CN108581238B - Laser welding pressing device and pressing welding method - Google Patents
Laser welding pressing device and pressing welding method Download PDFInfo
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- CN108581238B CN108581238B CN201810315524.8A CN201810315524A CN108581238B CN 108581238 B CN108581238 B CN 108581238B CN 201810315524 A CN201810315524 A CN 201810315524A CN 108581238 B CN108581238 B CN 108581238B
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- laser
- welding
- focal length
- length adjusting
- pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser welding pressing device and a pressing welding method, which comprise the following steps: the device comprises a fixed seat, an ascending and descending sliding device and a laser access device; the fixed seat is vertically fixed, the laser access device is vertically arranged, one side of the ascending and descending sliding device is fixed on the fixed seat, and the other side of the ascending and descending sliding device is fixedly connected with the laser access device, so that the bottom end of the laser access device compresses a part to be welded under constant pressure. The pressing device can press the to-be-welded part under constant pressure through the ascending and descending sliding device, so that moving or jumping welding is realized; through the design of the focal length adjusting device, the pressing device can adjust the focus and the downward pressure of laser according to different welding parts, so as to realize moving or jumping welding; the invention can firmly press the parts to be welded all the time, improve the operation efficiency of the equipment, save the cost and effectively avoid the defects of penetration welding, burnthrough, infirm welding or no sealing and the like of the thin plate.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a laser welding pressing device and a pressing welding method.
Background
The laser welding technology which is widely applied at present brings great convenience to production due to high efficiency and high automation. Generally, laser welding has two forms of thermal conduction welding and deep fusion welding, wherein, the method of thermal conduction welding is as follows: heating the surface to be processed by laser radiation, wherein the surface heat is diffused inwards by heat conduction, and the workpiece is melted by controlling laser parameters such as the width, energy, peak power, repetition frequency and the like of laser pulse to form a specific molten pool; laser deep melting welding generally adopts continuous laser beams to complete material connection, the metallurgical physical process of the laser deep melting welding is very similar to electron beam welding, and an energy conversion mechanism is completed through small holes. Under the irradiation of high power density laser, the material is evaporated to form small holes, the small holes filled with vapor act like a black body, almost all incident light energy is absorbed, and heat is transferred from the outer wall of the high temperature cavity, so that the metal surrounding the periphery of the cavity is melted. The wall material under the irradiation of the light beam is continuously evaporated to generate high-temperature steam, and the surface tension of the wall layer formed by the liquid flowing outside the hole wall is kept in balance with the steam pressure continuously generated in the hole cavity and keeps dynamic balance. The light beam continuously enters the small hole, the small hole is always in a flowing stable state, the molten metal surrounding the hole wall moves forwards along with the forward light beam, the molten metal fills a gap left after the small hole is moved away and is condensed along with the gap, and a welding seam is formed.
Laser welding is a non-contact type welding and does not require pressure during operation. However, to form an acceptable weld, a tight fit between the materials to be welded is still required, with no gaps. During welding, a jig is usually adopted to compress a welding part, laser acts on a welding surface, and paraxial or coaxial blowing shielding gas is adopted, but the existing jig cannot effectively compress a thin plate, and the defects of penetration welding, burning-through, infirm welding, unsealed sealing and the like easily occur in the process of welding the thin plate.
Disclosure of Invention
The invention mainly solves the technical problem of providing a laser welding pressing device and a pressing welding method, which can effectively press a to-be-welded part, particularly a to-be-welded thin plate, and solve the defects caused by insufficient pressing in the existing laser welding process.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a laser welding pressing device, including: the device comprises a fixed seat, an ascending and descending sliding device and a laser access device; the fixed seat is vertically fixed, the laser access device is vertically arranged, one side of the ascending and descending sliding device is fixed on the fixed seat, and the other side of the ascending and descending sliding device is fixedly connected with the laser access device, so that the bottom end of the laser access device compresses a part to be welded under constant pressure.
In a preferred embodiment of the present invention, the laser access device comprises a housing, a calibration device, a focus adjustment device and a pressing nozzle; the top of casing is laser incident port, calibrating device installs the inside of casing, focus adjusting device movable mounting be in the casing bottom, focus adjusting device's bottom is connected compress tightly the mouth, adjusts focus adjusting device to adjust laser focus with it is right to compress tightly the mouth treat the holding down force of welding piece, realize removing or the welding of beating.
In a preferred embodiment of the present invention, the ascending and descending slide device is a cylinder, a spring or a guide rail slide block.
In a preferred embodiment of the present invention, the center lines of the housing, the calibration means, the focus adjustment means and the pressing nozzle are collinear.
In a preferred embodiment of the present invention, the housing comprises a straight cylinder section and a conical section, the calibration device is installed in the straight cylinder section, the focal length adjustment device is installed at the bottom end of the conical section, the diameter of the conical section is larger than that of the focal length adjustment device, and the diameter of the focal length adjustment device is larger than that of the pressing nozzle.
In a preferred embodiment of the present invention, the collimating device includes a collimating module and a focusing module, and the collimating module is mounted on an upper portion of the focusing module.
In a preferred embodiment of the present invention, the focal length adjusting device comprises a first hollow shaft focal length adjusting device and a second hollow shaft focal length adjusting device which are connected up and down, wherein the diameter of the first hollow shaft focal length adjusting device is larger than that of the second hollow shaft focal length adjusting device.
In a preferred embodiment of the present invention, the device further comprises a protective lens device, wherein the protective lens device is mounted on the straight cylinder section of the shell and is positioned below the calibration device.
In a preferred embodiment of the invention, the apparatus further comprises a shielding gas inlet port mounted in one side wall of the conical section of the housing.
In order to solve the technical problem, the invention adopts another technical scheme that: the method for compressing and welding by using the laser welding compressing device comprises the following steps:
(1) according to the thickness of the part to be welded, the ascending and descending sliding device is adjusted to enable the bottom end of the laser access device to press the part to be welded under constant pressure;
(2) adjusting the first hollow shaft focal length adjusting device and/or the second hollow shaft focal length adjusting device to adjust the focal point of the laser and the downward pressure of the bottom end of the laser access device on the part to be welded so that the laser moves or jumps along a set route for welding;
(3) the laser sequentially passes through the laser incident port, the collimation module, the focusing module and the protective lens device and then acts on the surface of the welding part, and moves along with the movement of a laser spot or the welding part to be welded to finish welding.
The invention has the beneficial effects that: according to the laser welding pressing device, the pressing device can press a part to be welded under constant pressure through the ascending and descending sliding device; through the design of the focal length adjusting device, the pressing device can adjust the focus and the downward pressure of laser according to different welding parts, so as to realize moving or jumping welding; the invention can firmly press the parts to be welded all the time, improve the operation efficiency of the equipment, save the cost and effectively avoid the defects of penetration welding, burnthrough, infirm welding or no sealing and the like of the thin plate.
Drawings
FIG. 1 is a schematic perspective view of a laser welding pressing apparatus according to a preferred embodiment of the present invention;
the parts in the drawings are numbered as follows: 1. the laser welding device comprises a fixed seat, 2, an ascending and descending sliding device, 3, a laser incidence port, 4, a collimation module, 5, a focusing module, 6, a protective lens device, 7, a protective gas input port, 8, a first hollow shaft focusing adjusting device, 9, a second hollow shaft focusing adjusting device, 10, a pressing nozzle, 11, a welding part and 12, and a shell.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, an embodiment of the present invention includes:
example 1
The invention discloses a laser welding pressing device, which comprises: the device comprises a fixed seat 1, an ascending and descending sliding device 2 and a laser access device; the fixed seat 1 is vertically fixed, if the fixed seat is vertically fixed on a machine table, the laser access device is vertically arranged, one end of the ascending and descending sliding device 2 is fixed on the fixed seat 1, the other end of the ascending and descending sliding device is fixedly connected with the laser access device, and the bottom end of the laser access device is pressed tightly on the part 11 to be welded under constant pressure according to the thickness of the part 11 to be welded. The ascending and descending sliding device 2 is a device which can realize ascending and descending sliding, such as an air cylinder, a spring or a guide rail sliding block and the like, and can always keep constant pressure to press the part to be welded 11, so that the part to be welded can be effectively pressed in the whole laser welding process.
The laser access device comprises a housing 12, a calibration device, a focus adjustment device and a compacting mouth 10. The casing 12 comprises a straight cylinder section and a conical section, the top end of the straight cylinder section is a laser incident port 3, the calibration device is installed in the straight cylinder section of the casing 12 and comprises a collimation module 4 and a focusing module 5, and specifically, the collimation module 4 is installed on the upper portion of the focusing module 5. The focal length adjusting device is installed at the bottom end of the conical section of the shell 12, specifically, the focal length adjusting device comprises a first hollow shaft focal length adjusting device 8 and a second hollow shaft focal length adjusting device 9 which are connected up and down, and the pressing nozzle 10 is installed at the bottom end of the focal length adjusting device, specifically, at the bottom end of the second hollow shaft focal length adjusting device 9.
The diameter of the conical section of the shell 12 is larger than that of the first hollow shaft focal length adjusting device 8, the diameter of the first hollow shaft focal length adjusting device 8 is larger than that of the second hollow shaft focal length adjusting device, and the diameter of the second hollow shaft focal length adjusting device is larger than that of the pressing nozzle, so that the bottom end of the whole laser access device is a conical body.
The center lines of the shell 12, the laser inlet end 3, the calibrating device (the collimating module 4 and the focusing module 5), the focal length adjusting device (the first hollow shaft focal length adjusting device 8 and the second hollow shaft focal length adjusting device 9) and the pressing nozzle 10 are collinear.
The laser welding pressing device further comprises a protective lens device 6 and a protective gas input port 7, wherein the protective lens device 6 is installed on the straight cylinder section of the shell 12 and is located below the calibration device, specifically, the focusing module 5, and the protective effect of preventing sundries in the welding process from splashing is achieved. The shielding gas inlet port 7 is installed on one side wall of the conical section of the shell 12, and shielding gas is input into the laser passage device through the shielding gas inlet port 7 to protect a welding pool and realize welding.
The invention also discloses a compression welding method, which utilizes the laser welding compression device to compress and comprises the following steps:
(1) according to the thickness of the part to be welded, the ascending and descending sliding device is adjusted to enable the bottom end of the laser access device to press the part to be welded under constant pressure;
(2) adjusting the first hollow shaft focal length adjusting device and/or the second hollow shaft focal length adjusting device to adjust the focal point of the laser and the downward pressure of the bottom end (pressing nozzle) of the laser access device on the part to be welded, so that the laser moves or jumps along a set route for welding;
(3) the pressing nozzle 10 is acted by an upward acting force, so that the pressing nozzle is always positioned around a welding spot, laser sequentially passes through the laser incident port 3, the collimation module 4, the focusing module 5 and the protective lens device 6 and then acts on the surface of a part to be welded 11, and moves along with the movement of a laser spot or a welding part to finish welding.
The pressing device is used for laser welding of the thin plate, and the obtained thin plate is good in welding quality and free of defects such as penetration, burn-through, infirm welding or poor sealing.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A laser welding compression device, comprising: the device comprises a fixed seat, an ascending and descending sliding device and a laser access device; the fixed seat is vertically fixed, the laser access device is vertically arranged, one side of the ascending and descending sliding device is fixed on the fixed seat, and the other side of the ascending and descending sliding device is fixedly connected with the laser access device, so that the bottom end of the laser access device compresses a part to be welded under constant pressure; the laser access device comprises a shell, a calibration device, a focal length adjusting device and a pressing nozzle; the top end of the shell is provided with a laser incident port, the calibrating device is arranged in the shell, the focal length adjusting device is movably arranged at the bottom of the shell, the bottom end of the focal length adjusting device is connected with the pressing nozzle, and the focal length adjusting device is adjusted to adjust the focal point of laser and the downward pressure of the pressing nozzle on the part to be welded so as to realize moving or jumping welding; the calibration device comprises a collimation module and a focusing module, and the collimation module is arranged at the upper part of the focusing module; the focal length adjusting device comprises a first hollow shaft focal length adjusting device and a second hollow shaft focal length adjusting device which are connected up and down, wherein the diameter of the first hollow shaft focal length adjusting device is larger than that of the second hollow shaft focal length adjusting device.
2. The laser welding press of claim 1 wherein the ascending and descending slide is a cylinder, spring, or rail slide.
3. The laser welding press of claim 1, wherein the center lines of the housing, the alignment device, the focus adjustment device, and the pressing nozzle are collinear.
4. The laser welding press of claim 1 wherein the housing includes a straight barrel section and a tapered section, the alignment device being mounted in the straight barrel section, the focus adjustment device being mounted at a bottom end of the tapered section, the tapered section having a diameter greater than a diameter of the focus adjustment device, the focus adjustment device having a diameter greater than a diameter of the pressing nozzle.
5. The laser welding press of claim 4 further comprising a protective lens device mounted to the straight barrel section of the housing and below the alignment device.
6. The laser welding press of claim 4, further comprising a shielding gas inlet port mounted on one sidewall of the conical section of the housing.
7. A press welding method characterized by pressing with the laser welding pressing apparatus of any one of claims 1 to 6, comprising the steps of:
(1) according to the thickness of the part to be welded, the ascending and descending sliding device is adjusted to enable the bottom end of the laser access device to press the part to be welded under constant pressure;
(2) adjusting the first hollow shaft focal length adjusting device and/or the second hollow shaft focal length adjusting device to adjust the focal point of the laser and the downward pressure of the bottom end of the laser access device on the part to be welded so that the laser moves or jumps along a set route for welding;
(3) the laser sequentially passes through the laser incident port, the collimation module, the focusing module and the protective lens device and then acts on the surface of the part to be welded, and moves along with the movement of laser spots or the part to be welded, so that the welding is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315524.8A CN108581238B (en) | 2018-04-10 | 2018-04-10 | Laser welding pressing device and pressing welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810315524.8A CN108581238B (en) | 2018-04-10 | 2018-04-10 | Laser welding pressing device and pressing welding method |
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| CN108581238A CN108581238A (en) | 2018-09-28 |
| CN108581238B true CN108581238B (en) | 2020-06-26 |
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| CN108943739A (en) * | 2018-05-04 | 2018-12-07 | 威克锐光电科技（苏州）有限公司 | A kind of laser plastic welding device and its welding method |
| CN110153558B (en) * | 2019-05-30 | 2021-05-04 | 深圳德龙激光智能有限公司 | Laser welding jig and method for positive and negative pole pieces and lead-out pole lugs of lithium battery cell |
| CN111805083A (en) * | 2020-08-03 | 2020-10-23 | 威克锐光电科技（苏州）有限公司 | Driven pressing device for laser welding |
| CN112077510B (en) * | 2020-08-21 | 2022-03-25 | 上海航天精密机械研究所 | Laser welding and welding following pressing device and method with coaxial protection function |
| CN114619138A (en) * | 2022-03-09 | 2022-06-14 | 长春理工大学 | Follow-up self-load welding head and control method thereof |
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| JP3482452B2 (en) * | 2000-12-25 | 2003-12-22 | 川崎重工業株式会社 | Press head for laser welding |
| US20060006155A1 (en) * | 2004-07-08 | 2006-01-12 | Hill Graham E | Device for assembling a banded fuel cell stack |
| CN102528283A (en) * | 2010-12-30 | 2012-07-04 | 杭州中科新松光电有限公司 | Welding head of optical fiber transmission laser |
| CN102699542B (en) * | 2012-05-30 | 2014-10-15 | 北京工业大学 | Compressing working head for free curve laser welding |
| CN202639649U (en) * | 2012-06-12 | 2013-01-02 | 沈阳新松机器人自动化股份有限公司 | Laser welding processing head |
| CN202763284U (en) * | 2012-09-12 | 2013-03-06 | 苏州领创激光科技有限公司 | Laser welding machine with follow-up and material pressing functions |
| CN203973055U (en) * | 2014-08-07 | 2014-12-03 | 湖北多贝尔激光自动化有限责任公司 | A kind of servo-actuated hold down gag of laser plate stitch-welding |
| CN104227242B (en) * | 2014-09-10 | 2016-03-02 | 北京工业大学 | Central negative pressure plasma arc laser coaxial composite welding apparatus and method |
| CN205834484U (en) * | 2016-07-13 | 2016-12-28 | 卡门哈斯激光科技（苏州）有限公司 | Cut head unit |
| CN207026766U (en) * | 2017-07-07 | 2018-02-23 | 深圳市普盛激光设备有限公司 | A kind of laser cutting device |
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