Positioning device for welding engine hood

Abstract

The present invention discloses a positioning device for welding an engine hood, which belongs to the technical field of welding supports, and includes a rotary table, the top of which is rotatably connected to a support platform, the top of which is provided with a travel slot, the inner cavity of the travel is provided with a plurality of angle control mechanisms, and the tops of the plurality of angle control mechanisms are respectively provided with a clamping mechanism and a control mechanism, the inner cavity of the travel slot is provided with a welding slag guiding mechanism, and the welding slag guiding mechanism is located on one side of an adjacent angle control mechanism. In the present invention, by adjusting the displacement of multiple groups of clamping mechanisms and control mechanisms, full adaptation to different welding clamping needs is achieved, and the welding adaptability to the engine hood is improved. The rotation of the moving seat can drive the top linear module and the clamping mechanism to adjust the relative deflection direction angle, and the clamping adaptability in the case of multi-point clamping is improved by fine-tuning the clamping angle.

Description

Technical Field

[0001] The invention belongs to the technical field of welding brackets, and in particular relates to a positioning device for welding an engine hood. Background Art

[0002] The car hood is an important part of the vehicle's engine compartment, usually called the hood or front cover. The main function of the hood is to protect the engine and its components from external factors. The hood is composed of multiple parts, including outer panels, inner panels, lock fixing plates, reinforcement plates, etc. These parts usually need to be fixed and connected by welding during assembly. Welding can ensure the structural strength and rigidity of the hood, so that it can withstand various forces and vibrations during vehicle driving.

[0003] A Chinese invention patent with authorization announcement number CN108687452B discloses a laser welding tool for a large aircraft engine cover, including a support frame, a mold frame, a cylinder, a beam, and a mold bracket, wherein the mold frame, the cylinder and the mold bracket are respectively mounted on the support frame; the mold bracket is mounted at the bottom of the support frame, the mold frame is correspondingly mounted above the mold bracket, the cylinder is mounted on the support frame, the beam is rotatably mounted on the mold frame through a rotating seat, one end of the beam is connected to the cylinder to form a lever structure with the rotating seat as a fulcrum, and the other end of the beam is detachably connected to the mold frame. The above scheme achieves the technical effect of not requiring repeated disassembly and assembly of the beam through the movable beam, but in actual use, the abutment control of the edge position of the engine cover is easily limited by the angle of the processed plate shape, and the fixed-direction fixture is prone to gaps between the clamping points, resulting in the impact of the welding flame during welding causing the inner and outer plates to move, affecting the uniformity of the weld, and there is room for improvement. Summary of the invention

[0004] The purpose of the present invention is to propose a positioning device for engine hood welding in order to solve the problem that due to the limitation of the special-shaped angle of the processed plate, gaps are easily formed between the clamping points of the fixed-direction clamp, resulting in the impact of the welding flame during welding, causing the inner and outer plates to move, affecting the uniformity of the weld.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A positioning device for welding an engine hood, comprising a rotary table, the top of the rotary table is rotatably connected to a support platform, the top of the support platform is equipped with a travel slot, the travel inner cavity is provided with a plurality of angle control mechanisms, and the tops of the plurality of angle control mechanisms are respectively equipped with a clamping mechanism and a resisting mechanism, the angle control mechanism comprises a moving seat, the moving seat is rotatably connected to the travel slot, and the contact orientation position of the clamping mechanism and the resisting mechanism with the engine hood to be welded is adjusted by the rotating moving seat;

[0007] A welding slag guiding mechanism is installed in the inner cavity of the travel groove, and the welding slag guiding mechanism is located on one side of the adjacent angle control mechanism. The welding slag guiding mechanism includes a suction head, and the suction head extends to one side of the clamping mechanism at the corresponding position, and guides the welding flame through the welding slag guiding mechanism.

[0008] As a further description of the above technical solution:

[0009] The bottom of the moving seat is connected to a control ring, and one side of the outer wall of the control ring is connected to a rotating block, one side of the rotating block is rotatably connected to a rotating pair, and the side of the rotating pair away from the rotating block is rotatably connected to a connecting rod, the inner side of the travel groove is provided with a slot for the connecting rod to slide, one end of the connecting rod away from the rotating pair passes through the slot and is rotatably connected to a first rotating frame, one side of the first rotating frame is connected to an electric push rod, and one end of the electric push rod away from the first rotating frame is connected to a second rotating frame, the second rotating frame is rotatably connected to a fixed block, and the fixed block is connected to the outer side of the travel groove.

[0010] As a further description of the above technical solution:

[0011] The top of the movable seat is connected with a linear module, a slidable screw seat is arranged in the linear module, and the top of the screw seat is connected with a clamping mechanism or a resisting mechanism at a corresponding position.

[0012] As a further description of the above technical solution:

[0013] The welding slag guiding mechanism includes a suction pipe, a slag collecting groove is connected to the bottom of the suction pipe, the slag collecting groove is connected to the travel groove, the top of the suction pipe is connected to a guide pipe, the guide pipe is rotatably connected to an adjustment pipe on the side away from the suction pipe, and the adjustment pipe is telescopically connected to a suction head on the side away from the guide pipe, which extends to the bottom side of the weld to suck the welding flame.

[0014] As a further description of the above technical solution:

[0015] The slag collecting cavity is provided with a plurality of blocking blocks and filter elements arranged alternately in sequence along an arc direction, one side of the blocking block is provided with two flame extinguishing grooves inclined to each other, an exhaust groove is provided through the flame extinguishing cavity, and the exhaust groove extends to one side of the filter element at a corresponding position, and one side of the slag collecting groove is connected to an external negative pressure suction device through a pipeline.

[0016] As a further description of the above technical solution:

[0017] A support rod is provided at one side of the suction pipe, and two ends of the support rod are respectively connected to corresponding positions of the guide pipe and one side of the slag collecting tank.

[0018] As a further description of the above technical solution:

[0019] The top of the adjustment tube is connected to a driven gear through a shaft body passing through a guide tube, one side of the driven gear is meshed with a limiting gear ring, one side of the limiting gear ring is connected to a guide rod, a guide sleeve is provided outside the guide rod, a spring is provided on the outer wall of the guide rod, two ends of the spring are respectively connected to the guide sleeve and corresponding positions on one side of the end of the guide rod, and the movement of the adjustment tube relative to the guide tube is limited by the meshing of the limiting gear ring and the driven gear.

[0020] As a further description of the above technical solution:

[0021] The side of the adjustment tube away from the guide tube is connected to an expansion frame, the inner cavity of the expansion frame is slidably connected to a connecting tube, one end of the connecting tube passes through the expansion frame and is connected to the suction head, and the other end of the connecting tube is connected to the front end of the adjustment tube through a telescopic tube.

[0022] As a further description of the above technical solution:

[0023] The suction head is externally sleeved with a clamping block, one side of which is connected to a side of the unfolding frame close to the suction head, and the suction head is moved in the clamping block to clamp and abut against the component to be processed.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, through the designed angle control mechanism, the rotation of the rotary table can control the multiple clamping mechanisms and the control mechanism on the top side of the supporting platform to adjust the clamping and abutting range. At the same time, the control mechanism can reduce the movement during welding by the abutment at the top position of the component edge. Multiple linear modules can adjust the relative radial positions between adjacent clamping mechanisms to meet the welding clamping needs of plate components with different edges. Through the displacement adjustment of multiple groups of clamping mechanisms and the control mechanism, full adaptation to different welding clamping needs is achieved, and the welding adaptability to the engine hood is improved. The rotation of the moving seat can drive the top linear module and the clamping mechanism to adjust the relative deflection direction angle, and the clamping adaptability in the multi-point clamping situation is improved by fine-tuning the clamping angle.

[0026] 2. In the present invention, through the designed welding slag guiding mechanism, when welding flame smoke and welding slag are generated, the negative pressure suction device can suck the smoke generated by the welding flame into the connecting pipe through the suction head through negative pressure suction, and the welding smoke in the connecting pipe can enter the suction pipe and the slag collecting tank in turn through the pipeline. The high-temperature smoke entering the slag collecting tank can be guided by the blocking block and cooled by contact with the flame extinguishing groove in the blocking block, and then contact with the rear filter element through the rear exhaust groove to adsorb impurities, and then discharged to the outside through the negative pressure suction device, thereby achieving the purification and emptying of the smoke during welding, avoiding the smoke from affecting the visibility of the welding surface, and improving the welding adaptability.

[0027] 3. In the present invention, when the suction head is located at the bottom side of the weld, the guide rod is pulled to move in the guide sleeve to drive the limiting gear ring to separate from the driven gear. The driven gear can drive the bottom adjustment tube to adjust the orientation angle of the front suction head without being limited. The suction head angle is adjusted to be located in the spreading area of ​​welding flame and dust. The suction head and the clamping mechanism are separated to adjust the distance between the suction head and the clamping point, thereby improving the adjustment adaptability of the suction range. The radial position of the suction head is adjusted by sliding the clamp block and the connecting tube in the unfolding frame, and the corresponding positions of the connecting tube and the front clamp block from the unfolding frame are adjusted to facilitate the precise adjustment of the suction point. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a positioning device for welding an engine hood proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the disassembled structure of a positioning device for welding an engine hood proposed by the present invention;

[0030] Figure 3 This is a schematic diagram of the angle control mechanism structure of a positioning device for welding an engine hood proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the disassembled structure of an angle control mechanism of a positioning device for welding an engine hood proposed by the present invention;

[0032] Figure 5 A schematic diagram of the lateral structure of a welding slag guiding mechanism of a positioning device for welding an engine hood proposed by the present invention;

[0033] Figure 6 The present invention proposes Figure 5 The enlarged structural diagram of part A in the middle;

[0034] Figure 7 This is a schematic diagram of the disassembled structure of a welding slag guiding mechanism of a positioning device for welding an engine hood proposed by the present invention;

[0035] Figure 8 A schematic diagram of a top view of the structure of a welding slag guiding mechanism of a positioning device for welding an engine hood proposed by the present invention;

[0036] Fig. 9 The present invention proposes Figure 8 Schematic diagram of the enlarged structure of part B.

[0037] Legend:

[0038] 1. Support platform; 2. Rotary table; 3. Travel slot; 4. Angle control mechanism; 401. Moving seat; 402. Linear module; 403. Screw seat; 404. Control ring; 405. Rotating block; 406. Rotating pair; 407. Connecting rod; 408. First rotating frame; 409. Electric push rod; 410. Second rotating frame; 411. Fixed block; 5. Slag guiding mechanism; 501. Suction pipe; 502. Support rod; 50 3. Slag collecting trough; 504. Filter element; 505. Blocking block; 506. Exhaust groove; 507. Flame extinguishing groove; 508. Guide pipe; 509. Driven gear; 510. Limiting gear ring; 511. Guide rod; 512. Guide sleeve; 513. Spring; 514. Adjusting pipe; 515. Expanding frame; 516. Connecting pipe; 517. Telescopic pipe; 518. Clamping block; 519. Suction head; 6. Clamping mechanism; 7. Resistance control mechanism. DETAILED DESCRIPTION

[0039] 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.

[0040] See also Figure 1-Figure 9 The present invention provides a technical solution: a positioning device for welding an engine hood, comprising a rotary table 2, a support platform 1 is rotatably connected to the top of the rotary table 2, a travel groove 3 is installed on the top of the support platform 1, a plurality of angle control mechanisms 4 are arranged in the inner cavity of the travel groove 3, and a clamping mechanism 6 and a resisting mechanism 7 are respectively installed on the top of the plurality of angle control mechanisms 4;

[0041] A welding slag guiding mechanism 5 is installed in the inner cavity of the travel groove 3. The welding slag guiding mechanism 5 is located on one side of the adjacent angle control mechanism 4. The welding slag guiding mechanism 5 includes a suction head 519. The suction head 519 extends to one side of the clamping mechanism 6 at the corresponding position, and guides the welding flame through the welding slag guiding mechanism 5.

[0042] The angle control mechanism 4 includes a moving seat 401, which is rotatably connected to the travel groove 3. A control ring 404 is connected to the bottom of the moving seat 401, and a rotating block 405 is connected to one side of the outer wall of the control ring 404. A rotating pair 406 is rotatably connected to one side of the rotating block 405, and a connecting rod 407 is rotatably connected to the side of the rotating pair 406 away from the rotating block 405. A slot for sliding the connecting rod 407 is provided on the inner side of the travel groove 3. One end of the connecting rod 407 away from the rotating pair 406 passes through the slot and is rotatably connected to a first rotating frame 408. An electric push rod 409 is connected to one side of the first rotating frame 408. One end of the electric push rod 409 away from the first rotating frame 408 is connected to a second rotating frame 410. A fixed block 411 is rotatably connected in the second rotating frame 410, and the fixed block 411 is connected to one side of the outside of the travel groove 3.

[0043] The top of the movable seat 401 is connected to a linear module 402, a slidable screw seat 403 is provided inside the linear module 402, and the top of the screw seat 403 is connected to a clamping mechanism 6 or a control mechanism 7 at a corresponding position;

[0044] Furthermore, the clamping mechanism 6 includes a fixed part and a clamping part, the clamping part is expandably hinged to one side of the fixed part, and the clamping part is driven by a pneumatic drive element, and the fixed part is connected to the top of the screw seat 403 at the corresponding position, and the control mechanism 7 includes a supporting part, the supporting part is connected to the top of the screw seat 403 at the corresponding position, and one side of the supporting part is adjustably connected with a height-adjustable abutment joint, the clamping mechanism 6 is used to clamp the side of the workpiece to be welded, and the abutment mechanism 7 is used to abut the edge of the workpiece to be welded.

[0045] Specifically, through the designed angle control mechanism 4, the multiple clamping mechanisms 6 and the control mechanisms 7 on the top side of the support platform 1 can be controlled to adjust the clamping and abutting range by rotating the rotary table 2, and the clamping mechanism 6 can improve the assembly stability by clamping the edge of the component, and the control mechanism 7 can reduce the movement during welding by the abutment at the top position of the component edge. At the same time, multiple linear modules 402 can adjust the relative radial positions between adjacent clamping mechanisms 6 to meet the welding clamping needs of plate components with different edges. Through the displacement adjustment of multiple groups of clamping mechanisms 6 and the control mechanisms 7, full adaptation to different welding clamping needs is achieved, and the welding adaptability to the engine hood is improved;

[0046] Furthermore, through the designed moving seat 401, when it is necessary to independently adjust the orientation angle of a single clamping mechanism 6, the corresponding side electric push rod 409 can be controlled to work and extend to drive the first rotating frame 408 to push the connecting rod 407. One end of the connecting rod 407 is pushed to drive the rotating block 405 at the other end to push the control ring 404 and the moving seat 401 to rotate. The rotation of the moving seat 401 can drive the top linear module 402 and the clamping mechanism 6 to adjust the relative deflection orientation angle, which is beneficial to improve the clamping adaptability in multi-point clamping conditions by fine-tuning the clamping angle and reduce the clamping error.

[0047] See also Figure 6-Figure 9 The welding slag guiding mechanism 5 includes a suction pipe 501, a slag collecting groove 503 is connected to the bottom of the suction pipe 501, the slag collecting groove 503 is connected to the stroke groove 3, a guide pipe 508 is connected to the top of the suction pipe 501, and the side of the guide pipe 508 away from the suction pipe 501 is rotatably connected to an adjustment pipe 514, and the front end of the adjustment pipe 514 is telescopically connected to a suction head 519, which extends to the bottom side of the weld to suck the welding flame;

[0048] The inner cavity of the slag collecting tank 503 is provided with a plurality of blocking blocks 505 and filter elements 504 arranged alternately in an arc direction, one side of the blocking block 505 is provided with two flame extinguishing grooves 507 inclined to each other, an exhaust groove 506 is provided through the inner cavity of the flame extinguishing groove 507, and the exhaust groove 506 extends to the side of the filter element 504 at a corresponding position, one side of the slag collecting tank 503 is connected with an external negative pressure suction device through a pipeline, and one side of the suction pipe 501 is provided with a support rod 502, and both ends of the support rod 502 are respectively connected with the guide pipe 508 and the corresponding positions of one side of the slag collecting tank 503.

[0049] Specifically: through the designed welding slag guiding mechanism 5, when welding flame smoke and welding slag are generated, the negative pressure suction device can suck the smoke generated by the welding flame into the connecting pipe 516 through the suction head 519 by negative pressure suction, and the welding smoke in the connecting pipe 516 can enter the suction pipe 501 and the slag collecting tank 503 in turn through the pipeline. The high-temperature smoke entering the slag collecting tank 503 can be cooled by the guided contact with the flame extinguishing groove 507 in the blocking block 505 and contact with the filter element 504 through the exhaust groove 506 to adsorb impurities and then be discharged outwardly through the negative pressure suction device, thereby realizing the purification and emptying of the smoke during welding, avoiding the smoke from affecting the visibility of the welding surface, and improving the welding adaptability.

[0050] See also Figure 8-Figure 9The top of the adjustment tube 514 is connected to a driven gear 509 through the guide tube 508 via a shaft, one side of the driven gear 509 is meshed with a limited tooth ring 510, one side of the limited tooth ring 510 is connected to a guide rod 511, a guide sleeve 512 is provided on the outer sleeve of the guide rod 511, a spring 513 is provided on the outer wall of the guide rod 511, and both ends of the spring 513 are respectively connected to the corresponding positions of the guide sleeve 512 and the end of the guide rod 511, and the movement of the adjustment tube 514 relative to the guide tube 508 is limited by the meshing of the limited tooth ring 510 and the driven gear 509;

[0051] The front section of the adjustment tube 514 away from the guide tube 508 is connected to an expansion frame 515, and the inner cavity of the expansion frame 515 is slidably connected to a connecting tube 516. One end of the connecting tube 516 passes through the expansion frame 515 and is connected to the suction head 519, and the other end of the connecting tube 516 is connected to the front end of the adjustment tube 514 through a telescopic tube 517.

[0052] A clamping block 518 is sleeved on the outside of the suction head 519 , and one side of the clamping block 518 is connected to the side of the unfolding frame 515 close to the suction head 519 . The suction head 519 moves in the clamping block 518 to clamp and abut against the component to be processed.

[0053] Specifically, when the suction head 519 is located at the bottom side of the weld, the guide rod 511 can be pulled to move in the guide sleeve 512 to drive the limiting gear ring 510 to separate from the driven gear 509. At this time, the driven gear 509 can drive the bottom adjustment tube 514 to adjust the direction of the front suction head 519 without being limited, which is conducive to adjusting the angle of the suction head 519 so that the suction head 519 is located in the spreading area of ​​the welding flame and dust, thereby improving the suction effect. In addition, by separating the suction head 519 from the clamping mechanism 6, the distance between the suction head 519 and the clamping point can be adjusted, thereby improving the adjustment adaptability of the suction range.

[0054] Furthermore, the radial position of the suction head 519 can be adjusted by sliding the clamping block 518 and the connecting tube 516 in the unfolding frame 515, so as to facilitate the adjustment of the suction position;

[0055] In another embodiment, not shown in the figure, a limit block is connected between the connecting tube 516 and the telescopic tube 517, and the grooves on both sides of the limit block can slide in the array of convex points arranged on both sides of the inner cavity of the unfolding frame 515 to adjust the corresponding positions of the connecting tube 516 and the front clamping block 518 from the unfolding frame 515, thereby improving the stability of the device;

[0056] The adjustment tube 514 and the guide tube 508 are connected via a flexible pipe to maintain the gas flow effect.

[0057] Working principle: When in use, the multiple clamping mechanisms 6 and the abutment mechanism 7 on the top peripheral side of the support platform 1 are rotated and controlled by the rotary table 2 to adjust the clamping and abutting range. The clamping mechanism 6 improves the assembly stability by clamping the edge of the component. At the same time, the abutment of the abutment mechanism 7 at the top position of the component edge reduces the movement during welding. Multiple linear modules 402 adjust the relative radial positions between adjacent clamping mechanisms 6 to facilitate the clamping of the welding of plate components with different edges.

[0058] When it is necessary to independently adjust the orientation angle of a single clamping mechanism 6, the electric push rod 409 on the corresponding side is controlled to work and extend to drive the first rotating frame 408 to push the connecting rod 407. The connecting rod 407 is pushed on one side to drive the rotating block 405 on the other side to drive the control ring 404 and the moving seat 401 to rotate. The rotation of the moving seat 401 drives the top linear module 402 and the clamping mechanism 6 to adjust the relative deflection orientation angle.

[0059] When welding generates welding flame smoke and welding slag, the negative pressure suction device uses negative pressure to suck the smoke generated by the welding flame into the connecting pipe 516 through the suction head 519, and the welding smoke in the connecting pipe 516 enters the suction pipe 501 and the slag collecting tank 503 in turn through the pipeline. The high-temperature smoke entering the slag collecting tank 503 is cooled by the guided contact with the flame extinguishing groove 507 in the blocking block 505 and contacts with the rear filter element 504 through the rear exhaust groove 506 to absorb impurities, and then is discharged outward through the negative pressure suction device;

[0060] By pulling the guide rod 511 to move in the guide sleeve 512, the limiting gear ring 510 is driven to separate from the driven gear 509. The driven gear 509 drives the bottom adjustment tube 514 to adjust the direction angle of the front suction head 519 without being limited. By adjusting the angle of the suction head 519, the suction head 519 is located in the spreading area of ​​the welding flame and dust.

[0061] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning device for welding an engine hood, comprising a rotary table (2), the top of which is rotatably connected to a support platform (1), characterized in that: A travel groove (3) is installed on the top of the support platform (1); a plurality of angle control mechanisms (4) are provided in the inner cavity of the travel groove (3); and a clamping mechanism (6) and a resisting mechanism (7) are respectively installed on the top of the plurality of angle control mechanisms (4); the angle control mechanism (4) comprises a moving seat (401); the moving seat (401) is rotatably connected to the travel groove (3); and the contact orientation position of the clamping mechanism (6) and the resisting mechanism (7) with the engine hood to be welded is adjusted by the rotating moving seat (401); A welding slag guiding mechanism (5) is installed in the inner cavity of the travel groove (3), the welding slag guiding mechanism (5) is located on one side of the adjacent angle control mechanism (4), the welding slag guiding mechanism (5) comprises a suction head (519), the suction head (519) extends to one side of the clamping mechanism (6) at a corresponding position, and guides the welding flame through the welding slag guiding mechanism (5); The bottom of the movable seat (401) is connected to a control ring (404), one side of the outer wall of the control ring (404) is connected to a rotating block (405), one side of the rotating block (405) is rotatably connected to a rotating pair (406), and the side of the rotating pair (406) away from the rotating block (405) is rotatably connected to a connecting rod (407), the inner side of the travel groove (3) is provided with a slot for the connecting rod (407) to slide, one end of the connecting rod (407) away from the rotating pair (406) passes through the slot and is rotatably connected to a first rotating frame (408), one side of the first rotating frame (408) is connected to an electric push rod (409), one end of the electric push rod (409) away from the first rotating frame (408) is connected to a second rotating frame (410), and the second rotating frame (410) is rotatably connected to a fixed block (411), and the fixed block (411) is connected to the outer side of the travel groove (3); The top of the movable seat (401) is connected to a linear module (402), a slidable screw seat (403) is provided in the linear module (402), and the top of the screw seat (403) is connected to a clamping mechanism (6) or a control mechanism (7) at a corresponding position; The welding slag guiding mechanism (5) comprises a suction pipe (501), the bottom of the suction pipe (501) is connected to a slag collecting groove (503), the slag collecting groove (503) is connected to the travel groove (3), the top of the suction pipe (501) is connected to a guide pipe (508), a side of the guide pipe (508) away from the suction pipe (501) is rotatably connected to an adjustment pipe (514), and a front end of a side of the adjustment pipe (514) away from the guide pipe (508) is telescopically connected to a suction head (519), which extends to the bottom side of the weld through the suction head (519) to suck the welding flame.

2. The positioning device for welding an engine hood according to claim 1, characterized in that: The inner cavity of the slag collecting groove (503) is provided with a plurality of blocking blocks (505) and filter elements (504) arranged alternately in sequence along an arc direction; one side of the blocking block (505) is provided with two mutually inclined flame extinguishing grooves (507); an exhaust groove (506) is provided through the inner cavity of the flame extinguishing groove (507); and the exhaust groove (506) extends to one side of the filter element (504) at a corresponding position; and one side of the slag collecting groove (503) is connected to an external negative pressure suction device through a pipeline.

3. The positioning device for welding an engine hood according to claim 1, characterized in that: A support rod (502) is provided on one side of the suction pipe (501), and two ends of the support rod (502) are respectively connected to corresponding positions on one side of the guide pipe (508) and the slag collecting tank (503).

4. The positioning device for welding an engine hood according to claim 1, characterized in that: The top of the adjustment tube (514) is connected to a driven gear (509) through a shaft body passing through the guide tube (508); one side of the driven gear (509) is meshed with a limit tooth ring (510); one side of the limit tooth ring (510) is connected to a guide rod (511); a guide sleeve (512) is provided on the outer sleeve of the guide rod (511); a spring (513) is provided on the outer wall of the guide rod (511); two ends of the spring (513) are respectively connected to corresponding positions on one side of the guide sleeve (512) and the end of the guide rod (511); the movement of the adjustment tube (514) relative to the guide tube (508) is limited by the meshing of the limit tooth ring (510) and the driven gear (509).

5. The positioning device for welding an engine hood according to claim 4, characterized in that: The front end of the adjustment tube (514) away from the guide tube (508) is connected to an expansion frame (515), and the inner cavity of the expansion frame (515) is slidably connected to a connecting tube (516), one end of the connecting tube (516) passes through the expansion frame (515) and is connected to the suction head (519), and the other end of the connecting tube (516) is connected to the adjustment tube (514) via a telescopic tube (517).

6. The positioning device for welding an engine hood according to claim 1, characterized in that: The suction head (519) is externally sleeved with a clamping block (518), one side of the clamping block (518) being connected to a side of the unfolding frame (515) close to the suction head (519), and the suction head (519) is moved within the clamping block (518) to clamp and abut against the component to be processed.

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