CN108500460A - Limited power wide cut laser welding head and laser-beam welding machine - Google Patents
Limited power wide cut laser welding head and laser-beam welding machine Download PDFInfo
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- CN108500460A CN108500460A CN201810690481.1A CN201810690481A CN108500460A CN 108500460 A CN108500460 A CN 108500460A CN 201810690481 A CN201810690481 A CN 201810690481A CN 108500460 A CN108500460 A CN 108500460A
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- China
- Prior art keywords
- lens group
- focus lens
- mounting box
- laser
- welding head
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Classifications
-
- 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
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a kind of limited power wide cut laser welding head and laser-beam welding machines, wherein laser welding head includes：Shell is installed, accommodating cavity is offered in the mounting shell body；It is carried on the focus lens group that the installation shell is used to be focused laser beam processing, the focusing center of focus lens group can move back and forth relative to the central axis of laser beam；And it is carried on installation shell, the driving mechanism for driving focus lens group to move back and forth.When being welded, driving mechanism drives focus lens group to move back and forth, the focusing center of focus lens group moves back and forth also relative to the central axis of laser beam at this time, and laser beam when being irradiated in focus lens group can phase focusing center reflect to form weldering spot, with the movement of focus lens group, weldering spot is also moved with the focusing center of focus lens group with identical track, under conditions of power is constant, the width of welding is expanded, and simple structure, convenient control, cost are relatively low.
Description
Technical field
The present invention relates to technical field of laser welding, more specifically, it relates to a kind of limited power wide cut laser welding
Head and laser-beam welding machine.
Background technology
Laser welding technology has the heated quick heating of energy density height, workpiece, welding heat affected small, workpiece thermal deformation because of it
Small, welding depth-to-width ratio is big, weld strength is big etc. advantages, are more and more widely used and are manufactured in modern industry.
But the weldering spot that usual laser is formed after focusing lens focus is smaller, usually between 0.2-0.5mm, in order to right
Workpiece is effectively welded, it is necessary to which the width for controlling weld seam is less than the size of weldering spot, and the manufacture rigorous of product is high, system
Make that difficulty is big, while the size of appearance of weld is also smaller so that the intensity after workpiece welding fabrication is relatively low.
To overcome drawbacks described above, the size for increasing weldering spot is needed, but under the lasing condition of limited power, if increasing weldering spot
Size can reduce the energy density of laser, cause Weldability to decline, welding thermal deformation increase, and lose the excellent of laser welding
Gesture.Solving the common method of drawbacks described above at present is：
One, increase the power of laser, and the synchronous size for increasing weldering spot, the ruler of spot is welded to realize that laser energy density is constant
It is very little to become larger, but this mode can increase manufacturing cost, and energy consumption is higher；
Two, using lens control system as shown in Figure 1, which includes：PC machine and the motion controller being connected with PC machine, fortune
Movement controller is connected with galvanometer one and galvanometer two, and galvanometer one and galvanometer two are connected with a reflective mirror respectively；Carrying out welding job
When, laser generator sends out laser beam and irradiates on a reflective mirror wherein, emits to focus lamp through another reflective mirror and focuses shape
Laser beam is driven to scan up fortune in the Vertical Square of weld seam at weldering spot, then by motion controller control galvanometer one and galvanometer two
It is dynamic so that the inswept weld seam surrounding in track of spot to be welded, in the case where welding spot size and constant laser energy density, increase
The width of appearance of weld；But this lens control system control is complicated, and cost is higher.
It is therefore desirable to provide a kind of new scheme to solve drawbacks described above.
Invention content
In view of the deficienciess of the prior art, first of the embodiment of the present invention to be designed to provide a kind of limited power wide
Width laser welding head has the advantages that weld width can be expanded under limited power.
The above-mentioned technical purpose of the embodiment of the present invention technical scheme is that：
A kind of limited power wide cut laser welding head, including：
Shell is installed, accommodating cavity is offered in the mounting shell body, and the bottom of the installation shell is equipped with and leads to for laser beam
The first port crossed；
It is carried on the installation shell and in the accommodating cavity, the condenser lens for being focused processing to laser beam
The focusing center of group, the focus lens group can move back and forth relative to the central axis of laser beam, and the condenser lens
Group be equipped with for laser beam by the second port；And
It is carried on the installation shell, the driving mechanism for driving the focus lens group to move back and forth.
By using above-mentioned technical proposal, when being welded, driving mechanism drives focus lens group to move back and forth, at this time
The focusing center of focus lens group moves back and forth also relative to the central axis of laser beam, and laser beam is irradiated to focusing thoroughly
It can reflect to form weldering spot to focusing center when in microscope group, with the movement of focus lens group, weldering spot is also poly- with focus lens group
Burnt center is moved with identical track, under conditions of power is constant, expand the width of welding, and simple in structure, control
System is convenient, cost is relatively low.
Further, the focus lens group includes：
It is carried on the mounting box of the installation shell, second port is opened in the mounting box；And
The focusing lens of the mounting box are carried on, the focusing center is located at the focal point of the focusing lens.
By using above-mentioned technical proposal, laser beam is focused by focusing lens, and is formed and is welded in focal point
Spot.
Further, the mounting box rotary type is assemblied in the installation shell, and the focusing center and laser beam
Central axis offset setting and can be around the central axis reciprocating rotation of laser beam.
By using above-mentioned technical proposal, focusing center rotates around the central axial direction of laser beam, and weldering spot is made to be formed
The welding track of annular or arc, to increase the width of welding.
Further, the mounting box slidingtype is assemblied in the installation shell, and the focusing center can be directed away from
Or close to laser beam central axis direction toward polyslip.
By using above-mentioned technical proposal, focusing center is directed away from or the direction of the central axis of close laser beam
Toward polyslip so that the weldering straight welding track of spot shape, and sawtooth can be finally formed after being superimposed again with the movement of plumb joint
The welding track of shape, to increase the width of welding.
Further, the driving mechanism selects to be applicable in alone or in combination from such as lower structure：Gear mechanism or company
Linkage.
Further, the gear mechanism includes：
It is carried on the first driving motor of the installation shell；
It is fixedly connected on the driving gear of the power output shaft of first driving motor；And
The driven gear for being fixedly connected on the mounting box and being meshed with the driving gear.
By using above-mentioned technical proposal, driving gear rotation is driven by the first driving motor, and it is driven to engage driving
Gear rotates, and to drive mounting box to rotate, focusing center is made to be rotated around the central axial direction of laser beam, and structure letter
It is single, at low cost, be easily achieved.
Further, the driving mechanism is applicable in alone or in combination from such as lower structure：Cylinder, lead screw slide block mechanism or
Cam mechanism.
Further, the lead screw slide block mechanism includes：
It is carried on the second driving motor of the installation shell；
It is carried on the sliding block of the mounting box side；And
The lead screw for being fixedly connected on second driving motor and being threadedly coupled with the sliding block.
By using above-mentioned technical proposal, rotated by the second motor driving lead screw, and screw-driven occurs with sliding block,
To drive mounting box to slide, focusing center be directed away from or close to laser beam central axis direction toward polyslip.
Further, the trim ring for compressing the focusing lens is equipped in the mounting box.
By using above-mentioned technical proposal, focusing lens can be stably fixed in mounting box, and filled by trim ring
It tears open more convenient.
Second of the embodiment of the present invention is designed to provide a kind of laser-beam welding machine, and having can expand under limited power
The advantages of weld width.
The above-mentioned technical purpose of the embodiment of the present invention technical scheme is that：
A kind of laser-beam welding machine, including：Laser welding head described in any of the above-described technical solution.
By using above-mentioned technical proposal, laser welding head expands weld width in welding, to improve welding
Ability.
In conclusion the invention has the advantages that：
First, under conditions of power is constant, the width of welding is expanded, and simple structure, convenient control, cost are relatively low；
Second, focusing lens dismounting is more convenient.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is that the structural schematic diagram of the embodiment of the present invention one eliminates the shell of half for clear signal；
Fig. 3 is the sectional view of the embodiment of the present invention one；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention three.
In figure：1, shell is installed；11, accommodating cavity；12, the first port；2, focus lens group；21, mounting box；22, it focuses
Eyeglass；23, trim ring；24, the second port；3, driving mechanism；31, the first driving motor；32, driving gear；33, driven gear；
34, the second driving motor；35, sliding block；36, lead screw.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained without creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Embodiment one
A kind of limited power wide cut laser welding head, as shown in Figures 2 and 3, including：Shell 1 is installed, installs and is opened up in shell 1
The bottom for having an accommodating cavity 11, and installing shell 1 be equipped with for laser beam by the first port 12；Be carried on installation shell 1 and
In accommodating cavity 11, the focus lens group 2 for being focused processing to laser beam, the focusing center of focus lens group 2
Can be moved back and forth relative to the central axis of laser beam, and focus lens group 2 be equipped with for laser beam by it is second logical
Mouth 24；And it is carried on installation shell 1, the driving mechanism 3 for driving focus lens group 2 to move back and forth.
Specifically, laser generator is located at the surface of installation shell 1, and in the laser beam that sends out of laser generator
Mandrel line is consistent with the installation central axis of shell 1, and focus lens group 2 includes：It is carried on the mounting box 21 of installation shell 1, the
Two ports 24 are opened in mounting box 21；And the focusing lens 22 of mounting box 21 are carried on, focusing center is located at focusing lens 22
Focal point.
Mounting box 21 is by bearing and installation 1 rotary type of shell assembly, and the central axis of mounting box 21 is equally and mounting shell
The central axis of body 1 is consistent, the axis of focusing lens 22 and the axis phase deviation of mounting box 21, to the focus of focusing lens 22
With the central axis phase deviation of laser beam；Focusing lens 22 are pressed abd fixed on by trim ring 23 in mounting box 21, due to focusing
Eyeglass 22 is usually convex lens, and the thickness of both sides is less than intermediate thickness, therefore a support level is arranged on mounting box 21,
The side wall of support level is adapted with 22 outer surface of focusing lens, is again provided on trim ring 23 and 22 other side table of focusing lens
The compatible arcwall face in face, and the mode for being bolted or snapping connection is fixed with 21 phase of mounting box, to focus
Eyeglass 22 is pressed abd fixed on mounting box 21, and focusing lens 22 can be stably fixed in mounting box 21 by trim ring 23,
And assembly and disassembly are more convenient.
Certainly in practical application, inclined between 21 central axis of focus and mounting box of multiple condenser lenses can be made
The different focus lens group 2 of size is moved, so as to select different focus lens groups 2 according to the size of weld seam, to be adapted to not
With the weld seam of width dimensions.
Mounting box 21 is gear mechanism by bearing and installation 1 rotary type of shell assembly, driving mechanism 3, including：It is carried on
Install shell 1 the first driving motor 31, be fixedly connected on the first driving motor 31 power output shaft driving gear 32, with
And the driven gear 33 for being fixedly connected on mounting box 21 and being meshed with driving gear 32；First driving motor 31 is usually and motor
Controller is connected, and can control the keying of the first driving motor 31 by electric machine controller and adjusts turning for the first driving motor 31
Speed is equipped with mounting plate on the inner wall of installation shell 1, and the first driving motor 31 is bolted on mounting plate, driven tooth
Wheel 33 is socketed in by way of interference fit on mounting box 21, or is fixed by screws on mounting box 21；Pass through first
Driving motor 31 drives driving gear 32 to rotate, and engages driving driven gear 33 and rotate, and to drive mounting box 21 to rotate, makes
Focusing center around laser beam central axial direction rotate, and it is simple in structure, at low cost, be easily achieved.
When being welded, laser is entered by the first port 12 after being sent out by laser generator and is radiated at focusing lens 22
On, line focus eyeglass 22 is focused in focal point formation weldering spot when driving mechanism 3 drives driving installation and rotates after focusing refraction
Also with rotating with it, weldering spot is also moved with the focus of focusing lens 22 with identical track eyeglass 22, the rotation of focusing lens 22 one
The welding track that an annular is formed after circle, under conditions of power is constant, expand the width of welding, and structure letter
It is single, easy to control, cost is relatively low；Multiple annular welds circles are formed after the movement of plumb joint and the feed motion of bonding machine are superimposed
Mutually overlapped welding track, the rotating speed by adjusting the first driving motor 31 can adjust the overlapping dimension of adjacent annular weldering circle,
Control process is simple, and can meet the needs of a variety of weld shapes such as straight line, curve, camber line, annular.
Embodiment two
The difference between this embodiment and the first embodiment lies in：In the present embodiment, driving mechanism 3 uses link mechanism, i.e., will implement
Gear set in example one replaces with Crank connected rod group, specifically, being fixed with drive on the power output shaft of the first driving motor 31
Moving plate, in other embodiments, drive disk can also be substituted with crank rod, and drive rod is fixed on the side wall of mounting box 21,
Hinge bar is set in drive disk and between drive rod, one end of hinge bar is hinged on the off-centered position of drive disk, another
End is hinged with drive rod, to which the reciprocating rotation in fixed angle of mounting box 21 can be driven by the first driving motor 31,
And the welding track of a C-shaped is formed after rotating semiaxis, then coordinate the feed motion of bonding machine that can form corrugated welding
Track.
Embodiment three
The difference between this embodiment and the first embodiment lies in：In the present embodiment, as shown in figure 4,21 slidingtype of mounting box is assemblied in
Shell 1 is installed, sliding slot is offered in installation shell 1, and the width of sliding slot is more than the size of mounting box 21, so as to be formed
For the space that mounting box 21 slides, the side of mounting box 21 is matched with sliding slot, and on the moving direction of mounting box 21, is focused
The axis of eyeglass 22 and the axis of mounting box 21 align；
Driving mechanism 3 is lead screw slide block mechanism, and lead screw slide block mechanism includes：Be carried on installation shell 1 the second driving motor 34,
The silk for being carried on the sliding block 35 of 21 side of mounting box and being fixedly connected on the second driving motor 34 and being threadedly coupled with sliding block 35
Bar 36；Second driving motor 34 is secured by bolts in installation shell 1, and sliding block 35 is arranged in a side surface of mounting box 21, silk
Bar 36 is mutually fixed by the power output shaft of welding or shaft coupling and the second driving motor 34, and lead screw 36 can be unidirectional lead screw
36, can also be Bidirectional-screw 36.
When second motor driving lead screw 36 rotates, lead screw 36 occurs screw-driven driving mounting box 21 with sliding block 35 and slides
It moves, focusing center is directed away from or the direction of the central axis of close laser beam is toward polyslip, so that weldering spot shape
Straight welding track, and zigzag welding track can be finally formed after being superimposed again with the movement of plumb joint, to increase
The width of welding is added.
Example IV
The present embodiment and embodiment three difference lies in：In the present embodiment, driving mechanism 3 is cylinder, and the pedestal of cylinder passes through
Screw is fixed on installation shell 1, and piston rod is fixed by screws on mounting box 21, to pass through the flexible of cylinder
Drive mounting box 21 toward polyslip.
Embodiment five
The present embodiment and embodiment three difference lies in：In the present embodiment, driving mechanism 3 is cam mechanism, i.e., is driven second
Fix cam on the power output shaft of dynamic motor 34, the side of cam and mounting box 21 abuts against, in installation shell 1 positioned at
The opposite side of cam is provided with spring, and one end of spring is clamped on the inner wall of accommodating cavity 11, and the other end is connected to mounting box
On 21, when to be rotated by 34 driving cam of the second driving motor, cam can contradict the movement of mounting box 21, and in spring
Under the action of power, mounting box 21 can reset, to drive mounting box 21 toward polyslip.
Embodiment six
The laser welding head of any technical solution, laser welding in a kind of laser-beam welding machine, including embodiment one to embodiment five
Head expands weld width in welding, to improve Weldability.
In the above-described embodiments, it emphasizes particularly on different fields to the description of each embodiment, there is no the part being described in detail in some embodiment,
It may refer to the associated description of other embodiment.
It should be noted that for each method embodiment above-mentioned, for simple description, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the described action sequence because
According to the present invention, certain steps may use other sequences or be carried out at the same time.Secondly, those skilled in the art should also know
It knows, embodiment described in this description belongs to preferred embodiment, the action being related to and module not necessarily this hair
Necessary to bright.
In several embodiments provided herein, it should be understood that disclosed device, it can be real in other way
It is existing.For example, the apparatus embodiments described above are merely exemplary, for example, said units division, only one kind patrols
Volume function divides, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or can be with
It is integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed mutual
Coupling or communication connection can be the INDIRECT COUPLING between device or unit or communication connection by some interfaces, can be electricity
Letter or other forms.
The above-mentioned unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, and without limiting it；Although reference
The present invention will be described in detail for previous embodiment, it will be understood by those of ordinary skill in the art that：It still can be to preceding
The technical solution recorded in each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
Modification or replacement, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of limited power wide cut laser welding head, which is characterized in that including：
Shell (1) is installed, accommodating cavity (11) is offered in the installation shell (1), and the bottom of the installation shell (1) is equipped with
For laser beam by the first port (12)；
It is carried on the installation shell (1) and is located in the accommodating cavity (11), for being focused processing to laser beam
The focusing center of focus lens group (2), the focus lens group (2) can move back and forth relative to the central axis of laser beam,
And the focus lens group (2) be equipped with for laser beam by the second port (24)；And
It is carried on the installation shell (1), the driving mechanism (3) for driving the focus lens group (2) to move back and forth.
2. limited power wide cut laser welding head according to claim 1, which is characterized in that the focus lens group (2)
Including：
It is carried on the mounting box (21) of the installation shell (1), second port (24) is opened in the mounting box (21)；With
And
The focusing lens (22) of the mounting box (21) are carried on, the focusing center is located at the focus of the focusing lens (22)
Place.
3. limited power wide cut laser welding head according to claim 2, which is characterized in that mounting box (21) rotation
Formula is assemblied in the installation shell (1), and the central axis of the focusing center and laser beam offset setting and can be around laser
The central axis reciprocating rotation of light beam.
4. limited power wide cut laser welding head according to claim 2, which is characterized in that mounting box (21) sliding
Formula is assemblied in the installation shell (1), and the focusing center can be directed away from or close to laser beam central axis
Direction is toward polyslip.
5. limited power wide cut laser welding head according to claim 3, which is characterized in that the driving mechanism (3) from
As selected to be applicable in alone or in combination in lower structure：Gear mechanism or link mechanism.
6. limited power wide cut laser welding head according to claim 5, which is characterized in that the gear mechanism includes：
It is carried on the first driving motor (31) of the installation shell (1)；
It is fixedly connected on the driving gear (32) of the power output shaft of first driving motor (31)；And
The driven gear (33) for being fixedly connected on the mounting box (21) and being meshed with the driving gear (32).
7. limited power wide cut laser welding head according to claim 4, which is characterized in that the driving mechanism (3) from
As being applicable in alone or in combination in lower structure：Cylinder, lead screw slide block mechanism or cam mechanism.
8. limited power wide cut laser welding head according to claim 7, which is characterized in that the lead screw slide block mechanism packet
It includes：
It is carried on the second driving motor (34) of the installation shell (1)；
It is carried on the sliding block (35) of the mounting box (21) side；And
The lead screw (36) for being fixedly connected on second driving motor (34) and being threadedly coupled with the sliding block (35).
9. limited power wide cut laser welding head according to claim 2, which is characterized in that set in the mounting box (21)
It is useful for compressing the trim ring (23) of the focusing lens (22).
10. a kind of laser-beam welding machine, which is characterized in that including：Laser welding head as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690481.1A CN108500460A (en) | 2018-06-28 | 2018-06-28 | Limited power wide cut laser welding head and laser-beam welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690481.1A CN108500460A (en) | 2018-06-28 | 2018-06-28 | Limited power wide cut laser welding head and laser-beam welding machine |
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| CN108500460A true CN108500460A (en) | 2018-09-07 |
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| CN208496067U (en) * | 2018-06-28 | 2019-02-15 | 苏州天弘激光股份有限公司 | Limited power wide cut laser welding head and laser-beam welding machine |
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