Laser welding clamp pressing plate

Abstract

The utility model discloses a laser welding clamp pressing plate which comprises a clamp framework plate, a pressing head is arranged on the clamp framework plate, the bottom of the pressing head is used for pressing a part to be welded, the pressing head is provided with a laser incidence opening, an air inlet and a dust suction opening, and the laser incidence opening penetrates through the bottom of the pressing head so as to weld the part. The gas inlet is obliquely formed in the pressure head, one end of the gas inlet is communicated with the end, close to the part, of the laser incidence port, the gas inlet is communicated with a gas source of protective gas and used for conveying the protective gas to the welded position of the part, one end of the dust suction port is communicated with the laser incidence port, and the dust suction port is communicated with a negative pressure source; by means of the mode, the dust suction port can be close to a welding area, so that smoke generated during welding is sucked away in time, and the laser welding effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, and in particular to a laser welding fixture pressure plate. Background Technology

[0002] Laser welding technology, due to its high precision and efficiency, is widely used for lap welding of precision thin metal materials (such as 150μm stainless steel and 80μm titanium-copper). Current technologies generally employ a "clamp + surface dust collection hood" structure, where the clamp presses the parts to be welded and an external dust collection hood removes welding fumes. However, this structure has significant drawbacks: the dust collection port is far from the welding area (usually more than 10mm), making it difficult to effectively absorb the high-temperature metal vapor and plasma generated during laser welding. This results in residual fumes that not only scatter or refract the laser beam and interfere with welding accuracy, but also adhere to the surface of the clamp's weld holes, obstructing the laser path and reducing the strength of the weld joint. Some improvements attempt to shorten the dust collection distance by thinning the clamp's pressure plate to increase efficiency, but this sacrifices the plate's rigidity, easily causing gaps in the welding of multi-cavity thin parts, exacerbating welding quality fluctuations. Furthermore, the continuous accumulation of fumes on the clamp surface requires frequent shutdowns for cleaning, resulting in high maintenance costs and severely restricting production efficiency. Existing technologies have not yet achieved efficient adsorption and stable control of welding fumes while ensuring the rigidity of the fixture. There is an urgent need for a precision laser welding fixture that balances structural strength and dust collection performance to resolve the aforementioned contradictions. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a laser welding fixture pressure plate that allows the dust suction port to be close to the welding area, thereby timely removing the fumes and dust generated during welding and ensuring the laser welding effect.

[0004] To solve the above-mentioned technical problems, the present invention provides a laser welding fixture pressure plate, comprising: a fixture frame plate, a pressure head disposed on the fixture frame plate, the bottom of the pressure head being used to press the parts to be welded, the pressure head having a laser inlet, an air inlet, and a dust extraction port, the laser inlet penetrating the bottom of the pressure head to weld the parts, the air inlet being obliquely disposed on the pressure head, one end of the air inlet being connected to the end of the laser inlet near the parts, the air inlet being connected to a protective gas source for delivering protective gas to the welding area of ​​the parts, one end of the dust extraction port being connected to the laser inlet, and the dust extraction port being connected to a negative pressure source.

[0005] Preferably, the fixture frame plate is provided with a mounting plate, and the mounting plate has a mounting hole for mounting the pressure head. The pressure head is set in the mounting hole. A first air pipe connector is provided on one side of the mounting plate and is connected to a negative pressure source. An air suction channel is provided inside the mounting plate. One end of the air suction channel is connected to the first air pipe connector and the other end of the air suction channel is connected to the dust suction port.

[0006] Preferably, the mounting plate has a negative pressure common rail channel, which is connected to the first air pipe connector. Multiple mounting holes are provided, and a sidewall is formed between the multiple mounting holes. The air intake channel is opened in the sidewall.

[0007] Preferably, a second air pipe connector is provided on one side of the mounting plate, which is connected to the gas source of the protective gas. An air intake channel is provided inside the mounting plate, with one end of the air intake channel connected to the second air pipe connector and the other end of the air intake channel connected to the air inlet.

[0008] Preferably, the mounting plate is provided with a cover plate, which is used to restrict the position of the pressure head in the mounting hole. The cover plate has a clearance hole, which is set towards the laser inlet on the pressure head so that the laser can directly enter the laser inlet on the pressure head to weld the parts to be welded.

[0009] Preferably, a spring groove is provided on the side of the pressure head near the cover plate, and a pressure spring is provided in the spring groove. One end of the pressure spring abuts against the bottom of the spring groove, and the other end of the pressure spring abuts against the side of the cover plate near the pressure head.

[0010] Preferably, a limiting groove is provided on the side wall near the pressure head, and a limiting block is provided on the side of the pressure head near the limiting groove. The limiting block and the limiting groove cooperate to limit the position of the pressure head in the mounting hole.

[0011] Preferably, the pressure head has flanges extending outward on both sides, and the pressure head is mounted on the mounting plate using the flanges on both sides.

[0012] Preferably, the bottom of the pressure head extends with a pressing part, which contacts the part to be welded to stabilize the position of the part.

[0013] The beneficial effects of this utility model are: by opening the laser inlet, air inlet and dust suction port on the pressure head that is in direct contact with the part to be welded, the distance between the air inlet and dust suction port and the welding area is greatly shortened. Furthermore, by opening the air inlet channel and the air suction channel on the mounting plate and connecting them with the corresponding protective gas source and negative pressure source, a connection channel is provided for the protective gas and the removal of fumes generated during welding, thereby reducing the difficulty of processing and connection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model with the cover plate removed;

[0016] Figure 3 This is a perspective view of the pressure head of this utility model;

[0017] Figure 4 This is a cross-sectional view showing the positional relationship between the negative pressure common rail channel and the intake channel of this utility model;

[0018] Figure 5 This is a cross-sectional view showing the positional relationship between the air intake channel and the air intake port of this utility model.

[0019] The components in the attached diagram are labeled as follows:

[0020] 1. Fixture frame plate;

[0021] 2. Pressure head; 21. Laser entrance port; 22. Air inlet; 23. Dust suction port; 24. Spring groove; 25. Pressure spring; 26. Limiting block; 27. Flange; 28. Pressing part;

[0022] 3. Mounting plate; 31. Mounting hole; 32. First air pipe connector; 321. Inhalation channel; 322. Negative pressure common rail channel; 33. Side wall; 331. Limiting groove; 34. Second air pipe connector; 341. Inlet channel; 4. Cover plate; 41. Clearance hole. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0030] Example:

[0031] refer to Figures 1-3A laser welding fixture pressure plate includes: a fixture frame plate 1, on which a pressure head 2 is tightly fitted. The bottom of the pressure head 2 is used to press the parts to be welded. The pressure head 2 has a laser inlet 21, an air inlet 22, and a dust extraction port 23. The laser inlet 21 extends from the top to the bottom of the pressure head 2, allowing the laser to pass through the laser inlet 21 to weld the parts pressed by the pressure head 2. The air inlet 22 is obliquely opened on the pressure head 2, so that one end of the air inlet 22 is closer to the parts to be welded. One end of the air inlet 22 is connected to the end of the laser inlet 21 near the parts. The air inlet 22 is connected to a protective shield. The gas source is connected to deliver protective gas to the welding area of ​​the part, thereby preventing oxidation of the welding area during the welding process. One end of the dust suction port 23 is connected to the laser entrance port 21, and the dust suction port 23 is connected to the negative pressure source. By controlling the position of the dust suction port 23 on the pressure head 2, that is, controlling the distance between the dust suction port 23 and the end of the laser entrance port 21 near the part, the distance between the dust suction port 23 and the welding area can be effectively controlled. This can make the distance between the dust suction port 23 and the welding area less than 10mm, or even closer, thereby effectively removing the fumes from the welding area and improving the laser welding effect.

[0032] refer to Figures 1-4 A mounting plate 3 is installed on the fixture frame plate 1. The mounting plate 3 has mounting holes 31 for mounting the pressure head 2. The pressure head 2 is pressed into the mounting holes 31 in a tight fit manner. A first air pipe connector 32 is installed on one side of the mounting plate 3, and the first air pipe connector 32 is connected to a negative pressure source. An air intake channel 321 is provided inside the mounting plate 3. One end of the air intake channel 321 is connected to the first air pipe connector 32, and the other end is connected to a dust extraction port 23. Thus, the fumes generated during welding enter the air intake channel 321 through the dust extraction port 23 and are sucked into the negative pressure source. The dust extraction port 23 and the air inlet 22 are not at the same height, thus avoiding excessive suction of protective gas that has not yet arrived. Preferably, the end of the air inlet 22 closer to the part is closer to the part than the dust extraction port 23.

[0033] refer to Figures 1-4 To facilitate welding of multiple parts in one clamping or welding multiple parts simultaneously, multiple mounting holes 31 are provided, and sidewalls 33 are formed between the multiple mounting holes 31. A negative pressure common rail channel 322 is provided on the mounting plate 3. The negative pressure common rail channel 322 is connected to the first air pipe connector 32. One end of the suction channel 321 is opened in the sidewall 33, so that the smoke and dust generated by the parts at each pressure head 2 during welding are uniformly sucked into the negative pressure common rail channel 322 and then sucked away from the negative pressure common rail channel 322 by the negative pressure source.

[0034] refer to Figure 1 , Figure 2 , Figure 3 and Figure 5A second gas pipe connector 34 is installed on one side of the mounting plate 3. The second gas pipe connector 34 is connected to the gas source of the protective gas. An air inlet channel 341 is opened inside the mounting plate 3. One end of the air inlet channel 341 is connected to the second gas pipe connector 34, and the other end of the air inlet channel 341 is connected to the air inlet 22. Thus, the protective gas acts directly on the welding area during welding, avoiding oxidation of the welding area.

[0035] refer to Figure 1 and Figure 2 To further stabilize the position of the pressure head 2, a cover plate 4 is bolted to the mounting plate 3. The cover plate 4 restricts the position of the pressure head 2 in the mounting hole 31, that is, the cover plate 4 presses down on the top of the pressure head 2, thereby preventing the pressure head 2 from falling off. The cover plate 4 has a clearance hole 41, which faces the laser entrance port 21 on the pressure head 2, so that the laser can directly pass through the clearance hole 41 and enter the laser entrance port 21 on the pressure head 2 to weld the parts to be welded.

[0036] refer to Figures 1-3 A spring groove 24 is provided on the side of the pressure head 2 near the cover plate 4. A pressure spring 25 is placed in the spring groove 24. One end of the pressure spring 25 abuts against the bottom of the spring groove 24, and the other end of the pressure spring 25 abuts against the side of the cover plate 4 near the pressure head 2, thereby pressing the pressure head 2 firmly onto the mounting plate 3. At the same time, the pressure head 2 will not damage the parts.

[0037] refer to Figure 2 and Figure 3 A limiting groove 331 is provided on the side wall 33 near the pressure head 2, and a limiting block 26 is provided on the side of the pressure head 2 near the limiting groove 331. The limiting block 26 cooperates with the limiting groove 331 to limit the position of the pressure head 2 in the mounting hole 31, thereby further ensuring the accuracy of the position of the pressure head 2, and thus ensuring that the laser can pass through the laser entrance port 21 to reach the area to be welded, and ensuring the smooth connection between the air inlet 22, the dust suction port 23 and the air inlet channel 341 and the air suction channel 321.

[0038] refer to Figure 2 and Figure 3 The pressure head 2 has flanges 27 extending outward on both sides. The pressure head 2 rests on the mounting plate 3 using the flanges 27 on both sides, thereby limiting the maximum distance that the pressure head 2 can move toward the part and avoiding overpressure on the part. It can also stabilize the position of the pressure head 2 on the mounting plate 3.

[0039] refer to Figure 3 The bottom of the pressure head 2 extends a pressing part 28, which contacts the part to be welded to stabilize the position of the part.

[0040] Operation process: Place the entire device on the part to be welded, so that the pressure head 2 presses the part to be welded. The laser entrance port 21 is aligned with the welding area of ​​the part. The welding laser passes through the laser entrance port 21 to reach the welding area and weld the part. At the same time, the protective gas is blown into the welding area through the air inlet 22 to prevent oxidation of the welding area. Meanwhile, the dust suction port 23 sucks away the fumes generated during welding to ensure the welding effect.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A laser welding fixture pressure plate, characterized in that, include: A fixture frame plate (1) is provided with a pressure head (2). The bottom of the pressure head (2) is used to press the parts to be welded. The pressure head (2) has a laser inlet (21), an air inlet (22) and a dust extraction port (23). The laser inlet (21) penetrates the bottom of the pressure head (2) to weld the parts. The air inlet (22) is obliquely opened on the pressure head (2). One end of the air inlet (22) is connected to the end of the laser inlet (21) near the parts. The air inlet (22) is connected to the source of protective gas and is used to deliver protective gas to the part to be welded. One end of the dust extraction port (23) is connected to the laser inlet (21) and is connected to the negative pressure source.

2. The laser welding fixture pressure plate according to claim 1, characterized in that: The fixture frame plate (1) is provided with a mounting plate (3), and the mounting plate (3) is provided with a mounting hole (31) for mounting a pressure head (2). The pressure head (2) is set in the mounting hole (31). A first air pipe connector (32) is provided on one side of the mounting plate (3). The first air pipe connector (32) is connected to a negative pressure source. An air suction channel (321) is provided inside the mounting plate (3). One end of the air suction channel (321) is connected to the first air pipe connector (32), and the other end of the air suction channel (321) is connected to the dust suction port (23).

3. The laser welding fixture pressure plate according to claim 2, characterized in that: The mounting plate (3) is provided with a negative pressure common rail channel (322), which is connected to the first air pipe connector (32). Multiple mounting holes (31) are provided, and a side wall (33) is formed between the multiple mounting holes (31). The air intake channel (321) is opened in the side wall (33).

4. A laser welding fixture pressure plate according to claim 2, characterized in that: A second air pipe connector (34) is provided on one side of the mounting plate (3). The second air pipe connector (34) is connected to the gas source of the protective gas. An air inlet channel (341) is provided inside the mounting plate (3). One end of the air inlet channel (341) is connected to the second air pipe connector (34), and the other end of the air inlet channel (341) is connected to the air inlet (22).

5. A laser welding fixture pressure plate according to claim 2, characterized in that: The mounting plate (3) is provided with a cover plate (4), which is used to restrict the position of the pressure head (2) in the mounting hole (31). The cover plate (4) is provided with a clearance hole (41), which is set towards the laser inlet (21) on the pressure head (2) so that the laser can directly enter the laser inlet (21) on the pressure head (2) to weld the parts to be welded.

6. A laser welding fixture pressure plate according to claim 5, characterized in that: The pressure head (2) has a spring groove (24) on the side near the cover plate (4). A pressure spring (25) is provided in the spring groove (24). One end of the pressure spring (25) abuts against the bottom of the spring groove (24), and the other end of the pressure spring (25) abuts against the side of the cover plate (4) near the pressure head (2).

7. A laser welding fixture pressure plate according to claim 3, characterized in that: A limiting groove (331) is provided on the side wall (33) near the pressure head (2), and a limiting block (26) is provided on the side of the pressure head (2) near the limiting groove (331). The limiting block (26) cooperates with the limiting groove (331) to limit the position of the pressure head (2) in the mounting hole (31).

8. A laser welding fixture pressure plate according to claim 2, characterized in that: The pressure head (2) has flanges (27) extending outward on both sides, and the pressure head (2) is mounted on the mounting plate (3) using the flanges (27) on both sides.

9. A laser welding fixture pressure plate according to claim 1, characterized in that: The bottom of the pressure head (2) extends a pressing part (28), which contacts the part to be welded to stabilize the position of the part.

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