CN215999104U - Rolling device and laser welding equipment - Google Patents
Rolling device and laser welding equipment Download PDFInfo
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- CN215999104U CN215999104U CN202121315912.XU CN202121315912U CN215999104U CN 215999104 U CN215999104 U CN 215999104U CN 202121315912 U CN202121315912 U CN 202121315912U CN 215999104 U CN215999104 U CN 215999104U
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Abstract
The embodiment of the utility model discloses a rolling device and laser welding equipment, wherein the rolling device comprises a rack, a vacuum clamp, a rolling mechanism and a driving mechanism, wherein the vacuum clamp is used for adsorbing and fixing a first sheet-shaped workpiece; the rolling mechanism comprises a rolling assembly and a driving assembly, the driving assembly is used for driving the rolling assembly to abut against the second flaky workpiece, the rolling assembly comprises a roller, the driving mechanism is used for driving the rolling mechanism to move along the second direction so that the roller can abut against the second flaky workpiece to roll, and then the roller can abut against the second flaky workpiece while rolling so as to keep the second flaky workpiece and the first flaky workpiece tightly attached to each other, so that the interlayer gap between the second flaky workpiece and the first flaky workpiece is eliminated, and the interlayer pressing effect is good. The rolling device is applied to the laser welding equipment, so that the consistency of the welding effect of the laser device can be kept due to better interlayer pressing precision, and the welding quality of the laser welding equipment is improved.
Description
Technical Field
The utility model relates to the technical field of laser welding, in particular to a rolling device and laser welding equipment.
Background
The laser device is a high-efficiency precision welding device which uses a laser beam with high energy density as a heat source. The device can be applied to the precision welding of products, and in order to meet the requirement of higher-level precision welding of the products, auxiliary devices such as a pressing device and the like are arranged to be matched with the welding work of a laser device.
The pressing device is a device for pressing the welding plate, and can press two plates between layers through the pressing device so that the welding plate can be welded by the laser device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a rolling device and laser welding equipment, and aims to solve the technical problems that the laser welding effect is inconsistent and the laser welding quality is insufficient due to the poor interlayer pressing effect of the existing pressing device on a welding plate.
In a first aspect, the present invention provides a rolling apparatus comprising:
a frame;
the vacuum clamp is arranged on the rack and used for adsorbing and fixing the first flaky workpiece;
the rolling mechanism comprises a rolling component and a driving component, the driving component is connected with the rolling component and is used for driving the rolling component to move along a first direction so that the rolling component is abutted against a second sheet-shaped workpiece and the second sheet-shaped workpiece is abutted against the first sheet-shaped workpiece, and the rolling component comprises a roller which is matched with the second sheet-shaped workpiece in a rolling way; and
and the driving mechanism is arranged on the rack, is connected with the rolling mechanism and is used for driving the rolling mechanism to move along a second direction so that the roller can be abutted against the second sheet workpiece to roll, and the first direction and the second direction form an included angle.
In one embodiment, the driving assembly comprises two driving members, and the two driving members are connected with the rack and the rolling assembly and are oppositely arranged on two sides of the rolling assembly.
In one embodiment, the driving member is a cylinder, and the driving member is connected with the rolling assembly through a floating joint.
In one embodiment, the rolling assembly further includes a fixing frame, the fixing frame is connected to the driving assembly, the roller is installed on one side of the fixing frame close to the vacuum clamp, and the driving assembly is arranged close to the vacuum clamp relative to the fixing frame.
In one embodiment, the fixing frame is provided with a space avoiding portion, and the space avoiding portion is used for avoiding a laser beam emitted by the laser device.
In one embodiment, the vacuum chuck comprises a pallet for carrying the first sheet workpiece and a positioning assembly coupled to the pallet for positioning the first sheet workpiece on the pallet.
In one embodiment, the positioning assembly comprises a first positioning block and a second positioning block, the first positioning block is connected with the supporting plate and used for abutting against the first sheet-shaped workpiece moving along a third direction, the second positioning block is connected with the supporting plate and used for abutting against the first sheet-shaped workpiece moving along a fourth direction, and an included angle is formed between the third direction and the fourth direction.
In one embodiment, the vacuum clamp further comprises a vacuum pipeline, the supporting plate is provided with a plurality of adsorption holes, and the vacuum pipeline is communicated with the adsorption holes.
In one embodiment, the contact surface of the roller and the second sheet-shaped workpiece is provided with an elastic layer.
In a second aspect, the present invention further provides a laser welding apparatus, including a laser device and the rolling device of any one of the above embodiments, wherein the rolling device is configured to attach the first sheet-shaped workpiece to the second sheet-shaped workpiece, and the laser device is configured to laser weld the first sheet-shaped workpiece to the second sheet-shaped workpiece.
The embodiment of the utility model has the following beneficial effects:
by adopting the rolling device, the driving mechanism drives the rolling mechanism to move along the second direction, so that the roller can be abutted against the second sheet-shaped workpiece to roll, the roller is abutted against the second sheet-shaped workpiece while rolling relative to the second sheet-shaped workpiece, the second sheet-shaped workpiece and the first sheet-shaped workpiece are tightly attached, the interlayer gap between the second sheet-shaped workpiece and the first sheet-shaped workpiece is eliminated, and the interlayer laminating effect is good.
The rolling device is applied to the laser welding equipment, the first flaky workpiece and the second flaky workpiece can be attached to each other by the rolling device, so that the interlayer gap between the second flaky workpiece and the first flaky workpiece is eliminated, the interlayer pressing precision is high, the consistency of the welding effect of the laser device can be kept, and the welding quality of the laser welding equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
figure 1 is a schematic view of a rolling apparatus in one embodiment.
Figure 2 is a front view of the rolling apparatus shown in figure 1.
Figure 3 is a side view of the rolling apparatus shown in figure 1.
Figure 4 is a top view of the rolling apparatus shown in figure 1.
Figure 5 is a schematic view of the roller plate, mounting plate and rollers of the rolling apparatus shown in figure 1.
Figure 6 is a schematic view of a first sheet-like workpiece and a second sheet-like workpiece of the rolling apparatus of figure 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, a rolling apparatus according to an embodiment is mainly used for eliminating an interlayer gap of a sheet-shaped workpiece to improve welding quality of a laser apparatus, and includes a frame 100, a vacuum fixture 200, a rolling mechanism 300, and a driving mechanism 400, where the vacuum fixture 200 is disposed on the frame 100 and is used for fixing a first sheet-shaped workpiece 10 by suction, so as to clamp and fix the first sheet-shaped workpiece 10.
The rolling mechanism 300 comprises a rolling assembly 310 and a driving assembly 320, wherein the driving assembly 320 is connected with the rolling assembly 310 and is used for driving the rolling assembly 310 to move along a first direction, so that the rolling assembly 310 abuts against the second sheet-shaped workpiece 20, so that the second sheet-shaped workpiece 20 abuts against the first sheet-shaped workpiece 10, so that the second sheet-shaped workpiece 20 is attached to the first sheet-shaped workpiece 10 and fixed, and a gap between the second sheet-shaped workpiece 20 and the first sheet-shaped workpiece 10 is eliminated, the rolling assembly 310 comprises a roller 311, and the roller 311 is used for being matched with the second sheet-shaped workpiece 20 in a rolling manner.
The driving mechanism 400 is disposed on the frame 100, and the driving mechanism 400 is connected to the rolling mechanism 300 and is configured to drive the rolling mechanism 300 to move along the second direction, so that the roller 311 can roll on the second sheet-shaped workpiece 20, and after the rolling mechanism 300 is driven by the driving mechanism 400 to move, the roller 311 can roll and support against the second sheet-shaped workpiece 20, so as to maintain the second sheet-shaped workpiece 20 attached to the first sheet-shaped workpiece 10, and the first direction and the second direction form an included angle.
It can be understood that, the rolling mechanism 300 is driven by the driving mechanism 400 to move along the second direction, so that the roller 311 can abut against the second sheet-shaped workpiece 20 to roll, and further the roller 311 abuts against the second sheet-shaped workpiece 20 while rolling, so as to keep the second sheet-shaped workpiece 20 and the first sheet-shaped workpiece 10 tightly attached to each other, so as to eliminate the interlayer gap between the second sheet-shaped workpiece 20 and the first sheet-shaped workpiece 10, and the interlayer pressing effect is good.
Therefore, the position where the roller 311 abuts against the second sheet-like workpiece 20 can realize a stable interlayer lamination effect between the second sheet-like workpiece 20 and the first sheet-like workpiece 10, and when the position of the second sheet-like workpiece 20 pressed and held by the roller 311 is laser-welded by a laser device, the consistency of the laser welding between the second sheet-like workpiece 20 and the first sheet-like workpiece 10 can be maintained.
Further, the first direction and the second direction are perpendicular to each other, so that the direction in which the roller 311 pushes the second sheet-like workpiece 20 by rolling is perpendicular to the direction in which the roller 311 is driven by the driving mechanism 400 to move, and the rolling device can further improve the stability of the second sheet-like workpiece 20 in the fitting process with the first sheet-like workpiece 10.
In this embodiment, referring to fig. 6, the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 may be glass, plastic, or other sheet-shaped workpieces, and the rolling device in this embodiment may eliminate the gap between the stacked glass sheets, plastic films, or other sheets.
The first sheet workpiece 10 may have a size larger than that of the second sheet workpiece 20 to roll the second sheet workpiece 20 against the first sheet workpiece 10 to laser weld the second sheet workpiece 20 and the first sheet workpiece 10 to achieve the joining of the second sheet workpiece 20 to the first sheet workpiece 10.
Of course, in other embodiments, the size of the first sheet workpiece 10 may also be the same as the size of the second sheet workpiece 20, or the size of the first sheet workpiece 10 may also be smaller than the size of the second sheet workpiece 20.
In one embodiment, with continued reference to fig. 1-4, the frame 100 includes a bottom plate 110 and a vertical plate 120, the bottom plate 110 is disposed on the horizontal working surface and is used for supporting the rolling device and the driving mechanism 400, and the vertical plate 120 is disposed perpendicular to the bottom plate 110 and is used for supporting the vacuum chuck 200.
The driving mechanism 400 can adjust the moving speed of the roller 311 during rolling the second sheet-like workpiece 20 at will, thereby effectively ensuring the pressing effect between the second sheet-like workpiece 20 and the first sheet-like workpiece 10.
In one embodiment, the driving assembly 320 includes two driving members 321, and the two driving members 321 connect the frame 100 and the rolling assembly 310 and are oppositely disposed at two sides of the rolling assembly 310.
Through the relative arrangement of the two driving members 321 on the two sides of the rolling assembly 310, the stability of the driving movement of the driving assembly 320 on the rolling assembly 310 can be maintained, the pressures at the two ends can be effectively balanced, and the pressing uniformity of the rolling assembly 310 on the second sheet-shaped workpiece 20 and the first sheet-shaped workpiece 10 can be ensured.
Of course, in other embodiments, four, six or more driving members 321 may be provided, and it should be noted that a plurality of driving members 321 need to be oppositely disposed on two sides of the rolling assembly 310 to ensure the stability of the driving movement of the driving assembly 320 to the rolling assembly 310.
In one embodiment, with continued reference to fig. 1-5, the driving member 321 is a cylinder, and the driving member 321 is connected to the rolling assembly 310 through a floating joint 322. Through the setting of floating joint 322, can avoid the cylinder flexible during operation of both sides, the atress that the motion is asynchronous to cause is different, can keep two cylinders flexible during operation, to the coordinated stability that rolling assembly 310 drive removed.
Further, the driving assembly 320 further includes an adapter plate 323 and a connecting block 324, the adapter plate 323 connects the driving member 321 and the movable end of the driving mechanism 400, and the connecting block 324 connects the floating joint 322 and the telescopic end of the driving member 321.
Preferably, four floating joints 322 are symmetrically arranged on two sides of the rolling assembly 310, so as to further improve the stability of the driving movement of the rolling assembly 310.
It should be noted that in fig. 1 to 4, the floating joint 322 is separated from the telescopic head of the cylinder, and the floating joint 322 can be connected with the telescopic head of the cylinder through a connecting member to assemble the driving member 321 with the floating joint 322 so as to connect the driving member 321 with the rolling assembly 310.
In one embodiment, the rolling assembly 310 further includes a fixing frame 312, the fixing frame 312 is connected to the driving assembly 320, a roller 311 is installed on one side of the fixing frame 312 close to the vacuum chuck 200, and the driving assembly 320 is disposed close to the vacuum chuck 200 relative to the fixing frame 312.
By arranging the driving assembly 320 at a side close to the vacuum clamp 200, the driving assembly 320 and the driving mechanism 400 occupy a smaller space, which is beneficial to the miniaturization of the rolling device, thereby improving the compatibility of the rolling device for different devices.
When the rolling device is used in cooperation with the laser device, the driving assembly 320 and the driving mechanism 400 can be prevented from interfering with relevant parts of the laser device arranged above the rolling assembly, and the spatial arrangement of the rolling device and the laser device is facilitated.
In an embodiment, the fixing frame 312 is provided with a clearance 3121, and the clearance 3121 is used for avoiding a laser beam emitted by the laser device. Through the clearance 3121, a laser beam emitted from a laser device can be made to pass through the clearance 3121 to reach the surface of the second sheet-like workpiece 20 to achieve laser welding of the second sheet-like workpiece 20 with the first sheet-like workpiece 10.
In one embodiment, the fixing bracket 312 includes a connecting plate 3122 and a roller plate 3123, the connecting plate 3122 is provided at both ends thereof with a floating joint 322, the connecting plate 3122 is provided with a fitting groove for mounting the roller plate 3123, the roller plate 3123 is provided with a space-avoiding groove to form a space-avoiding portion 3121, the roller plate 3123 can be fitted in the fitting groove such that the space-avoiding portion 3121 can communicate with the fitting groove, and the roller 311 is mounted on the side of the roller plate 3123 adjacent to the vacuum chuck 200. The rolling position of the second sheet-like workpiece 20 can be adjusted by replacing the roller plate 3123 and the rollers 311.
Further, the roller plate 3123 is detachably connected to the connection plate 3122 by a connection member.
Further, referring to fig. 5, the fixing frame 312 further includes a mounting plate 3124, and the roller 311 is fixed on the roller plate 3123 through the mounting plate 3124.
Of course, in other embodiments, the connecting plate 3122 and the roller plate 3123 may be integrally formed to increase the overall structural strength of the fixing frame 312, enable the roller 311 to provide higher rolling pressure, and maintain stable operation of the rolling device.
In one embodiment, the vacuum chuck 200 includes a pallet 210 and a positioning assembly 220, the pallet 210 being configured to carry the first sheet workpiece 10, and the positioning assembly 220 being coupled to the pallet 210 and configured to position the first sheet workpiece 10 on the pallet 210. The positioning assembly 220 facilitates stable positioning and fixing of the first sheet-like workpiece 10 on the pallet 210.
Further, the positioning assembly 220 includes a first positioning block 221 and a second positioning block 222, the first positioning block 221 is connected to the supporting plate 210 and is configured to abut against the first sheet-shaped workpiece 10 moving along the third direction, the second positioning block 222 is connected to the supporting plate 210 and is configured to abut against the first sheet-shaped workpiece 10 moving along the fourth direction, and an included angle is formed between the third direction and the fourth direction. By defining the position of the first sheet-like workpiece 10 in two directions, the stability of the placement of the first sheet-like workpiece 10 on the pallet 210 can be ensured.
Preferably, the first positioning block 221 and the second positioning block 222 are detachably connected to the pallet 210, respectively, and can be adjusted by fixing positions of the first positioning block 221 and the second positioning block 222 on the pallet 210, so as to adjust a positioning position of the first sheet-shaped workpiece 10 on the pallet 210.
Preferably, the positioning assembly 220 is a structural member made of POM material, and the third direction is perpendicular to the fourth direction, so that the stable positioning of the first sheet-like workpiece 10 on the supporting plate 210 can be further improved, the relative position of the product can be effectively positioned, and the product can be further effectively prevented from being damaged by sliding.
It can be understood that the sizes of the first positioning block 221 and the second positioning block 222 can be adjusted according to the size of the first sheet-shaped workpiece 10, and the size of the first positioning block 221 can be set to be larger than the size of the second positioning block 222, so that the first positioning block 221 is used for limiting the long side of the first sheet-shaped workpiece 10, and the second positioning block 222 is used for limiting the short side of the first sheet-shaped workpiece 10.
Of course, in other embodiments, the first positioning block 221 and the second positioning block 222 can be connected to each other to improve the positioning stability of the positioning assembly 220 on the first sheet-shaped workpiece 10, and at this time, the first positioning block 221 and the second positioning block 222 can be connected to form an L-shaped positioning element.
In an embodiment, the vacuum fixture 200 further includes a vacuum pipeline, and the supporting plate 210 is provided with a plurality of suction holes, and the vacuum pipeline is communicated with the plurality of suction holes. The air pressure in the vicinity of the suction holes is reduced by the vacuum line to hold the first sheet-like workpiece 10 pressed and fixed on the pallet 210 by the external atmospheric pressure.
Through the adsorption and fixation of the vacuum clamp 200 on the first flaky workpiece 10, the first flaky workpiece 10 can be prevented from shaking on the vacuum clamp 200, and meanwhile, the risk of sliding injury of the first flaky workpiece 10 product is effectively avoided.
Further, the vacuum chuck 200 further includes a pipe connector 230, and the pipe connector 230 is used for connecting the vacuum pipe and the suction hole of the pallet 210.
Further, a vacuum chamber is disposed in the supporting plate 210, and the vacuum chamber communicates with the suction hole and the pipeline joint 230, so that the vacuum pipeline, the pipeline joint 230, the vacuum chamber and the suction hole can communicate with each other, so as to clamp and fix the first sheet workpiece 10 by the vacuum clamp 200.
In an embodiment, an elastic layer is disposed on a contact surface of the roller 311 and the second sheet-like workpiece 20, and through the arrangement of the elastic layer, the roller 311 can be prevented from damaging the surface of the second sheet-like workpiece 20 when being in rolling contact with the second sheet-like workpiece 20, thereby ensuring the forming quality of a product after the second sheet-like workpiece 20 is welded and combined with the first sheet-like workpiece 10.
Further, the elastic layer is a rubber layer to make the roller 311 into a rubber wheel.
Referring to fig. 1 and fig. 2, a laser welding apparatus according to an embodiment is mainly used for welding sheet-shaped workpieces, and includes a laser device and a rolling device according to any of the above embodiments, where the rolling device is used for bonding a first sheet-shaped workpiece 10 to a second sheet-shaped workpiece 20, and the laser device is used for laser welding the first sheet-shaped workpiece 10 to the second sheet-shaped workpiece 20.
The rolling device of any one of the embodiments is applied to the laser welding equipment, and the rolling device can attach the first sheet-shaped workpiece 10 to the second sheet-shaped workpiece 20, so that the interlayer gap between the second sheet-shaped workpiece 20 and the first sheet-shaped workpiece 10 is eliminated, the interlayer lamination precision is good, the consistency of the welding effect of the laser device can be kept, and the welding quality of the laser welding equipment is further improved.
In this embodiment, the laser welding apparatus effectively removes the fit gap between the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 by the rolling device according to the process welding principle of rolling while welding, and can adapt to the laser welding of the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 of different sizes according to the rolling mechanism 300 and the vacuum fixture 200, so that the installation and debugging are convenient, the operation is simple, and the application is very convenient. The problem of the traditional product spare pressfitting that has special requirement, need carry out auxiliary device research and development alone, and then lead to product manufacturing cost too high, product cycle is longer is solved.
The laser welding equipment of this embodiment can be applied to the product laser welding that requires very high to product pressfitting clearance, is fit for the quantization production of product, and the production manufacturing efficiency of product is higher.
When the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 are glass sheets, by applying the laser welding apparatus of the embodiment, gap bubbles existing between the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 can be avoided through the rolling device, so that high-quality welding of the laser device to the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 can be ensured, and meanwhile, the welding strength between the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20 can be higher, thereby realizing seamless splicing of the first sheet-shaped workpiece 10 and the second sheet-shaped workpiece 20.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.
Claims (10)
1. A rolling apparatus, comprising:
a frame;
the vacuum clamp is arranged on the rack and used for adsorbing and fixing the first flaky workpiece;
the rolling mechanism comprises a rolling component and a driving component, the driving component is connected with the rolling component and is used for driving the rolling component to move along a first direction so that the rolling component is abutted against a second sheet-shaped workpiece and the second sheet-shaped workpiece is abutted against the first sheet-shaped workpiece, and the rolling component comprises a roller which is matched with the second sheet-shaped workpiece in a rolling way; and
and the driving mechanism is arranged on the rack, is connected with the rolling mechanism and is used for driving the rolling mechanism to move along a second direction so that the roller can be abutted against the second sheet workpiece to roll, and the first direction and the second direction form an included angle.
2. The rolling press apparatus of claim 1, wherein the drive assembly comprises two drive members coupled to the frame and the rolling assembly and disposed opposite each other on opposite sides of the rolling assembly.
3. The rolling press apparatus of claim 2, wherein the drive member is a pneumatic cylinder, the drive member being connected to the rolling assembly by a floating joint.
4. The rolling press device according to claim 1, wherein the rolling assembly further comprises a fixed frame, the fixed frame is connected with the driving assembly, the roller is installed on one side of the fixed frame close to the vacuum fixture, and the driving assembly is arranged close to the vacuum fixture relative to the fixed frame.
5. The rolling press device according to claim 4, wherein the fixing frame is provided with a space avoiding portion for avoiding a laser beam emitted by the laser device.
6. The rolling apparatus of claim 1 wherein the vacuum fixture includes a pallet for carrying the first sheet workpiece and a positioning assembly coupled to the pallet for positioning the first sheet workpiece on the pallet.
7. The rolling device according to claim 6, wherein the positioning assembly comprises a first positioning block and a second positioning block, the first positioning block is connected to the supporting plate and is configured to abut against the first sheet-shaped workpiece moving along a third direction, the second positioning block is connected to the supporting plate and is configured to abut against the first sheet-shaped workpiece moving along a fourth direction, and the third direction is disposed at an angle to the fourth direction.
8. The rolling apparatus according to claim 6, wherein the vacuum fixture further comprises a vacuum line, the supporting plate is provided with a plurality of suction holes, and the vacuum line is communicated with the plurality of suction holes.
9. The rolling press of claim 1, wherein the contact surface of the roller with the second sheet-like workpiece is provided with a resilient layer.
10. A laser welding apparatus comprising a rolling device according to any one of claims 1 to 9 and a laser device for joining the first sheet-like workpiece and the second sheet-like workpiece, the laser device being for laser welding the first sheet-like workpiece and the second sheet-like workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121315912.XU CN215999104U (en) | 2021-06-11 | 2021-06-11 | Rolling device and laser welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121315912.XU CN215999104U (en) | 2021-06-11 | 2021-06-11 | Rolling device and laser welding equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215999104U true CN215999104U (en) | 2022-03-11 |
Family
ID=80524720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121315912.XU Active CN215999104U (en) | 2021-06-11 | 2021-06-11 | Rolling device and laser welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215999104U (en) |
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2021
- 2021-06-11 CN CN202121315912.XU patent/CN215999104U/en active Active
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