sketch map of the inverse type direct current plasma power supply cutting method technological process that Fig. 1 provides for the present invention.
Fig. 2 is plasma power supply cutter system configuration schematic diagram.
In figure: 1 is plasma power supply, 2 is striking case, and 3 is Pneumatic controlled box, and 4 is valve group, and 5 is hand-held remote controller, and 6 is outside
Remote control cable, 7 is cutting torch Height-adjusting device, and 8 is digital control system CNC, and 9 is workpiece.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some changes and improvements.These broadly fall into the present invention
Protection domain.
The present invention provide inverse type direct current plasma power supply cutting method, include initialization with carrying out shake communication, self-inspection,
Wait, instantaneous short-circuit, arc blow-out, arc transfer, electric current rise, stable cutting, electric current gradually drop and the most required step such as shutdown.This work
Additionally provide various defencive function as flow process, make system autostop under abnormal condition: when shake hands failure time perform mistake
Code；Some step is not up to if there is index or in the case of operation failure, real-time guard will start.
Step S1, plasma power supply cutter system initializes and performs plasma power supply inverse type DC-DC converter
Carrying out shake communication operation between controller and digital control system (CNC)；Specifically include following steps:
Power on to plasma power supply cutter system, the processor of plasma power supply inverse type DC-DC converter controller
DSP starts in a microprocessor mode, starts to perform program code in DSP external flash with DSP internal memory, and DSP hardware is limited
Initialize and (include initializing I/O port, PWM mouth, ADC mouth, external interrupt and outside seizure mouth, intervalometer and software watchdog etc.
Resource), calculate DSP external flash and DSP internal memory verification and, if verification and not being inconsistent, by the program generation in DSP external flash
Code copies to, in DSP internal memory, skip to DSP internal memory, starts to perform program code；DSP hardware initializes comprehensively, reads EEPROM number
Set according to obtaining the last cutting current adding man-hour；Execution carrying out shake communication operates, if shaking hands successfully, and plasma power supply cutting machine
System proceeds to the self-inspection state of step S2, if shaking hands unsuccessfully, then performs error code, and plasma power supply cutter system proceeds to step
The stopped status of rapid S10.
Step S2, self-inspection, if self-inspection is passed through, plasma power supply cutter system proceeds to the waiting state of step S3；If from
Examining unsuccessfully, perform error code, plasma power supply cutter system proceeds to the stopped status of step S10.
Step S2 includes following self-inspection content:
Check whether the starting the arc (i.e. striking) signal closes, it is the most qualified to check coolant stream when powering up and/or inspection is
No have cutting current.
Step S3, waits:
The output signal of plasma power supply inverse type DC-DC converter is closed, and cutting current setting value is set to zero, arranges 5-
10s time delay, preferably 6s, in order to the miscellaneous part processor of plasma power supply cutting machine carries out initialization operation；Deng from
Sub-power supply cutting machine inverse type DC-DC converter system waits and sending from digital control system (CNC) enabled instruction；If there being startup to refer to
Sending of order, proceeds to the instantaneous short-circuit state of step S4；If without enabled instruction, wait, until there being enabled instruction to send the most always
Till.
Step S4, instantaneous short-circuit:
If cutting current setting value is equal to transient short-circuit current, then releases waiting signal, i.e. halt signal, detect simultaneously
Cutting current value is the most up to standard, if cutting current is up to standard, proceeds to the arc blow-out state of step S5, if cutting current is the most up to standard, performs
Step S10 is shut down.
Step S5, arc blow-out:
First plasma power supply controller connects pilot arc controller and pilot arc relay, then after the delay of 50ms
Send high frequency HF pulse, make pilot arc cut-off；If cutting current is equal to the half of pilot arc electric current, then plasma electric
Source controller cuts out high frequency HF pulse and enters arc transfering state, if arc blow-out failure, performs step S10 and shuts down.
Step S6, arc shifts:
If active conductors electric current (cutting current) is more than transfer with reference to electric current, operation enters the electric current of step S7 and rises shape
State, and close pilot arc controller and pilot arc relay；If cutting current is less than the half of cutting current setting value, then connect
Logical high frequency HF pulse；If arc shifts unsuccessfully, then perform step S10 and shut down.
Step S7, electric current rises:
If the perforation of metal works completes, then close the input signal of plasma power supply controller, CUT
Gas-operated platform will switch to cutting stream gaseous state, the cutting current edged up depends on different types of plasma cutting
Machine；Once cutting current is more than or equal to cutting current setting value, and gas-operated platform enters the stable cut state of step S8；If
Cutting current rises unsuccessfully, then send stopping signal, and process gradually drops in the electric current performed in step S9.
Step S8, stable cutting:
If bored a hole, and input signal is closed, and gas-operated platform switches to cut gas body；If corner electric current
The situation of corner (workpiece shapes occur) input signal is opened, and switches to corner current setting value；If the starting the arc (i.e. striking) is believed
Number input close, then cutting process (operation) enter step S9 electric current decline state, the most less cutting current.
Step 9, electric current gradually drops:
According to different CUT types, carry out different fall stream and process, and according to different CUT classes
Type situation, allows the waiting state of gas-operated platform entrance step S3 or electric current gradually drop state, and once cutting current declines and reaches
Cut-off current, gas-operated platform enters final electric current and gradually drops state.
Step S10, shuts down:
Gas-operated platform enters stopped status, and all output valves of gas-operated platform are closed, the number of CUT
The fault output release of Ore-controlling Role (CNC), cutting current setting value is equal to zero, and gas-operated platform waits from CUT
The reset request of digital control system (CNC).
So far, one step completed plasma cutting process is completed.
The inverse type direct current plasma power supply cutting method that the present embodiment provides, by initializing and performing carrying out shake communication
Operation, self-inspection, wait, instantaneous short-circuit, arc blow-out, arc transfer, electric current rise, stable cutting, electric current gradually drop and the step such as shutdown, with
And the defencive function provided, make plasma power supply cutter system autostop under abnormal condition: when shake hands failure time hold
Row error code；Some step is not up to if there is index or in the case of operation failure, real-time guard will start.
The method that the present invention proposes, its process structure simplifies, clear logic, it is possible to achieve maximum output current be 105A grade from
Sub-power supply cuts, respond well, practical.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise, this not shadow
Ring the flesh and blood of the present invention.In the case of not conflicting, the feature in embodiments herein and embodiment can any phase
Combination mutually.
Claims (4)
1. inverse type direct current plasma power supply cutting method, it is characterised in that comprise the steps:
Step S1, plasma power supply cutter system initializes and performs carrying out shake communication operation；
Step S2, self-inspection, if self-inspection is passed through, plasma power supply cutter system proceeds to the waiting state of step S3；If self-inspection is lost
Losing, perform error code, plasma power supply cutter system proceeds to the stopped status of step S10；
Step S3, waits:
The output signal of plasma power supply inverse type DC-DC converter is closed, and cutting current setting value is set to zero, arranges 5-10s
Time delay；Plasma power supply cutter system waits the plasma power supply inverse type DC-DC converter from digital control system
Sending of enabled instruction；If there being sending of enabled instruction, proceed to the instantaneous short-circuit state of step S4；If without enabled instruction, then one
Straight wait, until there being enabled instruction to send；
Step S4, instantaneous short-circuit:
Cutting current setting value is equal to transient short-circuit current, and waiting halt signal releases, and whether detection striking current value reaches simultaneously
Mark, if striking current value is up to standard, proceeds to the arc blow-out state of step S5, if striking electric current is the most up to standard, performs step S10 and shuts down；
Step S5, arc blow-out:
Plasma power supply controller connects pilot arc controller and pilot arc relay, after arc blow-out starts after the delay of 50ms etc.
Ion power supply controller sends HF pulse and makes pilot arc cut-off；If the cutting current of plasma power supply is equal to striking electricity
The half of stream, then plasma power supply controller stops sending HF pulse entrance arc transfering state, if arc blow-out failure, plasma power supply
Controller performs step S10, shuts down, i.e. plasma power supply controller returns to initial holding state；
Step S6, arc shifts:
If active conductors electric current enters the electric current propradation of step S7, plasma power supply more than transfer with reference to electric current, operation
Controller cuts out pilot arc controller and pilot arc relay；If plasma power supply cutting current cuts less than plasma power supply
The half of current setting value, plasma power supply controller sends HF pulse；If arc shifts unsuccessfully, plasma power supply controller performs
Step S10, shuts down, i.e. plasma power supply controller returns to initial holding state；
Step S7, electric current rises:
If metal works has been bored a hole, then close the input signal of plasma power supply controller, plasma power supply cutting machine
Gas-operated platform mode of operation switches to cutting stream gaseous state, and the plasma power supply cutting current edged up depends on dissimilar
Plasma power supply cutting machine lathe；Once plasma power supply cutting current sets more than or equal to plasma power supply cutting current
Value, gas-operated platform enters the stable cut state of step S8；If plasma power supply cutting current rises unsuccessfully, plasma power supply
Controller sends stopping signal, and process gradually drops in the electric current performed in step S9；
Step S8, stable cutting:
If corner current input signal is opened, switch to corner current setting value；If striking signal input close, then wait from
The sub-whole operation of power-supply controller of electric order enters the electric current of step S9 and declines state；
Step 9, electric current gradually drops:
According to the difference of each plasma power supply cutting machine lathe, carry out different fall stream and process, according to plasma power supply cutting machine machine
The situation of bed, allows the waiting state of gas-operated platform entrance step S3 or electric current gradually drop state, the once copped wave of plasma power supply
Device output electric current reaches cut-off current, and what the gas-operated platform final electric current of entrance gradually dropped supplies gaseity；
Step S10, shuts down:
Gas-operated platform enters stopped status, and all machinery valves output of gas-operated platform is closed, and digital control system mistake exports
Opening, plasma power supply cutting current setting value is equal to zero, and the waiting of gas-operated platform is from the reset request of digital control system.
Inverse type direct current plasma power supply cutting method the most according to claim 1, it is characterised in that step S1 include as
Lower step:
Powering on to plasma power supply cutter system, in plasma power supply inverse type DC-DC converter, processor DSP is in micro-process
Starting under device pattern, start to perform program code in DSP external flash and DSP internal memory, plasma power supply inverse type DC-DC becomes
In parallel operation, processor DSP hardware carries out power-up initializing, calculate DSP external flash and the verification of DSP internal memory and, if verification and
It is not inconsistent, copies to the program code in DSP external flash, in DSP internal memory, skip to DSP internal memory, start to perform program code；
DSP hardware initializes comprehensively, reads EEPROM data acquisition and processed the current settings of operation last time；Execution carrying out shake communication operates,
If shaking hands successfully, plasma power supply cutter system proceeds to the self-inspection state of step S2, if shaking hands unsuccessfully, then performs mistake generation
Code, plasma power supply cutter system proceeds to the stopped status of step S10.
Inverse type direct current plasma power supply cutting method the most according to claim 1, it is characterised in that step S2 include as
Lower any one or a multinomial self-inspection content:
-check striking signal at stop situation；
-check that coolant stream when powering up is the most normal；
-check for plasma power supply inverse type DC-DC converter electric current.
Inverse type direct current plasma power supply cutting method the most according to claim 1, it is characterised in that in step S3, prolong
Set of time is 6s late.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610665991.4A CN106238886B (en) | 2016-08-12 | 2016-08-12 | Inverse type direct current plasma power supply cutting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610665991.4A CN106238886B (en) | 2016-08-12 | 2016-08-12 | Inverse type direct current plasma power supply cutting method |
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| CN106238886A true CN106238886A (en) | 2016-12-21 |
| CN106238886B CN106238886B (en) | 2019-04-19 |
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| CN201610665991.4A Expired - Fee Related CN106238886B (en) | 2016-08-12 | 2016-08-12 | Inverse type direct current plasma power supply cutting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464576A (en) * | 2019-01-21 | 2020-07-28 | 马春辉 | Method and device for controlling welding and cutting equipment, electronic equipment and storage medium |
| CN111451609A (en) * | 2019-01-21 | 2020-07-28 | 马春辉 | Method and device for controlling welding and cutting equipment, electronic equipment and storage medium |
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| JPH0819872A (en) * | 1994-06-30 | 1996-01-23 | Daihen Corp | Plasma arc machining equipment |
| CN101560906A (en) * | 2009-05-22 | 2009-10-21 | 武汉长海高新技术有限公司 | Device and method for comprehensively controlling and protecting pump set of diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464576A (en) * | 2019-01-21 | 2020-07-28 | 马春辉 | Method and device for controlling welding and cutting equipment, electronic equipment and storage medium |
| CN111451609A (en) * | 2019-01-21 | 2020-07-28 | 马春辉 | Method and device for controlling welding and cutting equipment, electronic equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| CN106238886B (en) | 2019-04-19 |
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