CN104716550B - Laser Control Method and system and laser device, laser process equipment - Google Patents
Laser Control Method and system and laser device, laser process equipment Download PDFInfo
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Abstract
The invention provides a kind of laser Control Method and system and laser device, laser process equipment, its method includes：Obtain the time difference for shutting down the moment between the moment of currently starting shooting；Judged to shut down type according to the time difference；When belonging to the first shutdown type, then after the supply for the gas that is stopped, gas is recharged until the air-channel system pressure of laser and the difference of external pressure are poor more than preset pressure；When belonging to the second shutdown type, then after the supply for the gas that is stopped, gas is not recharged.Control flow and gas pressure control design of the invention by improving gas laser, it can shorten the available machine time, reduce the consumption of laser works gas, and improve the power stability of laser.
Description
Technical field
The present invention relates to gas laser Pressure Control Technology, more particularly to a kind of laser Control Method and system and
Laser device, laser process equipment.
Background technology
The fields such as traditional gas laser (such as high-power co2 laser) is cut in market, welding, cladding are extensive
Use, while also possess the very big market demand.With society progress and it is efficient require, all advocate now it is energy-saving,
Green science and technology, to reduce consumption of the unit product to the energy.High-power co2 laser, its operating pressure are about 1/10th
Atmospheric pressure, and material to working gas and ratio have strict requirements, otherwise laser can be directly influenced
The power output and normal operating conditions of itself.Therefore, when each laser works, it is required for first carrying out air-channel system
Emptying, is extracted into 1 millibar or so vacuum from a normal atmospheric pressure, the time of 10 minutes or so is generally required, along with work
Make the step such as recharge of gas, start to and be ready to from once complete laser, generally require about 15 minutes；It is if longer
Time does not have in harness laser, then need so it is repeated multiple times, generally require the time of a few hours, laser could be allowed to prepare
Complete, normal power and stability can be exported.And if starting laser by simple flow, then it can influence its gas
Gas filling effect in the system of road, the stability of laser is influenceed, therefore, the aspect of the above two has led to high power CO 2 and swashed
The shortcomings that light device, usually said available machine time are grown, and gas consumption is more, and power stability is slow.
The content of the invention
Based on this, it is necessary to for problem of the prior art, there is provided a kind of laser Control Method and system and laser
Device, laser process equipment, its control flow and gas pressure control design by improving gas laser, it can shorten
Available machine time, the consumption of laser works gas is reduced, and improve the power stability of laser.
A kind of laser Control Method, it includes：
Obtain the time difference for shutting down the moment between the moment of currently starting shooting；
Judged to shut down type according to the time difference；
When belonging to the first shutdown type, then after the supply for the gas that is stopped, gas is recharged until the gas of laser
It is poor that the difference of road system pressure and external pressure exceedes preset pressure；
When belonging to the second shutdown type, then after the supply for the gas that is stopped, gas is not recharged.
In one embodiment of the present of invention, methods described also includes：
After opening laser, the step of judging to shut down type according to the time difference is performed,
When belonging to the first shutdown type, then vacuumize process is carried out, until the air-channel system pressure of laser is less than the
During one startup setting value, start to supply working gas inside the air-channel system；
When belonging to the second shutdown type, then vacuumize process is carried out, until the air-channel system pressure of laser is less than the
During two startup setting values, start to supply working gas inside the air-channel system.
In one embodiment of the present of invention, in methods described, starting to supply holding for working gas to inside air-channel system
After row step, in addition to：
The air-channel system pressure is monitored in real time；
When the air-channel system pressure reaches the setting value of operating pressure, the frequency converter for starting laser is transported by blower fan
Turn, until setting value of the air-channel system pressure stability in operating pressure.
In one embodiment of the present of invention, described the step of judging according to the time difference and shut down type, includes：
Judge whether the time difference exceedes predetermined threshold value, if so, being then judged to belonging to the first shutdown type；If it is not, then
It is judged to belonging to the second shutdown type.
In one embodiment of the present of invention, described the step of judging according to the time difference and shut down type, includes：
Count the time difference obtained at least twice, generation analysis sample；
When the analysis sample meets preparatory condition, it is judged to belonging to the first shutdown type, is otherwise judged to belonging to the
Two shut down type.
It is described to obtain the step of shutting down the time difference between moment and current start moment in one embodiment of the present of invention
Including：
After closing laser power supply, start dead timer,
After opening laser, the record duration of the dead timer is read, using the record duration as the time
Difference；Or
After closing laser power supply, record shuts down the moment,
After opening laser, the record start moment,
The time interval that the shutdown moment is calculated between the moment of starting shooting, as the time difference.
A kind of Laser Control System, it includes：
Time-obtaining module, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting；
Type decision module, for being judged to shut down type according to the time difference；
Execution module, for when belonging to the first shutdown type, then after the supply for the gas that is stopped, it is straight to recharge gas
It is poor that the difference of air-channel system pressure and external pressure to laser exceedes preset pressure；When belonging to the second shutdown type, then exist
It is stopped after the supply of gas, does not recharge gas.
In one embodiment of the present of invention, the system includes：
Starting up's module, after opening laser, perform the type decision module；
The execution module is additionally operable to when belonging to the first shutdown type, then carry out vacuumize process, until laser
When air-channel system pressure starts setting value less than first, start to supply working gas inside the air-channel system；When belonging to
During two shutdown types, then vacuumize process is carried out, until when the air-channel system pressure of laser starts setting value less than second, opened
Begin to supply working gas inside the air-channel system.
A kind of laser device, including：Return-air heat exchanger, inflation heat exchanger, gas cell, blower fan, vavuum pump list
Member, the return-air heat exchanger, inflation heat exchanger, gas cell, blower fan and vacuum pump unit form the gas circuit system of laser
System, it also includes：
Controller, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting, judged according to the time difference
Type is shut down, the first control instruction is exported when being determined as and belonging to the first shutdown type, when being determined as belonging to the second shutdown type
When export the second control instruction；
The return-air heat exchange is according to first control instruction, the confession for the gas that is stopped in the inflation heat exchanger
After giving, gas is recharged until the air-channel system pressure of laser and the difference of external pressure are poor more than preset pressure；
The return-air heat exchange is according to second control instruction, the confession for the gas that is stopped in the inflation heat exchanger
After giving, gas is not recharged.
In one embodiment of the present of invention, the laser device also includes：Air-channel system pressure for detection laser
The differential pressure pickup of the difference of power and external pressure；
After the controller receives the power-on command of laser, perform and judged to shut down type according to the time difference, it is raw
Into the first control command or the second control command；
The vacuum pump unit carries out vacuumize process according to first control command, also, the controller is real-time
The output of the differential pressure pickup is received, when the air-channel system pressure of laser starts setting value less than first, is filled to described
Gas-heat exchanger output control order, to supply working gas to air-channel system the inside；
The vacuum pump unit carries out vacuumize process according to second control command, also, the controller is real-time
The output of the differential pressure pickup is received, when the air-channel system pressure of laser starts setting value less than second, is filled to described
Gas-heat exchanger output control order, to supply working gas to air-channel system the inside.
A kind of laser process equipment using above-mentioned laser device, it includes above-mentioned laser device.
The improved technology of the present invention is mainly used on gas laser, and the process equipment with laser, and it is solved
Gas laser in the prior art of having determined, which is needed by multi-time inflating, repeatedly start etc. is prolonged operates the problem of preparing, and carries
A kind of control method and Pressure Control Technology of advanced laser have been supplied, especially suitable for the gas laser of high power CO 2, it
The available machine time can be shortened.
The invention provides a kind of advanced laser to start control method, and it is the length by judging downtime,
Under both long and short states of downtime, refinement is controlled to realize Dynamic matrix control with detection method is improved, and it is solved
The existing startup of conventional laser control is loaded down with trivial details, efficiency is low, and the situation that control result is unstable.
Brief description of the drawings
Fig. 1 is one embodiment schematic flow sheet of the inventive method；
Fig. 2 is the schematic flow sheet of one of embodiment of flow of the present invention；
Fig. 3 is the schematic flow sheet of one of embodiment of flow of the present invention；
Fig. 4 is the air-channel system structural representation of laser in one embodiment of the invention；
Fig. 5 is the control system architecture schematic diagram of laser in one embodiment of the invention.
Embodiment
The improved technology of the present invention is mainly used on gas laser, and the process equipment with laser.Tradition
Laser needs the pressure control flow of the strict control of complete set, generally for the gas made in laser air-channel system
Reach strict requirements standard, it is necessary to which by multi-time inflating, repeatedly the prolonged operation such as start prepares, the present invention is based on existing
This technical problem present in technology, there is provided a kind of control method and Pressure Control Technology of advanced laser, especially
Suitable for the gas laser of high power CO 2, it can shorten the available machine time, effectively reduce the consumption of laser works gas,
And improve the power stability of laser.Describe the specific embodiment of the present invention in detail below with reference to accompanying drawing.
As shown in figure 4, laser generally includes：Return-air heat exchanger 2, inflate heat exchanger 3, for producing working gas
Gas cell 4, fan unit 5, vacuum pump unit 6, resonator 1, waste emission unit 7, above-mentioned return-air heat exchanger 2, fill
Gas-heat exchanger 3, gas cell 4, fan unit 5 and vacuum pump unit 6 etc. form the air-channel system of laser, in air-channel system
In, the gas output end of vacuum pump unit 6 connects with the gas input of waste emission unit 7, and the gas of vacuum pump unit 6 is defeated
Enter end to connect with a gas output end of fan unit 5 and return-air heat exchanger 2, two gases of return-air heat exchanger 2 are defeated
Enter end connection resonator 1, the gas input of another gas output end connection fan unit 5 of return-air heat exchanger 2, blower fan
One gas input of another gas output end connection inflation heat exchanger 3 of unit 5, the gas output of gas cell 4
Another gas input of end connection inflation heat exchanger 3, two gas output ends connection resonator of inflation heat exchanger 3
1, and the controller by setting up be uniformly coordinated above-mentioned return-air heat exchanger 2, inflation heat exchanger 3, gas cell 4, blower fan
Unit 5, vacuum pump unit 6 etc. are according to the orderly execution pressure control flow of corresponding order.Above-mentioned vacuum pump unit 6 is used to hold
Row vacuumize process, above-mentioned return-air heat exchanger 2 are used to recharge gas into air-channel system, and inflation heat exchanger 3 is used for gas
Working gas is filled in the system of road, working gas herein refers to strict ratio for the gas laser of high power CO 2
High-purity hybrid working gas.Above-mentioned fan unit 5 includes frequency converter and blower fan, operates blower fan using frequency converter.
As shown in figure 1, providing a kind of laser Control Method in embodiments of the invention, it includes each shown in Fig. 1
Individual step.
In the step s 100, the controller of laser obtains the time difference shut down between moment and current start moment.This
In the shutdown moment refer to the time that laser is stopped, such as close time of laser works power supply etc.；During start
Carve and refer to open the time that laser power supply starts laser works.Obtained in the present embodiment and shut down moment and current start moment
Between time difference, can be it is last open laser works after shut down moment and the current time for opening laser works
Difference.This step S100 can perform when opening laser works every time.
And the acquisition of this time difference can use following a variety of methods, for example, in one embodiment of the invention, if
Dead timer is put, after laser power supply is closed, starts dead timer, and after laser is opened, read above-mentioned shutdown
The record duration of timer, the above-mentioned time difference is used as by the use of the record duration.
Or in another embodiment of the present invention, after laser power supply is closed, record shuts down the moment, opens and swashs
After light device, the record start moment, the time interval for calculating the above-mentioned shutdown moment between the moment of starting shooting, with the time interval of calculating
As the above-mentioned time difference.
Also or, pass through the above-mentioned time difference of interactive mode acquisition user's input.
In step s 200, the controller of laser judges to shut down type according to the above-mentioned time difference, when judgement belongs to first
When shutting down type, then step S310 is performed, when judging to belong to the second shutdown type, then perform step S320.
In step S310, after above-mentioned inflation heat exchanger 3 is stopped the supply of gas, control recharge gas until
It is poor that the air-channel system pressure of laser and the difference of external pressure exceed preset pressure.Here the air-channel system pressure of laser with
The difference of external pressure can monitor acquisition testing result in real time by setting pressure difference transducer.
In step s 320, after above-mentioned inflation heat exchanger 3 is stopped the supply of gas, control does not recharge gas.
What is be mentioned herein recharges gas, can refer to recharge high purity N 2 for the gas laser of high power CO 2.
In an embodiment of the present invention, there is provided a kind of control method that can carry out laser start workflow automatically,
It is shut down the time difference between start by obtaining laser and treats the pressure control flow of laser to distinguish, so as to give
Different starts and shutdown operation scheme, the available machine time of laser is shortened, effectively reduces disappearing for laser works gas
Consumption, improve the stability of laser, improve operating efficiency.Also, the judgment mode based on pressure differential, it can utilize and set
Pressure difference transducer accurately obtains pressure differential detection result, avoids and only detects gas using single pressure sensor in the prior art
The internal pressure of road system and cause traditional pressure control flow, can not play a part of caused by enough air-prevention penetrates into
Laser the problem of more number is inflated and emptied repeatedly and consumes more working gas also be present.
In one of embodiment of the present invention, above-mentioned the step of judging according to the above-mentioned time difference and shut down type, includes：
Judge whether the above-mentioned time difference exceedes predetermined threshold value, if so, being then judged to belonging to the first shutdown type；If it is not, then
It is judged to belonging to the second shutdown type.
In an embodiment of the present invention, using directly by threshold decision shutdown duration, (i.e. laser is shut down and starts shooting it
Between time difference) judge to shut down type, for example shut down duration when exceeding predetermined threshold value T, be then judged to belonging to the first shutdown class
Type, on the contrary it is judged to belonging to the second shutdown type.Referring to more than predetermined threshold value here is more than or equal to predetermined threshold value T.This side
Formula is easy to be reliable, can be performed when opening laser works every time and judge whether the above-mentioned time difference exceedes predetermined threshold value, so as to
Laser each time is started into control flow and treats follow-up gas refilling operation according to the length differentiation of downtime.
In another embodiment of the present invention, above-mentioned the step of judging according to the above-mentioned time difference and shut down type, includes：
First, the time difference obtained at least twice, generation analysis sample are counted；This analysis sample can use form to remember
Record.
Then, the analysis sample is analyzed, when above-mentioned analysis sample meets preparatory condition, is judged to belonging to the first shutdown
Type, otherwise it is judged to belonging to the second shutdown type.Here preparatory condition can include following several classes：
First, start frequency is less than preset value, and this start frequency is obtained by analyzing above-mentioned analysis sample, start herein
Frequency refers to the start number in preset time.
Second, in preset time period the above-mentioned time difference exceed predetermined threshold value number be less than given threshold.
3rd, the time difference continuously acquired reaches predetermined value more than the number of predetermined threshold value, for example, obtaining twice in succession
Time difference exceed predetermined threshold value.
It can avoid causing machine in operating process corresponding to continuous two kinds of shutdown types of frequent switching in this way
The hardware deterioration of device, so as to ensure that within a period of time laser can maintain under certain work normality, be advantageous to
While reducing laser start preparation duration, ensure the service life of laser.
Certainly for above-mentioned a variety of modes that shutdown type is judged according to the above-mentioned time difference, in the one of real of the present invention
Apply in example, corresponding case, edit box can also be provided the user by man-machine interaction mode, sets interface etc. to obtain use
Family set on demand to according to the above-mentioned time difference judge shut down type preparatory condition, so as to provide the more users of user
Formula, and the product usage experience effect of lifting user, there is provided personalized service.
As shown in Fig. 2 in one of embodiment of the present invention, after laser is opened, perform according to the above-mentioned time difference
Judge the step S200 of shutdown type, then, when belonging to the first shutdown type, then perform step S210：Utilize above-mentioned vacuum
Pump unit 6 carries out vacuumize process, excludes gas, until when the air-channel system pressure of laser starts setting value less than first,
Start to supply working gas inside above-mentioned air-channel system；When belonging to the second shutdown type, then step S220 is performed：Using upper
State vacuum pump unit 6 and carry out vacuumize process, exclude gas, set until the air-channel system pressure of laser starts less than second
During value, start to supply working gas inside above-mentioned air-channel system.Here unlatching laser can include opening laser electricity
Source master switch etc..
In the present embodiment, it is contemplated that difference shuts down the situation of change of pressure in baric systerm under duration, can suitably shorten
The pressure control flow of laser, so as to further shorten the pressure control flow of laser on the whole.In the present invention
Another embodiment in, above-mentioned carry out vacuumize process is realized by opening the low pressure behavior of laser.It is mentioned herein
Low pressure behavior refers to：Laser is allowed to start to start by a low pressure button or control, its startup can produce following main
Action：1st, vavuum pump starts running, that is, has started vacuumize process；2nd, controller starts to detect water route aspect, gas supplying party
The pressure such as face or flow, to ensure that the ambient conditions that laser starts are to meet to require.Open low pressure behavior refer to start it is low
Pressure button or control come allow laser start startup make vavuum pump start running carry out vacuumize process.Meanwhile opening laser
After the low pressure behavior of device, the controller of laser starts to detect pressure or the flows such as water route aspect, gas supply respect.And close
Low pressure behavior refers to close low pressure button or control to allow laser to stop so that vavuum pump stops vacuumizing.
In one of embodiment of the present invention, as shown in figure 3, the above method also includes：It is first after laser is opened
Whether first detection is outside has warning message, if carrying out handling in next step again after then solving alarm condition, otherwise, directly
Into above-mentioned steps S100.Referred to herein as unlatching laser can include open laser power supply master switch.
Also for example, in one of embodiment of the present invention, as shown in figure 3,
After starting to supply the execution step of working gas to inside air-channel system, further comprising the steps of S410：It is first
First, controller monitors above-mentioned air-channel system pressure in real time；Then, when above-mentioned air-channel system pressure reaches the setting value of operating pressure
When, the frequency converter for starting laser operates by blower fan, and blower fan, when just starting to start, air-channel system pressure can the short time
Decline, until setting value of the above-mentioned air-channel system pressure stability in operating pressure, that is to say, that above-mentioned air-channel system pressure is again
When reaching the setting value of the operating pressure of laser, the high pressure behavior on laser can be carried out.
In addition, in another embodiment of the present invention, step is then performed when belonging to the second shutdown type for above-mentioned
Start the process to supply working gas inside above-mentioned air-channel system in S220, can subsequently be reduced by following steps S420
The pressure control flow of laser.For example, start simultaneously when starting and supplying working gas to inside above-mentioned air-channel system first
The frequency converter of laser operates by blower fan, monitors above-mentioned air-channel system pressure in real time, until above-mentioned air-channel system pressure stability exists
The setting value of operating pressure.
Based on above-mentioned each embodiment, after setting value of the above-mentioned air-channel system pressure stability in operating pressure, also wrap
Include following steps S500：Controller carries out the high pressure behavior on laser, and now laser is then in preparedness, can be with
Receive the control of Digit Control Machine Tool, carry out normal cutting processing task.Certainly, may be used also in the high pressure behavior on laser is carried out
With increase：Whether the stability of detection power and laser normally performs step, and laser is ready if normal, otherwise, according to
Secondary closing high pressure behavior, close frequency converter, close low pressure behavior, gas then being recharged, so as to ensure before laser life's work
Ensure that its is reliable and stable.High pressure behavior referred to herein refers to allow laser to obtain height by a high pressure button or button
Piezoelectricity is from its start completion, laser markable device completes machine startup preparation, can be with working condition at any time.Open high pressure
Behavior refers to start high pressure button or button to allow laser to obtain high pressure ionization, closes high pressure behavior and refer to close high pressure button
Or button allows the laser to lose high pressure ionization.
After laser completes normal work, it is necessary to by closing high pressure behavior successively, closing frequency converter, closing low pressure
Behavior, the supply for stopping mixed gas, start to reach corresponding bar similar to the gas of high purity N 2 toward recharging inside air-channel system
The shutoff operations such as part are prepared to start for laser next time, then in this shutoff operation process as shown in figure 3, executable
Above-mentioned steps S100 to step S300.When reopening laser next time, each step above is repeated again
Shown laser gas pressure control flow.
Based on the above method, present invention also offers a kind of Laser Control System, and it includes：
Time-obtaining module, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting；
Type decision module, for being judged to shut down type according to the above-mentioned time difference；
Execution module, for when belonging to the first shutdown type, then after the supply for the gas that is stopped, it is straight to recharge gas
It is poor that the difference of air-channel system pressure and external pressure to laser exceedes preset pressure；When belonging to the second shutdown type, then exist
It is stopped after the supply of gas, does not recharge gas.
Wherein, above-mentioned time-obtaining module, type decision module, execution module are respectively used to perform above-mentioned steps S100 extremely
Step S300.In addition, above-mentioned execution module be additionally operable to perform Fig. 2 and Fig. 3 in correlation step S210, S220, S410, S420,
The steps such as S500, the above-mentioned detailed description about each step in laser Control Method is for details, reference can be made to, it is not tired herein to state.
In one of embodiment of the present invention, above-mentioned Laser Control System can also include：
Starting up's module, after opening laser, perform the above-mentioned type determination module；
Above-mentioned execution module is additionally operable to when belonging to the first shutdown type, then carry out vacuumize process, until laser
When air-channel system pressure starts setting value less than first, start to supply working gas inside above-mentioned air-channel system；When belonging to
During two shutdown types, then vacuumize process is carried out, until when the air-channel system pressure of laser starts setting value less than second, opened
Begin to supply working gas inside above-mentioned air-channel system.
Fig. 1 is the schematic flow sheet of the method for one embodiment of the invention.Although it should be understood that Fig. 1 flow chart
In each step shown successively according to the instruction of arrow, but these steps be not the inevitable order according to arrow instruction according to
Secondary execution.Also, also corresponded in Fig. 2 and Fig. 3 and give additional step and stage by stage, it should be appreciated which part step
Not necessarily sequentially performed according to shown in the arrow in figure, in the case of not by technical scheme entirety principle, execution sequence can
To have adjusted, the realization of overall technical architecture and the solution of technical problem are had no effect on.Each embodiment is specifically above
Implementation in bright only just for corresponding steps is set forth, above-mentioned each then in the case where logic does not contradict
Embodiment be can be mutually combined and form new technical scheme, and the new technical scheme is still in this specific embodiment party
In the open scope of formula.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is carried on a non-volatile meter
In calculation machine readable storage medium (such as ROM, magnetic disc, CD, server storage), including some instructions are causing an end
End equipment (can be mobile phone, computer, server, or network equipment etc.) performs the system described in each embodiment of the present invention
Structures and methods.
Based on this, the present invention additionally provides a kind of laser device in one of the embodiments, as shown in Figure 4 and Figure 5,
It includes：It is return-air heat exchanger 2, inflation heat exchanger 3, gas cell 4, fan unit 5, vacuum pump unit 6, resonator 1, useless
Abandon exhaust unit 7, above-mentioned return-air heat exchanger 2, inflation heat exchanger 3, gas cell 4, fan unit 5 and vacuum pump unit 6
Deng the air-channel system for forming laser, to realize above-mentioned laser Control Method, also include in above-mentioned laser device：
Controller 9, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting, judged according to the above-mentioned time difference
Type is shut down, the first control instruction is exported when being determined as and belonging to the first shutdown type, when being determined as belonging to the second shutdown type
When export the second control instruction；
Above-mentioned return-air heat exchange 2 is stopped gas in above-mentioned inflation heat exchanger 3 according to above-mentioned first control instruction
After supply, gas is recharged until the air-channel system pressure of laser and the difference of external pressure are poor more than preset pressure；Above-mentioned return-air
Heat exchange 2 after above-mentioned inflation heat exchanger 3 is stopped the supply of gas, does not recharge gas according to above-mentioned second control instruction
Body.Controller noted above 9 also respectively with return-air heat exchanger 2, inflation heat exchanger 3, gas cell 4, fan unit 5, vavuum pump
Unit 6, resonator 1 connect with the control signal of waste emission unit 7.
In addition, above-mentioned laser device also includes：For the air-channel system pressure of detection laser and the difference of external pressure
Differential pressure pickup 8；
After controller noted above 9 receives the power-on command of laser, perform and judged to shut down type according to the above-mentioned time difference, it is raw
Into the first control command or the second control command；
Above-mentioned vacuum pump unit 6 carries out vacuumize process according to above-mentioned first control command, also, controller noted above is real-time
The output of above-mentioned differential pressure pickup is received, when the air-channel system pressure of laser starts setting value less than first, is filled to above-mentioned
Gas-heat exchanger output control order, to supply working gas to above-mentioned air-channel system the inside；
Above-mentioned vacuum pump unit 6 carries out vacuumize process according to above-mentioned second control command, also, controller noted above is real-time
The output of above-mentioned differential pressure pickup is received, when the air-channel system pressure of laser starts setting value less than second, is filled to above-mentioned
Gas-heat exchanger output control order, to supply working gas to above-mentioned air-channel system the inside.
Controller noted above is mainly used in controlling return-air heat exchanger 2, inflation heat exchanger 3, gas cell 4, fan unit
5th, the Methodistic coordination of idiographic flow for each embodiment that vacuum pump unit 6 etc. is provided according to above-mentioned laser Control Method
Work.For example, controller noted above is additionally operable to after starting to supply working gas to inside air-channel system, the gas is monitored in real time
Road system pressure, when the air-channel system pressure reaches the setting value of operating pressure, output control instructs, to start laser
The frequency converter of device operates by blower fan, until setting value of the air-channel system pressure stability in operating pressure.Controller noted above
Specific implementation function can adjust with the idiographic flow for each embodiment that above-mentioned laser Control Method is provided, specifically
Reference can be made to the related description of each embodiment of the above method, is not repeated herein.
Laser device shown in above-mentioned each embodiment can also be applied on various laser process equipments, such as
The laser process equipment in the places such as cutting, welding and marker field.Described in detail below by taking a kind of laser cutting device as an example
Its mode applied.
Present invention can also apply on a kind of laser cutting device, the equipment includes above-mentioned laser device, specifically may be used
Referring to the related description of each embodiment of above-mentioned laser device, it is not repeated herein.Laser cutting mentioned herein is set
It is standby to refer to a kind of equipment that technique processing is carried out using laser technology, and laser cutting device provided by the invention is except including upper
Laser device is stated, in addition to：
Fixture, for fixing workpiece to be machined；
Motion control mechanism, for according to the displacement control instruction received, the laser of control laser device transmitting
Move；
Computer control system, for sending displacement control instruction to motion control mechanism, existed using the laser of transmitting
The process operation of desired trajectory is completed on workpiece to be machined, such as cutting obtains the blank of requirement specification on workpiece to be machined.
It can also include, scanning system, view data, computer are formed for scanning situation about being cut on workpiece to be machined
Control system analysis view data obtains correction instruction, the displacement control sent according to correction instruction amendment to motion control mechanism
System instruction.Laser cutting device can improve the efficiency of cutting, make the surface for being cut place smooth, mellow and full, promptly reduce and cut
The temperature for the nonmetallic materials cut, reduce deformation and the internal stress of material to be cut；It can be widely used in various nonmetallic materials
Carry out the field of fine cut.
Above-mentioned laser device provided by the invention can be applied on laser cutting device commonly used in the prior art, may be used also
So that applied on other laser process equipments, the present invention is not intended to limit the laser process equipment concrete implementation function and other knots
Structure module, as long as having used the laser process equipment of the laser device described in above-mentioned each embodiment, just belong to the present invention's
Protection domain.
In practical operation, high-power co2 laser in the market, available machine time length be present, gas consumption is more, work(
Rate stablizes the shortcomings that slow；And the time that this shortcoming is parked with laser is older, then show more serious.Can in wait laser
To complete during normal work prepares, it is meaningless consume electricity, gas and time, reduce efficiency.The present invention is by changing
Enter the control flow and gas pressure control design of gas laser, when system is in long according to current lasers during start every time
Between stopped status, or frequent open state, automatically enter corresponding to a whole set of pressure control flow, so as to reach the available machine time
It hurry up, the advantages of gas consumption is few, and power stability is high.By the test of actual machine, shut down in the short time and the long period stops
In start after machine, controlled, can be respectively shortened as traditional available machine time using the control flow and atmospheric pressure of optimization
1/2 and 1/4, then it can reach that power is normal, machine is stable, meet client's requirement.
Furthermore it is possible to the air-channel system to high-power co2 laser increases by a differential pressure pickup, for detecting air-channel system
With the true pressure difference of ambient exterior atmospheric pressure, so as to avoid Different Altitude position machine, under single internal pressure detection case
, the inaccurate situation of data；The pressure difference for the setting for recharging gas can be also accurately controlled simultaneously, make air-channel system relatively outer
Portion's environment keeps certain malleation；This can is substantially completely excluded when laser is shut down for a long time, and extraneous air is to machine gas
The infiltration pollution of road system, need the multiple available machine time so as to caused.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (11)
1. a kind of laser Control Method, it is characterised in that methods described includes：
Obtain the time difference for shutting down the moment between the moment of currently starting shooting；
Judged to shut down type according to the time difference；
When belonging to the first shutdown type, then after the supply for the gas that is stopped, gas is recharged until the gas circuit system of laser
The difference of pressure of uniting and external pressure is poor more than preset pressure, and the air-channel system includes return-air heat exchanger and inflation heat exchange
Device；
When belonging to the second shutdown type, then after the supply for the gas that is stopped, gas is not recharged.
2. laser Control Method according to claim 1, it is characterised in that methods described also includes：
After opening laser, the step of judging to shut down type according to the time difference is performed,
When belonging to the first shutdown type, then vacuumize process is carried out, until the air-channel system pressure of laser opens less than first
During dynamic setting value, start to supply working gas inside the air-channel system；
When belonging to the second shutdown type, then vacuumize process is carried out, until the air-channel system pressure of laser opens less than second
During dynamic setting value, start to supply working gas inside the air-channel system.
3. laser Control Method according to claim 2, it is characterised in that in methods described, starting to gas circuit system
After the execution step of system the inside supply working gas, in addition to：
The air-channel system pressure is monitored in real time；
When the air-channel system pressure reaches the setting value of operating pressure, the frequency converter for starting laser operates by blower fan, directly
Extremely setting value of the air-channel system pressure stability in operating pressure.
4. laser Control Method according to claim 1, it is characterised in that described to judge to shut down according to the time difference
The step of type, includes：
Judge whether the time difference exceedes predetermined threshold value, if so, being then judged to belonging to the first shutdown type；If it is not, then judge
To belong to the second shutdown type.
5. laser Control Method according to claim 1, it is characterised in that described to judge to shut down according to the time difference
The step of type, includes：
Count the time difference obtained at least twice, generation analysis sample；
When the analysis sample meets preparatory condition, it is judged to belonging to the first shutdown type, is otherwise determined as that belonging to second stops
Machine type.
6. laser Control Method according to claim 1, it is characterised in that described obtain shuts down moment and current start
The step of time difference between moment, includes：
After closing laser power supply, start dead timer,
After opening laser, the record duration of the dead timer is read, using the record duration as the time difference；Or
Person,
After closing laser power supply, record shuts down the moment,
After opening laser, the record start moment,
The time interval that the shutdown moment is calculated between the moment of starting shooting, as the time difference.
7. a kind of Laser Control System, it is characterised in that the system includes：
Time-obtaining module, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting；
Type decision module, for being judged to shut down type according to the time difference；
Execution module, for when belonging to the first shutdown type, then after the supply for the gas that is stopped, recharging gas until swashing
It is poor that the air-channel system pressure of light device and the difference of external pressure exceed preset pressure, the air-channel system include return-air heat exchanger and
Inflate heat exchanger；When belonging to the second shutdown type, then after the supply for the gas that is stopped, gas is not recharged.
8. Laser Control System according to claim 7, it is characterised in that the system includes：
Starting up's module, after opening laser, perform the type decision module；
The execution module is additionally operable to when belonging to the first shutdown type, then carry out vacuumize process, until the gas circuit of laser
When system pressure starts setting value less than first, start to supply working gas inside the air-channel system；Stop when belonging to second
During machine type, then carry out vacuumize process, until laser air-channel system pressure less than second start setting value when, start to
Supply working gas inside the air-channel system.
9. a kind of laser device, including：Return-air heat exchanger, inflation heat exchanger, gas cell, blower fan, vacuum pump unit,
The return-air heat exchanger, inflation heat exchanger, gas cell, blower fan and vacuum pump unit form the air-channel system of laser,
Characterized in that, the laser device also includes：
Controller, for obtaining the time difference for shutting down the moment between the moment of currently starting shooting, judge to shut down according to the time difference
Type, the first control instruction is exported when being determined as and belonging to the first shutdown type, it is defeated when being judged to belonging to the second shutdown type
Go out the second control instruction；
The return-air heat exchanger is according to first control instruction, the supply for the gas that is stopped in the inflation heat exchanger
Afterwards, gas is recharged until the air-channel system pressure of laser and the difference of external pressure are poor more than preset pressure；
The return-air heat exchanger is according to second control instruction, the supply for the gas that is stopped in the inflation heat exchanger
Afterwards, gas is not recharged.
10. laser device according to claim 9, it is characterised in that the laser device also includes：For detecting
The differential pressure pickup of the air-channel system pressure of laser and the difference of external pressure；
After the controller receives the power-on command of laser, perform and judged to shut down type, generation the according to the time difference
One control command or the second control command；
The vacuum pump unit carries out vacuumize process, also, the controller real-time reception according to first control command
The output of the differential pressure pickup, when the air-channel system pressure of laser starts setting value less than first, to the inflation heat
Exchanger output control order, to supply working gas to air-channel system the inside；
The vacuum pump unit carries out vacuumize process, also, the controller real-time reception according to second control command
The output of the differential pressure pickup, when the air-channel system pressure of laser starts setting value less than second, to the inflation heat
Exchanger output control order, to supply working gas to air-channel system the inside.
A kind of 11. laser process equipment using the laser device of claim 9 or 10, it is characterised in that the equipment bag
Include the laser device described in claim 9 or 10.
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| CN116638166B (en) * | 2023-07-21 | 2023-10-31 | 苏州松德激光科技有限公司 | Intelligent temperature control method and system for high-precision welding processing |
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| JP2539835B2 (en) * | 1987-07-07 | 1996-10-02 | ファナック株式会社 | Gas laser device |
| JP3987300B2 (en) * | 2001-04-24 | 2007-10-03 | ファナック株式会社 | Gas laser oscillator |
| CN101377666B (en) * | 2007-08-28 | 2011-04-06 | 深圳市大族激光科技股份有限公司 | Control method of high power laser |
| JP2010212559A (en) * | 2009-03-12 | 2010-09-24 | Panasonic Corp | Gas laser oscillator |
| CN103701015A (en) * | 2013-12-11 | 2014-04-02 | 深圳市大族激光科技股份有限公司 | Control method and control device thereof for refilling of protective gas of gas laser |
| CN104184039B (en) * | 2014-08-07 | 2018-01-02 | 大族激光科技产业集团股份有限公司 | A kind of high power CO2The quick start system and method for laser |
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Effective date of registration: 20220124 Address after: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee after: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Patentee after: Shenzhen Han nationality Guangpu Technology Co., Ltd Address before: 518000 Dazu laser building, 9 new West Road, North Nanshan District high tech park, Shenzhen, Guangdong Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. |