CN1781649A - Laser welding device and laser welding method - Google Patents
Laser welding device and laser welding method Download PDFInfo
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- CN1781649A CN1781649A CNA2005101269552A CN200510126955A CN1781649A CN 1781649 A CN1781649 A CN 1781649A CN A2005101269552 A CNA2005101269552 A CN A2005101269552A CN 200510126955 A CN200510126955 A CN 200510126955A CN 1781649 A CN1781649 A CN 1781649A
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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 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 for each period of the pulse. The irradiating position changing means changes the position irradiated with the laser beam so that the neighborhood of the position irradiated with the laser beam is not successively irradiated with the laser beam. By this method, the number of irradiation of the laser beams per unit time on the almost same position of the 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 almost same position of the workpiece is reduced without lengthening the period of the pulse of the laser beam, 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 square box that inside is contained generating element etc. and cover plate carry out laser weld, at first after preposition carries out dry joint (Provisional ends め and welds), by making each mobile ormal weight of workbench and the illuminating laser beam that is equipped with workpiece (square box and cover plate), and square shaped case and cover plate seal.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 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 during 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.
In the technology of in patent documentation 1, putting down in writing, dry joint is carried out at spacing 4 positions to a certain degree on workpiece at first, but because after dry joint, weld in the overlapping mode of irradiation position from the starting position of regulation, thereby if shorten the time that welding operation needs, then may produce the situation of above-mentioned failure welding.
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, the workpiece illuminating laser beam is 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 by the above-mentioned pulse period (パ Le ス cycle ご と To), above-mentioned irradiation position changes the position that the unit changes the above-mentioned laser beam of irradiation, with near the illuminating laser beam continuously position of the above-mentioned laser beam of irradiation not.
In the invention shown in the technical scheme 5, a kind of method for laser welding, the workpiece illuminating laser beam is 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 the irradiation that changes the position of above-mentioned workpiece illuminating laser beam by the above-mentioned pulse period changes operation, change in the operation at above-mentioned irradiation position, change the position of the above-mentioned laser beam of irradiation, with near the illuminating laser beam continuously position of the above-mentioned laser beam of irradiation not.
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 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 the workpiece illuminating laser beam is welded, comprise: the cycle with regulation is penetrated the laser beam injection unit of above-mentioned laser beam and by the above-mentioned pulse period, change is to the irradiation modifier of 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, with near the illuminating laser beam continuously position of the above-mentioned laser beam of irradiation not.
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 the workpiece illuminating laser beam is welded.Specifically, laser soldering device changes the position that the unit changes illuminating laser beam by irradiation position, simultaneously by the workpiece illuminating laser beam is welded.At this moment, irradiation position changes the unit, changes the position of illuminating laser beam, with near in accordance with regulations the pulse illuminating laser beam continuously position of illuminating laser beam not.Just irradiation position change the unit make laser beam not on workpiece roughly same position shine continuously.Thus, according to laser irradiation device, number of times to the roughly same position illuminating laser beam of workpiece 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 number of times the roughly same position illuminating laser beam of workpiece, do not reduce the number of times of relative whole workpiece illuminating laser beam in the unit interval, thereby can not postpone the needed time of welding operation.
In an embodiment of above-mentioned laser soldering device, above-mentioned irradiation position changes the unit, changes the position of the above-mentioned laser beam of irradiation, to shine above-mentioned laser beam by the position of afore mentioned rules pulse more than interval predetermined distance on the above-mentioned workpiece.
In this embodiment, laser soldering device by the position illuminating laser beam of pulse cycle more than interval predetermined distance on the workpiece, just can shine next laser beam on the position of leaving irradiation position certain distance last time.Thus, the heat of laser beam is transmitted on workpiece, be carried out suitable welding.
In another embodiment of above-mentioned laser soldering device, above-mentioned irradiation position changes the unit, changes the position of the above-mentioned laser beam of irradiation, with the tightly illuminating laser beam not nearby in the position of the above-mentioned laser beam of irradiation, until the specified period process of above-mentioned pulse period.
In this embodiment, laser soldering device can be at the tightly illuminating laser beam not nearby of the position of illuminating laser beam, until the specified period process of above-mentioned pulse period, thus, can make near the maintenance workpiece of the position of illuminating laser beam last time produce the temperature of suitable fusion.
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 the workpiece illuminating laser beam is 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 by the above-mentioned pulse period changes operation, change in the operation at above-mentioned irradiation position, change the position of the above-mentioned laser beam of irradiation, with near the illuminating laser beam continuously position of the above-mentioned laser beam of irradiation not.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, under this state, the operation that utilizes laser soldering device 100 to weld to cover 10a and container 10b.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 (ガ Le バ ノ ミ ラ one) 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 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, near the position of illuminating laser beam LB on the lid 10a by pulse cycle illuminating laser beam LB continuously.Specifically, laser beam ejecting device 1, by the position illuminating laser beam LB (position in the position of leaving last time irradiation shine next time laser beam LB) of pulse cycle more than interval predetermined distance on the lid 10a, making continuously at least, the position of illuminating laser beam LB does not overlap.And, through returning later,, particularly, the part of light beam spot SP is overlapped and illuminating laser beam LB in the specified period of pulse period in the position of illuminating laser beam LB till last time tightly nearby.
From the above mentioned, method for laser welding according to present embodiment, can reduce in the unit interval number of times to the roughly the same position illuminating laser beam LB of lid 10a, 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.Therefore, according to the method for laser welding of present embodiment, can not produce failure welding and can thermal balance weld well.
And, in the method for laser welding of present embodiment, not needing to prolong the setting of the pulse period (in other words, reducing umber of pulse) of laser beam LB, the number of times to the roughly the same position irradiation on the lid 10a reduces in the unit interval and make.Therefore, compare with the formation of comparative example shown in Figure 4, in the method for laser welding of present embodiment, though the number of times that in the unit interval the roughly the same position on the lid 10a is shone reduces, but the number of times of unit interval internal radiation lid 10a itself does not reduce, thereby 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.Fig. 5～Fig. 7 represents to cover the vertical view (figure that observes from top) of 10a, and expression is formed on the light beam spot SP that covers on the 10a.
Fig. 5 is the figure of an example of the method for laser welding of expression present embodiment.The order of 1 pair of lid of Fig. 5 (a) expression laser beam ejecting device 10a illuminating laser beam LB.At this moment, laser beam ejecting device 1 is at first at first to covering 4 angle illuminating laser beam LB of 10a, 4 limits to the lid 10a that comprises these light beam spot SP that are formed at 4 angles, particularly, 4 limits to the trim line of square area that will illuminating laser beam LB, adjoining land illuminating laser beam LB welds 4 limits simultaneously.Just the laser beam ejecting device 1, according to the pulse period, last time illuminating laser beam LB the position near do not shine the laser beam LB of next time, and the position illuminating laser beam LB that is leaving.
Particularly, laser beam ejecting device 1, at first the first, at the lower-left illuminating laser beam LB of lid 10a, the second, at bottom right illuminating laser beam LB, the 3rd, at upper right illuminating laser beam LB, the 4th, at upper left illuminating laser beam LB.Just laser ejecting device 1 is at first at first to covering 4 angle adjoining land illuminating laser beam LB of 10a.Then laser beam ejecting device 1 returns (4 cycles of pulse period this moment through), position that the first step is shone lid 10a tightly nearby, the 5th, illuminating laser beam LB, similarly at the 2nd～4 step irradiation position tightly nearby, the 6th～8, illuminating laser beam LB.Laser beam ejecting device 1 from aforesaid position shown in arrow F1～F4, illuminating laser beam LB and welding.Just the laser beam ejecting device 1, unlike as shown in Figure 4 method for laser welding like that to the lid 10a continuously illuminating laser beam LB weld (just welding being positioned at the limit of closing on behind a side weld access node bundle), and to the lid 10a 4 limits weld simultaneously respectively.Therefore, utilize the method for laser welding of present embodiment, on one side welding when finishing, the welding on other 3 limits also roughly finishes simultaneously.
Drive the drive unit 4,5 of galvanometer mirror GM1, GM2, because the irradiation position of laser beam LB is moved with maximum 3000mm/ second (s), thereby can be implemented in fully during the one-period of laser beam LB vibration, make from other the angle irradiation of the angle of lid 10a and swash the control that move the position of laser beam LB.The length of for example covering one side of the square area that 10a need weld is 2mm, pulse period is when being 0.002mm/ second (s), in this case, get final product because irradiation position is moved with 1000mm/ second (s), thereby can be described as in the control range that is in drive unit 4,5.
Fig. 5 (b) is the figure of an example of the welding situation of the lid 10a of expression when using the welding of above-mentioned welding method to finish.Zone A5 represents to cover the zone of 10a fusing, compare (setting of laser beam ejecting device 1 (interval of pulse period, light beam spot SP etc.) is identical) with the fusing situation of the lid 10a of the fusing situation of the lid 10a shown in Fig. 5 (b) and the general method for laser welding of use shown in Fig. 4 (b), lid 10a shown in Fig. 5 (b), the difference of covering as can be known on the 10a because of the fusing situation that the position caused is less, whole does not produce insufficient fusion or excessive fusion etc.Just the lid 10a overall thermal balance of welding according to the method for laser welding of present embodiment is welded well.
And, in above-mentioned corresponding laser-beam welding method, though in the unit interval lid 10a is gone up the number of times minimizing of roughly the same position illuminating laser beam LB, but because the number of times to lid 10a WBR laser beam LB does not reduce in the unit interval, thereby compare with general method for laser welding shown in Figure 4, the needed time of welding operation is almost constant.
Fig. 6 is the figure of other examples of the method for laser welding of expression present embodiment.At this moment, laser beam ejecting device 1 is with shown in Figure 5 routine different, to the order difference of 4 angle illuminating laser beam Lb of lid 10a.Particularly, laser beam ejecting device 1, at first the first, to the lower-left illuminating laser beam LB of lid 10a, the second, to upper right illuminating laser beam LB, the 3rd, to bottom right illuminating laser beam LB, the 4th, to upper left illuminating laser beam LB.Then, laser beam ejecting device 1 returns, in the first step to the position shone of lid 10a tightly nearby, the 5th, illuminating laser beam LB is similarly at the 2nd～4 step irradiation position tightly nearby, the 6th～8, illuminating laser beam LB.Laser beam ejecting device 1 begins shown in arrow G 1～G4 from aforesaid position, illuminating laser beam LB and welding.Laser beam ejecting device 1 also welds 4 limits of lid 10a respectively simultaneously in this case.Carry out the method for laser welding under this irradiation sequence, also can weld well lid 10a thermal balance.
Fig. 7 is the figure of other examples of the method for laser welding of expression present embodiment.At this moment, laser beam ejecting device 1 and Fig. 5 and shown in Figure 6 routine different, initial not to covering 4 angle illuminating laser beam LB of 10a, and to the central portion illuminating laser beam LB on 4 limits of lid 10a, weld at the next door of this position adjoining land illuminating laser beam LB, particularly, laser beam ejecting device 1, at first the first, to the central portion illuminating laser beam LB of the bottom of lid 10a, second, to the central portion illuminating laser beam LB on the right of lid 10a, the 3rd, to the central portion illuminating laser beam LB of the top of lid 10a, the 4th, to the central portion illuminating laser beam LB on the left side of lid 10a.Then, laser beam ejecting device 1 returns, in the first step to the position shone of lid 10a tightly nearby, the 5th, illuminating laser beam LB is similarly at the position of the 2nd～4 step irradiation tightly nearby, the 6th～8, illuminating laser beam LB.Laser beam ejecting device 1 begins shown in arrow H1～H4 from aforesaid position, illuminating laser beam LB and welding.In this example just, at first at the central portion illuminating laser beam LB on 4 limits of lid 10a, and at the next door of this position adjoining land illuminating laser beam LB, finish welding operation at the central portion illuminating laser beam LB on 4 limits at last.The method for laser welding that execution is carried out with this irradiation sequence also can cover 10a thermal balance relatively and weld well.
As mentioned above, in the method for laser welding of present embodiment, cover 10a relatively, by the position illuminating laser beam LB of pulse cycle at the interval of lid on the 10a, near the illuminating laser beam LB continuously position of irradiation last time not.Thus, number of times to the roughly the same position illuminating laser beam LB of lid 10a 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, can not produce failure welding and carry out suitable welding.
In above-mentioned, represented at first lid 10a is gone up at interval to a certain degree 4 position illuminating laser beam LB, and the example of the method for laser welding that the part that comprises these 4 positions is welded respectively simultaneously.But of the present invention being suitable for is not limited to this.For example can weld 8 positions of this 10a (4 angles of lid 10a and the central portion on 4 limits) illuminating laser beam LB at first.
And, object (being lid in the present embodiment) for laser weld, the shape of illuminating laser beam is not limited to square or rectangle, for example under the situation of carrying out laser weld along circular, oval, other curved shape illuminating laser beam LB and can be suitable for the present invention.As described in above-mentioned embodiment, during being shaped as square or rectangle etc. and constituting shape of illuminating laser beam by polygonal a plurality of limits, to each limit of constituting them in turn illuminating laser beam get final product.Just not with the consecutive pulses cycle to illuminating laser beam LB on one side.And being shaped as under the situations such as circle, ellipse of illuminating laser beam determines the irradiation position and the order of laser beam, gets final product so that the distance that the location interval of Continuous irradiation laser beam is predetermined is above.
Claims (5)
1. a laser soldering device welds the workpiece illuminating laser beam, 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, with near the illuminating laser beam continuously position of the described laser beam of irradiation not.
2. laser soldering device as claimed in claim 1 is characterized in that, described irradiation position changes the unit, changes the position of shining described laser beam by described predetermined pulse, with the described laser beam of irradiation on the position more than the interval predetermined distance on the described workpiece.
3. laser soldering device as claimed in claim 1 or 2, it is characterized in that, described irradiation position changes the unit, changes the position of the described laser beam of irradiation, with the specified period of described pulse period through before not at the tightly illuminating laser beam nearby of the position of the described laser beam of irradiation.
4. as each described laser soldering device in the claim 1～3, it is characterized in that described irradiation position changes the unit, is made of the galvanometer mirror.
5. a method for laser welding welds the workpiece illuminating laser beam, 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 by the described pulse period,
Change in the operation at described irradiation position, change the position of the described laser beam of irradiation, with near the illuminating laser beam continuously position of the described laser beam of irradiation not.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004344139A JP2006150399A (en) | 2004-11-29 | 2004-11-29 | Laser welding apparatus and laser welding method |
| JP2004344139 | 2004-11-29 |
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| Publication Number | Publication Date |
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| CN1781649A true CN1781649A (en) | 2006-06-07 |
| CN100515652C CN100515652C (en) | 2009-07-22 |
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| CNB2005101269552A Expired - Fee Related CN100515652C (en) | 2004-11-29 | 2005-11-29 | Laser welding device and laser welding method |
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| JP (1) | JP2006150399A (en) |
| CN (1) | CN100515652C (en) |
| TW (1) | TW200618921A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101563183B (en) * | 2006-11-15 | 2012-07-18 | 日本先锋公司 | Laser welding device and laser welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008221223A (en) * | 2007-03-08 | 2008-09-25 | Nuclear Fuel Ind Ltd | Laser beam welding method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101563183B (en) * | 2006-11-15 | 2012-07-18 | 日本先锋公司 | Laser welding device and laser welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100515652C (en) | 2009-07-22 |
| TW200618921A (en) | 2006-06-16 |
| JP2006150399A (en) | 2006-06-15 |
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