Laser welding tool for automobile silencer production

Abstract

The invention discloses a laser welding tool for automobile silencer production, and belongs to the technical field of silencer production. The laser welding tool comprises a machining platform, a laser welding arm is arranged on the upper surface of the machining platform, and a containing disc used for containing a workpiece is arranged at the center of the upper surface of the machining platform; a fixing plate is fixedly connected to the lower surface of the machining platform, a clamping mechanism is arranged between the lower surface of the containing disc and the machining platform, and the clamping mechanism clamps workpieces through rotation of a rotating arm contained in the clamping mechanism. According to the laser welding tool for automobile silencer production, a rotating arm in the clamping mechanism is driven to rotate under the action of the weight of a workpiece, so that the workpiece is rotationally clamped through a clamping plate, when the workpiece is placed, a suction cup can primarily suck the workpiece, the workpiece can be stably placed, and in the clamping process of the clamping mechanism, the workpiece can be stably placed through the suction cup; and the negative pressure adsorption mechanism can be synchronously driven to operate, gas on the inner sides of the suction cups is pumped out, and the adsorption force of the suction cups to workpieces is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of muffler production, and specifically to a laser welding tooling for automobile muffler production. Background Art

[0002] An automobile muffler is a key component of the exhaust system, and its main functions are to reduce the engine exhaust noise and ensure the safe discharge of high-temperature exhaust gas. In traditional processes, the muffler shell is often connected by crimping or riveting to reduce air leakage, while the welding of the frame needs to ensure a firm structure. With the development of technology, laser welding has gradually become a key technology in muffler manufacturing due to its characteristics of high precision and low deformation.

[0003] Prior art one (a Chinese patent with publication number CN220388313U and publication date of January 26, 2024) is a laser welding device for precision muffler production, including a fixed welding seat for precision muffler production. A fixed sleeve seat is fixedly installed at the center of the top of the fixed welding seat, and a rotating cylinder is rotatably installed inside the fixed sleeve seat. A first driving gear and a second driving gear are respectively sleeved on the outer surface of the rotating cylinder near both ends. At the same time, the rear bottom ends of the outer surfaces of the first driving gear and the second driving gear are meshed with a driving gear. A motor is fixedly installed at one end of the driving gear, and a motor seat is fixedly installed at the bottom of the motor. The overall device can realize automatic rotary laser welding at both ends of the precision muffler cylinder, which can not only greatly improve the production efficiency of the precision muffler, but also has high safety performance. There is also prior art two (a Chinese patent with publication number CN216656914U and publication date of June 3, 2022) which is a welding tooling for muffler assembly, including a bottom plate. A positioning device for positioning the muffler assembly is arranged on the bottom plate. A welding station is arranged on the bottom plate and on one side of the positioning device. The welding station includes two symmetrically arranged multi-degree-of-freedom welding devices. The multi-degree-of-freedom welding device includes a first support base. A rotatable first cross slide is arranged on the first support base. A second support base is slidably arranged on the first cross slide. A rotatable second cross slide is arranged on the second support base. The rotation direction of the second cross slide is perpendicular to the rotation direction of the first cross slide. A third support base is slidably arranged on the second cross slide. A laser welding gun is arranged on the third support base. A second rotating table is arranged on the third support. A second air clamp for positioning the rear exhaust pipe is arranged on the second rotating table. The welding positioning accuracy of the multi-degree-of-freedom welding device is high, and the clamping of the positioning device is convenient, improving the welding efficiency.

[0004] Although the welding devices in the prior art can position the items to be processed, most of them can only perform single positioning. When the items to be processed are in an irregular state, a single positioning mechanism cannot stably fix the items, and there is a certain instability in the positioning.

[0005] Therefore, we proposed a laser welding tool for automobile muffler production to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a laser welding tool for automobile muffler production, so as to solve the problem that most of the welding devices on the market can only perform single positioning on the object to be processed, and when the object to be processed is in an irregular state, the separate positioning mechanism cannot stably fix the object, and the positioning has a certain instability problem.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser welding tool for automobile muffler production, comprising a processing platform, a laser welding arm is arranged on the upper surface of the processing platform, and a placement plate for placing a workpiece is arranged at the center of the upper surface of the processing platform, and a fixing plate is fixedly connected to the lower surface of the processing platform, a clamping mechanism is arranged between the lower surface of the placement plate and the processing platform, and the clamping mechanism clamps the workpiece by rotating the rotating arm included therein, a suction cup is fixedly connected to the upper surface of the placement plate, and a negative pressure adsorption mechanism for adsorbing and fixing the workpiece is arranged between the lower surface of the placement plate and the clamping mechanism.

[0008] Preferably, the clamping mechanism includes a fixed shaft, which is rotatably connected to the lower surface of the processing platform, and a gear is fixedly connected to the outer side of the fixed shaft, a toothed plate is fixedly connected to the side of the placement disk, and the toothed plate is nested and connected to the processing platform, a zigzag rotating arm is fixedly connected to the center of the fixed shaft, and a clamping plate for clamping the workpiece is rotatably provided at the end of the rotating arm.

[0009] Preferably, the tooth plate and the gear are meshed with each other, and a buffer spring is fixedly connected between the lower surface of the tooth plate and the upper surface of the fixed plate, a torsion spring is fixedly connected between the side of the clamping plate and the rotating arm, and the fixed shaft forms a rotating structure through the gear and the processing platform.

[0010] Preferably, the negative pressure adsorption mechanism includes an air suction box, which is fixedly connected to the lower surface of the placement plate, a connecting groove which is connected to the air suction box is arranged at the center of the suction cup, and an air supply pipe is penetrated through the lower side of the air suction box, and an adjustment box is fixedly connected to the processing platform, and the other end of the air supply pipe is connected through the lower side of the adjustment box.

[0011] Preferably, the side of the processing platform is rotatably connected to an auxiliary shaft, and the lower end of the auxiliary shaft is fixedly connected to an inclined plate that is inclined, the interior of the adjusting box is nested with a movable plate, and the lower side of the movable plate is fixedly connected to a pull rod, and the pull rod is nested on the lower side of the adjusting box, the outer end of the pull rod is fixedly connected to a linkage plate, and the roller arranged on the upper end of the linkage plate fits with the inclined edge of the inclined plate.

[0012] Preferably, a traction rope is wound around the side of the fixed shaft, and the other end of the traction rope is wound around the auxiliary shaft, and the auxiliary shaft and the processing platform form a rotating structure through the traction rope, and the traction rope is made of high temperature resistant carbon fiber composite material.

[0013] Preferably, four groups of the regulating boxes are symmetrically arranged about the center point of the processing platform, and when the inclined plate contacts the linkage plate, the pull rod is driven to slide upward.

[0014] Preferably, an air jet pipe is provided through the upper end of the regulating box, and the spray hole of the air jet pipe is opened obliquely toward the placement plate.

[0015] Preferably, a fume treatment plate for absorbing and purifying welding fume is fixedly connected to the edge of the upper surface of the processing platform, and the fume treatment plate is connected to an external suction mechanism, a resistance block is fixedly connected to the upper side of the auxiliary shaft, and a contact button is fixedly connected to the inner side of the fume treatment plate, and the contact button corresponds to the position of the resistance block one by one.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the rotating arm in the clamping mechanism is driven to rotate by the weight of the workpiece itself, so that the workpiece is rotationally clamped by the clamping plate, and at the same time, when the workpiece is placed, the suction cup can initially adsorb the workpiece, so that the workpiece can be stably placed. During the clamping process, the clamping mechanism can be synchronously operated with the negative pressure adsorption mechanism, so that the pull rod drives the movable plate to move upward along the inside of the adjustment box, thereby extracting the gas inside the suction cup, thereby improving the adsorption force of the suction cup on the workpiece, and at the same time, by utilizing the upward movement of the movable plate in the negative pressure adsorption mechanism, the gas can also be discharged outward through the jet pipe to clean the workpiece, thereby improving the subsequent welding effect of the workpiece, and at the same time, when the negative pressure adsorption mechanism is running, the resistance block does not press the contact button, and the flue gas treatment plate is synchronously opened to absorb the flue gas:

[0017] (1) The workpiece to be processed is placed on the upper surface of the placement plate. The suction cup arranged on the upper surface of the placement plate can adsorb the workpiece, thereby preliminarily fixing the workpiece, which is convenient for the laser welding arm to perform subsequent welding processing.

[0018] (2) After the workpiece is placed on the upper surface of the placement plate, the gravity of the workpiece itself will drive the placement plate to move downward. At this time, the placement plate can synchronously drive the toothed plate limiter set on the side to move downward. Under the meshing action of the gear and the toothed plate, the gear can drive the rotating arm to rotate, thereby clamping the workpiece through the clamping plate, further improving the stability of the workpiece placed on the upper surface of the placement plate, avoiding the deviation of the workpiece during subsequent welding, and improving the welding efficiency.

[0019] (3) When the fixed shaft rotates, the auxiliary shaft can be rotated synchronously through the traction rope. At the same time, the traction rope is made of carbon fiber composite material. Due to its own high temperature resistance and low thermal expansion coefficient, the traction rope can be used in a high temperature welding environment. At this time, the linkage plate will move downward under the resistance of the inclined plate, so that the movable plate moves upward along the inside of the adjustment box. The upward movable plate evacuates the gas inside the suction cup through the connecting groove, so that the suction cup can negatively adsorb the placed workpiece, thereby increasing the suction force of the suction cup on the workpiece, further fixing the workpiece and improving the stability of workpiece processing.

[0020] (4) The movable plate is moved upward inside the regulating box, so that the gas is discharged outward through the air injection pipe, thereby blowing air to the workpiece placed on the placement plate, reducing the dust adhesion on the surface of the workpiece and avoiding the influence of dust on subsequent welding operations.

[0021] (5) After the auxiliary shaft rotates, the resistance block does not press the contact button, and the fume treatment plate connected to the external suction mechanism starts to operate. The fume generated during welding can be inhaled and purified through the fume treatment plate to prevent the fume from drifting and causing harm to the human body or air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the laser welding arm of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing plate of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the placement plate of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating arm of the present invention;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the fixed shaft of the present invention;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the inclined plate of the present invention;

[0029] Figure 8 It is a schematic diagram of a three-dimensional cross-sectional structure of the regulating box of the present invention;

[0030] Figure 9 It is a schematic diagram of the three-dimensional structure of the linkage plate of the present invention;

[0031] Figure 10 This is a schematic diagram of the three-dimensional structure of the contact button of the present invention;

[0032] Figure 11 It is a schematic diagram of the three-dimensional structure of the gear of the present invention.

[0033] In the figure: 1. Processing platform; 2. Laser welding arm; 3. Placement plate; 4. Smoke treatment plate; 5. Fixed plate; 6. Fixed shaft; 7. Gear; 8. Tooth plate; 9. Rotating arm; 10. Clamping plate; 11. Torsion spring; 12. Traction rope; 13. Auxiliary shaft; 14. Buffer spring; 15. Adjustment box; 16. Suction cup; 17. Suction box; 18. Connecting groove; 19. Inclined plate; 20. Linkage plate; 21. Pull rod; 22. Jet pipe; 23. Resistance block; 24. Contact button; 25. Movable plate; 26. Air supply pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: Figures 1 - 6For the technical solution shown, the present invention provides the following technical solution: A laser welding tooling for automobile muffler production, which discloses a clamping mechanism. Through the clamping mechanism, the workpiece can be limited and clamped to prevent the workpiece from shaking during subsequent welding operations and affecting the welding effect. On the upper surface of the processing platform 1, a laser welding arm 2 is provided. And at the center of the upper surface of the processing platform 1, a placement plate 3 for placing the workpiece is provided. And a fixed plate 5 is fixedly connected to the lower surface of the processing platform 1. A clamping mechanism is provided between the lower surface of the placement plate 3 and the processing platform 1. The clamping mechanism realizes the clamping of the workpiece through the rotation of the rotating arm 9 it includes. A suction cup 16 is fixedly connected to the upper surface of the placement plate 3. The clamping mechanism includes a fixed shaft 6. The fixed shaft 6 is rotatably connected to the lower surface of the processing platform 1. And a gear 7 is fixedly connected to the outside of the fixed shaft 6. A toothed plate 8 is fixedly connected to the side of the placement plate 3. And the toothed plate 8 is nested and connected to the processing platform 1. A tortuously arranged rotating arm 9 is fixedly connected to the center of the fixed shaft 6. And a clamping plate 10 for clamping the workpiece is rotatably arranged at the end of the rotating arm 9. The toothed plate 8 and the gear 7 are meshed with each other. And a buffer spring 14 is fixedly connected between the lower surface of the toothed plate 8 and the upper surface of the fixed plate 5. A torsion spring 11 is fixedly connected between the side of the clamping plate 10 and the rotating arm 9. The fixed shaft 6 forms a rotating structure with the processing platform 1 through the gear 7.

[0036] After the workpiece is placed on the upper surface of the placement plate 3, the self-gravity of the workpiece will drive the placement plate 3 to move downward. At this time, the placement plate 3 can synchronously drive the toothed plate 8 arranged on the side to move downward in a limited way along the processing platform 1. During the downward movement of the toothed plate 8, the buffer spring 14 can be compressed to cause its elastic deformation. Under the buffering of the buffer spring 14, the stability of the movement of the toothed plate 8 can be improved. At this time, under the meshing action of the gear 7 and the toothed plate 8, the rotating arm 9 can be driven to rotate through the fixed shaft 6, so that the rotating arm 9 drives the clamping plate 10 arranged at the end to clamp the workpiece, further improving the stability of the workpiece placed on the upper surface of the placement plate 3, preventing the workpiece from shifting during subsequent welding, and improving the welding efficiency.

[0037] Embodiment 2: As Figure 5 、 Figures 7 - 9 and Figure 11For the technical solution shown, the present invention provides the following technical solution: a laser welding tooling for automobile muffler production, which discloses a negative pressure adsorption mechanism. Through the negative pressure adsorption mechanism, the suction cup 16 can further perform negative pressure adsorption on the workpiece, improving the stability of the workpiece placement. There is a negative pressure adsorption mechanism for adsorbing and fixing the workpiece between the lower surface of the placement plate 3 and the clamping mechanism. The negative pressure adsorption mechanism includes an air suction box 17, which is fixedly connected to the lower surface of the placement plate 3. A communication groove 18 communicating with the air suction box 17 is provided at the center of the suction cup 16. And an air supply pipe 26 is penetrated and arranged at the lower side of the air suction box 17. An adjustment box 15 is fixedly connected to the processing platform 1. The other end of the air supply pipe 26 is penetrated and connected to the lower side of the adjustment box 15. An auxiliary shaft 13 is rotatably connected to the side of the processing platform 1. And an inclined plate 19 which is inclined is fixedly connected to the lower end of the auxiliary shaft 13. An activity plate 25 is nested and connected inside the adjustment box 15. And a pull rod 21 is fixedly connected to the lower side of the activity plate 25. And the pull rod 21 is nested and arranged at the lower side of the adjustment box 15. A linkage plate 20 is fixedly connected to the outer end of the pull rod 21. The roller provided at the upper end of the linkage plate 20 is in contact with the inclined edge of the inclined plate 19. A traction rope 12 is wound around the side of the fixed shaft 6. And the other end of the traction rope 12 is wound around the auxiliary shaft 13. And the auxiliary shaft 13 forms a rotating structure with the processing platform 1 through the traction rope 12. At the same time, the traction rope 12 is made of a heat-resistant carbon fiber composite material. Four groups of adjustment boxes 15 are symmetrically arranged about the center point of the processing platform 1. When the inclined plate 19 abuts against the linkage plate 20, it drives the pull rod 21 to slide upward.

[0038] The workpiece to be processed is placed on the upper surface of the placement plate 3. The suction cup 16 arranged on the upper surface of the placement plate 3 can adsorb the workpiece, thereby preliminarily fixing the workpiece, which is convenient for the laser welding arm 2 to perform subsequent welding processing. During the rotation of the fixed shaft 6, the traction rope 12 will be synchronously wound. At the same time, the traction rope 12 is made of carbon fiber composite material. The traction rope 12 can be used in a high-temperature welding environment due to its own high temperature resistance and low thermal expansion coefficient. The traction rope 12 is entirely below the processing platform 1, and the processing platform 1 can shield the traction rope 12, further avoiding the influence of the laser beam on the traction rope 12 during subsequent processing operations. Under the action of traction, the traction rope 12 can synchronously rotate the auxiliary shaft 13. When the auxiliary shaft 13 is rotating, it will synchronously drive the traction rope below it. The inclined plate 19 is rotated and contacts the roller provided at the end of the linkage plate 20. At this time, the linkage plate 20 will move downward under the contact of the inclined plate 19, and the pull rod 21 drives the movable plate 25 to move upward along the inside of the adjusting box 15. At this time, the upward movable plate 25 will evacuate the lower side of the adjusting box 15. At the same time, with the auxiliary action of the air supply pipe 26, the upward movable plate 25 will extract the internal gas through the connecting groove 18 opened inside the suction cup 16, so that the suction cup 16 can perform negative pressure adsorption on the placed workpiece, thereby improving the adsorption force of the suction cup 16 on the workpiece, further fixing the workpiece and improving the stability of workpiece processing. After the workpiece is fixed on the placement plate 3, the laser welding operation acts on the position of the placement plate 3, thereby further avoiding the influence of the laser welding beam on the traction rope 12.

[0039] Embodiment 3: Figure 2 , Figure 3 , Figure 5 and Figure 10 The technical scheme shown in the figure, the present invention provides the following technical scheme: a laser welding tool for automobile muffler production, discloses a jet pipe 22, and the jet pipe 22 can realize the cleaning of the workpiece through the movement of the movable plate 25: the upper end of the adjustment box 15 is penetrated by the jet pipe 22, and the spray hole of the jet pipe 22 is inclined to the placement plate 3, the upper surface side of the processing platform 1 is fixedly connected with a fume treatment plate 4 for absorbing and purifying welding fume, and the fume treatment plate 4 is connected to the external suction mechanism, the upper side of the auxiliary shaft 13 is fixedly connected with a resistance block 23, and the inner side of the fume treatment plate 4 is fixedly connected with a contact button 24, and the contact button 24 corresponds to the resistance block 23 in position.

[0040] When the movable plate 25 moves upward inside the adjustment box 15, the movable plate 25 will extrude the gas on the upper side inside the adjustment box 15. At this time, the gas is discharged outward through the air jet pipe 22, thereby blowing air on the workpiece placed on the placement plate 3, reducing the dust adhesion on the surface of the workpiece, avoiding the influence of dust on subsequent welding operations. When the auxiliary shaft 13 rotates under the traction of the traction rope 12, it will synchronously drive the contact block 23 to rotate. At this time, the contact block 23 does not press the contact button 24. At this time, the contact button 24 is sensed, and the flue gas treatment plate 4 connected to the external suction mechanism is started. Through the flue gas treatment plate 4, the flue gas generated during welding can be inhaled and purified, avoiding the harm of flue gas dispersion to the human body or air quality.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser welding tooling for automobile muffler production, including a processing platform (1), on the upper surface of the processing platform (1) there is a laser welding arm (2), and at the center of the upper surface of the processing platform (1) there is a placement plate (3) for placing workpieces, and a fixing plate (5) is fixedly connected to the lower surface of the processing platform (1), characterized in that, A clamping mechanism is provided between the lower surface of the placement plate (3) and the processing platform (1). The clamping mechanism realizes the clamping of the workpiece through the rotation of the rotating arm (9) it includes. A suction cup (16) is fixedly connected to the upper surface of the placement plate (3), and a negative pressure adsorption mechanism for adsorbing and fixing the workpiece is provided between the lower surface of the placement plate (3) and the clamping mechanism.

2. The laser welding tooling for automobile muffler production according to claim 1, characterized in that: The clamping mechanism includes a fixed shaft (6). The fixed shaft (6) is rotatably connected to the lower surface of the processing platform (1), and a gear (7) is fixedly connected to the outside of the fixed shaft (6). A toothed plate (8) is fixedly connected to the side of the placement plate (3), and the toothed plate (8) is nested on the processing platform (1). A zigzag rotating arm (9) is fixedly connected to the center of the fixed shaft (6), and a clamping plate (10) for clamping the workpiece is rotatably provided at the end of the rotating arm (9).

3. The laser welding tooling for automobile muffler production according to claim 2, characterized in that: The toothed plate (8) and the gear (7) are meshed with each other, and a buffer spring (14) is fixedly connected between the lower surface of the toothed plate (8) and the upper surface of the fixed plate (5). A torsion spring (11) is fixedly connected between the side of the clamping plate (10) and the rotating arm (9). The fixed shaft (6) forms a rotating structure with the processing platform (1) through the gear (7).

4. A laser welding tooling for automobile muffler production according to claim 2, characterized in that: The negative pressure adsorption mechanism includes an air suction box (17). The air suction box (17) is fixedly connected to the lower surface of the placement plate (3). A communication groove (18) is provided at the center of the suction cup (16) and communicates with the air suction box (17). An air supply pipe (26) is provided through the lower side of the air suction box (17). An adjustment box (15) is fixedly connected to the processing platform (1), and the other end of the air supply pipe (26) is connected through the lower side of the adjustment box (15).

5. A laser welding tooling for automobile muffler production according to claim 4, characterized in that: An auxiliary shaft (13) is rotatably connected to the side of the processing platform (1), and an inclined plate (19) is fixedly connected to the lower end of the auxiliary shaft (13) and is inclined. An activity plate (25) is nested inside the adjustment box (15), and a pull rod (21) is fixedly connected to the lower side of the activity plate (25). The pull rod (21) is nested on the lower side of the adjustment box (15). A linkage plate (20) is fixedly connected to the outer end of the pull rod (21). A roller provided at the upper end of the linkage plate (20) is in contact with the inclined edge of the inclined plate (19).

6. The laser welding tooling for producing an automotive muffler according to claim 5, wherein: A pulling rope (12) is wound around the side of the fixed shaft (6), and the other end of the pulling rope (12) is wound around the auxiliary shaft (13). The auxiliary shaft (13) forms a rotating structure with the processing platform (1) through the pulling rope (12). At the same time, the pulling rope (12) is made of a high-temperature-resistant carbon fiber composite material.

7. A laser welding tooling for automobile muffler production according to claim 5, characterized in that: Four groups of adjustment boxes (15) are symmetrically arranged about the center point of the processing platform (1). When the inclined plate (19) abuts against the linkage plate (20), the pull rod (21) is driven to slide upward.

8. A laser welding tooling for automobile muffler production according to claim 5, characterized in that: A jet pipe (22) is provided through the upper end of the adjustment box (15), and the jet holes of the jet pipe (22) are inclinedly opened towards the placement plate (3).

9. The laser welding tooling for automobile muffler production according to claim 5, characterized in that: A fume treatment plate (4) for absorbing and purifying welding fume is fixedly connected to the side of the upper surface of the processing platform (1), and the fume treatment plate (4) is connected to an external suction mechanism. A resistance block (23) is fixedly connected to the upper side of the auxiliary shaft (13), and a contact button (24) is fixedly connected to the inner side of the fume treatment plate (4), and the contact button (24) corresponds to the resistance block (23) in position one by one.

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