A flexible welding workstation and production method for sheet heat sink for transformer

Abstract

The present invention discloses a flexible assembly welding workstation and production method of a sheet heat sink for a transformer, and relates to the technical field of sheet heat sinks. The workstation comprises a support frame (1), a robot external shaft (2), a welding robot and a welding gun (3), a centering slide (4), a follower caliper (5), a positioning comb plate (6), and a flexible assembly welding production method; the robot external shaft (2), the centering slide (4), and the follower caliper (5) use the same track to achieve the purpose of consistent foundation; the positioning comb plate (6) is compatible with conveying methods such as conveying vehicles, hoisting, and trusses. According to the existing production mode and process method of sheet heat sinks, the present invention performs automated upgrading on the flexible assembly welding of sheet heat sink unit sheets and oil collecting pipes, which not only solves the problem of high labor intensity in the on-site production mode, but also improves the consistency of the welding quality of the unit sheets and the oil collecting pipes.

Description

Technical Field

[0001] The present invention belongs to the field of plate type radiator processing and manufacturing, and specifically relates to a flexible assembly welding workstation and production method of a plate type radiator for a transformer, which is a core functional component for the assembly welding of a plate type radiator unit plate and an oil collecting pipe and the front and rear transportation sequence. Background Art

[0002] At present, the plate heat sink industry for power transformers has been developed in my country for nearly decades. At present, the assembly and welding process of heat sinks and collectors is as follows: before welding, the heat sinks are manually placed in multi-piece transfer hangers, the human-controlled crane hoists the heat sinks in the multi-piece transfer hangers into the assembly station rack, the human-controlled crane removes the vacant multi-piece transfer hangers, the oil collecting pipe is manually held and placed in the oil collecting pipe positioning clamping mechanism, the oil collecting pipe positioning clamping mechanism is manually started to connect with the heat sink, the welding device is manually started for welding, and the human-controlled crane uses the hanger to lift the welded workpiece and transfer the sequence. Since there are many objective links in this process that rely on manual experience, it is difficult to realize automation. The accuracy of repeated positioning depends entirely on the positioning tooling and the experience of the workers. The hoisting flow and secondary positioning between multiple stations directly affect the accuracy of the plate heat sink during the assembly and welding process, and also have high requirements on the labor intensity of the workers.

[0003] For example, the Chinese utility model patent with announcement number: CN 206286689 U discloses "an automatic welding device for a plate-type radiator collector". The production of this equipment still adopts the above-mentioned production process with many manual participation links, and only the welding step is implemented to achieve automatic welding. The core of this solution still adopts the backward technology that has been used in the industry for many years, and cannot meet the requirements of the automation and informatization of the equipment in this process and the automatic transfer of workpieces in the full-process automated production line of radiator manufacturing. In addition, the welding actuator on each side of the equipment can only rotate and weld around the axis of the oil collecting pipe coaxial with its oil collecting pipe flange positioning mechanism, and cannot weld gooseneck radiators, which are the current mainstream products in the industry. Therefore, the equipment has a single and limited function and low use value, and cannot become an applicable technical solution for the transformation and upgrading of the industry's intelligent manufacturing.

[0004] For another example, in the Chinese invention patent with the publication number CN 107971601 A, which discloses an "automatic welding system and welding method for an oil collecting pipe of a fin type radiator", when the oil collecting pipe and the radiating fin are clamped in place, the upper straight section weld seam and the lower straight section weld seam of the oil collecting pipe in the large flanged radiator are completely blocked by the crossbeam structure and the lateral positioning notches of the radiating fin fixed on the crossbeam, so that the welding of the large flanged radiator cannot be realized;

[0005] In summary, the assembly and welding process of heat sinks and collectors in the plate-type heat sink industry for power transformers still adopts a relatively backward production method, with low production efficiency and poor compatibility. The existing discrete production model of plate-type heat sinks has seriously restricted the development of the industry. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The present invention provides a flexible assembly welding workstation and production method for a sheet heat sink for a transformer, the purpose of which is to solve the dilemma of repeatedly relying on manual and tooling positioning during the assembly and welding process of the sheet heat sink, to provide an efficient and highly compatible positioning and welding means for automated upgrades, to achieve highly compatible docking with previous and subsequent processes, to greatly reduce manual labor intensity and to improve the welding quality of the product.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a flexible assembly welding workstation and production method of a sheet heat sink for a transformer, comprising a support frame, a robot external shaft, a welding robot and a welding gun, a centering slide, a follow-up caliper and a positioning comb plate.

[0010] The support frame provides basic support and guiding functions for the robot's external shaft, centering slide and follow-up caliper, and its guiding device uses the same reference, and the guides of the robot's external shaft, centering slide and follow-up caliper all adopt the same mounting surface; a welding robot and a welding gun are arranged on the robot's external shaft; the positioning comb plate and the support frame are relatively fixed to the ground.

[0011] The support frame includes support columns connected and fixed to the ground, the support columns are evenly distributed on both sides of the positioning comb plate and fixed by longitudinal connecting beams, and the longitudinal beams on both sides are fixed by transverse connecting beams;

[0012] Furthermore, a pair of parallel guide rails are provided on the inner side of the longitudinal connecting beam for the movement of the robot's external axis, the centering slide and the follower caliper.

[0013] Furthermore, a pair of parallel guide rails are fixed on the upper side of the longitudinal connecting beam, which are used for adjusting the spacing of the centering slide when positioning the plate-type heat sink.

[0014] Furthermore, a group of opposite servo electric push rods are fixed on the outer sides of both sides of the longitudinal connecting beam.

[0015] The robot external axis includes a pair of relatively arranged robot eighth axis guide rail devices, and also includes a robot seventh axis bracket, a pair of parallel robot seventh axis guide rails and a robot seventh axis rack are arranged in the middle of the robot seventh axis bracket, a robot positioning plate is arranged on the slider of the robot seventh axis guide rail, and a robot seventh axis servo reduction motor is arranged on the robot positioning plate, and a drive gear is fixed to the output shaft end of the reducer of the robot seventh axis servo reduction motor, and the drive gear is meshed with the robot seventh axis rack to provide active power for the welding robot and the welding gun.

[0016] Furthermore, the seventh axis of the robot's external axis is a translation axis of the welding robot at a fixed distance relative to the oil collecting pipe, and the eighth axis is a feed axis of the welding robot for adjusting the distance relative to the oil collecting pipe.

[0017] The welding robot and welding gun are characterized in that the welding robot is fixed on the robot mounting seat of the robot's external axis, a welding gun collision preventer is arranged on the sixth axis of the welding robot, a welding gun adapter bracket 1 is arranged on the movable end of the welding gun collision preventer, the flange adjustment end of the welding gun adapter bracket 1 is fixedly connected and docked with the flange adjustment end of the welding gun adapter bracket 2, and the two sets of flange adjustment ends can be manually / automatically adjusted according to different welding angles, and a pair of oil collecting pipe welding guns placed in parallel are arranged at the end of the L-shaped grid frame of the welding gun adapter bracket 2.

[0018] Furthermore, the welding gun adapter bracket 1 is characterized in that the end of the flange is fixedly connected to the welding gun collision preventer, and the other hinge pin end is fixedly connected to the welding gun adapter bracket 2 through the avoidance of the adapter in the middle.

[0019] Furthermore, the second welding gun adapter bracket is characterized by a pair of parallel rigid L-shaped welding gun connecting brackets, and a pair of opposing welding guns are arranged at the ends of the pair of parallel rigid L-shaped welding gun brackets for welding the oil collecting pipe.

[0020] The centering slide is centered by a pair of servo electric push rods synchronously driven on both sides, the movable ends of the servo electric push rods are connected and fixed to the C-shaped brackets, the pair of C-shaped brackets fixed the oil collecting pipe bearing beam in the middle, and are strengthened by a pair of bearing beam adapter brackets arranged oppositely, the oil collecting pipe bearing beam is also provided with a positioning groove slide, and the positioning groove slide is provided with multiple groups of oil collecting pipe positioning grooves, and the C-shaped bracket is also provided with a pair of relatively vertical horizontal guide slides and vertical guide slides, and the pair of relatively vertical horizontal guide slides and vertical guide slides move on the robot's eighth axis guide rail (24).

[0021] Furthermore, the oil collecting pipe bearing beam and a pair of symmetrically placed C-shaped brackets are connected and fixed via a bearing beam adapter bracket, and their movement rigidity is ensured.

[0022] Furthermore, the pair of synchronously driven servo electric push rods arranged on both sides opposite to each other can perform center positioning on fin-type radiators of different models. The synchronous servo electric push rods in the same direction move along the track direction of the C-shaped bracket. Before positioning the oil collecting pipe of the fin-type radiator, the system pre-sets a rigid positioning end and the other end as a flexible positioning end, thereby improving the repeatability positioning accuracy of the fin-type radiator.

[0023] The follower caliper includes a follower caliper mounting bracket and a pair of parallel guide slider groups arranged thereon. The follower caliper mounting bracket is fixedly connected with a pair of bracket reinforcement ribs and a cylinder flange plate to form a box shape. A lifting cylinder and a lifting slide plate are arranged inside the box. The lifting cylinder is connected to the follower caliper mounting bracket, and the lifting slide plate is connected to the cylinder flange plate. A follower positioning plate is also arranged on the top of the lifting slide plate. The follower positioning plate is provided with a three-way positioning positioning clamp 1, a positioning clamp 2 and a slideway groove plate.

[0024] Furthermore, the bottom of the lifting cylinder is connected and fixed to the follower caliper mounting bracket, and the telescopic cylinder rod of the lifting cylinder is connected and fixed to the lifting slide plate, thereby playing the role of positioning the follower caliper on the gooseneck flange.

[0025] Furthermore, the positioning clamp 1, the positioning clamp 2 and the slideway groove plate are fixed together on the follower positioning plate, and the positioning spacing between the positioning clamp 1 and the positioning clamp 2 can be quickly replaced according to the size of the gooseneck flange.

[0026] The production method of a flexible assembly welding workstation for a sheet heat sink for a transformer comprises:

[0027] 1) Receive welding processing information of the plate radiator model and the corresponding oil collecting pipe model from the system;

[0028] 2) automatically / manually adjusting the positioning and processing start position of the centering slide (4), the welding robot and the welding gun (3) according to the welding processing information transmitted by the system;

[0029] 3) The plate-type heat sink is transported to the positioning comb plate (6) by an external transport mechanism;

[0030] 4) The centering slide (4) uses its internal oil collecting pipe positioning groove to position and clamp the plate radiator and the oil collecting pipe, and feeds back the current clamping positioning information;

[0031] 5) The robot's external axis (2) moves to the starting welding processing position according to the size of the plate-type heat sink model;

[0032] 6) The welding robot and welding gun (3) call the corresponding welding process path program according to the plate radiator model;

[0033] 7) After the welding robot completes the welding of the oil collecting pipes one by one, the external conveying device transports the fin radiator to the next process step;

[0034] 8) Repeat the above steps to complete the welding work of the next corresponding model of fin-type heat sink.

[0035] Furthermore, the production method of the flexible assembly welding workstation for the plate-type heat sink for transformers is characterized in that, compared with the existing plate-type heat sink welding processing and production method, the positioning of the plate-type heat sink and the oil collecting pipe is completely completed independently by the workstation without manual participation; the plate-type heat sink does not need to be fixed in a fixed form during the loading and unloading transportation, and the workstation can perform accurate secondary positioning and assembly of the radiator unit plate group and the oil collecting pipe at any loading position.

[0036] (III) The present invention has the following beneficial effects:

[0037] The present invention proposes a flexible assembly welding workstation and production method for a plate-type heat sink for a transformer, which adopts the methods of autonomous positioning, compatible loading and shared reference, thereby realizing automatic assembly of the heat sink and the oil collecting pipe, automatic welding of the heat sink and the oil collecting pipe, and unlimited loading of the heat sink and the oil collecting pipe. Compared with the existing manufacturing methods, it greatly reduces the intensity of manual labor, improves production efficiency, and lays a foundation for the fully automated production of the plate-type heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is an axial side view of a flexible welding workstation for a sheet heat sink for a transformer.

[0039] Figure 2 A top view of a flexible welding workstation for a sheet heat sink for a transformer.

[0040] Figure 3 The figure is a side view of a flexible welding workstation for a sheet heat sink for a transformer without a support.

[0041] Figure 4 Schematic diagram of the welding robot's external axis and positioning comb plate.

[0042] Figure 5 This is the axial side view of the robot's seventh axis.

[0043] Figure 6 This is an axial view of the welding robot and welding gun system.

[0044] Figure 7 This is the side view of the centering slide shaft.

[0045] Figure 8 Side view of the positioning comb plate axis.

[0046] Fig. 9 This is a side view of the follower caliper shaft.

[0047] Fig.10 This is the front view of the follower caliper.

[0048] Illustrations and annotations: 1. Support frame; 2. External axis of the robot; 3. Welding robot and welding gun; 4. Centering slide; 5. Follow-up caliper; 6. Positioning comb plate; 7. Robot seventh axis bracket; 8. Robot seventh axis guide rail; 9. Robot seventh axis rack; 10. Robot positioning plate; 11. Robot seventh axis servo reduction motor; 12. Driving gear; 13. Robot eighth axis servo reduction motor; 14. Robot eighth axis guide slider; 15. Robot eighth axis gear; 16. Robot eighth axis servo reduction motor - driven; 17. Welding robot drag chain; 18. Robot mounting seat; 19. Welding robot; 20. Welding gun anti-collision device; 21. Welding gun adapter bracket 1; 22. Welding gun adapter bracket 2; 23. Oil collecting pipe welding gun; 24. Robot eighth axis guide rail; 25. Servo electric push rod; 26. C-type bracket; 27. Horizontal guide slider; 28. Vertical guide slider; 29. ​​Oil collecting pipe bearing beam; 30. Positioning groove slideway; 31. Oil collecting pipe positioning groove; 32. Bearing beam adapter bracket; 33. Positioning comb plate bracket; 34. Adjustment slideway; 35. Comb plate; 36. Positioning comb groove; 37. Follow-up caliper mounting bracket; 38. Guide slider group; 39. Bracket reinforcement rib; 40. Cylinder flange plate; 41. Lifting cylinder; 42. Lifting slide plate; 43. Follow-up positioning plate; 44. Positioning clamp 1; 45. Positioning clamp 2; 46. Slideway groove plate. DETAILED DESCRIPTION

[0049] In order to further explain the technical means adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and use effect of the present invention are described in detail as follows in conjunction with the accompanying drawings:

[0050] Example 1

[0051] See also Figure 1 , Figure 2 As shown, a flexible assembly welding workstation for a sheet heat sink for a transformer includes a support frame 1, a robot external shaft 2, a welding robot and a welding gun 3, a centering slide 4, a follow-up caliper 5 and a positioning comb plate 6.

[0052] The support frame 1 includes support columns fixedly connected to the ground and horizontal and vertical beams forming a frame structure, which are used to provide basic support positioning and partial guide positioning installation surfaces for other mechanisms. The support frame 1 described here is a support frame in a broad sense. All shelves, walls, floors, etc. used for fixing or providing support positioning in this application belong to the scope of the bracket. The invention point of this application is that it includes a robot external axis 2 set on the support frame 1, and also includes a welding robot and welding gun 3 that move on the robot external axis 2, and a centering slide 4 and a follower caliper 5 that move on the track of the support frame 1.

[0053] See also Figure 3 As shown, the figure hides the support frame 1 and only shows other components and mechanisms. The positioning comb plate 6 is fixed at the center position of the workstation and fixedly connected to the ground. The positioning comb plate 6 is used as the center coordinate point of the workstation, and pairs of robot external axes 2, welding robots and welding guns 3 and centering slides 4 are symmetrically arranged on the left and right sides.

[0054] The symmetrically arranged robot external axis 2 uses the slider in its mechanism to move in the robot eighth axis guide rail 24 of the support frame 1, the welding robot and welding gun 3 are arranged on the robot mounting seat 18 of the robot external axis 2, the symmetrically arranged centering slide 4 is arranged on the robot eighth axis guide rail 24 of the support frame 1, and a pair of oppositely arranged synchronously driven servo electric push rods on both sides are fixed to the outer side of the support frame 1.

[0055] See also Figure 4 As shown, the figure shows the symmetrically arranged seventh axis of the robot's external axis 2, the welding robot and welding gun 3 and the positioning comb plate 6. The welding robot is arranged on the seventh axis of the robot's external axis 2, and is driven by the seventh axis of the robot's external axis 2 to move within the welding range. The symmetrical welding robots and welding guns 3 on both sides weld the heat sink and the oil collecting pipe one by one, and the seventh axis of the robot's external axis 2 ensures the equidistant welding accuracy of the unit sheet and the oil collecting pipe.

[0056] See also Figure 5 As shown, the robot external axis 2 is characterized by a pair of relatively arranged robot eighth axis guide rails 24 devices, which include a robot seventh axis bracket 7, a pair of parallel robot seventh axis guide rails 8 and a robot seventh axis rack 9 are arranged in the middle of the robot seventh axis bracket 7, a robot positioning plate 10 is arranged on the slider of the robot seventh axis guide rail 8, and a robot seventh axis servo reduction motor 11 is arranged on the robot positioning plate 10, and a drive gear 12 is fixed to the reducer output shaft end of the robot seventh axis servo reduction motor 11, and the drive gear 12 is meshed with the robot seventh axis rack 9 to provide active power for the welding robot and the welding gun 3.

[0057] A pair of synchronously driven robot eighth-axis servo reduction motors 13 and robot eighth-axis guide sliders 14 are also arranged on both sides of the robot seventh-axis bracket 7. The reducer output shaft end of the robot eighth-axis servo reduction motor 13 is fixed with a robot eighth-axis gear 15. The robot eighth-axis gear 15 and the robot eighth-axis guide slider 14 jointly provide the welding robot and the welding gun 3 with active guidance and active power for the eighth axis; a robot mounting seat 18 is also arranged on the robot positioning plate 10 to provide an installation basis for the welding robot and the welding gun 3.

[0058] See also Figure 6 As shown, a welding robot and a welding gun 3 are characterized in that a welding robot 19 is fixed on a robot mounting seat 18, a welding gun collision preventer 20 is arranged on the sixth axis of the welding robot 19, a welding gun adapter bracket 1 21 is arranged on the movable end of the welding gun collision preventer 20, a circular flange adjustment end of the welding gun adapter bracket 1 21 is fixedly connected with a circular flange adjustment end of a welding gun adapter bracket 22, and the two sets of circular flange adjustment ends can be manually / automatically adjusted according to different welding angles, and a pair of oil collecting pipe welding guns 23 arranged in parallel are arranged at the end of the L-shaped grid frame of the welding gun adapter bracket 22.

[0059] The pair of parallel oil collecting pipe welding guns 23 are composed of two sets of completely independent welding guns, wire feeders and power supplies, and are symmetrically parallel only in hardware installation.

[0060] See also Figure 7 As shown, the centering slide 4 is centered by a pair of oppositely arranged servo electric push rods 25 that are synchronously driven on both sides. The movable end of the servo electric push rod 25 is connected and fixed to a C-shaped bracket 26. The pair of oppositely arranged C-shaped brackets 26 fix the oil collecting pipe bearing beam 29 in the middle, and are strengthened by a pair of oppositely arranged bearing beam adapter brackets 32. The oil collecting pipe bearing beam 29 is also provided with a positioning groove slide 30, and the positioning groove slide 30 is provided with multiple groups of oil collecting pipe positioning grooves 31. The C-shaped bracket 26 is also provided with a pair of relatively vertical horizontal guide sliders 27 and vertical guide sliders 28. The pair of relatively vertical horizontal guide sliders 27 and vertical guide sliders 28 move on the robot's eighth axis guide rail 24.

[0061] The centering slide 4 is also characterized in that it shares the same guide track with the eighth axis of the robot's external axis 2 .

[0062] See also Figure 8As shown, the positioning comb plate 6 includes a positioning comb plate bracket 33, an adjustment slide 34, a comb plate 35 and a positioning comb groove 36. The positioning comb plate bracket described here is a support frame in a broad sense. All welding frames, casting frames, etc. used to fix the comb plate or the positioning comb groove in this application belong to the scope of the positioning comb plate bracket. A pair of parallel adjustment slides 34 are provided on the positioning comb plate bracket 33, and the sliding ends of the adjustment slides 34 are fixedly connected to the comb plate 35, and the positioning comb groove 36 is fixed on the comb plate 35.

[0063] See also Fig. 9 , Fig.10 As shown, the follower caliper 5 is characterized in that it includes a follower caliper mounting bracket 37, and also includes a pair of parallel guide slider groups 38 arranged thereon. The follower caliper mounting bracket 37 and a pair of bracket reinforcement ribs 39 and a cylinder flange plate 40 are fixedly connected together to form a box shape, and a lifting cylinder 41 and a lifting slide plate 42 are arranged inside the box. The lifting cylinder 41 is connected to the follower caliper mounting bracket 37, and the lifting slide plate 42 is connected to the cylinder flange plate 40. A follower positioning plate 43 is also arranged on the top of the lifting slide plate 42, and the follower positioning plate 43 is provided with a three-way positioning positioning clamp 1 44, a positioning clamp 2 45 and a slideway groove plate 46.

[0064] The production method of a flexible assembly welding workstation for a plate-type heat sink for a transformer is as follows: receiving welding processing information of the plate-type heat sink model and the corresponding oil collecting pipe model from the system, automatically / manually adjusting the starting position of the centering slide 4, the welding robot and the welding gun 3, the plate-type heat sink is transported to the positioning comb plate 6 by an external conveying mechanism, the centering slide 4 uses its internal oil collecting pipe positioning groove to position and clamp the plate-type heat sink, the robot's external axis 2 moves to the starting welding position according to the plate-type heat sink model, the welding robot and the welding gun 3 call the corresponding welding path program according to the plate-type heat sink model, and after the welding robot completes the oil collecting pipe welding, the plate-type heat sink is transported to the next process step by the external conveying device, and the above steps are repeated to complete the welding work of the next corresponding model of plate-type heat sink.

[0065] Example 2

[0066] It should be noted that the description scheme of this embodiment is only compared with the centering slide 4 scheme in Example 1, so the components with the same names and figure marks as those in the above-mentioned Example 1 are omitted here.

[0067] In this embodiment, the synchronous transmission method of the centering slide 4 adopts the method of synchronous toothed belt, and the synchronous toothed belt is built into the profile of the support frame 1. At the same time, the C-type bracket 26 is replaced with a flange docking form, and the guide components still use linear guides and sliders. Therefore, the synchronous toothed belt and linear guide are arranged inside the profile of the support frame 1, and the slider group on the linear guide is connected and fixed with a pair of symmetrically arranged flange plates. The flange connector and the load beam adapter bracket 32 ​​of Example 1 are combined into the same fixed connector. A pair of symmetrical flange connectors are then fixedly connected with the oil collecting pipe load beam 29 to form an integral rigid support beam. A positioning groove slide 30 is arranged on the combined fixed rigid support beam, and a plurality of groups of oil collecting pipe positioning grooves 31 are arranged on the positioning groove slide 30. The number and clamping points of the oil collecting pipe positioning grooves 31 are adjusted according to the external dimensions and characteristics of the plate-type radiator.

[0068] The preferred embodiment of the centering slide 4 also includes replacing the servo electric push rod 25 with other mechanisms with high-precision transmission or using other structural linear movable parts that can be combined into a rigid connecting beam.

[0069] Example 3

[0070] It should be noted that in this embodiment, the seventh axis transmission component of the welding robot is arranged at the bottom of the positioning comb plate 6 for movement, so the components with the same names and reference numerals as those in the above-mentioned embodiment 1 are omitted here.

[0071] See also Figure 1 As shown, the scheme of this embodiment is to set the seventh axis of the welding robot's external axis 2 at the bottom of the positioning comb plate 6, thereby, the production and positioning method of this embodiment is changed as follows: the robot's external axis 2 is equipped with the eighth axis of Example 1, and the seventh axis of the robot's external axis 2 is set on the base of the positioning comb plate 6, and is fixed together with the positioning comb plate 6 at the center of the workstation; the welding robot and the welding gun are still set on the robot mounting seat 18 of the robot's external axis 2, and the robot's external axis 2 only provides relative position compensation between the welding robot and the oil collecting pipe of the fin-type radiator; when the welding robot welds the heat sink and the oil collecting pipe weld, the robot's external axis 2 is fixed at the initial position, and the external axis equipped with the positioning comb plate is equidistantly translated, thereby realizing the welding work of the welding robot and the welding gun 3 on the heat sink and the oil collecting pipe.

[0072] Example 4

[0073] It should be noted that the scheme of this embodiment is to divide the support frame 1 into two symmetrical parts, so that the eighth axis of the robot's external axis 2 is also divided into two symmetrical sections, and then the synchronous driving servo electric push rods 25 on both sides of the center slide 4 are installed in reverse relative to the motion rigid mechanism to form a centrally symmetrical setting.

[0074] The support frame 1 and the centering slide 4 proposed in this embodiment are both arranged on the symmetrical sides of the positioning comb plate 6. The preferred scheme of this embodiment is compatible with various types of transportation methods of the upstream and downstream processes of the plate-type radiator oil collecting pipe welding. Because the installation foundation of the workstation is not an integrated steel structure and transmission, the transportation method of the plate-type radiator at the oil collecting pipe welding station is not restricted. Preferably, an AGV transport vehicle can be used for secondary accurate positioning, preferably, an RGV track can be used for continuous welding processing, preferably, an intelligent truss can be used in conjunction with a tapered pin tooling table for positioning, preferably, a handling / stacking robot can be used for accurate positioning, and preferably, manual lifting can be used in conjunction with lifting tooling for special parts processing tests.

[0075] The above embodiments describe the present invention in detail, but the protection scope of the present invention is not limited thereto. Various improvements can be made to the embodiments and the components can be replaced by equivalents without departing from the scope of the present invention. As long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way, and the task figure marks in the claims should not be regarded as limiting the claims involved. No matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. Therefore, all technical solutions that fall within the scope of the claims are within the protection scope of the present invention.

Claims

1. A flexible welding workstation for a sheet heat sink for a transformer, comprising: A support frame (1) is used to provide basic support for the welding robot and its seventh and eighth axes, and to provide a symmetrical installation foundation for the centering slide (4); A robot external axis (2), which is used to provide a cross coordinate activity base for the welding robot relative to the position of the single-side oil collecting pipe; A welding robot and a welding gun (3), which are used for welding the oil collecting pipe of a fin-type radiator; A centering slide (4) is used to center the plate-type radiator unit plate and the oil collecting pipe and ensure the stability of their relative position during the welding process; A follow-up caliper (5) is used to assist in positioning gooseneck tubes of different lengths; A positioning comb plate (6) for equidistant spacing of the unit plates of the plate-type heat sink; The workstation is characterized in that the robot external axis (2) and the centering slide table (4) share the same guide rail; The centering slide (4) is provided with a pair of servo electric push rods (25) that are synchronously driven on both sides and are arranged opposite to each other to perform centering positioning activities. The movable ends of the servo electric push rods (25) are connected and fixed to a C-shaped bracket (26). The pair of C-shaped brackets (26) that are arranged opposite to each other fix the oil collecting pipe bearing beam (29) in the middle and are strengthened by a pair of bearing beam adapter brackets (32) that are arranged opposite to each other. The oil collecting pipe bearing beam (29) is also provided with a positioning groove slideway (30). The positioning groove slideway (30) is provided with a plurality of groups of oil collecting pipe positioning grooves (31). The C-shaped bracket (26) is also provided with a pair of relatively vertical horizontal guide slide blocks (27) and vertical guide slide blocks (28). The pair of relatively vertical horizontal guide slide blocks (27) and vertical guide slide blocks (28) move on the guide rail (24) of the eighth axis of the robot. The robot external axis (2) is a pair of robot eighth axis guide rails (24) devices arranged opposite to each other, comprising a robot seventh axis bracket (7), a pair of parallel robot seventh axis guide rails (8) and a robot seventh axis rack (9) being arranged in the middle of the robot seventh axis bracket (7), a robot positioning plate (10) being arranged on the slider of the robot seventh axis guide rail (8), a robot seventh axis servo reduction motor (11) being arranged on the robot positioning plate (10), a drive gear (12) being fixed to the output shaft end of the reducer of the robot seventh axis servo reduction motor (11), and the drive gear (12) being meshed with the robot seventh axis rack (9) to provide active power for the welding robot and the welding gun (3); A pair of synchronously driven robot eighth-axis servo reduction motors (13) and robot eighth-axis guide slide blocks (14) are also provided on both sides of the robot seventh-axis support (7); a robot eighth-axis gear (15) is fixed to the output shaft end of the reducer of the robot eighth-axis servo reduction motor (13); and the robot eighth-axis gear (15) and the robot eighth-axis guide slide block (14) jointly provide the welding robot and the welding gun (3) with movable guidance and movable power for the eighth axis; The robot positioning plate (10) is also provided with a robot mounting seat (18) to provide a mounting base for the welding robot and the welding gun (3); The follower caliper (5) comprises a follower caliper mounting bracket (37), and also comprises a pair of parallel guide slider groups (38) arranged thereon; the follower caliper mounting bracket (37) is fixedly connected with a pair of bracket reinforcing ribs (39) and a cylinder flange plate (40) to form a box-like shape; a lifting cylinder (41) and a lifting slide plate (42) are arranged inside the box; the lifting cylinder (41) is connected to the follower caliper mounting bracket (37); the lifting slide plate (42) is connected to the cylinder flange plate (40); a follower positioning plate (43) is also arranged on the top of the lifting slide plate (42); the follower positioning plate (43) is provided with a three-way positioning positioning clamp 1 (44), a positioning clamp 2 (45) and a slideway groove plate (46); The bottom of the lifting cylinder (41) is connected and fixed to the follower caliper mounting bracket (37), and the telescopic cylinder rod of the lifting cylinder (41) is connected and fixed to the lifting slide plate (42), so as to play the role of positioning the follower caliper on the gooseneck flange; The positioning clamp 1 (44), the positioning clamp 2 (45) and the slideway groove plate (46) are fixed together on the follower positioning plate, and the positioning spacing of the positioning clamp 1 (44) and the positioning clamp 2 (45) can be quickly replaced according to the size of the gooseneck flange; The seventh axis of the robot's external axis (2) ensures the equidistant welding accuracy between the unit plate of the plate-type radiator and the oil collecting pipe; The centering slide and the eighth axis of the robot's external axis share the same guide track; A welding robot (19) is fixed on a robot mounting seat (18); a welding gun collision preventer (20) is arranged on the sixth axis of the welding robot (19); a welding gun transfer bracket (21) is arranged on the movable end of the welding gun collision preventer (20); a circular flange adjustment end of the welding gun transfer bracket (21) is fixedly connected to a circular flange adjustment end of a welding gun transfer bracket (22); the two sets of circular flange adjustment ends can be manually / automatically adjusted according to different welding angles; and a pair of oil collecting pipe welding guns (23) placed in parallel are arranged at the end of an L-shaped grid frame of the welding gun transfer bracket (22).

2. According to claim 1, the flexible assembly welding workstation for transformer plate heat sink, the production method of the flexible assembly welding workstation for transformer plate heat sink comprises the following steps: 1) Receive welding processing information of the plate radiator model and the corresponding oil collecting pipe model from the system; 2) Automatically / manually adjust the starting position of the centering slide (4), the welding robot and the welding gun (3); 3) The plate-type heat sink is transported to the positioning comb plate (6) by an external transport mechanism; 4) The centering slide (4) uses the internal oil collecting pipe positioning groove to position and clamp the plate-type radiator; 5) The robot's external axis (2) moves to the starting welding position according to the fin heat sink model; 6) The welding robot and welding gun (3) call the corresponding welding path program according to the plate radiator model; 7) After the welding robot completes the welding of the oil collecting pipe, the external conveying device transports the plate radiator to the next process step; 8) Repeat the above steps 1) to 7) to complete the welding work of the next corresponding model of fin heat sink.

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