Automatic laser welding equipment for refrigerator upper hinge

Abstract

The invention discloses refrigerator upper hinge automatic laser welding equipment, and relates to the field of laser welding, the refrigerator upper hinge automatic laser welding equipment comprises an equipment main body, the top of the equipment main body is provided with a welding turntable assembly, and the equipment main body is provided with a bracket; a hinge shaft carrying mechanical arm mechanism and a material taking mechanical arm mechanism are arranged on the support, automatic visual detection equipment and a laser welding module assembly are fixedly arranged on the rear side of the equipment body, a vibration disc assembly is arranged on the left side of the equipment body, and a hinge shaft conveying rail is arranged between the vibration disc assembly and the equipment body. A control operation panel assembly is fixedly arranged on the support, and a laser welding main machine and an argon protection gas cylinder are arranged on the rear side of the vibration disc assembly. A traditional energy storage welding electrode is replaced with the laser welding module assembly, so that the single-piece welding time is shortened, and the production efficiency is improved compared with energy storage welding.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to an automatic laser welding device for refrigerator hinges. Background Technology

[0002] In the refrigerator manufacturing industry, the upper hinge is the core load-bearing component for door opening and closing, and its welding precision directly determines the sealing performance and service life of the refrigerator door. Currently, the mainstream connection process for hollow shaft refrigerator upper hinges is energy storage welding. This technology applies pressure through copper electrodes and utilizes the heat generated by contact resistance to achieve welding. Although it has the characteristics of high welding efficiency and speed, it has unavoidable technical defects.

[0003] The copper electrodes used in energy storage welding are inherently weak due to their need for internal cooling water, making them highly susceptible to deformation during continuous welding. Manual operation not only disrupts the production process but also frequently leads to electrode welding surface tilting because the precision of grinding depends on the operator's experience. This tilting directly causes the hinge axis perpendicularity to exceed tolerances. With the increasing prevalence of built-in refrigerators, the industry's requirements for hinge perpendicularity have increased, imposing stringent standards on the control precision of the hinge axis perpendicularity.

[0004] More importantly, the lag and subjectivity of manual identification of electrode flatness often lead to defective products flowing into the next process. Summary of the Invention

[0005] This invention provides an automatic laser welding device for refrigerator hinges.

[0006] An automatic laser welding device for refrigerator hinges includes: a main body, a welding turntable assembly on the top of the main body, a support on the main body, a hinge shaft handling robot and a material handling robot on the support, an automatic vision inspection device and a laser welding module assembly fixedly mounted on the rear side of the main body, a vibratory feeder assembly on the left side of the main body, a hinge shaft transmission track between the vibratory feeder assembly and the main body, a control panel assembly fixedly mounted on the support, and a laser welding host and an argon protective gas cylinder on the rear side of the vibratory feeder assembly. The welding turntable assembly is used to carry and rotate the workpiece to switch the workpiece between different stations, the equipment body is used to provide structural support and integrate other components, the hinge shaft carrying mechanical hand assembly is used to take the hinge shaft from the hinge shaft transmission track and accurately place it to the corresponding position of the workpiece on the welding turntable assembly, the taking mechanical hand assembly is used to take away the welded workpiece from the welding turntable assembly, and according to the detection result of the visual automatic detection equipment, the qualified workpiece is placed in the storage cage or the unqualified workpiece is reserved in the station, the visual automatic detection equipment is used for visual appearance detection of the welded workpiece to identify welding defects caused by part size, hinge shaft placement deviation or insufficient protective gas, the laser welding module assembly is used to perform laser welding operation, and the laser welding head is controlled to move along the preset welding seam track through the three-axis module, the vibration disc assembly is used to store, sort and convey the hinge shaft, and the hinge shaft is continuously supplied to the hinge shaft carrying mechanical hand assembly in the required state through the hinge shaft transmission track, so that the hinge shaft is automatically oriented and fed, and the hinge shaft transmission track is used to transmit the hinge shaft sorted by the vibration disc assembly to the hinge shaft carrying mechanical hand assembly taking position at the equipment body, and the control operation panel assembly is used for user operation, control of equipment running process, monitoring of equipment state and triggering of alarm, and the laser welding host is used to drive the laser welding module assembly to seal weld the joint of the hinge shaft and the hinge plate, and the argon gas cylinder is used to provide protective gas to prevent the weld from oxidizing during welding.

[0007] Preferably, the welding turntable assembly comprises: a turntable assembly, the turntable assembly is arranged above the equipment body, and a gas and electricity slip ring is arranged in the center of the turntable assembly, and a laser welding module assembly is fixedly arranged on one side of the gas and electricity slip ring; The laser welding module assembly comprises: a laser welding assembly, a taking mechanical hand is arranged at the left and right ends of the front side of the laser welding assembly, a part sliding plate is fixedly arranged on the right side of the taking mechanical hand, an optoelectronic grid is fixedly arranged at the left and right ends of the front side of the equipment box body, a toggle switch is fixedly arranged at the top of the front side of the equipment box body, and a gas valve station and an electrical controller are sequentially arranged in the right side of the equipment box body.

[0008] Preferably, the vibration disc assembly comprises: a box body, the box body is composed of a frame and a door assembly, the box body is used to provide an installation body for the vibration disc assembly, a box cover is arranged at the top of the box body, a storage disc is fixedly arranged below the left box cover through a gas cylinder, a hinge shaft vibration classification disc is arranged in the right box body, a transmission track is arranged at the outlet of the hinge shaft vibration classification disc, a controller is fixedly arranged below the left box body, and a plurality of connecting pieces are arranged below the right box body; The storage disc is used for manual feeding and storing hinge shafts, the hinge shaft vibration classification disc is used for automatically sorting and conveying the hinge shafts to the transmission track in the required state, the transmission track is connected with the hinge shaft transmission track, and the hinge shaft is transmitted to the taking mechanical hand of the welding equipment, so that the hinge shaft is continuously supplied; The controller is used for controlling the working of the hinge shaft vibration classification disc according to the signals collected by the sensors, continuously transmitting the hinge shafts to the track, and detecting the number of hinge shafts in the hinge shaft vibration classification disc, so that the mechanism in the storage disc can be opened in time to supplement the hinge shafts to the hinge shaft vibration classification disc, and the connecting piece is used for connecting the equipment main body of the welding equipment, so that the hinge shafts can be continuously and stably supplied.

[0009] Preferably, the visual automatic detection equipment is electrically connected with the control operation panel assembly in communication; The visual automatic detection equipment is used for triggering the alarm prompt of the control operation panel assembly when detecting the welding defects, and the taking mechanism is not in action, so that the unqualified workpiece is retained on the welding turntable assembly and rotated to the hinge plate feeding station for manual confirmation.

[0010] Preferably, the laser welding module assembly comprises a laser welding head and a three-axis module, the laser welding head can be lowered to a fixed position away from the welding seam at the welding station, and the welding seam track is formed according to the drawing requirements through the movement of the three-axis module.

[0011] Preferably, the turntable assembly comprises a driving motor and a speed reducer assembly, a turntable body, a plurality of product positioning tool jigs and pneumatic clamping jaws, and a plurality of stations are distributed around the turntable assembly, which correspond to the hinge plate manual feeding station, the hinge shaft automatic feeding station, the laser automatic welding station and the automatic unloading station respectively; The driving motor and the speed reducer assembly are used for driving the turntable body to rotate by program control, and each rotation switches one station, the sensor mounting assembly is mounted on the lower bottom plate, and corresponding sensors are mounted thereon, the sensors are used for adapting to the placement of the parts and the identification of different products, the product positioning tool jigs are mounted on the turntable body, and there are four sets of tool jigs, the parts are placed in the jigs, the turntable body is used for driving the product positioning tool jigs to rotate with the turntable body, and through the rotation of the turntable body, the parts are switched in the four stations in turn, so that the parts can complete the corresponding processes; The product positioning tool jigs are mounted on the turntable body and used for positioning and fixing the workpieces, the pneumatic clamping jaws are used for clamping the workpieces to ensure the welding precision, and the front side of the turntable body is fixedly provided with the sensor mounting assembly.

[0012] Compared with the prior art, the present application has the following advantages: The device adopts a laser welding module assembly to replace a traditional energy storage welding electrode, and precisely controls the movement of a laser welding head along a preset track through a three-axis module, thereby fundamentally eliminating quality risks caused by deformation of a red copper electrode. In combination with an inert gas environment provided by an argon gas cylinder, oxidation of a weld can be effectively avoided, and a welding defect rate can be reduced. A visual automatic detection device can identify part size deviation, hinge shaft deviation and other problems in real time and trigger an alarm, and in combination with rigid fixation of a pneumatic gripper, the perpendicularity error of a hinge shaft can be stably controlled, thereby meeting the assembly precision requirements of high-end refrigerators.

[0013] The device realizes automatic sorting and continuous feeding of the hinge shaft through cooperation of a vibration disc assembly and a hinge shaft transmission track, and in combination with precise picking and placing of a hinge shaft handling manipulator. Compared with a traditional process mode requiring cooperation of an operator, the device can directly save an operator. Meanwhile, the four-station cycle design of the welding turntable assembly improves continuous operation capability, thereby shortening single-piece welding time and improving production efficiency compared with energy storage welding. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 shows a perspective structural schematic view of a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure.

[0015] Figure 2 FIG. 2 shows a perspective structural schematic view of a rear side of a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure. Figure 3 FIG. 3 shows a perspective structural schematic view of a vibration disc assembly in a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure. Figure 4 FIG. 4 shows a perspective structural schematic view of a turntable assembly in a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure. Figure 5 FIG. 5 shows a perspective structural schematic view of a turntable body in a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure. Figure 6 FIG. 6 shows a perspective structural schematic view of a laser automatic welding weld in a refrigerator upper hinge automatic laser welding device according to an embodiment of the present disclosure.

[0016] Wherein: 1, vibration disc assembly; 2, hinge shaft transmission track; 3, equipment main body; 4, hinge shaft carrying mechanical hand mechanism; 5, welding rotary table assembly; 6, material taking mechanical hand mechanism; 7, control operation panel assembly; 8, visual automatic detection equipment; 9, laser welding module assembly; 10, laser welding main machine; 11, argon protection gas cylinder; 12, storage cage; 101, box body; 102, storage tray; 103, hinge shaft vibration classification disc; 104, box cover; 105, transmission track; 106, controller; 107, connecting piece; 501, rotary table assembly; 503, laser welding assembly; 504, gas and electricity slip ring; 505, material taking mechanical hand; 506, part sliding plate; 507, gas valve station; 508, electrical controller; 509, photoelectric grid; 510, toggle switch; 5011, driving motor and speed reducer assembly; 5013, rotary table body; 5012, sensor mounting assembly; 5014, product positioning tooling jig; 5017, pneumatic clamping jaw. DETAILED DESCRIPTION

[0017] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the drawings represent the same elements or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0018] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0019] In addition, for the purpose of convenience and brevity, detailed descriptions of well-known methods, apparatuses, circuits, and circuitry are omitted so as not to unnecessarily obscure the teachings of the present disclosure.

[0020] Reference Figures 1-6 As shown in the drawings, the hinge automatic laser welding equipment of the refrigerator of the embodiment includes an equipment main body 3, the equipment main body 3 is formed by welding a steel plate, and provides rigid structural support for the entire equipment. A welding rotary table assembly 5 is fixedly installed on the top of the equipment main body 3 through bolts. A gas and electricity slip ring 504 is connected to the center of the welding rotary table assembly 5 through a bearing seat. The gas and electricity slip ring 504 is used to realize the conduction of the gas circuit and the circuit when the rotary table rotates, and avoid pipeline winding.

[0021] The left side of the device body 3 is bolted with the vibrating disc assembly 1 through the connecting piece 107, the vibrating disc assembly 1 and the device body 3 are provided with the hinge shaft transmission track 2, the hinge shaft transmission track 2 is butted with the transmission track 105 of the vibrating disc assembly through the buckle, forming a continuous conveying channel of the hinge shaft; the rear side of the device body 3 is fixed with the visual automatic detection equipment 8 and the laser welding module assembly 9 through the angle steel support, the visual automatic detection equipment 8 adopts an industrial camera, and the lens is directly opposite the automatic unloading station of the welding turntable assembly 5; the laser welding module assembly 9 includes a laser welding head and a three-axis module, the three-axis module is driven through a ball screw, and the laser welding head is installed on the module slider through a quick-change connector.

[0022] The bracket is welded on the device body 3, the hinge shaft carrying manipulator mechanism 4 and the material taking manipulator mechanism 6 are connected to the bracket through the guide rail sliding block, both of which are driven by a servo motor and can realize XYZ three-axis movement; the control operation panel assembly 7 is bolted on the front side of the bracket, and the control operation panel assembly 7 is electrically communicated with the visual automatic detection equipment 8 and the electrical controller 508 through the RS485 bus; the laser welding host 10 is connected with the laser welding head through an optical fiber, and the argon protection gas cylinder 11 is connected with the gas path interface of the laser welding head through a high-pressure gas pipe, and a flow meter is arranged on the gas pipe.

[0023] The turntable body 5013 of the welding turntable assembly 5 is uniformly distributed with four sets of product positioning tool jigs 5014, the tool jigs are connected with the turntable body through positioning pins, and the side is provided with pneumatic clamping jaws 5017 connected with the air valve station 507 in the device body 3 through a gas pipe; the driving motor and the speed reducer assembly 5011 are connected with the turntable body 5013 below through a key, the motor output shaft drives the turntable body to rotate, each rotation switches a station, and the four stations are: a hinge plate manual feeding station, a hinge shaft automatic feeding station, a laser automatic welding station and an automatic unloading station; the storage cage 12 is placed on the right side of the device body 3 and located below the movement track of the material taking manipulator mechanism 6, and is used for storing qualified workpieces.

[0024] In some examples, the photoelectric grid 509 is installed on the front side of the device body 3 and is linked with the electrical controller 508, so that the device movement assembly is immediately paused when the hands of the personnel enter the working area; In some examples, the inner wall of the hinge shaft transmission track 2 is provided with a V-shaped guide groove, and a wear-resistant rubber strip is pasted in the groove, so that the hinge shaft can be directionally guided and prevented from deviating during transmission; a proximity switch is installed at the end of the track, and when the hinge shaft reaches the material taking position, a signal is sent to the hinge shaft carrying manipulator mechanism 4 to trigger the material taking action, so as to ensure the accuracy and timeliness of the material taking of the manipulator.

[0025] This is the working principle of the present application: In the use of this refrigerator hinge automatic laser welding equipment, first need to complete the equipment initialization and connection debugging, the device body 3 stable fixed in the workshop preset work station, through the connecting piece 107 at the bottom of the vibration disc assembly 1 and the device body 3 left side bolt connection, ensure the transmission rail 2 between the hinge shaft of vibration disc assembly 1 and the device body 3 accurate docking, no misalignment. Then, the laser welding host 10 is connected with the laser welding module assembly 9 at the back of the device body 3 through the optical fiber, the argon protection gas cylinder 11 is connected with the laser welding head gas path interface through the high pressure gas pipe, and whether the flowmeter on the gas pipe is normally displayed is checked. Turn on the power switch of the control operation panel assembly 7, enter the parameter setting interface, call the pre stored welding program according to the hinge type to be welded, and start the calibration function of the visual automatic detection equipment 8, so as to ensure that the shooting area covers the automatic feeding work station of the welding turntable assembly 5.

[0026] After the preparation work is completed, the sufficient hinge shaft is manually put into the storage tray 102 of the vibration disc assembly 1, and the box cover 104 is closed. The operator puts the hinge plate into the product positioning tool jig 5014 at the first work station of the turntable body 5013 corresponding to the hinge plate manual feeding work station of the welding turntable assembly 5, and the pneumatic clamp 5017 automatically clamps the workpiece. Then the operator leaves the light grid 509 sensing area in front of the device body 3, presses the toggle switch 510 on the front side of the device box, drives the motor and speed reducer assembly 5011 to rotate the turntable body 5013 clockwise by one work station, at this time, the original feeding work station is transferred to the hinge shaft automatic feeding work station, and the new empty tool jig is transferred to the feeding work station.

[0027] In the hinge shaft automatic feeding stage, the controller 106 of the vibration disc assembly 1 triggers the hinge shaft vibration sorting disc 103 to start, sorts the hinge shaft supplemented by the storage tray 102 according to the preset posture, and transports it to the taking position through the transmission rail 105 and the hinge shaft transmission rail 2. After receiving the signal, the hinge shaft carrying manipulator 4 moves to the taking position to grab the hinge shaft, accurately places it into the corresponding mounting hole of the hinge plate in the current work station tool jig, and then the manipulator returns to the taking position. At the same time, after the sensor at the cutting position senses that the hinge shaft is taken away, the cutting assembly is controlled to rotate 90 degrees and dock with the vibration disc guide rail, and then returns to the taking position after the new hinge shaft is supplied.

[0028] When the operator finishes placing the hinge plate at the new feeding station and presses the toggle switch 510 again, the turntable body 5013 continues to rotate one station, and the workpiece that has completed the hinge shaft feeding is transferred to the laser automatic welding station. At this time, the three-axis module of the laser welding module assembly 9 drives the laser welding head to drop to a fixed position at a certain distance from the weld, the argon protection gas cylinder 11 supplies gas synchronously, the laser welding host 10 outputs laser, and the welding head moves along the preset weld trajectory to seal and weld the joint between the hinge shaft and the hinge plate. During the welding process, the gas and electric slip ring 504 ensures that the gas circuit and the circuit are continuously connected when the turntable rotates, avoiding pipeline entanglement.

[0029] After welding, the toggle switch 510 is pressed for the third time, and the workpiece is rotated with the turntable to the automatic unloading station. The visual automatic detection equipment 8 is started, and the appearance of the weld is photographed by the industrial camera to identify whether there are defects caused by part size deviation, hinge shaft deviation, or insufficient protection gas. If the detection is qualified, the taking mechanical hand mechanism 6 moves above the tool jig, grabs the workpiece and places it on the part slide 506, and the workpiece slides into the storage cage 12 along the slide. If the detection is unqualified, the control operation panel assembly 7 triggers an audible and light alarm, and the taking mechanical hand mechanism 6 does not act. When the toggle switch 510 is triggered next time, the unqualified workpiece is rotated back to the hinge plate manual feeding station with the turntable, and the operator checks and confirms the defect reason.

[0030] The above has described various embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. An automatic laser welding device for refrigerator hinges, characterized in that, include: The equipment body (3) is provided with a welding turntable assembly (5) on the top of the equipment body (3), a bracket is provided on the equipment body (3), a hinge shaft handling robot mechanism (4) and a material picking robot mechanism (6) are provided on the bracket, a visual automatic inspection device (8) and a laser welding module assembly (9) are fixedly provided on the rear side of the equipment body (3), a vibratory feeder assembly (1) is provided on the left side of the equipment body (3), a hinge shaft transmission track (2) is provided between the vibratory feeder assembly (1) and the equipment body (3), a control operation panel assembly (7) is fixedly provided on the bracket, and a laser welding host (10) and an argon protective gas cylinder (11) are provided on the rear side of the vibratory feeder assembly (1); The welding turntable assembly (5) is used to carry and rotate the workpiece to switch the workpiece between different workstations. The main body of the equipment (3) is used to provide structural support and integrate and accommodate other components. The hinge shaft handling robot mechanism (4) is used to pick up the hinge shaft from the hinge shaft transfer track (2) and accurately place it at the corresponding position of the workpiece on the welding turntable assembly (5). The material handling robot mechanism (6) is used to pick up the welded workpiece from the welding turntable assembly (5) and place qualified workpieces into the storage cage (12) or retain unqualified workpieces at the workstation according to the detection results of the automatic vision inspection equipment (8). The automatic vision inspection equipment (8) is used to perform visual inspection on the welded workpieces to identify welding defects caused by part size, hinge shaft misalignment, or insufficient shielding gas. The laser welding module assembly (9) is used to perform laser welding operations. The laser welding head moves along the preset weld seam trajectory through the three-axis module motion control. The vibratory feeder assembly (1) is used to store, sort and transport the hinge shaft. The hinge shaft is continuously supplied to the hinge shaft handling robot (4) through the hinge shaft transmission track (2) according to the required state, realizing the automatic orientation feeding of the hinge shaft. The hinge shaft transmission track (2) is used to transport the hinge shaft sorted by the vibratory feeder assembly (1) to the material picking position of the hinge shaft handling robot (4) at the main body of the equipment (3). The control operation panel assembly (7) is used for user operation, control of equipment operation process, monitoring of equipment status and triggering alarm. The laser welding host (10) is used to drive the laser welding module assembly (9) to perform sealing welding on the joint between the hinge shaft and the hinge plate. The argon protective gas cylinder (11) is used to provide protective gas to prevent the weld seam from oxidizing during the welding process.

2. The automatic laser welding equipment for refrigerator hinges according to claim 1, characterized in that, The welding turntable assembly (5) includes: a turntable assembly (501), which is located above the main body of the equipment (3). A pneumatic slip ring (504) is provided in the center of the turntable assembly (501), and a laser welding module assembly (9) is fixedly provided on one side of the pneumatic slip ring (504). The laser welding module assembly (9) includes: a laser welding assembly (503), a material handling robot (505) is provided on both the left and right sides of the front side of the laser welding assembly (503), a part slide plate (506) is fixedly provided on the right side of the material handling robot (505), a photoelectric grid (509) is fixedly provided on both the left and right sides of the front side of the equipment housing (3), a toggle switch (510) is fixedly provided on the top of the front side of the equipment housing (3), and a gas valve station (507) and an electrical controller (508) are arranged sequentially on the right side of the equipment housing (3).

3. The automatic laser welding equipment for refrigerator hinges according to claim 1, characterized in that, The vibratory feeder assembly (1) includes: a housing (101), which is composed of a frame and a door assembly. The housing (101) is used to provide the mounting body for the vibratory feeder assembly (1). A cover (104) is provided on the top of the housing (101). A storage tray (102) is fixedly provided below the cover (104) on the left side by a cylinder. A hinge shaft vibratory sorting tray (103) is provided inside the housing (101) on the right side. A transmission rail (105) is provided at the outlet of the hinge shaft vibratory sorting tray (103). A controller (106) is fixedly provided below the housing (101) on the left side. Multiple sets of connectors (107) are provided below the housing (101) on the right side. The storage tray (102) is used for manual input and storage of hinge shafts. The hinge shaft vibration sorting tray (103) is used to automatically sort the hinge shafts according to the required state and transport them to the transmission track (105). The transmission track (105) is connected to the hinge shaft transmission track (2) to transport the hinge shafts to the material handling robot of the welding equipment, so as to realize the continuous supply of hinge shafts. The controller (106) is used to control the operation of the hinge vibration sorting plate (103) according to the signals collected by each sensor, continuously transmit the hinge shaft to the track, and at the same time detect the number of hinge shafts in the hinge shaft vibration sorting plate (103), and open the mechanism in the storage plate (102) in time to replenish the hinge shafts into the hinge shaft vibration sorting plate (103). The connector (107) is used to connect the main body of the welding equipment to maintain a continuous and stable supply of hinge shafts.

4. The automatic laser welding equipment for refrigerator hinges according to claim 1, characterized in that, The visual automatic inspection device (8) is electrically connected to the control operation panel assembly (7); The visual automatic inspection equipment (8) is used to control the operation panel assembly (7) to trigger an alarm when a welding defect is detected, and the material handling robot (6) does not move, so that the unqualified workpiece is left on the welding turntable assembly (5) and rotated with the turntable to the hinge plate loading station for manual confirmation.

5. The automatic laser welding equipment for refrigerator hinges according to claim 1, characterized in that, The laser welding module assembly (9) includes a laser welding head and a three-axis module. The laser welding head can be lowered to a fixed position at the welding station and form a weld trajectory according to the drawing requirements through the movement of the three-axis module.

6. The automatic laser welding equipment for refrigerator hinges according to claim 2, characterized in that, The turntable assembly (501) includes: a drive motor and reducer assembly (5011), a turntable body (5013), multiple sets of product positioning fixtures (5014) and pneumatic grippers (5017). There are 4 stations distributed around the turntable assembly, which correspond to the manual loading station for hinge plates, the automatic loading station for hinge shafts, the automatic laser welding station and the automatic unloading station, respectively. The drive motor and reducer assembly (5011) is used to drive the turntable body to rotate by program control. Each rotation switches one workstation. The sensor mounting assembly (5012) is mounted on the lower base plate and has corresponding sensors installed on it. The sensors are used to adapt to the placement of parts and to identify different products. The product positioning fixture is mounted on the turntable body. There are a total of 4 fixtures. The parts are placed in the fixtures. The turntable body drives the product positioning fixture to rotate with the turntable body. Through the rotation of the turntable body, the parts are switched sequentially between the 4 workstations to ensure that the products complete the corresponding processes. The product positioning fixture (5014) is mounted on the turntable body (5013) for positioning and fixing the workpiece. The pneumatic gripper (5017) is used to clamp the workpiece to ensure welding accuracy. A sensor mounting assembly (5012) is fixedly installed on the front side of the turntable body (5013).

Images