Laser welding fixture for sandwich panels

Abstract

The application discloses a kind of sandwich plate laser welding clamps, it is related to laser welding equipment technical field, including support table, the support table top is fixedly installed with frame, the frame top is fixedly installed with motor, the support table top is rotatably installed with rotary table, the rotary table top is slidably installed with fixed block, the support table top is slidably installed with welding head, the output end of the motor is fixedly installed with electric push rod, the electric push rod bottom is fixedly installed with pressing plate, the pressing plate bottom is slidably installed with fixed block, the support table top is also provided with protection device, when pressing plate presses to a certain degree, outer rod can be contacted with support table and support pressing plate, avoid pressing plate excessive pressing plate piece, excessive pressing plate piece can cause sandwich plate local excessive mechanical stress, especially around welding area, these stresses can cause local deformation of plate, affect the quality of welded joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding equipment, in particular to a kind of sandwich plate laser welding fixture. BACKGROUND

[0002] Sandwich structure, especially the metal sandwich panel made by laser welding, has high specific strength, good impact resistance, corrosion resistance, heat insulation, sound insulation and radiation resistance, and other excellent performance, so it has been widely used in practice.

[0003] The patent with patent announcement No.CN206140043U relates to the technical field of sandwich plate laser welding fixture, including rack, base, pressing plate and pneumatic cylinder, the rack is provided with two parallel guide rails, the base bottom surface is provided with matching roller with the guide rail, the base is slidably arranged on the rack, the pressing plate is arranged above the base, the to-be-welded part is placed between the pressing plate and the base, the pneumatic cylinder is arranged on the side wall of the base, wherein the output end of the pneumatic cylinder penetrates from the lower part of the side wall of the base upwardly. The patent relates to the technical field of laser welding, and provides a kind of sandwich plate laser welding fixture, which is convenient to operate, so that the gap between the sandwich structure of the welded part meets the process requirements of laser welding, the pressing and welding quality is good, and it is suitable for thinner sandwich plate laser welding fixture.

[0004] The above-mentioned patent has the advantages of convenient operation, so that the gap between the sandwich structure of the welded part meets the process requirements of laser welding, the pressing and welding quality is good, and it is suitable for thinner sandwich plate laser welding fixture, but the two plate parts may be excessively pressed during pressing, and the excessive clamping of the clamp may cause the contact area between the plates to be too large, thereby affecting the uniform conduction of heat and causing uneven heat distribution in the welding area. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a kind of sandwich plate laser welding fixture, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present application is realized by the following technical scheme: a kind of sandwich plate laser welding fixture, including support table, the support table top is fixedly installed with frame, the frame top is fixedly installed with motor, the support table top is rotatably installed with rotary table, the rotary table top is slidably installed with fixed block, the support table top is slidably installed with welding head, the output end of the motor is fixedly installed with electric push rod, the electric push rod bottom is fixedly installed with pressing plate, the pressing plate bottom is slidably installed with fixed block, the support table top is further provided with protection device;

[0007] The protection device comprises an inner rod, an outer rod, a sliding block, a push plate and an inclined block, the outer rod is rotationally installed on the inner wall of the pressing plate, the inner rod is slidingly installed on the inner wall of the outer rod, the sliding block is slidingly installed on the bottom of the pressing plate, a square groove is formed in the outer wall of the outer rod, the push plate is fixedly installed on one side of the inner rod close to the square groove, the push plate is in contact with the inner wall of the square groove, and the inclined block is fixedly installed on one side of the push plate close to the sliding block.

[0008] According to the above technical scheme, the protection device further comprises a rotating plate, a limiting block and a fixed plate, the rotating plate is rotationally installed on the top of the rotating table, the limiting block is slidingly installed on the inner wall of the rotating table, the fixed plate is fixedly installed on the top of the supporting table, a limiting groove is formed in one side of the fixed plate close to the limiting block, the limiting block is in contact with the inner wall of the limiting groove, and only when the inner rod is completely retracted can the outer rod rotate to contact and support the supporting table, thereby avoiding incomplete compression of the plate piece by the pressing plate, and the plate piece may be offset during welding, which may cause inaccurate welding position and affect the position and quality of the welded joint.

[0009] According to the above technical scheme, a first spring is arranged between the inner rod and the outer rod, the first spring is arranged to drive the inner rod to return to the original position, a second spring is arranged between the limiting block and the rotating table, the second spring is arranged to drive the limiting block to return to the original position, a third spring is arranged between the sliding block and the pressing plate, the third spring is arranged to drive the sliding block to return to the original position, and a fourth spring is arranged between the welded joint supporting tables, the fourth spring is arranged to drive the welded joint to return to the original position.

[0010] According to the above technical scheme, a first torsional spring is arranged between the rotating plate and the rotating table, the first torsional spring is arranged to drive the rotating plate to return to the original position, a second torsional spring is arranged between the outer rod and the pressing plate, the second torsional spring is arranged to drive the outer rod to return to the original position, one side of the sliding block close to the push plate is provided with an inclined surface, the inclined surface is arranged to facilitate the push plate to push and move the sliding block, and one side of the limiting block close to the outer rod is provided with an inclined surface, the inclined surface is arranged to facilitate the outer rod to push and move the limiting block.

[0011] According to the above technical scheme, the support table top is further provided with a pushing device for pushing the welding head to move to make the welding more uniform and a scraping device for avoiding oil wiping after welding, the pushing device comprises a pushing plate, a pulling plate, a first hydraulic rod, a first hydraulic cylinder, a second hydraulic cylinder, a second hydraulic rod, a baffle, a bottom plate, a pushing block, a sliding plate and a square plate, the first hydraulic cylinder is fixedly installed on the top of the pressing plate, the first hydraulic rod is slidingly installed on the inner wall of the first hydraulic cylinder, the pulling plate is fixedly installed on the end of the first hydraulic rod away from the first hydraulic cylinder, the pushing plate is fixedly installed on the side of the outer rod close to the pulling plate, the second hydraulic cylinder is fixedly installed on the top of the support table, the second hydraulic rod is slidingly installed on the inner wall of the second hydraulic cylinder, the bottom plate is slidingly installed on the top of the support table, the baffle is slidingly installed on the inner wall of the bottom plate, the pushing block is fixedly installed on the side of the baffle away from the welding head, the sliding plate is slidingly installed on the top of the support table, and the square plate is slidingly installed on the circumferential surface of the rotating shaft of the rotating table, the movement of the second hydraulic rod will release the support of the baffle, then the baffle will be pulled by the fifth spring to move towards the inside of the bottom plate, the movement of the baffle towards the inside of the bottom plate will release the blockage of the welding head, then the welding head can weld the plate, avoiding welding the plate when the pressing plate does not press the plate tightly, so that the plate may be displaced or rotated during the welding process, resulting in inaccurate welding position, which will affect the position and quality of the welded joint, possibly causing uneven or misaligned joints, and even causing the welding to fail.

[0012] According to the above technical scheme, the first hydraulic cylinder and the second hydraulic cylinder are communicated through a hose, the baffle and the bottom plate are provided with a fifth spring, the fifth spring is provided to drive the baffle to slide towards the inside of the bottom plate, the pulling plate and the pressing plate are provided with a sixth spring, the sixth spring is provided to drive the pulling plate to return to the original position, the sliding plate and the support table are provided with a seventh spring, the seventh spring is provided to drive the sliding plate to return to the original position, the baffle is in contact with the second hydraulic rod, and the bottom plate is in contact with the welding head.

[0013] According to the technical scheme, the scraping device comprises a connecting rod, a rack, a first gear, a second gear, a vertical plate, an oil tank, a rotating push rod, a sleeve rod and a scraper, the vertical plate is slidingly installed on the top of the support table, the connecting rod is fixedly installed on one side of the bottom plate close to the vertical plate, the rack is fixedly installed on one side of the connecting rod close to the vertical plate, the first gear is rotatably installed on the top of the support table, the second gear is rotatably installed on one side of the vertical plate close to the first gear, the oil tank is fixedly installed on one side of the vertical plate close to the first gear, the rotating push rod is rotatably installed on one side of the vertical plate away from the first gear, the sleeve rod is slidingly installed on the circumferential surface of the rotating push rod, and the scraper is rotatably installed on one side of the sleeve rod away from the vertical plate.

[0014] According to the technical scheme, the oil tank and the sleeve rod are communicated through the telescopic pipe, a first one-way valve is arranged at the position where the sleeve rod is communicated with the telescopic pipe, the first one-way valve is arranged to enable the liquid to flow into the sleeve rod in one direction, the scraper is communicated with the sleeve rod, a second one-way valve is arranged at the position where the scraper is communicated with the sleeve rod, the second one-way valve is arranged to enable the liquid to flow out through the scraper in one direction, the scraper is provided with an oil outlet on the side close to the plate, the rotating shaft of the second gear is connected with the rotating push rod through a belt, and eight springs are arranged between the sleeve rod and the rotating push rod, and the eight springs are arranged to drive the sleeve rod to return to the original position.

[0015] The present application provides a kind of sandwich plate laser welding fixture.It has the following beneficial effects:

[0016] (1) When the pressing plate presses the plate, the inner rod will contact the support table, and the inner rod will slide towards the inside of the outer rod due to the pressure of the pressing plate. When the pressing plate is pressed to a certain extent, the outer rod will contact the support table to support the pressing plate, preventing the pressing plate from pressing the plate too much. Over-tightening the plate may cause excessive mechanical stress on the sandwich plate, especially around the welding area. These stresses may cause local deformation of the plate, affecting the quality of the welded joint. When the electric push rod stops pressing, rotate the outer rod to make it contact the support table. The outer rod will be in contact with the slider, and the slider will be pushed back to its original position by the third spring. The outer rod will be blocked by the slider, preventing the slider from rotating back to its original position. Only when the inner rod is fully retracted can the outer rod rotate to contact the support table for support. This prevents the pressing plate from not being fully tightened against the plate, which may cause the plate to shift during welding. The shift of the plate may result in inaccurate welding position, which may affect the position and quality of the welded joint.

[0017] (2) The invention, the second hydraulic rod moves to remove the support of the baffle, then the baffle will be pulled by the No. 5 spring to move towards the inside of the bottom plate, the baffle moves towards the inside of the bottom plate to remove the block of the welding head, then the welding head can weld the plate, avoid the plate under the condition of not being pressed tightly completely, so that the plate may be displaced or rotated during welding, resulting in inaccurate welding position, which will affect the position and quality of the welded joint, may cause uneven or misaligned joints, even lead to welding failure.

[0018] (3) The invention, the square plate rotates to push the sliding plate to move along the boundary of the square plate, the sliding plate moves to push the push block to move, the push block moves to push the bottom plate to move, the bottom plate moves to push the welding head to move, then the welding head moves to make the welding head and the plate distance consistent, avoid the welding head without rotating with the plate during welding, the irradiation angle and position of the laser will change, which may cause uneven or incomplete welding.

[0019] (4) The invention, the second gear rotates to drive the rotating push rod to rotate through the belt, the rotating push rod rotates to drive the sleeve rod to rotate, the sleeve rod rotates to drive the scraper to rotate, the scraper rotates to scrape off the welding slag on the surface after welding, scraping off the welding slag can remove surface impurities, improve the appearance of the welded joint, make the weld more flat and smooth, which helps subsequent coating treatment, inspection and assembly, and improves the overall appearance quality of the welded part.

[0020] (5) The invention, when the motor drives the plate to rotate, the sleeve rod will push the sleeve rod to slide towards the vertical plate due to the shape of the plate, then the rotating push rod will extrude the oil inside the sleeve rod to be discharged through the oil outlet on the surface of the scraper, which can scrape and wipe the surface of the plate after welding, prevent the plate surface from oxidizing, accelerate the cooling speed of the plate, improve the corrosion resistance and durability of the plate, and the oil can play a role in preventing rust, avoiding direct contact of the metal surface with moisture in the air. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall structure of the invention is shown in the figure;

[0022] Figure 2 The position structure of the electric push rod and the pressing plate of the invention is shown in the figure;

[0023] Figure 3 The position structure of the rotating plate and the limiting block of the invention is shown in the figure;

[0024] Figure 4 The position structure of the No. 1 hydraulic cylinder and the No. 1 hydraulic rod of the invention is shown in the figure;

[0025] Figure 5 The position structure of the No. 1 hydraulic cylinder and the No. 1 hydraulic rod of the invention is shown in the figure; Figure 4 The enlarged structure of part A of the invention is shown in the figure;

[0026] Figure 6 It is a schematic diagram of the position structure of the second hydraulic cylinder and the second hydraulic rod of the application.

[0027] Figure 7 It is a schematic diagram of the position structure of the first gear and the second gear of the application.

[0028] Figure 8 It is a schematic diagram of the position structure of the sleeve rod and the rotating push plate of the application.

[0029] In the figure: 1, support table; 2, frame; 3, motor; 4, rotary table; 5, welding head; 6, fixed block; 7, pressing plate; 8, electric push rod; 9, inner rod; 10, outer rod; 11, rotating plate; 12, limiting block; 13, fixed plate; 14, sliding block; 15, push plate; 16, inclined block; 20, push plate; 21, pull plate; 22, first hydraulic rod; 23, first hydraulic cylinder; 24, second hydraulic cylinder; 25, second hydraulic rod; 26, baffle; 27, bottom plate; 28, push block; 29, sliding plate; 291, square plate; 30, connecting rod; 31, rack; 32, first gear; 33, second gear; 34, vertical plate; 35, oil tank; 36, rotating push rod; 37, sleeve rod; 38, scraper. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0031] Please refer to Figures 1-8 An embodiment of the application is a sandwich plate laser welding clamp, which comprises a support table 1, a frame 2 is fixedly installed on the top of the support table 1, a motor 3 is fixedly installed on the top of the frame 2, a rotary table 4 is rotatably installed on the top of the support table 1, a fixed block 6 is slidably installed on the top of the rotary table 4, a welding head 5 is slidably installed on the top of the support table 1, an electric push rod 8 is fixedly installed on the output end of the motor 3, a pressing plate 7 is fixedly installed on the bottom of the electric push rod 8, the fixed block 6 is slidably installed on the bottom of the pressing plate 7, and a protection device is further arranged on the top of the support table 1.

[0032] The protection device comprises an inner rod 9, an outer rod 10, a sliding block 14, a push plate 15 and an inclined block 16, the outer rod 10 is rotationally installed on the inner wall of the pressing plate 7, the inner rod 9 is slidingly installed on the inner wall of the outer rod 10, the sliding block 14 is slidingly installed on the bottom of the pressing plate 7, a square groove is formed on the outer wall of the outer rod 10, the push plate 15 is fixedly installed on one side of the inner rod 9 close to the square groove, the push plate 15 is in contact with the inner wall of the square groove, and the inclined block 16 is fixedly installed on one side of the push plate 15 close to the sliding block 14; when the pressing plate 7 is pressed to a certain degree, the outer rod 10 is in contact with the support table 1 to support the pressing plate 7, so that the pressing plate 7 is prevented from being excessively pressed, and excessive pressing of the plate piece can cause excessive mechanical stress on the local sandwich plate, especially around the welding area, and the stress can cause local deformation of the plate, thereby affecting the quality of the welded joint.

[0033] The protection device further comprises a rotating plate 11, a limiting block 12 and a fixed plate 13, the rotating plate 11 is rotationally installed on the top of the rotating table 4, the limiting block 12 is slidingly installed on the inner wall of the rotating table 4, the fixed plate 13 is fixedly installed on the top of the support table 1, a limiting groove is formed on one side of the fixed plate 13 close to the limiting block 12, the limiting block 12 is in contact with the inner wall of the limiting groove, and only when the inner rod 9 is completely retracted into the outer rod 10, the outer rod 10 can be rotated to contact and support the support table 1, so that the pressing plate 7 is prevented from not being completely pressed against the plate piece, and the plate piece can be offset during welding, and the offset of the plate piece can cause inaccurate welding position, which affects the position and quality of the welded joint.

[0034] A first spring is arranged between the inner rod 9 and the outer rod 10, the first spring is arranged to drive the inner rod 9 to return to the original position, a second spring is arranged between the limiting block 12 and the rotating table 4, the second spring is arranged to drive the limiting block 12 to return to the original position, a third spring is arranged between the sliding block 14 and the pressing plate 7, the third spring is arranged to drive the sliding block 14 to return to the original position, and a fourth spring is arranged between the support table 1 and the welding head 5, the fourth spring is arranged to drive the welding head 5 to return to the original position.

[0035] A first torsional spring is arranged between the rotating plate 11 and the rotating table 4, the first torsional spring is arranged to drive the rotating plate 11 to return to the original position, a second torsional spring is arranged between the outer rod 10 and the pressing plate 7, the second torsional spring is arranged to drive the outer rod 10 to return to the original position, one side of the sliding block 14 close to the push plate 15 is provided with an inclined surface, the inclined surface is arranged to facilitate the push plate 15 to push and move the sliding block 14, and one side of the limiting block 12 close to the outer rod 10 is provided with an inclined surface, the inclined surface is arranged to facilitate the outer rod 10 to push and move the limiting block 12.

[0036] When the two plate pieces need to be welded together, first, the two plate pieces are stacked and placed above the turntable 4, then the electric push rod 8 is started to push the pressing plate 7 to move downward to press the plate pieces, so that the plate pieces are attached together, then the fixed block 6 moves to fix the plate pieces to avoid deviation of the plate pieces during welding, after the fixing is completed, the motor 3 is started to drive the electric push rod 8 to rotate, the rotation of the electric push rod 8 drives the pressing plate 7 to rotate, and the plate pieces also rotate, and the welding head 5 welds the boundary of the two plate pieces, when the pressing plate 7 is pressed, the outer rod 10 moves, the outer rod 10 moves to drive the inner rod 9 to move, the inner rod 9 moves to contact the inclined surface of the limiting block 12, then the inner rod 9 pushes the limiting block 12 to slide away from the fixed plate 13, then the limiting block 12 is separated from the fixed plate 13, and the limiting of the turntable 4 is released, at this time the motor 3 can drive the plate pieces to rotate, when the pressing plate 7 presses the plate pieces, the inner rod 9 contacts the support table 1, the inner rod 9 slides to the inside of the outer rod 10 due to the pressure of the pressing plate 7, when the pressing plate 7 is pressed to a certain extent, the outer rod 10 contacts the support table 1 to support the pressing plate 7, avoiding excessive pressing of the plate pieces, which may cause excessive mechanical stress on the local plate pieces, especially around the welding area, these stresses may cause local deformation of the plate, affecting the quality of the welded joint, when the inner rod 9 moves to the inside of the outer rod 10, the push plate 15 moves, the push plate 15 moves to drive the inclined block 16 to move, the inclined block 16 moves to contact the inclined surface of the sliding block 14, then the inclined block 16 pushes the sliding block 14 to move to release the limit of the rotation of the outer rod 10, when the electric push rod 8 stops pressing, the outer rod 10 is rotated to separate the contact with the support table 1, the rotation of the outer rod 10 separates the contact with the sliding block 14, then the sliding block 14 is pushed back to the original position by the third spring, then the outer rod 10 is blocked by the sliding block 14, so that the sliding block 14 cannot rotate back to the original position, avoiding the blockage of the outer rod 10 to the plate pieces during welding, so that the welding is not complete.

[0037] Please refer to Figures 1-8On the basis of the above embodiment, in another embodiment of the present application, the top of the support table 1 is further provided with a pushing device for pushing the welding head 5 to move to make the welding more uniform and a scraping device for avoiding oiling after welding, the pushing device comprising a pushing plate 20, a pulling plate 21, a first hydraulic rod 22, a first hydraulic cylinder 23, a second hydraulic cylinder 24, a second hydraulic rod 25, a baffle plate 26, a bottom plate 27, a pushing block 28, a sliding plate 29 and a square plate 291, the first hydraulic cylinder 23 being fixedly installed on the top of the pressing plate 7, the first hydraulic rod 22 being slidingly installed on the inner wall of the first hydraulic cylinder 23, the pulling plate 21 being fixedly installed on the end of the first hydraulic rod 22 away from the first hydraulic cylinder 23, the pushing plate 20 being fixedly installed on the side of the outer rod 10 close to the pulling plate 21, the second hydraulic cylinder 24 being fixedly installed on the top of the support table 1, the second hydraulic rod 25 being slidingly installed on the inner wall of the second hydraulic cylinder 24, the bottom plate 27 being slidingly installed on the top of the support table 1, the baffle plate 26 being slidingly installed on the inner wall of the bottom plate 27, the pushing block 28 being fixedly installed on the side of the baffle plate 26 away from the welding head 5, the sliding plate 29 being slidingly installed on the top of the support table 1, and the square plate 291 being slidingly installed on the circumferential surface of the rotating shaft of the rotating table 4, the movement of the second hydraulic rod 25 will remove the support of the baffle plate 26, then the baffle plate 26 will be pulled by the fifth spring to move towards the inside of the bottom plate 27, the movement of the baffle plate 26 towards the inside of the bottom plate 27 will remove the blockage of the welding head 5, then the welding head 5 can weld the plate, avoiding the situation that the pressing plate 7 does not press the plate tightly before welding, so that the plate may be displaced or rotated during welding, resulting in inaccurate welding position, which will affect the position and quality of the welded joint, possibly causing uneven or misaligned joints, and even leading to failure of welding.

[0038] The first hydraulic cylinder 23 and the second hydraulic cylinder 24 are communicated through a hose, the baffle plate 26 and the bottom plate 27 are provided with a fifth spring, the fifth spring is provided to drive the baffle plate 26 to slide towards the inside of the bottom plate 27, the pulling plate 21 and the pressing plate 7 are provided with a sixth spring, the sixth spring is provided to drive the pulling plate 21 to return to the original position, the sliding plate 29 and the support table 1 are provided with a seventh spring, the seventh spring is provided to drive the sliding plate 29 to return to the original position, the baffle plate 26 is in contact with the second hydraulic rod 25, and the bottom plate 27 is in contact with the welding head 5.

[0039] The scraping device comprises a connecting rod 30, a rack 31, a first gear 32, a second gear 33, a vertical plate 34, an oil tank 35, a rotating push rod 36, a sleeve rod 37 and a scraper 38. The vertical plate 34 is slidingly installed on the top of the support table 1. The connecting rod 30 is fixedly installed on the bottom plate 27 near one side of the vertical plate 34. The rack 31 is fixedly installed on the connecting rod 30 near one side of the vertical plate 34. The first gear 32 is rotatably installed on the top of the support table 1. The second gear 33 is rotatably installed on the vertical plate 34 near one side of the first gear 32. The oil tank 35 is fixedly installed on the vertical plate 34 near one side of the first gear 32. The rotating push rod 36 is rotatably installed on the vertical plate 34 away from one side of the first gear 32. The sleeve rod 37 is slidingly installed on the circumferential surface of the rotating push rod 36. The scraper 38 is rotatably installed on the sleeve rod 37 away from one side of the vertical plate 34. When the motor 3 drives the plate to rotate, the sleeve rod 37 will be pushed to slide towards the vertical plate 34 due to the shape of the plate, so that the rotating push rod 36 will squeeze the oil in the sleeve rod 37 to flow out through the oil outlet on the surface of the scraper, thereby scraping the surface of the plate after welding, preventing the surface of the plate from oxidizing, accelerating the cooling speed of the plate, improving the corrosion resistance and durability of the plate, and preventing rust by applying oil to the metal surface to avoid direct contact with moisture in the air.

[0040] The oil tank 35 is in communication with the sleeve rod 37 through an extension tube. A first one-way valve is arranged at the position where the sleeve rod 37 communicates with the extension tube, so as to enable the liquid to flow into the sleeve rod 37 in one direction. The scraper 38 communicates with the sleeve rod 37. A second one-way valve is arranged at the position where the scraper 38 communicates with the sleeve rod 37, so as to enable the liquid to flow out through the scraper 38 in one direction. An oil outlet is arranged on the side of the scraper 38 near the plate. The rotating shaft of the second gear 33 is in transmission connection with the rotating push rod 36 through a belt. An eighth spring is arranged between the sleeve rod 37 and the rotating push rod 36, so as to drive the sleeve rod 37 to return to the original position.

[0041] When the outer rod 10 rotates, it will drive the push plate 20 to move, the push plate 20 will drive the pull plate 21 to move, the pull plate 21 will pull the first hydraulic rod 22 to move away from the first hydraulic cylinder 23, the first hydraulic rod 22 will suck the liquid in the second hydraulic cylinder 24 into the first hydraulic cylinder 23, so the liquid in the second hydraulic cylinder 24 will decrease, and the second hydraulic rod 25 will slide back to the inside of the second hydraulic cylinder 24, the second hydraulic rod 25 will remove the support of the baffle 26, and the baffle 26 will be pulled by the fifth spring to move to the inside of the bottom plate 27, the baffle 26 will remove the blockage of the welding head 5, and the welding head 5 can weld the plate, when the baffle 26 moves, the push block 28 will move, the push block 28 will contact the sliding plate 29, when the motor 3 drives the rotating table 4 to rotate, the rotating table 4 will drive the square plate 291 to rotate, the square plate 291 will push the sliding plate 29 to move along the boundary of the square plate 291, the sliding plate 29 will push the push block 28 to move, the push block 28 will push the bottom plate 27 to move, the bottom plate 27 will push the welding head 5 to move, and the welding head 5 can make the distance between the welding head 5 and the plate consistent, so that the welding head 5 does not rotate with the plate during welding, the irradiation angle and position of the laser will change, which may cause uneven weld or incomplete welding.

[0042] When the bottom plate 27 moves, it will drive the connecting rod 30 to move, the connecting rod 30 will drive the rack 31 to move, the rack 31 will drive the first gear 32 meshing with the rack 31 to rotate, the first gear 32 will drive the second gear 33 to rotate, the second gear 33 will drive the rotating push rod 36 to rotate through the belt, the rotating push rod 36 will drive the sleeve rod 37 to rotate, the sleeve rod 37 will drive the scraper 38 to rotate, the scraper 38 will scrape off the welding slag on the surface after welding, when the motor 3 drives the plate to rotate, the sleeve rod 37 will slide to the direction of the vertical plate 34 due to the shape of the plate, the rotating push rod 36 will squeeze the oil in the sleeve rod 37 to be discharged through the oil outlet on the surface of the scraper 38, so as to scrape the surface of the plate after welding, prevent the plate surface from oxidizing and accelerate the cooling speed of the plate, when the sleeve rod 37 returns to the original position, it will suck the oil in the oil tank 35 into the sleeve rod 37, so that the sleeve rod 37 has stored oil for next use.

[0043] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A laser welding fixture for sandwich panels, comprising a support platform (1), characterized in that: A frame (2) is fixedly installed on the top of the support platform (1), a motor (3) is fixedly installed on the top of the frame (2), a turntable (4) is rotatably installed on the top of the support platform (1), a fixing block (6) is slidably installed on the top of the turntable (4), a welding head (5) is slidably installed on the top of the support platform (1), an electric push rod (8) is fixedly installed at the output end of the motor (3), a pressure plate (7) is fixedly installed at the bottom of the electric push rod (8), a fixing block (6) is slidably installed at the bottom of the pressure plate (7), and a protective device is also provided on the top of the support platform (1). The protective device includes an inner rod (9), an outer rod (10), a slider (14), a push plate (15), and an inclined block (16). The outer rod (10) is rotatably mounted on the inner wall of the pressure plate (7). The inner rod (9) is slidably mounted on the inner wall of the outer rod (10). The slider (14) is slidably mounted on the bottom of the pressure plate (7). A square groove is provided on the outer wall of the outer rod (10). The push plate (15) is fixedly mounted on the side of the inner rod (9) near the square groove. The push plate (15) is in contact with the inner wall of the square groove. The inclined block (16) is fixedly mounted on the side of the push plate (15) near the slider (14). The support platform (1) is also provided with a pushing device for pushing the welding head (5) to move so that the welding is more uniform and a scraping device for avoiding the application of oil to the welded object. The protective device also includes a rotating plate (11), a limiting block (12) and a fixing plate (13). The rotating plate (11) is rotatably mounted on the top of the turntable (4). The limiting block (12) is slidably mounted on the inner wall of the turntable (4). The fixing plate (13) is fixedly mounted on the top of the support platform (1). A limiting groove is opened on the side of the fixing plate (13) near the limiting block (12). The limiting block (12) is in contact with the inner wall of the limiting groove. A first spring is provided between the inner rod (9) and the outer rod (10), a second spring is provided between the limiting block (12) and the turntable (4), a third spring is provided between the slider (14) and the pressure plate (7), and a fourth spring is provided between the welding head (5) and the support platform (1).

2. The laser welding fixture for sandwich panels according to claim 1, characterized in that: A first torsion spring is provided between the rotating plate (11) and the turntable (4), a second torsion spring is provided between the outer rod (10) and the pressure plate (7), the slider (14) is set as an inclined surface on the side near the push plate (15), and the limiting block (12) is set as an inclined surface on the side near the outer rod (10).

3. The laser welding fixture for sandwich panels according to claim 2, characterized in that: The pushing device includes a push plate (20), a pull plate (21), a first hydraulic rod (22), a first hydraulic cylinder (23), a second hydraulic cylinder (24), a second hydraulic rod (25), a baffle (26), a base plate (27), a push block (28), a sliding plate (29), and a square plate (291). The first hydraulic cylinder (23) is fixedly installed on the top of the pressure plate (7). The first hydraulic rod (22) is slidably installed on the inner wall of the first hydraulic cylinder (23). The pull plate (21) is fixedly installed on the end of the first hydraulic rod (22) away from the first hydraulic cylinder (23). The push plate (20) is fixedly installed on the top of the pressure plate (7). The second hydraulic cylinder (24) is fixedly installed on the top of the support platform (1), the second hydraulic rod (25) is slidably installed on the inner wall of the second hydraulic cylinder (24), the bottom plate (27) is slidably installed on the top of the support platform (1), the baffle (26) is slidably installed on the inner wall of the bottom plate (27), the push block (28) is fixedly installed on the side of the baffle (26) away from the welding head (5), the sliding plate (29) is slidably installed on the top of the support platform (1), and the square plate (291) is slidably installed on the circumferential surface of the rotating shaft of the turntable (4).

4. A laser welding fixture for sandwich panels according to claim 3, characterized in that: The first hydraulic cylinder (23) and the second hydraulic cylinder (24) are connected by a hose. A fifth spring is provided between the baffle (26) and the base plate (27). A sixth spring is provided between the pull plate (21) and the pressure plate (7). A seventh spring is provided between the sliding plate (29) and the support platform (1). The baffle (26) is in contact with the second hydraulic rod (25). The base plate (27) is in contact with the welding head (5).

5. A laser welding fixture for sandwich panels according to claim 4, characterized in that: The scraping device includes a connecting rod (30), a rack (31), a first gear (32), a second gear (33), a vertical plate (34), an oil tank (35), a rotating push rod (36), a sleeve rod (37), and a scraper (38). The vertical plate (34) is slidably mounted on the top of the support platform (1). The connecting rod (30) is fixedly mounted on the side of the base plate (27) near the vertical plate (34). The rack (31) is fixedly mounted on the side of the connecting rod (30) near the vertical plate (34). The first gear (32)... The second gear (33) is rotatably mounted on the top of the support platform (1), the second gear (33) is rotatably mounted on the side of the vertical plate (34) near the first gear (32), the oil tank (35) is fixedly mounted on the side of the vertical plate (34) near the first gear (32), the rotating push rod (36) is rotatably mounted on the side of the vertical plate (34) away from the first gear (32), the sleeve rod (37) is slidably mounted on the circumferential surface of the rotating push rod (36), and the scraper (38) is rotatably mounted on the side of the sleeve rod (37) away from the vertical plate (34).

6. A laser welding fixture for sandwich panels according to claim 5, characterized in that: The oil tank (35) and the sleeve rod (37) are connected by a telescopic tube. A first check valve is provided at the position where the sleeve rod (37) and the telescopic tube are connected. The scraper (38) is connected to the sleeve rod (37). A second check valve is provided at the position where the scraper (38) and the sleeve rod (37) are connected. An oil outlet is provided on the side of the scraper (38) near the plate. The shaft of the second gear (33) is connected to the rotating push rod (36) by a belt drive. An eighth spring is provided between the sleeve rod (37) and the rotating push rod (36).

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