A welding device for motor housing machining

Abstract

The application belongs to the technical field of motor processing, and specifically discloses a welding device for motor shell processing, which comprises a positioning assembly, a grabbing and placing assembly, a feeding assembly and a welding assembly. The positioning assembly comprises a first supporting assembly and a self-centering rotating assembly. The first supporting assembly is arranged on the ground, and the self-centering rotating assembly is arranged on the first supporting assembly. A motor shell is sleeved on the self-centering rotating assembly. The grabbing and placing assembly comprises a second supporting assembly, a track assembly, a steering assembly, a swinging assembly, an electromagnet and a gasket. The second supporting assembly is arranged on the ground, the track assembly is arranged on the second supporting assembly, the steering assembly is arranged on the inner side of the track assembly, the swinging assembly is arranged on the steering assembly, the electromagnet is arranged on the swinging assembly, and the gasket is arranged on the electromagnet. The application has a simple structure and is easy to maintain. Through the adoption of automatic and accurate positioning technology, the automatic taking, accurate placing and automatic welding of the heat dissipation fins are realized, and manual intervention is not needed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of motor processing, and particularly relates to a welding device for motor shell processing. BACKGROUND

[0002] As a core driving component in the field of modern industry, motors are widely used in various devices and systems. As an important part of the motor, the motor shell not only plays a role in supporting, fixing and protecting the internal components of the motor, but also directly affects the heat dissipation performance, mechanical strength and overall operation stability of the motor. The manufacturing process of the motor shell is directly related to the overall performance and service life of the motor.

[0003] Among them, the manufacturing of the most common steel motor shell usually involves the following key steps: first, the steel plate is processed into a cylindrical shape through a roll forming process; then, the longitudinal joint of the cylinder is longitudinally welded to form a closed shell; finally, in order to improve the heat dissipation efficiency of the motor, a large number of heat dissipation fins need to be welded on the outer surface of the shell. The main function of the heat dissipation fin is to increase the contact area with the surrounding air, accelerate the conduction and convection of heat, thereby effectively reducing the temperature of the motor during operation, preventing the performance degradation, service life shortening and even damage of the motor due to overheating. At present, the welding of the motor shell heat dissipation fin mainly adopts the following two ways: manual welding, the worker holds the heat dissipation fin and adopts manual arc welding or gas shielded welding to perform double-sided welding on the outer surface of the motor shell. Automatic welding, using a special welding robot or automatic welding equipment, the heat dissipation fin is automatically positioned and welded through pre-programming. However, the above two existing technologies have obvious defects:

[0004] The quality of manual welding is highly dependent on the skill level and experience of the welder. There may be large differences in welding quality between different welders, or even the same welder at different times or in different states. It is easy to have uneven welds, incomplete penetration, undercut and other welding defects. Manual welding is slow and labor-intensive, and it is difficult to meet the needs of large-scale production, especially when welding densely arranged heat dissipation fins, the worker needs to frequently adjust the posture and position, and the efficiency is lower.

[0005] While automated welding overcomes some of the shortcomings of manual welding, it still faces significant technical challenges and limitations. To achieve efficient heat dissipation, the heat sinks on motor housings are typically very densely packed. Automated welding equipment needs to precisely grasp, position, and place each heat sink within a very small space. This places extremely high demands on the precision, repeatability, and resolution and algorithms of the robotic arm and the vision recognition system. Even slight deviations can lead to misaligned or colliding heat sinks, or even damage to the heat sinks or the motor housing. Simultaneously, the densely arranged heat sinks pose significant challenges to the motion path planning of automated equipment. The robotic arm and gripper must avoid collisions with already welded heat sinks during movement. Furthermore, achieving high-precision, high-reliability automated welding typically requires high-performance robotic arms, vision systems, sensors, and control systems. This significantly increases the complexity and cost of the equipment, as well as the difficulty and cost of maintenance. Summary of the Invention

[0006] In view of the above situation, the present invention provides a welding device for processing motor housing. The device has a simple structure and is easy to maintain. By adopting automated precision positioning technology, it realizes automatic material picking and precise placement of heat sinks without manual intervention, effectively avoiding collision interference during the welding process and improving welding efficiency.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a welding device for processing motor housing, including a positioning component, a gripping and placing component, a feeding component and a welding component. The feeding component is located between the positioning component and the gripping and placing component, and the welding component is located above the gripping and placing component and faces the positioning component.

[0008] Furthermore, the positioning component includes a first support component and a self-centering rotation component. The first support component is disposed on the ground, and the self-centering rotation component is disposed on the first support component. A motor housing is fitted onto the self-centering rotation component.

[0009] Furthermore, the grasping and placing assembly includes a second support assembly, a track assembly, a steering assembly, a swing assembly, an electromagnet, and a pad. The second support assembly is located on the ground, the track assembly is located on the second support assembly, the steering assembly is located inside the track assembly, the swing assembly is located on the steering assembly, the electromagnet is located on the swing assembly, and the pad is located on the electromagnet.

[0010] Further, the track assembly comprises a fixed seat, an arc-shaped sliding slot, a horizontal sliding slot and a vertical sliding slot, the fixed seat is symmetrically arranged at two ends of the second support assembly, the distance between the two fixed seats is greater than the length of the motor shell, the arc-shaped sliding slot is arranged on the fixed seat, the arc of the arc-shaped sliding slot is 90 degrees, the arc-shaped sliding slot is in the third quadrant relative to its center, and the horizontal sliding slot and the vertical sliding slot are respectively arranged at the upper and lower ends of the arc-shaped sliding slot.

[0011] Further, the turning assembly comprises a rotating shaft, a rotating rod, a through slot and a clamping slot, the rotating shaft is vertically and rotatably arranged on the fixed seat, the rotating shaft is concentric with the arc-shaped sliding slot, the rotating rod is vertically arranged at one end of the rotating shaft, the through slot vertically penetrates the rotating rod at a position on the side of the rotating shaft, and the clamping slot is arranged on both sides of the through slot.

[0012] Further, the swinging assembly comprises a sliding shaft, a swing arm and a driving shaft, the sliding shaft is vertically and slidably arranged in the horizontal sliding slot, the arc-shaped sliding slot and the vertical sliding slot, the swing arm is slidably arranged in the clamping slot, the sliding shaft and the swing arm are vertically arranged, the driving shaft is vertically arranged on the swing arm, the driving shaft and the sliding shaft are coaxially arranged on both sides of the swing arm, and the sliding shaft and the driving shaft penetrate the through slot, the swing arm points to the motor shell when the sliding shaft is located in the horizontal sliding slot.

[0013] Further, the grabbing and placing assembly further comprises a hydraulic cylinder and a controller, the cylinder end of the hydraulic cylinder is rotatably connected with the second support assembly, the piston rod end of the hydraulic cylinder is provided with a connecting piece, the connecting piece is rotatably connected with the driving shaft, a tension and pressure sensor is arranged between the piston rod end of the hydraulic cylinder and the connecting piece, and the controller is arranged on the electromagnet.

[0014] Further, the feeding assembly comprises a third support assembly, a storage box and a sliding column, the third support assembly is arranged on the ground, the storage box is horizontally arranged on one side of the third support assembly, the lower wall of the open end of the storage box is provided with a support strip, the lower side of the storage box is provided with an L-shaped plate, the sliding column vertically penetrates the L-shaped plate, the sliding column is provided in plurality, the sliding column is in close contact with the support strip, a compression spring is arranged in the storage box on the third support assembly, one end of the compression spring is provided with a push plate, a plurality of cooling fins are arranged on one side of the push plate, the cooling fins are in close contact with the storage box, the length of the cooling fins is equal to the length of the motor shell, the thickness of the cooling fins is equal to the thickness of the support strip, a spring seat is arranged at the lower end of the sliding column, a tension spring is arranged between the spring seat and the L-shaped plate, and the tension spring is sleeved outside the sliding column.

[0015] Further, the electromagnet is arranged between the two swing arms, the electromagnet is composed of two sections with an L-shaped cross section, the cross section of the electromagnet and the gasket is also L-shaped, and the sum of the thickness of one section of the electromagnet and the cooling fins is equal to the thickness of the other section of the electromagnet.

[0016] Further, the hydraulic cylinder is shortened to the shortest time when the sliding shaft is located in the vertical sliding groove and the gasket presses the sliding column, at this time the heat sink above the support bar is completely resisted by the notch of the electromagnet, the hydraulic cylinder is elongated to the maximum time when the sliding shaft is located in the horizontal sliding groove and the gasket presses the motor shell, at this time the heat sink attracted by the electromagnet is located above the electromagnet and is spaced from the motor shell.

[0017] Further, the welding assembly comprises a translation assembly and a welding gun, the translation assembly is arranged above the ground, the reciprocating translation direction of the translation assembly is the same as the axial direction of the motor shell, and the welding gun is arranged on the translation seat of the translation assembly.

[0018] Further, when the tension and pressure sensor just detects the pressure, a signal is transmitted to the controller to keep the power supply of the electromagnet on, when the tension and pressure sensor just detects the tension, a signal is transmitted to the controller to keep the power supply of the electromagnet off, the single rotation direction of the self-centering rotation assembly can make the just-welded heat sink move upward, the self-centering rotation assembly rotates by a preset angle and stops, then the hydraulic cylinder changes from the shortest to the longest, then the welding gun moves from one end to the other end of the motor shell and further away, then the hydraulic cylinder changes from the longest to the shortest, and then the self-centering rotation assembly rotates again.

[0019] The beneficial effects achieved by the above structure are as follows:

[0020] (1) The automatic precise positioning technology is adopted in the present application, the gap between the heat sink and the motor shell is accurately controlled through the cooperation of the electromagnet and the gasket, the defects such as uneven weld, incomplete penetration and undercutting caused by skill difference and fatigue of welders in manual welding are avoided, at the same time, the stability and consistency of the welding parameters are ensured in the automatic welding process, thereby the welding quality and the consistency of products are significantly improved.

[0021] (2) The present application realizes automatic material taking, accurate placement and automatic welding of the heat sink, without manual intervention, the feeding assembly automatically supplies the heat sink, the grabbing and placing assembly quickly and accurately places the heat sink to the specified position through the cooperation of the track assembly, the steering assembly, the swing assembly and the electromagnet, the welding assembly automatically completes the welding, the whole process has high automation degree and fast welding speed, the labor intensity of workers is greatly reduced, the production efficiency is improved, and it is especially suitable for large-scale production.

[0022] (3) Through the ingenious mechanical structure design, especially the combination of the track assembly, the steering assembly and the swing assembly, the electromagnet can flexibly move between the densely arranged heat sinks, collision interference is avoided, the movement of the sliding shaft in the arc-shaped sliding groove, the horizontal sliding groove and the vertical sliding groove realizes the accurate movement of the electromagnet in different directions, and ensures that each heat sink can be accurately grabbed and placed.

[0023] (4) Compared with the automatic welding device using high-performance mechanical arm, complex vision system and sensor, the application has simple structure, mainly uses relatively simple mechanical parts such as hydraulic cylinder, electromagnet and track assembly, and the control system is relatively simple, which reduces the complexity and manufacturing cost of the device, and also reduces the maintenance difficulty and cost.

[0024] (5) The hydraulic cylinder and the tension and pressure sensor realize precise linkage control, the tension and pressure sensor can monitor the stress in real time, when the hydraulic cylinder is elongated or shortened, the tension and pressure sensor detects the pressure or tension signal respectively, and immediately transmits these signals to the controller, automatically controls the opening or closing of the electromagnet power supply, so as to realize the automatic adsorption and separation of the cooling fin, this highly integrated linkage mode does not need complex logic judgment and additional control link, simplifies the control system, improves the response speed and reliability, and further improves the automation level and integration of the whole device.

[0025] (6) The device provides high adaptive conditions for single-sided welding double-sided forming technology through the special design of electromagnet and gasket and precise motion control, the welding gun moves along the groove during welding, and the single-sided welding double-sided forming technology is used to realize good forming of the weld on both sides of the motor shell and the cooling fin, without turning over the motor shell or double-sided welding, which not only simplifies the welding process, but also greatly improves the welding efficiency and welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a first three-dimensional structure schematic diagram of a welding device for motor shell machining proposed by the application.

[0027] Figure 2 It is a second three-dimensional structure schematic diagram of a welding device for motor shell machining proposed by the application.

[0028] Figure 3 It is a side view of a welding device for motor shell machining proposed by the application.

[0029] Figure 4 It is a structure schematic diagram of the position relationship between the cooling fin and the storage box of a welding device for motor shell machining proposed by the application.

[0030] Figure 5 It is an explosion structure schematic diagram of a grabbing and placing assembly of a welding device for motor shell machining proposed by the application.

[0031] Figure 6 It is Figure 3 A portion of the enlarged view.

[0032] Figure 7An explosion structure schematic view of a feeding assembly of a welding device for motor shell processing is provided.

[0033] Figure 8 A working schematic view of the welding device for motor shell processing when grabbing the heat dissipation sheet is provided.

[0034] Figure 9 A working schematic view of the welding device for motor shell processing when placing the heat dissipation sheet is provided.

[0035] Figure 10 For Figure 8 The middle B part is enlarged.

[0036] 1, positioning assembly, 11, first support assembly, 12, self-centering rotation assembly, 2, grabbing and placing assembly, 21, second support assembly, 22, track assembly, 221, arc-shaped sliding groove, 222, horizontal sliding groove, 223, vertical sliding groove, 224, fixed seat, 23, turning assembly, 231, rotating shaft, 232, rotating rod, 233, clamping groove, 234, through groove, 24, swinging assembly, 241, sliding shaft, 242, driving shaft, 243, swing arm, 25, electromagnet, 26, gasket, 27, tension and pressure sensor, 28, controller, 29, hydraulic cylinder, 291, connecting piece, 3, feeding assembly, 31, third support assembly, 32, storage box, 321, support strip, 322, L-shaped plate, 33, sliding column, 34, spring seat, 35, tension spring, 36, push plate, 37, compression spring, 38, heat dissipation sheet, 4, welding assembly, 41, translation assembly, 42, welding gun, 5, motor shell.

[0037] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The present application proposes a welding device for motor shell 5 body processing, which comprises a positioning assembly 1, a grabbing and placing assembly 2, a feeding assembly 3 and a welding assembly 4. The feeding assembly 3 is arranged between the positioning assembly 1 and the grabbing and placing assembly 2, and the welding assembly 4 is located above the grabbing and placing assembly 2 and faces the positioning assembly 1.

[0041] Through the ingenious design of mechanical structure and control logic, the whole process automation of the cooling fin 38 from feeding, grabbing, positioning to welding is realized, and each component works cooperatively to complete the welding task.

[0042] The positioning assembly 1 comprises a first support assembly 11 and a self-centering rotating assembly 12. The first support assembly 11 is arranged on the ground, and the self-centering rotating assembly 12 is arranged on the first support assembly 11. The motor shell 5 is sleeved on the self-centering rotating assembly 12.

[0043] The self-centering rotating assembly 12 is used for clamping and rotating the motor shell 5. It can be a self-centering chuck composed of three or more support members which can be radially expanded and moved. By synchronously driving the extension and retraction of these support members, automatic centering and fixing of motor shells 5 of different diameters are realized. At the same time, the self-centering rotating assembly 12 also contains a driving mechanism (such as a stepper motor or a servo motor) and a transmission mechanism (such as a gear transmission or a synchronous belt transmission) to realize precise control of rotary motion. This is a prior art known to those skilled in the art.

[0044] The grabbing and placing assembly 2 comprises a second support assembly 21, a track assembly 22, a turning assembly 23, a swinging assembly 24, an electromagnet 25 and a gasket 26. The second support assembly 21 is arranged on the ground, the track assembly 22 is arranged on the second support assembly 21, the turning assembly 23 is arranged on the inner side of the track assembly 22, the swinging assembly 24 is arranged on the turning assembly 23, the electromagnet 25 is arranged on the swinging assembly 24, and the gasket 26 is arranged on the electromagnet 25.

[0045] The track assembly 22, the steering assembly 23 and the swing assembly 24 jointly constitute the movement path of the fin 38, the electromagnet 25 is responsible for attracting the fin 38, and the gasket 26 is responsible for single-sided welding and double-sided forming.

[0046] The track assembly 22 includes a fixed seat 224, an arc-shaped sliding groove 221, a horizontal sliding groove 222 and a vertical sliding groove 223. The fixed seat 224 is symmetrically arranged at both ends of the second support assembly 21, and the distance between the two fixed seats 224 is greater than the length of the motor shell 5. The arc-shaped sliding groove 221 is provided through the fixed seat 224. The arc of the arc-shaped sliding groove 221 is 90 degrees, and the arc-shaped sliding groove 221 is in the third quadrant relative to its center. The horizontal sliding groove 222 and the vertical sliding groove 223 are respectively provided at the upper and lower ends of the arc-shaped sliding groove 221.

[0047] The steering assembly 23 includes a rotating shaft 231, a rotating rod 232, a through groove 234 and a clamping groove 233. The rotating shaft 231 is vertically and rotatably arranged in the fixed seat 224, and the rotating shaft 231 is concentric with the arc-shaped sliding groove 221. The rotating rod 232 is vertically arranged at one end of the rotating shaft 231. The through groove 234 is vertically provided through the rotating rod 232 at the side of the rotating shaft 231. The clamping groove 233 is provided at both sides of the through groove 234.

[0048] The swing assembly 24 includes a sliding shaft 241, a swing arm 243 and a driving shaft 242. The sliding shaft 241 is vertically arranged in the horizontal sliding groove 222, the arc-shaped sliding groove 221 and the vertical sliding groove 223. The swing arm 243 is clamped and slid in the clamping groove 233. The sliding shaft 241 and the swing arm 243 are vertically arranged. The driving shaft 242 is vertically arranged on the swing arm 243. The driving shaft 242 and the sliding shaft 241 are coaxially arranged on both sides of the swing arm 243. The sliding shaft 241 and the driving shaft 242 penetrate the through groove 234. When the sliding shaft 241 is located in the horizontal sliding groove 222, the swing arm 243 points to the motor shell 5.

[0049] The track assembly 22 provides guidance and constraint for the movement of the sliding shaft 241. The fixed seat 224 fixes the entire track system. The combination of the arc-shaped sliding groove 221, the horizontal sliding groove 222 and the vertical sliding groove 223 enables the sliding shaft 241 to smoothly transition between horizontal, vertical and arc-shaped paths.

[0050] The steering assembly 23 changes the movement direction of the swing assembly 24. The rotation of the rotating shaft 231 drives the rotating rod 232 to rotate, and then controls the swing angle of the swing arm 243 through the cooperation of the through groove 234 and the clamping groove 233.

[0051] The swing assembly 24 directly controls the movement of the electromagnet 25 to realize the grabbing and placing of the heat sink 38. The slide shaft 241 moves along the track assembly 22, the swing arm 243 slides in the clamping groove 233, and the drive shaft 242 drives the movement of the swing arm 243. When the slide shaft 241 is located in the horizontal sliding groove 222, the swing arm 243 is extended, so that the electromagnet 25 is close to the motor shell 5, and is ready to place the heat sink 38.

[0052] The grabbing and placing assembly 2 further comprises a hydraulic cylinder 29 and a controller 28. The cylinder end of the hydraulic cylinder 29 is rotationally connected with the second support assembly 21. The piston rod end of the hydraulic cylinder 29 is provided with a connecting piece 291, which is rotationally connected with the drive shaft 242. The piston rod end of the hydraulic cylinder 29 and the connecting piece 291 are provided with a tension and pressure sensor 27. The controller 28 is arranged on the electromagnet 25.

[0053] The hydraulic cylinder 29 provides power for the swing assembly 24. The controller 28 controls the suction and release of the electromagnet 25 according to the signal of the tension and pressure sensor 27. The tension and pressure sensor 27 monitors the force between the piston rod of the hydraulic cylinder 29 and the connecting piece 291 in real time, and feeds back the signal to the controller 28.

[0054] The feeding assembly 3 comprises a third support assembly 31, a storage box 32 and a slide column 33. The third support assembly 31 is arranged on the ground. The storage box 32 is horizontally arranged on one side of the third support assembly 31. The open end lower wall of the storage box 32 is provided with a support strip 321. The lower side of the storage box 32 is provided with an L-shaped plate 322. The slide column 33 penetrates through the L-shaped plate 322 vertically. The slide column 33 is provided in plurality. The slide column 33 is in close contact with the support strip 321. The third support assembly 31 is provided with a compression spring 37 in the storage box 32. One end of the compression spring 37 is provided with a push plate 36. A plurality of heat sinks 38 are placed on one side of the push plate 36. The heat sinks 38 are in close contact with the storage box 32. The length of the heat sink 38 is equal to the length of the motor shell 5. The thickness of the heat sink 38 is equal to the thickness of the support strip 321. The lower end of the slide column 33 is provided with a spring seat 34. The spring seat 34 and the L-shaped plate 322 are provided with a tension spring 35. The tension spring 35 is sleeved outside the slide column 33.

[0055] The feeding assembly 3 is responsible for storing and supplying the heat sinks 38 one by one. The storage box 32 is provided with a plurality of heat sinks 38. The compression spring 37 pushes the push plate 36, so that the heat sinks 38 always maintain the tendency of extension. The slide column 33 and the support strip 321 cooperate to control the heat sinks 38 to be taken out one by one. The tension spring 35 provides the force for the reset of the slide column 33.

[0056] The electromagnet 25 is arranged between the two swing arms 243. The electromagnet 25 is composed of two sections, and the cross section is L-shaped as a whole. The cross section of the electromagnet 25 and the gasket 26 is also L-shaped. The sum of the thickness of one section of the electromagnet 25 and the heat sink 38 is equal to the thickness of the other section of the electromagnet 25.

[0057] The special shape of electromagnet 25 is designed to better adapt to the shape of heat sink 38 and the gripping requirements. The L-shaped design allows electromagnet 25 to simultaneously attract two adjacent surfaces of heat sink 38, thereby increasing the attraction force.

[0058] When hydraulic cylinder 29 is shortened to the shortest, sliding shaft 241 is located in vertical sliding groove 223 and gasket 26 presses down sliding column 33. At this time, heat sink 38 above support bar 321 is completely stopped by the gap of electromagnet 25. When hydraulic cylinder 29 is extended to the longest, sliding shaft 241 is located in horizontal sliding groove 222 and gasket 26 presses against motor shell 5. At this time, heat sink 38 attracted by electromagnet 25 is above electromagnet 25 and has a gap with motor shell 5.

[0059] The gap between heat sink 38 and motor shell 5 is also known as the bevel, which is a necessary condition for single-sided welding and double-sided forming in the prior art.

[0060] Welding assembly 4 includes translation assembly 41 and welding torch 42. Translation assembly 41 is arranged above the ground, and the reciprocating translation direction of translation assembly 41 is the same as the axial direction of motor shell 5. Welding torch 42 is arranged on the translation seat of translation assembly 41.

[0061] Welding assembly 4 is responsible for welding heat sink 38 to motor shell 5. Translation assembly 41 can be a linear module composed of a linear guide rail and a driving motor, which drives welding torch 42 to move axially along motor shell 5. Welding torch 42 can be any suitable welding torch 42, such as tungsten inert gas welding or gas metal arc welding, which are all prior art known to those skilled in the art.

[0062] When tension sensor 27 just detects the pressure, it transmits a signal to controller 28 to keep the power of electromagnet 25 on. When tension sensor 27 just detects the tension, it transmits a signal to controller 28 to keep the power of electromagnet 25 off. The single rotation direction of self-centering rotation assembly 12 can make the just-welded heat sink 38 move upward. After self-centering rotation assembly 12 rotates by a preset angle and stops, hydraulic cylinder 29 changes from the shortest to the longest. Then welding torch 42 moves from one end of motor shell 5 to the other end and further away. Then hydraulic cylinder 29 changes from the longest to the shortest. Then self-centering rotation assembly 12 rotates again.

[0063] The above is a description of the control logic of the entire welding process. The signal of tension sensor 27 controls the attraction and release of electromagnet 25. The rotation of self-centering rotation assembly 12 makes motor shell 5 rotate gradually. The extension and contraction of hydraulic cylinder 29 control the gripping, placing, and separation of heat sink 38. The movement of welding torch 42 completes the welding. Each action is coordinated to achieve automatic welding.

[0064] The specific working process is as follows:

[0065] Motor shell 5 fixation and positioning: First, the motor shell 5 to be welded is sleeved on the self-centering rotating assembly 12 of the positioning assembly 1, the self-centering rotating assembly 12 has a plurality of radially movable supporting pieces which expand outward, tightly support the motor shell 5 from the inside and automatically center, and through the limiting piece on the self-centering rotating assembly 12, it is ensured that the motor shell 5 is accurately placed in the horizontal space between the two fixed seats 224, thereby providing a stable reference for the subsequent welding operation.

[0066] Fin 38 preparation: The receiving box 32 of the feeding assembly 3 is filled with fins 38 to be welded, the compressed spring 37 in the receiving box 32 pushes the push plate 36, so that the fins 38 always have a forward tendency, the outermost fin 38 is pushed out of the receiving box 32 but is blocked by the slide column 33, ensuring that only one fin 38 is in the waiting grabbing position each time, and at this time, the support strip 321 of the lower wall of the opening end of the receiving box 32 is aligned with the fin 38, providing support for the grabbing of the electromagnet 25.

[0067] The fin 38 is grabbed and positioned: the grabbing and placing assembly 2 starts to work, the hydraulic cylinder 29 starts to shorten, and the sliding shaft 241 is driven to move by the connecting piece 291 and the driving shaft 242, and the swing arm 243 and the connecting rotating rod 232 are initially kept horizontal, when the sliding shaft 241 enters the vertical sliding groove 223 from the arc-shaped sliding groove 221, the rotating rod 232 and the swing arm 243 are turned to be vertical due to the constraint of the rotating shaft 231, the hydraulic cylinder 29 continues to shorten and drives the sliding shaft 241 to move downward, under the constraint of the rotating rod 232, the swing arm 243 is also vertically downward, so that the electromagnet 25 and the gasket 26 mounted thereon on the swing arm 243 move downward, the gasket 26 first contacts and presses the sliding column 33 downward, overcoming the tension of the tension spring 35, then the L-shaped gap part of the electromagnet 25 completely abuts against the fin 38 which has been extended into the storage box 32 and is supported by the supporting strip 321, then the hydraulic cylinder 29 starts to lengthen, at the moment when the hydraulic cylinder 29 lengthens, because the piston rod of the hydraulic cylinder 29 abuts against the connecting piece 291 to move upward, the pressure sensor 27 detects the pressure signal and transmits the signal to the controller 28, after the controller 28 receives the pressure signal, the power supply of the electromagnet 25 is immediately turned on and continuously supplied, the electromagnet 25 generates a magnetic force to firmly adsorb the fin 38, as the hydraulic cylinder 29 continues to lengthen, the fin 38 is adsorbed by the electromagnet 25 and moves upward, and is separated from the storage box 32, at the same time, the sliding column 33 is reset under the action of the tension spring 35, when the fin 38 completely leaves the storage box 32, the next fin 38 is pushed out by the push plate 36 and the compression spring 37 and is blocked by the sliding column 33 again, waiting for the next grabbing, the hydraulic cylinder 29 continues to lengthen, the sliding shaft 241 enters the horizontal sliding groove 222, at this time, the swing arm 243 moves in the horizontal direction towards the motor shell 5, and finally the gasket 26 abuts against the outer surface of the motor shell 5, because of the design of the electromagnet 25, the adsorbed fin 38 is located above the electromagnet 25 at this time, and an accurate gap is formed between the fin 38 and the motor shell 5, which is the required groove for the single-sided welding and double-sided forming process.

[0068] The fin 38 is welded: the welding assembly 4 starts to work, the welding gun 42 is driven by the translation assembly 41 to move along the axial direction of the motor shell 5 from one end to the other end, and the groove between the positioned fin 38 and the motor shell 5 is welded, the welding adopts the single-sided welding and double-sided forming technology, that is, welding is only performed on one side of the fin 38, but through the control of the welding parameters and the shape of the groove, the welding seam is well formed on both sides of the motor shell 5 and the fin 38.

[0069] The fins 38 are separated and recycled: since the welding process is carried out by moving the welding gun 42 from one end of the motor housing 5 to the other end by the translation assembly 41, it means that the welding is a non-instantaneous process, so when the welding gun 42 finishes the last point of welding at the end of the weld, the initial and intermediate sections of the weld have actually undergone sufficient natural cooling time, since the cooling and solidification process of the metal is very fast, so at the moment the command to finish the welding is given, the vast majority of the area of the entire weld has already cooled and reached a considerable mechanical strength, when the hydraulic cylinder 29 begins to retract, the magnetic force generates a pulling force on the entire fin 38, the overall bonding strength of the entire weld is sufficient to resist the initial pulling force during the separation moment of the electromagnet 25, when the hydraulic cylinder 29 begins to shorten and apply the pulling force, a very small, within the allowed range, friction displacement can occur between the fin 38 and the electromagnet 25, then the pulling force sensor 27 detects the pulling force signal and transmits it to the controller 28, after receiving the pulling force signal, the controller 28 immediately cuts off the power supply of the electromagnet 25 and keeps it off, the electromagnet 25 loses the magnetic force and separates from the welded fin 38, then the hydraulic cylinder 29 continues to shorten and prepares to grab the next fin 38, while the self-centering rotating assembly 12 rotates by a certain angle according to the preset angle, the rotation direction ensures that the just welded fin 38 moves upward to make room for the next fin 38 for welding, repeat the above steps until all the fins 38 are welded along the circumference of the motor housing 5.

[0070] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0071] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application.

[0072] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed and belong to the protection scope of the present application.

Claims

1. A welding device for motor housing machining, characterized by: The utility model provides a kind of welding machine, including positioning component (1), grab placement component (2), feed assembly (3) and welding component (4), the feed assembly (3) is located between positioning component (1) and grab placement component (2), the welding component (4) is above grab placement component (2) and faces positioning component (1); The positioning component (1) includes first support component (11) and self-centering rotating component (12), the first support component (11) is arranged on the ground, the self-centering rotating component (12) is arranged on the first support component (11), and the motor shell (5) is sleeved on the self-centering rotating component (12); The grab placement component (2) includes second support component (21), track component (22), steering component (23), swing component (24), electromagnet (25) and gasket (26), the second support component (21) is arranged on the ground, the steering component (23) is arranged on the inner side of the track component (22), and the gasket (26) is arranged on the electromagnet (25); The track component (22) includes fixed seat (224), arc-shaped sliding groove (221), horizontal sliding groove (222) and vertical sliding groove (223), the fixed seat (224) is provided with two, the two fixed seats (224) are symmetrically arranged at the two ends of the second support component (21), and the distance between the two fixed seats (224) is greater than the length of the motor shell (5), the arc-shaped sliding groove (221) is provided on the fixed seat (224), the arc of the arc-shaped sliding groove (221) is 90 degrees, the arc-shaped sliding groove (221) is in the third quadrant with respect to its center, and the horizontal sliding groove (222) and the vertical sliding groove (223) are respectively provided on the upper and lower ends of the arc-shaped sliding groove (221); The steering component (23) includes shaft (231), rotating rod (232), through slot (234) and clamping groove (233), the shaft (231) is vertically and rotatably arranged in the fixed seat (224), the shaft (231) is concentric with the arc-shaped sliding groove (221), the rotating rod (232) is vertically arranged at one end of the shaft (231), the through slot (234) is vertically provided through the part of the rotating rod (232) away from the shaft (231), and the clamping groove (233) is provided on the upper and lower sides of the through slot (234). The swing assembly (24) comprises a sliding shaft (241), a swing arm (243) and a driving shaft (242), the sliding shaft (241) is vertically matched and slid in a horizontal sliding groove (222), an arc-shaped sliding groove (221) and a vertical sliding groove (223), the swing arm (243) is engaged and slid in a clamping groove (233), the sliding shaft (241) and the swing arm (243) are vertically arranged, the driving shaft (242) is vertically arranged on the swing arm (243), the driving shaft (242) and the sliding shaft (241) are coaxially arranged on the two sides of the swing arm (243), the sliding shaft (241) and the driving shaft (242) all penetrate through a through groove (234), when the sliding shaft (241) is located in the horizontal sliding groove (222), the swing arm (243) points to the motor shell (5), and the electromagnet (25) is arranged between the two swing arms (243). The grabbing and placing assembly (2) further comprises a hydraulic cylinder (29), a cylinder end of the hydraulic cylinder (29) is rotationally connected with the second supporting assembly (21), a piston rod end of the hydraulic cylinder (29) is provided with a connecting piece (291), and the connecting piece (291) is rotationally connected with the driving shaft (242). The feeding assembly (3) comprises a third supporting assembly (31), a storage box (32) and a sliding column (33), the third supporting assembly (31) is arranged on the ground, the storage box (32) is horizontally arranged on one side of the third supporting assembly (31), an open end lower wall of the storage box (32) is provided with a supporting strip (321), a lower side of the storage box (32) is provided with an L-shaped plate (322), the sliding column (33) penetrates through the L-shaped plate (322) vertically, the sliding column (33) is provided in plurality, the sliding column (33) is tightly attached to the supporting strip (321), the third supporting assembly (31) is provided with a compression spring (37) in the storage box (32), one end of the compression spring (37) is provided with a push plate (36), a plurality of cooling fins (38) are arranged on one side of the push plate (36), the cooling fins (38) are tightly attached in the storage box (32), a lower end of the sliding column (33) is provided with a spring seat (34), a tension spring (35) is arranged between the spring seat (34) and the L-shaped plate (322), and the tension spring (35) is sleeved outside the sliding column (33).

2. A welding device for motor housing machining according to claim 1, characterized in that: The grabbing and placing assembly (2) further comprises a controller (28), and a tension and pressure sensor (27) is arranged between the piston rod end of the hydraulic cylinder (29) and the connecting piece (291).

3. A welding device for motor housing machining according to claim 2, characterized in that: The length of the cooling fin (38) is equal to the length of the motor shell (5), and the thickness of the cooling fin (38) is equal to the thickness of the supporting strip (321).

4. A welding device for motor housing machining according to claim 3, characterized in that: The electromagnet (25) is composed of two sections and has an L-shaped cross section, the cross section of the electromagnet (25) and the gasket (26) also has an L shape, and the sum of the thickness of one section of the electromagnet (25) and the cooling fin (38) is equal to the thickness of the other section of the electromagnet (25).

5. A welding device for motor housing machining according to claim 4, characterized in that: When the hydraulic cylinder (29) is shortened to the shortest, the sliding shaft (241) is located in the vertical sliding groove (223) and the gasket (26) presses the slide post (33), at this time the heat sink (38) above the support strip (321) is completely stopped by the gap of the electromagnet (25), when the hydraulic cylinder (29) is extended to the longest, the sliding shaft (241) is located in the horizontal sliding groove (222) and the gasket (26) is stopped by the motor shell (5), at this time the heat sink (38) attracted by the electromagnet (25) is above the electromagnet (25) and is spaced from the motor shell (5).

6. A welding device for motor housing machining according to claim 5, characterized in that: The welding assembly (4) comprises a translation assembly (41) and a welding gun (42), the translation assembly (41) is arranged above the ground, the reciprocating translation direction of the translation assembly (41) is the same as the axis direction of the motor shell (5), and the welding gun (42) is arranged on the translation seat of the translation assembly (41).

7. A welding device for motor housing machining according to claim 6, characterized in that: When the tension sensor (27) just detects the pressure, the signal is transmitted to the controller (28) to keep the power supply of the electromagnet (25) on, when the tension sensor (27) just detects the tension, the signal is transmitted to the controller (28) to keep the power supply of the electromagnet (25) off, the single rotation direction of the self-centering rotation assembly (12) can make the just welded heat sink (38) move upward, the self-centering rotation assembly (12) rotates by a preset angle and stops, then the hydraulic cylinder (29) changes from the shortest to the longest, then the welding gun (42) moves from one end of the motor shell (5) to the other end and further away, then the hydraulic cylinder (29) changes from the longest to the shortest, then the self-centering rotation assembly (12) rotates again.

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