CN104942436B - Varifocal laser welding apparatus and air blowing protector, air blowing guard method - Google Patents
Varifocal laser welding apparatus and air blowing protector, air blowing guard method Download PDFInfo
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- CN104942436B CN104942436B CN201410127441.8A CN201410127441A CN104942436B CN 104942436 B CN104942436 B CN 104942436B CN 201410127441 A CN201410127441 A CN 201410127441A CN 104942436 B CN104942436 B CN 104942436B
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- laser welding
- varifocal
- varifocal laser
- air blowing
- exhaust pipe
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention is applicable to laser welding technology field, disclose the air blowing guard method of a kind of varifocal laser welding, the air blowing protector of a kind of varifocal laser welding and there is the varifocal laser welding apparatus of this air blowing protector, the air blowing protector of varifocal laser welding is located at the side, amasthenic lens place of varifocal laser welding system for suppressing flue dust and plasma in varifocal laser beam welding to fly upward to side, amasthenic lens place, it includes connecting support, exhaust pipe and for carrying the gas supply assembly of gas in exhaust pipe, exhaust pipe has hollow cavity, air inlet and some steam vents, some steam vents are located on the wall back to varifocal laser welding system of exhaust pipe.The present invention solves the flue dust produced when varifocal laser welding technology is applied to have workpiece (such as the automobile body-in-white sheet metal component etc.) of complex surface structures and plasma to Laser Welding Quality, technical problem that welding efficiency impact is big.
Description
Technical field
The invention belongs to laser welding technology field, particularly relate to the air blowing protection of a kind of varifocal laser welding
Device, air blowing guard method and there is the varifocal laser welding apparatus of this air blowing protector.
Background technology
Laser welding technology is owing to having the advantage of high efficiency, superior performance, so having obtained more and more extensive
Ground application.The volume of smoke that can produce during laser welding and plasma, and due to flue dust and plasma pair
The effect that incident laser has absorption, reflects and scatter, therefore, flue dust and plasma weaken laser projections and arrive
Energy on surface of the work, even can the hot spot of expansion of laser light bundle, thus can make workpiece welding quality,
Welding efficiency all can decline.
In order to avoid flue dust and plasma weaken the laser projections energy to surface of the work, correlation technique people
Member proposes in laser beam welding butt welded seam simultaneously and blows the mode of protective gas and carry out dispelling commissure
Flue dust and plasma, the program typically realizes by the way of installing concentration gas blow pipe by laser spot additional,
And protective gas is typically set to noble gas.This scheme blowing protective gas, fixes and short in laser spot
Focal length solder technology is easily achieved, and preferable welding effect can be obtained；And it is remote to be dfficult to apply to laser
Journey, varifocal (laser focal, variable focal point) weld (such as laser galvanometer remote welding head and variable focal length
The welding of plumb joint) in technology, its main cause is: in welding long-range at laser, varifocal, focus or
Focal length is not fixing, and focus is variable in axial or three dimensions, therefore protection gas blowout loophole position is difficult
To follow the change of focal position of laser.
Therefore, in existing laser remote focal length solder technology, laser galvanometer remote welding head and variable focal length welding
The typically no protection gas system that butt welded seam is set on head, so, entirely without scavenger system in welding process,
Its Laser Welding Quality and welding efficiency are the lowest.And in order to reduce the remote focal length of laser, varifocal solder technology
Middle flue dust and the plasma weakening degree to laser projections energy, person skilled proposes at workpiece
The technical scheme of special scavenger system, this installation in clamping tooling structure are installed in clamping tooling structure
The technical scheme of special scavenger system is easily achieved in workpiece welding relatively simple for structure, and can obtain
Preferably welding effect, but, this special scavenger system installed additional in the clamping tooling structure of workpiece
Motility is the lowest, and is unfavorable on the tool structure of panel beating class workpiece with complex surface structures installing.
Along with the remote focal length of laser, varifocal solder technology are in the welding field of the large-sized sheet materials such as automobile body-in-white
Applying more and more widely, in the remote focal length of laser, varifocal welding process, flue dust and plasma are to Laser Welding
The impact connecing quality and efficiency highlights day by day, especially automobile body-in-white use in a large number galvanized steel plain sheet welding and
Cheng Hou, it is even more serious that the flue dust produced in galvanized steel plain sheet welding process and plasma fly upward phenomenon, so,
Make in the remote focal length of laser, varifocal solder technology entirely without scavenger system welding procedure easily occur weldering
Connect defect, and then the defective products rate welding workpiece is greatly promoted.Simultaneously as automobile body-in-white panel beating
Shape strange, therefore, the tool structure often overlapping automobile body-in-white panel beating installs additional a set of special air blowing system
System, the structure that can make scavenger system is the most complicated, and adds on the tool structure often overlapping automobile body-in-white panel beating
Fill a set of special scavenger system and also there is the defect that cost is high, operability is low, therefore, there is complexity
Scavenger system is installed additional, specifically in the clamping tooling structure of the panel beating class workpiece such as the automobile body-in-white of surface texture
Application is difficult to.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is provided that a kind of varifocal laser welding
Air blowing protector, air blowing guard method and there is the varifocal laser welding apparatus of this air blowing protector,
It aims to solve the problem that the varifocal solder technology of existing laser is applied to the automobile body-in-white etc. with complex surface structures
The flue dust and the plasma that produce during panel beating class workpiece affect big technology to Laser Welding Quality, welding efficiency
Problem.
The technical scheme is that the air blowing protector of a kind of varifocal laser welding, be located at varifocal
The side, amasthenic lens place of laser welding system is for flue dust and plasma in suppression remote laser welding process
Flying upward to side, varifocal laser welding system place, it includes the connection for being connected with varifocal laser welding system
Support, the exhaust pipe that is installed on described connection support and for carrying gas in described exhaust pipe
Gas supply assembly, described exhaust pipe has hollow cavity, air inlet and some steam vents, described air inlet with
Described gas supply assembly connects, described some steam vents be located at described exhaust pipe back to described amasthenic lens
On wall.
Preferably, described air inlet is provided with two, and air inlet described in two is connected in parallel in described gas supply assembly
One end.
As the first specific embodiments of exhaust pipe, described exhaust pipe includes that head and the tail two ends are bonded with each other
Closed ring-type body and one end is arranged on described closed ring-type body, the other end is entering of opening
Trachea, the described opening of described air inlet pipe is described air inlet, and described some steam vents are distributed in described envelope
On the wall back to described amasthenic lens of the ring-type body of enclosed.
As the second specific embodiments of exhaust pipe, described exhaust pipe includes the ring-type body of open type,
The ring-type body of described open type is formed by a body bending cincture, and the head and the tail two ends of this body are bent to two
The straight tube-like being arranged side by side, the head and the tail two ends of described body be respectively provided with towards away from the ring-type body of described open type it
The opening extended centrally out, described opening is described air inlet, and described some steam vents are distributed in institute
State on the wall back to described amasthenic lens of the ring-type body of open type.
As the 3rd specific embodiments of exhaust pipe, described exhaust pipe includes two intervals and be arranged in parallel
Straight tube, described straight tube has opening and blind end, and described opening is described air inlet, described some
Steam vent is distributed on the wall back to described amasthenic lens of described straight tube.
As the first specific embodiments of connection support, described connection support includes rack body and is fixed on
Connecting plate on described exhaust pipe, described rack body offers and wears to connect institute for the first securing member
State the first connecting hole of connecting plate and wear to connect the of described varifocal laser welding system for the second securing member
Two connecting holes, described connecting plate is provided with the 3rd connecting hole worn for described first securing member.
As the second specific embodiments of connection support, described connection support includes rack body, is fixed on
Connecting plate and one end on described exhaust pipe connect described rack body, the other end connects described varifocal sharp
The contiguous block of the mounting rod of flush weld joint, described rack body offers and wears to connect for the first securing member
First connecting hole and confession the 3rd securing member of described connecting plate wear to connect the 4th connection of described contiguous block
Hole, described connecting plate is provided with the 3rd connecting hole worn for described first securing member, described contiguous block sets
There is the 6th connecting hole worn for described 3rd securing member.
Specifically, described gas supply assembly includes source of the gas, conveying gas circuit, flow control valve, described conveying gas circuit
One end be connected with described source of the gas, the other end is connected with described air inlet, and described flow control valve is located at described
In conveying gas circuit.
The air blowing protector of the varifocal laser welding that the present invention provides, being attached by connection support can
Zoom laser welding system, can realize exhaust pipe installation in varifocal laser welding system and fix；By
Air inlet, hollow cavity and the steam vent being interconnected is set on exhaust pipe, can make to carry from gas supply assembly
Gas in exhaust pipe outwards sprays in steam vent, and owing to steam vent is to arrange back to amasthenic lens
, therefore, the flue dust that produces when the air-flow ejected in steam vent can suppress varifocal laser welding and etc. from
Daughter is flown upward towards side, amasthenic lens place, and flue dust and plasma can be forced to scatter to surrounding, effectively subtracts
Little flue dust and the plasma weakening degree to laser projections energy, and then improve varifocal laser welding
Quality and efficiency.The air blowing protector of the sharp varifocal smooth galvanometer welding that the present invention provides, owing to it is used
It is fixedly installed in varifocal laser welding system by connecting support in the exhaust pipe blown, therefore, should
Exhaust pipe can move along with the movement of varifocal laser, uses motility high, and so, it was using
Journey need not considering, the structure of workpiece is the most complicated, so that it has operable during installing and using
Property high, be easily achieved, feature that installation cost is low.
Present invention also offers a kind of varifocal laser welding apparatus, it includes varifocal laser welding system, institute
State varifocal laser welding system include varifocal laser welding system body and be installed on described varifocal laser welding
Horizontal blowning installation on head body, described varifocal laser welding system body has the focusing for laser injection
Camera lens, described varifocal laser welding system is also equipped with the air blowing protection dress of above-mentioned varifocal laser welding
Putting, the air blowing protector of described horizontal blowning installation and described varifocal laser welding is all located at described variable
The side, described amasthenic lens place of burnt laser welding system body.
The varifocal laser welding apparatus that the present invention provides, owing to installing on varifocal laser plumb joint
The air blowing protector of above-mentioned varifocal laser welding, therefore, can be varifocal laser welding system long-range,
Zoom welding effectively provides air blowing protection system, thus the flue dust produced when effectively inhibiting laser welding and
Plasma flies upward towards side, amasthenic lens place, reduces flue dust and plasma to laser projections energy
Weakening degree；Compared to long-range, the zoom welding of the varifocal laser welding system of prior art, in same laser
Under power, long-range, the zoom welding of the varifocal laser welding system of the present invention can obtain bigger weld penetration,
Be effectively increased laser remotely, the quality of zoom welding and efficiency.And owing to it is for the exhaust pipe blown
It is fixedly installed in varifocal laser welding system, therefore, this exhaust pipe can be along with varifocal laser welding
The movement of head and move, use motility high, so, the varifocal laser welding system provided as the present invention is welded
When the equipment of connecing is applied to workpiece (such as the automobile body-in-white sheet metal component etc.) with complex surface structures, blows and protect
Protection unit install and use the structure complexity that can consider workpiece, operability is high, be easily achieved, pacify
Dress low cost, thus it is beneficial to expand the range of product.
Present invention also offers the air blowing guard method of a kind of varifocal laser welding, it uses an air blowing protection
Device ejects vertical air-flow towards beam direction and forms a vertical air-flow territory.
The air blowing guard method of the varifocal laser welding that the present invention provides, vertical air-flow territory can suppress varifocal
During laser welding produce flue dust and plasma fly upward towards side, amasthenic lens place, and can force flue dust and
Plasma scatters to surrounding, effectively reduces flue dust and the plasma weakening degree to laser projections energy,
And then improve quality and the efficiency of varifocal laser welding.
Accompanying drawing explanation
Fig. 1 is the structural representation of the varifocal laser welding apparatus that the embodiment of the present invention one provides；
Fig. 2 is the exhaust pipe of the embodiment of the present invention one offer and the assembling schematic diagram being connected support；
Fig. 3 is the structural representation of the exhaust pipe that the embodiment of the present invention one provides；
Fig. 4 is the air-channel system figure that the exhaust pipe that the embodiment of the present invention one provides forms with gas supply assembly；
Fig. 5 is the operating diagram of the varifocal laser welding apparatus that the embodiment of the present invention one provides；
Fig. 6 is varifocal laser welding apparatus after the air blowing protector removing varifocal laser welding in Fig. 5
Operating diagram;
Fig. 7 is the structural representation of the exhaust pipe that the embodiment of the present invention two provides；
Fig. 8 is the structural representation of the air blowing protector of the varifocal laser welding that the embodiment of the present invention three provides
Figure；
Fig. 9 is the structural representation of the air blowing protector of the varifocal laser welding that the embodiment of the present invention four provides
Figure；
Figure 10 is the close-up schematic view in Fig. 9 at A.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
As shown in Fig. 1～5, the air blowing protector of the varifocal laser welding that the embodiment of the present invention one provides
1a, the side, amasthenic lens 211a place being located at varifocal laser galvanometer plumb joint 2a is varifocal for suppression
In laser beam welding, flue dust and plasma 3a fly upward to side, varifocal laser welding system 2a place, variable
Burnt laser welding specifically refers to the welding focal length of laser in laser beam welding, variable focal point, so, variable
The laser welding scope of burnt laser welding is bigger, and varifocal laser welding system 2a concretely laser galvanometer welds
Joint or varifocal laser welding system, this air blowing protector 1a include for varifocal laser welding system
2a connect connections support 11a, be installed on connection support 11a on exhaust pipe 12a and for aerofluxus
In pipe fitting 12a the gas supply assembly 13a, exhaust pipe 12a of conveying gas have hollow cavity (not shown),
Air inlet 120a and some steam vent 1211a, air inlet 120a is connected with gas supply assembly 13a, some aerofluxuss
Hole 1211a is located on the wall back to amasthenic lens 211a of exhaust pipe 12a, each steam vent 1211a edge
It is the edges of regions distribution setting that spacing is arranged with laser beam 210a.Connect the setting of support 11a, mainly use
Fix, so in realizing exhaust pipe 12a installation on varifocal laser welding system 2a so that exhaustor
Part 12a can move along with the movement of varifocal laser welding system 2a, improves the use of exhaust pipe 12a
Motility, so that the structure that the setting of exhaust pipe 12a need not consider workpiece is the most complicated, it is in peace
Dress use during operability is high, be easily achieved, installation cost is low, and effectively expand the use of product
Scope.The setting of exhaust pipe 12a upper air-vent 1211a, is mainly used in making to carry from gas supply assembly 13a
Gas in exhaust pipe 12a outwards sprays in steam vent 1211a, and owing to steam vent 1211a is
Arrange back to amasthenic lens 211a, therefore, the air-flow ejected in steam vent 1211a can suppress Laser Welding
The flue dust and the plasma 3a that produce when connecing fly upward towards side, amasthenic lens 211a place, and can force flue dust
And plasma 3a scatters to surrounding, effectively reduce flue dust and plasma 3a to laser projections energy
Weakening degree, and then improve quality and the efficiency of laser remote welding.
Specifically, gas supply assembly 13a includes source of the gas 131a, conveying gas circuit 132a and flow control valve 132a,
One end of conveying gas circuit 132a is connected with source of the gas 131a, and the other end is connected with air inlet 120a, Flow-rate adjustment
Valve 132a is located in conveying gas circuit 132a.The setting of conveying gas circuit 132a, can effectively connect source of the gas 131a
With the air inlet 120a of exhaust pipe 12a, for realizing gas from source of the gas 131a lateral exhaust pipe 12a
The conveying of side.The setting of flow control valve 132a in conveying gas circuit 132a, on the one hand can be used for controlling conveying
The logical of gas circuit 132a closes, i.e. flow control valve 132a can use as switch valve；On the other hand scalable is defeated
Supply gas the uninterrupted of gas on the 132a of road, it is ensured that in conveying gas circuit 132a, the gas flow of conveying meets
The aerofluxus demand of exhaust pipe 12a.
Further, as shown in Figure 4, conveying gas circuit 132a is additionally provided with switching control pilot 134a and flow
Monitoring instrument 135a, switching control pilot 134a are located at one end near source of the gas 131a of conveying gas circuit 132a,
Traffic monitoring instrument 135a is located between switching control pilot 134a and flow control valve 132a.Switching control pilot
Pipeline that 134a is mainly used in controlling between source of the gas 131a and conveying gas circuit 132a is logical to be closed, as gas path on-off
Fast control components use.Preferably, switching control pilot 134a is solenoid electric valve, and and laser welding
The electric-control system (not shown) electrical connection of equipment, so, it is simple to improve the control of switching control pilot 134a just
Victory, control accuracy；It is further preferable that switching control pilot 134a is two-way electromagnetic valve.Traffic monitoring instrument
Device 135a electrically connects with electric-control system, and it is mainly used in monitoring the gas flow size flowing through it, defeated to ensure
Supply gas the reliability of gas flow on the 132a of road.The flow working range of traffic monitoring instrument 135a is
Adjustable, and the gas flow size flowing through it on traffic monitoring instrument 135a, can be shown.In concrete application,
After traffic monitoring instrument 135a sets flow working range, when the gas flowing through traffic monitoring instrument 135a
Body flow is not when the flow working range that it sets, then over range flow can be believed by traffic monitoring instrument 135a
Breath feeds back to electric-control system, and is sounded the alarm by electric-control system, to remind staff to investigate pipeline in time
Flow Fault, so can effective guarantee air-channel system run reliability and security reliability.
Further, as shown in Fig. 1～2, in order to improve the company of exhaust pipe 12a and conveying gas circuit 132a
Connect efficiency and removal efficiency, at air inlet 120a, be additionally provided with snap joint 14a.
Specifically, due in exhaust pipe 12a expellant gas be primarily used to form can suppress flue dust and etc.
The air-flow that gas ions 3a is flown upward to varifocal laser welding system 2a side, therefore, by source of the gas 131a to exhaust pipe
The gas of 12a conveying is preferably set to cheap compressed air, and source of the gas 131a concretely stores compressed air
Air accumulator or there is the compressibility of compressor.Compressed air is formed by air compression, its wide material sources,
Low cost, it is easily obtained, therefore, gas is set to compressed air, can beneficially reduce air blowing protector 1a
Use cost in a particular application.Of course, in concrete application, by source of the gas 131a to exhaust pipe 12a
The gas of conveying also can be set to other compressed gas, and such as oxygen, noble gas etc., but it is relatively costly.
Preferably, as shown in Figures 1 to 3, air inlet 120a is provided with two, and two air inlet 120a parallel connections are even
It is connected to the outfan of conveying gas circuit 132a of gas supply assembly 132a.In concrete application, conveying gas circuit 132a can
It is attached two air inlet 120a by three way cock's (not shown) and two points of connecting tube (not shown),
Three joints of three way cock respectively connect conveying the outfan of gas circuit 132a, one end of two points of connecting tubes, two
The other end of point connecting tube connects two air inlet 120a respectively, such that achieve conveying gas circuit 132a with
Two air inlet 120a are connected in parallel.The air-flow being delivered to carry gas circuit 132a outfan from source of the gas 131a exists
The outfan of conveying gas circuit 132a shunts, and two strands of air-flows are respectively to two air inlet 120a conveyings.This
Embodiment, air inlet 120a is provided with two, and gas can be made from the both sides of exhaust pipe 12a to enter exhaust pipe
In 12a, thus the gas ratio being beneficial to ensure in the hollow cavity of exhaust pipe 12a is more uniform, and then ensures
The air-flow ratio discharged in each steam vent 1211a is more uniform.Of coursing, air inlet 120a also can be provided only with
One or be set to three or more than three, and be unfavorable for when air inlet 120a is provided only with one ensureing the row of entrance
The uniformity of gas in trachea part 12a hollow cavity；And air inlet 120a is set to three or more than three, its
It is unfavorable for the connection of each air inlet 120a and conveying gas circuit 132a, thus the raising of link cost can be caused.
Specifically, as shown in Figures 1 to 3, exhaust pipe 12a includes the closed ring that head and the tail two ends are bonded with each other
Shape body 121a and one end are arranged on closed ring-type body 121a, the other end is the air inlet pipe of opening
122a, the opening of air inlet pipe 122a is air inlet 120a, and air inlet pipe 122a is a straight pipe fitting, and enters
One end of trachea 122a can be fixed on closed ring-type body 121a by welding manner, air inlet pipe 122a
Opening stretch out towards the direction at center away from closed ring-type body 121a.Some steam vents
1211a is distributed on the wall back to amasthenic lens 211a of closed ring-type body 121a.Exhaust pipe
12a is provided between amasthenic lens 211a and workpiece, and so, amasthenic lens 211a irradiates to workpiece
Laser beam 210a runs past exhaust pipe 12a, and in the present embodiment, closed ring-type body 121a encloses
The empty circle part formed is mainly in order to dodge laser beam 210a, thus can prevent exhaust pipe 12a
Irradiation to laser beam 210a causes interference.The annular setting of closed ring-type body 121a, also may be used
The vertical air-flow 10a formation one making exhaust pipe 12a eject towards laser beam 210a welding direction is the biggest
Gas field (being equivalent to an annular flow post), i.e. vertical air-flow 10a is along the circumference being surrounded on laser beam 210a
Annular region scope is sprayed, and vertical air-flow 10a spray regime is wide, thus can ensure in varifocal laser welding
When head 2a does not moves, when varifocal laser welding system 2a changes the focus of laser, focal length welding,
The air-flow of exhaust pipe 12a ejection all can form air blowing protective effect to laser beam 210a, thus can make this
The air blowing protector 1a of varifocal laser welding that bright embodiment one provides be particularly suited for laser remotely, become
In burnt welding.The annular of closed ring-type body 121a can be the rule rings such as annular, oval ring, rectangle
Shape；It is alternatively irregular annular, such as the round rectangle arranged for four rounded transition of corner.
Specifically, steam vent 1211a can rounded or oval or rectangle or other polygons or other do not advise
Then shape, as shown in Figures 1 to 3, as a preferred embodiment of the present invention, steam vent 1211a is set to circle
Shape, so, can make steam vent 1211a be relatively easy to processing, thus be beneficial to simplify the processing of steam vent 1211a
Process.
Specifically, as shown in Figures 1 to 3, connect support 11a include rack body 111a and be fixed on aerofluxus
Connecting plate 112a on pipe fitting 12a, rack body 111a offers for the first securing member (not shown)
Wear connect the first connecting hole (not shown) of connecting plate 112a and wear for the second securing member (not shown)
If to connect the second connecting hole (not shown) of varifocal laser welding system 2a, connecting plate 112a is provided with
The 3rd connecting hole 1121a worn for the first securing member, the horizontal blowning installation of varifocal laser welding system 2a
22a is provided with the 5th connecting hole (not shown) worn for the second securing member.First securing member and second tight
Firmware is all preferably set to screw, and so, the second connecting hole and the 3rd connecting hole 1121a all correspondences are preferably set to
Do not have female unthreaded hole, the first connecting hole and the 5th connecting hole all correspondences and be preferably set to have female
Screwed hole.Preferably, the 3rd connecting hole 1121a is set to waist type unthreaded hole, and waist type unthreaded hole refers specifically to mid portion
For the unthreaded hole that rectangular shape, two ends are semicircle arcuation, so, it is used for connecting support 11a body and connecting plate 112a
The screw position that wears in waist type unthreaded hole be scalable, thus can prevent because mismachining tolerance causes connection
Plate 112a and rack body 111a is connected the situation of difficulty and occurs.
More specifically, connecting plate 112a is attached with exhaust pipe 12a by welding manner, due to aerofluxus
The wall ratio of pipe fitting 12a is relatively thin, therefore, use welding manner to be attached exhaust pipe 12a and connecting plate 112a,
It is beneficial to ensure the fastening reliability that exhaust pipe 12a is connected with connecting plate 112a.
Preferably, as shown in Figures 1 to 3, connecting plate 112a is provided with two, and rack body 111a is set to U
Shape pole, it includes intermediate shank portion 1111a and is respectively arranged on the two side lever portions at intermediate shank portion 1111a two ends
1112a, one end away from intermediate shank portion 1111a of two side lever portion 1112a connects two connections by screw respectively
Screw is passed through respectively with varifocal in one end near intermediate shank portion 1111a of plate 112a, two side lever portion 1112a
The horizontal blowning installation 22a of laser welding system 2a connects.Rack body 111a is set to U-shaped pole, is beneficial to
Exhaust pipe 12a bigger with span for rack body 111a is attached, add rack body 111a with
The junction point quantity of exhaust pipe 12a, thus be beneficial to guarantee exhaust pipe 12a and connect with being connected support 11a
Fastening reliability；And intermediate shank portion 1111a and two side lever portion 1112a enclose the intermediate recessed portions of formation,
Can reduce the material usage of rack body 111a, meanwhile, intermediate recessed portions is also available for laser beam 210a and wears
Cross, prevent rack body 111a from laser being irradiated and produce interference.
Further, as in figure 2 it is shown, for the Stability Analysis of Structures reliability improving rack body 111a, both sides
Bar portion 1112a is attached intermediate shank portion 1111a by reinforcement 1113a the most respectively.
The exhaust pipe 12a of above-described embodiment one is to be connected by closed ring-type body 121a and air inlet pipe 122a
Connect, and specifically provide according to the difference of exhaust pipe structure, following example two and embodiment three
Two other embodiment of exhaust pipe (mainly introduce embodiment two, scheme that embodiment three provides with
The difference of the scheme that embodiment one provides, the varifocal laser welding that embodiment two, embodiment three provide
Air blowing protector in setting principle other structures identical with embodiment one setting principle, the most detailed
State):
Specifically, as it is shown in fig. 7, the air blowing of the varifocal laser welding of the embodiment of the present invention two offer is protected
In device, exhaust pipe includes open type ring-type body 121b, and open type ring-type body 121b is by a pipe
Body bending is around forming, and the head and the tail two ends of this body are bent to two straight tube-like being arranged side by side, the head of body
Tail two ends are respectively provided with towards the outward extending opening in center away from open type ring-type body 121b, and opening is i.e.
For air inlet 120b, some steam vent 1211b be distributed in open type ring-type body 121b back to focus lamp
On the wall of head.Open type ring-type body 121b encloses the empty circle part of formation mainly in order to enter laser beam
Row is dodged, thus can prevent exhaust pipe from the irradiation of laser beam is caused interference.The ring-type body of open type
The annular setting of 121b, it is possible to the air-flow making exhaust pipe eject towards LASER BEAM WELDING direction forms one
The biggest gas field (being equivalent to an annular flow post), i.e. vertical air-flow is along the circumference annular being surrounded on laser beam
Regional extent is sprayed, and vertical jet-impingement scope is wide, thus can ensure not move in varifocal laser welding system
When, when varifocal laser welding system changes the focus of laser, focal length welding, exhaust pipe ejection
Air-flow all can form air blowing protective effect to laser beam, thus can make that the embodiment of the present invention two provides varifocal
The air blowing protector of laser welding be particularly suited for laser remotely, in zoom welding.The ring-type body of open type
The annular of 121b can be the rule annulars such as annular, oval ring, rectangle；It is alternatively irregular annular, as
It it is the round rectangle of four corner's rounded transition settings.Compared with above-described embodiment one, in the present embodiment
Constitute exhaust pipe for open type ring-type body 121b, so-called open type ring-type body 121b, refer to bending
The head and the tail two ends of the body forming open type ring-type body 121b are not engaged and are integrated, the most side by side
Arrange, and the head and the tail two ends of body are as the air inlet 120b being connected with conveying gas circuit of exhaust pipe, and not
Air inlet pipe need to be additionally set.
Specifically, as shown in Figure 8, the air blowing protection of the varifocal laser welding that the embodiment of the present invention three provides
In device, exhaust pipe includes two intervals and the straight tube 121c be arrangeding in parallel, and straight tube 121c has opening
And blind end, opening is air inlet 120c, some steam vent 1211c be distributed in straight tube 121c back to
On the wall of amasthenic lens.The interval of two straight tube 121c is arranged, primarily to formed in order to laser beam
210c carries out the space dodged, thus can prevent exhaust pipe from the irradiation of laser beam 210c causing interference existing
As.The interval of two straight tube 121c is arranged, it is possible to make the gas that exhaust pipe ejects towards LASER BEAM WELDING direction
Stream forms a gas field the biggest, and i.e. vertical air-flow 10a sprays along the big regional extent in both sides of laser beam 210a,
Vertical air-flow 10a spray regime is wide, thus can ensure when varifocal laser welding system is not moved,
When varifocal laser welding system changes the focus of laser, focal length welding, the air-flow of exhaust pipe ejection all can be right
Laser beam forms air blowing protective effect, thus can make the varifocal laser welding that the embodiment of the present invention two provides
Air blowing protector be particularly suited for laser remotely, in zoom welding.With above-described embodiment one, embodiment two
Comparing, that constitute exhaust pipe in the present embodiment is the straight tube 121c of two spaced and parallel settings, its exhaust pipe
In the course of processing and be not required to bending arrange, simplify the course of processing of exhaust pipe.
The connection support of above-described embodiment one, embodiment two and embodiment three is all by connecting plate and rack body
Constitute, and be all directly to be connected with the horizontal blowning installation of varifocal laser welding system by rack body,
And according to the difference of connection mounting structure, following example four specifically provide and connect the another one of support in fact
(scheme that mainly introducing embodiment four provides carries with embodiment one, embodiment two and embodiment three to execute example
The difference of the scheme of confession, is arranged in the air blowing protector of the varifocal laser welding that embodiment four provides
Other structures that principle is identical with embodiment one, embodiment two and embodiment three setting principle, the most detailed
State):
Specifically, as shown in Fig. 9～10, the air blowing of the varifocal laser welding that the embodiment of the present invention four provides
In protection device, connect the connecting plate 112d that support includes rack body 111d, is fixed on exhaust pipe 12d
The company of the mounting rod 212d of rack body 111d, the other end varifocal laser welding system of connection is connected with one end
Meet block 113d, rack body 111d offers and wears with connection for the first securing member (not shown)
First connecting hole (not shown) and confession the 3rd securing member (not shown) of plate 112d wear to connect contiguous block
The 4th connecting hole (not shown) of 113d.Connecting plate 112d is provided with the 3rd worn for the first securing member
Connecting hole (not shown), contiguous block 113d is provided with the 6th connecting hole worn for the 3rd securing member (to scheme not
Show).First securing member and the 3rd securing member are all preferably set to screw, and so, the 3rd connecting hole and the 4th is even
Connecing hole all correspondences and be preferably set to do not have female unthreaded hole, the first connecting hole and the 6th connecting hole are the most corresponding excellent
Choosing is set to have female screwed hole.Preferably, the 3rd connecting hole is set to waist type unthreaded hole, and waist type unthreaded hole has
Body refer to mid portion be rectangular shape, two ends be the unthreaded hole of semicircle arcuation, so, be used for connecting rack body 111d
Being scalable with the screw of the connecting plate 112d position that wears in waist type unthreaded hole, so, can preventing because adding
The situation that work error causes connecting plate 112d and rack body 111d to be connected difficulty occurs.With above-described embodiment
One, embodiment two is compared with embodiment three, has constituted more than in the parts connecting support contiguous block in the present embodiment
113d, and contiguous block 113d is for connecting the mounting rod of rack body 111d and varifocal laser welding system
212d.The present embodiment is primarily directed to the different structure optimal design-aside of the varifocal laser welding system of different model,
The i.e. support that connects of the present embodiment is primarily directed to have the varifocal laser welding system setting of mounting rod 212d
, thus the scope of application of the air blowing protector of varifocal laser welding system remote welding can be expanded.So,
In concrete application, the connection support that can change the outfit different according to different varifocal laser welding system, easy to use.
More specifically, as shown in Fig. 9～10, contiguous block 113d offers and supplies mounting rod 212d to wear
Axis hole (not shown), towards described axis hole place on the end face away from rack body 111d of contiguous block 113d
The direction of side offers the open slot 1131d connected with axis hole, and open slot 1131d is by upper fixture block portion 1132d
Surrounding with lower fixture block portion 1133d, upper fixture block portion 1132d and lower fixture block portion 1133d is connected by screw, on
The connecting hole (not shown) worn for screw it is equipped with on fixture block portion 1132d and lower fixture block portion 1133d.Open
The setting of mouth groove 1131d, can make fixture block portion 1132d and lower fixture block portion 1133d have certain elasticity,
So, fixture block portion 1132d and lower fixture block portion 1133d can be made to have certain floating space, thus can give
Mounting rod 212d penetrating and extracting in axis hole offers convenience, and then is beneficial to improve contiguous block 113d and peace
The dismounting efficiency of dress bar 212d.Upper fixture block portion 1132d and lower fixture block portion 1133d is connected by screw, so,
Can effectively limit the gap length between fixture block portion 1132d and lower fixture block portion 1133d, thus peace can be ensured
The fastening reliability that dress bar 212d installs in axis hole.
Preferably, as shown in Fig. 9～10, connecting plate 112d is provided with two, and contiguous block 113d also is provided with two
Individual, rack body 111d correspondence is preferably set to U-shaped pole, and connecting plate 112d preferably passes through welding manner
Being attached with exhaust pipe 12d, U-shaped pole includes intermediate shank portion (not shown) and is respectively arranged on centre
The two side lever portion (not shown) at two ends, bar portion, the one end away from intermediate shank portion in two side lever portions passes through spiral shell respectively
Silk connects two connecting plate 112d, and the one end near intermediate shank portion in two side lever portions is connected by screw and two respectively
Block 113d connects, and two side lever portions are attached intermediate shank portion by reinforcement (not shown) the most respectively.Herein,
Connecting plate 112d is connected the embodiment one of support, embodiment with the setting principle of rack body 111d with above-mentioned
Two is identical with the setting principle of rack body 111d with connecting plate 112d in embodiment three, is not described in detail in this.
Further, as shown in Fig. 1, Fig. 5 and Fig. 6, the embodiment of the present invention one additionally provides a kind of variable
Burnt laser welding apparatus, it includes varifocal laser welding system 2a, and varifocal laser welding system 2a includes can
Zoom laser welding system body 21a, optical fiber 23a and be installed on varifocal laser welding system body 21a
Laterally blowning installation 22a, horizontal blowning installation 22a can be installed on varifocal laser welding system originally by screw
On body 21a, varifocal laser welding system body 21a has the amasthenic lens 211a for laser injection, variable
The air blowing protector 1a of above-mentioned varifocal laser welding it is also equipped with, laterally on burnt laser welding system 2a
The air blowing protector 1a of blowning installation 22a and varifocal laser welding is all located at varifocal laser welding system originally
The side, amasthenic lens 211a place of body 21a, the connection support 11a of air blowing protector 1a is especially by spiral shell
Silk is installed on horizontal blowning installation 22a.Laterally blowning installation 22a is mainly used in along vertical beam of light 210a
Direction blowout crossflow 220a, its blowout gas be preferably cheap compressed air.Concrete welding
During, amasthenic lens 211a can eject laser beam 210a towards workpiece, and horizontal blowning installation 22a can
Direction along vertical beam of light 210a blows out crossflow 220a, and this crossflow 220a is directly by trachea
The mouth of pipe blows out, and air-flow is relatively big, therefore, this crossflow 220a can by welding process to varifocal laser welding
Head body 21a spatters the welding slag flown and blows off, thus can prevent high temperature welding slag from getting to varifocal laser welding system body
On 21a, serve the effect effectively protecting varifocal laser welding system body 21a；And varifocal Laser Welding
The air blowing protector 1a connect can blow out vertical air-flow 10a along the direction parallel with laser beam 210a, and this erects
Can disperse, along laser direction of illumination, flue dust and the plasma 3a that welding process produces to air-flow 10a, effectively press down
Made laser remotely, zoom welding time the flue dust that produces and plasma 3a towards amasthenic lens 211a place
Side is flown upward, and reduces flue dust and the plasma 3a weakening degree to laser projections energy.Compared to existing skill
Long-range, the zoom welding of art varifocal laser welding system 2a, the present embodiment is due in varifocal laser welding system
Above-mentioned air blowing protector 1a has been installed additional on 2a, therefore, under same laser power, the present embodiment variable
Long-range, the zoom welding of burnt laser welding system 2a can obtain bigger weld penetration, are effectively increased laser remote
The quality of journey, zoom welding and efficiency.Owing to exhaust pipe 12a sprays towards laser beam 210a welding direction
The air-flow gone out can form a gas field the biggest, thus can ensure not move at varifocal laser welding system 2a
Under situation, when varifocal laser welding system 2a changes the focus of laser, focal length welding, exhaust pipe 12a sprays
The air-flow gone out all can form air blowing protective effect to laser beam 210a, thus can make the embodiment of the present invention one offer
The air blowing protector 1a of varifocal laser welding be particularly suited for laser remotely, in zoom welding.And by
It is fixedly installed in varifocal laser welding system 2a for the exhaust pipe 12a blown in it, therefore, should
Exhaust pipe 12a can move, blowing of varifocal laser welding along with the movement of varifocal laser welding system 2a
Gas shielded device 1a uses motility high, so, when the varifocal laser welding apparatus application that the present invention provides
When welding has the panel beating class workpiece such as body of a motor car of complex surface structures, the installation of air blowing protector 1a
Use can consider the structure complexity of workpiece, and operability is high, be easily achieved, installation cost is low, from
And be beneficial to expand the range of product, and ensure that quality and the welding efficiency of remote welding.
Further, the embodiment of the present invention one additionally provides the air blowing guard method of a kind of varifocal laser welding,
It uses an air blowing protector eject the vertical vertical air-flow of air-flow 10a towards beam direction and form one
Individual vertical air-flow territory, vertical air-flow territory is specially the vertical air-flow 10a certain area along laser beam 210a circumference
In the range of spray.The air blowing guard method of the varifocal laser welding that the present invention provides, can suppress varifocal and swash
The flue dust and the plasma that produce during photocoagulation fly upward towards side, amasthenic lens 211a place, and can force flue dust
And plasma scatters to surrounding, effectively reduce flue dust and the plasma weakening journey to laser projections energy
Degree, and then improve quality and the efficiency of varifocal laser welding.The present embodiment, air blowing protector is preferred
Air blowing protector 1a for above-mentioned varifocal laser welding.
Further, the air blowing guard method of the varifocal laser welding that the embodiment of the present invention one provides, also
Above-mentioned horizontal blowning installation blowout is used to be perpendicular to the crossflow 220a of beam direction.Crossflow
The common effect of 220a and vertical air-flow 10a, on the one hand can improve varifocal laser welding system body 21a
The protected effect of amasthenic lens 211a, on the other hand can inhibit laser remotely, zoom welding time produce
Flue dust and plasma 3a fly upward towards side, amasthenic lens 211a place, reduce flue dust and plasma 3a
Weakening degree to laser projections energy, improves quality and the efficiency of varifocal laser welding.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent or the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (10)
1. an air blowing protector for varifocal laser welding, is located at the focus lamp of varifocal laser welding system
Head side, place is for suppressing in varifocal laser beam welding flue dust and plasma to varifocal laser welding
Head side, place fly upward, it is characterised in that: include the connection support for being connected with varifocal laser welding system,
It is installed on the exhaust pipe on described connection support and for carrying the supply group of gas in described exhaust pipe
Part, described exhaust pipe has hollow cavity, air inlet and some steam vents, described air inlet and described confession
Pneumatic module connects, and described some steam vents are located on the wall back to described amasthenic lens of described exhaust pipe.
The air blowing protector of varifocal laser welding the most as claimed in claim 1, it is characterised in that: institute
State air inlet and be provided with two, and air inlet described in two is connected in parallel in one end of described gas supply assembly.
The air blowing protector of varifocal laser welding the most as claimed in claim 2, it is characterised in that: institute
State exhaust pipe and include that the head and the tail closed ring-type body that is bonded with each other of two ends and one end are arranged in described closed
On ring-type body, the other end be the air inlet pipe of opening, the described opening of described air inlet pipe is described air inlet
Mouthful, described some steam vents are distributed on the wall back to described amasthenic lens of described closed ring-type body.
The air blowing protector of varifocal laser welding the most as claimed in claim 2, it is characterised in that: institute
Stating exhaust pipe and include the ring-type body of open type, the ring-type body of described open type is by a body bending cincture
Becoming, and the head and the tail two ends of this body are bent to two straight tube-like being arranged side by side, the head and the tail two ends of described body are equal
Having towards away from the outward extending opening of the heart among the ring-type body of described open type, described opening is described
Air inlet, described some steam vents are distributed in the wall back to described amasthenic lens of the ring-type body of described open type
On face.
The air blowing protector of varifocal laser welding the most as claimed in claim 2, it is characterised in that: institute
Stating exhaust pipe and include two intervals and the straight tube be arrangeding in parallel, described straight tube has opening and blind end, institute
Stating opening is described air inlet, described some steam vents be distributed in described straight tube back to described amasthenic lens
Wall on.
6. the air blowing protector of the varifocal laser welding as described in any one of claim 1 to 5, it is special
Levy and be: described connection support includes rack body and the connecting plate being fixed on described exhaust pipe, described
Offer on rack body and wear to connect the first connecting hole of described connecting plate and for second for the first securing member
Securing member wears to connect the second connecting hole of described varifocal laser welding system, and described connecting plate is provided with confession
The 3rd connecting hole that described first securing member wears.
7. the air blowing protector of the varifocal laser welding as described in any one of claim 1 to 5, it is special
Levy and be: described connection support includes rack body, the connecting plate being fixed on described exhaust pipe and one end
Connect the contiguous block of the mounting rod of described rack body, the other end described varifocal laser welding system of connection, institute
State to offer on rack body and wear to connect the first connecting hole of described connecting plate and for for the first securing member
Three securing members wear to connect the 4th connecting hole of described contiguous block, and described connecting plate is provided with for described first
The 3rd connecting hole that securing member wears, described contiguous block is provided with supply described 3rd securing member to wear the 6th even
Connect hole.
8. the air blowing protector of the varifocal laser welding as described in any one of claim 1 to 5, it is special
Levy and be: described gas supply assembly includes source of the gas, conveying gas circuit and flow control valve, the one of described conveying gas circuit
End is connected with described source of the gas, and the other end is connected with described air inlet, and described conveying is located at by described flow control valve
In gas circuit.
9. a varifocal laser welding apparatus, including varifocal laser welding system, described varifocal Laser Welding
It is horizontal be installed on described varifocal laser welding system body that joint includes varifocal laser welding system body
Blowning installation, described varifocal laser welding system body has the amasthenic lens for laser injection, and its feature exists
In: be also equipped with in described varifocal laser welding system described in any one of claim 1 to 8 varifocal swash
The air blowing protector of photocoagulation, the air blowing protection of described horizontal blowning installation and described varifocal laser welding
Device is all located at the side, described amasthenic lens place of described varifocal laser welding system body.
10. the air blowing guard method of a varifocal laser welding, it is characterised in that: use such as claim
The air blowing protector of the varifocal laser welding described in 1 to 8 any one ejects perpendicular towards beam direction
To air-flow and form a vertical air-flow territory.
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| CN201410127441.8A CN104942436B (en) | 2014-03-31 | 2014-03-31 | Varifocal laser welding apparatus and air blowing protector, air blowing guard method |
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| CN201410127441.8A CN104942436B (en) | 2014-03-31 | 2014-03-31 | Varifocal laser welding apparatus and air blowing protector, air blowing guard method |
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| CN104942436B true CN104942436B (en) | 2017-01-04 |
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