CN218080953U - Laser welding device for synchronously rolling sheet butt joint - Google Patents
Laser welding device for synchronously rolling sheet butt joint Download PDFInfo
- Publication number
- CN218080953U CN218080953U CN202222313980.3U CN202222313980U CN218080953U CN 218080953 U CN218080953 U CN 218080953U CN 202222313980 U CN202222313980 U CN 202222313980U CN 218080953 U CN218080953 U CN 218080953U
- Authority
- CN
- China
- Prior art keywords
- butt joint
- welding
- laser
- follow
- laser welding
- 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
The invention provides a laser welding device for synchronously rolling sheet butt joints, which relates to the field of laser processing and comprises a laser welding head, an installation adjusting mechanism, a tail protection nozzle, a laser beam, a follow-up roller, a to-be-welded butt joint and a welding leakage groove, wherein the follow-up roller and the tail protection nozzle are respectively connected to the laser welding head through the installation adjusting mechanism, the laser beam emitted by the laser welding head is positioned right above a welding seam of the to-be-welded butt joint, the follow-up roller is connected to the to-be-welded butt joint, and the to-be-welded butt joint is positioned above the welding leakage groove. The invention adopts the following roller to fix the butt joint, eliminates the misalignment in the sheet assembly, effectively avoids the problem of increased misalignment caused by wave deformation in the welding process, reduces the assembly precision requirement, adopts the roller with constant pressure to roll the two sides of the sheet, can effectively reduce the welding stress and deformation of the sheet, reduces the orthopedic cost after welding, and obviously improves the fatigue performance of the welding line.
Description
Technical Field
The invention relates to the field of laser processing, in particular to a laser welding device for synchronously rolling a sheet butt joint.
Background
In recent years, there has been an increasing demand for welding materials such as thin plates, for example, bellows in a power system of a launch vehicle, and materials of such parts are generally stainless steel, titanium alloy, high temperature alloy, and the like. For the welding of thin plate materials with the thickness less than 0.5mm, the welding difficulty is obviously increased due to the fact that the thickness of the materials is too thin, and the following problems exist when the thin plates (generally less than or equal to 1 mm) are welded in the traditional welding methods such as TIG (tungsten inert gas) and MIG (metal-inert gas) and the like:
(1) As the material has small heat conductivity coefficient and large linear expansion coefficient, the parts are subjected to transverse shrinkage and wave instability deformation due to thermal deformation along with the welding process, so that the welding seam is difficult to form.
(2) The rigidity of the thin plate is poor, the traditional tool is difficult to clamp, the assembly misalignment and the assembly gap are difficult to control, and vaporization perforation is easy to occur in the welding process.
(3) The heat input is large, the welding deformation is serious, the heat circulation in the welding process causes large grains in a welding seam and a heat affected zone, the joint is seriously embrittled, and the mechanical property is reduced.
(4) The traditional welding method is difficult to realize the automatic control of the welding process and has low automation degree.
Aiming at the problems, laser welding is a non-second choice for welding stainless steel sheets due to the characteristics of small spot diameter, high energy concentration, low heat input, accurate parameter control, easy realization of automation and the like. However, the laser welding has high requirements on the assembly precision of parts, and particularly for thin plate butt joints, the welding quality of the parts depends on two key factors: firstly, the misalignment amount and the assembly clearance of the part assembly are reduced; and secondly, how to control the deformation of parts in the welding process and ensure that the assembly clearance and the error variable always meet the requirement of laser welding.
The patent literature search of the prior art finds that the Chinese invention patent publication number is CN105364430A, discloses a laser welding method for synchronously rolling a thin plate end joint, belongs to the field of welding methods, and is used for processing and clamping a workpiece to be welded; setting the positions of the roller and a workpiece to be welded and relevant parameters; and setting technological parameters to be welded to implement welding. Compared with the traditional arc welding and the like, the efficiency and the welding speed are obviously improved, and the production cost is reduced. The heat input is reduced, the residual deformation and the residual stress are reduced, the defects are reduced, the welding hot cracking tendency of the material is reduced, air holes are eliminated, and the mechanical property and the sealing property of the joint are improved. Therefore, the method disclosed in the document and the invention belong to different inventive concepts.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a laser welding device for synchronously rolling butt joints of thin plates.
The laser welding device comprises a laser welding head, an installation adjusting mechanism, a tail protection nozzle, a laser beam, a follow-up roller, a to-be-welded butt joint and a welding leakage groove, wherein the follow-up roller and the tail protection nozzle are respectively connected to the laser welding head through the installation adjusting mechanism, the laser beam emitted by the laser welding head is positioned above the welding seam of the to-be-welded butt joint, the follow-up roller is connected to the to-be-welded butt joint, and the to-be-welded butt joint is positioned above the welding leakage groove.
In some embodiments, the plurality of follow-up rollers are respectively connected to two sides of one end of the installation adjusting mechanism, and the follow-up rollers are tightly pressed on two sides of the butt joint to be welded.
In some embodiments, a tail protection nozzle is attached to the other end of the installation adjustment mechanism.
In some embodiments, the tail protection nozzle is secured to a universal bamboo joint tube that is mounted on the mounting adjustment mechanism.
In some embodiments, the laser beam is positioned directly above the weld of the butt joint to be welded.
In some embodiments, the installation adjusting mechanism comprises a high-pressure gas cylinder, a gas pressure gauge and a cylinder piston, the high-pressure gas cylinder, the gas pressure gauge and the cylinder piston are sequentially connected through a pipeline, and the follow-up roller performs pressure adjustment through the cylinder piston.
In some embodiments, the device further comprises a supporting clamp mechanism, and a pad is arranged in the middle of the supporting clamp mechanism.
In some embodiments, the butt-joint to be welded is attached to a support fixture mechanism.
In some embodiments, the weld-leak groove is located on the support fixture mechanism.
In some embodiments, the thickness of the butt joint to be welded is 0.2 to 1.5mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention adopts the follow-up roller to fix the butt joint, eliminates the misalignment in the sheet assembly, effectively avoids the problem of misalignment increase caused by wave deformation in the welding process and reduces the assembly precision requirement.
(2) The invention adopts the rollers with constant pressure to roll the two sides of the thin plate, can effectively reduce the welding stress and the deformation of the thin plate, reduces the orthopedic cost after welding and obviously improves the fatigue performance of the welding line.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of a laser welding method of the present invention;
FIG. 2 is a schematic structural view of the installation adjustment mechanism of the present invention;
fig. 3 is a partial structural schematic diagram of the present invention.
Reference numbers in the figures:
the device comprises a laser welding head 1, an installation adjusting mechanism 2, a high-pressure gas cylinder 21, a gas pressure gauge 22, a cylinder piston 23, a tail protection nozzle 3, a laser beam 4, a follow-up roller 5, a to-be-welded butt joint 6, a supporting clamp mechanism 7 and a welding leakage groove 8.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The laser welding device for synchronously rolling the sheet butt joint comprises a laser welding head 1, an installation adjusting mechanism 2, a tail protection nozzle 3, a laser beam 4, a follow-up roller 5, a butt joint 6 to be welded, a supporting clamp mechanism 7 and a welding leakage groove 8, wherein the installation adjusting mechanism 2 is connected to the laser welding head 1, the follow-up rollers 5 are respectively connected to two sides of one end of the installation adjusting mechanism 2, the tail protection nozzle 3 is connected to the other end of the installation adjusting mechanism 2, preferably, the tail protection nozzle 3 is fixed on a universal bamboo joint pipe, and the universal bamboo joint pipe is installed on the installation adjusting mechanism 2; in the welding process, inert protective gas is synchronously blown through the tail protective nozzle 3, so that the oxidation of a welding pool and a high-temperature area of a welding seam is avoided. The follow-up rollers 5 are respectively connected with two sides of the butt joint 6 to be welded, the laser beam 4 is positioned right above the welding line of the butt joint 6 to be welded, the bottom of the welding line of the butt joint 6 to be welded is positioned on the welding leakage groove 8, the welding leakage groove 8 is positioned on the supporting clamp mechanism 7, and the supporting clamp mechanism 7 is connected with the back of the butt joint 6 to be welded. Preferably, a gasket with good heat dissipation performance is arranged in the middle of the supporting clamp mechanism 7, and the supporting clamp mechanism 7 provides back support and gas back protection for the thin plate, that is, the butt joint 1 to be welded realizes weld back protection and heat dissipation in the welding process through the supporting clamp mechanism 7.
The installation adjusting mechanism 2 comprises a high-pressure gas cylinder 21, a gas pressure gauge 22 and a cylinder piston 23, wherein the high-pressure gas cylinder 21, the gas pressure gauge 22 and the cylinder piston 23 are sequentially connected through pipelines; the high-pressure gas bottle 21 provides pressure, the pressure is transmitted to the cylinder piston 23 through the gas pressure gauge 22, and the pressure adjustment of the follower roller 5 is completed by the up-and-down reciprocating motion of the cylinder piston 23.
The working principle is as follows: the laser beam 4 is positioned right above the welding line of the butt joint 6 to be welded, the bottom of the welding line of the butt joint 6 to be welded is positioned on the welding leakage groove 8, the follow-up roller 5 is tightly pressed on two sides of the butt joint 6 to be welded, and the butt joint 6 to be welded is welded through the laser beam 4.
Example 2
The invention also provides a welding method of the laser welding device for synchronously rolling the butt joint of the thin plate, which comprises the following steps:
the method comprises the following steps: polishing or cleaning both sides of a part to be welded of the butt joint 6 to be welded with the thickness of 0.2-1.5mm, and removing oil stains on the surface;
step two: fixing the butt joint 6 to be welded on a welding tool fixture according to relevant requirements, and ensuring that the butt joint assembly gap is not more than 10% of the thickness of the sheet to be welded;
step three: arranging follow-up rollers 5 at two sides of a welding seam of a to-be-welded butt joint 6, ensuring that the distances between the two follow-up rollers 5 and the center of the welding seam are the same, adjusting the positive center of the laser beam 4 focus butt joint welding seam, wherein the vertical distance between the contact point of the follow-up roller 5 at the to-be-welded butt joint 6 and the center of the welding seam is 0.2-1 mm, the distance between the contact position of the follow-up roller 5 at the to-be-welded butt joint 6 and the laser beam 4 in the welding advancing direction is 0-50 mm, and after the position and pressing force of the follow-up roller 5 are adjusted, keeping the follow-up roller 5 and the laser welding head 1 in synchronous motion;
step four: adjusting the position of the tail protection nozzle 3, setting the flow of the protection gas to be 10L/min-30L/min, setting the laser power to be 150W-1000W, the defocusing amount of the laser to be 0-5 mm, and the welding speed to be 0.3-1.0 m/min, starting the welding device, and operating the laser welding program to finish the laser welding of the sheet butt joint.
More specifically, the laser in the present embodiment employs a gas laser, a semiconductor laser, a YAG solid-state laser, or a fiber laser, etc., wherein the welding effect with the fiber laser employing optical fiber transmission and the disc-type solid-state laser is the best because it is more flexible and efficient.
Example 3
This example 3 was completed based on example 2, and both sides of the weld of the butt joint 6 to be welded were made of materials having different thicknesses, which were otherwise the same as in example 2.
Example 4
This embodiment 4 is completed based on embodiment 1, and is fixed to the laser welding head 1 by using a support arm with adjustable pressing force, instead of installing the adjusting mechanism 2 in embodiment 1, to ensure that the pressing force is constant during the welding process, which is otherwise the same as embodiment 1.
Example 5
In this embodiment 5, taking laser welding of a 1Cr18Ni9Ti stainless steel thin plate butt joint (splice) joint with a thickness of 0.2mm as an example, the other devices adopted are: IPG YLR-500 model fiber laser, MOTOMANHP 20D model robot, PRECITEC YW welding head, the welding head equipped with 250mm focusing lens.
The welding steps are as follows:
the method comprises the following steps: pickling and passivating a 1Cr18Ni9Ti stainless steel sheet with the thickness of 0.5mm for degreasing for later use;
step two: the trimming burr of the stainless steel thin plate is upward and is arranged on a key tool, a welding leak groove 8 of the key tool is integrally made of brass, and the width of the groove is 2mm; when the thin plates are assembled, the butt joint gap of the thin plates is ensured to be less than 0.1mm;
step three: the laser guide red light is positioned at the right center of the butt welding line, the follow-up roller 5 is fixed on the laser welding head 1, and the position of the follow-up roller 5 is adjusted by using an elastic adjusting device with a space position and posture adjusting function, so that the vertical distance between the follow-up roller 5 and the contact point of the follow-up roller and the thin plate and the guide red light is 0.5-1 mm; the contact point of the light guide plate and the thin plate is positioned right ahead in the welding advancing direction, and the horizontal distance between the light guide plate and the red light guide plate is 1-5 mm; adjusting the pressing force of the follow-up roller 5 to 200-500N, and keeping synchronous motion with the laser welding head 1;
step four: argon is introduced into the welding leakage groove 8 to protect the back of the welding seam, the gas flow is 3-5L/min, the MOTOMANHP 20D type robot is used for teaching the positions of the initial point and the end point of the welding seam, and laser technological parameters are set: the laser power is 100W, the defocusing amount is plus 15mm, the welding speed is 0.5m/min, and the flow of the air blown by the tail protection side is 20-40L/min;
step five: and starting and operating a laser welding program to complete the laser welding of the butt joint of the thin plate.
After the welding is finished, the front and the back of the butt-jointed thin plate are silvery white metallic luster. X-ray radiographic inspection shows that the internal quality of the welding seam meets the requirement of a grade I welding seam specified in QJ1842A-2011, and the defects of standard-exceeding air holes, inclusions and the like are avoided.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a laser welding device that sheet metal butt joint rolled in step, its characterized in that includes laser welder head (1), installation adjustment mechanism (2), tail protection nozzle (3), laser beam (4), follow-up gyro wheel (5), treats welding butt joint (6) and weld leakage groove (8), follow-up gyro wheel (5) with tail protection nozzle (3) are respectively through installation adjustment mechanism (2) connect in on laser welder head (1), laser welder head (1) jets out laser beam (4) are located treat welding butt joint (6) welding seam top, follow-up gyro wheel (5) connect in treat welding butt joint (6) on, treat welding butt joint (6) and be located weld leakage groove (8) top.
2. The laser welding device for synchronously rolling the sheet butt joint according to claim 1, wherein a plurality of the follow-up rollers (5) are respectively connected to both sides of one end of the installation adjusting mechanism (2), and the follow-up rollers (5) are pressed against both sides of the butt joint (6) to be welded.
3. The laser welding apparatus for simultaneous lamination of thin plate butt joints according to claim 2, wherein the tail protection nozzle (3) is connected to the other end of the installation adjustment mechanism (2).
4. The laser welding device for synchronously rolling the butt joints of the thin plates according to claim 3, wherein the tail protection nozzle (3) is fixed on a universal bamboo joint pipe, and the universal bamboo joint pipe is installed on the installation adjusting mechanism (2).
5. Laser welding device for simultaneous lamination of thin plate butt joints according to claim 1, characterized in that the laser beam (4) is located directly above the weld of the butt joint (6) to be welded.
6. The laser welding device for synchronously rolling the butt joint of the thin plates according to claim 1, wherein the installation and adjustment mechanism (2) comprises a high-pressure gas cylinder (21), a gas pressure gauge (22) and a cylinder piston (23), the high-pressure gas cylinder (21), the gas pressure gauge (22) and the cylinder piston (23) are sequentially connected through a pipeline, and the follow-up roller (5) is subjected to pressure adjustment through the cylinder piston (23).
7. The laser welding device for synchronously laminating butt joints of thin plates according to claim 1, further comprising a supporting clamp mechanism (7), wherein a gasket is arranged in the middle of the supporting clamp mechanism (7).
8. Laser welding device with simultaneous rolling of sheet butt joints according to claim 7, characterized in that the butt joint (6) to be welded is connected to the support fixture mechanism (7).
9. The laser welding device for synchronously laminating butt-jointed thin plates according to claim 7, wherein the weld-out groove (8) is located on the support jig mechanism (7).
10. Laser welding device with simultaneous rolling of sheet butt joints according to claim 1, characterized in that the thickness of the butt joint (6) to be welded is 0.2-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313980.3U CN218080953U (en) | 2022-08-31 | 2022-08-31 | Laser welding device for synchronously rolling sheet butt joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313980.3U CN218080953U (en) | 2022-08-31 | 2022-08-31 | Laser welding device for synchronously rolling sheet butt joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218080953U true CN218080953U (en) | 2022-12-20 |
Family
ID=84450448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222313980.3U Active CN218080953U (en) | 2022-08-31 | 2022-08-31 | Laser welding device for synchronously rolling sheet butt joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218080953U (en) |
-
2022
- 2022-08-31 CN CN202222313980.3U patent/CN218080953U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0628375B1 (en) | Laser welding method | |
| CN103406675B (en) | A kind of slab high-strength steel laser arc hybrid welding method and fixture thereof | |
| US20100206850A1 (en) | Method and device for connecting thick-walled metal workpieces by welding | |
| CN103286444B (en) | Laser butt welding method of silicon steel sheet | |
| CN103537880B (en) | A kind of welding method of laser welder high-strength steel | |
| CN104959725A (en) | Electron beam welding deformation control method of large variable-thickness component | |
| CN106493574B (en) | A kind of the laser welding-brazing complex welding method and device of socket hollow copper tubing | |
| CN109048059B (en) | Laser scanning wire filling welding method for thin plate | |
| CN103008898B (en) | The welding method of tack-weld method, welding method and box beam | |
| CN106624362B (en) | A kind of socket hollow copper tubing preparation method and device based on laser cutting and welding | |
| CN115338536A (en) | Laser welding device and welding method for synchronously rolling sheet butt joint | |
| CN111761223A (en) | Pre-welding reversible deformation device and method for double-laser-beam bilateral synchronous welding of 5A90 aluminum lithium alloy T-shaped structure | |
| CN109128444A (en) | Prevent the welding method and device of steam head plate welding deformation | |
| CN111940905A (en) | Coaxial dual-focus laser filler wire welding method for two sides of thin-plate titanium alloy T-shaped joint | |
| CN218080953U (en) | Laser welding device for synchronously rolling sheet butt joint | |
| CN101913030A (en) | Metal plate welding equipment eliminating deformation and stress by using ultrasonic waves | |
| CN111604593A (en) | Laser mirror image welding method | |
| CN108015421A (en) | A kind of welding procedure of electrical switchgear aluminium alloy box | |
| CN115446455B (en) | Corner laser welding method based on power follow-up control | |
| CN107243694A (en) | A kind of stitch welding of automobile galvanized sheet | |
| CN107081528A (en) | A kind of method for laser welding of high-grade pipe line steel | |
| CN103008950B (en) | Tool capable of applying pressure to carry out electron beam auxiliary heat action connection | |
| CN105364430A (en) | Laser welding method capable of realizing synchronous rolling of edge joints of sheets | |
| CN115121953A (en) | Laser powder filling welding method and system for thick plate narrow-gap annular light spot optical fiber | |
| JP2001269785A (en) | Coil for tailored blank material, method and device for manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |