A laser grinding device for fuel tank welds

Abstract

The present invention relates to the technical field of equipment processing, and specifically relates to a laser polishing device for oil tank welds. The polishing device includes a laser emitter, an adjustment mechanism, a side rust removal mechanism, and a bottom rust removal mechanism; the operator first places the laser emitter above the oil tank to polish the weld. After the polishing is completed, the laser emitter touches the adjustment mechanism, and the light path is refracted by the side rust removal mechanism to polish the side wall of the oil tank. After the side wall polishing is completed, the bottom is continuously polished through the bottom rust removal mechanism; the device has a simple structure, effectively realizes polishing of different positions of the oil tank through a simple mechanical structure, effectively reduces the investment in laser equipment, and at the same time avoids damage to other objects caused by bottom laser emission, has good practicability and economy, and is beneficial to the popularization and use of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment processing, and particularly relates to a laser grinding device for fuel tank welds. Background Art

[0002] Laser grinding mainly uses the heat collection performance of the laser to heat the metal surface and then grinds the fragments; during the process of processing the welds of the fuel tank, multiple sets of lasers are usually used to directly irradiate and grind the side walls, the top, and the bottom. However, due to the high price of the laser emitters, it is not conducive to the production of such devices. At the same time, the laser emitters directly irradiating the bottom are easily affected by the falling broken metal fragments, which are likely to block the optical path, cause scratches on the lens, and affect the implementation effect. If the optical path is refracted to change the light, due to the energy loss during the refraction process, the processing effect at the end will be greatly reduced. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a laser grinding device for fuel tank welds with a simple structure, low cost, which can effectively avoid the blockage of the optical path of the laser emitter by the broken metal fragments falling at the bottom of the fuel tank and effectively solve the energy loss of the laser treatment after refraction.

[0004] The technical solution adopted by the present invention is as follows: a laser grinding device for fuel tank welds, including a laser emitter, the laser emitter is located above the fuel tank, and the fuel tank is supported by a support;

[0005] An adjustment mechanism, the adjustment mechanism includes a lifting member and a side rust removal mechanism, the side rust removal mechanism is used to refract the light source of the laser emitter to the side of the fuel tank, and the lifting member is used to adjust the relative position of the side rust removal mechanism at the height of the bottom of the fuel tank;

[0006] The side rust removal mechanism includes a bending plate, the bending plate has an L-shaped structure, and an inclined first reflector is provided at the corner of the bending plate;

[0007] The side rust removal mechanism is further provided with a heating member, the heating member includes a light-transmitting cylinder, the light-transmitting cylinder is fixed to one end of the bending plate by a support column, a rotating sleeve is provided at the end of the light-transmitting cylinder away from the first reflector, an oblique guide rail is provided on the rotating sleeve, the rotating sleeve is sleeved on the light-transmitting cylinder, two sets of electrode plates are further provided at the end of the light-transmitting cylinder away from the first reflector, the two sets of electrode plates are symmetrically arranged, the gap between them is parallel to the emission optical path of the laser emitter, and a number of notch elastic rings are provided between the two sets of electrode plates, and a connecting rod is provided between the notch elastic ring and the rotating sleeve;

[0008] The heating element further includes a rotating structure, the rotating structure includes a contact rod, the contact rod penetrates and is slidably connected to the support column, and a contact ball is provided at one end of the contact rod close to the fuel tank. An active guide rod is provided in the middle of the contact rod. When the active guide rod moves translationally along the contact rod, one end of the active guide rod extends into the inclined guide rail, and a compression spring penetrated by the contact rod is provided between the support column and the active guide rod;

[0009] The bottom rust removal mechanism includes a second reflector, the reflecting surface of the second reflector faces the bottom of the fuel tank, an angle adjusting member is provided on the second reflector, and after the reflected light source of the side rust removal mechanism is directly irradiated to the second reflector, the direct irradiation position is adjusted to the bottom of the fuel tank by the angle adjusting member.

[0010] In one embodiment, the lifting member includes a main support plate, the main support plate is arranged on the side of the fuel tank, an activity groove is provided in the middle of the main support plate, a lifting block is further provided in the activity groove, a rotating threaded rod is further provided in the activity groove, the rotating threaded rod penetrates and is rotatably connected to the lifting block, a sliding block is provided at one end of the lifting block close to the fuel tank, an adjusting spring is provided between the sliding block and the lifting block, and the sliding block is connected to the side rust removal mechanism.

[0011] In one embodiment, a telescopic sliding rod is provided on the laser emitter, and the telescopic sliding rod penetrates and is slidably connected to one end of the main support plate.

[0012] In one embodiment, the sliding block is fixedly connected to the bent outer end of the bent plate, a diffusing mirror fixed to the bent plate is provided between the optical path emitted by the laser emitter and the first reflector, and a condenser lens is provided in the middle of the optical path refracted by the first reflector to the fuel tank stage. The condenser lens is fixedly connected to the lifting block by a fixed support frame.

[0013] In one embodiment, a filter lens is provided in the middle of the optical path reflected by the first reflector to the condenser lens, and the filter lens is fixedly connected to the bent plate.

[0014] In one embodiment, the light directly irradiated by the condenser lens passes through the inner cavity of the light-transmitting cylinder to the fuel tank.

[0015] In one embodiment, the bottom rust removal mechanism further includes a circumferential guide rail, the circumferential guide rail is arranged below the fuel tank away from the laser emitter, a connecting plate is provided on the outer periphery of the circumferential guide rail, a through groove is provided in the middle of the connecting plate, a power roller placed in the through groove is provided in the middle of the connecting plate, the power roller abuts against the circumferential guide rail, and the connecting plate is fixedly connected to the main support plate.

[0016] In one embodiment, the angle adjustment member includes two sets of bent connecting rods, the bent connecting rods have an L-shaped structure, one end of the bent connecting rod is hinged to the middle of the second reflector, the other end of the bent connecting rod is fixedly connected to the connecting plate, and abutting rollers are provided at both ends of the connecting plate. The two sets of abutting rollers clamp the circumferential guide rail.

[0017] In one embodiment, a movable rotating rod is provided in the middle of the two sets of bent connecting rods, and a movable lever is provided on the movable rotating rod. The movable lever has a C-shaped structure. One end of the movable lever abuts against one end of the second reflector away from the main support plate. A torsion spring penetrated by the movable rotating rod is provided between the adjacent ends of the movable lever and the movable rotating rod.

[0018] The beneficial effects of the present invention are as follows: As a laser polishing device for the fuel tank weld with simple structure, low cost, effectively avoiding the broken metal fragments at the bottom of the fuel tank from clogging the optical path of the laser emitter, and effectively solving the energy loss of the laser after refraction, the specific implementation manners are as follows:

[0019] After the operator first places the fuel tank above the circumferential guide rail, moves the laser emitter above the fuel tank, and starts the laser emitter to start polishing. After the polishing is completed on the surface of the fuel tank, when the moving telescopic sliding rod makes the emitting end of the laser emitter touch one end of the bending plate, the optical path of the laser emitter diverges through the diffusing mirror, and then continues to be refracted through the first reflector to the filter mirror. After the filter mirror filters out the stray light, it continues to be converged through the condenser lens. Further, it irradiates the surface of the fuel tank through the light-transmitting cylinder for polishing. At the same time, in order to ensure that the focused light is in the best position, when moving the laser emitter close to the main support plate, the laser emitter drives the sliding block to squeeze the adjusting spring to make the filter mirror away from the condenser lens, and fixes the position between the sliding block and the lifting block by means of bolts, etc., and adjusts the focal position of the condenser lens on the surface of the fuel tank contacted by the electrode plate to better adapt to different fuel tanks. Then rotate the rotating threaded rod to drive the lifting block to rise and fall, and the laser emitter can realize the polishing operation on different positions of the side wall of the fuel tank;

[0020] Since the energy decreases after the optical path diverges and is refracted and is not enough for the polishing operation, when the laser emitter polishes through the condenser lens, the electrode pieces on the electrode plate are connected to the circuit to form a loop with the fuel tank, and a resistance is formed between the two sets of electrode plates for heating, which can effectively assist in reducing the energy requirement;

[0021] Since the welds of different fuel tanks are different, start the power roller to drive the connecting plate to move along the outer side of the circumferential guide rail, further drive the laser emitter and the adjustment mechanism to move, and perform the polishing operation after reaching the specified position;

[0022] After the side wall is polished, the bottom of the fuel tank needs to be polished. Since the bottom weld is basically at the edge position, start the rotating threaded rod to drive the lifting block close to the circular guide rail. After that, the bending plate contacts one end of the movable tilting rod and presses down. The other end of the movable tilting rod drives the reflective surface of the second reflector to flip close to the condenser. The light source emitted by the condenser is refracted and guided to the weld of the fuel tank floor through the second reflector. At the same time, due to the descent of the electrode plate on the bending plate, the touch ball is separated from the resistance to the fuel tank, and the compression spring squeezes the movable guide rod to move in the direction of the electrode plate. During the movement of the movable guide rod, after the movable guide rod is passed into the inclined guide rail of the rotating sleeve, the rotating sleeve is driven to rotate and further drive the electrode plate on the notched elastic ring connected to the connecting rod to rotate. Until the electrode plate rotates to a horizontal level, the notched elastic ring drives the two sets of electrode plates to clamp the edge of the fuel tank for auxiliary heating, thereby completing the polishing of the bottom of the fuel tank.

[0023] The device has a simple structure and effectively utilizes the guiding effect of the optical path structure and energy compensation to achieve grinding processing at different positions of the tank weld. It has low cost, good practicality and economy, and is beneficial to the promotion and use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 is a second three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the side rust removal mechanism of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the side rust removal mechanism of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the side rust removal mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the side rust removal mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the side rust removal mechanism of the present invention;

[0032] Figure 8 It is a partial three-dimensional structural schematic diagram of the side rust removal mechanism of the present invention.

[0033] Description of the Drawings: 1. Laser emitter; 11. Telescopic sliding rod; 2. Adjusting mechanism; 21. Main support plate; 211. Movable slot; 212. Rotating threaded rod; 23. Lifting block; 231. Adjusting spring; 24. Sliding block; 3. Side rust removal mechanism; 31. First reflector; 32. Diffuser; 321. Filter lens; 33. Condensing lens; 331. Fixed support frame; 34. Bent plate; 341. Touching support rod; 35. Light-transmitting cylinder; 351. Support column; 36. Electrode plate; 361. Notch elastic ring; 362. Connecting rod; 37. Rotating sleeve; 371. Oblique guide rail; 38. Touching rod; 381. Touching ball; 382. Movable guide rod; 383. Compression spring; 4. Bottom rust removal mechanism; 41. Circumferential guide rail; 42. Connecting plate; 421. Through groove; 422. Abutting roller; 424. Power roller; 43. Second reflector; 44. Bent connecting rod; 45. Movable lever; 46. Movable rotating rod; 47. Torsion spring; 5. Fuel tank. Detailed Description of the Invention

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings below is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0036] The following is combined with Figure 1-8 to illustrate the specific implementation of the present invention. A laser grinding device for the weld of a fuel tank 5 includes a laser emitter 1. The laser emitter 1 is a prior art and mainly cleans the weld of the fuel tank 5 by emitting laser, so it will not be described in detail. The laser emitter 1 is located above the fuel tank 5, and the fuel tank 5 is supported by a support.

[0037] Adjusting mechanism 2, the adjusting mechanism 2 includes a lifting member and a side rust removal mechanism 3. The side rust removal mechanism 3 is used to refract the light source of the laser emitter 1 on the side of the fuel tank 5. The lifting member is used to adjust the relative position of the side rust removal mechanism 3 at the bottom height of the fuel tank 5. The lifting member includes a main support plate 21. The main support plate 21 is arranged on the side of the fuel tank 5. A movable groove 211 is provided in the middle of the main support plate 21. A lifting block 23 is also provided in the movable groove. A rotating threaded rod 212 is also provided in the movable groove 211. The rotating threaded rod 212 can rotate on its own axis. The rotating threaded rod 212 penetrates and is rotatably connected to the lifting block 23. One end of the lifting block 23 close to the fuel tank 5 is provided with a sliding block 24. An adjusting spring 231 is provided between the sliding block 24 and the lifting block 23. The sliding block 24 is connected to the side rust removal mechanism 3. Advantageously, the side rust removal mechanism 3 includes a bending plate 34. The bending plate 34 has an L-shaped structure. A touching support rod 341 is provided on the bending plate 34 to abut against the emitting end of the laser emitter 1, or directly abut against the bending plate 34, depending on the position or size of the emitting end of the laser emitter 1. The sliding block 24 is fixedly connected to the bent outer end of the bending plate 34. An inclined first reflector 31 is provided at the corner of the bending plate 34. The first reflector 31 mainly refracts the laser through the mirror surface with a special coating, which is prior art. A diffusing mirror 32 fixed to the bending plate 34 is provided between the optical path emitted by the laser emitter 1 and the first reflector 31. The diffusing mirror 32 is also prior art. Note that when the high-energy laser is emitted onto the first reflector 31, it is diffused to avoid burning the surface coating of the first reflector 31. A condenser lens 33 is provided in the middle of the optical path refracted by the first reflector 31 to the fuel tank 5 stage. The condenser lens 33 is similar to a concave lens and is used to assist in laser focusing, which is also prior art. The condenser lens 33 is fixedly connected to the lifting block 23 by a fixed support frame 331;

[0038] In implementation, after moving the telescopic sliding rod 11 to make the emitting end of the laser emitter 1 touch one end of the bending plate 34, the optical path of the laser emitter 1 is diffused by the diffusing mirror 32, and then continues to be refracted by the first reflector 31 to the filter mirror 321. After the filter mirror 321 filters out the stray light, it continues to be converged by the condenser lens 33, and further irradiates the surface of the fuel tank 5 through the light-transmitting cylinder 35 for polishing. At the same time, in order to ensure that the focused light is in the best position, when moving the laser emitter 1 close to the main support plate 21, the laser emitter 1 drives the sliding block 24 to squeeze the adjusting spring 231 to make the filter mirror 321 away from the condenser lens 33, and fix the position between the sliding block 24 and the lifting block 23 by bolts or other means, and adjust the focal position of the condenser lens 33 on the surface of the fuel tank 5 contacted by the electrode plate 36 to better adapt to different fuel tanks 5.

[0039] Advantageously, the laser emitter 1 is provided with a telescopic sliding rod 11. The telescopic sliding rod 11 penetrates and is slidably connected to one end of the main support plate 21. The laser emitter 1 can be translated on the top of the fuel tank 5 manually or automatically.

[0040] The bottom rust removal mechanism 4, the bottom rust removal mechanism 4 includes a second reflector 43, the reflecting surface of the second reflector 43 faces the bottom of the fuel tank 5, an angle adjusting member is provided on the second reflector 43, after the reflected light source of the side rust removal mechanism 3 is directly irradiated to the second reflector 43, the direct irradiation position is adjusted to the bottom of the fuel tank 5 by the angle adjusting member.

[0041] Advantageously, a filter lens 321 is provided in the middle of the reflecting light path of the first reflector 31 to the condenser lens 33. The filter lens 321 mainly filters the stray light refracted after being emitted to the first reflector 31 by the diffusing lens 32. Since it is a prior art, it will not be elaborated here. The filter lens 321 is fixedly connected to the bent plate 34.

[0042] Advantageously, a heating member is further provided on the side rust removal mechanism 3. The heating member includes a light-transmitting cylinder 35. The light directly irradiated by the condenser lens 33 passes through the inner cavity of the light-transmitting cylinder 35 to the fuel tank 5. The light-transmitting cylinder 35 is fixed to one end of the bent plate 34 by a support column 351. A rotating sleeve 37 is provided at one end of the light-transmitting cylinder 35 away from the first reflector 31. An inclined guide rail 371 is provided on the rotating sleeve 37. The rotating sleeve 37 is sleeved on the light-transmitting cylinder 35. Two groups of electrode plates 36 are further provided at one end of the light-transmitting cylinder 35 away from the first reflector 31. The two groups of electrode plates 36 are symmetrically arranged, and the gap between them is parallel to the emission light path of the laser emitter 1. A plurality of notched elastic rings 361 are provided between the two groups of electrode plates 36. When the electrode plates 36 are connected to the circuit, a loop is formed at the contact section with the fuel tank 5. A connecting rod 362 is provided between the notched elastic ring 361 and the rotating sleeve 37; the heating member further includes a rotating structure. The rotating structure includes a contact rod 38. The contact rod 38 penetrates and is slidably connected to the support column 351. A contact ball 381 is provided at one end of the contact rod 38 close to the fuel tank 5. An active guide rod 382 is provided in the middle of the contact rod 38. When the active guide rod 382 moves translationally with the contact rod 38, one end of the active guide rod 382 enters the inclined guide rail 371. A compression spring 383 penetrated by the contact rod 38 is provided between the support column 351 and the active guide rod 382.

[0043] Beneficially, the bottom rust removal mechanism 4 further includes a circumferential guide rail 41. The circumferential guide rail 41 is disposed below the fuel tank 5 away from the laser emitter 1. A connecting plate 42 is provided on the outer peripheral side of the circumferential guide rail 41. A through groove 421 is provided in the middle of the connecting plate 42. A power roller 424 placed in the through groove 421 is provided in the middle of the connecting plate 42. The power roller 424 abuts against the circumferential guide rail 41. The connecting plate 42 is fixedly connected to the main support plate 21. Further, the angle adjustment member includes two sets of bent connecting rods 44. The bent connecting rods 44 have an L-shaped structure. One end of the bent connecting rod 44 is hinged to the middle of the second reflector 43. The other end of the bent connecting rod 44 is fixedly connected to the connecting plate 42. Contact rollers 422 are provided at both ends of the connecting plate 42. The two sets of contact rollers 422 clamp the circumferential guide rail 41. An active rotating rod 46 is provided in the middle of the two sets of bent connecting rods 44. An active lever 45 is provided on the active rotating rod 46. The active lever 45 has a C-shaped structure. One end of the active lever 45 abuts against the end of the second reflector 43 away from the main support plate 21. A torsion spring 47 penetrated by the active rotating rod 46 is provided between the adjacent ends of the active lever 45 and the active rotating rod 46.

[0044] In implementation, when the electrode plate 36 on the bending plate 34 descends, the contact ball 381 disengages from the fuel tank 5. The compression spring 383 squeezes the movable guide rod 382 to move towards the electrode plate 36. During the movement of the movable guide rod 382, after the movable guide rod 382 enters the inclined guide rail 371 of the rotary sleeve 37, it drives the rotary sleeve 37 to rotate, and further drives the electrode plate 36 on the notch elastic ring 361 connected by the connecting rod 362 to rotate until the electrode plate 36 rotates to the horizontal position. Then, the notch elastic ring 361 drives the two sets of electrode plates 36 to clamp the edge of the fuel tank 5 for auxiliary heating.

[0045] The working principle of the present invention:

[0046] After the operator first places the fuel tank 5 above the circumferential guide rail 41, the laser emitter 1 is moved above the fuel tank 5, and the laser emitter 1 is started to start grinding. After the grinding is completed on the surface of the fuel tank 5, the telescopic sliding rod 11 is moved so that the emitting end of the laser emitter 1 touches one end of the bending plate 34. Then, the light path of the laser emitter 1 diverges through the diffusing mirror 32, and then continues to be refracted through the first reflector 31 to the filter lens 321. After the filter lens 321 filters out stray light, it continues to be converged through the condenser lens 33, and further irradiates the surface of the fuel tank 5 through the light-transmitting cylinder 35 for grinding. At the same time, in order to ensure that the focused light is in the best position, when the laser emitter 1 is moved closer to the main support plate 21, the laser emitter 1 drives the sliding block 24 to squeeze the adjusting spring 231 so that the filter lens 321 moves away from the condenser lens 33, and the positions of the sliding block 24 and the lifting block 23 are fixed by bolts and other means to adjust the focal point position of the condenser lens 33 on the surface of the fuel tank 5 contacted by the electrode plate 36, so as to better adapt to different fuel tanks 5. Then, the rotating threaded rod 212 is rotated to drive the lifting block 23 to rise and fall, and the laser emitter 1 can perform grinding operations on different positions of the side wall of the fuel tank 5;

[0047] Since the energy decreases after the light path is diverged and refracted and is not sufficient for grinding operations, when the laser emitter 1 performs grinding through the condenser lens 33, the electrode pieces on the electrode plate 36 are connected to the circuit to form a loop with the fuel tank 5, and a resistance is formed between the two groups of electrode plates 36 for heating, which can effectively assist in reducing the energy requirement;

[0048] Since the welds of different fuel tanks 5 are different, the driving power roller 424 is started to drive the connecting plate 42 to move along the outer side of the circumferential guide rail 41, further driving the laser emitter 1 and the adjusting mechanism 2 to move positions, and grinding operations can be performed after reaching the specified positions;

[0049] After the side wall is polished, the bottom of the fuel tank 5 needs to be polished. Since the bottom weld is basically at the edge position, the rotating threaded rod 212 is started to drive the lifting block 23 close to the circumferential guide rail 41. Then, the bending plate 34 contacts one end of the movable tilting rod 45 and presses down. The other end of the movable tilting rod 45 drives the reflecting surface of the second reflecting plate 43 to flip close to the condenser 33. The light source emitted by the condenser 33 is refracted through the second reflecting plate 43 and guided to the weld of the bottom plate of the fuel tank 5. At the same time, due to the descent of the electrode plate 36 on the bending plate 34, the touching ball 381 is disengaged. The movable guide rod 382 is away from the oil tank 5, and the compression spring 383 squeezes the movable guide rod 382 to move in the direction of the electrode plate 36. During the movement of the movable guide rod 382, ​​after the movable guide rod 382 is passed into the inclined guide rail 371 of the rotating sleeve 37, the rotating sleeve 37 is driven to rotate, which further drives the electrode plate 36 on the notched elastic ring 361 connected to the connecting rod 362 to rotate, until the electrode plate 36 rotates to a horizontal position, and the notched elastic ring 361 drives the two groups of electrode plates 36 to clamp the edge of the oil tank 5 for auxiliary heating, thereby completing the grinding process of the bottom of the oil tank 5.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in the technical field of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A laser polishing device for fuel tank welds, characterized in that: It includes a laser emitter (1) which is located above the fuel tank (5), and the fuel tank (5) is supported by a support; An adjustment mechanism (2), the adjustment mechanism (2) includes a lifting member and a side rust removal mechanism (3), the side rust removal mechanism (3) is used to refract the light source of the laser emitter (1) to the side of the fuel tank (5), and the lifting member is used to adjust the relative position of the side rust removal mechanism (3) at the height of the bottom of the fuel tank (5); The side rust removal mechanism (3) includes a bending plate (34), the bending plate (34) has an L-shaped structure, and a first reflector (31) is arranged obliquely at the corner of the bending plate (34); The side rust removal mechanism (3) is also provided with a heating member, the heating member includes a light-transmitting cylinder (35), the light-transmitting cylinder (35) is fixed to one end of the bending plate (34) by a support column (351), a rotating sleeve (37) is arranged at one end of the light-transmitting cylinder (35) far from the first reflector (31), an inclined guide rail (371) is arranged on the rotating sleeve (37), the rotating sleeve (37) is sleeved on the light-transmitting cylinder (35), two groups of electrode plates (36) are also arranged at one end of the light-transmitting cylinder (35) far from the first reflector (31), the two groups of electrode plates (36) are symmetrically arranged, the gap between them is parallel to the emission light path of the laser emitter (1), and a number of notched elastic rings (361) are arranged between the two groups of electrode plates (36), and a connecting rod (362) is arranged between the notched elastic ring (361) and the rotating sleeve (37); The heating member also includes a rotating structure, the rotating structure includes a touch rod (38), the touch rod (38) penetrates and is slidably connected to the support column (351), a touch ball (381) is arranged at one end of the touch rod (38) close to the fuel tank (5), a movable guide rod (382) is arranged in the middle of the touch rod (38), when the movable guide rod (382) moves horizontally with the touch rod (38), one end of the movable guide rod (382) enters the inclined guide rail (371), and a compression spring (383) penetrated by the touch rod (38) is arranged between the support column (351) and the movable guide rod (382); A bottom rust removal mechanism (4), the bottom rust removal mechanism (4) includes a second reflector (43), the reflecting surface of the second reflector (43) faces the bottom of the fuel tank (5), an angle adjustment member is arranged on the second reflector (43), after the reflected light source of the side rust removal mechanism (3) is directly irradiated to the second reflector (43), the direct irradiation position is adjusted to the bottom of the fuel tank (5) by the angle adjustment member.

2. The laser polishing device for the fuel tank weld according to claim 1, wherein: The lifting member includes a main support plate (21), the main support plate (21) is arranged on the side of the fuel tank (5), a movable groove (211) is provided in the middle of the main support plate (21), a lifting block (23) is further provided in the movable groove (211), a rotating threaded rod (212) is further provided in the movable groove (211), the rotating threaded rod (212) penetrates and is rotatably connected to the lifting block (23), a sliding block (24) is provided at one end of the lifting block (23) close to the fuel tank (5), an adjusting spring (231) is provided between the sliding block (24) and the lifting block (23), and the sliding block (24) is connected to the side rust removal mechanism (3).

3. The laser grinding device for the fuel tank weld according to claim 2, wherein: A telescopic sliding rod (11) is provided on the laser emitter (1), and the telescopic sliding rod (11) penetrates and is slidably connected to one end of the main support plate (21).

4. The laser polishing device for the fuel tank weld according to claim 2, wherein: The sliding block (24) is fixedly connected to the bent outer end of the bent plate (34), a diffusing lens (32) fixed to the bent plate (34) is provided between the optical path emitted by the laser emitter (1) and the first reflector (31), a condenser lens (33) is provided in the middle of the refracted optical path from the first reflector (31) to the fuel tank (5), and the condenser lens (33) is fixedly connected to the lifting block (23) by a fixed support frame (331).

5. The laser polishing device for the fuel tank weld according to claim 4, wherein: A filter lens (321) is provided in the middle of the optical path reflected by the first reflector (31) to the condenser lens (33), and the filter lens (321) is fixedly connected to the bent plate (34).

6. The laser grinding device for the weld of the fuel tank (5) according to claim 4, characterized in that: The light directly emitted by the condenser lens (33) passes through the inner cavity of the light-transmitting cylinder (35) to the fuel tank (5).

7. The laser polishing device for the fuel tank weld according to claim 2, wherein: The bottom rust removal mechanism (4) further includes a circumferential guide rail (41), the circumferential guide rail (41) is arranged below the fuel tank (5) far from the laser emitter (1), a connecting plate (42) is provided on the outer peripheral side of the circumferential guide rail (41), a through groove (421) is provided in the middle of the connecting plate (42), a power roller (424) placed in the through groove (421) is provided in the middle of the connecting plate (42), the power roller (424) abuts against the circumferential guide rail (41), and the connecting plate (42) is fixedly connected to the main support plate (21).

8. The laser polishing device for the fuel tank weld according to claim 7, characterized in that: The angle adjusting member includes two groups of bent connecting rods (44), the bent connecting rods (44) are in an L-shaped structure, one end of the bent connecting rod (44) is hinged to the middle of the second reflector (43), the other end of the bent connecting rod (44) is fixedly connected to the connecting plate (42), abutting rollers (422) are provided at both ends of the connecting plate (42), and the two groups of abutting rollers (422) clamp the circumferential guide rail (41).

9. The laser polishing device for the fuel tank weld according to claim 8, wherein: An active rotating rod (46) is provided in the middle of two groups of the bent connecting rods (44). An active lever (45) is provided on the active rotating rod (46). The active lever (45) presents a C-shaped structure. One end of the active lever (45) abuts against one end of the second reflector (43) away from the main support plate (21). A torsion spring (47) penetrated by the active rotating rod (46) is provided between the adjacent ends of the active lever (45) and the active rotating rod (46).

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