CN100519047C - Laser welding device and laser welding method - Google Patents
Laser welding device and laser welding method Download PDFInfo
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- CN100519047C CN100519047C CNB2005101269548A CN200510126954A CN100519047C CN 100519047 C CN100519047 C CN 100519047C CN B2005101269548 A CNB2005101269548 A CN B2005101269548A CN 200510126954 A CN200510126954 A CN 200510126954A CN 100519047 C CN100519047 C CN 100519047C
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Abstract
An apparatus and a method of laser welding by which laser welding can be carried out for a workpiece with excellent heat balance without delaying welding work. A laser welding apparatus for carrying out welding by irradiating laser beams on a plurality of workpieces comprises a laser beam irradiating means for irradiating the laser beam at a required period of a pulse, and an irradiating position changing means for changing the position of the workpiece irradiated with the laser beam. The irradiating position changing means changes the position irradiated with the laser beam so that the continuous irradiation of the laser beam is carried out for a different workpiece, in other words, the same workpiece is not successively irradiated with the laser beam. By this method, the number of irradiation of the laser beams per unit time on the same workpiece can be reduced. As a result, the laser welding apparatus can carry out welding for the workpiece with excellent heat balance. Further, because the number of the irradiation on the same workpiece is reduced without lengthening the period of the pulse of the laser beam, and the reduced irradiation is used to irradiate other workpieces, a time necessary for the welding work is not prolonged.
Description
Technical field
The present invention relates to a kind of laser soldering device and method for laser welding by the workpiece illuminating laser beam is welded
Background technology
In the past, for example in the seal of vessel of light device element (light デ バ イ ス sub-prime) or hydrogen oscillator (water element shake Move) etc., by lid (rid) illuminating laser beam is come relative container welding lid (laser weld just).
For example, in patent documentation 1, record following technology: when the battery case that inside is contained generating element etc. and loam cake carry out laser weld, by making each mobile ormal weight of workbench and the illuminating laser beam that is equipped with workpiece (battery case and loam cake), and battery case and loam cake are sealed.In addition, in patent documentation 2, record following technology: a plurality of workpiece of configuration on workbench, for a workpiece, control galvanometer mirrors etc. are to change the position of illuminating laser beam, thereby weld, after finishing for the welding operation of a workpiece, shift to next workpiece and carry out welding operation.
In the technology of above-mentioned patent documentation record, with pulse period (for example 0.005 second) of regulation to the workpiece illuminating laser beam, make moving ormal weight by the pulse cycle and weld in the position of a workpiece illuminating laser beam.Particularly, mobile slight distance, make last time irradiation position and next irradiation position understand some coincidence.For a workpiece, because the distance of position that can mobile illuminating laser beam between the pulse period is restricted, thereby, weld the required operating time and shorten a workpiece by shortening the time required before next irradiation position moves, just passing through the chopped pulse cycle.
Yet, when welding with above-mentioned method in order to shorten the operating time, for a workpiece, can be to a roughly the same position short time concentrated area illuminating laser beam, thereby, may have the temperature or the more cataclysmal situation of the Temperature Distribution on the workpiece of workpiece itself according to (in proper order) difference in period that laser beam shines.Thereby may produce the situation as inferior failure welding: for example in the position of welding operation initial stage illuminating laser beam, workpiece is fusing fully, in the position of the ending phase illuminating laser beam of welding operation, and the workpiece superfusion.
On the other hand,, can tackle the problems referred to above by correspondingly changing laser power with order to the workpiece illuminating laser beam, but this moment owing to change laser power thereby need carry out the power subsystem transformation, perhaps carry out complicated control etc.
Summary of the invention
The problem that the present invention need solve is above-mentioned situation about enumerating as an example.The objective of the invention is to, a kind of laser soldering device and method for laser welding are provided, can not postpone the operating time, and thermal balance is carried out laser weld to workpiece well.
In technical scheme 1 described invention, a kind of laser soldering device, a plurality of workpiece illuminating laser beams are welded, it is characterized in that, comprise: penetrate the laser beam injection unit of above-mentioned laser beam and change the irradiation position that above-mentioned workpiece is shone the position of above-mentioned laser beam with the pulse period of regulation and change the unit, above-mentioned irradiation position changes the position that the unit changes the above-mentioned laser beam of irradiation, in the continuous above-mentioned pulse period different workpiece is shone above-mentioned laser beam.
In the invention shown in the technical scheme 5, a kind of method for laser welding, a plurality of workpiece illuminating laser beams are welded, it is characterized in that, comprise: the laser beam that penetrates above-mentioned laser beam with the pulse period of regulation penetrates operation and changes the irradiation position change operation of above-mentioned workpiece being shone the position of above-mentioned laser beam, change in the operation at above-mentioned irradiation position, change the position of the above-mentioned laser beam of irradiation, in the continuous above-mentioned pulse period, different workpiece is shone above-mentioned laser beam.
Description of drawings
Fig. 1 is the block diagram that the summary of expression laser soldering device constitutes.
Fig. 2 is the perspective view that the summary of expression workpiece constitutes.
Fig. 3 is the figure that the summary of expression laser beam ejecting device constitutes.
Fig. 4 is the figure of the method for laser welding of the general method for laser welding of expression.
Fig. 5 is the figure of an example of the method for laser welding of the expression embodiment of the invention.
Fig. 6 is the figure of an example of the method for laser welding of the expression embodiment of the invention.
Fig. 7 is the figure of an example of the method for laser welding of the expression embodiment of the invention.
The specific embodiment
In preferred implementation of the present invention, the laser soldering device that a plurality of workpiece illuminating laser beams are welded, comprise: penetrate the laser beam injection unit of above-mentioned laser beam and change irradiation modifier with the cycle of regulation the position of above-mentioned workpiece illuminating laser beam, above-mentioned irradiation position changes the unit, change the position of the above-mentioned laser beam of irradiation, change the position of the above-mentioned laser beam of irradiation, in the continuous above-mentioned pulse period, different workpiece is shone above-mentioned laser beam.
Above-mentioned laser soldering device for example is suitable for when the container that contains quartzy equipment etc. and lid are welded.Laser soldering device has the laser beam injection unit that penetrates above-mentioned laser beam with the pulse period of regulation, by a plurality of workpiece illuminating laser beams are welded.Specifically, laser soldering device, by irradiation position change the unit in accordance with regulations the pulse period change the position of illuminating laser beam, simultaneously by the workpiece illuminating laser beam is welded.At this moment, irradiation position changes the unit, changes the position of illuminating laser beam, in the continuous above-mentioned pulse period different workpiece is shone above-mentioned laser beam, just not to same workpiece illuminating laser beam continuously.That is, irradiation position changes the unit, by the pulse period that makes laser beam to different workpiece illuminating laser beams.Thus, the number of times to a workpiece illuminating laser beam in the unit interval reduces, thereby can utilize laser beam to make the temperature of workpiece rise to the temperature that produces suitable fusion effectively, and can prevent that the temperature of workpiece from rising to the high temperature that produces excessive fusion.Just, can weld well workpiece thermal balance according to above-mentioned laser soldering device.
And, in above-mentioned laser soldering device, do not prolong the pulse period of laser beam and reduce in the unit interval the number of times of a workpiece illuminating laser beam, the part of the irradiation number of times of this minimizing is used for other workpiece are shone, thereby can finish the welding operation of a plurality of relatively workpiece.Thereby above-mentioned laser soldering device can not postpone to weld the needed time and welds reliably.
In an embodiment of above-mentioned laser soldering device, above-mentioned irradiation position changes the unit, a workpiece is shone above-mentioned laser beam, then the workpiece to a plurality of specified quantities different with an above-mentioned workpiece shines above-mentioned laser beam, then a more above-mentioned workpiece is shone above-mentioned laser beam, change the position of the above-mentioned laser beam of irradiation in this way.
In this embodiment, laser soldering device can carry out following operation: behind a workpiece illuminating laser beam, then to other workpiece illuminating laser beam, after the workpiece illuminating laser beam of specified quantity finished, return workpiece illuminating laser beam once more to illuminating laser beam last time.Therefore laser soldering device can carry out welding operation to a plurality of workpiece efficiently simultaneously, compares with the formation of after the welding operation that finishes a workpiece next workpiece being carried out the comparative example of welding operation, and the needed time of welding operation is constant.
In another embodiment of above-mentioned laser soldering device, above-mentioned irradiation position changes the unit, the position of the above-mentioned laser beam of change irradiation, and with in a workpiece, the next laser beam of tight irradiation nearby in the position of shining above-mentioned laser beam.
In this embodiment, laser soldering device behind the different workpiece of irradiation, returns when shining workpiece once more, the tightly illuminating laser beam nearby in the position of shining laser beam.The heat that the laser beam irradiation can be produced is conducted effectively to the irradiation position periphery thus.
In a preference, above-mentioned irradiation position changes the unit and can be made of the galvanometer mirror.Thus, can precision well and promptly change position to the workpiece illuminating laser beam.
In other embodiment of the present invention, the method for laser welding that a plurality of workpiece illuminating laser beams are welded, comprise that the laser beam that penetrates above-mentioned laser beam with the pulse period of regulation penetrates operation and the irradiation position that changes the position of above-mentioned workpiece illuminating laser beam changes operation, change in the operation at above-mentioned irradiation position, change the position of the above-mentioned laser beam of irradiation, in the continuous above-mentioned pulse period, different workpiece is shone above-mentioned laser beam.According to above-mentioned method for laser welding, also can not postpone the needed time of welding operation and thermal balance is welded workpiece well.
Embodiment
Followingly the preferred embodiments of the present invention are described with reference to accompanying drawing.
(formation of laser soldering device)
At first use Fig. 1 to describe to the summary formation of laser soldering device 100 of the present invention.
Fig. 1 is the figure that the summary of expression laser soldering device 100 constitutes.Laser soldering device 100 mainly comprises laser beam ejecting device 1, controller 2 and workbench 3.Laser soldering device is the device that the workpiece 10 that is configured on the workbench 3 is welded.
At this, use Fig. 2 that the basic comprising of workpiece 10 is described.Fig. 2 is the perspective view of an example of expression workpiece 10.Workpiece 10 is included in container 10b and the lid 10a that quartzy equipment 10c (for example quartz (controlled) oscillator or quartz filter) etc. is accommodated in inside.For workpiece 10, at first make and cover that direction that 10a represents along arrow B moves on the top of container 10b and the operation that is configured, lid 10a can use materials such as pottery or metal, and container 10b can use materials such as pottery.
Return Fig. 1, laser soldering device 100 formations are described.1 pair of workpiece of laser beam ejecting device, 10 outgoing laser beam LB.Laser beam ejecting device 1 welds by the lid 10a illuminating laser beam LB to workpiece 10.Specifically, laser beam ejecting device 1 by illuminating laser beam LB on lid 10a, welds covering formation light beam spot on the 10a.And laser beam ejecting device 1 makes laser beam LB vibration, correspondence make laser beam LB vibration with pulse period of regulation at every turn, changes the position of laser beam LB irradiation on lid 10a.Thus can be on all positions that lid will weld on the 10a illuminating laser beam LB, thereby fully seal cover 10a and container 10b and form airtight container.
In Fig. 1, for convenience of description, to have expressed one, but in fact on workbench 3, disposed a plurality of workpiece 10 as 10 of the workpiece of welding object, laser soldering device 100 carries out welding operation to these a plurality of workpiece 10.
(formation of laser beam ejecting device)
Then use Fig. 3 that the concrete formation of laser beam ejecting device 1 is described.Fig. 3 represents the perspective view of laser beam ejecting device 1.
Laser beam ejecting device 1 mainly comprises laser oscillator L, optical beam expander BE, galvanometer mirror GM1, GM2, drive unit 4,5 and f θ lens 6.Laser beam ejecting device 1 works as the laser beam injection unit.
Laser oscillator L makes laser beam LB vibration with the pulse period of regulation, to optical beam expander BE outgoing laser beam LB.Optical beam expander BE adjusts the diameter of laser beam LB etc., and galvanometer mirror GM1 is penetrated adjusted laser beam LB.
Galvanometer mirror GM1 utilizes drive unit 4 to rotate to the direction shown in the arrow R1, changes the direction of reflection lasering beam LB.By galvanometer mirror GM1 laser light reflected bundle LB incident galvanometer mirror GM2.Galvanometer mirror GM2 utilizes drive unit 5 to rotate to the direction shown in the arrow R2, changes the direction of reflection lasering beam LB.By galvanometer mirror GM2 laser light reflected bundle LB incident f θ lens 6, like this, galvanometer mirror GM1, GM2 are partial to control to the light beam LB of incident.And, as mentioned above, by galvanometer mirror GM1 and galvanometer mirror GM2 being rotated change the position of laser beam LB incident f θ lens 6.In addition, drive unit 4,5 is controlled by the control signal S that is provided by controller 2.
F θ lens 6 face of lid 10a relatively vertically shine the laser beam LB of incident.Just the incidence angle of f θ lens 6 and laser beam LB irrespectively, from the position of incident along direction outgoing laser beam LB perpendicular to the face of lid 10a.Particularly, as shown in Figure 3, f θ lens 6 penetrate the laser beam LB1～LB3 perpendicular to the face of lid 10a.As mentioned above, when galvanometer mirror GM1 and galvanometer mirror GM2 are rotated, change the position of laser beam LB incident f θ lens 6.Therefore, by control galvanometer mirror GM1 and galvanometer mirror GM2, the position that laser beam LB shines on lid 10a also changes.For example by fixing galvanometer mirror GM2 and galvanometer mirror GM1 is rotated, at the irradiation position of the laser beam LB of lid on the 10a to folk prescription to moving, by fixing galvanometer mirror GM1 and galvanometer mirror GM2 is rotated, the irradiation position of laser beam LB on the lid 10a moves to the direction perpendicular to above-mentioned direction, like this, controller 2 is by control galvanometer mirror GM1, GM2, as the irradiation position change unit that changes the irradiation position that cover the laser beam LB on the 10a and work.
Then, use illuminating laser beam LB on Fig. 4 subtend workpiece 10 and the general method for laser welding that welds describes.Fig. 4 (a) and (b) are represented the vertical view (figure that observes from top) of the lid 10a of workpiece 10.
Fig. 4 (a) is illustrated in the order of illuminating laser beam LB on workpiece 10 in the general method for laser welding.On the lid 10a of workpiece 10, irradiation forms light beam spot SP by the laser beam LB that penetrates in the laser beam ejecting device 1.At this moment, laser beam ejecting device 1 makes laser beam LB vibration with the cycle of regulation, makes the position of illuminating laser beam LB move ormal weight by the pulse cycle at every turn.Particularly, rotate, change the irradiation position of the laser beam LB that covers on the 10a by making galvanometer mirror GM1, GM2 in the laser beam ejecting device 1.Specifically, laser beam ejecting device 1 so that the mode that the part of adjacent light beam spot SP overlaps to lid 10a illuminating laser beam LB.At this moment, laser beam ejecting device 1 at first in position shown in the lower-left of Fig. 4 (a) to lid 10a illuminating laser beam LB, shown in arrow E 1～E4, continuously change irradiation position in the counterclockwise direction from this position and this 10a and container 10b welded.
In Fig. 4, following laser beam ejecting device 1 is set.Laser beam ejecting device 1 is at (just on lid 10a with the inboard of the part of the peristome side edge of container 10b) illuminating laser beam LB on the trim line of the square area of the vertical 2mm * horizontal 2mm of lid on the 10a.And the pulse period of laser beam LB is 0.002 second (s), and light beam spot (beam spot) SP is spaced apart 0.1mm, and shining in always counting of 10a of lid is 80.The above-mentioned pulse period is shorter, and in other words, the umber of pulse of vibration is bigger in the unit interval.
The figure of one example of the fusing situation of the lid 10a the when welding that Fig. 4 (b) expression is carried out workpiece 10 according to the setting of irradiation sequence shown in Fig. 4 (a) and above-mentioned laser beam ejecting device 1 finishes.Part shown in the hacures represents to cover the zone of 10a fusing.Dashed region A1 is the part of welding operation initial stage illuminating laser beam LB, and dashed region A2 is the part of the intermediate range illuminating laser beam LB of welding operation, and dashed region A3 is the part of the ending phase illuminating laser beam LB of welding operation.Particularly, dashed region A1 regional little than dashed region A2 fusing as can be known, dashed region A3 is than the zone of dashed region A2 fusing greatly.At this moment, in dashed region A2, lid 10a moderately melts, and in dashed region A1, lid 10a is fusing fully not, in dashed region A3, and lid 10a superfusion.Therefore, in dashed region A1, the weld strength of lid 10a and container 10b may be insufficient, in dashed region A3, may be formed with through hole on the lid 10a.
At this, lid 10a is gone up the reason that produces the failure welding of being represented by dashed region A1, dashed region A3 describe.Among the dashed region A1, the temperature of lid 10a itself not have because the irradiation of laser beam LB and fully rising, thereby exists to produce and cover the possibility that 10a passes through the phenomenon that the irradiation of laser beam LB do not melt fully.Specifically since on lid 10a short time cover laser beam LB, thereby the heat of the laser beam LB that shines till the last time conducts to before the periphery of irradiation position, shines laser beam LB next time, thereby can produce this phenomenon.
On the other hand, in dashed region A3, lid 10a has been a high temperature during illuminating laser beam LB, to the lid 10a illuminating laser beam LB under this state, thereby may produce the phenomenon of superfusion.Specifically since on lid 10a short time cover laser beam LB, thereby the heat that produced of the laser beam LB that shines till the last time moderately do not emit and accumulates to the outside, thereby can produce such phenomenon.
As mentioned above, in general method for laser welding, because the pulse period of laser beam ejecting device 1 is short, the displacement of the irradiation position of laser beam LB is also short, thereby lid 10a is gone up roughly the same position short time cover laser beam LB.Therefore, on lid 10a, may produce inadequate fusion or excessive failure weldings such as fusion.In order not produce this failure welding, briefly, in order to carry out suitable welding, the pulse period that prolongs laser beam LB gets final product (in other words, reducing relatively, the irradiation number of times of lid 10a gets final product), if but like this, the needed time of welding operation will be elongated.Therefore, the laser soldering device 100 of present embodiment is carried out a kind of method for laser welding that can not prolong the needed time of welding operation and carry out suitable welding.
(method for laser welding)
Then, the laser soldering device 100 performed method for laser welding to present embodiment describe.
At first, the basic conception to the method for laser welding of present embodiment describes.As mentioned above, when the roughly the same position short time cover laser beam LB on the lid 10a is welded, may produce failure welding.Therefore, in the method for laser welding of present embodiment, to a plurality of workpiece illuminating laser beam LB in turn, to workpiece illuminating laser beam LB continuously, the irradiation of just continuous laser beam LB is not carried out different workpiece.Particularly, laser beam ejecting device 1 carries out following operation: behind a workpiece illuminating laser beam LB, then to other workpiece outgoing laser beam LB, after the workpiece illuminating laser beam LB of specified quantity finished, return workpiece illuminating laser beam LB once more to illuminating laser beam LB last time.Like this, laser beam ejecting device 1 can carry out welding operation simultaneously to a plurality of workpiece.1 pair of same workpiece of laser beam ejecting device is once more during outgoing laser beam LB, in the position of above-mentioned illuminating laser beam LB tightly nearby, particularly, the part of the light beam spot SP that forms on lid 10a overlapped and illuminating laser beam LB.
From the above mentioned, method for laser welding according to present embodiment, can reduce in the unit interval number of times of illuminating laser beam LB on a workpiece, thereby the temperature that can utilize laser beam to make to cover 10a rises to the temperature that produces suitable fusion effectively, and can prevent that the temperature of covering 10a from rising to the high temperature that produces excessive fusion.In other words, can thermal balance well lid 10a be welded.Therefore, according to the method for laser welding of present embodiment, can not produce failure welding and can carry out suitable welding.
And, in the method for laser welding of present embodiment, the pulse period that does not need to prolong laser beam LB (in other words, reduce umber of pulse) setting, and the number of times of illuminating laser beam LB on the inherent workpiece of unit interval is reduced, the part that this irradiation number of times reduces is used for other workpiece illuminating laser beams LB.Thereby finish the back with the welding operation of a workpiece the above-mentioned general method for laser welding that next workpiece carries out welding operation is compared, in the method for laser welding of present embodiment, when the welding operation to a workpiece finishes, operation to a plurality of workpiece also finishes, thereby corresponding each workpiece carries out welding operation, and the needed time of welding operation is constant.
Then, use Fig. 5～Fig. 7 that the concrete example of the method for laser welding of present embodiment is described.The vertical view that Fig. 5～Fig. 7 represents to cover (figure that observes from top), expression is formed on the light beam spot SP that covers.
Fig. 5 is the figure of an example of 100 pairs two of laser soldering devices of expression lid 10a1, the 10a2 method for laser welding that carries out welding operation simultaneously.At this moment, laser beam ejecting device 1 is configured in lid 10a1,10a2 on the workbench 3 relatively by the pulse period that makes laser beam LB vibration, alternately changes the position of illuminating laser beam LB as shown by arrow C and welds.Just laser beam ejecting device 1 be not finish to the lid 10a1 welding carry out again to the lid 10a2 welding, but to the lid 10a1,10a2 carry out welding operation simultaneously.Because driving irradiation position that the drive unit 4,5 of galvanometer mirror GM1, GM2 can make laser beam LB moves with the speed of maximum 3000mm/ second (s), thereby between the pulse period of laser beam LB vibration, can realize making the position of illuminating laser beam LB fully from covering the control that 10a1 moves to lid 10a2.
Particularly, laser beam ejecting device 1, at first the first, at the lower-left illuminating laser beam LB of lid 10a1, the second, at the lower-left illuminating laser beam LB of lid 10a2.Then laser beam ejecting device 1 is at position that the first step is shone lid 10a1 tightly nearby, the 3rd, illuminating laser beam LB.Laser beam ejecting device 1 begins to change in succession widdershins irradiation position shown in arrow F1～F4 and G1～G4 from these positions, 10a1,10a2 carry out welding operation to lid.
Above-mentioned method for laser welding is compared (setting of laser beam ejecting device 1 (interval of pulse period and light beam spot SP etc.) is all identical) with as shown in Figure 4 the general method for laser welding to a lid 10a Continuous irradiation laser beam LB, in method for laser welding as shown in Figure 5, because 10a1,10a2 replace illuminating laser beam LB to lid, thereby, become 1/2 at the number of times of unit interval internal radiation laser beam LB for a lid.At this moment, though the number of times to the illuminating laser beam LB in the unit interval of a workpiece becomes 1/2, but when finishing owing to welding operation to a workpiece, two whole welding operations of workpiece also finish, thereby compare with general method for laser welding, the needed time of welding operation is constant.
And, shine different lids after, when returning once more irradiation and cover, the tightly illuminating laser beam LB nearby of the position of shining in last time, thereby the heat that irradiation produced of laser beam LB is transmitted effectively to the periphery of irradiation position.
In other example, laser soldering device 100 can carry out welding operation simultaneously to 4 lid 10a1～10a4.Fig. 6 is expression to the figure of an example of the method for laser welding that is configured on the workbench 34 lid 10a1～10a4 and welds.At this moment, laser ejecting device 1 covers 10a1～10a4 relatively by the sequential illumination laser beam LB shown in arrow C 1～C4.Particularly, laser beam ejecting device 1, at first first, be positioned at the lower-left illuminating laser beam LB of upper left lid 10a1, the second, be positioned at the lower-left illuminating laser beam LB of upper right lid 10a2, the 3rd, at the lower-left of the lid 10a3 that is positioned at bottom right illuminating laser beam LB, the 4th, at the lower-left of the lid 10a4 that is positioned at lower-left illuminating laser beam LB.Then, laser ejecting device 1 returns, to the next door illuminating laser beam LB of lid 10a1 in the position of first step irradiation, to lid 10a2～10a4 too at the next door illuminating laser beam LB of the irradiation position of last time.Laser beam ejecting device 1 begins to change in succession widdershins irradiation position from these positions, 10a1～10a4 carries out welding operation to lid.At this moment, laser ejecting device 1 changes the lid as the contrast of laser beam irradiation also according to the pulse period of laser beam LB vibration.
Method for laser welding shown in Figure 6 is compared (setting of laser beam ejecting device 1 is identical) with general method for laser welding as shown in Figure 4, in method for laser welding as shown in Figure 6, owing to cover 10a1～10a4 illuminating laser beam LB in turn to 4, thereby, become 1/4 at the number of times of unit interval internal radiation laser beam LB for a lid.At this moment, though the number of times to the illuminating laser beam LB in the unit interval of a workpiece becomes 1/4, when finishing owing to the welding operation to a workpiece, 4 whole welding operations of workpiece also finish, thereby with-as method for laser welding compare, the needed time of welding operation is constant.
In other examples, laser soldering device 100 can to more, for example 100 the lid 10a1～10a100 carry out welding operation.Fig. 7 is expression to the figure of an example of the method for laser welding that is configured on the workbench 3 100 lid 10a1～10a100 and welds.As shown in the figure, lid 10a1～10a100 is configured with horizontal 10 * vertical 10.At this moment, laser beam ejecting device 1 is done the as a whole welding operation of carrying out simultaneously with 10 transversely arranged lids, for example lid 10a1～10a10 is carried out welding operation simultaneously, after doing the welding operation end of 10 as a whole lids, 10 lids that are in the below are carried out welding operation.
Particularly, laser beam ejecting device 1, at first the first, to lid 10a1 illuminating laser beam LB, the second, to lid 10a2 illuminating laser beam LB ..., the 9th, to lid 10a9 illuminating laser beam LB, the tenth, to lid 10a10 illuminating laser beam LB.Then, laser ejecting device 1 returns, to the next door illuminating laser beam LB of lid 10a1 in the position of first step irradiation, to lid 10a2～10a10 too at the next door illuminating laser beam LB of the irradiation position of last time.Laser beam ejecting device 1 begins to change in succession widdershins irradiation position from these positions, 10a1～10a10 carries out welding operation to lid.
And, laser beam ejecting device 1 after the welding operation to lid 10a1～10a10 finishes, carries out welding operation to the lid 10a11～10a20 that is positioned at the below, after the welding operation to lid 10a11～10a20 finishes, similarly the lid that is positioned at the below is carried out welding operation.At this moment, laser ejecting device 1 changes the lid as the contrast of laser beam irradiation also according to the pulse period of laser beam LB vibration.
Method for laser welding shown in Figure 7 is compared (setting of laser beam ejecting device 1 is identical) with general method for laser welding as shown in Figure 4, in method for laser welding as shown in Figure 7, owing to cover 10a1～10a10 illuminating laser beam LB in turn to 10, thereby, become 1/10 at the number of times of unit interval internal radiation laser beam LB for a lid.At this moment, though the number of times to the illuminating laser beam LB in the unit interval of a workpiece becomes 1/10, but when finishing owing to welding operation to a workpiece, 10 whole welding operations of workpiece also finish, thereby compare with the method for laser welding of comparative example, the needed time of welding operation is constant.
As mentioned above, in the method for laser welding of present embodiment, to a plurality of workpiece illuminating laser beam LB in turn, and not to workpiece illuminating laser beam LB continuously.Thus, number of times to a workpiece illuminating laser beam LB in the unit interval reduces, thereby can make the temperature of covering 10a rise to the temperature that produces suitable fusion effectively, and can prevent that the temperature of covering 10a from rising to the high temperature that produces excessive fusion by laser beam LB.Just, can weld well lid 10a thermal balance according to the method for laser welding of present embodiment.Thus, according to the method for laser welding of present embodiment, can not produce failure welding and carry out suitable welding.
In above-mentioned, represented 2,4 and 100 workpiece are carried out the embodiment of laser weld, but of the present invention being suitable for is not limited thereto.The present invention just is according to the ability of laser beam ejecting device 1, can in the transportable scope of pulse period inner laser bundle of regulation the workpiece of the number that can dispose, carry out laser weld side by side.
In addition, in the above-described embodiment, as Fig. 5～shown in Figure 7, in each workpiece, the illuminating laser beam widdershins from the lower-left, but the irradiation sequence of the laser beam in each workpiece is not limited to above-mentioned example.For example also can be from the lower-left illuminating laser beam deasil, also can be as lower-left → upper right → bottom right → upper left, wire ground in diagonal angle changes the irradiation position of laser beam.And the illuminating laser beam order difference of each workpiece also can.For example carry out at the same time in a plurality of workpiece of laser weld, can to a workpiece from the lower-left counterclockwise illuminating laser beam, to another workpiece from the bottom right illuminating laser beam deasil.At this moment,, just can suppress the deviation of heat (temperature) distribution of each workpiece, not reduce operating efficiency ground and carry out laser weld stably as long as the irradiation of the laser beam that carries out continuously in time is that different workpiece is carried out.
And in the object of laser weld (being lid in the present embodiment) shape of illuminating laser beam, be not limited to square or hold, for example can be along circle.Oval, other curved shape illuminating laser beam LB and the situation of carrying out laser weld also is suitable for the present invention.
Claims (5)
1. a laser soldering device welds a plurality of workpiece illuminating laser beams, it is characterized in that,
Comprise: the irradiation position that penetrates the laser beam injection unit of described laser beam and described workpiece is shone the position of described laser beam by described pulse period change with the pulse period of regulation changes the unit,
Described irradiation position changes the position that the unit changes the described laser beam of irradiation, in the continuous described pulse period different workpiece is shone described laser beam.
2. laser soldering device as claimed in claim 1, it is characterized in that, described irradiation position changes the unit, a workpiece is shone described laser beam, then the workpiece to the specified quantity different with a described workpiece shines described laser beam, then a more described workpiece is shone described laser beam, change the position of the described laser beam of irradiation in this way.
3. laser soldering device as claimed in claim 1 or 2 is characterized in that, described irradiation position changes the unit, the position of the described laser beam of change irradiation, and with in a workpiece, the next laser beam of tight irradiation nearby in the position of shining described laser beam.
4. laser soldering device as claimed in claim 1 is characterized in that, described irradiation position changes the unit, is made of the galvanometer mirror.
5. a method for laser welding welds a plurality of workpiece illuminating laser beams, it is characterized in that,
Comprise: the laser beam that penetrates described laser beam with the pulse period of regulation penetrates operation and changes the irradiation position change operation of described workpiece being shone the position of described laser beam,
Change in the operation at described irradiation position, change the position of the described laser beam of irradiation, in the continuous described pulse period, different workpiece is shone described laser beam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004344132A JP2006150398A (en) | 2004-11-29 | 2004-11-29 | Apparatus and method of laser welding |
| JP2004344132 | 2004-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1781648A CN1781648A (en) | 2006-06-07 |
| CN100519047C true CN100519047C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101269548A Expired - Fee Related CN100519047C (en) | 2004-11-29 | 2005-11-29 | Laser welding device and laser welding method |
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|---|---|
| JP (1) | JP2006150398A (en) |
| CN (1) | CN100519047C (en) |
| TW (1) | TW200621410A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4914901B2 (en) * | 2006-11-15 | 2012-04-11 | パイオニア株式会社 | Laser welding apparatus and laser welding method |
| US9061373B2 (en) * | 2011-11-30 | 2015-06-23 | Medtronic, Inc. | Welding method including continuous wave welding and pulse welding for component of an implantable medical device |
| CN107617821A (en) * | 2017-10-17 | 2018-01-23 | 大族激光科技产业集团股份有限公司 | A kind of seal welding method of housing of power cell |
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2004
- 2004-11-29 JP JP2004344132A patent/JP2006150398A/en active Pending
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2005
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| CN1781648A (en) | 2006-06-07 |
| TW200621410A (en) | 2006-07-01 |
| JP2006150398A (en) | 2006-06-15 |
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