Welding device for motor shell machining

Abstract

The invention belongs to the technical field of motor machining, and particularly discloses a welding device for motor shell machining, 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, and the first supporting assembly is arranged on the ground; the self-centering rotating assembly is arranged on the first supporting assembly, the self-centering rotating assembly is sleeved with a motor shell, the grabbing and placing assembly comprises a second supporting assembly, a rail assembly, a steering assembly, a swing assembly, an electromagnet and a liner, the second supporting assembly is arranged on the ground, the rail assembly is arranged on the second supporting assembly, the steering assembly is arranged on the inner side of the rail assembly, and the electromagnet is arranged on the inner side of the swing assembly. The swing assembly is arranged on the steering assembly, the electromagnet is arranged on the swing assembly, and the gasket is arranged on the electromagnet. The cooling fin welding device is simple in structure and easy to maintain, automatic taking, accurate placing and automatic welding of cooling fins are achieved through the automatic accurate positioning technology, and manual intervention is not needed.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor processing, and in particular relates to a welding device for processing a motor housing. Background Art

[0002] As a core drive component in modern industry, motors are widely used in a variety of equipment and systems. The motor housing, a crucial component of the motor, not only supports, secures, and protects the motor's internal components but also directly impacts the motor's heat dissipation, mechanical strength, and overall operational stability. The quality of the motor housing's manufacturing process is directly related to the motor's overall performance and service life.

[0003] The manufacture of the most common steel motor housing usually involves the following key steps: first, the steel plate is processed into a cylindrical shape through a roll-bending process; then the longitudinal seams of the cylinder are longitudinally welded to form a closed housing; finally, in order to improve the heat dissipation efficiency of the motor, a large number of heat sinks need to be welded on the outer surface of the housing. The main function of the heat sink is to accelerate the conduction and convection of heat by increasing the contact area with the surrounding air, thereby effectively reducing the temperature of the motor during operation and preventing the motor from overheating and causing performance degradation, shortening of life, or even damage. At present, the welding of heat sinks of motor housings mainly adopts the following two methods: manual welding, in which workers hold the heat sink and use manual arc welding or gas shielded welding to perform double-sided welding on the outer surface of the motor housing. Automated welding, using a dedicated welding robot or automated welding equipment, automatically positions and welds the heat sink through pre-programming. However, both of the above-mentioned existing technologies have obvious defects: The quality of manual welding is highly dependent on the welder's skill and experience. Welding quality can vary significantly between welders, and even between the same welder at different times and under different conditions. Welding defects such as uneven welds, incomplete penetration, and undercuts are common. Manual welding is slow and labor-intensive, making it difficult to meet the demands of large-scale production. This is especially true when welding densely packed heat sinks, as workers frequently adjust their posture and position, reducing efficiency.

[0004] Although automated welding has overcome the shortcomings of manual welding to a certain extent, it still faces huge technical challenges and limitations: in order to achieve efficient heat dissipation, the heat sinks on the motor housing are usually very dense, and automated welding equipment needs to accurately grasp, position and place each heat sink in an extremely small space. This places extremely high demands on the accuracy and repeatability of the robotic arm, as well as the resolution and algorithm of the visual recognition system. A slight deviation may cause the heat sink to be placed crookedly, collide, or even damage the heat sink or motor housing; at the same time, the densely arranged heat sinks pose great difficulties for the motion path planning of the automated equipment. The robotic arm and fixture need to avoid collision with the welded heat sinks during movement; in order to achieve high-precision and high-reliability automated welding, high-performance robotic arms, vision systems, sensors and control systems are usually required, which will significantly increase the complexity and cost of the equipment, as well as the difficulty and cost of maintenance. Summary of the Invention

[0005] In response to the above situation, the present invention provides a welding device for motor housing processing. The device has a simple structure and is easy to maintain. By adopting automated precise positioning technology, it can realize automatic material collection and precise placement of heat sinks without manual intervention, effectively avoiding collision and interference during the welding process and improving welding efficiency.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a welding device for motor housing processing, including a positioning component, a grabbing and placing component, a feeding component and a welding component, the feeding component is arranged between the positioning component and the grabbing and placing component, and the welding component is located above the grabbing and placing component and faces the positioning component.

[0007] Furthermore, the positioning assembly includes a first supporting assembly and a self-centering rotating assembly, the first supporting assembly is arranged on the ground, the self-centering rotating assembly is arranged on the first supporting assembly, and the self-centering rotating assembly is sleeved with a motor housing.

[0008] Furthermore, the grabbing 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 arranged on the ground, the track assembly is arranged on the second support assembly, the steering assembly is arranged on the inner side of the track assembly, the swing assembly is arranged on the steering assembly, the electromagnet is arranged on the swing assembly, and the pad is arranged on the electromagnet.

[0009] Furthermore, the track assembly includes a fixed seat, an arc-shaped slide groove, a horizontal slide groove and a vertical slide groove. The fixed seats are symmetrically arranged at both ends of the second support assembly. The distance between the two fixed seats is greater than the length of the motor housing. The arc-shaped slide groove is opened through the fixed seat. The arc of the arc-shaped slide groove is 90 degrees. The arc-shaped slide groove is in the third quadrant relative to its center of the circle. The horizontal slide groove and the vertical slide groove are respectively connected to the upper and lower ends of the arc-shaped slide groove.

[0010] Furthermore, the steering assembly includes a rotating shaft, a rotating rod, a through slot and a clamping slot. The rotating shaft is vertically engaged and rotatable on a fixed seat. The rotating shaft is concentric with the arc-shaped slide slot. The rotating rod is vertically arranged at one end of the rotating shaft. The through slot vertically penetrates the portion of the rotating rod located on one side of the rotating shaft. The clamping slot is connected and arranged on both sides of the through slot.

[0011] Furthermore, the swing assembly includes a sliding shaft, a swing arm, and a drive shaft. The sliding shaft slides vertically in the horizontal slide groove, the arc slide groove and the vertical slide groove. The swing arm slides in the card groove. The sliding shaft and the swing arm are vertically arranged. The drive shaft is vertically arranged on the swing arm. The drive shaft and the sliding shaft are arranged on both sides of the swing arm and are coaxially arranged. The sliding shaft and the drive shaft both pass through the through groove. When the sliding shaft is in the horizontal slide groove, the swing arm points to the motor housing.

[0012] Furthermore, the grabbing and placing assembly also includes a hydraulic cylinder and a controller, the cylinder end of the hydraulic cylinder is rotatably connected to the second support assembly, the piston rod end of the hydraulic cylinder is provided with a connecting piece, the connecting piece is rotatably connected to the drive shaft, a tension and pressure sensor is provided between the piston rod end of the hydraulic cylinder and the connecting piece, and the controller is arranged on the electromagnet.

[0013] Furthermore, the feeding assembly includes a third support assembly, a storage box and a sliding column. The third support assembly is arranged on the ground, and 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 bar, and the lower side of the storage box is provided with an L-shaped plate. The sliding column vertically passes through the L-shaped plate, and the sliding column is provided with multiple slide columns. The sliding column is tightly attached to the support bar. A compression spring is provided in the storage box on the third support assembly, and a push plate is provided at one end of the compression spring. A plurality of heat sinks are placed on one side of the push plate, and the heat sink is tightly attached to the storage box. The length of the heat sink is equal to the length of the motor housing, and the thickness of the heat sink is equal to the thickness of the support bar. A spring seat is provided at the lower end of the slide column, and a tension spring is provided between the spring seat and the L-shaped plate, and the tension spring is sleeved on the outside of the slide column.

[0014] Furthermore, the electromagnet is arranged between two swing arms, and the electromagnet is composed of two sections with an L-shaped cross-section. The cross-section of the electromagnet and the gasket also forms an L-shape, and the sum of the thickness of one section of the electromagnet and the heat sink is equal to the thickness of the other section of the electromagnet.

[0015] Furthermore, when the hydraulic cylinder is shortened to the minimum, the sliding shaft is located in the vertical slide groove and the gasket presses down the slide column. At this time, the heat sink located above the support bar is completely supported by the notch of the electromagnet. When the hydraulic cylinder is extended to the maximum, the sliding shaft is located in the horizontal slide groove and the gasket supports the motor housing. At this time, the heat sink attracted by the electromagnet is located above the electromagnet and is spaced apart from the motor housing.

[0016] Furthermore, the welding assembly includes 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 housing. The welding gun is arranged on the translation seat of the translation assembly.

[0017] Furthermore, when the tension pressure sensor just detects pressure, it transmits a signal to the controller to keep the power of the electromagnet on; when the tension pressure sensor just detects tension, it transmits a signal to the controller to keep the power of the electromagnet off. The single rotation direction of the self-centering rotating assembly can make the heat sink that has just been welded move upward. After the self-centering rotating assembly rotates a preset angle and stops, the hydraulic cylinder changes from the shortest to the longest, and then the welding gun moves from one end of the motor housing to the other end and further away, and then the hydraulic cylinder changes from the longest to the shortest, and then the self-centering rotating assembly rotates again.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The present invention adopts automated precise positioning technology to precisely control the gap groove between the heat sink and the motor housing through the cooperation of electromagnets and gaskets, thereby avoiding defects such as uneven welds, incomplete welds, and undercuts caused by differences in welder skills and fatigue during manual welding. At the same time, the automated welding process ensures the stability and consistency of welding parameters, thereby significantly improving welding quality and product consistency.

[0019] (2) The present invention realizes automatic material picking, precise placement and automatic welding of heat sinks without manual intervention. The feeding component automatically supplies the heat sinks. The grabbing and placing component quickly and accurately places the heat sinks in the designated position through the coordinated action of the track component, the steering component, the swing component and the electromagnet. The welding component automatically completes the welding. The whole process has a high degree of automation and a fast welding speed, which greatly reduces the labor intensity of workers and improves production efficiency. It is particularly suitable for large-scale production.

[0020] (3) The present invention uses an ingenious mechanical structure design, especially the combination of the track assembly, the steering assembly and the swing assembly, so that the electromagnet can move flexibly between the densely arranged heat sinks, avoiding collision interference. The movement of the slide shaft in the arc-shaped slide groove, the horizontal slide groove and the vertical slide groove realizes the precise movement of the electromagnet in different directions, ensuring that each heat sink can be accurately grasped and placed.

[0021] (4) Compared with automated welding equipment that uses high-performance robotic arms, complex visual systems, and sensors, the present invention has a streamlined structure and mainly uses relatively simple mechanical components such as hydraulic cylinders, electromagnets, and track assemblies. The control system is also relatively simple, which reduces the complexity and manufacturing cost of the equipment, and also reduces the difficulty and cost of maintenance.

[0022] (5) The hydraulic cylinder and the tension and pressure sensors realize precise linkage control. The tension and pressure sensors can monitor the stress conditions in real time. When the hydraulic cylinder is extended or shortened, the tension and pressure sensors detect the pressure or tension signals respectively and transmit these signals to the controller immediately to automatically control the opening or closing of the electromagnet power supply, thereby realizing the automatic adsorption and detachment of the heat sink. This highly integrated linkage mode does not require complex logical judgment and additional control links, simplifies the control system, improves the response speed and reliability, and further enhances the automation level and integration of the entire device.

[0023] (6) Through the special design of the electromagnet and the gasket, as well as the precise motion control, this device forms a stable groove between the heat sink and the motor housing, providing highly adaptable conditions for the single-sided welding and double-sided forming technology. During welding, the welding gun moves along the groove, and the single-sided welding and double-sided forming technology is used to achieve good forming of the weld on both sides of the motor housing and the heat sink. There is no need to flip the motor housing or perform double-sided welding. This not only simplifies the welding process, but also greatly improves the welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first three-dimensional structural schematic diagram of a welding device for motor housing processing proposed by the present invention.

[0025] Figure 2 This is a second three-dimensional structural schematic diagram of a welding device for motor housing processing proposed by the present invention.

[0026] Figure 3 This is a side view of a welding device for machining motor housings proposed by the present invention.

[0027] Figure 4 This is a structural schematic diagram of the positional relationship between the heat sink and the storage box of a welding device for motor housing processing proposed by the present invention.

[0028] Figure 5 This is a schematic diagram of the exploded structure of a grabbing and placing assembly of a welding device for motor housing processing proposed by the present invention.

[0029] Figure 6 for Figure 3 Enlarged view of part A.

[0030] Figure 7This is a schematic diagram of the exploded structure of a feeding assembly of a welding device for machining motor housings proposed by the present invention.

[0031] Figure 8 This is a schematic diagram of the operation of a welding device for motor housing processing proposed by the present invention when grabbing a heat sink.

[0032] Figure 9 This is a working schematic diagram of a welding device for motor housing processing proposed by the present invention when placing heat sinks.

[0033] Figure 10 for Figure 8 Enlarged view of part B.

[0034] Among them, 1. Positioning component, 11. First support component, 12. Self-centering rotation component, 2. Grasping and placing component, 21. Second support component, 22. Track component, 221. Arc slide, 222. Horizontal slide, 223. Vertical slide, 224. Fixed seat, 23. Steering component, 231. Rotating shaft, 232. Rotating rod, 233. Card slot, 234. Through slot, 24. Swinging component, 241. Sliding shaft, 242. Drive shaft, 243. Swing arm, 25. Electromagnet, 26. Gasket, 27. Tension and pressure sensor, 28. Controller, 29. Hydraulic cylinder, 291. Connector, 3. Feeding assembly, 31. Third support assembly, 32. Storage box, 321. Support bar, 322. L-shaped plate, 33. Sliding column, 34. Spring seat, 35. Tension spring, 36. Push plate, 37. Compression spring, 38. Heat sink, 4. Welding assembly, 41. Translation assembly, 42. Welding gun, 5. Motor housing.

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 As shown, the present invention proposes a welding device for processing a motor housing 5, comprising a positioning component 1, a grabbing and placing component 2, a feeding component 3 and a welding component 4, wherein the feeding component 3 is arranged between the positioning component 1 and the grabbing and placing component 2, and the welding component 4 is located above the grabbing and placing component 2 and faces the positioning component 1.

[0039] Through the cleverly designed mechanical structure and control logic, the entire process of heat sink 38, from feeding, grabbing, positioning to welding, is automated, and all components work together to complete the welding task.

[0040] The positioning assembly 1 includes a first supporting assembly 11 and a self-centering rotating assembly 12 . The first supporting assembly 11 is arranged on the ground. The self-centering rotating assembly 12 is arranged on the first supporting assembly 11 . The motor housing 5 is sleeved on the self-centering rotating assembly 12 .

[0041] The self-centering rotating assembly 12 is used to clamp and rotate the motor housing 5. It can be a self-centering chuck composed of three or more radially expandable and movable support members. By synchronously driving the extension and retraction of these support members, the automatic centering and fixation of motor housings 5 ​​of different diameters can be achieved. At the same time, the self-centering rotating assembly 12 also includes 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 achieve precisely controlled rotational motion. This is an existing technology well known to people in this field.

[0042] Among them, the grabbing and placing component 2 includes a second support component 21, a track component 22, a steering component 23, a swing component 24, an electromagnet 25 and a pad 26. The second support component 21 is arranged on the ground, the track component 22 is arranged on the second support component 21, the steering component 23 is arranged on the inner side of the track component 22, the swing component 24 is arranged on the steering component 23, the electromagnet 25 is arranged on the swing component 24, and the pad 26 is arranged on the electromagnet 25.

[0043] The track assembly 22 , the steering assembly 23 and the swing assembly 24 together constitute the movement path of the heat sink 38 , the electromagnet 25 is responsible for adsorbing the heat sink 38 , and the pad 26 is responsible for single-sided welding and double-sided molding.

[0044] Among them, the track assembly 22 includes a fixed seat 224, an arc-shaped slide groove 221, a horizontal slide groove 222 and a vertical slide groove 223. The fixed seats 224 are symmetrically arranged at both ends of the second support assembly 21. The distance between the two fixed seats 224 is greater than the length of the motor housing 5. The arc-shaped slide groove 221 is opened through the fixed seat 224. The arc of the arc-shaped slide groove 221 is 90 degrees. The arc-shaped slide groove 221 is in the third quadrant relative to its center. The horizontal slide groove 222 and the vertical slide groove 223 are respectively connected to the upper and lower ends of the arc-shaped slide groove 221.

[0045] Among them, the steering assembly 23 includes a rotating shaft 231, a rotating rod 232, a through slot 234 and a clamping slot 233. The rotating shaft 231 is vertically engaged and rotatable on the fixed seat 224. The rotating shaft 231 is concentric with the arc-shaped slide slot 221. The rotating rod 232 is vertically arranged at one end of the rotating shaft 231. The through slot 234 vertically penetrates the part of the rotating rod 232 located on one side of the rotating shaft 231, and the clamping slot 233 is connected on both sides of the through slot 234.

[0046] Among them, the swing assembly 24 includes a sliding shaft 241, a swing arm 243, and a drive shaft 242. The sliding shaft 241 slides vertically in the horizontal slide groove 222, the arc slide groove 221 and the vertical slide groove 223. The swing arm 243 engages and slides in the card groove 233. The sliding shaft 241 and the swing arm 243 are vertically arranged. The drive shaft 242 is vertically arranged on the swing arm 243. The drive shaft 242 and the sliding shaft 241 are respectively arranged on both sides of the swing arm 243 and are coaxially arranged. The sliding shaft 241 and the drive shaft 242 both pass through the through groove 234. When the sliding shaft 241 is located in the horizontal slide groove 222, the swing arm 243 points to the motor housing 5.

[0047] The track assembly 22 provides guidance and constraints for the movement of the slide shaft 241, and the fixed seat 224 fixes the entire track system. The combined design of the arc slide groove 221, the horizontal slide groove 222 and the vertical slide groove 223 allows the slide shaft 241 to smoothly transition between horizontal, vertical and arc paths.

[0048] The function of the steering assembly 23 is to change the movement direction of the swing assembly 24 . The rotation of the rotating shaft 231 drives the rotating rod 232 to rotate, and then the swing angle of the swing arm 243 is controlled through the cooperation between the through slot 234 and the clamping slot 233 .

[0049] The swing assembly 24 directly controls the movement of the electromagnet 25 to achieve the grabbing and placement of the heat sink 38. The slide shaft 241 moves along the track assembly 22, the swing arm 243 slides in the slot 233, and the drive shaft 242 drives the movement of the swing arm 243. When the slide shaft 241 is located in the horizontal slot 222, the swing arm 243 extends, causing the electromagnet 25 to approach the motor housing 5, ready to place the heat sink 38.

[0050] Among them, the grabbing and placing component 2 also includes a hydraulic cylinder 29 and a controller 28. The cylinder end of the hydraulic cylinder 29 is rotatably connected to the second support component 21. The piston rod end of the hydraulic cylinder 29 is provided with a connecting piece 291. The connecting piece 291 is rotatably connected to the drive shaft 242. A tension and pressure sensor 27 is provided between the piston rod end of the hydraulic cylinder 29 and the connecting piece 291. The controller 28 is arranged on the electromagnet 25.

[0051] The hydraulic cylinder 29 provides power for the swing assembly 24 , and the controller 28 controls the suction and release of the electromagnet 25 according to the signal of the pull-pressure sensor 27 . The pull-pressure sensor 27 monitors the force between the piston rod of the hydraulic cylinder 29 and the connecting part 291 in real time, and feeds back the signal to the controller 28 .

[0052] The feeding assembly 3 includes 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 arranged horizontally on one side of the third supporting assembly 31. A support bar 321 is provided on the lower wall of the open end of the storage box 32. An L-shaped plate 322 is provided on the lower side of the storage box 32. The sliding column 33 vertically penetrates the L-shaped plate 322. There are multiple sliding columns 33. The sliding columns 33 are in close contact with the support bar 321. A compression spring 37 is provided in the storage box 32, and a push plate 36 is provided at one end of the compression spring 37. A plurality of heat sinks 38 are placed on one side of the push plate 36. The heat sinks 38 are tightly attached to the storage box 32. The length of the heat sink 38 is equal to the length of the motor housing 5, and the thickness of the heat sink 38 is equal to the thickness of the support bar 321. A spring seat 34 is provided at the lower end of the sliding column 33, and a tension spring 35 is provided between the spring seat 34 and the L-shaped plate 322. The tension spring 35 is sleeved on the outside of the sliding column 33.

[0053] The feeding assembly 3 is responsible for storing and supplying the heat sinks 38 one by one. A plurality of heat sinks 38 are installed in the storage box 32. The compression spring 37 pushes the push plate 36 so that the heat sink 38 always maintains a tendency to extend. The slide column 33 and the support bar 321 cooperate to control the heat sinks 38 to be taken out one by one. The tension spring 35 provides the force to reset the slide column 33.

[0054] The electromagnet 25 is disposed between the two swing arms 243. The electromagnet 25 is composed of two sections forming an L-shaped cross-section. The cross-section of the electromagnet 25 and the gasket 26 also forms an L-shape. 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.

[0055] The special shape of the electromagnet 25 is designed to better adapt to the shape and gripping requirements of the heat sink 38. The L-shaped design allows the electromagnet 25 to simultaneously adsorb two adjacent surfaces of the heat sink 38, thereby increasing the adsorption force.

[0056] Among them, when the hydraulic cylinder 29 is shortened to the minimum, the sliding shaft 241 is located in the vertical sliding groove 223 and the gasket 26 presses down the sliding column 33. At this time, the heat sink 38 located above the support bar 321 is completely supported by the notch of the electromagnet 25. When the hydraulic cylinder 29 is extended to the maximum, the sliding shaft 241 is located in the horizontal sliding groove 222 and the gasket 26 is supported against the motor housing 5. At this time, the heat sink 38 attracted by the electromagnet 25 is located above the electromagnet 25 and is spaced apart from the motor housing 5.

[0057] The gap between the heat sink 38 and the motor housing 5 is also called the groove, which is a necessary condition for single-sided welding and double-sided forming in the prior art.

[0058] Among them, the welding assembly 4 includes a translation assembly 41 and a welding gun 42. The translation assembly 41 is arranged on the ground. The reciprocating translation direction of the translation assembly 41 is the same as the axial direction of the motor housing 5. The welding gun 42 is arranged on the translation seat of the translation assembly 41.

[0059] The welding assembly 4 is responsible for welding the heat sink 38 to the motor housing 5, wherein the translation assembly 41 can be a linear module composed of a linear guide and a drive motor, driving the welding gun 42 to move axially along the motor housing 5. The welding gun 42 can be any welding gun 42 suitable for welding thin plates, such as tungsten inert gas welding or metal arc welding, all of which are existing technologies well known to people in this field.

[0060] Among them, when the pulling pressure sensor 27 just detects pressure, it transmits a signal to the controller 28 to keep the power of the electromagnet 25 turned on; when the pulling pressure sensor 27 just detects pulling force, it transmits a signal to the controller 28 to keep the power of the electromagnet 25 turned off. The single rotation direction of the self-centering rotating component 12 can make the heat sink 38 that has just been welded move upward. After the self-centering rotating component 12 rotates the preset angle and stops, the hydraulic cylinder 29 changes from the shortest to the longest, and then the welding gun 42 moves from one end of the motor housing 5 to the other end and further away, and then the hydraulic cylinder 29 changes from the longest to the shortest, and then the self-centering rotating component 12 rotates again.

[0061] The above is a description of the control logic of the entire welding process. The signal from the pull-pressure sensor 27 controls the suction and release of the electromagnet 25. The rotation of the self-centering rotating assembly 12 causes the motor housing 5 to gradually rotate. The extension and retraction of the hydraulic cylinder 29 controls the grabbing, placement, and separation of the heat sink 38. The movement of the welding gun 42 completes the welding. All the actions are coordinated to achieve automated welding.

[0062] The specific working process is as follows: Fixing and positioning of the motor housing 5: First, the motor housing 5 to be welded is placed on the self-centering rotating assembly 12 of the positioning assembly 1. The self-centering rotating assembly 12 has a plurality of radially movable supports, which will expand outward to tighten the motor housing 5 from the inside and automatically center it. The limiting members on the self-centering rotating assembly 12 ensure that the motor housing 5 is accurately placed in the horizontal space between the two fixing seats 224, providing a stable reference for subsequent welding operations.

[0063] Preparation of heat sink 38: Fill the storage box 32 of the feeding assembly 3 with the heat sink 38 to be welded. The compressed spring 37 in the storage box 32 will push the push plate 36 to keep the heat sink 38 always moving forward. The outermost heat sink 38 will be pushed out of the storage box 32, but will be blocked by the slide column 33 to ensure that only one heat sink 38 is in the position to be grasped at a time. At this time, the support bar 321 on the lower wall of the open end of the storage box 32 is aligned with the heat sink 38 to provide support for the grasping of the electromagnet 25.

[0064] Grasping and positioning of the heat sink 38: Grasping and placing component 2 starts working, the hydraulic cylinder 29 starts to shorten, and drives the swing arm 243 and the slide shaft 241 to move through the connecting piece 291 and the drive shaft 242. Initially, the slide shaft 241 is located in the horizontal slide groove 222, driving the swing arm 243 and the connected rotating rod 232 to remain horizontal. When the slide shaft 241 enters the vertical slide groove 223 from the arc slide groove 221, due to the constraint of the rotating shaft 231, the rotating rod 232 and the swing arm 243 will turn to a vertical state, and the hydraulic cylinder 29 continues to shorten, driving the slide shaft 241 moves downward, and under the restriction of the rotating rod 232, the swing arm 243 also moves vertically downward, so that the electromagnet 25 installed on the swing arm 243 and the pad 26 thereon move downward. The pad 26 first contacts and presses down the slide column 33, overcoming the tension of the tension spring 35. Then the L-shaped notch of the electromagnet 25 will completely press against the heat sink 38 that has extended out of the storage box 32 and is supported by the support bar 321. Then the hydraulic cylinder 29 begins to extend. At the moment when the hydraulic cylinder 29 extends, because it is the piston rod of the hydraulic cylinder 29 that presses against the connecting piece 291 moves upward, the tension pressure sensor 27 detects the pressure signal and transmits the signal to the controller 28. After receiving the pressure signal, the controller 28 immediately turns on the power supply of the electromagnet 25 and keeps the power supply on. The electromagnet 25 generates magnetic force and firmly absorbs the heat sink 38. As the hydraulic cylinder 29 continues to extend, the heat sink 38 is sucked by the electromagnet 25 and moves upward, leaving the storage box 32. At the same time, the slide column 33 is reset under the action of the tension spring 35. When the heat sink 38 completely leaves the storage box 32, the next heat sink 38 is received. 8 is pushed out by the pressure spring 37 and the push plate 36, and is blocked by the slide column 33 again, waiting for the next grab. The hydraulic cylinder 29 continues to extend, and the slide shaft 241 enters the horizontal slide groove 222. At this time, the swing arm 243 moves horizontally toward the motor housing 5, and finally the gasket 26 is against the outer surface of the motor housing 5. Due to the design of the electromagnet 25, the adsorbed heat sink 38 is now located above the electromagnet 25 and forms a precise gap with the motor housing 5. This gap is the groove required for the single-sided welding and double-sided forming process.

[0065] Welding of the heat sink 38: The welding assembly 4 starts working, and the welding gun 42, driven by the translation assembly 41, moves from one end to the other along the axial direction of the motor housing 5 to weld the groove between the positioned heat sink 38 and the motor housing 5. The welding adopts single-sided welding and double-sided forming technology, that is, welding is only performed on one side of the heat sink 38, but by controlling the welding parameters and the groove shape, the weld is well formed on both sides of the motor housing 5 and the heat sink 38.

[0066] Separation and circulation of heat sink 38: Since the welding process is driven by the translation assembly 41 to move the welding gun 42 from one end of the motor housing 5 to the other end, this means that welding is a non-instantaneous process. Therefore, when the welding gun 42 completes the last welding at the end of the weld, the initial section and the middle section of the weld have actually experienced sufficient natural cooling time. Since the cooling and solidification process of the metal is very rapid, at the moment the instruction for welding completion is issued, most areas of the entire weld have cooled and reached a very high mechanical strength. When the hydraulic cylinder 29 begins to retract, the pulling force generated by the magnetic force will act on the entire heat sink 38. The overall bonding strength of the entire weld is sufficient to resist the initial pulling force at the moment the electromagnet 25 separates. When the hydraulic cylinder 29 begins to shorten and apply pulling force, the weld will be completely sealed. When force is applied, an extremely small friction displacement within the allowable range may be generated between the heat sink 38 and the electromagnet 25, and then the tension pressure sensor 27 detects the tension signal and transmits the signal to the controller 28. After receiving the tension signal, the controller 28 immediately cuts off the power supply of the electromagnet 25 and keeps it in the off state. The electromagnet 25 loses its magnetic force and separates from the welded heat sink 38. Then the hydraulic cylinder 29 continues to shorten, preparing to grab the next heat sink 38. At the same time, the self-centering rotating assembly 12 rotates a certain angle according to the preset angle. This rotation direction ensures that the newly welded heat sink 38 moves upward to make room for the welding of the next heat sink 38. Repeat the above steps until all heat sinks 38 are welded along the circumference of the motor housing 5.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0068] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

[0069] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A welding device for motor housing processing, characterized in that: It comprises a positioning component (1), a grabbing and placing component (2), a feeding component (3) and a welding component (4), wherein the feeding component (3) is arranged between the positioning component (1) and the grabbing and placing component (2), and the welding component (4) is located above the grabbing and placing component (2) and faces the positioning component (1); The positioning assembly (1) comprises a first support assembly (11) and a self-centering rotation assembly (12), wherein the first support assembly (11) is arranged on the ground, the self-centering rotation assembly (12) is arranged on the first support assembly (11), and a motor housing (5) is sleeved on the self-centering rotation assembly (12); The grabbing and placing assembly (2) comprises a second supporting assembly (21), a track assembly (22), a steering assembly (23), a swing assembly (24), an electromagnet (25) and a pad (26), wherein the second supporting assembly (21) is arranged on the ground, the track assembly (22) is arranged on the second supporting assembly (21), the steering assembly (23) is arranged on the inner side of the track assembly (22), the swing assembly (24) is arranged on the steering assembly (23), the electromagnet (25) is arranged on the swing assembly (24), and the pad (26) is arranged on the electromagnet (25).

2. A welding device for motor housing processing according to claim 1, characterized in that: The track assembly (22) includes a fixed seat (224), an arcuate chute (221), a horizontal chute (222) and a vertical chute (223). The fixed seats (224) are symmetrically arranged at both ends of the second support assembly (21). The distance between the two fixed seats (224) is greater than the length of the motor housing (5). The arcuate chute (221) is opened on the fixed seat (224). The arcuate of the arcuate chute (221) is 90 degrees. The arcuate chute (221) is located in the third quadrant relative to its center. The horizontal chute (222) and the vertical chute (223) are respectively connected to the upper and lower ends of the arcuate chute (221).

3. The welding device for machining a motor housing according to claim 2, characterized in that: The steering assembly (23) comprises a rotating shaft (231), a rotating rod (232), a through slot (234) and a clamping slot (233). The rotating shaft (231) is vertically engaged and rotatably arranged on the fixing seat (224). The rotating shaft (231) is concentric with the arc-shaped sliding slot (221). The rotating rod (232) is vertically arranged at one end of the rotating shaft (231). The through slot (234) vertically penetrates a portion of the rotating rod (232) located on one side of the rotating shaft (231). The clamping slot (233) is connected and arranged on both sides of the through slot (234).

4. The welding device for motor housing processing according to claim 3, characterized in that: The swing assembly (24) includes a sliding shaft (241), a swing arm (243), and a drive shaft (242). The sliding shaft (241) slides vertically in the horizontal slide groove (222), the arc slide groove (221), and the vertical slide groove (223). The swing arm (243) slides in the clamping groove (233). The sliding shaft (241) and the swing arm (243) are vertically arranged. The drive shaft (242) is vertically arranged on the swing arm (243). The drive shaft (242) and the sliding shaft (241) are respectively arranged on both sides of the swing arm (243) and are coaxially arranged. The sliding shaft (241) and the drive shaft (242) both pass through the through groove (234). When the sliding shaft (241) is located in the horizontal slide groove (222), the swing arm (243) points to the motor housing (5).

5. The welding device for machining a motor housing according to claim 4, characterized in that: The grabbing and placing assembly (2) further includes a hydraulic cylinder (29) and a controller (28), wherein the cylinder end of the hydraulic cylinder (29) is rotatably connected to the second supporting assembly (21), the piston rod end of the hydraulic cylinder (29) is provided with a connecting piece (291), and the connecting piece (291) is rotatably connected to the driving shaft (242), a tension and pressure sensor (27) is provided between the piston rod end of the hydraulic cylinder (29) and the connecting piece (291), and the controller (28) is provided on the electromagnet (25).

6. The welding device for machining a motor housing according to claim 5, characterized in that: The feeding assembly (3) includes 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 arranged horizontally on one side of the third supporting assembly (31). The lower wall of the open end of the storage box (32) is provided with a support bar (321). The lower side of the storage box (32) is provided with an L-shaped plate (322). The sliding column (33) vertically penetrates the L-shaped plate (322). The sliding column (33) is provided in plurality. The sliding column (33) is in close contact with the support bar (321). The third supporting assembly (31) is provided on the storage box ( A compression spring (37) is provided in the storage box (32), a push plate (36) is provided at one end of the compression spring (37), a plurality of heat sinks (38) are placed on one side of the push plate (36), the heat sinks (38) are tightly attached to the storage box (32), the length of the heat sinks (38) is equal to the length of the motor housing (5), the thickness of the heat sinks (38) is equal to the thickness of the support bar (321), a spring seat (34) is provided at the lower end of the slide column (33), a tension spring (35) is provided between the spring seat (34) and the L-shaped plate (322), and the tension spring (35) is sleeved on the outside of the slide column (33).

7. The welding device for machining a motor housing according to claim 6, characterized in that: The electromagnet (25) is arranged between the two swing arms (243). The electromagnet (25) is composed of two sections forming an L-shaped cross-section. The cross-sections of the electromagnet (25) and the liner (26) also form an L-shape. 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).

8. The welding device for machining a motor housing according to claim 7, characterized in that: When the hydraulic cylinder (29) is shortened to its minimum, the sliding shaft (241) is located in the vertical sliding groove (223) and the liner (26) presses down the sliding column (33). At this time, the heat sink (38) located above the support bar (321) is completely supported by the notch of the electromagnet (25). When the hydraulic cylinder (29) is extended to its maximum, the sliding shaft (241) is located in the horizontal sliding groove (222) and the liner (26) is supported against the motor housing (5). At this time, the heat sink (38) attracted by the electromagnet (25) is located above the electromagnet (25) and is spaced apart from the motor housing (5).

9. The welding device for machining a motor housing according to claim 8, 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 axial direction of the motor housing (5); and the welding gun (42) is arranged on a translation seat of the translation assembly (41).

10. The welding device for machining a motor housing according to claim 9, characterized in that: When the tension pressure sensor (27) just detects pressure, it transmits a signal to the controller (28) to keep the power of the electromagnet (25) on. When the tension pressure sensor (27) just detects tension, it transmits a signal to the controller (28) to keep the power of the electromagnet (25) off. The single rotation direction of the self-centering rotating assembly (12) can make the heat sink (38) that has just been welded move upward. After the self-centering rotating assembly (12) rotates a preset angle and stops, the hydraulic cylinder (29) changes from the shortest to the longest. Then the welding gun (42) moves from one end of the motor housing (5) to the other end and further away. Then the hydraulic cylinder (29) changes from the longest to the shortest. Then the self-centering rotating assembly (12) rotates again.

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