Automatic welding production line for carriage side plates

Abstract

The invention provides an automatic welding production line for carriage side plates, and mainly relates to the field of special vehicle carriage welding. An automatic welding production line for carriage side plates comprises a spot welding platform and a conveying line, a plurality of welding positions are arranged on the conveying line, a first lifting seat is arranged in the spot welding platform, a plurality of lifting rollers are rotationally arranged on the first lifting seat, and after the first lifting seat is jacked, the lifting rollers penetrate through long holes and then are exposed above the spot welding platform; lifting frames are arranged on the two sides of the welding position; a lifting arm is arranged on a lifting sliding rail in a sliding mode; an extending arm is arranged at the front end of the lifting arm; a clamping head is arranged at the front end of the extending arm, a second lifting seat is arranged below the welding position, and a plurality of supporting rods are arranged at the top of the second lifting seat in an array mode. The method has the beneficial effects that the spot welding procedure and the full welding procedure of the carriage side plate are connected, the transfer time between the two procedures is shortened, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention mainly relates to the field of special vehicle carriage welding, and in particular to an automatic welding production line for carriage side panels. Background Art

[0002] Special vehicles are mainly designed according to the main engine size of the main engine manufacturer, and the appropriate carriage is designed to match it to complete the assembly of special vehicles. The side panels of the carriage are welded using square tubes as the frame and steel plates as the guard plates. Due to its large overall size, it is usually welded after being laid flat on the welding platform. In the welding process, after the frame is positioned, it is necessary to first fix it by manual spot welding, and then use manual or welding equipment to complete the full welding operation.

[0003] In order to improve welding quality and efficiency, full welding operations are usually completed by 1-2 welding manipulators. Since the operation actions and processing time of spot welding and full welding are different, the overall welding process is either to wait for the manipulator to perform full welding after manual spot welding is completed, or to transfer the spot-welded side panels of the carriage after manual spot welding, and then perform secondary loading and positioning before completing full welding.

[0004] The above processing methods all result in the inability to fully utilize the means of production, making the overall process discontinuous, and there is still much room for improvement in production efficiency. Summary of the invention

[0005] In order to solve the shortcomings of the prior art, the present invention provides an automated welding production line for car side panels, which connects the spot welding process and the full welding process of the car side panels, reduces the transfer time between the two processes, and greatly improves the utilization efficiency of production materials.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: A car body side panel automated welding production line comprises a spot welding platform and a conveyor line, wherein the spot welding platform is arranged upstream of the conveyor line, the conveyor line has a plurality of welding positions, a plurality of long holes are linearly arranged on the spot welding platform, a first lifting seat is arranged inside the spot welding platform, a plurality of lifting rollers are rotatably arranged on the first lifting seat, the lifting rollers correspond to the long holes one by one, at least one of the lifting rollers is a power roller, when the first lifting seat is lifted, the lifting rollers pass through the long holes and are exposed above the spot welding platform, and at this time, the lifting rollers are at the same height as the conveyor line, the conveyor line is a roller conveyor, a cantilever frame is arranged above the welding position, a welding manipulator is arranged on the cantilever frame, lifting frames are arranged on both sides of the welding position, and a vertical lifting frame is arranged on the lifting frame A lifting slide rail and a lifting screw drive mechanism, a lifting arm is slidably arranged on the lifting slide rail, an extension arm is arranged at the front end of the lifting arm, an extension hydraulic cylinder is arranged between the lifting arm and the extension arm, the extension arm is in a "Y"-shaped structure, a "C"-shaped clamping head is arranged at the front end of the extension arm, a second lifting seat is arranged below the welding position, a plurality of support rods are arranged in an array on the top of the second lifting seat, when the second lifting seat is lifted, the support rods pass through the gap of the conveyor line to lift the side plate, a positioning frame is arranged below the end of the welding position, a positioning plate is slidably arranged on the positioning frame, a lifting cylinder for driving the positioning plate to lift and lower is arranged on the positioning frame, when the lifting cylinder drives the positioning plate to rise, the positioning plate passes through the gap of the conveyor line to position the side plate.

[0007] The first lifting seat includes a first lifting hydraulic cylinder and a plurality of first lifting sleeves. A first lifting plate is arranged on the top of the first lifting sleeve. A plurality of pairs of rotating seats are arranged on the first lifting plate. The lifting rollers are arranged on the rotating seats in a one-to-one correspondence.

[0008] The lifting roller close to the conveying line is a power roller, and the power roller is a rubber roller.

[0009] The second lifting seat comprises a second lifting hydraulic cylinder and a plurality of second lifting sleeves, a second lifting plate is arranged on the top of the second lifting sleeves, and the support rods are arranged in an array on the top of the second lifting plate.

[0010] The front end of the lifting arm has a sliding chamber, a plurality of limiting slide grooves are arranged in the sliding chamber, a sliding pair matching the limiting slide grooves is arranged on the extension arm, the bottom of the extension hydraulic cylinder matches the sliding chamber, and the front end of the piston rod of the extension hydraulic cylinder is fixedly connected to the end of the extension arm.

[0011] The front end of the clamping head is a trapezoidal opening, and the rear end of the clamping head is a docking groove adapted to the thickness of the side plate of the carriage.

[0012] A clamping cylinder is arranged on the top of the clamping head, a piston rod of the clamping cylinder passes through the top of the clamping head and is exposed in the docking groove, and a clamping sheet is arranged at the front end of the piston rod of the clamping cylinder.

[0013] The lifting arms on both sides are raised and lowered synchronously. When the two lifting arms lift the carriage side panels to the welding height, the distance between the carriage side panels and the conveyor line is greater than the height of a single carriage side panel.

[0014] The conveyor line in the area where each welding position is located is controlled in sections.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The present invention connects the spot welding process and the full welding process of the special vehicle compartment side panel welding process, realizes the automatic transportation of the spot-welded compartment side panels through the conveyor line, enables the compartment side panels to smoothly complete the automatic full welding operation at the welding position, and improves the welding efficiency.

[0016] The present invention enables one spot welding station to correspond to a number of full welding stations, so that the production materials of the spot welding stations can be fully utilized, thereby improving production efficiency, realizing dedicated personnel for dedicated posts, and improving the utilization rate of personnel.

[0017] The present invention completes the grasping and positioning of the car side panel by extending the arm, and realizes the lifting of the car side panel by using the lifting arm, and can automatically complete the processing operation of the full welding process without human participation, thereby greatly improving the degree of automation and improving production efficiency.

[0018] Multiple full welding stations are arranged linearly, and the conveying status of the carriage side panels is adjusted to enable multiple welding processes to be carried out in an orderly manner, reducing the transfer time of workpieces and improving the overall processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a reference diagram of the use state of the present invention; Attached Figure 2 It is a schematic diagram of the partial structure of the main viewing angle of the present invention; Attached Figure 3 It is a schematic diagram of the structure of the present invention from a top view perspective; Attached Figure 4 It is a schematic diagram of the structure of the first lifting seat of the present invention; Attached Figure 5 It is a schematic diagram of the structure of the second lifting seat of the present invention; Attached Figure 6 It is a schematic diagram of the lifting frame structure of the present invention; Attached Figure 7 It is a partial cross-sectional structural schematic diagram of the extension arm of the present invention; Attached Figure 8 The present invention Figure 1 A partial enlarged structural diagram of the middle part; Attached Fig. 9 The present invention Figure 2 A schematic diagram of the partially enlarged structure of the middle B part; Attached Fig.10 The present invention Figure 6 Schematic diagram of the partially enlarged structure of part C in the middle.

[0020] Numbers shown in the accompanying drawings: 1, spot welding platform; 2, conveyor line; 3, welding position; 4, first lifting seat; 5, lifting frame; 6, lifting arm; 7, second lifting seat; 8, cantilever frame; 9, positioning frame; 11, long hole; 41, lifting roller; 42, first lifting hydraulic cylinder; 43, first lifting sleeve; 44, first lifting seat; 45, rotating seat; 51, lifting slide rail; 52, lifting screw drive mechanism; 61, extension arm; 62, extension hydraulic cylinder; 63, clamping head; 631, trapezoidal opening; 632, docking groove; 64, sliding pair; 65, clamping cylinder; 66, clamping sheet; 71, support rod; 72, second lifting hydraulic cylinder; 73, second lifting sleeve; 74, second lifting seat; 81, welding manipulator; 91, positioning plate; 92, lifting cylinder. DETAILED DESCRIPTION

[0021] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0022] like Figure 1-10 As shown, the present invention discloses an automated welding production line for car side panels, comprising a spot welding platform 1 and a conveyor line 2, wherein the spot welding platform 1 is arranged upstream of the conveyor line 2, and the conveyor line 2 has a plurality of welding positions 3. A welding robot 81 is used at the welding position 3 to fully weld the spot-welded car side panel welds. Generally speaking, two welding robots 81 are used at the same welding position 3 to achieve full coverage of the car side panels. According to our calculation of working hours, the time taken by the double welding robots 81 to complete the full welding operation is about 2.4 times the time taken for positioning and spot welding of the car side panels. Therefore, one spot welding process is combined with three groups of full welding processes to maximize the use of production materials and improve the overall welding processing efficiency.

[0023] The spot welding platform 1 is linearly provided with a plurality of long holes 11, and the long holes 11 extend along the width direction of the spot welding platform 1. The spot welding platform 1 is provided with a plurality of clamping fixtures, and the clamping fixtures are used to clamp and position the steel plate of the side plate of the carriage. The spot welding platform 1 is used as an operating table for spot welding square tubes fixed on the steel plate, and the operator can stand on the spot welding platform 1 to complete the spot welding operation.

[0024] A first lifting seat 4 is arranged in the spot welding platform 1, and a plurality of lifting rollers 41 are rotatably arranged on the first lifting seat 4, and the lifting rollers 41 correspond to the long holes 11 one by one. Specifically, the first lifting seat 4 includes a first lifting hydraulic cylinder 42 and a plurality of first lifting sleeves 43, and a first lifting plate 44 is arranged on the top of the first lifting sleeve 43. The first lifting hydraulic cylinder 42 serves as a lifting power mechanism, and the first lifting sleeve 43 serves as a support and limit assembly, which is used to guide the lifting of the first lifting plate 44. A plurality of pairs of rotating seats 45 are arranged on the first lifting plate 44, and the lifting rollers 41 are rotatably mounted on the rotating seats 45 one by one. At least one of the lifting rollers 41 is a power roller. When the first lifting seat 4 is lifted, the lifting roller 41 passes through the long hole 11 and is exposed above the spot welding platform 1, and at this time, the lifting roller 41 is at the same height as the conveyor line 2. By lifting the lifting roller 41, the side panel of the carriage that has been spot welded can be lifted up so that it can be conveyed to the conveyor line 2 for the next process.

[0025] Specifically, in order to ensure the stable conveying of the carriage side panels by the lifting rollers 41, the lifting rollers 41 close to the conveyor line 2 are powered rollers, which are rubber rollers. The friction between the rubber rollers and the carriage side panels is large, and the carriage side panels can be stably conveyed to the conveyor line 2.

[0026] The conveyor line 2 is a roller conveyor, and the conveyor line 2 in each welding position 3 is controlled in sections. By individually controlling the conveyor line 2 at each welding position 3, energy consumption can be reduced during the transportation of the side panels of the carriage. At the same time, the transmission distance of the power mechanism can be reduced, and the load of the power mechanism can be reduced.

[0027] A cantilever frame 8 is arranged above the welding position 3, and a welding manipulator 81 is installed at the bottom of the cantilever frame 8. In this embodiment, there are two welding manipulators 81, which are respectively located on both sides of the cantilever frame 8, so as to fully cover the length direction of the side panel of the carriage, so as to improve the efficiency of full welding of the weld seam of the side panel of the carriage.

[0028] Lifting frames 5 are arranged on both sides of the welding position 3, and lifting slide rails 51 and lifting screw drive mechanisms 52 are vertically arranged on the lifting frames 5. Lifting arms 6 are slidably arranged on the lifting slide rails 51. Specifically, the end of the lifting arm 6 has a sliding seat, and a plurality of sliding blocks that slide with the lifting slide rails 51 are installed on both sides of the sliding seat. Through the cooperation of the plurality of sliding blocks with the lifting slide rails 51, it can be ensured that the far end of the lifting arm 6 is stably supported when a force is applied. A screw nut that cooperates with the screw is installed on the sliding seat, and the lifting screw drive mechanism 52 is driven by a servo motor, so that the lifting arm 6 can be driven to be stably raised and lowered.

[0029] An extension arm 61 is provided at the front end of the lifting arm 6, and an extension hydraulic cylinder 62 is provided between the lifting arm 6 and the extension arm 61, and the extension arm 61 is in a "Y"-shaped structure. Specifically, a sliding chamber is provided at the front end of the lifting arm 6, and a plurality of limiting slide grooves are provided in the sliding chamber. A sliding pair 64 matched with the limiting slide grooves is provided on the extension arm 61, and the bottom of the extension hydraulic cylinder 62 is matched with the sliding chamber, and the front end of the piston rod of the extension hydraulic cylinder 62 is fixedly connected with the end of the extension arm 61. The extension arm 61 can be driven to perform an extension action by driving the extension hydraulic cylinder 62. The present invention is used to position and clamp the two ends of the car body side panels by extending the extension arm 61, so that the car body side panels can be lifted by the lifting arm 6.

[0030] A "C"-shaped clamping head 63 is set at the front end of the extension arm 61. The clamping head 63 can respectively clamp the two ends of the car side panel through the "Y"-shaped fork structure of the extension arm 61, so that the car side panel after spot welding can be positioned before full welding.

[0031] Specifically, the front end of the clamping head 63 is a trapezoidal opening 631, and the rear end of the clamping head 63 is a docking groove 632 that is consistent with the thickness of the car side panel. The large opening end of the trapezoidal opening 631 faces outward. When the extension arm 61 is extended to clamp the car side panel, the trapezoidal opening 631 can guide the positioning and grasping of the car side panel, so that the side of the car side panel can be stably introduced into the docking groove 632. More specifically, a clamping cylinder 65 is provided at the top of the clamping head 63, and the piston rod of the clamping cylinder 65 passes through the top of the clamping head 63 and is exposed in the docking groove 632. A clamping piece 66 is provided at the front end of the piston rod of the clamping cylinder 65. Through the extension action of the clamping cylinder 65, the clamping piece 66 can be driven to press the car side panel, thereby ensuring the stability of the positioning welding of the car side panel.

[0032] Specifically, a second lifting seat 7 is arranged below the welding position 3, and a plurality of support rods 71 ​​are arranged in an array on the top of the second lifting seat 7. When the second lifting seat 7 is lifted, the support rods 71 ​​pass through the gap of the conveyor line 2 to lift the side plate. The second lifting seat 7 includes a second lifting hydraulic cylinder 72 and a plurality of second lifting sleeves 73. A second lifting plate 74 is arranged on the top of the second lifting sleeve 73, and the support rods 71 ​​are arranged in an array on the top of the second lifting plate 74. The second lifting hydraulic cylinder 72 serves as a power mechanism for lifting the second lifting plate 74, and the second lifting sleeve 73 supports and guides the lifting of the second lifting plate 74. The second lifting hydraulic cylinder 72 drives the second lifting plate 74 to rise, and the support rods 71 ​​pass through the gap between the conveyor rollers on the conveyor line 2 to lift the upper side plate of the carriage, and wait until the extension arm 61 positions and clamps the two sides of the side plate of the carriage.

[0033] A positioning frame 9 is arranged below the end of the welding position 3, a positioning plate 91 is slidingly arranged on the positioning frame 9, and a lifting cylinder 92 for driving the positioning plate 91 to rise and fall is arranged on the positioning frame 9. Specifically, the positioning frame 9 has a positioning rail, and the positioning plate 91 is slidably connected to the positioning rail through a sliding assembly. When the lifting cylinder 92 drives the positioning plate 91 to rise, the positioning plate 91 passes through the gap of the conveyor line 2 to position the side plate. The positioning plate 91 is a rigid limit structure, and correspondingly, limit sensors need to be installed on both sides of the conveyor line 2 at the end of the welding position 3 or on the positioning plate 91 itself. When the side plate of the carriage hits the positioning plate 91, the positioning in the length direction is completed, and at the same time, the conveyor line 2 of this section stops running, and the side plate of the carriage is lifted up by the support rod 71, and the positioning and clamping of both sides of the side plate of the carriage is completed by the extension arm 61.

[0034] The lifting arms 6 on both sides are raised and lowered synchronously. When the two lifting arms 6 lift the car side panels to the welding height, the distance between the car side panels and the conveyor line 2 is greater than the height of a single car side panel. The car side panels are lifted to the welding position by the lifting arms 6, and then the car side panels are welded by the welding manipulator 81. When the lifting arms 6 lift the car side panels to the welding position, the distance between the car side panels and the top of the conveyor line 2 is greater than the thickness of the car side panels, so that the subsequent car side panels can smoothly enter the next welding position 3 or enter the next process.

[0035] When performing the welding process of the car side panels, firstly, the steel plates, square tubes and other materials are manually positioned and placed on the spot welding platform 1, and the operator holds the welding gun to complete the spot welding fixation between the square tubes and the steel plates, and between the square tubes and the square tubes. Then, the first lifting seat 4 is controlled to be lifted by the foot-operated trigger switch, and the car side panels that have been spot welded are transferred to the conveyor line 2 for further transportation through the lifting roller 41. Specifically, the conveyor line 2 passes through the first welding position, the second welding position and the third welding position in sequence, and the conveyor lines 2 at the three welding positions 3 are the first control section, the second control section and the third control section respectively. When there is no full welding operation on the car side panel at the first welding position, only the first control section works, and the second control section and the third control section do not work. After the carriage side panel triggers the positioning plate 91 at the first welding position, the second lifting seat 7 rises, and the carriage side panel is lifted by the support rod 71, and then the extension arm 61 is extended, and the clamping head 63 clamps and positions the two sides of the carriage side panel. Immediately afterwards, the lifting arm 6 lifts the carriage side panel to the welding height, and the second lifting seat 7 is reset, and the welding manipulator 81 completes the full welding operation of the carriage side panel. When the first welding position is in full welding operation, and the second welding position does not have a carriage side panel for full welding operation, the first control section and the second control section work, and the third control section does not work. At this time, the carriage side panel passes through the first welding position and moves to the second welding position for welding operation. When the first welding position and the second welding position are both in full welding operation, and the third welding position does not have a carriage side panel for full welding operation, the first control section, the second control section and the third control section all work, and the carriage side panel passes through the first welding position and the second welding position and moves to the third welding position for welding operation. When the first welding position, the second welding position and the third welding position are all in full welding operation, the first control section, the second control section and the third control section all stop running, and wait until the above welding positions are idle before starting according to the above program.

[0036] After the car side panel is fully welded, the second lifting seat 7 is lifted again, the lifting arm 6 is lowered, and the extension arm 61 is retracted to release the fully welded car side panel, which is driven by the support rod 71 back to the conveyor line, and the conveyor line transports the fully welded car side panel to the next process.

[0037] When the first welding position releases the fully welded car side panel, the first control section, the second control section and the third control section all work; when the second welding position releases the fully welded car side panel, the second control section and the third control section work, and the first control section does not work; when the third welding position releases the fully welded car side panel, only the third control section works, and the first control section and the second control section do not work. The fully welded car side panel release process of the device has a higher priority than the process of conveying the car side panel to the welding position after spot welding.

Claims

1. An automatic welding production line for a carriage side panel, comprising a spot welding platform (1) and a conveyor line (2), characterized in that: The spot welding platform (1) is arranged upstream of a conveyor line (2), the conveyor line (2) has a plurality of welding positions (3), a plurality of long holes (11) are linearly arranged on the spot welding platform (1), a first lifting seat (4) is arranged inside the spot welding platform (1), a plurality of lifting rollers (41) are rotatably arranged on the first lifting seat (4), the lifting rollers (41) correspond to the long holes (11) one by one, at least one of the lifting rollers (41) is a power roller, and when the first lifting seat (4) is lifted up, the The lifting roller (41) is exposed above the spot welding platform (1) after passing through the long hole (11), and at this time, the lifting roller (41) is at the same height as the conveyor line (2), and the conveyor line (2) is a roller conveyor. A cantilever frame (8) is arranged above the welding position (3), and a welding manipulator (81) is arranged on the cantilever frame (8). Lifting frames (5) are arranged on both sides of the welding position (3), and lifting slide rails (51) and a lifting screw drive mechanism (52) are vertically arranged on the lifting frame (5). A lifting arm (6) is slidably arranged on the lifting rail (51), a stretching arm (61) is arranged at the front end of the lifting arm (6), an extension hydraulic cylinder (62) is arranged between the lifting arm (6) and the stretching arm (61), the stretching arm (61) is in a "Y"-shaped structure, a "C"-shaped clamping head (63) is arranged at the front end of the stretching arm (61), a second lifting seat (7) is arranged below the welding position (3), a plurality of support rods (71) are arranged in an array on the top of the second lifting seat (7), and when the After the second lifting seat (7) is lifted, the support rod (71) passes through the gap of the conveyor line (2) to lift the side plate, a positioning frame (9) is arranged below the end of the welding position (3), a positioning plate (91) is slidably arranged on the positioning frame (9), and a lifting cylinder (92) for driving the positioning plate (91) to lift and lower is arranged on the positioning frame (9), and when the lifting cylinder (92) drives the positioning plate (91) to rise, the positioning plate (91) passes through the gap of the conveyor line (2) to position the side plate.

2. The automatic welding production line for carriage side panels according to claim 1 is characterized in that: The first lifting seat (4) comprises a first lifting hydraulic cylinder (42) and a plurality of first lifting sleeves (43); a first lifting plate (44) is arranged on the top of the first lifting sleeve (43); a plurality of pairs of rotating seats (45) are arranged on the first lifting plate (44); and the lifting rollers (41) are arranged on the rotating seats (45) in a one-to-one correspondence.

3. The automatic welding production line for carriage side panels according to claim 2 is characterized in that: The lifting roller (41) close to the conveying line (2) is a power roller, and the power roller is a rubber roller.

4. The automatic welding production line for carriage side panels according to claim 1 is characterized in that: The second lifting seat (7) comprises a second lifting hydraulic cylinder (72) and a plurality of second lifting sleeves (73); a second lifting plate (74) is arranged on the top of the second lifting sleeves (73); and the support rods (71) are arranged in an array on the top of the second lifting plate (74).

5. The automatic welding production line for carriage side panels according to claim 1 is characterized in that: The front end of the lifting arm (6) has a sliding chamber, a plurality of limit sliding grooves are arranged in the sliding chamber, a sliding pair (64) matching with the limit sliding grooves is arranged on the extension arm (61), the bottom of the extension hydraulic cylinder (62) matches with the sliding chamber, and the front end of the piston rod of the extension hydraulic cylinder (62) is fixedly connected with the end of the extension arm (61).

6. The automatic welding production line for carriage side panels according to claim 1 is characterized in that: The front end of the clamping head (63) is a trapezoidal opening (631), and the rear end of the clamping head (63) is a docking groove (632) adapted to the thickness of the side plate of the carriage.

7. The automatic welding production line for carriage side panels according to claim 6 is characterized in that: A clamping cylinder (65) is arranged at the top of the clamping head (63); a piston rod of the clamping cylinder (65) passes through the top of the clamping head (63) and is exposed in the docking groove (632); a clamping piece (66) is arranged at the front end of the piston rod of the clamping cylinder (65).

8. The automatic welding production line for carriage side panels according to any one of claims 1 to 7, characterized in that: The lifting arms (6) on both sides are raised and lowered synchronously, and when the two lifting arms (6) lift the carriage side panels to a welding height, the distance between the carriage side panels and the conveyor line (2) is greater than the height of a single carriage side panel.

9. The automatic welding production line for carriage side panels according to any one of claims 1 to 7, characterized in that: The conveyor line (2) in the area where each welding position (3) is located is controlled in sections.

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