CN108032526B - Laser welding method for butt-jointed plastic workpieces - Google Patents
Laser welding method for butt-jointed plastic workpieces Download PDFInfo
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- CN108032526B CN108032526B CN201711331379.4A CN201711331379A CN108032526B CN 108032526 B CN108032526 B CN 108032526B CN 201711331379 A CN201711331379 A CN 201711331379A CN 108032526 B CN108032526 B CN 108032526B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
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- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to a laser welding method for butt-jointed plastic workpieces, which is characterized in that two plastic workpieces to be welded are butted to form a contact welding surface, a laser beam is obliquely transmitted to the contact welding surface from one of the plastic workpieces through a reflecting piece, and the laser beam moves along a butt joint seam between the two plastic workpieces to be welded, so that the plastic workpieces begin to melt after absorbing laser energy at the contact welding surface, and after pressurization and cooling, the two plastic workpieces are connected into a whole. According to the laser welding method, the reflecting piece is used for transmitting the laser beam from one plastic workpiece to the contact welding surface of the two plastic workpieces to be welded in an inclined manner, so that the plastic workpieces are butted and subjected to side welding, the welding trace of residual materials on the surfaces of the plastic workpieces is avoided, and the plastic workpieces are relatively flat.
Description
Technical Field
The invention relates to the technical field of laser welding, in particular to a laser welding method for butting plastic workpieces.
Background
Laser plastic welding is used as a clean and effective plastic welding mode, resin degradation is less in the welding process, scraps are less, secondary pollution cannot be caused due to non-contact in the welding process, and the use is gradually and widely performed.
At present, the common plastic welding joint is in the form of up-down stitch welding, laser penetrates through the upper layer of light-transmitting plastic and is absorbed by the lower layer of light-absorbing plastic, and meanwhile, the two layers are melted by pressurizing, so that a welding area is formed on a contact surface. Other joint form laser welding applications are immature. Butt joints, as a more common form of joint, have a number of applications in production. When the materials are butted, the positions of the plastic materials absorbing light are melted by the light beam vertical welding to connect the materials, however, the surface back to the light beam can not absorb light well and can not form a welding area, and the material is directly vertically welded, so that welding marks can be easily formed on the surface of the material, and the appearance of a product is influenced.
Disclosure of Invention
Therefore, a laser welding method capable of ensuring the surface flatness of the butted plastic workpieces to realize side welding is needed.
A laser welding method for butt-jointed plastic workpieces includes such steps as butt-jointing two plastic workpieces to be welded to form a contact welding surface, transmitting laser beam from one of the plastic workpieces to the contact welding surface by a reflector, moving the laser beam along the butt-joint seam between two plastic workpieces to be welded, absorbing laser energy at the contact welding surface, melting, and cooling under pressure to connect two plastic workpieces together.
In one embodiment, one of the plastic workpieces is made of a material that is transparent to the laser beam and the other plastic workpiece is made of a material that absorbs the laser beam.
In one embodiment, both plastic workpieces to be welded are made of a material transparent to the laser beam, and at least one of the plastic workpieces is coated with a substance that absorbs the laser radiation at the contact-welding interface, or a layer of material opaque to the laser beam is arranged between the two plastic workpieces.
In one embodiment, the reflecting member is made of a plate transparent to laser beams, and a chamfer is formed on one side of the plate and plated with a laser total reflection film.
In one embodiment, the reflector has a first surface and a second surface opposite to each other, the chamfer is formed between the first surface and the second surface, and when the laser beam welds two plastic workpieces to be welded, the second surface presses on the plastic workpieces and moves along a butt joint between the two plastic workpieces to be welded.
In one embodiment, the laser beam is vertically incident to the laser total reflection film on the oblique cutting surface so as to enable the laser beam to be obliquely incident to a contact welding surface formed by butting two plastic workpieces to be welded.
In one embodiment, the chamfer is inclined at an acute angle α relative to the horizontal, and α is greater than 45 °.
In one embodiment, the opposite edges of the two plastic workpieces to be welded are respectively cut, so that the opposite joint of the two plastic workpieces to be welded is in a wedge shape, and the vertex angle beta of the wedge shape is equal to 2 times alpha.
In one embodiment, the laser beam is focused on the bottom surface of the plastic workpiece before moving the reflector into the laser beam to alter the incidence of the laser beam on the plastic workpiece.
In one embodiment, when the laser beam moves along the butt joint between two plastic workpieces to be welded for welding, the reflecting piece moves along the butt joint between the two plastic workpieces to be welded with the laser beam, the calibration beam clinging to the oblique cutting surface is used for being incident on the plastic workpieces, and the calibration beam is always kept to pass through the bottom profile of the butt joint between the two plastic workpieces to be welded, so that the angular bisector of the wedge-shaped vertex angle beta on the plastic workpieces which are obliquely transmitted by the laser beam is ensured to be positioned on the oblique cutting surface of the reflecting piece, and the laser beam reflected by the reflecting piece keeps focused on the contact welding surface in the process of moving along the butt joint.
The laser welding method for butting the plastic workpieces utilizes the reflecting piece to transmit the laser beam from one plastic workpiece to the contact welding surface of the two plastic workpieces to be welded in an inclined manner, realizes the butting of the plastic workpieces and the side welding of the plastic workpieces, avoids the welding trace of the residual materials on the surfaces of the plastic workpieces, and enables the plastic workpieces to be relatively flat.
Drawings
FIG. 1 is a schematic diagram illustrating a laser welding method for butt-joining two plastic workpieces according to one embodiment;
FIG. 2 is a schematic diagram illustrating a structure of a reflector and a path of a laser beam in the reflector in a laser welding method according to an embodiment;
FIG. 3 is a schematic illustration of laser welding two plastic workpieces according to another embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1, the present embodiment provides a laser welding method for butting plastic workpieces, taking two plastic workpieces 300 and 400 to be welded as an example, in the laser welding method, after the two plastic workpieces 300 and 400 to be welded are butted with each other, a contact welding surface b is formed at the joint, that is, an area where a laser beam is incident in the laser welding method. In this embodiment, the laser 100 for generating the laser beam may be a semiconductor laser or an ultraviolet laser, and is not limited thereto.
In this embodiment, the reflection member 200 transmits the laser beam obliquely from one of the two plastic workpieces 300, 400 to the contact welding surface b, specifically, the laser beam changes the laser path through the reflection member 200 and then obliquely enters the contact welding surface b, rather than welding the joint from the top of the two plastic workpieces 300, 400, so that the areas in contact with the side surfaces of the two plastic workpieces 300, 400 are welded together tightly to realize side welding, thereby improving the stability of connection, and avoiding welding marks left on the surfaces of the two plastic workpieces 300, 400, so that the surfaces of the plastic workpieces 300, 400 are relatively flat.
In the above embodiment, when the laser beam is reflected by the reflector 200 and obliquely enters the contact welding surface b between the two plastic workpieces 300 and 400 to be welded, the focal point of the laser beam is correspondingly located on the contact welding surface b to form a light spot, and the area irradiated by the light spot is heated to melt the plastic workpieces 300 and 400. When the laser beam is moved along the butt joint between the two plastic workpieces 300, 400 to be welded, that is, the spot is moved on the contact-welded surface b, thereby welding the two plastic workpieces 300, 400 together.
It should be noted that the two plastic workpieces 300, 400 to be welded can absorb laser energy at the contact welding surface b, so that the two plastic workpieces 300, 400 to be welded are melted at the contact welding surface b, and are connected into a whole after being pressurized and cooled. In this embodiment, at least one of the two plastic workpieces 300, 400 to be welded is made of a material transparent to the laser beam, so that the reflector 200 can obliquely transmit the laser beam through the plastic workpiece transparent to the laser beam to strike the contact welding surface b of the two plastic workpieces 300, 400 to be welded to realize side welding; and the welding attitude of the laser 100 emitting the laser beam does not need to be adjusted, and the laser 100 can reflect the laser beam to the contact welding surface b through the reflecting piece 200 only by moving along the butt joint between the two plastic workpieces 300 and 400 to be welded, so that the movement during laser welding is simpler, and the side welding can be carried out on the two plastic workpieces 300 and 400 without using complex mechanisms such as multi-axis linkage and the like.
In one embodiment, one of the plastic workpiece 300 and the plastic workpiece 400 is made of a material transparent to the laser beam and the other is made of a material absorbing the laser beam. For example, as shown in fig. 1, the plastic workpiece 300 is made of a material transparent to the laser beam, and the plastic workpiece 400 is made of a material absorbing the laser beam. Further, when the reflector 200 transmits the laser beam through the plastic work 300, the plastic work 300 is transparent to the laser beam, so that the laser energy of the laser beam is not absorbed, and the laser beam is obliquely incident on the side surface of the plastic work 400 almost without loss after transmitting through the plastic work 300. Since the plastic workpiece 400 can absorb the laser beam, the contact welding surface b of the plastic workpiece 400 irradiated by the laser beam absorbs the laser energy to melt, and is welded with the plastic workpiece 300 after cooling. In the present embodiment, after being reflected by the reflector 200, the laser beam is transmitted through the plastic workpiece 300 and then enters the contact welding surface b at the junction between the two plastic workpieces 300, 400, i.e., the energy of the laser beam is concentrated on the butted sides of the plastic workpieces 300, 400, and no welding trace is formed on the surfaces of the two plastic workpieces 300, 400; and the side welding mode of oblique incidence to the contact welding surface b can weld the whole side surfaces of the two plastic workpieces 300 and 400 which are connected together, thereby avoiding the problem of poor welding effect caused by insufficient welding.
It should be noted that, in other embodiments, the two plastic workpieces 300, 400 to be welded are made of a material transparent to the laser beam, so that the laser beam can still be obliquely incident on the contact welding surface b at the junction between the two plastic workpieces 300, 400 after being emitted by the reflector 200, and at this time, only a material layer capable of absorbing laser energy or a substance capable of absorbing laser radiation needs to be disposed at the contact welding surface b, so that the contact welding surface b can absorb laser energy to weld the two plastic workpieces 300, 400 to be welded together. For example, a substance that absorbs laser radiation is applied to at least one of the two plastic workpieces 300, 400 at the contact-welding surface b, so that when a laser beam is incident on the contact-welding surface b, the substance that absorbs laser radiation applied to the contact-welding surface b can absorb the laser energy, thereby welding the two plastic workpieces 300, 400 together. Of course, a layer of material opaque to the laser beam may be disposed at the contact welding surface b between the two plastic workpieces 300, 400, and when the laser beam is incident on the layer of material at the contact welding surface b, the layer of material opaque to the laser beam absorbs the radiation energy of the laser to realize temperature rise, thereby welding the two plastic workpieces 300, 400 together.
Referring to fig. 2, the reflecting member 200 is made of a plate transparent to the laser beam, and a chamfered surface 200b is formed on one side of the plate, and the chamfered surface 200b is coated with a total reflection film. It should be noted that the reflective member 200 is made of a light-transmitting plate material, such as a PMMA plate; thus, the laser beam will not be absorbed after entering the reflection member 200, and since the oblique cutting plane 200b formed on one side of the plate is plated with the laser total reflection film, the light path of the laser beam entering the oblique cutting plane 200b can be changed, specifically, the reflected laser beam is obliquely incident on the contact welding surface b where the two plastic workpieces 300 and 400 to be welded are connected, so as to implement welding.
The reflector 200 has a first surface 200a and a second surface 200c opposite to each other, and a chamfer 200b is formed between the first surface 200a and the second surface 200 c. When the laser beam welds the two plastic workpieces 300, 400 to be welded, the second surface 200c is pressed against the plastic workpieces 300, 400 and moves along the butt joint between the two plastic workpieces 300, 400 to be welded. Furthermore, the reflector 200 not only makes the laser beam obliquely incident on the contact welding surface b formed by the butt joint of the two plastic workpieces 300, 400, but also flattens the surfaces of the two plastic workpieces 300, 400 when the laser beam is welding the two plastic workpieces 300, 400, so that the surfaces of the two plastic workpieces 300, 400 welded together are smoother.
In the above embodiment, the laser beam is vertically incident on the laser total reflection film on the inclined cutting plane 200b, so that the laser beam is obliquely incident on the contact welding surface b formed by butting the two plastic workpieces 300 and 400 to be welded, it should be noted that in this embodiment, the inclined angle of the inclined cutting plane 200b relative to the horizontal plane is an acute angle α, and α is greater than 45 °, so that after the laser beam is vertically incident on the laser total reflection film on the inclined cutting plane 200b, the included angle between the outgoing light and the incoming light is greater than 90 °, that is, the laser beam reflected by the reflection member 200 is obliquely emitted toward the second surface 200c of the reflection member 200, in this embodiment, after the laser beam is reflected by the reflection member 200, the focus point of the laser beam is located at a position d below the second surface 200c of the reflection member 2001That is, the laser beam may be emitted from the second surface 200c of the bottom of the reflector 200 to the contact welding surface b to ensure that the laser beam can perform welding on the two plastic workpieces 300, 400.
As shown in fig. 3, since the laser beam obliquely incident on the contact-bonded surface b is reflected by the total reflection film of the laser beam on the chamfered surface 200b of the reflecting member 200, the reflecting member 200 changes the focal point f of the laser beam before the optical path1And a focal point f of the laser beam after the light path is changed by the reflecting member 2002The planes of the chamfer 200b are symmetrical to each other. Opposite the laser 100When the focusing height of the reflecting member 200 is constant, the laser beam is translated in the transverse direction (i.e., the left-right direction in fig. 3) with respect to the oblique cutting plane 200b of the reflecting member 200, i.e., the laser beam is not reflected by the reflecting member 200 and the focal point f is made to be the same1D is kept at a distance below the second surface 200c of the reflecting member 2002While translating, the focal point f of the laser beam after the light path is changed by the reflecting member 2002Moves along an inclined track, that is, when the laser 100 is transversely translated with respect to the inclined cutting plane 200b of the reflecting member 200 without changing the focal height, the distance d between the focal point of the laser beam reflected by the reflecting member 200 and the second surface 200c of the reflecting member 2001The laser beam is linearly changed, so that the laser beam can move up and down in the contact welding surface b between the two plastic workpieces 300 and 400 to be welded by the transverse translation of the laser 100 relative to the oblique cutting surface 200b of the reflector 200, and the full-width laser welding of the contact welding surface b is realized by matching with the movement of the laser beam of the laser 100 along the butt joint between the two plastic workpieces 300 and 400 to be welded, so as to improve the connection stability of the two plastic workpieces 300 and 400.
It should be noted that in some embodiments, the focus of the laser 100 may be adjusted while the laser 100 is laterally translated with respect to the chamfer 200b of the reflector 200, so that the focal point f of the laser beam after the light path is changed by the reflector 2002Will be located on the contact welding surface b all the time when moving up and down relative to the second surface 200c of the reflector 200, thereby ensuring that the energy of the laser beam is concentrated and improving the welding precision. For example, as shown in fig. 1, when the contact welding surfaces b of two plastic workpieces 300 and 400 to be welded are in a vertical side-standing state, and the laser 100 is transversely translated (i.e. in the left-right direction in fig. 1) relative to the oblique cutting surface 200b of the reflector 200, if the laser 100 is not focused, the laser beam is reflected by the reflector 200, and then the focal point f is shown in fig. 32Will follow an inclined trajectory. Accordingly, without moving the laser 100, the laser 100 may be adjusted so that the laser beam is focused on the contact bonding surface b, thereby passing each transient state during the lateral translation of the laser 100 relative to the chamfer 200b of the reflector 200The focusing state of the laser 100 is adjusted so that the laser beam is focused to the contact-bonded surface b. That is, when the laser 100 is laterally translated with respect to the chamfer 200b of the reflector 200, the laser beam reflected by the reflector 200 can be always kept focused on the contact-bonded surface b by real-time focusing of the laser 100.
With continued reference to FIG. 3, the focus f of the laser beam is changed by the reflecting member 200 before the optical path1And a focal point f of the laser beam after the light path is changed by the reflecting member 2002The plane of the oblique section 200b is symmetrical to the plane of symmetry, so that when the laser 100 is translated laterally with respect to the oblique section 200b of the reflector 200 without changing the focal point of the laser 100, the focal point f1Moving track and focal point f2Also, the moving trajectories of (1) are symmetrical to each other with respect to a plane in which the oblique plane 200b is located, that is, when the oblique plane 200b is inclined at an acute angle α with respect to the horizontal plane, the focal point f is formed1On the line of the moving trajectory and the focal point f2The angle between the lines of the moving track is 2 times the angle α in some embodiments, the abutting edges of the two plastic workpieces 300, 400 to be welded are cut separately so that the abutting edges of the two plastic workpieces 300, 400 to be welded are wedge-shaped, and the apex angle β of the wedge is 2 times α, that is, the focal point f is 2 times the focal point f2The moving track line is parallel to the contact welding surface b between the two plastic workpieces 300, 400 to be welded, so that when the reflector 200 and the laser 100 are horizontally moved to a certain position, the focal point f can be made to be parallel to the contact welding surface b2I.e., when the laser 100 is transversely translated with respect to the oblique cutting plane 200b of the reflector 200, the laser beam reflected by the reflector can always vertically focus on the contact welding surface b without focusing the laser 100, so as to achieve a better laser welding effect.
In some embodiments, before the reflecting member 200 is moved into the laser beam to change the incidence of the laser beam on the plastic workpiece 300, 400, the laser beam is focused on the bottom surface of the plastic workpiece 300, 400, i.e., the thickness d-d of the plastic workpiece 300, 4002. So as to quickly focus the laser beam emitted by the laser 100 toThe laser beam reflected by the reflector 200 is focused exactly on the contact welding surface b, that is, when the reflector 200 is moved into the optical path of the laser beam and the bottom profile of the butt joint between the two plastic workpieces 300, 400 to be welded at the welding position is located on the oblique cutting surface 200b of the reflector 200, the laser beam is reflected by the reflector 200 and focused on the contact welding surface b.
It should be noted that, when the laser beam moves along the butt joint between the two plastic workpieces 300, 400 to be welded to weld, the reflector 200 moves along the butt joint between the two plastic workpieces 300, 400 to be welded with the laser beam, and the calibration beam clinging to the chamfer 200b is incident on the plastic workpieces 300, 400 and always keeps passing through the bottom profile of the butt joint between the two plastic workpieces 300, 400 to ensure that the bisector of the wedge-shaped vertex angle β on the plastic workpieces 300, 400 through which the laser beam obliquely transmits is located on the chamfer 200b of the reflector 200, so that the laser beam reflected by the reflector 200 keeps focusing on the contact welding surface b during the movement along the butt joint, and the contact welding surface b at the joint between the two plastic workpieces 300, 400 is precisely welded.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A laser welding method for butting plastic workpieces is characterized in that the two plastic workpieces to be welded are butted to form a contact welding surface, the two plastic workpieces to be welded can absorb laser energy at the contact welding surface, a laser beam is obliquely transmitted to the contact welding surface from one plastic workpiece through a reflecting piece and moves along a butt joint seam between the two plastic workpieces to be welded, so that the plastic workpieces begin to melt after absorbing the laser energy at the contact welding surface, and after pressurization and cooling, the two plastic workpieces are connected into a whole; the reflecting piece is made of a plate transparent to laser beams, an oblique cut surface is formed on one side of the plate, and a laser total reflection film is plated on the oblique cut surface; the reflecting piece is provided with a first surface and a second surface which are opposite up and down, the oblique cutting plane is formed between the first surface and the second surface, and when the laser beam welds two plastic workpieces to be welded, the second surface is pressed on the plastic workpieces and moves along a butt joint seam between the two plastic workpieces to be welded.
2. The laser welding method according to claim 1, wherein one of the plastic workpieces is made of a material transparent to the laser beam, and the other plastic workpiece is made of a material absorbing the laser beam.
3. The laser welding method according to claim 1, characterized in that both plastic workpieces to be welded are made of a material transparent to the laser beam, and at least one plastic workpiece is coated with a substance absorbing the laser radiation at the contact weld interface.
4. The laser welding method according to claim 1, characterized in that a layer of material that is opaque to the laser beam is arranged between the two plastic workpieces.
5. The laser welding method according to claim 4, wherein the reflecting member is made of a light-transmitting PMMA plate.
6. The laser welding method according to claim 1, wherein the laser beam is vertically incident on the laser total reflection film on the chamfer to be obliquely incident on a contact welding surface formed by butting two plastic workpieces to be welded.
7. The laser welding method according to claim 6, wherein the chamfer is inclined at an acute angle α with respect to the horizontal plane, and α is greater than 45 °.
8. The laser welding method according to claim 7, characterized in that the abutting edges of the two plastic workpieces to be welded are cut separately so that the abutting parts of the two plastic workpieces to be welded are wedge-shaped, and the apex angle β of the wedge-shape is equal to 2 times α.
9. The laser welding method of claim 8, wherein the laser beam is focused on the bottom surface of the plastic workpiece before moving the reflector into the laser beam to alter the incidence of the laser beam on the plastic workpiece.
10. The laser welding method according to claim 9, characterized in that when the laser beam moves along the butt joint between the two plastic workpieces to be welded for welding, the reflector moves along the butt joint between the two plastic workpieces to be welded with the laser beam, and the calibration beam is incident on the plastic workpieces by using the calibration beam closely attached to the oblique cutting plane and always passes through the bottom profile of the butt joint between the two plastic workpieces to be welded, so as to ensure that the bisector of the top angle β of the wedge shape on the plastic workpieces through which the laser beam is obliquely transmitted is located on the oblique cutting plane of the reflector, so that the laser beam reflected by the reflector keeps focused on the contact welding surface during the movement along the butt joint.
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| CN110625950A (en) * | 2019-10-25 | 2019-12-31 | 苏州卡利肯新光讯科技有限公司 | Laser welding method for butt-joint plastic workpiece |
| CN114571080B (en) * | 2022-04-14 | 2024-03-22 | 常州世竟液态金属有限公司 | Oblique angle double-sided laser welding method for bulk amorphous alloy and plate |
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| GB9821375D0 (en) * | 1998-10-01 | 1998-11-25 | Welding Inst | Welding method |
| EP1306196A1 (en) * | 2001-10-24 | 2003-05-02 | Telsonic AG | Holding device, device for welding of parts and process for providing a holding device |
| DE10245355A1 (en) * | 2002-09-27 | 2004-04-08 | Degussa Ag | pipe connection |
| JP4933277B2 (en) * | 2007-01-15 | 2012-05-16 | リコー光学株式会社 | Lens fixing method and lens unit |
| CN101898419B (en) * | 2010-04-02 | 2013-05-15 | 深圳市大族激光科技股份有限公司 | Plastic laser welding method |
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