Fully automatic welding device and process for spring cylinder and brake hanger

Abstract

The invention discloses a fully automatic welding device for a spring cylinder and a brake hanger, including a fully automatic welding robot and a spring cylinder tooling and a brake hanger tooling matched therewith. The robot integrates a welding manipulator and a positioner, and each tooling is turned on the positioner for easy welding; the first tooling of the hanger welds the sealing plate and the brake pipe, and the rib plate, the brake pipe and the vertical plate are fixed by points; the second tooling of the hanger first welds the vertical plate and the brake pipe, and then welds the fillet welds between the rib plate, the brake pipe and the vertical plate; the first tooling of the spring cylinder welds the pad plate and the upper cover plate, the vertical plate assembly is fixed by points, the vertical plate butts the groove surface weld, the second tooling of the spring cylinder fixes the lower cover plate and the vertical plate assembly, and the shock absorber seat plate is welded with the shock absorber rib plate; the third tooling of the spring cylinder welds the spring cylinder ring weld and the vertical plate bottom seal weld; the fourth tooling of the spring cylinder welds the welds between the shock absorber parts and the vertical plate assembly. The invention also discloses a fully automatic welding process of the device, which can improve production capacity and reduce labor intensity.

Description

Technical Field

[0001] The invention relates to a rail transit bogie system, which is applied to the assembly and welding of suspension and brake parts of a vehicle body bogie, and specifically relates to a spring cylinder and a brake hanger full-automatic welding device and a welding process thereof. Background Art

[0002] Spring barrels are used in my country's 25T passenger cars and 160 km / h centralized power EMU trains, and are key components of train bogies. The spring barrel components are welded on the bogies and connected to the wheelsets through spring groups, playing the role of vehicle load bearing and shock absorption.

[0003] The existing technology is manual assembly and manual welding. Since there are many processes for the spring cylinder, the processing and manufacturing process is cumbersome. The manual welding process is: ① welding the spring cylinder pad and the upper cover plate; ② matching the spring cylinder vertical plate; ③ matching the spring cylinder vertical plate and the lower cover plate; ④ welding the spring cylinder vertical plate butt weld; ⑤ matching the vertical plate, the upper and lower cover plates; ⑥ welding the circumferential weld between the spring cylinder vertical plate and the upper and lower cover plates, and welding the shock absorber seat vertical plate and the shock absorber seat plate weld at the same time; ⑦ adjusting the upper and lower cover plates; ⑧ assembling and welding the shock absorber seat and the cylinder body; ⑨ repairing and grinding the weld, stamping and engraving, and inspecting the weld. The above-mentioned numerous and cumbersome processes result in a low daily output of the spring cylinder, requiring more personnel to meet the daily delivery volume of the product. In addition, the welding volume of the spring cylinder is large and the weld quality requirements are high, which requires strict skill levels for welding operators. For example, the circumferential weld must be welded continuously and in one go. The labor intensity of the welding operator is very high, and it is very easy to fatigue, resulting in a decline in welding quality and affecting product quality.

[0004] The brake hanger is used in the PW120E subway bogie and is a key component of the brake assembly in the bogie. The brake assembly is connected to the bogie through this component. The existing technology is manual assembly and manual welding. Under the existing technical conditions, the relative position of the brake hanger vertical plate is difficult to guarantee. The error of manual assembly often causes unqualified products and a large amount of rework. In addition, the assembly position of the brake hanger rib plate belongs to the spatial dimension, and the manual sample marking assembly is also difficult to meet its assembly accuracy. Therefore, the inaccurate position of the rib plate will affect the stress of the component and the service life of the product, and there are certain safety hazards. The brake hanger is divided into left and right parts. Manual assembly sometimes reverses the left and right parts, resulting in product scrapping, wasting product materials and increasing production costs.

[0005] Therefore, in view of the above problems, there is an urgent need for a fully automatic welding device and its process to improve the insufficient production capacity, reduce the labor intensity of welding operators, improve the product process flow, and improve the insufficient assembly accuracy of product components. Summary of the invention

[0006] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a fully automatic welding device for a spring cylinder and a brake hanger, which can increase the production capacity of the spring cylinder and the brake hanger, reduce the labor intensity of welding operators, refine the process flow of the product, improve the assembly accuracy of product components, and completely avoid the phenomenon of product misinstallation, missing installation, etc.

[0007] Another object of the present invention is to provide a fully automatic welding process for a spring cylinder and a brake hanger.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] The fully automatic welding device for spring cylinder and brake hanger includes a fully automatic welding robot and its matching spring cylinder tooling and brake hanger tooling. The robot integrates a welding manipulator and a positioner. Each tooling is flipped on the positioner for easy welding at various angles. The brake hanger tooling includes a first hanger tooling and a second hanger tooling. The first hanger tooling is used to weld the sealing plate to the brake pipe and spot-fix the three components of the rib plate, brake pipe and vertical plate. The second hanger tooling is used to first complete the welding of the vertical plate and the brake pipe. The spring cylinder tooling includes four sets of tooling. The first tooling of the spring cylinder welds the pad and the upper cover plate, spot-fixes the vertical plate and the upper cover plate, and welds the vertical plate butt groove surface welds. The second tooling of the spring cylinder spot-fixes the lower cover and the vertical plate, and welds the shock absorber seat plate and the shock absorber rib plate. The third tooling of the spring cylinder welds the spring cylinder ring weld and the vertical plate bottom cover. The fourth tooling of the spring cylinder welds the welds between the various parts of the shock absorber and the vertical plate.

[0010] Furthermore, the first tooling of the hanger includes a variety of welding areas, area one: brake pipe assembly limits are provided at both ends of the brake pipe of the brake hanger, and sealing plate clamps are provided on the outer sides of both ends of the brake pipe. The sealing plate clamps can fix the sealing plate by the material of its own electromagnetic parts, and send the sealing plate into the brake pipe through the movement of the cylinder and then withdraw after being fixed; area two: brake pipe limits and clamping devices are respectively provided on the brake pipe, and a first vertical plate limit and a second vertical plate limit are respectively provided at both ends of the vertical plate of the brake hanger, the first vertical plate limit is close to the vertical plate and the brake pipe, and the second vertical plate limit is located at the end mounting seat of the vertical plate, the second vertical plate limit includes a vertical plate fixed limit and a vertical plate movable limit, one side of the vertical plate end mounting seat is fixed by the vertical plate fixed limit, and the other side is pushed tight by the vertical plate movable limit through the cylinder; a rib plate clamp is also provided at the rib plate of the brake hanger. In the second fixture of the hanger, a brake pipe clamping device is provided at one end of the brake pipe, and a limiting structure, i.e., a limiting assembly, is provided at the other end. The limiting assembly also limits and fixes the two vertical plates.

[0011] Furthermore, the first tooling of the spring cylinder includes multiple areas, area one: the tooling is respectively provided with limiters for the arc portion and the end portion of the upper cover plate to fix it, a cylinder clamping device is provided above the tooling to clamp the pad from above, and a movable pad angle adjustment device is also provided above the tooling, which calibrates the holes on the pad to position and adjust the relative positions of the pad and the upper cover plate, and the device will automatically retract after the pad is clamped; area two: the tooling is provided with a vertical plate clamping limiter and a vertical plate groove limiter, the vertical plate groove limiter is located at the junction of the two vertical plates composed of the vertical plates to clamp and fix them, and the vertical plate clamping limiter is located in the middle of the entire vertical plate; an upper cover plate limiter and a center positioning pin are provided above the tooling, and the two are respectively located at the end and center of the upper cover plate.

[0012] Furthermore, the second tooling of the spring cylinder includes multiple areas, area one: the tooling is provided with limits at both ends of the lower cover plate, and fixed limits and movable limits are provided on the end of the upper cover plate above the tooling, and the above four limits are used to ensure that the parallelism between the upper and lower cover plates is less than 1 mm; area two: the tooling is provided with rib plate position positioning pins and rib plate clamping and shock absorber seat positioning parts, the rib plate clamping and shock absorber seat positioning parts include limits and other positioning components, the limit is clamped with the arc position of the shock absorber seat plate, and the other positioning components clamp the two shock absorber rib plates from the outside to the inside and position the shock absorber seat plate; the rib plate position positioning pins pass through the rib plate holes of the two shock absorber rib plates for positioning and fixing.

[0013] Furthermore, the third fixture of the spring barrel includes limit blocks and screws respectively fixing the two ends of the upper cover plate, and the screws pass through the center formed by the upper and lower cover plates and the vertical plate to fix the spring barrel on the fixture;

[0014] Furthermore, the fourth tooling of the spring cylinder is provided with a fixed limiter for the lower cover plate, a movable limiter for the lower cover plate, a material detection sensor and a limit column. The fixed limiter for the lower cover plate and the movable limiter for the lower cover plate limit the lower cover plate, the four limit columns limit the vertical plate composition, and the material detection sensor is used to check whether the shock absorber is missing.

[0015] The fully automatic welding process of spring cylinder and brake hanger adopts a fully automatic welding robot to cooperate with various spring cylinder tooling and brake hanger tooling for fully automatic welding:

[0016] The process flow of the brake hanger includes the following: (1) using the first hanger tool to weld the cover plate to the brake pipe and spot-fix the three components of the rib plate, brake pipe and vertical plate; (2) assembling the workpiece completed in step (1) to the second hanger tool, the second tool will first complete the welding of the vertical plate to the brake pipe, and then complete the welding of the fillet welds between the rib plate and the brake pipe and the vertical plate; (3) repairing, grinding, adjusting the shape, steel stamping and welding inspection of the brake hanger weld;

[0017] The process flow of the spring cylinder includes the following: (1) welding the pad plate to the upper cover plate, spot-fixing the vertical plate assembly to the upper cover plate, and welding the vertical plate butt groove surface weld; (2) spot-fixing the lower cover plate to the vertical plate assembly, and welding the shock absorber seat plate to the shock absorber rib plate; (3) welding the spring cylinder ring weld and the vertical plate bottom seal; (4) welding the welds between the shock absorber parts and the vertical plate assembly; (5) repairing and grinding the spring cylinder weld.

[0018] Furthermore, the step (2) of the spring cylinder process flow is as follows: the components welded in the above step (1) are hoisted on one side of the second tooling of the spring cylinder to complete the vertical plate assembly and the lower cover plate assembly point fixation; after the lower cover plate assembly is completed, the shock absorber seat plate and the left and right shock absorber rib plates are placed on the other side of the second tooling of the spring cylinder to complete the welding of the shock absorber seat plate and the shock absorber rib plate: the bottom positioning pin on the second tooling of the spring cylinder is passed through the hole of the shock absorber seat plate to fix it, the arc position of the shock absorber seat plate is fitted with the limit, and then the shock absorber rib plate is placed on the second tooling of the spring cylinder, and the rib plate position positioning pin is manually operated to pass it through the holes of the two shock absorber rib plates and fix it, ensuring that the two holes of the shock absorber rib plate are concentric and the relative position with the shock absorber seat plate is determined.

[0019] Furthermore, the step (3) of the process flow of the spring cylinder is as follows: the assembly consisting of the upper and lower cover plates and the vertical plate of the spring cylinder assembled in the above step (2) is hoisted on the third tooling of the spring cylinder, the upper cover plate is tightly fitted with the tooling limit, and a screw is used to concentrically penetrate the upper and lower cover plates and the vertical plate assembly to tighten, and the assembly position is kept horizontal; after the assembly is completed, the operator leaves the operation area, and the robot starts the welding program. After starting, the cylinder movement will first flip the above-mentioned horizontal assembly by 90°, and the position of the assembly will be detected and corrected; after the detection is completed, the robot starts to automatically weld the assembled parts, and the welding of the girth weld between the vertical plate assembly and the upper and lower cover plates is completed by rotating the positioner, and the order of the girth weld primer, filling, and covering is carried out in the order of the lower cover plate first and then the upper cover plate.

[0020] Furthermore, after the welding of the ring weld is completed, the positioner will rotate back to the origin of this step and then rotate clockwise 90° and 270° to complete the bottom welding of the butt weld of the vertical plate, and the welding direction is from the lower cover plate inward; after the bottom welding of the vertical plate is completed, the positioner will rotate back to the origin of this step and then adjust the workpiece to a horizontal state through the movement of the cylinder to weld the fillet weld of the weld between the vertical plate and the upper cover plate. The welding of the fillet weld is performed by moving the robot's welding gun counterclockwise.

[0021] Furthermore, the step (4) of the spring cylinder process flow is as follows: placing the adjusted shock absorber seat plate, shock absorber rib plate and the cylinder part of the spring cylinder, that is, a combination of the vertical plate, the upper cover plate and the lower cover plate, at the corresponding position of the fourth tooling of the spring cylinder: the cylinder part is first placed in a space surrounded by a plurality of limit columns, and then the shock absorber seat plate and the shock absorber rib plate are assembled onto the cylinder part. After assembly, the gap between the shock absorber seat plate and the cylinder part is 0-1mm and the shock absorber seat plate fits the tooling; the operator leaves the operating area and clamps the workpiece by pressing the buttons of the operating equipment, and the robot automatically detects, spot fixes and welds the assembled parts.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The number of operators is significantly reduced, which reduces labor costs. The working environment and labor intensity are also improved.

[0024] Spring cylinder: After the implementation of the fully automatic welding process, the number of production operators can be reduced from 10 for manual welding to 3, a 70% reduction in personnel.

[0025]

[0026] Brake hanger: After implementing the fully automatic welding process, the number of production operators can be reduced from 4 for manual welding to 3, a 25% reduction in personnel.

[0027]

[0028] (2) The production cycle has been greatly improved (measured by the production welding process), production efficiency has been greatly improved, and daily production capacity has been increased, which can meet product delivery needs while further saving labor costs.

[0029] Spring cylinder: After implementing the fully automatic welding process, the welding time of a single product is increased by 34% compared to manual welding.

[0030]

[0031] Brake hanger: After implementing the fully automatic welding process, the welding time of a single product is increased by 25% compared to manual welding.

[0032]

[0033] (3) The per capita production capacity has been improved. Through comparison, it can be clearly found that the per capita production capacity has been improved and the personnel have been fully utilized.

[0034] Spring cylinder: After implementing the fully automatic welding process, the per capita production capacity has increased by 4.7 times compared with manual welding.

[0035] Manual welding 10 people 5.5 items 8 hours 0.55 pieces per person Automatic welding 3 people 8 items 8 hours 2.6 pieces per person

[0036] Brake hanger: After implementing the fully automatic welding process, the per capita production capacity has increased by 2.1 times compared with manual welding.

[0037] Manual welding 4 people 10 items 8 hours 2.5 pieces per person Automatic welding 3 people 16 items 8 hours 5.3 pieces per person

[0038] (4) Improved welding quality, suitable for assembly line operation

[0039] The consistency of products welded by automatic welding is better, the joint position is fixed, and the subsequent grinding and repair are fixed, which is suitable for mass production. Due to assembly errors, there will be a certain deviation in the joint position of manual welding, and the consistency of batch products is not good.

[0040] The automatic welding seam has a large penetration depth and good welding quality. For example, the automatic welding seam penetration depth can reach 4mm, while the manual welding seam penetration depth can reach a maximum of 2mm.

[0041] It can reduce labor intensity. You only need to place the components in the corresponding positions according to the process. At the same time, there are detection equipment on the tooling to effectively prevent errors. Compared with manual welding, it reduces the influence of human factors.

[0042] The production process is safer.

[0043] In summary, the present invention has a high degree of automation and can realize one-button start to automatically complete clamping, gun cleaning, and welding (manual loading and unloading is required); the welded products have good consistency, and the overall sensory quality of the products is improved while meeting the technical requirements of the products; the equipment has a "starting point detection" function that can detect component positions with deviations within 8mm, that is, the equipment can automatically correct deviations within 8mm; the welding tooling has a detection function, and has the functions of preventing wrong installation and leaking installation, which can avoid errors caused by human factors; the equipment has good welding quality, and full penetration welding can be achieved without root cleaning, which reduces the amount of grinding work, improves the production environment, and reduces the amount of auxiliary materials used; the equipment is suitable for assembly line operations, and has double workstations that can meet the work of picking up and installing parts at another workstation while one workstation is welding, which can greatly improve production efficiency and improve personnel utilization; the equipment of the present invention can provide a certain technical accumulation for automated welding and even automated production in this industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of a spring barrel;

[0045] Figure 2 is a schematic diagram of a brake hanger;

[0046] Figure 3 is the side view of the robot body;

[0047] Figure 4 It is a top view of the robot body;

[0048] Figure 5 It is a side view of the positioner;

[0049] Figure 6 This is the overall diagram of the first tooling of the brake hanger;

[0050] Figure 7 This is an enlarged view of the middle part of the first tooling of the brake hanger;

[0051] Figure 8 It is an enlarged view of the two ends of the first tooling of the brake hanger;

[0052] Fig. 9 This is an enlarged view of the first tooling sealing plate clamping part of the brake hanger;

[0053] Fig.10 This is the first tooling rib clamp of the brake hanger. Figure 1 ;

[0054] Fig.11 This is the first tooling rib clamp of the brake hanger. Figure 2 ;

[0055] Fig.12 This is the first tooling rib clamp of the brake hanger. Figure 3 ;

[0056] Fig.13 This is an enlarged view of the second limit position of the first tooling vertical plate of the brake hanger;

[0057] Fig.14 This is a schematic diagram of the second tooling of the brake hanger;

[0058] Fig.15 This is the welding sequence diagram of the second tooling of the brake hanger;

[0059] Fig.16 It is the overall diagram of the first tooling of the spring cylinder;

[0060] Fig.17 This is an enlarged view of the left side of the first tooling of the spring barrel;

[0061] Fig.18 This is an enlarged view of the right side of the first tooling of the spring barrel;

[0062] Fig.19 This is the overall diagram of the second tooling of the spring cylinder;

[0063] Fig. 20 This is an enlarged view of the left side of the second tooling of the spring barrel;

[0064] Fig.21 This is an enlarged view of the right side of the second tooling of the spring cylinder;

[0065] Fig. 22 Schematic diagram of the positional relationship between the rib plate and the seat plate of the second tooling shock absorber of the spring cylinder;

[0066] Fig.23 It is a schematic diagram of the third tooling of the spring cylinder;

[0067] Fig.24 It is a schematic diagram of the fourth tooling of the spring cylinder;

[0068] Among them, 1-robot body, 11-control cabinet, 12-positioner, 13-intermediate screen, 14-start detection system, 15-gun cleaning mechanism, 16-safety fence, 17-manipulator, 18-wire support, 19-gun cooling system;

[0069] 2-spring cylinder, 21-pad, 22-lower cover plate, 23-upper cover plate, 24-vertical plate assembly, 25-shock absorber rib plate, 26-shock absorber seat plate, 27-rib plate hole;

[0070] 3-brake hanger, 31-vertical plate, 32-brake pipe, 33-rib plate, 34-sealing plate; 3A-sealing plate and brake pipe welding area, 3B-vertical plate and rib plate assembly point fixing area;

[0071] 4-brake hanger welding tooling, 41-brake hanger first tooling, 411-closing plate clamping piece, 411A-cylinder push assembly material direction, 411B-cylinder retract exit closing plate clamping piece direction; 412-brake pipe assembly limit, 413-pressing device, 414-vertical plate first limit, 415-brake pipe limit, 416-vertical plate second limit, 4161-vertical plate fixed limit, 4162-vertical plate movable limit, 417-rib plate clamping piece; 42-brake hanger second tooling, 421-brake pipe pressing device, 422-limiting assembly;

[0072] 5-spring cylinder welding tooling, 51-spring cylinder first tooling, 51A-spring cylinder upper cover plate and pad assembly welding area, 51B-spring cylinder upper cover plate and vertical plate assembly area; 511-upper cover plate arc limiter, 512-cylinder clamping device, 513-pad angle adjustment device, 514-upper cover plate end limiter, 515-upper cover plate limiter, 516-vertical plate clamping limiter, 517-vertical plate groove limiter, 518-center positioning pin;

[0073] 52-spring cylinder second tooling, 52A-spring cylinder lower cover assembly area, 52B-shock absorber seat assembly welding area; 521-lower cover arc limiter, 522-lower cover end limiter, 523-upper cover fixed limiter, 524-upper cover movable limiter, 525-rib plate position positioning pin, 526-rib plate clamping, shock absorber seat positioning piece;

[0074] 53-spring cylinder third fixture, 531-upper limit block, 532-lower limit block, 533-screw; 534-detection point;

[0075] 54-the fourth fixture of the spring cylinder, 541-fixed limit of the lower cover, 542-movable limit of the lower cover, 543-material detection sensor, 544-limit column. DETAILED DESCRIPTION

[0076] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0077] The spring cylinder and brake hanger fully automatic welding device and process of this embodiment are realized by using fully automatic welding robots in combination with various high-precision welding tools. The product process is reorganized to design product-specific assembly welding tools with the best process, and a large number of welding experiments are carried out on these tools to verify the robot's teaching program and welding process.

[0078] See also Figures 3 to 5 As shown, the robot body 1 in the fully automatic welding device of this embodiment is integrated with a welding manipulator 17 and a positioner 12. The robot body 1 includes a control cabinet 11, a positioner 12, an intermediate screen 13, a start detection system 14, a gun cleaning mechanism 15, a safety fence 16, a manipulator 17, a welding wire bracket 18, a welding gun cooling system 19 and a base, etc. The manipulator 17 is installed on the base and can rotate at a certain angle. An intermediate screen 13 is provided on both sides of the base, and a set of positioners 12 are provided on both sides of the intermediate screen 13. The welding tooling is placed on the positioner 12, and the positioner 12 can be turned over to perform welding of various angles of the product on the tooling.

[0079] The robot body 1 has a pre-welding detection function that can automatically correct within an 8mm deviation range, an automatic gun cleaning function, an automatic clamping and material detection function, a positioner linkage function, a broken wire monitoring function, a welding counting function, etc.

[0080] like Figures 6 to 15 As shown, the brake hanger welding tool 4 includes a brake hanger first tool 41 ( Figures 6 to 13 ) and the brake hanger second tooling 42 ( Fig.14 and Fig.15 ), wherein the first tooling 41 of the brake hanger is used to weld the sealing plate 34 to the brake pipe 32, and to spot-fix the brake hanger rib plate 33, the brake pipe 32, and the vertical plate 31.

[0081] like Figure 7 and Fig. 9As shown, brake pipe assembly limiters 412 are provided at both ends of the brake pipe 32, and sealing plate clamps 411 are provided on the outer sides of both ends of the brake pipe 32, so that the sealing plate 34 can be positioned more accurately. The sealing plate 34 can be fixed by the material of its electromagnetic parts, and then the sealing plate 34 is sent to the assembly position by the movement of the cylinder (the sealing plate material is sent to 10mm inside the brake pipe 32, as shown in the direction of 411A). After spot fixing, the sealing plate clamp 411 moves away from the welding area by the movement of the cylinder, as shown in the direction of 411B, and the sealing plate 34 and the brake pipe 32 are formally welded.

[0082] like Figure 8 , Figure 10-13 As shown, first, the tooling is provided with a brake pipe limit 415 and a clamping device 413 on the brake pipe 32, and a first vertical plate limit 414 and a second vertical plate limit 416 are provided at both ends of the vertical plate 31, respectively. The first vertical plate limit 414 is close to the vertical plate 31 and the brake pipe 32, and the second vertical plate limit 416 is located at the vertical plate end mounting seat. The second vertical plate limit 416 includes a vertical plate fixed limit 4161 and a vertical plate movable limit 4162. One side of the vertical plate end mounting seat is fixed by the vertical plate fixed limit 4161, and the other side is pushed by the vertical plate movable limit 4162 through a cylinder to tighten the vertical plate 31 (because the vertical plate 31 is a forged part with poor contour size, this method can effectively control the position of the vertical plate 31 end mounting seat, reduce welding deformation and is more beneficial to subsequent machining). A rib clamp 417 is provided with respect to the rib plate 33, as shown in FIG. Figures 10 to 12 As shown, through the clamping of this component, the rib plate 33 no longer relies on template marking for assembly, which improves assembly efficiency and higher assembly accuracy. The stress condition of the rib plate 33 is closer to the theoretical design requirements, and the overall service life of the product is guaranteed.

[0083] like Fig.14 and Fig.15 As shown, the second tooling 42 of the brake hanger is used to first weld the vertical plate 31 and the brake pipe 32, and then complete the fillet welding between the rib plate 33 and the brake pipe 32 and the vertical plate 31. A brake pipe clamping device 421 is provided on one end of the brake pipe 32, and a limiter, i.e., a limiter assembly 422, is provided on the other end. The limiter assembly 422 also limits and fixes the two vertical plates 31.

[0084] like Figures 16 to 18 As shown, the first tooling 51 of the spring cylinder welds the backing plate 21 and the upper cover plate 23, as shown in FIG. Fig.16 As shown in 51A, the spring cylinder vertical plate assembly 24 and the upper cover plate 23 are fixed and welded to the vertical plate butt groove surface weld, as shown in FIG. Fig.16 As shown in 51B.

[0085] Specific: such as Fig.17As shown, the tooling is provided with an upper cover arc limit 511 and an upper cover end limit 514 for fixing the upper cover 23, a pad 21 is provided inside the upper cover 23, a cylinder clamping device 512 is provided above the tooling to clamp the pad 21 from above, and a movable pad angle adjustment device 513 is also provided above the tooling to locate the four holes on the pad 21 so as to adjust the position, and the device will automatically retract after the pad 21 is clamped.

[0086] like Fig.18 As shown, two vertical plates are placed on the tooling, and then bent separately to form a cylinder, namely, the vertical plate assembly 24. The tooling is provided with a vertical plate clamping limit 516 and a vertical plate groove limit 517. The vertical plate groove limit 517 is located at the junction of the two vertical plates for clamping and fixing. The upper cover plate 23 is placed above the vertical plate assembly 24. The tooling is provided with an upper cover plate limit 515 and a center positioning pin 518 for the upper cover plate 23, which are respectively located at the end and the center of the upper cover plate 23. In this way, the relative position of the vertical plate assembly 24 and the upper cover plate 23 can be determined by the four positioning limits, and the positioning is fast and accurate. At the same time, the vertical plate clamping limit 516 can clamp and adjust the vertical plate assembly 24, reducing the process of adjusting the vertical plate in advance during manual welding, reducing the process and improving efficiency.

[0087] like Figures 19 to 22 As shown, the second spring cylinder tooling 52 spot-fixes the spring cylinder lower cover plate 22 and the spring cylinder vertical plate assembly 24 , and welds the shock absorber seat plate 26 and the shock absorber rib plate 25 .

[0088] Specific: such as Fig. 20 As shown, the tooling is provided with a lower cover plate arc limiter 521 and a lower cover plate end limiter for the lower cover plate 22, and then the above Fig.18 The vertical plate assembly 24 with the upper cover plate 23 at the midpoint is placed on the lower cover plate 22, and a limiting structure for the upper cover plate 23 is provided above the tooling, including a fixed limit 523 for the upper cover plate and a movable limit for the upper cover plate. Through the above-mentioned limit controls, the parallelism between the upper and lower cover plates can be less than 0.5mm (the design requirement is less than 1mm).

[0089] like Fig.21 As shown, the tooling is provided with a rib plate position positioning pin 525 and a rib plate clamping and shock absorber seat positioning member 526. The rib plate clamping and shock absorber seat positioning member 526 includes a limiter, which is clamped with the arc position of the shock absorber seat plate 26. Other components clamp the two shock absorber rib plates 25 from the outside to the inside and position the shock absorber seat plate 26; the rib plate position positioning pin 525 passes through the rib plate holes 27 of the two shock absorber rib plates 25 for positioning and fixing. It is required that the two shock absorber rib plates 25 are perpendicular to the shock absorber seat plate 26, and the gap size between the two shock absorber rib plates 25 is set to 125±1mm, such as Fig. 22 shown.

[0090] The third fixture 53 of the spring cylinder will perform the spring cylinder ring welding, the vertical plate bottom welding, and the vertical plate assembly 24 and the internal fillet welding of the upper cover plate 23. The fixture will place the spring cylinder product horizontally, with the lower cover plate 22 on top, and fix the two ends of the upper cover plate 23 respectively through the upper limit block 531 and the lower limit block 532. A screw 533 passes through the center of the upper and lower cover plates and the vertical plate assembly 24 for fastening. The fixture is then turned counterclockwise by 90° (such as Fig.23 As shown), at this time, the upper and lower cover plates are perpendicular to the ground.

[0091] like Fig.24 As shown, the fourth fixture 54 of the spring cylinder will weld the seams between the various parts of the shock absorber and the barrel body vertical plate assembly 24. The fixture is provided with a lower cover plate fixed limiter 541, a lower cover plate movable limiter 542, a material detection sensor 543 and a limiter column 544. The lower cover plate fixed limiter 541 and the lower cover plate movable limiter 542 limit the lower cover plate 22, and the four limiter columns 544 limit the barrel body vertical plate assembly 24. The material detection sensor 543 is used to check whether the shock absorber is missing.

[0092] The spring cylinder and brake hanger of this embodiment adopt the working steps of the fully automatic welding process:

[0093] 1. The process flow of the brake mount includes the following: (1) using the first tooling 41 of the brake mount to weld the sealing plate 34 to the brake pipe 32, and spot-fixing the three components of the rib plate 33, the brake pipe 32 and the vertical plate 31; (2) assembling the workpiece completed in step (1) onto the second tooling 42 of the brake mount, the second tooling will first complete the welding of the vertical plate 31 to the brake pipe 32, and finally complete the welding of the fillet welds between the rib plate 33 and the brake pipe 32 and the vertical plate 31; (3) repairing, grinding, adjusting, steel stamping and weld inspection of the brake mount welds;

[0094] ① Welding of the brake hanger cover plate 34; spot-fixing of the three components of the rib plate 33, brake pipe 32 and vertical plate 31: After the brake hanger material is assembled according to the corresponding position of the tooling, the operator leaves the operation area, clamps the workpiece by operating the equipment buttons, and operates the teach pendant to start the welding program after clamping the workpiece. After the welding program is started, the assembled parts will be spot-fixed (spot-fixing welding parameters: current: 230A, voltage: 24V, pause time: 1s). After the spot-fixing welding is completed, the robot body 1 will automatically weld the assembled parts.

[0095] ② The circumferential weld between the brake hanger vertical plate 31 and the brake pipe 32, and the corner weld between the rib plate 33 and the brake pipe 32 and the vertical plate 31: After assembling the materials completed in the first step onto the second-step tooling (i.e., the brake hanger second tooling 42), the welding program will firstly detect the position of the assembled components after the welding program is started, and detect the deviation between the welding position of the assembled components and the teaching trajectory. The detected deviation will be added to the teaching trajectory through automatic calculation by the manipulator 17, avoiding the need for teaching programming after each clamping. After the detection is completed, the robot body 1 will automatically weld the assembled components, and complete the welding of the circumferential weld between the vertical plate 31 and the brake pipe 32 through the rotation of the positioner 12. The welding sequence is preferably as follows: Fig.15 Complete the welding operation in one go as shown in the Chinese and English order (by rotating the tooling clockwise and the welding gun moving synchronously to weld the girth weld, according to Fig.15 The welding is completed in the order of Chinese and English letters, and the welding time is 17 minutes, which is twice as fast as manual welding); after the circumferential weld between the vertical plate 31 and the brake pipe 32 is completed, the positioner 12 is finally rotated to make the rib plate 33 horizontal, and the manipulator 17 completes the corner weld between the rib plate 33 and the brake pipe 32 and the vertical plate 31.

[0096] 2. The process flow of the spring cylinder includes the following: ① The spring cylinder pad 21 is welded with the upper cover plate 23, the spring cylinder vertical plate assembly 24 is assembled with the upper cover plate 23, and the vertical plate butt welds are welded; ② The shock absorber seat plate 26 is welded with the shock absorber rib plate 25, and the vertical plate assembly 24 is assembled with the lower cover plate 22; ③ The circumferential weld of the upper and lower cover plates of the spring cylinder and the vertical plate assembly 24, and the bottom weld of the vertical plate assembly 24; ④ The various parts of the shock absorber seat are assembled with the spring cylinder body vertical plate assembly 24; ⑤ Repairing and grinding of the spring cylinder weld, steel stamping and weld inspection.

[0097] ① The spring cylinder pad 21 and the upper cover 23 are welded together, the spring cylinder vertical plate 24 is assembled with the upper cover 23, and the vertical plate is butt welded: After the materials are placed in the corresponding positions of the tooling, the operator leaves the operation area and clamps the workpiece by operating the equipment buttons (manual clamping of the upper cover 23 and the pad 21 is required). After clamping the workpiece, operate the teach pendant to start the welding program. After the welding program is started, the assembled parts will be spot-fixed (spot-fixing welding parameters: current: 180-200A, voltage: 20-22V, pause time: 1-2s). After the spot-fixing welding is completed, the robot body 1 will automatically weld the assembled parts. First, the fillet weld between the pad 21 and the upper cover 23 will be completed, as shown in the following figure. Fig.17 The welding work is completed in the clockwise order of the welding process, and then the groove surface weld of the vertical plate butt weld is completed, etc. All step jumps are performed automatically.

[0098] ② Welding the shock absorber seat plate 26 and the shock absorber rib plate 25, and assembling and fixing the vertical plate assembly 24 and the lower cover plate 22: Use a frame-type crane to hang the parts welded in the above step ① (the first spring cylinder tooling 51) on the left side of the second spring cylinder tooling 52 to complete the assembly and fixing of the vertical plate assembly 24 and the lower cover plate 22.

[0099] After the lower cover plate 22 is assembled, the shock absorber seat plate 26 and the left and right shock absorber ribs 25 are placed on the right side of the second spring tube fixture 52 to complete the welding of the shock absorber seat plate 26 and the shock absorber ribs 25. The fixture positioning pin passes through the shock absorber seat plate hole, the arc position of the shock absorber seat plate 26 fits with the limiter, and then the shock absorber rib 25 is placed on the fixture. This step requires manual operation (pulling the handle) of the rib position positioning pin 525, and the rib position positioning pin 525 passes through the two shock absorber rib holes 27 and is fixed to ensure that the two holes of the shock absorber rib 25 are concentric and the relative position with the shock absorber seat plate 26 is determined. The operator leaves the operation area and clamps the workpiece by pressing the buttons on the operating device. After clamping the workpiece, operate the teach pendant to start the welding program. The robot will automatically spot fix and weld the assembled parts (spot fix welding parameters: current: 180-200A, voltage: 20-22V, pause time: 1-2s), and then weld the shock absorber seat plate 26 with the left and right shock absorber ribs 25. The shock absorber ribs 25 will be wrapped, and the wrapping is divided into two steps, the wrapping parameters are the same as the spot fix welding. After the shock absorber seat plate 26 and the shock absorber ribs 25 are welded, the opening size of the two shock absorber ribs 25 needs to be adjusted, and the opening size is required to be 125±1mm.

[0100] ③ Circumferential weld welding of the upper and lower cover plates of the spring cylinder and the vertical plate component 24, and bottom weld welding of the vertical plate component 24: The combination of the upper and lower cover plates of the spring cylinder and the vertical plate component 24 assembled in the above step ② is installed on the third tooling 53 of the spring cylinder through a frame-type hoist, and the upper cover plate 23 fits tightly with the tooling limit (i.e., the upper limit block 531 and the lower limit block 532). And use the screw 533 to concentrically pass through the upper and lower cover plates and the vertical plate component 24 to tighten, and keep the assembly position horizontal. After the assembly is completed, the operator leaves the operating area and starts the welding program by operating the teach pendant. After the welding program is started, the components will be flipped 90° by the cylinder movement, and then the position of the assembled components will be detected (before welding starts, the components will be inspected at the beginning, and the inspection points are shown in the figure). Fig.23, the deviation between the position of each material in the component and the theoretical position size can be determined through detection. As long as the deviation is within 8mm, the equipment will automatically correct the deviation, and there is no need to re-teach programming to achieve automatic welding). The deviation between the welding position of the assembled components and the teaching trajectory will be detected. The detected deviation will be added to the teaching trajectory through automatic calculation by the manipulator, avoiding the need for teaching programming steps after each clamping. After the detection is completed, the robot body 1 will automatically weld the assembled components, and the welding of the girth weld between the vertical plate component 24 and the upper and lower cover plates will be completed through the rotation of the positioner 12. The order of girth weld primer, filling, and covering is the lower cover plate 22 first and the upper cover plate 23 later. Note: In this step, the starting and stopping points of each layer of the girth weld must be staggered by at least 50mm.

[0101] After the welding of the inner weld of the bevel of the circumferential weld is completed, the positioner 12 will rotate back to the origin of this step and then rotate clockwise 90° and 270° to complete the bottom welding of the butt weld of the vertical plate 24. The welding direction is from the lower cover plate 22 to the inside.

[0102] After the bottom welding of the vertical plate is completed, the positioner 12 is rotated, and the positioner 12 rotates back to the origin of this step and then adjusts the workpiece to a horizontal state through the cylinder movement to weld the fillet weld of the weld between the vertical plate and the upper cover plate 23. The fillet weld is welded by moving the welding gun counterclockwise.

[0103] After the parts are cooled, the upper and lower cover plates of the spring cylinder are adjusted using a hydraulic jack. After the adjustment, the flatness of the upper cover plate 23 is ≤1mm (the welding area is not measured), the inner opening size of the upper and lower cover plates is 152.5 (0, +1.5mm), the flatness of the lower cover plate 22 is ≤1mm, and the height difference between the highest points of the upper cover plate 23 and the lower cover plate 22 is 383±1mm.

[0104] ④ Assembly and welding of the shock absorber seat and the spring cylinder body: Place the shock absorber seat plate 26 and the cylinder body parts that have been adjusted on the corresponding positions of the fourth tooling 54 of the spring cylinder. The cylinder body parts are first placed in the tooling limit (limit column 544), and then the shock absorber seat is assembled (if there is interference in the shock absorber seat, an angle grinder with a shutter blade is required for grinding) on ​​the cylinder body. After assembly, the gap between the shock absorber seat and the cylinder body is 0-1mm and the shock absorber seat and the tooling fit together. The operator leaves the operating area and clamps the workpiece by pressing the operating device button. After clamping the workpiece, operate the teach pendant to start the welding program. The robot will automatically detect, spot fix and weld the assembled parts. Detect the deviation between the welding position of the assembled parts and the teaching trajectory. The detected deviation will be added to the teaching trajectory through automatic calculation by the manipulator to avoid the need to teach the programming steps after each clamping. Spot fix welding parameters: current: 180-200A, voltage: 20-22V, pause time: 1-2s.

[0105] Specifically, the order of assembly and welding of the shock absorber seat and the spring cylinder body is as follows: (1) the positioner 12 is turned 180° to complete the fillet weld between the shock absorber seat plate 26 and the cylinder body; (2) the positioner 12 is turned to the horizontal state during assembly, and the shock absorber seat plate 26 and the cylinder body groove surface weld are welded (leaving the cover weld unwelded); (3) the positioner 12 is turned 90° counterclockwise to weld the inner fillet weld between the right shock absorber rib plate 25 and the lower cover plate 22; (4) the left shock absorber rib plate 25 and the cylinder body groove surface weld are welded (the first three passes: primer, filling, and the first cover pass);

[0106] (5) Weld the outer corner weld between the left shock absorber rib plate 25 and the lower cover plate 22, and the second cover weld between the left shock absorber rib plate 25 and the cylinder groove surface weld; (6) The positioner 12 rotates 180° clockwise to weld the right shock absorber rib plate 25 and the cylinder groove surface weld (the first three passes: base, filling, and the first cover), and the outer corner weld between the right shock absorber rib plate 25 and the lower cover plate 22, and the second cover weld between the right shock absorber rib plate 25 and the cylinder groove surface weld; The second cover weld of the body groove surface weld; (7) Weld the fillet weld between the left shock absorber rib plate 25 and the inner side of the lower cover plate 22 and the left shock absorber rib plate 25 and the bottom seal of the cylinder; (8) The positioner 12 turns 180° counterclockwise and welds; (9) Weld the fillet welds of the left and right shock absorber rib plates 25. The fillet is divided into two layers, the lower fillet welding parameters are: current 240A, voltage 24V, speed 40cm / min. The upper fillet welding parameters are: current 240A, voltage 24V, speed 60cm / min; (10) The positioner 12 rotates 90 degrees clockwise to complete the two cover welds of the shock absorber seat plate 26 and the cylinder.

[0107] The above description is only a preferred embodiment of the present invention and does not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Spring cylinder and brake hanger fully automatic welding device, characterized in that: The device includes a fully automatic welding robot and a spring cylinder tooling and a brake hanger tooling that cooperate with it. The robot integrates a welding manipulator and a positioner. Each tooling device is flipped on the positioner to facilitate welding at various angles. The brake hanger tooling includes a first hanger tooling and a second hanger tooling. The first hanger tooling is used to weld the sealing plate to the brake pipe and spot-fix the three components of the rib plate, the brake pipe and the vertical plate. The second hanger tooling is used to first complete the welding of the vertical plate and the brake pipe, and then complete the corner weld welding between the rib plate and the brake pipe and the vertical plate. The spring cylinder tooling includes four sets of tooling. The first tooling of the spring cylinder will weld the pad and the upper cover plate, spot-fix the vertical plate assembly and the upper cover plate, and weld the vertical plate butt groove surface weld. The second tooling of the spring cylinder will spot-fix the lower cover plate and the vertical plate assembly, and weld the shock absorber seat plate and the shock absorber rib plate. The third tooling of the spring cylinder will weld the spring cylinder ring weld and the vertical plate bottom weld. The fourth tooling of the spring cylinder will weld the welds between the various parts of the shock absorber and the vertical plate assembly.

2. The fully automatic welding device for spring cylinder and brake hanger according to claim 1 is characterized in that: The first tooling of the hanger includes a variety of welding areas, area one: brake pipe assembly limits are provided at both ends of the brake pipe of the brake hanger, and sealing plate clamps are provided on the outer sides of both ends of the brake pipe. The sealing plate clamps can fix the sealing plate through the material of its own electromagnetic parts, and send the sealing plate into the brake pipe through the movement of the cylinder to be fixed and then withdrawn; area two: brake pipe limiters and clamping devices are respectively provided on the brake pipe, and a first vertical plate limit and a second vertical plate limit are respectively provided at both ends of the vertical plate of the brake hanger, the first vertical plate limit is close to the vertical plate and the brake pipe, and the second vertical plate limit is located at the end mounting seat of the vertical plate, the second vertical plate limit includes a vertical plate fixed limit and a vertical plate movable limit, one side of the vertical plate end mounting seat is fixed by the vertical plate fixed limit, and the other side is pushed by the vertical plate movable limit through the cylinder to tighten the vertical plate; a rib plate clamp is also provided at the rib plate of the brake hanger; In the second fixture of the hanger, a brake pipe clamping device is provided at one end of the brake pipe, and a limiting structure, i.e., a limiting assembly, is provided at the other end. The limiting assembly also limits and fixes the two vertical plates.

3. The fully automatic welding device for spring cylinder and brake hanger according to claim 1 or 2, characterized in that: The first tooling of the spring cylinder includes multiple areas. Area 1: The tooling is respectively provided with limiters for the arc portion and the end portion of the upper cover plate to fix it. A cylinder clamping device is provided above the tooling to clamp the pad from above. A movable pad angle adjustment device is also provided above the tooling. The device calibrates the holes on the pad to position and adjust the relative position of the pad and the upper cover plate. The device will automatically retract after the pad is clamped. Area 2: The tooling is provided with a vertical plate clamping limit and a vertical plate bevel limit. The vertical plate bevel limit is located at the junction of the two vertical plates composed of the vertical plates to clamp and fix them, and the vertical plate clamping limit is located in the middle of the entire vertical plate; an upper cover plate limit and a center positioning pin are provided above the tooling, and the two are respectively located at the end and center of the upper cover plate.

4. The fully automatic welding device for spring tube and brake hanger according to claim 3 is characterized in that: The second tooling of the spring cylinder includes multiple areas. Area 1: the tooling is provided with limits at both ends of the lower cover plate, and fixed limits and movable limits are provided on the end of the upper cover plate above the tooling. The above four limits ensure that the parallelism between the upper and lower cover plates is less than 1 mm; Area 2: the tooling is provided with rib plate position positioning pins and rib plate clamping and shock absorber seat positioning parts. The rib plate clamping and shock absorber seat positioning parts include limits and positioning components. The limits are clamped with the arc position of the shock absorber seat plate, and the positioning components clamp the two shock absorber rib plates from the outside to the inside and position the shock absorber seat plate; the rib plate position positioning pins pass through the rib plate holes of the two shock absorber rib plates for positioning and fixing.

5. The fully automatic welding device for spring tube and brake hanger as claimed in claim 4 is characterized in that: The third fixture of the spring tube includes limit blocks and screws respectively fixing the two ends of the upper cover plate, and the screws pass through the center formed by the upper and lower cover plates and the vertical plate to fix the spring tube on the fixture; The fourth tooling of the spring cylinder is provided with a fixed limit of the lower cover plate, a movable limit of the lower cover plate, a material detection sensor and a limit column. The fixed limit of the lower cover plate and the movable limit of the lower cover plate limit the lower cover plate, the four limit columns limit the vertical plate composition, and the material detection sensor is used to check whether the shock absorber is missing.

6. The fully automatic welding process of spring cylinder and brake hanger is characterized by: Fully automatic welding robots are used to cooperate with various spring cylinder fixtures and brake hanger fixtures for fully automatic welding: The process flow of the brake hanger includes the following: (1) using the first hanger tool to weld the cover plate to the brake pipe and spot-fix the three components of the rib plate, brake pipe and vertical plate; (2) assembling the workpiece completed in step (1) to the second hanger tool, the second tool will first complete the welding of the vertical plate to the brake pipe, and then complete the welding of the fillet welds between the rib plate and the brake pipe and the vertical plate; (3) repairing, grinding, adjusting the shape, steel stamping and welding inspection of the brake hanger weld; The process flow of the spring cylinder includes the following: (1) welding the pad plate to the upper cover plate, spot-fixing the vertical plate assembly to the upper cover plate, and welding the vertical plate butt groove surface weld; (2) spot-fixing the lower cover plate to the vertical plate assembly, and welding the shock absorber seat plate to the shock absorber rib plate; (3) welding the spring cylinder ring weld and the vertical plate bottom seal; (4) welding the welds between the shock absorber parts and the vertical plate assembly; (5) repairing and grinding the spring cylinder weld.

7. The fully automatic welding process for spring cylinder and brake hanger as claimed in claim 6 is characterized in that: Step (2) of the spring cylinder process flow: hoist the components welded in the above step (1) on one side of the second tooling of the spring cylinder to complete the vertical plate assembly and the lower cover plate assembly point fixation; after the lower cover plate assembly is completed, place the shock absorber seat plate and the left and right shock absorber rib plates on the other side of the second tooling of the spring cylinder to complete the welding of the shock absorber seat plate and the shock absorber rib plate: the bottom positioning pin on the second tooling of the spring cylinder is passed through the hole of the shock absorber seat plate to fix it, the arc position of the shock absorber seat plate is fitted with the limit, and then the shock absorber rib plate is placed on the second tooling of the spring cylinder, and the rib plate position positioning pin is manually operated to pass it through the holes of the two shock absorber rib plates and fix it, ensuring that the two holes of the shock absorber rib plate are concentric and the relative position with the shock absorber seat plate is determined.

8. The fully automatic welding process for spring cylinder and brake hanger as claimed in claim 6 or 7, characterized in that: Step (3) of the process flow of the spring cylinder: hoist the assembly consisting of the upper and lower cover plates and the vertical plate of the spring cylinder assembled in the above step (2) onto the third tooling of the spring cylinder, the upper cover plate is tightly fitted with the tooling limit, and a screw is used to concentrically penetrate the upper and lower cover plates and the vertical plate assembly to tighten, and the assembly position is kept horizontal; after the assembly is completed, the operator leaves the operation area, and the robot starts the welding program. After starting, the cylinder movement will first flip the above-mentioned horizontal assembly by 90°, and the position of the assembly will be detected and corrected; after the detection is completed, the robot starts to automatically weld the assembled parts, and the welding of the girth weld between the vertical plate assembly and the upper and lower cover plates is completed by rotating the positioner, and the order of the girth weld primer, filling and covering is the order of the lower cover plate first and then the upper cover plate.

9. The fully automatic welding process for spring cylinder and brake hanger as claimed in claim 8, characterized in that: After the welding of the annular weld is completed, the positioner will rotate back to the origin of this step and then rotate 90° and 270° clockwise to complete the bottom welding of the butt weld of the vertical plate, and the welding direction is from the lower cover plate to the inside; After the bottom welding of the vertical plate is completed, the positioner rotates back to the origin of this step and then the workpiece is adjusted to a horizontal state through the movement of the cylinder to weld the fillet weld of the weld between the vertical plate and the upper cover plate. The fillet weld is welded by moving the robot's welding gun counterclockwise.

10. The fully automatic welding process for spring cylinder and brake hanger according to claim 9, characterized in that: Step (4) of the spring barrel process flow: placing the adjusted shock absorber seat plate, shock absorber rib plate and the barrel component of the spring barrel, that is, a combination of the vertical plate component, the upper cover plate and the lower cover plate, on the corresponding position of the fourth tooling of the spring barrel: the barrel component is first placed in a space surrounded by a plurality of limit columns, and then the shock absorber seat plate and the shock absorber rib plate are assembled on the barrel component, after which the gap between the shock absorber seat plate and the barrel component is 0-1mm and the shock absorber seat plate fits the tooling; the operator leaves the operating area and clamps the workpiece by pressing the operating device button, and the robot automatically detects, spot fixes and welds the assembled components.

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