Thin plate tailor-welding tool for laser welding
By introducing a back shielding gas channel and a positioning slider into the laser welding tooling, the problem of oxidation under the weld was solved, the welding quality was improved and the positioning accuracy was increased, ensuring the stability of the weld during the welding process.
Patent Information
- Application Number
- CN202422424019.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-09
AI Technical Summary
During the laser welding process, the lack of effective gas protection measures under the weld leads to oxidation, which affects the weld quality.
A thin plate welding fixture for laser welding was designed, which includes a base plate, a positioning channel, a back shielding gas channel and a clamping device. Shielding gas is introduced into the bottom of the weld through dense air jet holes, and a positioning slider and a flexible pressure plate are used to ensure positioning accuracy and weld protection during the welding process.
It effectively prevents oxidation under the weld, improves welding quality, enhances positioning accuracy, and maintains weld stability and close contact during welding, thereby improving the stability of the welding machine quality.
Smart Images
Figure CN223382809U_ABST
Abstract
Description
Technical field
[0001] The utility model relates to the field of laser welding, in particular to a thin plate welding tool for laser welding. [Background Technology]
[0002] Laser welding, a highly efficient and precise welding method that utilizes a laser beam as a heat source, is a key application of laser material processing technology. Laser welding technology boasts short action time, high efficiency, fast speed, minimal deformation, high weld quality and precision, and ease of automation. Furthermore, laser welding can connect a wide range of materials, offering advantages unmatched by other fusion welding processes. Traditional laser welding typically introduces shielding gas only above the weld seam. The lack of effective gas shielding below the weld seam can easily lead to oxidation, which can affect weld quality. [Utility Model Content]
[0003] The utility model provides a thin plate tailor welding tool for laser welding, which solves the problem that the weld quality is affected by lack of effective gas protection measures under the weld during laser welding.
[0004] The utility model is realized by the following technical scheme, and provides a thin plate welding tool for laser welding, comprising: a base plate arranged on a workbench, the base plate being used for placing a test plate to be welded, a positioning channel being opened in the middle position of the base plate, the positioning channel being used for positioning the weld position of the test plate to be welded; a back shielding gas channel, the back shielding gas channel being symmetrically arranged on both sides of the base plate close to the weld, the back shielding gas channel being connected to the positioning channel through densely arranged air jet holes, the air jet holes being used for introducing shielding gas into the weld through the positioning channel; a pressing device, the pressing device being symmetrically arranged on the left and right sides of the base plate, the pressing device being used for splicing and pressing the test plates to be welded.
[0005] Furthermore, a positioning slider adapted to the left and right distances thereof is placed in the positioning channel. The positioning slider is raised and lowered in the positioning channel by a cylinder or a manual mechanical device. When the positioning slider is raised, the top extends out of the lower surface of the test plate to be welded, and is used to position the test plate to be welded.
[0006] Furthermore, the cross-sectional area of the back shielding gas channel / the total area of the air injection holes is ≥0.8.
[0007] Furthermore, a pressure plate beam, a pressure cylinder for providing power to the pressure plate beam, a connecting plate, a pressure plate and a support plate, the pressure cylinder is symmetrically arranged on the left and right sides of the base plate, the bottom of the pressure cylinder is fixed to the workbench through a base, a center axis is provided on the base, the center axis is used to rotate the pressure cylinder, the support plate is arranged on the workbench on the rear side of the base plate, a rotating shaft is provided on the support plate, one end of the pressure plate beam is rotatably connected to the top of the pressure cylinder, and the other end is rotatably connected to the connecting plate through a rotating component, the end of the rotating shaft is connected to the rotating component, the pressure plate is arranged at the end of the connecting plate away from the pressure plate beam, and the pressure plate is pressed against the test plate to be welded under the action of the pressure plate beam through the rotating component.
[0008] Furthermore, the rotating component is a bearing.
[0009] Furthermore, the pressing plate is a right-angled trapezoid, with its oblique side facing the direction of the weld.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] (1) The back shielding gas channel and the positioning channel are connected through densely arranged air jet holes. When the shielding gas is introduced into the back shielding gas channel, the air jet holes are arranged small and densely, so that the air flow velocity can be slow and evenly sprayed to the center position below the weld, thereby preventing oxidation below the weld during welding and improving welding quality;
[0012] (2) By setting a positioning slider, the accuracy of positioning the test plate to be welded can be enhanced, so that the positioning slider can be raised and lowered in the positioning channel to maintain a close fit, and when the positioning slider is raised, the channel below the air jet hole of the back shielding gas channel can be effectively closed to prevent the shielding gas from overflowing from below;
[0013] (3) Since the connecting plate between the pressure plate crossbeam and the pressure plate has a certain degree of flexibility, the pressure plate drives the two test plates to be welded to slide toward the middle of the tooling while pressing down, so that the two test plates to be welded still have a certain compressive stress when they are in close contact, so as to ensure that the deformation of the test plates during the welding process will not cause a welding gap between the two welded test plates, thereby improving the stability of the welding machine and tooling quality.
Brief Description of the Drawings
[0014] Figure 1 This is a front view of the welding fixture of Example 1 provided by the present utility model;
[0015] In the accompanying drawings, 1. pressure plate beam; 2. rotating shaft; 3. pressure plate; 4. pressure cylinder; 5. test plate to be welded; 6. back shielding gas channel; 7. base plate; 8. positioning slider; 9. connecting plate; 10. support plate; 11. center axis; 12. rotating parts. [Specific implementation method]
[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.
[0017] See also Figure 1 The utility model provides a thin plate tailor welding tool for laser welding, comprising: a base plate 7, a back protection gas channel 6 and a pressing device;
[0018] The base plate 7 is set on the workbench. The base plate 7 is used to place the test plate 5 to be welded. A positioning channel is opened in the middle position of the base plate 7. The positioning channel is used to locate the weld position of the test plate 5 to be welded. The back shielding gas channel 6 is symmetrically arranged on both sides of the base plate 7 close to the weld. The back shielding gas channel 6 is connected to the positioning channel through densely arranged air jet holes. The air jet holes are used to introduce shielding gas to the weld position through the positioning channel, and the air jet holes are arranged small and dense, so that the air flow velocity is slow and evenly sprayed to the center of the weld. The clamping device is symmetrically placed on the left and right sides of the base plate 7. The clamping device is used to splice and clamp the test plates 5 to be welded.
[0019] Specifically, a positioning slider 8 adapted to the left and right distance of the positioning channel is placed in the positioning channel. The positioning slider 8 is lifted and lowered in the positioning channel by a cylinder or a manual mechanical device, wherein the manual mechanical device can be a screw lifting mechanism with a handle. The positioning slider 8 fits tightly with the positioning channel during operation. When the positioning slider 8 is raised, the top of the positioning slider 8 extends out of the lower surface of the test plate 5 to be welded, which can enhance the accuracy of positioning the test plate 5 to be welded, and close the channel below the jet hole of the back shielding gas channel 6 to prevent the shielding gas from overflowing from below.
[0020] Specifically, the cross-sectional area of the back shielding gas channel 6 / the total area of the air injection holes is ≥0.8, so that the pressure in the shielding gas channel can be greater than the gas pressure below the weld outside the channel, thereby maintaining the stability of the shielding gas flow rate in the channel.
[0021] Specifically, the clamping device includes a pressure plate beam 1, a pressure cylinder 4, a connecting plate 9, a pressure plate 3 and a support plate 10. The pressure cylinder 4 is symmetrically arranged on the left and right sides of the base plate 7, and the bottom of the pressure cylinder 4 is fixed to the workbench through a base. A center axis 11 is provided on the base. The center axis 11 can enable the pressure cylinder 4 to rotate along the center axis 11. The support plate 10 is arranged on the workbench on the rear side of the base plate 7. A rotating shaft 2 is provided on the support plate 10. One end of the pressure plate beam 1 is rotatably connected to the top of the pressure cylinder 4, and the other end is rotatably connected to the connecting plate 9 through a rotating component 12. The end of the rotating shaft 2 is connected to the rotating component 12. The pressure plate 3 is arranged at the end of the connecting plate 9 away from the pressure plate beam 1, and the connecting plate 9 has a certain flexibility. In this embodiment, the rotating component 12 is a bearing.
[0022] A support plate 10 is provided on the workbench behind the base plate 7 to fix the rotating shaft 2. When the pressure cylinder 4 is extended or retracted, the central shaft 11 on the base can be used to drive the pressure cylinder 4 to rotate, thereby preventing the pressure cylinder 4 from getting stuck when the rotating shaft 2 and the pressure plate beam 1 are performing circular motion during the extension and retraction process. At the same time, the lifting and lowering of the pressure cylinder 4 can drive the pressure plate beam 1 to rotate, thereby enabling the pressure plate 3 to achieve the purpose of pressing the test plate 5 to be welded through the rotating component 12 under the action of the pressure plate beam 1. In addition, the pressure plate 3 and the test plate 5 to be welded are in surface contact, and the middle part of the pressure plate 3 has a certain degree of flexibility. During the downward pressing process, it will be converted into a force squeezing toward the center of the weld, so that no gap will be generated in the weld during the welding process, thereby ensuring the stability of the welding machine quality.
[0023] Specifically, the pressing plate 3 is a right-angled trapezoid, with its oblique side facing the weld seam. By setting the oblique side of the pressing plate 3 to face the weld seam, the welding protective cover can be prevented from being affected during operation.
[0024] Working process:
[0025] (1) The right pressure cylinder retracts, driving the right pressure plate to lift up, and the cylinder is used to raise the positioning slide. Then, the test plate to be welded is placed on the right base plate, and the test plate to be welded is pressed tightly from the right side so that there is no gap between the test plate to be welded and the positioning slide.
[0026] (2) Extend the right pressure cylinder to drive the right pressure plate beam downward, so that the pressure plate presses the welding test plate 1 tightly. While pressing downward, the pressure plate drives the welding test plate 1 to slide toward the middle of the tooling, so that the test plate 1 to be welded is in close contact with the positioning slider;
[0027] (3) The left pressure cylinder retracts, driving the left pressure plate to lift up, and the positioning slide is lowered by the cylinder, and the second test plate to be welded is placed from the left side, and the test plates are pressed tightly from the left side so that there is no gap between the second test plate to be welded and the first test plate to be welded;
[0028] (4) Extend the left pressure cylinder to drive the left pressure plate beam downward, so that the pressure plate presses the welding test plate 2 tightly. At the same time, the pressure plate drives the welding test plate 2 to slide toward the middle of the tooling while pressing downward;
[0029] (5) Before welding, the shielding gas is filled into the back shielding gas channel. The shielding gas diffuses to the bottom of the weld position of the welding test plate through the small holes on the back shielding gas channel, thereby protecting the weld from oxidation during the welding process.
Claims
1. A thin plate welding tool for laser welding, characterized in that: include: A base plate (7) is provided on a workbench, the base plate (7) being used to place a test plate (5) to be welded, a positioning channel being provided in the middle of the base plate (7), the positioning channel being used to position the weld seam of the test plate (5) to be welded; A back shielding gas channel (6), the back shielding gas channel (6) being symmetrically arranged on both sides of the base plate (7) near the weld, the back shielding gas channel (6) being connected to the positioning channel via densely arranged air injection holes, the air injection holes being used to introduce shielding gas into the weld through the positioning channel; A pressing device, the pressing device being symmetrically placed on the left and right sides of the base plate (7), and the pressing device being used for splicing and pressing the test plate (5) to be welded; A positioning slide block (8) adapted to the left and right distances of the positioning channel is placed in the positioning channel, and the positioning slide block (8) is lifted and lowered in the positioning channel by a cylinder or a manual mechanical device. When the positioning slide block (8) is lifted, the top portion thereof extends beyond the lower surface of the test plate (5) to be welded, thereby positioning the test plate (5) to be welded; The cross-sectional area of the back protection gas channel (6) / the total area of the air injection holes is ≥0.
8.
2. The laser welding tool for thin plates according to claim 1, characterized in that: The pressing device comprises: a pressing plate beam (1), a pressure cylinder (4) for providing power to the pressing plate beam (1), a connecting plate (9), a pressing plate (3) and a supporting plate (10), wherein the pressure cylinder (4) is symmetrically arranged on the left and right sides of the base plate (7), the bottom of the pressure cylinder (4) is fixed to the workbench through a base, and a central axis (11) is arranged on the base, and the central axis (11) is used to rotate the pressure cylinder (4), and the supporting plate (10) is arranged on the working surface of the rear side of the base plate (7). On the platform, a rotating shaft (2) is provided on the support plate (10), one end of the pressure plate beam (1) is rotatably connected to the top of the pressure cylinder (4), and the other end is rotatably connected to the connecting plate (9) through a rotating component (12), the end of the rotating shaft (2) is connected to the rotating component (12), and the pressure plate (3) is arranged at the end of the connecting plate (9) away from the pressure plate beam (1), and the pressure plate (3) is pressed by the pressure plate beam (1) through the rotating component (12) to achieve the purpose of pressing the test plate (5) to be welded.
3. The laser welding tool for thin plates according to claim 2, characterized in that: The rotating component (12) is a bearing.
4. The thin plate tailor welding tool for laser welding according to claim 2 or 3, characterized in that: The pressing plate (3) is a right-angled trapezoid, with its hypotenuse facing the direction of the weld.