Automatic welding device for metal parts

Abstract

The invention discloses an automatic metal part welding device which comprises a first fixing frame, one side of the first fixing frame is fixedly connected with a second fixing frame, one side of the second fixing frame is fixedly connected with a third fixing frame, and the top of the first fixing frame is provided with a conveying mechanism. A first welding mechanism is fixedly connected to the top of the second fixing frame, a second welding mechanism is fixedly connected to the middle of the top end of the conveying mechanism, and a material receiving mechanism is arranged at the bottom end of the third fixing frame. A welding head is conveniently driven to be adjusted through a device shell at the bottom of a fixed top seat, and meanwhile, in order to facilitate welding, the welding head is driven to weld metal parts through rotation of a small electric motor.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding of metal parts, in particular to an automatic welding device for metal parts. Background Art

[0002] Metal parts refer to the collective name for metal blocks, metal bars, metal tubes, etc. of various specifications and shapes made of metal materials.

[0003] Among them, the "metal component laser welding equipment" disclosed in the application number "CN116944711A" is also an increasingly mature technology. Its "laser welding equipment includes a shell, the top of the shell is fixedly connected to a control box, the bottom inner wall of the shell is fixedly connected to a motor, and one end of the motor output shaft is fixedly connected to a gear, the rear inner wall of the shell is slidably connected to a contact plate, and the top of the contact plate extends outside the shell, the bottom inner wall of the shell is located on the right side of the motor and is fixedly connected to a hollow plate, and the bottom of the contact plate is fixedly connected to an internal hollow sliding plate. The present invention places the material on the top of the shell, and at this time controls the contact plate to move, thereby achieving the effect of controlling the fixed plate to move, and can effectively fix the material. At the same time, as the motor is started, the support plate can be assisted to descend through the rotation of the motor output shaft, thereby controlling the welding machine to descend, thereby achieving the effect of automatically welding the material.

[0004] However, the above-mentioned metal parts laser welding equipment design has the following disadvantages: the metal parts laser welding equipment welds the metal parts through the combination of a control box, a gear, a sliding plate, and a housing, and the position of the welding head cannot be adjusted through the above-mentioned welding mechanism. At the same time, the welded parts cannot be quickly unloaded, which causes the parts to pile up on the welding equipment and affects the welding processing of hardware parts.

[0005] Therefore, it is necessary to provide a metal parts automatic welding device to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an automatic welding device for metal parts to solve the problems raised by the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an automatic welding device for metal parts, comprising a first fixed frame, a second fixed frame is fixedly connected to one side of the first fixed frame, a third fixed frame is fixedly connected to one side of the second fixed frame, and a conveying mechanism is arranged on the top of the first fixed frame; The top of the second fixed frame is fixedly connected with a first welding mechanism, the middle of the top of the conveying mechanism is fixedly connected with a second welding mechanism, and the bottom end of the third fixed frame is provided with a material receiving mechanism.

[0008] Preferably, the conveying mechanism includes two conveying frames fixedly installed on the top of the first fixed frame, one side of each conveying frame is fixedly connected to a first driving motor, the driving end of the first driving motor is fixedly connected to a main roller, one end of the conveying frame is movably connected to a slave roller, the outer sides of the main roller and the slave roller are transmission-connected to a conveyor belt, a support seat is fixedly connected between the two sides of the conveying frame, the top of the support seat is fixedly connected to a first electric telescopic rod, and the telescopic end of the first electric telescopic rod is fixedly connected to a lifting snap-fit ​​seat.

[0009] Preferably, the first welding mechanism includes a first welding frame fixedly connected to the top of the first fixed frame, a sliding rail is fixedly connected to one side of the top of the first welding frame, a first fixed shell is fixedly connected to the other side of the first welding frame, one end of the first fixed shell is fixedly connected to the second drive motor, the transmission end of the second drive motor is fixedly connected to the first screw rod, the outer side thread of the first screw rod is slidably connected to the second fixed shell, one end of the second fixed shell is fixedly connected to the third drive motor, the transmission end of the third drive motor is fixedly connected to the second screw rod, the outer side thread of the second screw rod is connected to the moving seat, and one side of the moving seat is fixedly connected to the smoking device.

[0010] Preferably, a slide rail is provided on the top of the first welding frame, and a first servo motor is provided on the other side of the top of the first welding frame, a driving end of the first servo motor is fixedly connected to a first threaded rod, a movable slide is inserted through the external thread of the first threaded rod, one end of the movable slide is slidably connected to the slide rail, a second servo motor is fixedly connected to the top end of the movable slide, a second threaded rod is fixedly connected to the driving end of the second servo motor, an adjusting slide is threadedly connected to the outer side of the second threaded rod, a second electric telescopic rod is fixedly connected to one side of the adjusting slide, and a first laser welder is fixedly connected to the telescopic end of the second electric telescopic rod.

[0011] Preferably, the second welding mechanism includes a welding fixing frame fixedly connected to the top of the conveying frame, two symmetrical small electric telescopic rods are fixedly connected to the top of the welding fixing frame, the telescopic ends of the small electric telescopic rods are fixedly connected to a fixed top seat, the bottom end of the fixed top seat is fixedly connected to a device shell, the top of the device shell is fixedly connected to a small electric motor, and the transmission end of the small electric motor is fixedly connected to a welding head.

[0012] Preferably, the material receiving mechanism includes a material receiving frame fixedly connected to one side of the third fixed frame, two electric hydraulic cylinders are fixedly connected to one side of the material receiving frame, and a material receiving rack is fixedly connected to the top of each electric hydraulic cylinder, a small driving motor is fixedly connected to the inner side of the material receiving rack, a driving end of the small driving motor is fixedly connected to the main turntable, the outer side of the main turntable is connected to a slave turntable through a transmission belt transmission, one side of the slave turntable is fixedly connected to the main rotating shaft, the outer sides of both ends of the main rotating shaft are fixedly connected to the first turntable, one end of the material receiving frame is movably connected to the slave rotating shaft, the outer sides of both ends of the slave rotating shaft are fixedly connected to the second turntable, and the outer sides of the second turntable and the first turntable are transmission-connected with feeding belts.

[0013] Preferably, a switch panel is fixedly connected to one side of the first fixing frame, and a protective layer is provided on the surface of the switch panel.

[0014] Preferably, the surface of the switch panel is provided with a first drive motor control switch, a first electric telescopic rod control switch, a second drive motor control switch, a third drive motor control switch, a first servo motor control switch, a second servo motor control switch, a second electric telescopic rod control switch, a first laser welder control switch, a small electric telescopic rod control switch, a small electric motor control switch and a small drive motor control switch, and the first drive motor, the first electric telescopic rod, the second drive motor, the third drive motor, the first servo motor, the second servo motor, the second electric telescopic rod, the first laser welder, the small electric telescopic rod, the small electric motor and the small drive motor are electrically connected to an external power supply through the first drive motor control switch, the first electric telescopic rod control switch, the second drive motor control switch, the third drive motor control switch, the first servo motor control switch, the second servo motor control switch, the second electric telescopic rod control switch, the first laser welder control switch, the small electric telescopic rod control switch, the small electric motor control switch and the small drive motor control switch respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The first threaded rod is driven to rotate by the rotation of the first servo motor, so that the first threaded rod can drive the movable slide to move forward and backward during the rotation process, and the first laser welder can be driven to move and slide by the movement and adjustment of the movable slide. At the same time, the second threaded rod is driven to rotate by the rotation of the second servo motor to drive the adjustment slide to move horizontally and adjust the welding position. The first laser welder is driven to weld metal parts by the extension and retraction of the second electric telescopic rod.

[0016] 2. The small electric telescopic rod on the welding fixture is extended and retracted to facilitate pushing the fixed top seat so that the welding head is close to the metal parts. The device shell at the bottom of the fixed top seat is used to drive the welding head for adjustment. At the same time, in order to facilitate welding, the welding head is driven by the rotation of the small electric motor to weld the metal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic structural diagram of a first laser welder of the present invention; Figure 3 is a schematic diagram of the structure of a first servo motor of the present invention; Figure 4 It is a structural schematic diagram of the material receiving mechanism of the present invention; Figure 5 It is a schematic diagram of the main turntable structure of the present invention; Figure 6 It is a schematic diagram of the structure of the conveying mechanism of the present invention; Figure 7 It is a schematic structural diagram of the second welding mechanism of the present invention.

[0018] In the figure: 1, first fixed frame; 101, second fixed frame; 102, third fixed frame; 2, conveying mechanism; 201, conveying frame; 202, first driving motor; 203, main roller; 204, slave roller; 205, conveyor belt; 206, support seat; 207, first electric telescopic rod; 208, lifting and locking seat; 3. First welding mechanism; 301. First welding frame; 302. Sliding rail; 303. First fixed shell; 304. Second driving motor; 305. First screw rod; 306. Second fixed shell; 307. Third driving motor; 308. Second screw rod; 309. Moving seat; 3010. Smoking device; 3011. Sliding rail; 3012. First servo motor; 3013. First threaded rod; 3014. Moving slide seat; 3015. Second servo motor; 3016. Second threaded rod; 3017. Adjusting slide seat; 3018. Second electric telescopic rod; 3019. First laser welder; 4. The second welding mechanism; 401. The welding fixture; 402. The small electric telescopic rod; 403. The fixed top seat; 404. The device shell; 405. The small electric motor; 406. The welding head; 5. The material receiving mechanism; 501. The material receiving frame; 502. The electric hydraulic cylinder; 503. The material receiving frame; 504. The small driving motor; 505. The main turntable; 506. The slave turntable; 507. The main shaft; 508. The first turntable; 509. The slave shaft; 5010. The second turntable; 5011. The feeding belt. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] See also Figure 1-Figure 7 The present invention provides a technical solution: an automatic welding device for metal parts, comprising a first fixed frame 1, a second fixed frame 101 is fixedly connected to one side of the first fixed frame 1, a third fixed frame 102 is fixedly connected to one side of the second fixed frame 101, and a conveying mechanism 2 is arranged on the top of the first fixed frame 1; The top of the second fixed frame 101 is fixedly connected with the first welding mechanism 3 , the middle of the top of the conveying mechanism 2 is fixedly connected with the second welding mechanism 4 , and the bottom of the third fixed frame 102 is provided with a material receiving mechanism 5 .

[0024] The conveying mechanism 2 includes two conveying frames 201 fixedly installed on the top of the first fixed frame 1, one side of each conveying frame 201 is fixedly connected to a first driving motor 202, the driving end of the first driving motor 202 is fixedly connected to a main roller 203, one end of the conveying frame 201 is movably connected to a slave roller 204, the outer sides of the main roller 203 and the slave roller 204 are transmission-connected to a conveyor belt 205, a support seat 206 is fixedly connected between the two sides of the conveying frame 201, the top of the support seat 206 is fixedly connected to a first electric telescopic rod 207, and the telescopic end of the first electric telescopic rod 207 is fixedly connected to a lifting snap-fit ​​seat 208.

[0025] During specific use, when automatically welding metal parts, in order to facilitate the batch transportation and welding of metal parts in sequence, the metal parts are transported in batches through the conveying mechanism 2. First, the main roller 203 is driven to rotate by the rotation of the first drive motor 202, and the conveyor belt 205 is driven to rotate by the rotation of the main roller 203, so that the slave roller 204 rotates in coordination, thereby facilitating the transportation of metal parts. When transporting to the welding position, the lifting and locking seat 208 is lifted and adjusted by the extension and retraction of the first electric telescopic rod 207 on the top of the support seat 206, thereby facilitating the locking and fixing of the metal parts for welding.

[0026] The first welding mechanism 3 includes a first welding frame 301 fixedly connected to the top of the first fixed frame 1, a sliding rail 302 is fixedly connected to one side of the top of the first welding frame 301, and a first fixed shell 303 is fixedly connected to the other side of the first welding frame 301, one end of the first fixed shell 303 is fixedly connected to the second drive motor 304, the transmission end of the second drive motor 304 is fixedly connected to the first screw rod 305, the outer thread of the first screw rod 305 is slidably connected to the second fixed shell 306, one end of the second fixed shell 306 is fixedly connected to the third drive motor 307, the transmission end of the third drive motor 307 is fixedly connected to the second screw rod 308, the outer thread of the second screw rod 308 is connected to the moving seat 309, and one side of the moving seat 309 is fixedly connected to the smoking device 3010.

[0027] In specific use, during welding, in order to avoid smoke generated by excessive temperature during welding, the second driving motor 304 on the first welding frame 301 is rotated, thereby driving the first screw rod 305 to rotate, and the second fixed shell 306 is driven to move on the sliding rail 302 through the rotation of the first screw rod 305, and the second screw rod 308 is driven to rotate through the rotation of the third driving motor 307, so that the second screw rod 308 is rotated, so that the movable seat 309 is moved and adjusted during the rotation of the second screw rod 308, so as to drive the smoke extractor 3010 to suck out the smoke generated during welding; A slide rail 3011 is arranged on the top of the first welding frame 301, and a first servo motor 3012 is arranged on the other side of the top of the first welding frame 301, a driving end of the first servo motor 3012 is fixedly connected with a first threaded rod 3013, an external thread of the first threaded rod 3013 is inserted with a movable slide 3014, one end of the movable slide 3014 is slidably connected with the slide rail 3011, a top end of the movable slide 3014 is fixedly connected with a second servo motor 3015, a driving end of the second servo motor 3015 is fixedly connected with a second threaded rod 3016, an outer side thread of the second threaded rod 3016 is connected with an adjusting slide 3017, a side of the adjusting slide 3017 is fixedly connected with a second electric telescopic rod 3018, and a telescopic end of the second electric telescopic rod 3018 is fixedly connected with a first laser welder 3019.

[0028] During specific use, the rotation of the first servo motor 3012 drives the first threaded rod 3013 to rotate, so that the first threaded rod 3013 can drive the movable slide 3014 to move forward and backward during the rotation process. The movement and adjustment of the movable slide 3014 can drive the first laser welder 3019 to move and slide. At the same time, the rotation of the second servo motor 3015 can drive the second threaded rod 3016 to rotate and drive the adjustment slide 3017 to move horizontally to adjust the welding position. The extension and retraction of the second electric telescopic rod 3018 drives the first laser welder 3019 to weld metal parts.

[0029] The second welding mechanism 4 includes a welding fixing frame 401 fixedly connected to the top of the conveying frame 201, and two symmetrical small electric telescopic rods 402 are fixedly connected to the top of the welding fixing frame 401. The telescopic ends of the small electric telescopic rods 402 are fixedly connected to a fixed top seat 403, and the bottom end of the fixed top seat 403 is fixedly connected to a device shell 404. The top of the device shell 404 is fixedly connected to a small electric motor 405, and the transmission end of the small electric motor 405 is fixedly connected to a welding head 406.

[0030] During specific use, the small electric telescopic rod 402 on the welding fixing frame 401 is extended and retracted to facilitate pushing the fixed top seat 403, so that the welding head 406 is close to the metal parts, and the device shell 404 at the bottom of the fixed top seat 403 is used to facilitate driving the welding head 406 for adjustment. At the same time, in order to facilitate welding, the welding head 406 is driven by the rotation of the small electric motor 405 to weld the metal parts.

[0031] The material receiving mechanism 5 includes a material receiving frame 501 fixedly connected to one side of the third fixed frame 102, two electric hydraulic cylinders 502 are fixedly connected to one side of the material receiving frame 501, and a material receiving rack 503 is fixedly connected to the top of each electric hydraulic cylinder 502, and a small driving motor 504 is fixedly connected to the inner side of the material receiving rack 503, and the driving end of the small driving motor 504 is fixedly connected to the main turntable 505, and the outer side of the main turntable 505 is connected to the slave turntable 506 through a transmission belt transmission, and a main rotating shaft 507 is fixedly connected to one side of the slave turntable 506, and the first turntable 508 is fixedly connected to the outer sides of both ends of the main rotating shaft 507, and one end of the material receiving rack 503 is movably connected to the slave rotating shaft 509, and the second turntable 5010 is fixedly connected to the outer sides of both ends of the slave rotating shaft 509, and the second turntable 5010 and the outer sides of the first turntable 508 are transmission-connected with a feeding belt 5011.

[0032] During specific use, the electric hydraulic cylinder 502 is set to facilitate the up and down adjustment of the docking rack 503 for alternate replacement, so as to ensure the unloading of the welded metal parts. When unloading, the main turntable 505 is driven to rotate by the rotation of the small drive motor 504 on the docking frame 501, so that during the rotation of the main turntable 505, the slave turntable 506 is driven to rotate, so that the slave turntable 506 drives the main shaft 507 to rotate during the rotation, which facilitates the rotation of the feeding belt 5011 outside the main shaft 507, so as to facilitate the unloading of the welded metal parts.

[0033] A switch panel is fixedly connected to one side of the first fixing frame 1 , and a protective layer is provided on the surface of the switch panel.

[0034] The surface of the switch panel is provided with a first drive motor control switch, a first electric telescopic rod control switch, a second drive motor control switch, a third drive motor control switch, a first servo motor control switch, a second servo motor control switch, a second electric telescopic rod control switch, a first laser welder control switch, a small electric telescopic rod control switch, a small electric motor control switch and a small drive motor control switch. The first drive motor 202, the first electric telescopic rod 207, the second drive motor 304, the third drive motor 307, the first servo motor 3012, the second servo motor 3015, the second electric telescopic rod 3018, the first laser welder 3019, the small electric telescopic rod 402, the small electric motor 405 and the small drive motor 504 are electrically connected to the external power supply through the first drive motor control switch, the first electric telescopic rod control switch, the second drive motor control switch, the third drive motor control switch, the first servo motor control switch, the second servo motor control switch, the second electric telescopic rod control switch, the first laser welder control switch, the small electric telescopic rod control switch, the small electric motor control switch and the small drive motor control switch respectively.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic welding device for metal parts, comprising a first fixed frame (1), characterized in that: A second fixed frame (101) is fixedly connected to one side of the first fixed frame (1), a third fixed frame (102) is fixedly connected to one side of the second fixed frame (101), and a conveying mechanism (2) is provided on the top of the first fixed frame (1); The top of the second fixed frame (101) is fixedly connected to a first welding mechanism (3), the middle of the top of the conveying mechanism (2) is fixedly connected to a second welding mechanism (4), and the bottom of the third fixed frame (102) is provided with a material receiving mechanism (5).

2. The automatic welding device for metal parts according to claim 1, characterized in that: The conveying mechanism (2) comprises two conveying frames (201) fixedly mounted on the top of the first fixed frame (1); one side of each conveying frame (201) is fixedly connected to a first drive motor (202); a driving end of the first drive motor (202) is fixedly connected to a main roller (203); one end of the conveying frame (201) is movably connected to a slave roller (204); outer sides of the main roller (203) and the slave roller (204) are drivingly connected to a conveyor belt (205); a support seat (206) is fixedly connected between the two sides of the conveying frame (201); a first electric telescopic rod (207) is fixedly connected to the top of the support seat (206); and a lifting engaging seat (208) is fixedly connected to the telescopic end of the first electric telescopic rod (207).

3. The automatic welding device for metal parts according to claim 2, characterized in that: The first welding mechanism (3) comprises a first welding frame (301) fixedly connected to the top of the first fixed frame (1); a sliding rail (302) is fixedly connected to one side of the top of the first welding frame (301); a first fixed shell (303) is fixedly connected to the other side of the first welding frame (301); one end of the first fixed shell (303) is fixedly connected to a second drive motor (304); a driving end of the second drive motor (304) is fixedly connected to a first screw rod (305); an outer side of the first screw rod (305) is slidably connected to a second fixed shell (306); one end of the second fixed shell (306) is fixedly connected to a third drive motor (307); a driving end of the third drive motor (307) is fixedly connected to a second screw rod (308); an outer side of the second screw rod (308) is threadedly connected to a moving seat (309); and one side of the moving seat (309) is fixedly connected to a smoking device (3010).

4. The automatic welding device for metal parts according to claim 3 is characterized in that: A slide rail (3011) is arranged at the top of the first welding frame (301), a first servo motor (3012) is arranged at the other side of the top of the first welding frame (301), a driving end of the first servo motor (3012) is fixedly connected to a first threaded rod (3013), a movable slide seat (3014) is inserted through the external thread of the first threaded rod (3013), one end of the movable slide seat (3014) is slidably connected to the slide rail (3011), a second servo motor (3015) is fixedly connected to the top end of the movable slide seat (3014), a second threaded rod (3016) is fixedly connected to the driving end of the second servo motor (3015), an adjusting slide seat (3017) is threadedly connected to the outer side of the second threaded rod (3016), a second electric telescopic rod (3018) is fixedly connected to one side of the adjusting slide seat (3017), and a first laser welder (3019) is fixedly connected to the telescopic end of the second electric telescopic rod (3018).

5. The automatic welding device for metal parts according to claim 4, characterized in that: The second welding mechanism (4) comprises a welding fixing frame (401) fixedly connected to the top of the conveying frame (201); two symmetrical small electric telescopic rods (402) are fixedly connected to the top of the welding fixing frame (401); the telescopic ends of the small electric telescopic rods (402) are fixedly connected to a fixed top seat (403); the bottom end of the fixed top seat (403) is fixedly connected to a device shell (404); the top of the device shell (404) is fixedly connected to a small electric motor (405); and the transmission end of the small electric motor (405) is fixedly connected to a welding head (406).

6. The automatic welding device for metal parts according to claim 5, characterized in that: The material receiving mechanism (5) comprises a material receiving frame (501) fixedly connected to one side of the third fixed frame (102); two electric hydraulic cylinders (502) are fixedly connected to one side of the material receiving frame (501); a material receiving frame (503) is fixedly connected to the top of each electric hydraulic cylinder (502); a small drive motor (504) is fixedly connected to the inner side of the material receiving frame (503); a main rotating disk (505) is fixedly connected to the driving end of the small drive motor (504); and an outer side of the main rotating disk (505) is fixedly connected to the driving end of the small drive motor (504). A slave turntable (506) is connected to the receiving frame (503) through a transmission belt, a main rotating shaft (507) is fixedly connected to one side of the slave turntable (506), a first turntable (508) is fixedly connected to the outer sides of both ends of the main rotating shaft (507), a slave turntable (509) is movably connected to one end of the receiving frame (503), a second turntable (5010) is fixedly connected to the outer sides of both ends of the slave rotating shaft (509), and a feeding belt (5011) is transmission-connected to the outer sides of the second turntable (5010) and the first turntable (508).

7. The automatic welding device for metal parts according to claim 6, characterized in that: A switch panel is fixedly connected to one side of the first fixing frame (1), and a protective layer is provided on the surface of the switch panel.

8. The automatic welding device for metal parts according to claim 7, characterized in that: The surface of the switch panel is provided with a first drive motor control switch, a first electric telescopic rod control switch, a second drive motor control switch, a third drive motor control switch, a first servo motor control switch, a second servo motor control switch, a second electric telescopic rod control switch, a first laser welder control switch, a small electric telescopic rod control switch, a small electric motor control switch and a small drive motor control switch, wherein the first drive motor (202), the first electric telescopic rod (207), the second drive motor (304), the third drive motor (307), the first servo motor (3012), the second servo motor (3015), the second electric telescopic rod (3018), the first laser welder (3019), the small electric telescopic rod (402), the small electric motor (405) and the small drive motor (504) are electrically connected to an external power supply via the first drive motor control switch, the first electric telescopic rod control switch, the second drive motor control switch, the third drive motor control switch, the first servo motor control switch, the second servo motor control switch, the second electric telescopic rod control switch, the first laser welder control switch, the small electric telescopic rod control switch, the small electric motor control switch and the small drive motor control switch, respectively.

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