CN201201126Y - Laser-welding apparatus and photo-electric detection circuit thereof - Google Patents
Laser-welding apparatus and photo-electric detection circuit thereof Download PDFInfo
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- CN201201126Y CN201201126Y CN 200820093770 CN200820093770U CN201201126Y CN 201201126 Y CN201201126 Y CN 201201126Y CN 200820093770 CN200820093770 CN 200820093770 CN 200820093770 U CN200820093770 U CN 200820093770U CN 201201126 Y CN201201126 Y CN 201201126Y
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- beam welding
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Abstract
The utility model is suitable for the field of laser welding and provides a laser welder and a photoelectric detection circuit thereof. The photoelectric detection circuit comprises a light pick-up circuit which detects whether light generated by a light path system is picked up or not and generates detection signals, a light signal processing circuit which processes the detection signals generated by the light pick-up circuit into control signals of the laser welder, and an output control circuit which outputs the control signals of the laser welder obtained by the light signal processing circuit. By arrangement of the photoelectric detection circuit for the laser welder, when the photoelectric detection circuit detects that the laser welder is in the abnormal state, workpieces to be welded are stopped from being transmitted to the laser welder and the welding operation on the workpieces is stopped, thereby avoiding the influence on the product quality because unwelded workpieces flow into the next procedure, and reducing the economic loss of manufacturers.
Description
Technical field
The utility model belongs to the laser weld field, relates in particular to a kind of laser-beam welding machine and photoelectric detective circuit thereof.
Background technology
Laser-beam welding machine is generally by power-supply system, light path system, control system, as employing programmable logic controller (PLC) (Programmable Logic Controller, PLC) as control system, and water circulation system etc. is partly formed, its high-octane laser pulse that utilizes light path system to produce heats the workpiece that needs weld, workpiece is melted in together in the short time at the utmost point, thereby reaches the effect of welding.Laser-beam welding machine is as a kind of novel welding processing equipment,, high accuracy high-speed with it, high efficiency, automation a bit outstanding and obtained using widely in multiple fields such as battery processing, space flight and aviation, national defence guidances.
The light path system of laser-beam welding machine as shown in Figure 1, it comprises xenon flash lamp 11, laser pump cavity 12, crystal 13, the mirror holder 14 that is all-trans (on this mirror holder that is all-trans total reflective mirror being installed) and half anti-mirror holder 15 (should on the half anti-mirror holder half anti-mirror be installed) etc.In laser beam welding, at first light xenon flash lamp 11 by power-supply system, and export constant little electric current and make xenon flash lamp 11 be in pre-igniting state, make the xenon flash lamp discharge by control system control power-supply system again, and produce the light wave of certain pulsewidth and frequency, light wave is at laser pump cavity 12 internal radiation crystal 13, make crystal 13 stimulated radiations, after passing through laserresonator resonance again, producing wavelength is the laser beam 16 of 1064nm, laser beam 16 expands bundle through half anti-mirror on total reflective mirror on the mirror holder 14 that is all-trans and the half anti-mirror holder 15, reflection, after the focusing, can come by the laser head (scheming not shown) that control system is controlled laser-beam welding machine workpiece is carried out the precision welding.Wherein workpiece is to be sent to the position that laser can focus on by feed system.
Existing laser-beam welding machine is in welding process, control system and light path system are two relatively independent systems, because laser-beam welding machine lacks relevant detection and warning device, when operate as normal appears unusually and not in light path system, control system is still controlled the feed system automatic loading/unloading, cause the workpiece that does not have welding to flow into next process, have a strong impact on the quality of product, bring enormous economic loss to factory.
The utility model content
The purpose of this utility model is to provide a kind of photoelectric detective circuit, is intended to solve existing laser-beam welding machine owing to lack the relevant detection circuit, and the workpiece of the not welding that causes flows into next process, and has a strong impact on the problem of product quality.
Another purpose of the present utility model is to provide a kind of photoelectric detective circuit, and described photoelectric detective circuit comprises:
Detect light that whether picks up the light path system generation and the light pick-up circuit that produces detection signal;
The detection signal of described smooth pick-up circuit generation is processed into the optical signal processing circuit of the control signal of laser-beam welding machine;
The output control circuit of the control signal output of the laser-beam welding machine that described optical signal processing circuit is obtained.
Another purpose of the present utility model is to provide a kind of laser-beam welding machine, comprise the power-supply system that power supply is provided, lasing light path system, the control system of control welding operation and the feed system that transmits workpiece to be welded, described laser-beam welding machine also comprises the photoelectric detective circuit that optical relay is connected with described power-supply system that goes out by described light path system, and the output of described photoelectric detective circuit is electrically connected with described control system and feed system.
In the utility model, by photoelectric detective circuit being set for laser-beam welding machine, photoelectric detective circuit judges by detecting the laser that whether picks up the laser-beam welding machine generation whether laser-beam welding machine is in abnormality, when laser-beam welding machine is in abnormality, stop to transmit workpiece to be welded to laser-beam welding machine, and stop workpiece being carried out welding operation, the workpiece of welding flows into next process thereby avoided not, and influence the quality of product, reduced the economic loss of manufacturer.
Description of drawings
Fig. 1 is the structure composition diagram of the light path system of the laser-beam welding machine that provides of prior art;
Fig. 2 is the structured flowchart of the laser-beam welding machine that provides of the utility model;
Fig. 3 is the schematic diagram of the photoelectric detective circuit that provides of the utility model.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
In the utility model, by a photoelectric detective circuit is set for laser-beam welding machine, whether the light path system by this photoelectric detective circuit detection laser bonding machine normally moves, whether the control system of laser-beam welding machine carries out welding job according to the testing result control laser-beam welding machine of this photoelectric detective circuit, automatic feeding system determines whether to continue feeding according to the testing result of this photoelectric detective circuit, thereby when the light path system of laser-beam welding machine takes place when unusual, stop workpiece being carried out welding operation, having avoided not, the workpiece of welding flows into next process.
Fig. 2 shows the brief block diagram of the laser-beam welding machine that the utility model provides, and existing laser-beam welding machine includes other unit or circuit such as power-supply system 21, light path system 22, control system 23 and feed system 24.Power-supply system 21 provides power supply for the parts such as light path system 22, control system 23 and feed system 24 of laser-beam welding machine.Light path system 22 produces laser in the laser-beam welding machine welding process.The workpiece that the laser head of control system 23 control laser-beam welding machines sends feed system 24 carries out the laser weld operation.
The utility model has increased photoelectric detective circuit 25 on the basis of the above-mentioned existing structure of laser-beam welding machine.This photoelectric detective circuit 25 is connected with power-supply system 21 by the normally opened contact K that goes out optical relay of light path system 22.Photoelectric detective circuit 25 detects whether operate as normal of light path system 22, and testing result is offered control system 23 and feed system 24.Whether control system 23 carries out welding operation to workpiece according to the testing result control laser-beam welding machine of photoelectric detective circuit 25.Automatic feeding system 24 determines whether that according to the testing result of photoelectric detective circuit 25 continuing that workpiece to be welded is sent to laser-beam welding machine welds.
Wherein photoelectric detective circuit 25 comprises light pick-up circuit 251, optical signal processing circuit 252 and output control circuit 253.Light pick-up circuit 251 detects whether pick up the light that light path system 22 produces, and produces detection signal.This light pick-up circuit 251 can directly adopt photodiode or photo resistance etc.The detection signal of 252 pairs of light pick-up circuits 251 of optical signal processing circuit is handled, convert detection signal the control signal of laser-beam welding machine to, output control circuit 253 exports the control signal of the laser-beam welding machine of optical signal processing circuit 252 to the control system 23 and the feed system 24 of laser-beam welding machine.When light path system 22 operate as normal, when light pick-up circuit 251 picks up the laser of light path system 22 generations, produce light path system detection signal working properly, when light pick-up circuit 251 does not pick up the laser of light path system 22 generations, produce the detection signal of light path system operation irregularity.
In the utility model, know the duty of laser-beam welding machine more intuitively in order to make operating personnel, this photoelectric detective circuit 25 also comprises warning circuit 254, and when light path system was in off working state, warning circuit 254 was reported to the police by the mode of alarm lamp or jingle bell.
The operation principle of above-mentioned laser-beam welding machine is as follows: when laser-beam welding machine is in halted state, light path system 22 go out not adhesive of optical relay, the normally opened contact K that goes out optical relay disconnects, thereby make power-supply system 21 stop to provide power supply to photoelectric detective circuit 25, photoelectric detective circuit 25 quits work.When laser-beam welding machine is in running order, light path system 22 go out the optical relay adhesive, go out the normally opened contact K closure of optical relay, thereby make power-supply system 21 provide power supply by the normally opened contact K that goes out optical relay to photoelectric detective circuit 25, photoelectric detective circuit 25 is started working.
When light path system 22 operate as normal, light pick-up circuit 251 picks up the laser that light path system produces, thereby produce light path system detection signal working properly, and the detection signal that this is working properly with this light path system is processed into the control signal of laser-beam welding machine, and exports the control signal of this laser-beam welding machine to control system 23 and feed system 24 by output control circuit 253.Feed system 24 is delivered to laser-beam welding machine according to the control signal of laser-beam welding machine with workpiece to be welded, and control system 23 is carried out welding operation according to the laser head of the control signal control laser-beam welding machine of laser-beam welding machine to the workpiece that feed system 24 transmits simultaneously.
When light path system 22 appearance are unusual, light pick-up circuit 251 can't detect the laser that light path system produces, thereby produce the detection signal of light path system operation irregularity, and this detection signal with this light path system operation irregularity is processed into the control signal of laser-beam welding machine, and export the control signal of this laser-beam welding machine to control system 23, feed system 24 and warning circuit 16 by output control circuit 253.Feed system 24 stops workpiece to be welded is delivered to laser-beam welding machine according to the control signal of laser-beam welding machine.Control system 23 stops workpiece to be welded is carried out welding operation according to the laser head of the control signal control laser-beam welding machine of laser-beam welding machine.Warning circuit 16 is reported to the police by the mode of alarm lamp or jingle bell according to the control signal of laser-beam welding machine.Like this, when the light path system of laser-beam welding machine occurs when unusual, having avoided not, the workpiece of welding flows into next process.
Fig. 3 shows the circuit theory of photoelectric detective circuit shown in Figure 2, and the power-supply system of this photoelectric detective circuit by the normally opened contact K that goes out optical relay with the laser-beam welding machine of light path system in the laser-beam welding machine (as the voltage source of+12V) is connected.Wherein the light pick-up circuit of photoelectric detective circuit is made of photodiode PD, and this light pick-up circuit also can be made of a photo resistance.In the utility model, for convenience of explanation, be example with the light pick-up circuit that adopts photodiode PD to constitute photoelectric detective circuit, describe.The normally opened contact K that go out optical relay of the end of photodiode PD by light path system is connected with the voltage source of+12V, and the other end of photodiode PD is connected with the optical signal processing circuit of photoelectric detective circuit.Optical signal processing circuit is by the FET Q1 that is connected with photodiode PD, and the relay J that is connected with FET Q1 constitutes.Wherein FET Q1 is a N channel field-effect pipe, and its grid is connected with photodiode PD, and its source electrode is connected with relay J, its grounded drain.The other end of relay J is connected with voltage source by the normally opened contact K that goes out optical relay of light path system.Wherein relay J comprises normally-closed contact J1 and J2, and normally opened contact J3.Wherein the normally opened contact J3 of relay J constitutes the output control circuit of photoelectric detective circuit, and it is connected with feed system with control system (as PLC) respectively.Warning circuit comprises the RC timing circuit of being made up of J1, resistance R, capacitor C at normally closed, and the alarm circuit of being made up of normally-closed contact J2, alarm lamp L, reverse-blocking tetrode thyristor Q2.Wherein resistance R is connected with the voltage source of+12V through the normally-closed contact J1 of the relay J normally opened contact K by going out optical relay, and its other end is by capacitor C ground connection, and the other end of resistance R is connected with the grid of reverse-blocking tetrode thyristor Q2 simultaneously.The minus earth of reverse-blocking tetrode thyristor Q2, the anode of reverse-blocking tetrode thyristor Q2 is connected with alarm lamp L.The normally-closed contact J2 of the other end of alarm lamp L by relay is connected with the voltage source of+12V.
The principle of above-mentioned photoelectric detective circuit is as follows:
When laser-beam welding machine is in halted state, light path system go out not adhesive of optical relay, the normally opened contact K that goes out optical relay disconnects, and the voltage source of+12V can't be powered to photoelectric detective circuit by the normally opened contact K that goes out optical relay, thereby makes photoelectric detective circuit be in off working state.
When laser-beam welding machine is in running order, go out the optical relay adhesive, the normally opened contact K of the voltage source of+12V through going out optical relay powers to photoelectric detective circuit, thereby makes photoelectric detective circuit in running order.
At this moment, when the light path system operate as normal, the surplus light that light path system produces is radiated on the photodiode PD, photodiode PD conducting, the voltage source of+12V makes FET Q1 conducting, the relay J adhesive to the grid power supply of the MOS field effect transistor Q1 that is connected with photodiode PD, the normally-closed contact J1 of relay J and J2 disconnect, the normally opened contact J3 closure of relay J.Because the normally-closed contact J1 of relay J and J2 disconnect, thereby alarm lamp L is not worked.Because the relay J adhesive drives the normally opened contact J3 closure of relay, thereby exports the signal of light path system operate as normal to control system and feed system.After feed system receives light path system signal working properly, transmit workpiece to be welded to laser-beam welding machine.After control system received light path system signal working properly, the laser head of control laser-beam welding machine carried out welding operation to the workpiece that feed system transmits.
When light path system breaks down and stops to produce laser, not conducting of photosensitive secondary light PD, the also not conducting of FET Q1 that its grid is connected with photosensitive secondary light PD, thus make the relay J can not adhesive, the normally-closed contact J1 of relay J and J2 closure, the normally opened contact J3 of relay J disconnects.Because the normally opened contact J3 of relay J disconnects, control system does not receive light path system signal working properly (thinking that promptly control system receives the signal of light path system operation irregularity), thereby the laser head of its control laser-beam welding machine stops workpiece being carried out welding operation, feed system does not receive the signal (thinking that promptly feed system receives the signal of light path system operation irregularity) of light path system operate as normal simultaneously, thereby stops to transmit workpiece to be welded to laser-beam welding machine.Thereby the workpiece of the not welding of avoiding flows into next process.Because the normally-closed contact J1 and the J2 closure of relay J, the voltage source of+12V through the normally-closed contact J1 of relay J behind the RC timing circuit, trigger controllable silicon diode Q2 conducting ,+12V voltage source is powered to alarm lamp L by the normally-closed contact J2 of relay J, reports to the police thereby light alarm lamp L.
Trouble shooting when light path system, during the light path system operate as normal, the surplus light of its generation is radiated on the photodiode PD, photodiode PD conducting, the voltage source of+12V provides voltage to the grid of the MOS field effect transistor Q1 that is connected with photodiode PD, makes FET Q1 conducting, the relay J adhesive, the normally-closed contact J2 of relay J disconnects, and the voltage source of+12V can't be powered to alarm lamp L, thus the alarm operation of contact alarm lamp L.
See also Fig. 1, be the structure of existing laser-beam welding machine.Because the laser weld that the utility model provides is on the basis of existing laser-beam welding machine structure, increased photoelectric detective circuit, and the laser that photoelectric detective circuit mainly utilizes the light path system of laser-beam welding machine to produce comes whether operate as normal of detection laser bonding machine, and when being in abnormality, laser-beam welding machine reports to the police, therefore, this photoelectric detective circuit can be arranged at laser-beam welding machine any one can pick up the position of the laser that light path system produces, as on the half anti-mirror holder of laser-beam welding machine 31 or the mirror holder 35 that is all-trans first-class.
In the utility model, by photoelectric detective circuit being set for laser-beam welding machine, photoelectric detective circuit judges by detecting the laser that whether picks up the laser-beam welding machine generation whether laser-beam welding machine is in abnormality, when laser-beam welding machine is in abnormality, stop to transmit workpiece to be welded, and stop workpiece being carried out welding operation, thereby the workpiece of having avoided not welding flows into next process to laser-beam welding machine, and influence the quality of product, bring economic loss to manufacturing enterprise.When photoelectric detective circuit detects laser-beam welding machine and is in abnormality, report to the police by warning circuit, thereby make operating personnel intuitively find the fault of laser-beam welding machine timely simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1, a kind of photoelectric detective circuit is characterized in that, described photoelectric detective circuit comprises:
Detect light that whether picks up the light path system generation and the light pick-up circuit that produces detection signal;
The detection signal of described smooth pick-up circuit generation is processed into the optical signal processing circuit of the control signal of laser-beam welding machine;
The output control circuit of the control signal output of the laser-beam welding machine that described optical signal processing circuit is obtained.
2, photoelectric detective circuit as claimed in claim 1 is characterized in that, described photoelectric detective circuit also comprises the warning circuit that does not detect the light time warning of light path system generation when described smooth pick-up circuit.
3, photoelectric detective circuit as claimed in claim 1 or 2 is characterized in that, described smooth pick-up circuit can be photodiode or photo resistance.
4, photoelectric detective circuit as claimed in claim 1 or 2 is characterized in that, described optical signal processing circuit comprises the FET that its grid is connected with described smooth pick-up circuit, and the relay that is connected with the drain electrode of described FET.
5, photoelectric detective circuit as claimed in claim 4 is characterized in that, described relay comprises normally opened contact, and the normally opened contact of described relay constitutes described output control circuit.
6, photoelectric detective circuit as claimed in claim 4, it is characterized in that, described relay comprises first normally-closed contact and second normally-closed contact, described warning circuit comprises the timing circuit of being made up of the described first normally closed point, resistance, electric capacity, and the alarm circuit of forming by described second normally-closed contact, alarm lamp, reverse-blocking tetrode thyristor, an end of described resistance is connected with the grid of described reverse-blocking tetrode thyristor.
7, a kind of laser-beam welding machine, comprise the power-supply system that power supply is provided, lasing light path system, the control system of control welding operation and the feed system that transmits workpiece to be welded, it is characterized in that, described laser-beam welding machine also comprises the photoelectric detective circuit that optical relay is connected with described power-supply system that goes out by described light path system, and the output of described photoelectric detective circuit is electrically connected with described control system and feed system.
8, laser-beam welding machine as claimed in claim 7, it is characterized in that, described photoelectric detective circuit comprises whether detection picks up light that light path system produces and the light pick-up circuit that produces detection signal, the detection signal that described smooth pick-up circuit is produced is processed into the optical signal processing circuit of the control signal of laser-beam welding machine, and the output control circuit of the control signal output of the laser-beam welding machine that described optical signal processing circuit is obtained.
9, laser-beam welding machine as claimed in claim 8 is characterized in that, described photoelectric detective circuit also comprises the warning circuit that does not detect the light time warning of light path system generation when described smooth pick-up circuit.
10, laser-beam welding machine as claimed in claim 8 or 9 is characterized in that described smooth pick-up circuit can be photodiode or photo resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820093770 CN201201126Y (en) | 2008-04-30 | 2008-04-30 | Laser-welding apparatus and photo-electric detection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820093770 CN201201126Y (en) | 2008-04-30 | 2008-04-30 | Laser-welding apparatus and photo-electric detection circuit thereof |
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| Publication Number | Publication Date |
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| CN201201126Y true CN201201126Y (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200820093770 Expired - Fee Related CN201201126Y (en) | 2008-04-30 | 2008-04-30 | Laser-welding apparatus and photo-electric detection circuit thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507000A (en) * | 2011-10-10 | 2012-06-20 | 武汉华工激光工程有限责任公司 | Detection circuit for output laser energy of laser welding machine |
| CN107999959A (en) * | 2017-12-29 | 2018-05-08 | 武汉金顿激光科技有限公司 | A kind of hand-held laser welding apparatus and its welding method |
| CN108044245A (en) * | 2017-12-29 | 2018-05-18 | 武汉金顿激光科技有限公司 | A kind of hand-held laser beam drilling equipment |
| CN113102890A (en) * | 2021-04-30 | 2021-07-13 | 深圳市艾雷激光科技有限公司 | Welding method, terminal device and computer-readable storage medium |
-
2008
- 2008-04-30 CN CN 200820093770 patent/CN201201126Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507000A (en) * | 2011-10-10 | 2012-06-20 | 武汉华工激光工程有限责任公司 | Detection circuit for output laser energy of laser welding machine |
| CN102507000B (en) * | 2011-10-10 | 2014-01-08 | 武汉华工激光工程有限责任公司 | Detection circuit for output laser energy of laser welding machine |
| CN107999959A (en) * | 2017-12-29 | 2018-05-08 | 武汉金顿激光科技有限公司 | A kind of hand-held laser welding apparatus and its welding method |
| CN108044245A (en) * | 2017-12-29 | 2018-05-18 | 武汉金顿激光科技有限公司 | A kind of hand-held laser beam drilling equipment |
| CN113102890A (en) * | 2021-04-30 | 2021-07-13 | 深圳市艾雷激光科技有限公司 | Welding method, terminal device and computer-readable storage medium |
| CN113102890B (en) * | 2021-04-30 | 2023-07-25 | 深圳市艾雷激光科技有限公司 | Welding method, terminal device, and computer-readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20160430 |