PLC-based reinforcing rib automatic feeding mechanism for lamp tube welding

Abstract

The invention relates to the technical field of reinforcing rib welding feeding equipment, and discloses a PLC-based reinforcing rib automatic feeding mechanism for lamp tube welding, which comprises two bases, and each base is provided with a sliding piece and an X-axis driving assembly for driving the sliding piece to move; by arranging the X-axis driving assembly, the Y-axis driving assembly and the lifting assembly, the lifting plate for stacking the reinforcing ribs can be lifted to a proper height to achieve preliminary feeding, by arranging the limiting assembly, the reinforcing ribs in the stacked state are limited in the process that the reinforcing ribs are pushed on the surface of the lifting plate, and the safety of the reinforcing ribs is improved. The limiting assembly can be driven to slide downwards by arranging the adjusting assembly, and the height of the limiting assembly is the same as the thickness of one reinforcing rib in one welding period, so that the reinforcing rib on the uppermost layer can be pushed out from the interior of the limiting assembly, and the stability of the reinforcing rib on the lower layer cannot be affected.

Description

Technical Field

[0001] This invention relates to the field of reinforcing rib welding and feeding equipment, and in particular to an automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC. Background Technology

[0002] In the field of lighting equipment manufacturing, the structural strength of lamp tubes directly affects their service life and safety. Traditional lamp tubes are prone to deformation or even breakage when subjected to mechanical stress or thermal expansion and contraction due to their thin walls. To solve this problem, welding reinforcing ribs has become a key process. The reinforcing ribs are usually made of metal or high-strength alloy materials and are fixed to the outer or inner wall of the lamp tube through precision welding technology to form a rigid support structure.

[0003] In lamp tube reinforcement design, a single reinforcing rib often cannot meet the multi-directional stress bearing requirements, so multiple reinforcing ribs need to be welded to form a ring support structure. Ring welding requires the reinforcing ribs to be evenly distributed along the circumference of the lamp tube and to achieve a seamless connection through continuous or pulse welding processes. This process faces two major technical challenges: first, the precise control of the welding trajectory, which requires ensuring that the reinforcing ribs are perpendicular to the lamp tube axis and have consistent spacing; second, thermal deformation management, as the accumulated heat generated by ring welding may cause local deformation of the lamp tube.

[0004] Patent document CN213737501U discloses a copper tube triaxial feeding machine, which includes a main body, a triaxial linear module, an adsorption component, a material box, and a transfer mechanism. The adsorption component is connected to the triaxial linear module, and the triaxial linear module can drive the adsorption component. The material box is used to load copper tubes. The adsorption component can adsorb and remove the copper tubes from the material box. The transfer mechanism includes a transfer drive component and an inner support rod. After the copper tube is removed from the material box, the transfer drive component drives the inner support rod to insert into the copper tube from one end. After the adsorption component disengages from the copper tube, the inner support rod supports the copper tube, and the transfer drive component drives the inner support rod to feed the copper tube. This utility model's copper tube triaxial feeding machine supports the copper tube by inserting the inner support rod into the copper tube from one end, avoiding circumferential contact with the copper tube and preventing interference with processing equipment. It can efficiently complete the copper tube feeding operation and improve feeding efficiency.

[0005] In existing technologies, most feeding mechanisms adopt a three-axis (X, Y, Z axis) feeding mode. Similarly, this feeding method is generally used in the welding of lamp tube reinforcing ribs. However, the above-mentioned mechanism can only feed the material to the corresponding position. In the specific assembly process, a transfer component and an adsorption component must be used separately to adsorb and hold the individual material. This feeding method increases the operating cost of the device. Secondly, if the reinforcing ribs are stacked on top of the conveyor that carries the material and there is no specific limiting mechanism to limit them, the stacked material will shift, move or scatter during the feeding process, which will affect the stability of subsequent feeding and welding. Summary of the Invention

[0006] Purpose of the invention: The purpose of this invention is to provide an automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC, so as to solve the above-mentioned shortcomings in the prior art.

[0007] Technical Solution: A PLC-based automatic feeding mechanism for reinforcing ribs used in lamp welding includes two bases. Each base is equipped with a sliding component and an X-axis drive assembly for moving the sliding component. A lifting cage and a lifting assembly for driving the lifting cage to move are located at the top of the sliding component. A lifting plate for connecting the reinforcing ribs is located inside the lifting cage. Lifting components are fixedly installed on both sides of the lifting plate. Third motors are fixedly installed on both sides of the bottom of the lifting cage. The output ends of the two third motors are connected to third screws. The two lifting components are threadedly connected to the third screws. A frame is fixedly installed at the top of the lifting cage. A pushing assembly is provided on the frame. The pushing assembly includes a Y-axis drive assembly and a wedge plate. The wedge plate contacts the inclined surface of the reinforcing rib. A limit assembly and an adjustment assembly for driving the limit assembly to move are provided on the lifting plate.

[0008] As a further description of the above technical solution: the X-axis drive assembly includes a first motor rotatably installed inside the base and a first screw drively connected to the output end of the first motor. A sliding block is slidably installed inside the base. The sliding block is threadedly connected to the first screw. Two sliding grooves are opened at the top of the base. The sliding component and the sliding block are fixedly connected by a connecting strip. The connecting strip is disposed inside the sliding groove.

[0009] As a further description of the above technical solution: the lifting assembly includes a second motor fixedly installed on the top of two sliding parts, the output end of the second motor is drivenly connected to a second screw, the two second screws pass through both sides of the lifting cage, and two slide rods are fixedly installed on the top of the two sliding parts respectively, and the four slide rods are slidably connected to the four corners of the lifting cage respectively.

[0010] As a further description of the above technical solution: the Y-axis drive assembly includes a fourth motor fixedly mounted on the frame, the output end of the fourth motor is drivenly connected to a fourth screw, a slider is threadedly mounted on the fourth screw, an electric push rod is fixedly mounted on the slider through a connector, the output end of the electric push rod is drivenly connected to a fixing member, and the fixing member is fixedly connected to a wedge plate.

[0011] As a further description of the above technical solution: the limiting component includes a first through groove and a second through groove formed on the lifting plate. A first limiting block is slidably installed inside the first through groove, and a second limiting block is slidably installed inside the second through groove. In addition to being able to slide up and down along the first through groove and the second through groove, the first limiting block and the second limiting block can also slide in the horizontal direction. The first limiting block is engaged with one of the acute angle ends of the reinforcing rib, and the second limiting block is engaged with the other acute angle end of the reinforcing rib.

[0012] As a further description of the above technical solution: the limiting component also includes a connecting plate fixedly installed between the first limiting block and the second limiting block, and the connecting plate is disposed below the lifting plate.

[0013] As a further description of the above technical solution: the adjustment component includes a first toothed roller and a second toothed roller, and a rotating shaft is fixedly installed on the first toothed roller and the second toothed roller. The rotating shafts inside the first toothed roller and the second toothed roller are respectively rotatably installed at the bottom end of the lifting plate through the support plate and respectively set on one side of the first limiting block and the second limiting block. A first toothed groove is opened on the contact surface between the first limiting block and the first toothed roller, and a second toothed groove is opened on the contact surface between the second limiting block and the second toothed roller. The first toothed roller and the second toothed roller respectively mesh with the first toothed groove and the second toothed groove.

[0014] As a further description of the above technical solution: the adjustment assembly also includes a fifth motor fixedly mounted on one of the support plates, and the output end of the fifth motor is connected to one of the rotating shafts.

[0015] As a further description of the above technical solution: a transmission belt assembly is provided between the two rotating shafts, the transmission belt assembly including sprockets fixedly mounted on the two rotating shafts, and the two sprockets are connected by a chain drive.

[0016] As a further description of the above technical solution: a laser rangefinder is provided on one side of the lifting cage, and a grating sensor is provided directly below the lamp tube. The laser rangefinder and the grating sensor are electrically connected to the first motor, the second motor, the third motor, the fourth motor, the fifth motor and the electric push rod through the PLC system respectively.

[0017] Beneficial effects:

[0018] 1. The X-axis drive assembly, Y-axis drive assembly, and lifting assembly are set up to raise and lower the lifting plate with stacked reinforcing ribs to a suitable height to achieve initial material loading.

[0019] 2. A limiting component is set up to limit the stacked reinforcing ribs during the process of pushing the reinforcing ribs on the surface of the lifting plate, so as to prevent them from sliding and falling off.

[0020] 3. By setting the adjustment component, the limiting component can be driven to slide downwards, and within one welding cycle, it can be lowered to a height equal to the thickness of a reinforcing rib, so that the uppermost reinforcing rib can be pushed out from inside the limiting component without affecting the stability of the reinforcing ribs below.

[0021] 4. By setting up a laser rangefinder and a grating sensor, it can obtain the spatial information of the lamp tube through existing technologies and other means. Subsequently, based on the collected data, it controls multiple motors, electric push rods and rotating clamping mechanisms to realize the feeding operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure during the welding and feeding process of the present invention;

[0023] Figure 2 For the present invention Figure 1 A magnified structural diagram at point A;

[0024] Figure 3 This is a top view of the structure of the present invention;

[0025] Figure 4 This is a side view of the structure of the present invention;

[0026] Figure 5 This is a cross-sectional structural diagram of the X-axis drive assembly of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 7 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0029] Figure 8 This is a three-dimensional structural schematic diagram of the lifting assembly and the Y-axis drive assembly of the present invention;

[0030] Figure 9 This is a three-dimensional structural schematic diagram of the limiting component of the present invention;

[0031] Figure 10 For the present invention Figure 9 A three-dimensional structural diagram from a bottom view;

[0032] Figure 11 For the present invention Figure 9 A schematic diagram of the structure viewed from below;

[0033] Figure 12 This is a three-dimensional structural diagram of the first toothed roller, the second toothed roller, the first limiting block, and the second limiting block of the present invention.

[0034] Legend:

[0035] 1. Rotary clamping mechanism; 2. Lamp tube; 3. Reinforcing rib; 4. Base; 5. Grating sensor; 6. Sliding component; 7. Slide groove; 8. First motor; 9. First screw; 10. Sliding block; 11. Connecting bar; 12. Second motor; 13. Slide rod; 14. Lifting cage; 16. Second screw; 17. Third motor; 18. Third screw; 19. Lifting plate; 21. Frame; 22. Fourth screw; 23. Slider; 24. Electric push rod; 26. Fourth motor; 27. Laser rangefinder; 28. Fixing component; 29. ​​Wedge plate; 30. First through groove; 31. Second through groove; 32. First limiting block; 33. Second limiting block; 34. Connecting plate; 35. First toothed groove; 36. Second toothed groove; 37. Support plate; 38. Rotating shaft; 39. First toothed roller; 40. Second toothed roller; 41. Fifth motor; 42. Transmission belt assembly. Detailed Implementation

[0036] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-12The PLC-based automatic feeding mechanism for welding reinforcing ribs 3 for lamp tubes 2 includes two bases 4. Each base 4 is equipped with a sliding member 6 and an X-axis drive assembly for moving the sliding member 6. A lifting cage 14 and a lifting assembly for driving the lifting cage 14 are located at the top of the sliding member 6. A lifting plate 19 for connecting the reinforcing rib 3 is located inside the lifting cage 14. Lifting components are fixedly installed on both sides of the lifting plate 19. Third motors 17 are fixedly installed on both sides of the bottom of the lifting cage 14. The output ends of the two third motors 17 are connected to third screws 18. The two lifting components are threadedly connected to the third screws 18. A frame 21 is fixedly installed at the top of the lifting cage 14. A pushing assembly is provided on the frame 21. The pushing assembly includes a Y-axis drive assembly and a wedge plate 29. The wedge plate 29 contacts the inclined surface of the reinforcing rib 3. The lifting plate 19 is equipped with a limit component and an adjustment component for driving the limit component to rise and fall. The first motor 8 causes the sliding member 6 to slide the entire device on the base 4, realizing the translation of the device in the Y-axis direction. Then, the lifting component is driven, the lifting cage 14 is raised to the corresponding height, and the third motor 17 is driven to push the lifting plate 19 with multiple reinforcing ribs 3 stacked on it upward, thus realizing the translation in the Z-axis direction. Finally, the third motor 17 is driven to push the wedge plate 29 to realize the translation in the X-axis direction. During the translation, the limit component can effectively limit the stacked reinforcing ribs 3. When the reinforcing rib 3 to be welded is at the welding position of the lamp tube 2, the limit component is adjusted by the adjustment component to slide the limit component downward, thereby exposing the uppermost reinforcing rib 3. Then, the electric push rod 24 of the driving component can push the reinforcing rib 3 to the position to be welded.

[0038] As a preferred embodiment, the X-axis drive assembly includes a first motor 8 rotatably mounted inside the base 4 and a first screw 9 driven through the output end of the first motor 8. A sliding block 10 is slidably mounted inside the base 4, and the sliding block 10 is threadedly connected to the first screw 9. Two grooves 7 are formed at the top of the base 4. The sliding member 6 and the sliding block 10 are fixedly connected by a connecting strip 11, which is disposed inside the grooves 7. The first motor 8 can drive the first screw 9 to rotate, and the rotation of the first screw 9 can drive the sliding block 10 inside the base 4 to move. The sliding block 10 can drive the sliding member 6 to move through the connecting strip 11, thereby enabling the device to move along the Y-axis on the base 4.

[0039] As a preferred embodiment, the lifting assembly includes a second motor 12 fixedly installed on the top of two sliding members 6. The output end of the second motor 12 is connected to a second screw 16. The two second screws 16 pass through both sides of the lifting cage 14. The top ends of the two sliding members 6 are respectively fixedly installed with two slide rods 13. The four slide rods 13 are slidably connected to the four corners of the lifting cage 14. The second screws 16 can be driven to rotate by the second motor 12, and the lifting cage 14 can be raised and lowered along the Z-axis direction under the guiding and limiting action of the four slide rods 13.

[0040] As a preferred embodiment, the Y-axis drive assembly includes a fourth motor 26 fixedly mounted on the frame 21. The output end of the fourth motor 26 is driven by a fourth screw 22. A slider 23 is threaded onto the fourth screw 22. An electric push rod 24 is fixedly mounted on the slider 23 via a connector. The output end of the electric push rod 24 is driven by a fixing member 28. The fixing member 28 is fixedly connected to a wedge plate 29. When the fourth motor 26 of the Y-axis drive assembly drives the fourth screw 22 to rotate, the wedge plate 29 can move the stacked reinforcing ribs 3 in the X-axis direction. Under the action of the limiting assembly, the movement of the stacked reinforcing ribs 3 can be guided and limited, effectively preventing the stacked reinforcing ribs 3 from shifting or falling off. The electric push rod 24 can push the fixing member 28 and the wedge plate 29 to push the reinforcing ribs 3 out along the Y direction and move them to the position on the lamp tube 2 where welding is required.

[0041] As a preferred embodiment, the limiting component includes a first through groove 30 and a second through groove 31 formed on the lifting plate 19. A first limiting block 32 is slidably installed inside the first through groove 30, and a second limiting block 33 is slidably installed inside the second through groove 31. The first limiting block 32 and the second limiting block 33 can slide up and down along the first through groove 30 and the second through groove 31, and can also slide horizontally. The first limiting block 32 is engaged with one of the acute angle ends of the reinforcing rib 3, and the second limiting block 33 is engaged with the other acute angle end of the reinforcing rib 3. The first limiting block 32 and the second limiting block 33 can limit the stacked reinforcing ribs 3 from both sides of the X-axis and Y-axis, respectively, thereby preventing the reinforcing ribs 3 from scattering or shifting when the wedge plate 29 pushes the stacked reinforcing ribs 3, and increasing the stability of the reinforcing ribs 3 during movement.

[0042] As a preferred technical solution of this embodiment, the limiting component further includes a connecting plate 34 fixedly installed between the first limiting block 32 and the second limiting block 33, and the connecting plate 34 is disposed below the lifting plate 19; the first limiting block 32 and the second limiting block 33 are connected through the connecting plate 34 below.

[0043] As a preferred embodiment, the adjustment assembly includes a first toothed roller 39 and a second toothed roller 40. A rotating shaft 38 is fixedly installed on the first toothed roller 39 and the second toothed roller 40. The rotating shaft 38 inside the first toothed roller 39 and the second toothed roller 40 is rotatably installed at the bottom end of the lifting plate 19 through a support plate 37 and is respectively set on one side of the first limiting block 32 and the second limiting block 33. A first toothed groove 35 is opened on the contact surface between the first limiting block 32 and the first toothed roller 39, and a second toothed groove 36 is opened on the contact surface between the second limiting block 33 and the second toothed roller 40. The first toothed roller 39 and the second toothed roller 40 mesh with the first toothed groove 35 and the second toothed groove 36 respectively. By rotating the first toothed roller 39 and the second toothed roller 40, the first limiting block 32 and the second limiting block 33 can be driven to slide downward, thereby exposing the top reinforcing rib 3, which is convenient for subsequent pushing and feeding.

[0044] As a preferred technical solution of this embodiment, the adjustment component further includes a fifth motor 41 fixedly installed on one of the support plates 37, and the output end of the fifth motor 41 is connected to one of the rotating shafts 38 for transmission; the fifth motor 41 can drive the rotating shaft 38 to rotate, thereby controlling the rotation of the toothed rollers arranged on the rotating shaft 38.

[0045] As a preferred technical solution of this embodiment, a transmission belt assembly 42 is provided between the two rotating shafts 38. The transmission belt assembly 42 includes sprockets fixedly installed on the two rotating shafts 38, and the two sprockets are connected by a chain drive. Under the action of the transmission belt assembly 42, the two rotating shafts 38 can be driven to rotate simultaneously, further realizing the rotation of the first toothed roller 39 and the second toothed roller 40.

[0046] As a preferred technical solution in this embodiment, a laser rangefinder 27 is provided on one side of the lifting cage 14, and a grating sensor 5 is provided directly below the lamp tube 2. The laser rangefinder 27 and the grating sensor 5 are electrically connected to the first motor 8, the second motor 12, the third motor 17, the fourth motor 26, the fifth motor 41, and the electric push rod 24 through a PLC system, respectively. Based on the outer diameter information of the lamp tube 2 measured by the grating sensor 5 and the distance calculated by the laser rangefinder 27, an algorithm is used to combine the outer diameter information of the lamp tube 2 and the distance from the lamp tube 2 to the sensor to fit the shape of the lamp tube 2 and determine the shape and spatial position of the lamp tube 2. This technology is prior art and will not be described in detail. Subsequently, based on the collected data, the electric push rod 24 and multiple motors are controlled to move the reinforcing rib 3 to the position where it needs to be welded, so that the reinforcing rib 3 can be welded to the lamp tube 2.

[0047] It is worth mentioning that the lamp tube 2 is clamped by the rotating clamping mechanism 1 at both ends. If it is preset to weld n reinforcing ribs 3, after the welding of the reinforcing rib 3 at one position is completed, the lamp tube 2 is rotated 360 / n degrees by the rotating clamping mechanism 1 to complete the welding of the reinforcing rib 3 again. This process is repeated n times to complete the welding of all the reinforcing ribs 3 of the lamp tube 2.

[0048] Working principle: The lamp tube 2 is clamped and fixed by the rotating clamping mechanism 1 at the end. Then, based on the information such as the length and outer diameter of the lamp tube 2 detected by the laser rangefinder 27 and the grating sensor 5, the PLC control system operates each motor and electric push rod 24. The first motor 8 drives the sliding member 6 to move, that is, to realize the movement of the device in the Y-axis. The second motor 12 drives the lifting cage 14 to rise and fall, aligning the top of the lifting cage 14 with the position where the lamp tube 2 needs to be welded, realizing the movement in the Z-axis. Then, the third motor 17 drives the lifting plate 19 to rise and fall, raising and falling the lifting plate 19 with multiple reinforcing ribs 3 to the appropriate position. Then, the fourth motor 26 is driven to move. The end of the electric push rod 24 mounted on the slider 23 of the fourth motor 26 is provided with a wedge plate 29, which contacts the inclined surface of the reinforcing rib 3. Then, as the wedge plate 29 moves in the X-axis direction, the two acute-angled ends of the stacked reinforcing ribs 3 are respectively limited by the first limiting block 32 and the second limiting block 33. Therefore, multiple reinforcing ribs 3 can drive the first limiting block 32 and the second limiting block 33 to move. The first limiting block 32 and the second limiting block 33 can slide along the first toothed roller 39 and the second toothed roller 40 respectively without affecting their normal meshing. By rotating the fifth motor 41, combined with the transmission of the transmission belt assembly 42, the first toothed roller 39 and the second toothed roller 40 can be driven to rotate, so that the first limiting block 32 and the second limiting block 33 can be reduced by the thickness of one limiting block, the uppermost limiting block can be released, and then the electric push rod 24 is driven to push the reinforcing rib 3, so that the reinforcing rib 3 can move to the position on the lamp tube 2 that needs to be welded, thereby realizing the feeding.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A PLC-based automatic feeding mechanism for reinforcing ribs used in lamp welding, comprising two bases (4), each of the two bases (4) being provided with a sliding member (6) and an X-axis drive assembly for driving the sliding member (6) to move, characterized in that, The top of the sliding member (6) is provided with a lifting cage (14) and a lifting assembly for driving the lifting cage (14) to rise and fall. The interior of the lifting cage (14) is provided with a lifting plate (19) for connecting the reinforcing rib (3). Lifting components are fixedly installed on both sides of the lifting plate (19). A third motor (17) is fixedly installed on both sides of the bottom end of the lifting cage (14). The output ends of the two third motors (17) are connected to a third screw (18). The two lifting components are threadedly connected to the third screw (18). The top of the lifting cage (14) is fixedly installed with a frame (21). A pushing assembly is provided on the frame (21). The pushing assembly includes a Y-axis driving assembly and a wedge plate (29). The wedge plate (29) contacts the inclined surface of the reinforcing rib (3). A limit assembly and an adjustment assembly for driving the limit assembly to rise and fall are provided on the lifting plate (19).

2. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The X-axis drive assembly includes a first motor (8) rotatably mounted inside the base (4) and a first screw (9) drivenly connected to the output end of the first motor (8). A sliding block (10) is slidably mounted inside the base (4). The sliding block (10) is threadedly connected to the first screw (9). Two sliding grooves (7) are opened at the top of the base (4). The sliding member (6) and the sliding block (10) are fixedly connected by a connecting strip (11). The connecting strip (11) is set inside the sliding groove (7).

3. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The lifting assembly includes a second motor (12) fixedly installed on the top of two sliding parts (6). The output end of the second motor (12) is connected to a second screw (16). The two second screws (16) pass through both sides of the lifting cage (14). The top of the two sliding parts (6) are respectively fixedly installed with two slide rods (13). The four slide rods (13) are respectively slidably connected to the four corners of the lifting cage (14).

4. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The Y-axis drive assembly includes a fourth motor (26) fixedly mounted on the frame (21). The output end of the fourth motor (26) is connected to a fourth screw (22). A slider (23) is threaded onto the fourth screw (22). An electric push rod (24) is fixedly mounted on the slider (23) via a connector. The output end of the electric push rod (24) is connected to a fixing member (28). The fixing member (28) is fixedly connected to a wedge plate (29).

5. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The limiting component includes a first through groove (30) and a second through groove (31) formed on the lifting plate (19). A first limiting block (32) is slidably installed inside the first through groove (30), and a second limiting block (33) is slidably installed inside the second through groove (31). In addition to being able to slide up and down along the first through groove (30) and the second through groove (31), the first limiting block (32) and the second limiting block (33) are also able to slide in the horizontal direction. The first limiting block (32) is engaged with one of the acute angle ends of the reinforcing rib (3), and the second limiting block (33) is engaged with the other acute angle end of the reinforcing rib (3).

6. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The limiting assembly also includes a connecting plate (34) fixedly installed between the first limiting block (32) and the second limiting block (33), and the connecting plate (34) is located below the lifting plate (19).

7. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 1, characterized in that, The adjustment assembly includes a first toothed roller (39) and a second toothed roller (40). A rotating shaft (38) is fixedly installed on the first toothed roller (39) and the second toothed roller (40). The rotating shaft (38) inside the first toothed roller (39) and the second toothed roller (40) is rotatably installed on the bottom end of the lifting plate (19) through a support plate (37) and is respectively set on one side of the first limiting block (32) and the second limiting block (33). A first tooth groove (35) is opened on the contact surface between the first limiting block (32) and the first toothed roller (39). A second tooth groove (36) is opened on the contact surface between the second limiting block (33) and the second toothed roller (40). The first toothed roller (39) and the second toothed roller (40) respectively mesh with the first tooth groove (35) and the second tooth groove (36).

8. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 7, characterized in that, The adjustment assembly also includes a fifth motor (41) fixedly mounted on one of the support plates (37), the output end of the fifth motor (41) being connected to one of the rotating shafts (38) in a transmission connection.

9. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 7, characterized in that, A drive belt assembly (42) is provided between the two rotating shafts (38). The drive belt assembly (42) includes sprockets fixedly mounted on the two rotating shafts (38), and the two sprockets are connected by a chain drive.

10. The automatic feeding mechanism for reinforcing ribs used in lamp tube welding based on PLC according to claim 7, characterized in that, A drive belt assembly (42) is provided between the two rotating shafts (38). The drive belt assembly (42) includes sprockets fixedly mounted on the two rotating shafts (38), and the two sprockets are connected by a chain drive.

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