L-shaped welding device

Abstract

The utility model discloses an L-shaped welding device. The L-shaped welding device comprises an L-shaped piece, a conveying assembly, a blocking structure, a positioning mechanism and a welding mechanical arm. The clamp is detachably mounted on the L-shaped piece; the blocking structure and the positioning mechanism are sequentially arranged in the front-back direction of the conveying assembly, the positioning mechanism comprises a first positioning piece, a second positioning piece and a lifting clamping structure, the first positioning piece is installed above the conveying assembly, and the second positioning piece is installed in front of the first positioning piece in the mode of being capable of moving front and back and moving up and down. The lifting and clamping structure can lift the L-shaped parts on the conveying assembly and position the L-shaped parts in the up-down direction and the left-right direction. The welding manipulator is positioned on one side of the positioning mechanism; due to the fact that the conveying assembly and the positioning mechanism are arranged, the welding precision is improved, the welding manipulator is adopted for welding, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil tank equipment field, especially relate to a L type welding device. BACKGROUND

[0002] In the production process of the oil tank, the U-shaped piece and the L-shaped piece need to be spliced, and some accessories need to be welded on the L-shaped piece before welding. The existing welding method of the accessories mainly relies on manual operation, which is low in efficiency and accuracy. SUMMARY

[0003] The utility model discloses a L type welding device, which can solve the technical problems in the prior art.

[0004] The utility model discloses a technical scheme as follows: an L-shaped piece, a conveying assembly, a blocking structure, a positioning mechanism and a welding manipulator are provided, the L-shaped piece includes a horizontal plate and a vertical plate, the lower end of the vertical plate is connected with the rear end of the horizontal plate, the horizontal plate is placed on the conveying assembly, and the conveying assembly can drive the horizontal plate to move forward; the blocking structure can block the horizontal plate on the conveying assembly; the positioning mechanism is installed on the conveying assembly and located in front of the blocking structure, and the positioning mechanism includes a first positioning piece, a second positioning piece and a lifting clamping structure, the first positioning piece is movably installed above the conveying assembly, the second positioning piece is movably installed in front of the first positioning piece in the forward and backward directions and the upward and downward directions, so that the second positioning piece can push the vertical plate onto the first positioning piece through the horizontal plate, and the lifting clamping structure can lift the horizontal plate and position it in the upward and downward directions and the left and right directions; the welding manipulator is located on one side of the positioning mechanism and is used for welding parts on the L-shaped piece.

[0005] According to the L type welding device, the L-shaped piece can be fixed on the conveying assembly through the blocking structure, so that workers can pre-weld parts on the L-shaped piece, the L-shaped piece with the pre-welded parts can be moved to the positioning mechanism, the first positioning piece and the second positioning piece can position the L-shaped piece in the forward and backward directions, the lifting clamping structure can position the L-shaped piece in the upward and downward directions and the left and right directions, and the welding manipulator can completely weld the parts.

[0006] Further, the lifting clamping structure includes:

[0007] A lifting part that can move up and down is used for lifting the horizontal plate on the conveying assembly;

[0008] Two movable clamping parts, two clamping parts are respectively located on the left and right sides of the conveying assembly, the clamping part can move up and down with the lifting part, when two clamping parts are close to each other, two clamping parts can clamp the horizontal plate between them.

[0009] The first clamp is used to press the horizontal plate on the lifting part.

[0010] Further, the width of the conveying assembly in the left and right direction is less than the width of the horizontal plate in the left and right direction.

[0011] The lifting part is two, two lifting parts are respectively located on the left and right sides of the conveying assembly, two lifting parts can jointly lift the horizontal plate, the clamping part is arranged on the side away from the conveying assembly of the lifting part.

[0012] Further, the lifting and clamping structure further comprises a first lifting platform movable up and down and a first cylinder for driving the first lifting platform up and down, the lifting part is installed on the first lifting platform, and the clamping part is movably installed on the first lifting platform.

[0013] Further, two clamping parts are movably installed on the first lifting platform through guide rails, the first lifting platform is installed at a position between two clamping parts, a rotatable gear is installed, one of the clamping parts is connected with a first rack, and the other clamping part is connected with a second rack, the first rack and the second rack are respectively located on the front and back sides of the gear and are engaged with the gear.

[0014] Further, the first clamp is arranged on the clamping part.

[0015] Further, the conveying assembly comprises two conveying belts arranged at intervals in the left and right directions.

[0016] Further, the first lifting platform is installed below the conveying belt, the first lifting platform has a movable seat movable forward and backward, the movable seat is located between two conveying belts, the first lifting platform is installed with a second cylinder, the second cylinder is used to drive the movable seat to move forward and backward, the second positioning member is movably installed on the movable seat, the movable seat is installed with a third cylinder, and the third cylinder is used to drive the second positioning member to move up and down.

[0017] Further, the blocking structure comprises a blocking member movable up and down, and the blocking member is arranged between two conveying belts.

[0018] Further, a fixed seat is installed between the two conveying belts, the blocking piece is movably installed on the fixed seat, and a fourth cylinder for driving the blocking piece to move up and down is installed on the fixed seat.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Additional aspects and advantages of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of non-limiting examples various embodiments of the present application.

[0021] Figure 1 is a structural schematic view of the L-shaped welding device of the present application technical scheme;

[0022] Figure 2 is a structural schematic view of the clamp installed on the L-shaped piece;

[0023] Figure 3 is a left view of the first positioning piece, the second positioning piece and the clamping part abutting against the L-shaped piece;

[0024] Figure 4 is a top view of the first positioning piece, the second positioning piece and the clamping part abutting against the L-shaped piece;

[0025] Figure 5 is a structural schematic view of the positioning mechanism;

[0026] Figure 6 is a partial structural schematic view of the positioning mechanism;

[0027] Figure 7 is a structural schematic view of the conveying assembly at the blocking structure.

[0028] Fig. 1 is a structural schematic view of the L-shaped welding device of the present application technical scheme; DETAILED DESCRIPTION

[0029] The technical solution of this utility model is described in detail below. Examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 As shown, the L-shaped welding device provided in the embodiment of this utility model includes a conveying assembly 100, an L-shaped component 200, a blocking structure 300, a positioning mechanism 500, and a welding robot (not shown in the figure). Figure 2 As shown, the L-shaped component 200 includes a horizontal plate 220 and a vertical plate 230. The lower end of the vertical plate 230 is connected to the rear end of the horizontal plate 220, as shown. Figure 1 As shown, a horizontal plate 220 is placed on the conveying assembly 100, which can drive the horizontal plate 220 to move forward; a blocking structure 300 can block the horizontal plate 220 on the conveying assembly 100; a positioning mechanism 500 is installed on the conveying assembly 100 and located in front of the blocking structure 300. The positioning mechanism 500 includes a first positioning member 510, a second positioning member 520, and a lifting and clamping structure 530. The first positioning member 510 is movably installed above the conveying assembly 100, such as... Figure 3As shown, the second positioning member 520 is movably installed in front of the first positioning member 510 in the front-to-back direction and the up-to-down direction, so that the second positioning member 520 can push the vertical plate 230 to the first positioning member 510 through the horizontal plate 220, and the lifting clamping structure 530 can lift the horizontal plate 220 and position it in the up-to-down direction and the left-to-right direction; the welding manipulator is located on one side of the positioning mechanism 500 and is used for welding the part 210 to the L-shaped piece 200.

[0034] By arranging the blocking structure 300, the L-shaped piece 200 can be fixed on the conveying assembly 100, and then the worker can pre-weld the part 210 to the L-shaped piece 200. Since the positioning mechanism 500 is located in front of the blocking structure 300, the L-shaped piece 200 with the pre-welded part 210 can be moved to the positioning mechanism 500, so that the first positioning member 510 and the second positioning member 520 can position the L-shaped piece 200 in the front-to-back direction, and the lifting clamping structure 530 can position the L-shaped piece 200 in the up-to-down direction and the left-to-right direction, which facilitates the welding manipulator to completely weld the part 210. Since the positioning mechanism 500 is arranged, the welding precision is improved, and the welding manipulator is used for welding, so that the work efficiency is improved.

[0035] Specifically, as shown in Figure 2 , the device further comprises a placing rack (not shown in the figure) and a clamp 400 placed on the placing rack. The placing rack is located on one side of the conveying assembly 100 and corresponds to the position of the blocking structure 300. The clamp 400 is detachably installed on the L-shaped piece 200, and the clamp 400 has a positioning portion 410 for positioning the part 210.

[0036] By arranging the placing rack, the operator can conveniently take and place the clamp 400. By arranging the clamp 400, the operator can accurately position the part 210 through the positioning portion 410, which facilitates the operator to weld the part 210.

[0037] In operation, as shown in Figure 1 , the horizontal plate 220 is placed on the conveying assembly 100, and the conveying assembly 100 drives the horizontal plate 220 to move forward. When the horizontal plate 220 is about to pass through the blocking structure 300, the blocking structure 300 blocks the L-shaped piece 200 from moving forward, so that the L-shaped piece 200 cannot move and is fixed on the conveying assembly 100. The operator takes out the clamp 400 from the placing rack and installs the clamp 400 on the L-shaped piece 200. The operator places the part 210 on the positioning portion 410 according to the position of the positioning portion 410. The operator pre-welds the part 210 to the L-shaped piece 200. After the pre-welding is completed, the operator detaches the clamp 400 and places it back on the placing rack. The blocking structure 300 no longer blocks the L-shaped piece 200 from moving, and the L-shaped piece 200 continues to move forward under the drive of the conveying assembly 100.

[0038] When the L-shaped piece 200 moves between the first positioning member 510 and the second positioning member 520, the lifting and clamping structure 530 lifts the horizontal straight plate 220 of the L-shaped piece 200 and clamps the left and right sides and the upper and lower sides, so as to realize the left-right direction positioning and the up-down direction positioning of the L-shaped piece 200. During the lifting and / or clamping, the first positioning member 510 also moves to the top of the conveying assembly 100, as shown in Figure 3 、 4 The second positioning member 520 also moves backward and upward, and then the second positioning member 520 abuts against the front end of the horizontal straight plate 220 and pushes it to move backward, so that the vertical plate 230 of the L-shaped piece 200 abuts against the first positioning member 510, thereby the first positioning member 510 and the second positioning member 520 clamp the L-shaped piece 200 together to realize the front-back direction positioning.

[0039] After the positioning is completed, the welding manipulator is started, and the welding manipulator completely welds the part 210 on the L-shaped piece 200.

[0040] After the welding is completed, the second positioning member 520 moves forward and downward, and at the same time, the lifting and clamping structure 530 places the L-shaped piece 200 on the conveying assembly 100. The conveying assembly 100 can continue to convey the L-shaped piece 200 to move forward, so that the L-shaped piece 200 moves out of the conveying assembly 100.

[0041] Specifically, the part 210 can be a fixed column, a horizontal rod, or other parts 210 that need to be welded inside an oil tank; and the positioning part 410 is specifically designed according to the position and shape that the part 210 needs to be positioned.

[0042] Specifically, the conveying assembly 100 extends in the front-back direction, and the conveying assembly 100 drives the L-shaped piece 200 to move forward.

[0043] Further, as shown in Figure 1 、 5 The lifting and clamping structure 530 comprises:

[0044] A lifting part 531 that is movable up and down, used for lifting the horizontal straight plate 220 on the conveying assembly 100;

[0045] Two clamping parts 532 that are movable left and right, the two clamping parts 532 are respectively located on the left and right sides of the conveying assembly 100, the clamping part 532 can move up and down with the lifting part 531, and when the two clamping parts 532 are close to each other, the two clamping parts 532 can clamp the horizontal straight plate 220 therebetween;

[0046] A first clamp 533 used for pressing the horizontal straight plate 220 on the lifting part 531.

[0047] The lifting and clamping structure 530 adopts such a structure, which is convenient for the up-down direction positioning and the left-right direction positioning of the L-shaped piece 200.

[0048] In operation, as shown in Figure 1 , 5 , the conveying assembly 100 drives the horizontal plate 220 of the L-shaped piece 200 to move above the lifting part 531 and between the two clamping parts 532. The lifting part 531 moves upward, and the lifting part 531 drives the horizontal plate 220 to move upward, so that the L-shaped piece 200 moves away from the conveying assembly 100. At the same time, the two clamping parts 532 also move upward with the lifting part 531. After the upward movement is completed, as shown in Figure 1 , 4 , the two clamping parts 532 move towards each other, and the two clamping parts 532 clamp the left and right sides of the horizontal plate 220, so as to realize the positioning of the L-shaped piece 200 in the left-right direction. As shown in Figure 1 , 6 , the first clamp 533 also presses the horizontal plate 220 on the lifting part 531, so as to realize the positioning of the L-shaped piece 200 in the up-down direction.

[0049] Further, as shown in Figure 1 , 5 , the width of the conveying assembly 100 in the left-right direction is less than the width of the horizontal plate 220 in the left-right direction.

[0050] The lifting part 531 is two, and the two lifting parts 531 are respectively located on the left and right sides of the conveying assembly 100. The two lifting parts 531 can jointly lift the horizontal plate 220, and the clamping part 532 is arranged on the side of the lifting part 531 away from the conveying assembly 100.

[0051] Since the width of the conveying assembly 100 in the left-right direction is less than the width of the horizontal plate 220 in the left-right direction, the lifting part 531 can be located on one side of the conveying assembly 100 and can also lift the horizontal plate 220, and it is also convenient for the two clamping parts 532 to clamp the left and right sides of the L-shaped piece 200. By arranging the lifting part 531 on the left and right sides of the conveying assembly 100, the L-shaped piece 200 can be smoothly lifted.

[0052] It can be understood that the width value of the horizontal plate 220 in the left-right direction is greater than the distance value between the end of one of the lifting parts 531 away from the conveying assembly 100 and the end of the other lifting part 531 away from the conveying assembly 100, so as to ensure that the two clamping parts 532 can clamp the left and right sides of the L-shaped piece 200, and the lifting part 531 does not block the clamping of the L-shaped piece 200 by the clamping part 532.

[0053] Further, as shown in Figure 5 , the lifting and clamping structure 530 further comprises a first lifting platform 534 which can move up and down and a first cylinder 501 for driving the first lifting platform 534 to move up and down. The lifting part 531 is installed on the first lifting platform 534, and the clamping part 532 is movably installed on the first lifting platform 534.

[0054] With the structure, the lifting part 531 and the clamping part 532 are ensured to move synchronously up and down.

[0055] Specifically, the L-shaped welding device further comprises a frame, the first lifting platform 534 is movably installed on the frame, the first cylinder 501 is installed on the frame, and the first cylinder 501 is used to drive the first lifting platform 534 to move up and down.

[0056] Specifically, the conveying assembly 100 can also be installed on the frame.

[0057] Further, as shown in Figure 5 , 6 two clamping parts 532 are movably installed on the first lifting platform 534 through guide rails, the first lifting platform 534 is provided with a rotatable gear 535 at a position between the two clamping parts 532, one of the clamping parts 532 is connected with a first rack 536, the other clamping part 532 is connected with a second rack 537, and the first rack 536 and the second rack 537 are respectively located on the front and back sides of the gear 535 and are engaged with the gear 535.

[0058] The two clamping parts 532 are connected with the gear 535 through the first rack 536 and the second rack 537, so that the two clamping parts 532 can move synchronously, ensuring the accuracy of positioning.

[0059] Further, as shown in Figure 5 , the first clamp 533 is arranged on the clamping part 532. In this way, the structure of the lifting and clamping structure 530 is simple.

[0060] Further, as shown in Figure 1 , the conveying assembly 100 comprises two conveying belts 110 arranged in a left-right direction and spaced apart, so that the positions between the two conveying belts 110 can be provided with other structures, making the structure of the L-shaped welding device compact.

[0061] Further, as shown in Figure 1 , the first lifting platform 534 is installed below the conveying belt 110, the first lifting platform 534 is provided with a movable seat 502 that can move forward and backward, the movable seat 502 is located between the two conveying belts 110, the first lifting platform 534 is provided with a second cylinder 503, the second cylinder 503 is used to drive the movable seat 502 to move forward and backward, the second positioning member 520 is movably installed on the movable seat 502, the movable seat 502 is provided with a third cylinder 504, and the third cylinder 504 is used to drive the second positioning member 520 to move up and down. With the above structure, the space between the two conveying belts 110 is fully utilized, making the structure of the L-shaped welding device compact.

[0062] When positioning is needed, the third cylinder 504 drives the second positioning member 520 to move upward and the second cylinder 503 drives the moving base 502 to move backward, so that the position of the second positioning member 520 corresponds to the position of the horizontal straight plate 220, and the second positioning member 520 can push the L-shaped member 200 to move backward through the horizontal straight plate 220.

[0063] Specifically, the second positioning member 520 comprises a mounting seat and a plurality of rollers arranged in the left-right direction, the mounting seat is mounted on the moving base 502, and the rollers are mounted on the rear side of the mounting seat.

[0064] As shown in Figure 1 , 5 , specifically, two lifting portions 531 are provided, one of which is located to the left of the leftmost conveying belt 110 and is mounted on the first lifting platform 534, and one clamping portion 532 is located to the left of one of the lifting portions 531 and is mounted on the first lifting platform 534, the other lifting portion 531 is located to the right of the rightmost conveying belt 110 and is mounted on the first lifting platform 534, and the other clamping portion 532 is located to the right of the other lifting portion 531 and is mounted on the first lifting platform 534.

[0065] The two lifting portions 531 and the two clamping portions 532 are arranged as described above, which facilitates up and down movement.

[0066] Further, as shown in Figure 1 , 7 , the blocking structure 300 comprises a blocking member 310 which can move up and down, the blocking member 310 is arranged between the two conveying belts 110, and the space between the two conveying belts 110 is fully utilized, so that the structure of the L-shaped welding device is compact.

[0067] When the L-shaped member 200 needs to be blocked for pre-welding the part 210, the blocking member 310 moves upward and extends above the conveying assembly 100, thereby blocking the L-shaped member 200 from moving with the conveying belt 110; after the pre-welding is completed, the blocking member 310 moves downward, so that the L-shaped member 200 continues to move forward under the action of the conveying belt 110.

[0068] Further, a fixed seat 505 is mounted between the two conveying belts 110, the blocking member 310 is movably mounted on the fixed seat 505, and a fourth cylinder (not shown in the figure) for driving the blocking member 310 to move up and down is mounted on the fixed seat 505.

[0069] During operation, the fourth cylinder drives the blocking member 310 to move up and down relative to the fixed seat 505.

[0070] Further, as shown in Figure 7As shown, the lower part of the conveying belt 110 is provided with a second lifting platform 120 which can be lifted up and down, and the second lifting platform 120 is provided with a rotating part 130 which can be rotated, and the rotating part 130 is located between the two conveying belts 110 and behind the blocking part 310.

[0071] Since the second lifting platform 120 can be lifted up, the rotating part 130 can lift the L-shaped part 200, and the rotating part 130 can be rotated, so that the L-shaped part 200 which is blocked by the blocking part 310 can be rotated after being lifted up to a certain height, and when the L-shaped part 200 is large, the workers can conveniently weld by rotating.

[0072] Specifically, the second lifting platform 120 is provided with a motor, and the rotating part 130 is installed on the motor, and when working, the motor drives the rotating part 130 to rotate.

[0073] Specifically, as shown, Figure 5 Specifically, the first positioning part 510 is two, and the two first positioning parts 510 are arranged in the left-right direction, and by arranging two first positioning parts 510, the first positioning part 510 can be located on the conveying belt 110 or outside the conveying belt 110 without moving a large distance, which is convenient for positioning the L-shaped part 200.

[0074] Specifically, the first positioning part 510 is provided with a second clamp 506, and when the vertical plate 230 abuts against the first positioning part 510, the second clamp fixes the vertical plate 230 on the first positioning part 510, preventing the L-shaped part 200 from moving during welding.

[0075] Although the technical scheme of the present application has been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these technical schemes without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An L-shaped welding device, comprising an L-shaped component, the L-shaped component including a horizontal plate and a vertical plate, the lower end of the vertical plate being connected to the rear end of the horizontal plate, characterized in that, Also includes: A conveying assembly, wherein the horizontal plate is placed on the conveying assembly, and the conveying assembly is capable of driving the horizontal plate to move forward; The blocking structure is capable of blocking the horizontal and vertical plates on the conveying assembly; A positioning mechanism is installed on the conveying assembly and located in front of the blocking structure. The positioning mechanism includes a first positioning member, a second positioning member, and a lifting and clamping structure. The first positioning member is movably installed above the conveying assembly. The second positioning member is movably installed in front of the first positioning member and can move forward and backward and up and down so that the second positioning member can push the vertical plate onto the first positioning member through the horizontal plate. The lifting and clamping structure can lift the horizontal plate and position it in the up-down and left-right directions. A welding robot, located on one side of the positioning mechanism, is used to weld parts onto the L-shaped component.

2. The L-shaped welding device according to claim 1, characterized in that: The lifting and clamping structure includes: A lifting section that can move up and down is used to lift the horizontal plate on the conveying assembly; Two clamping parts that can move left and right are located on the left and right sides of the conveying assembly, respectively. The clamping parts can move up and down with the lifting part. When the two clamping parts are close to each other, they can clamp the horizontal plate between them. The first clamp is used to press the horizontal plate firmly onto the lifting part.

3. The L-shaped welding device according to claim 2, characterized in that: The width of the conveying component in the left-right direction is smaller than the width of the horizontal plate in the left-right direction; There are two lifting parts, which are located on the left and right sides of the conveying assembly, respectively. The two lifting parts can lift the horizontal plate together. The clamping part is located on the side of the lifting part away from the conveying assembly.

4. The L-shaped welding apparatus according to claim 2 or 3, characterized in that: The lifting and clamping structure further includes a first lifting platform that can move up and down and a first cylinder for driving the first lifting platform to move up and down. The lifting part is installed on the first lifting platform, and the clamping part is installed on the first lifting platform that can move left and right.

5. The L-shaped welding device according to claim 4, characterized in that: Two clamping parts are movably mounted on the first lifting platform via guide rails. A rotatable gear is mounted on the first lifting platform between the two clamping parts. One of the clamping parts is connected to a first rack, and the other clamping part is connected to a second rack. The first rack and the second rack are located on the front and rear sides of the gear, respectively, and mesh with the gear.

6. The L-shaped welding device according to claim 3, characterized in that: The first clamp is disposed on the clamping part.

7. The L-shaped welding device according to claim 4, characterized in that: The conveying assembly includes two conveyor belts spaced apart in the left-right direction.

8. The L-shaped welding apparatus according to claim 7, characterized in that: The first lifting platform is installed below the conveyor belt. The first lifting platform has a movable seat that can move back and forth. The movable seat is located between the two conveyor belts. The first lifting platform is equipped with a second cylinder, which is used to drive the movable seat to move back and forth. The second positioning member is movably installed on the movable seat. The movable seat is equipped with a third cylinder, which is used to drive the second positioning member to move up and down.

9. The L-shaped welding apparatus according to claim 7, characterized in that: The blocking structure includes a blocking member that can move up and down, and the blocking member is disposed between the two conveyor belts.

10. The L-shaped welding apparatus according to claim 9, characterized in that: A fixed base is installed between the two conveyor belts, and the blocking member is movably mounted on the fixed base. A fourth cylinder for driving the blocking member to move up and down is installed on the fixed base.

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