CN214641025U - Remote laser welding device - Google Patents
Remote laser welding device Download PDFInfo
- Publication number
- CN214641025U CN214641025U CN202120560954.3U CN202120560954U CN214641025U CN 214641025 U CN214641025 U CN 214641025U CN 202120560954 U CN202120560954 U CN 202120560954U CN 214641025 U CN214641025 U CN 214641025U
- Authority
- CN
- China
- Prior art keywords
- air curtain
- laser welding
- transverse
- transverse air
- welding device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Laser Beam Processing (AREA)
Abstract
A remote laser welding apparatus comprising: a device body (1); a laser head (2) attached to the apparatus body (1) and emitting a laser beam; two or more transverse air curtain devices (5) arranged around the laser beam, each transverse air curtain device (5) comprising an air curtain spray head (10) held by a respective holding means (4), said air curtain spray heads (10) being for spraying a transverse air curtain towards the laser beam, each holding means (4) being configured such that the distance between the respective air curtain spray head (10) and the laser head (2) in the direction of the laser beam is adjustable. Can effectively avoid the dirt generated in the welding process from contacting the glass cover of the laser head.
Description
Technical Field
The present application relates to a remote laser welding device having a multiple lateral gas curtain device.
Background
Remote laser welding devices typically employ a transverse gas curtain device to prevent splashing of dirt (slag, fumes, etc.) generated during the welding process. During the laser welding process, the transverse air curtain device generates an air curtain transverse to the laser beam above the welding point, and the air curtain can prevent welding slag and smoke generated during the welding process from moving to the laser head glass cover when dirt is moved to the laser head glass cover and adhered to the laser head glass cover, so that the laser head glass cover is protected.
Currently, remote laser welding devices have only one transverse air curtain nozzle that sprays one air curtain in one direction. This single gas curtain does not completely prevent dirt from contacting the optics for all laser welding processes, resulting in poor weld quality and high consumption of the laser head glass cover.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to provide a remote laser welding apparatus that is more efficient in providing a transverse gas curtain.
To this end, the present application provides, in one aspect thereof, a remote laser welding apparatus comprising:
a device body; and
a laser head mounted to the apparatus body for emitting a laser beam;
wherein the remote laser welding device further comprises two or more transverse air curtain devices arranged around the laser beam, each transverse air curtain device comprising an air curtain spray head held by a respective holding means for spraying a transverse air curtain towards the laser beam, each holding means being configured such that the distance between the respective air curtain spray head and the laser head in the axial direction is adjustable.
In one embodiment, at least one of the gas curtain nozzles is in an activated state during operation of the remote laser welding device.
In one embodiment, the transverse air curtain device comprises a pair of transverse air curtain devices arranged opposite to each other, and the laser beam penetrates through the transverse air curtains sprayed by the air curtain spray heads of the pair of transverse air curtain devices at different axial positions during the operation of the remote laser welding device.
In one embodiment, the transverse air curtain devices comprise a first pair of transverse air curtain devices arranged opposite to each other along a first direction and a second pair of transverse air curtain devices arranged opposite to each other along a second direction perpendicular to the first direction, and during the operation of the remote laser welding device, the laser beam penetrates through at least two transverse air curtains of the transverse air curtains sprayed by the air curtain spray heads of the transverse air curtain devices at different axial positions.
In one embodiment, each holding means comprises an axially extensible and retractable telescopic rod for adjusting the axial position of the respective air curtain nozzle relative to the laser head.
In one embodiment, each holder supports a respective air curtain nozzle in a rotatable manner with respect to at least one direction perpendicular to the axial direction, such that the angle of the air curtain nozzle with respect to the laser beam is adjustable.
In one embodiment, each retaining device is further configured to support the respective air curtain nozzle in a movable manner along at least one direction perpendicular to the axial direction.
In one embodiment, each transverse air curtain device is equipped with a respective air curtain line, in each of which a flow regulating valve and a flow monitor are provided.
In one embodiment, the flow rate of the flow rate regulating valve is regulated based on the detection data of the flow rate monitor.
In one embodiment, each transverse air curtain device is further equipped with a switching valve and a pressure sensor, respectively. In another embodiment, the pair of air curtain lines share a common switch valve and pressure sensor.
According to the application, a plurality of, for example two or four, mutually independent gas curtain nozzles are provided in the remote laser welding device for generating a plurality of gas curtains in different directions, in particular pairs of crossing gas curtains facing each other. During the welding process, any one of the air curtain nozzles or a combination of the air curtain nozzles may be used, depending on the welding process requirements. Therefore, aiming at a specific welding process, the number of the used air curtain nozzles can be selected, and the flow and the direction of each air curtain nozzle are controlled, so that the air curtain provides a proper shielding protection effect, dirt is reduced from splashing to the glass cover, the welding quality is improved, and the consumption of the glass cover of the laser head is reduced.
Drawings
The foregoing and other aspects of the present application will be more fully understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic illustration of a laser welding apparatus according to one possible embodiment of the present application;
FIG. 2 is a gas path diagram of the remote laser welding apparatus;
fig. 3 is another gas path diagram of the remote laser welding apparatus.
Detailed Description
The present application relates generally to a remote laser welding apparatus including a robot and a laser welding device held by an arm of the robot. The arm of the robot can move the laser welding device to a desired position and direction to perform laser welding on the workpiece.
A laser welding device according to one possible embodiment of the present application is schematically represented in fig. 1, which, as mentioned above, can be positioned in a desired position and orientation by a robot arm (not shown in the figures). The laser welding device includes: an apparatus body 1 containing laser welding optics and circuitry therein; a laser head 2 mounted on the lower portion of the body 1 and coupled with the optical device for emitting a laser beam downward, the range of the laser beam being indicated by two dotted lines 3 in fig. 1; at least two holding means 4 mounted on the body 1; a transverse air curtain device 5 supported in position by each holder 4; and a protective gas device 6 positioned supported by the at least one holding means 4.
During welding, the robot arm positions the body 1 at an initial position such that a laser beam emitted from the laser head 2 is directed to a start welding point of a workpiece (not shown in the region) to be welded, and performs laser welding. As the robot arm moves and/or rotates with the body 1, the laser beam moves along a desired trajectory on the workpiece, thereby completing the weld.
It is noted that in the orientation shown in fig. 1, the workpiece is positioned below the laser welding device and the laser head 2 faces downward so that the laser beam is directed at the workpiece and moves along the workpiece. However, it will be appreciated that the laser head 2 may be positioned in other orientations relative to the workpiece, such as obliquely oriented or even transversely directed to the workpiece, depending on the particular configuration of the workpiece. For convenience of description in this application, the orientations of the respective constituent elements of the laser welding apparatus are described in the orientation shown in fig. 1, but it is to be understood that the orientations described herein do not limit the laser welding apparatus.
The number of transverse air curtain devices 5 is two or more, preferably arranged in pairs, each pair of transverse air curtain devices 5 facing each other. During the laser welding, one or more of the transverse gas curtain devices 5 may be selectively used according to a specific welding process. It is preferred to use one or more pairs of transverse air curtain devices 5 simultaneously, as will be described later.
The shielding gas means 6 may be one, supported by one of the holding means 4. However, it is also possible to provide two or more shielding gas devices 6, for example, each holder 4 supporting a respective transverse gas curtain device 5 and a respective shielding gas device 6. During the laser welding, one of the shielding gas devices 6 may be selectively used according to a specific welding process.
Each holding means 4 comprises a cross member 7 which is mounted at the lower edge of the body 1. Alternatively, the cross member 7 can be moved relative to the body 1 in its longitudinal direction (the direction perpendicular to the paper in the example in fig. 1). Alternatively, the cross member 7 may be configured to be movable relative to the body 1 in the longitudinal direction and the lateral direction thereof (the left-right direction in the example in fig. 1).
A pair of telescopic rods 8 extend downwards from the cross beam 7. The upper end of the telescopic rod 8 is fixed on the cross beam 7, and the lower end is fixed with the supporting block 9. The telescopic rod 8 is extendable and retractable in the axial direction (vertical direction in fig. 1) of the laser head 2 with respect to the body 1, thereby adjusting the position of the support block 9 in the axial direction with respect to the body 1. The telescopic rods 8 of the transverse air curtain devices 5 are parallel to each other.
Each transverse air curtain device 5 comprises an air curtain spray head 10 supported by a support block 9 and directed transversely to the laser beam emitted by the laser head 2. The spray head 10 is capable of emitting a gas curtain 11 transversely to the laser beam. The transverse air curtain device 5 itself may adopt a prior art structure and will not be described in detail here.
The spray head 10 is preferably rotatable relative to the support block 9 about a longitudinal axis, thereby adjusting the angle of the air curtain 11 relative to the laser beam when viewed in the longitudinal direction. Optionally, the spray head 10 can also be rotated relative to the transverse axis and/or the vertical axis in order to adjust the angle of the air curtain 11 relative to the laser beam viewed in the transverse and/or axial direction.
The showerhead 10 is connected to a flexible gas curtain supply pipe 12, and the gas curtain supply pipe 12 has a fitting 13 at its upper end for connection to a compressed gas line for supplying compressed gas to the showerhead 10 through the gas curtain supply pipe 12. The joint 13 may be fixed relative to the body 1 by a bracket.
For multiple transverse air curtain devices 5, their spray heads 10 may be directed transversely to the laser beam from different directions. For two transverse air curtain devices 5 arranged in pairs, for example as shown in fig. 1, their spray heads 10 are directed transversely to the laser beam in opposite directions to one another.
Since the spray head 10 is supported by the support blocks 9, and the positions (heights) of the support blocks 9 in the axial direction can be respectively adjusted by the corresponding telescopic bars 8, the transverse air curtain generated by the spray head 10 can be positioned at a desired position in the axial direction of the laser beam.
Further, in the laser welding, only one head 10 may be selectively activated; alternatively, two or more of the spray heads 10 may be activated simultaneously. One or both pairs of spray heads 10 facing each other are preferably activated simultaneously to create a cross air curtain. I.e. at least two air curtains are created facing each other or at an angle (preferably perpendicular) to each other. In the case where more than two spray heads 10 are activated, it is preferable to position the spray heads 10 at different heights by means of the respective retaining means 4 so that the air curtains 11 emitted by them do not collide with one another, i.e. the air curtains 11 are offset in height from one another, without significant mutual interference, which is advantageous in order to shield dirt generated during the welding process from flying upwards through the air curtains.
The shielding gas device 6 comprises a nozzle 14, which is likewise supported by the support block 9. A nozzle 14 is directed at the spot location of the laser beam for providing a shielding gas around the spot during welding. The nozzle 14 is connected to a flexible shielding gas supply pipe 15, and the shielding gas supply pipe 15 has a joint 16 at its upper end for connection to a compressed gas supply pipe. The joint 16 may be fixed with respect to the body 1 by a common bracket with the corresponding joint 13.
The nozzle 14 is preferably rotatable about a longitudinal axis relative to the support block 9. Due to this ability to rotate relative to the longitudinal direction, and in addition to the ability to move longitudinally imparted to the nozzle 14 by the cross-beam 7, the nozzle 14 is enabled to point towards the weld spot. The shielding gas device 6 itself may adopt a prior art structure and will not be described in detail here.
The transverse gas curtain device 5 and the shielding gas device 6 are supplied with compressed air by respective compressed gas lines. The transverse gas curtain device 5 and the shielding gas device 6 may use the same type of compressed gas. In this case, the transverse gas curtain device 5 and the shielding gas device 6 can be supplied with compressed gas by the same set of compressed gas lines, which will be described below with reference to fig. 2.
It is to be noted that the transverse air curtain device 5 and the shielding gas device 6 may also be different types of compressed gas, for example compressed air for the transverse air curtain device 5 and compressed inert gas for the shielding gas device 6. In this case, different compressed gas lines can be used to supply the transverse gas curtain device 5 and the protective gas device 6 with different compressed gases. The person skilled in the art will easily conceive of a situation in which different compressed gases are supplied to the transverse gas curtain device 5 and the shielding gas device 6, respectively, by means of two sets of compressed gas lines, based on the compressed gas lines described below with reference to fig. 2.
Turning to fig. 2, there is shown a set of compressed gas lines for supplying the same compressed gas to the transverse gas curtain means 5, the shielding gas means 6 and the body 1. The compressed gas line comprises a main line L0 connected to a compressed gas source, the main line L0 being connected to a water gas unit RIP for the entire remote laser welding plant. The water gas unit RIP includes a gas filter (usually, a plurality of filters are used to filter particles having different particle sizes, and usually, a water gas separation function), a pressure sensor AP, and the like. The compressed gas in the main line L0 is purified via the water gas unit RIP and the pressure is monitored.
After passing through the water gas unit RIP, the main line L0 branches into a first branch line L1 and a second branch line L2, wherein the first branch line L1 leads to the interior of the body 1 shown in fig. 1 for providing protective purge gas to the laser heads 2 and the corresponding optical devices, and the second branch line L2 leads to the respective transverse gas curtain devices 5 and the protective gas device 6.
A gas filter F1 (usually a plurality of filters each adapted to filter particles having a different particle size and usually having a water-gas separation function) is disposed in the first branch line L1. Downstream of the gas filter F1, a first branch line L1 branches into a laser head positive pressure line L3 for maintaining a positive pressure in the laser head 2 and an optical device positive pressure line L4 for protecting the optical devices in the body 1.
An air path switch S and a pressure sensor AP are arranged in the laser head positive pressure pipeline L3, and an air path switch S, a pressure sensor AP and a flow sensor AF are arranged in the optical device positive pressure pipeline L4. The gas circuit switch S in the laser head positive pressure line L3 and the optics positive pressure line L4 and the gas filter F1 may be integrated together to form a purge gas module.
The gas circuit switches S in the laser head positive pressure pipeline L3 and the optical device positive pressure pipeline L4 are used for respectively controlling the on-off of the two pipelines. Of course, as an alternative, a common gas circuit switch may be arranged in the first branch line L1 for simultaneously switching the two lines.
The laser head positive pressure line L3 and the optical device positive pressure line L4 are connected to the laser head 2 and the corresponding optical device through corresponding joints.
The second branch line L2 connects to a robot water-gas cell module that includes a gas filter F2 (typically with water-gas separation) and may be equipped with a gas circuit switch. Downstream of this robot water gas unit module, a second branch line L2 branches into a shielding gas line L5 leading to the shielding gas device 6 and curtain gas lines L6, L7 leading to the respective transverse curtain gas devices 5.
A protective gas line L5 is used for connection to the joint 16 of the protective gas supply pipe 15, and a switching valve V1, a pressure sensor AP, a flow rate regulating valve V2, and a flow rate monitor AM are arranged in the protective gas line L5. The switch valve V1 may be manually or electrically controlled, or have both manual and electrical control functions. The pressure sensor AP is used to detect the pressure in the protection gas line L5, the flow regulating valve V2 is used to regulate the flow in the protection gas line L5, and the flow monitor AM is used to monitor the flow in the protection gas line L5. The opening degree of the flow regulating valve V2 can be controlled by a controller (not shown in the figure) of the remote laser welding apparatus, thereby regulating the flow of the flow regulating valve V2. Alternatively, the controller may control the opening degree of the flow rate adjustment valve V2 based on the output signal of the flow rate monitor AM.
It is noted that although one shielding gas line L5 is shown in fig. 2, it is easily envisaged that the same number of shielding gas lines L5 may be provided for the case where two or more shielding gas devices 6 are used simultaneously. Two or more shielding gas lines L5 may be connected to the second branching line L2 in parallel with each other.
Two air curtain lines L6, L7 are provided for connection to the respective fittings 13 of the air curtain supply duct 12 shown in fig. 1. As shown in fig. 2, both the air curtain lines L6, L7 start at the downstream end of the second branch line L2, and a switching valve V1, a pressure sensor AP, a flow rate adjustment valve V2, and a flow rate monitor AM are disposed in each of the air curtain lines L6 or L7, respectively. The switch valve V1 may be manually or electrically controlled, or have both manual and electrical control functions. The pressure sensor AP is used to detect the pressure in the air curtain line, the flow regulating valve V2 is used to regulate the flow in the air curtain line, and the flow monitor AM is used to monitor the flow in the air curtain line. The opening degree of the flow regulating valve V2 can be controlled by the controller of the remote laser welding apparatus, thereby regulating the flow of the flow regulating valve V2. Alternatively, the controller may control the opening degree of the flow rate adjustment valve V2 based on the output signal of the flow rate monitor AM.
It is noted that although two air curtain lines L6, L7 are shown in fig. 2, it is readily envisaged that the same number of air curtain lines may be provided for a transverse air curtain arrangement 5 having more than two. Each air curtain line is controlled to be switched on and off by a corresponding switch valve V1.
According to an alternative of the present application, a common on-off valve V1 may also be used to switch two or more air curtain lines on and off. For example, in the embodiment shown in fig. 3, a pair of air curtain lines L6, L7 have a common upstream section in which a switching valve V1 and a pressure sensor AP are disposed. A flow regulating valve V2 and a flow monitor AM are respectively arranged in the downstream section of each of the parallel gas curtain lines L6, L7. By means of this common switching valve V1, the switching of the two air curtain lines L6, L7 can be controlled simultaneously.
The layout can be designed similarly for the case of other numbers of air curtain lines.
For example, in the case of including 4 air curtain lines, the four air curtain lines may be respectively connected to the second branch line L2, in each of which a switching valve, a pressure sensor, a flow regulating valve, and a flow monitor are respectively disposed (similar to fig. 2). Alternatively, the four air curtain lines may be divided into two pairs, each pair having a common upstream section in which a switching valve and a pressure sensor are disposed, and a parallel downstream section of each air curtain line in the pair having a flow regulating valve and a flow monitor, respectively, disposed therein (similar to that of fig. 3).
In addition, each air curtain pipeline can be respectively provided with an air channel switch so as to independently control the on-off of each air curtain pipeline.
The foregoing describes that the remote laser welding apparatus includes a robot and a laser welding device, which is held and moved by an arm of the robot. However, the laser welding apparatus provided herein may be positioned in other ways.
According to the remote laser welding device, one or more air curtain nozzles can be selectively activated in a welding operation, so that proper shielding protection is provided for different laser welding processes. Preferably, a pair of air curtain spray heads facing each other is started to generate at least two transverse air curtains, so that dirt generated in welding can be effectively shielded and prevented from flying to the laser head. The scheme of this application can protect laser head, especially glass cover more effectively, can improve welding quality, prolongs the life of laser head, especially glass cover.
Although the present application has been described herein with reference to specific exemplary embodiments, the scope of the present application is not intended to be limited to the details shown. Various modifications may be made to these details without departing from the underlying principles of the application.
Claims (10)
1. A remote laser welding apparatus comprising:
a device body (1); and
a laser head (2) attached to the apparatus body (1) and emitting a laser beam;
characterized in that the remote laser welding device further comprises two or more transverse air curtain devices (5) arranged around the laser beam, each transverse air curtain device (5) comprising an air curtain spray head (10) held by a respective holding means (4), said air curtain spray heads (10) being intended to spray a transverse air curtain towards the laser beam, each holding means (4) being configured such that the distance between the respective air curtain spray head (10) and the laser head (2) in the axial direction is adjustable.
2. The remote laser welding device according to claim 1, characterized in that at least one of the gas curtain nozzles (10) is in an activated state during operation of the remote laser welding device.
3. The remote laser welding device according to claim 1, characterized in that the transverse air curtain device (5) comprises a pair of transverse air curtain devices (5) arranged opposite to each other, and in that during operation of the remote laser welding device, the laser beam passes through the transverse air curtains ejected by the air curtain nozzles (10) of the pair of transverse air curtain devices (5) at different axial positions.
4. The remote laser welding device according to claim 1, characterized in that the transverse air curtain devices (5) comprise a first pair of transverse air curtain devices (5) arranged opposite to each other in a first direction and a second pair of transverse air curtain devices (5) arranged opposite to each other in a second direction perpendicular to the first direction, during operation of the remote laser welding device, the laser beam passing through at least two of the transverse air curtains ejected by the air curtain nozzles (10) of these transverse air curtain devices (5) at different axial positions.
5. The remote laser welding device according to any one of claims 1 to 4, characterized in that each holding means (4) comprises an extensible and retractable rod (8) that is extensible and retractable in the axial direction for adjusting the axial position of the respective air curtain nozzle (10) with respect to the laser head (2).
6. The remote laser welding device according to claim 5, characterized in that each holding means (4) supports the respective air curtain nozzle (10) in a rotatable manner with respect to at least one direction perpendicular to the axial direction, so that the angle of the air curtain nozzle (10) with respect to the laser beam is adjustable.
7. The remote laser welding device according to claim 6, characterized in that each holding means (4) is further configured to support the respective gas curtain nozzle (10) in a movable manner along at least one direction perpendicular to the axial direction.
8. The remote laser welding device as claimed in one of claims 1 to 4, characterized in that each transverse air curtain device (5) is equipped with a respective air curtain line, in each of which a flow regulating valve (V2) and a flow monitor (AM) are provided.
9. The remote laser welding apparatus as claimed in claim 8, characterized in that the flow of the flow regulating valve (V2) is regulated based on the detection data of the flow monitor (AM).
10. The remote laser welding apparatus of claim 8, wherein:
each transverse air curtain device (5) is also respectively provided with a switch valve (V1) and a pressure sensor (AP); or
The air curtain lines in pairs share a common switch valve (V1) and pressure sensor (AP).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120560954.3U CN214641025U (en) | 2021-03-16 | 2021-03-16 | Remote laser welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120560954.3U CN214641025U (en) | 2021-03-16 | 2021-03-16 | Remote laser welding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214641025U true CN214641025U (en) | 2021-11-09 |
Family
ID=78455225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120560954.3U Active CN214641025U (en) | 2021-03-16 | 2021-03-16 | Remote laser welding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214641025U (en) |
-
2021
- 2021-03-16 CN CN202120560954.3U patent/CN214641025U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170252864A1 (en) | Laser processing machine | |
| CN101032786B (en) | Apparatus and method for laser welding | |
| US5221823A (en) | Laser machining apparatus for welding and cutting | |
| JPH04319500A (en) | Device to eliminate and to purify lacquer layer of material body of large area | |
| CN107717227B (en) | Laser narrow gap welding joint | |
| CN104942436A (en) | Variable-focus laser welding equipment, blowing protecting device thereof and blowing protecting method | |
| CN203956335U (en) | A kind of non-ferrous alloy laser weld paraxonic protective device | |
| ES2692667T3 (en) | Method and device for the inspection and regeneration of interior surfaces of ducts by thermal projection of metals | |
| US10335899B2 (en) | Cross jet laser welding nozzle | |
| JP2010207877A (en) | Welding apparatus and soldering apparatus | |
| CN214641025U (en) | Remote laser welding device | |
| CN114346417A (en) | Laser processing head | |
| US20120080413A1 (en) | Laser welding apparatus | |
| DE102019119341B4 (en) | Device for thermally joining at least one workpiece with a burner and a suction device | |
| CN106119518A (en) | A kind of laser impact intensified circulation water injection system | |
| WO2019230193A1 (en) | Anti-fouling gas supply device and anti-fouling method for laser processing head | |
| US4143260A (en) | Multi electrode torch | |
| EP3098019A1 (en) | Laser welding device with splash protection device | |
| CN216574576U (en) | Welding nozzle automatic cleaning device and welding equipment adopting same | |
| JP7063687B2 (en) | Welding equipment and welding method using welding equipment | |
| CN109093236A (en) | A kind of method for plasma cutting and plasma cutting machine | |
| KR20160087510A (en) | Apparatus for supplying processing gas of laser processing head | |
| JP2016138308A (en) | Thermal spray gun and thermal spray device equipped with the same | |
| JP2006068773A (en) | Hybrid laser beam welding machine | |
| KR101059370B1 (en) | Air Nozzle for Laser Optics Head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |