Welding device for improving quality of start-stop section of laser filler wire tailor-welding

Abstract

The utility model belongs to the technical field of welding, and particularly relates to a welding device for improving the quality of a start-stop section of laser filler wire tailored welding, which comprises a base, a lifting mechanism is arranged at the top of the base, a welding mechanism is arranged on the lifting mechanism in a sliding manner, and a fastening mechanism is sleeved on the outer wall of the welding mechanism. The sliding rod is connected with the support through the external threads, the threaded sleeve and the first spring, the bottom of the sliding rod is connected with the clamping plate, and the wire feeding pipe is inserted into the clamping plate, so that the position of the wire feeding pipe can be adjusted by adjusting the threaded sleeve to meet different welding position and angle requirements, and wire feeding accuracy and stability are guaranteed; and due to the arrangement of the limiting plates, the movable blocks and the adjusting bolts on the clamping plates, the wire feeding pipe can be positioned and fixed more finely. And the position of the movable block can be changed by adjusting the adjusting bolt, so that the wire feeding pipe is clamped or loosened, and the wire feeding pipe can be conveniently adjusted and fixed under different working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of welding technology, specifically relating to a welding device for improving the quality of the start and end sections of laser filler wire welding. Background Technology

[0002] In modern manufacturing, laser wire filler welding technology is widely used in many fields such as automobiles, aerospace, and shipbuilding, playing a key role in connecting metal sheets of different materials or thicknesses.

[0003] Traditional laser wire-feeding welding devices often lack precise and stable control over the start and end points of the welding process. During wire feeding, the fixed and rigid position of the wire feed tube makes it difficult to adjust flexibly according to different welding conditions. With the diversification of welding plate specifications and materials, the fixed position of the wire feed tube cannot accurately match the welding point, resulting in significant deviations in the position of the wire delivery. This leads to inconsistent fusion quality in the initial stage of welding, easily causing defects such as incomplete fusion and porosity, which seriously affect the strength and sealing of the weld. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a welding device for improving the quality of the start and end sections of laser wire filler welding. To achieve the above objectives, it solves the problem that existing laser wire filler welding devices lack precise and stable control over the start and end sections of welding.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a welding device for improving the quality of the start and end sections of laser filler wire welding, including a base, a lifting mechanism on the top of the base, a welding mechanism slidably mounted on the lifting mechanism, and a fastening mechanism sleeved on the outer wall of the welding mechanism;

[0006] The welding mechanism includes a laser welding head, a bracket, a sliding rod, an external thread, a threaded sleeve, a first spring, a clamping plate, a wire feed tube, a limiting plate, a movable block, an adjusting bolt, a mounting cylinder, and a heat insulation cap. The bottom of the outer wall of the laser welding head is fixedly fitted with a bracket. One side wall of the bracket has a sliding hole for the sliding rod to slide through. The bottom outer wall of the sliding rod has an external thread, and a threaded sleeve is threadedly connected to the outer wall of the external thread. A first spring is arranged around the outer wall of the external thread, and both ends of the first spring abut against the threaded sleeve and the bracket, respectively. A clamping plate is fixedly connected to the bottom of the sliding rod, and a wire feed tube is inserted into the clamping plate. A set of limiting plates is fixedly connected to the bottom of the clamping plate near the sliding rod. The two limiting plates are L-shaped, and a movable block is movably connected between the two limiting plates. A threaded hole for the adjusting bolt is threaded through the outer side of the limiting plate. A mounting cylinder is fixedly fitted in the middle of the movable block, and a heat insulation cap is movably connected to the top of the upper end of the mounting cylinder. The heat insulation cap is inserted into the wire feed tube.

[0007] Furthermore, a resistance wire is installed on the inner ring surface of the mounting cylinder, a heat-conducting cylinder is sleeved inside the mounting cylinder, and the heat-conducting cylinder is interference-fitted with the heat insulation cap.

[0008] Specifically, the heat generated by the resistance wire is transferred to the heat insulation cap through the heat-conducting cylinder, which can preheat the wire feeding tube. This is a specific technical means to improve the quality of the start and end sections of laser filler wire welding. It helps the welding wire reach a suitable temperature before entering the welding area, thereby improving the melting effect and welding fusion.

[0009] Furthermore, the lifting mechanism includes a support plate, a cylinder, a sliding seat, a slide rail, a mounting plate, and a sleeve rod. The top of the base is fixedly provided with a support plate, which is L-shaped. A cylinder is provided on the top of the support plate. The telescopic end of the cylinder is connected to the sliding seat by bolts. A slide rail is provided on the left side wall of the support plate. The sliding seat is slidably disposed with the slide rail. A mounting plate is fixedly connected to the side wall of the sliding seat away from the slide rail by bolts. A sleeve rod is connected to the outer wall of the mounting plate.

[0010] Specifically, the cylinder extends and retracts, causing the sliding seat to slide on the slide rail, thereby raising and lowering the sleeve rod connected to the mounting plate. The slide rail ensures the smooth movement of the sliding seat, which plays a crucial role in the precise height adjustment and stability of the welding mechanism during the welding process, and is an important support for achieving high-quality laser wire filler welding at the start and end points.

[0011] Furthermore, a limiting seat is slidably provided on the sleeve rod, and the surface of the limiting seat is provided with a mounting hole for the laser welding head to slide on. The limiting seat is provided with bolts that can be fixed to the laser welding head.

[0012] Specifically, the position of the laser welding head can be flexibly adjusted and fixed through the mounting holes and fixing bolts on the limit seat, thereby better controlling the welding position and ensuring that the laser welding head can be accurately aligned with the welding area during the welding start and end sections and throughout the entire welding process, further improving the welding quality.

[0013] Furthermore, the fastening mechanism includes a fixed seat, a threaded rod, a rotating shaft, a limiting cavity, a threaded groove, a limiting block, and a top rod. The fixed seat is fitted onto the bottom of the outer wall of the laser welding head. A rotating shaft is provided on the side wall of the fixed seat. A threaded rod is fixedly connected to the top of the rotating shaft. A threaded groove is provided in the fixed seat for the threaded rod to slide. A limiting cavity is provided in the inner cavity of the fixed seat, and the limiting cavity is connected to the threaded groove. A top rod is fixed to the top of the threaded rod. A limiting block is provided on the top of the top rod. The limiting block is slidably disposed in the limiting cavity. The other side wall of the limiting block abuts against the laser welding head.

[0014] Specifically, the threaded rod is moved by rotating the shaft, causing the push rod and the limiting block to exert a resistance force on the laser welding head to achieve fastening. This fastening mechanism effectively prevents the laser welding head from shaking or shifting during the welding process, which is crucial for ensuring the quality and precision of the welding start and end sections.

[0015] Furthermore, the diameter of the push rod is larger than the diameter of the threaded rod, and a spring is sleeved on the outer wall of the push rod, with the spring located inside the limiting cavity;

[0016] Specifically, the presence of the spring provides a buffering force for the tightening process, ensuring sufficient tightening force to prevent the welding head from shaking while avoiding damage to the laser welding head due to over-tightening. This extends the service life of the welding head and also helps maintain the welding head in a stable working state, thus improving welding quality.

[0017] Furthermore, the wire feeding tube extends through the clamping plate to between the two limiting plates, and the top of the adjusting bolt extends to the side wall of the movable block;

[0018] Specifically, the fixing degree of the wire feeding tube can be flexibly adjusted by adjusting the bolts, ensuring the stability and accuracy of wire feeding, thereby improving the wire feeding quality of the start and end sections of laser filler wire welding, which plays an important role in improving the overall welding quality.

[0019] Furthermore, a mounting bracket is fixedly connected to one side of the bottom of the fixed base, and the mounting bracket has a slot for the wire feeding tube to pass through.

[0020] Specifically, the wire feeding tube is arranged reasonably and stably in the device, and its coordination with other components is better. This can effectively avoid problems such as uneven wire feeding caused by unstable position of the wire feeding tube during the wire feeding process, and improve the quality of the start and end sections of laser filler wire welding.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The sliding rod of this invention is connected to the bracket via an external thread, a threaded sleeve, and a first spring. A clamping plate is connected to the bottom of the sliding rod, and a wire feeding tube is inserted into the clamping plate. The position of the wire feeding tube can be adjusted by adjusting the threaded sleeve to adapt to different welding positions and angles, ensuring the accuracy and stability of wire feeding and thus improving the quality of laser wire filling welding. The limiting plate, movable block, and adjusting bolt on the clamping plate allow for more precise positioning and fixation of the wire feeding tube. By adjusting the adjusting bolt, the position of the movable block can be changed, thereby clamping or loosening the wire feeding tube, facilitating adjustment and fixation of the wire feeding tube under different working conditions. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the external structure of the present utility model;

[0025] Figure 2 Another view of the overall structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the welding mechanism of this utility model.

[0027] Figure 4 This is a structural diagram of the combination of the adjusting bolt and the movable block of this utility model;

[0028] Figure 5 This is a schematic diagram of the lifting mechanism structure of this utility model;

[0029] Figure 6 This is a cross-sectional view of the fastening mechanism of this utility model.

[0030] In the diagram: 1. Base; 2. Lifting mechanism; 201. Support plate; 202. Cylinder; 204. Sliding seat; 205. Slide rail; 206. Mounting plate; 207. Sleeve rod; 3. Fastening mechanism; 301. Fixed seat; 302. Rotating shaft; 303. Threaded groove; 304. Threaded rod; 305. Top rod; 306. Limiting cavity; 307. Limiting block; 4. Welding mechanism; 401. Limiting seat; 402. Laser welding head; 403. Bracket; 404. Slide rod; 405. External thread; 406. First spring; 407. Threaded sleeve; 408. Limiting plate; 409. Clamping plate; 410. Mounting bracket; 412. Wire feeding tube; 413. Heat insulation cap; 414. Mounting cylinder; 415. Movable block; 416. Adjusting bolt. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1 to 6This utility model provides a technical solution: a welding device for improving the quality of the start and end sections of laser filler wire welding, including a base 1, a lifting mechanism 2 is provided on the top of the base 1, a welding mechanism 4 is slidably provided on the lifting mechanism 2, and a fastening mechanism 3 is sleeved on the outer wall of the welding mechanism 4.

[0033] The welding mechanism 4 includes a laser welding head 402, a bracket 403, a slide rod 404, an external thread 405, a threaded sleeve 407, a first spring 406, a clamping plate 409, a wire feeding tube 412, a limiting plate 408, a movable block 415, an adjusting bolt 416, a mounting cylinder 414, and a heat insulation cap 413. The bracket 403 is fixedly mounted on the bottom of the outer wall of the laser welding head 402. A sliding hole for sliding connection of the slide rod 404 is opened on one side wall of the bracket 403. An external thread 405 is opened on the bottom outer wall of the slide rod 404. A threaded sleeve 407 is threadedly connected to the outer wall of the external thread 405. A first spring 406 is arranged around the outer wall of the external thread 405. The two ends of 06 abut against the threaded sleeve 407 and the bracket 403 respectively. The bottom of the slide rod 404 is fixedly connected to the clamping plate 409. The clamping plate 409 is inserted into the feed tube 412. The bottom of the clamping plate 409 near the slide rod 404 is fixedly connected to a set of limiting plates 408. The two limiting plates 408 are L-shaped and the two limiting plates 408 are movably connected to a movable block 415. The outer side of the limiting plate 408 is provided with a threaded hole for the threaded connection of the adjusting bolt 416. The middle of the movable block 415 is fixedly provided with an installation cylinder 414. The top of the upper end of the installation cylinder 414 is movably connected to a heat insulation cap 413. The heat insulation cap 413 is inserted into the feed tube 412.

[0034] Among them: a resistance wire is installed on the inner ring surface of the mounting cylinder 414, a heat-conducting cylinder is sleeved inside the mounting cylinder 414, and the heat-conducting cylinder is interference-fitted with the heat insulation cap 413.

[0035] The lifting mechanism 2 includes a support plate 201, a cylinder 202, a sliding seat 204, a slide rail 205, a mounting plate 206, and a sleeve rod 207. The support plate 201 is fixedly installed on the top of the base 1. The support plate 201 is L-shaped. The cylinder 202 is installed on the top of the support plate 201. The extension end of the cylinder 202 is connected to the sliding seat 204 by bolts. The slide rail 205 is installed on the left side wall of the support plate 201. The sliding seat 204 is slidably installed with the slide rail 205. The mounting plate 206 is fixedly connected to the side wall of the sliding seat 204 away from the slide rail 205 by bolts. The sleeve rod 207 is connected to the outer wall of the mounting plate 206.

[0036] Among them: a limiting seat 401 is slidably provided on the sleeve rod 207, and the surface of the limiting seat 401 is provided with a mounting hole for the laser welding head 402 to slide on, and the limiting seat 401 is provided with a bolt that can be fixed to the laser welding head 402.

[0037] The fastening mechanism 3 includes a fixed seat 301, a threaded rod 304, a rotating shaft 302, a limiting cavity 306, a threaded groove 303, a limiting block 307, and a top rod 305. The fixed seat 301 is fitted onto the bottom of the outer wall of the laser welding head 402. The rotating shaft 302 is provided on the side wall of the fixed seat 301. The threaded rod 304 is fixedly connected to the top of the rotating shaft 302. The threaded groove 303 is provided in the fixed seat 301 for the threaded rod 304 to slide. The limiting cavity 306 is provided in the inner cavity of the fixed seat 301 and is connected to the threaded groove 303. The top of the threaded rod 304 is fixedly provided with a top rod 305. The top of the top rod 305 is provided with a limiting block 307. The limiting block 307 is slidably disposed in the limiting cavity 306. The other side wall of the limiting block 307 abuts against the laser welding head 402.

[0038] Wherein: the diameter of the push rod 305 is larger than the diameter of the threaded rod 304, the outer wall of the push rod 305 is fitted with a spring, and the spring is located in the limiting cavity 306.

[0039] Wherein: the wire feeding tube 412 extends through the clamping plate 409 to between the two limiting plates 408, and the top of the adjusting bolt 416 extends to the side wall of the movable block 415.

[0040] Among them, a mounting bracket 410 is fixedly connected to one side of the bottom of the fixed base 301, and the mounting bracket 410 has a hole or groove for the wire feeding tube 412 to pass through.

[0041] The working principle of the above embodiment is as follows: Based on the workpiece thickness and welding process requirements, the control system activates the cylinder 202 of the lifting mechanism 2. The telescopic end of the cylinder 202 drives the sliding seat 204 to rise or fall along the slide rail 205, thereby adjusting the sleeve 207 on the mounting plate 206 to a suitable height. At this time, the limit seat 401 on the sleeve 207 and the welding mechanism 4 also move to the corresponding height. The operator can use measuring tools or laser rangefinders to precisely adjust the vertical distance between the welding mechanism 4 and the workpiece surface, ensuring that the laser welding head 402 is at the optimal starting welding height.

[0042] Rotating the shaft 302 of the fastening mechanism 3 causes the threaded rod 304 to move within the threaded groove 303. The push rod 305 drives the limiting block 307 to move towards the laser welding head 402 until the limiting block 307 tightly contacts the laser welding head 402. The spring in the limiting cavity 306 provides a certain buffer to ensure that the laser welding head 402 will not shake or shift due to equipment vibration or other external forces during the initial welding stage. The laser welding head 402 slides and adjusts its position through the mounting holes on the limiting seat 401 and is fixed with bolts to ensure precise alignment with the welding part of the workpiece.

[0043] The wire feeding system is activated, and the wire feeding tube 412 begins to feed the welding wire. Simultaneously, the resistance wire on the inner annular surface of the mounting cylinder 414 is energized, generating heat which is transferred to the heat insulation cap 413 via a heat-conducting cylinder. The heat insulation cap 413 preheats the welding wire within the wire feeding tube 412. Since the wire feeding tube 412 extends through the clamping plate 409 between the two limiting plates 408, and the movable block 415 can be finely adjusted via the adjusting bolt 416 to fix the wire feeding tube, the stability and accuracy of the wire feeding are ensured. The preheated welding wire melts more easily, helping to improve the fusion quality at the beginning of the welding process and reducing defects such as incomplete fusion and porosity. When the welding is nearing completion and reaches the predetermined welding end position, the control system first shuts down the wire feeding system, stopping the wire feeding tube 412 from feeding the welding wire. Subsequently, the resistance wire on the inner ring surface of the mounting cylinder 414 is de-energized, stopping the preheating of the heat insulation cap 413 and the wire feeding tube 412, allowing the welding area to cool down naturally. The rotating shaft 302 of the fastening mechanism 3 is rotated to loosen the fastening of the laser welding head 402, and the laser welding head 402 is slid back to its initial position through the limit seat 401 and fixed with bolts.

[0044] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welding device for improving the quality of laser welding with filler wire of the start and end sections of tailor-welded blanks, comprising a base (1), characterized in that: The top of the base (1) is provided with a lifting mechanism (2), a welding mechanism (4) is slidably arranged on the lifting mechanism (2), and the outer wall of the welding mechanism (4) is sleeved with a fastening mechanism (3); The welding mechanism (4) comprises a laser welding head (402), a support (403), a sliding rod (404), an external thread (405), a threaded sleeve (407), a first spring (406), a clamping plate (409), a wire feeding pipe (412), a limiting plate (408), a movable block (415), an adjusting bolt (416), a mounting cylinder (414) and a heat insulation cap (413), the outer wall bottom of the laser welding head (402) is fixedly provided with the support (403), one side wall of the support (403) is provided with a sliding hole for slidably connecting the sliding rod (404), the bottom outer wall of the sliding rod (404) is provided with the external thread (405), the outer wall of the external thread (405) is threadedly connected with the threaded sleeve (407), the outer wall of the external thread (405) is provided with the first spring (406) in a surrounding manner, and the two ends of the first spring (406) are respectively in abutment with the threaded sleeve (407) and the support (403), the bottom of the sliding rod (404) is fixedly connected with the clamping plate (409), the clamping plate (409) is insertedly provided with the wire feeding pipe (412), one end of the clamping plate (409) close to the sliding rod (404) is fixedly connected with a group of limiting plates (408), the two limiting plates (408) are in L-shaped, and the movable block (415) is movably connected between the two limiting plates (408), the outer side of the limiting plate (408) is provided with a threaded hole for threadedly connecting the adjusting bolt (416), the middle of the movable block (415) is fixedly provided with the mounting cylinder (414), the upper end top of the mounting cylinder (414) is movably connected with the heat insulation cap (413), and the heat insulation cap (413) is insertedly provided with the wire feeding pipe (412).

2. The welding device for improving the quality of the laser filling and welding of the start and end sections of the tailor-welded blank according to claim 1, characterized in that: The inner annular surface of the mounting cylinder (414) is mounted with a resistance wire, the mounting cylinder (414) is sleeved with a heat conduction cylinder, and the heat conduction cylinder is in interference fit with the heat insulation cap (413).

3. The welding device for improving laser filling wire spliced welding start and end section quality according to claim 1, characterized in that: The lifting mechanism (2) comprises a support plate (201), an air cylinder (202), a sliding seat (204), a sliding rail (205), a mounting plate (206) and a sleeve rod (207), the top of the base (1) is fixedly provided with the support plate (201), the support plate (201) is in L-shaped, the top of the support plate (201) is provided with the air cylinder (202), the telescopic end of the air cylinder (202) is connected with the sliding seat (204) through bolts, the left side wall of the support plate (201) is provided with the sliding rail (205), the sliding seat (204) and the sliding rail (205) are slidably arranged, the side wall, away from the sliding rail (205), of the sliding seat (204) is fixedly connected with the mounting plate (206) through bolts, and the outer wall of the mounting plate (206) is connected with the sleeve rod (207).

4. The welding device for improving the quality of the laser filling and welding of the start and end sections of the tailor-welded blank according to claim 3, characterized in that: The sleeve rod (207) is slidably provided with a limiting seat (401), the surface of the limiting seat (401) is provided with a mounting hole for slidably arranging a laser welding head (402), and the limiting seat (401) is provided with a bolt which can be fixed with the laser welding head (402).

5. The welding device for improving laser filling wire spliced welding start and end section quality according to claim 1, characterized in that: The fastening mechanism (3) comprises a fixing seat (301), a threaded rod (304), a rotating shaft (302), a limiting cavity (306), a threaded groove (303), a limiting block (307) and a jacking rod (305), the outer wall of the laser welding head (402) is sleeved with the fixing seat (301), the side wall of the fixing seat (301) is provided with the rotating shaft (302), the top of the rotating shaft (302) is fixedly connected with the threaded rod (304), the fixing seat (301) is provided with the threaded groove (303) for slidably connecting the threaded rod (304), the inner cavity of the fixing seat (301) is provided with the limiting cavity (306), and the limiting cavity (306) is in communication with the threaded groove (303), the top of the threaded rod (304) is fixedly provided with the jacking rod (305), the top of the jacking rod (305) is provided with the limiting block (307), the limiting block (307) is slidably arranged in the limiting cavity (306), and the other side wall of the limiting block (307) abuts against the laser welding head (402).

6. The welding device for improving laser filling wire spliced welding start and end section quality according to claim 5, characterized in that: The diameter of the jacking rod (305) is greater than that of the threaded rod (304), the outer wall of the jacking rod (305) is sleeved with a spring, and the spring is arranged in the limiting cavity (306).

7. The welding device of claim 1, wherein: The wire feeding pipe (412) extends through the clamping plate (409) to between the two limiting plates (408), and the top of the adjusting bolt (416) extends to the side wall of the movable block (415).

8. The welding device for improving laser filling wire spliced welding start and end section quality according to claim 5, characterized in that: The bottom of the fixing seat (301) is fixedly connected with a mounting bracket (410), and the mounting bracket (410) is provided with a hole slot for penetrating the wire feeding pipe (412).

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