A nut mounting welding device

Abstract

The application relates to the technical field of nut welding, and discloses a welding device for nut mounting, which comprises a rack, a machine head welding part and a motor welding part are connected to one side of the top end of the rack, an upper fixing frame is connected to one side of the machine head welding part, a connecting frame is connected to one side of the upper fixing frame, a screening assembly is connected to one side of the connecting frame, a discharging assembly is connected to one end of the screening assembly, and a positioning air cylinder is connected to the top end of one side of the screening assembly. The screening assembly and the discharging assembly are arranged, automatic sorting, conveying and positioning of nuts are realized, the traditional manual nut placing mode is replaced, the labor intensity is greatly reduced, the continuous production demand is met, and the overall efficiency of the welding operation is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of nut welding technology, specifically a welding device for nut installation. Background Technology

[0002] In the fields of mechanical manufacturing and automated assembly, welding nuts to plates or profiles is a common connection method. Traditional nut welding operations typically involve manually placing the nut on the workpiece at the predetermined welding position, and then operating the welding equipment to perform the welding. This operation mode has several problems, such as low efficiency and high labor intensity due to manual loading, making it difficult to meet the needs of large-scale production. The positional accuracy of manually placing the nut is difficult to guarantee, which can easily lead to problems such as misalignment and incomplete welding, resulting in unstable welding quality and a high defect rate. Furthermore, manual operation requires frequent adjustments to the workpiece position, further reducing production efficiency and positioning accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device for nut installation, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A frame is included, with a machine head weldment and a motor weldment connected to one side of the top of the frame; an upper fixed frame is connected to one side of the machine head weldment; a connecting frame is connected to one side of the upper fixed frame; a screening assembly is connected to one side of the connecting frame; a discharge assembly is connected to one end of the screening assembly; a positioning cylinder is connected to the top of one side of the screening assembly; a lower fixed frame is connected to one side of the motor weldment; a support plate is connected to the top of the lower fixed frame; top-feeding assemblies are connected to both sides of the support plate; an adjustment assembly mounting frame is connected to the top of the support plate; a hydraulic cylinder is connected to the top of the adjustment assembly mounting frame; the output end of the hydraulic cylinder passes through the adjustment assembly mounting frame and is connected to an adjustment assembly; a guide rod is connected to the top of the adjustment assembly; the guide rod is slidably connected to the adjustment assembly mounting frame; and a control cabinet is connected to one side of the frame. A transformer is connected inside the frame. Two sets of copper strips are connected to one side of the transformer. One end of each copper strip is connected to a lower electrode assembly and an upper electrode assembly, respectively. A lower hydraulic cylinder is connected to one side of the machine head weldment. The output end of the lower hydraulic cylinder is connected to the upper electrode assembly. An industrial camera is connected to the bottom end of the upper electrode assembly.

[0005] Preferably, the connecting frame includes a connector fixedly mounted on one side of the upper fixed frame, a traction rod slidably mounted on one side of the connector, a fixing clamp connected to the bottom end of the traction rod, a return spring connected between the upper end of the traction rod and the connector, side plates connected to both sides of the fixing clamp, the side plates being fixedly connected to the upper electrode assembly, and the screening assembly being connected between the fixing clamps.

[0006] Preferably, the screening assembly includes a storage frame, a movable spring plate is connected between the inner walls of the storage frame, a bottom plate is connected to the bottom end of the storage frame, a voice coil motor is connected between the bottom plate and the movable spring plate, a discharge chute is connected to one end of the storage frame, and the discharge assembly is connected to both sides of the discharge chute.

[0007] Preferably, the discharge assembly includes hub motors connected to both sides of the discharge chute, a conveyor belt is sleeved between the hub motors, and a strong magnet is embedded in the inner side of the conveyor belt.

[0008] Preferably, a welding port is provided on one side of the discharge trough corresponding to the upper electrode assembly, and a guide hole is provided on one side of the discharge trough. A limit bolt is slidably arranged between the guide holes, and a nut is connected to one end of the limit bolt.

[0009] Preferably, the bottom end of the tray is connected to a bracket, the bracket is fixedly mounted on one side of the lower fixing frame, the top material assembly is slidably mounted on the bottom end of the tray, and the top end of the tray has a through hole corresponding to the lower electrode assembly.

[0010] Preferably, the top material assembly includes a crossbeam plate, with multiple sets of rollers rotatably mounted on the top of the crossbeam plate, a guide rod connected to the top of the crossbeam plate, a traction spring sleeved between the bottom end of the guide rod and the support plate, a support foot tube connected to the bottom end of the adjustment assembly mounting frame, the top end of the guide rod penetrating the support plate and extending into the support foot tube, a signal receiver connected to the top of the adjustment assembly mounting frame, and the adjustment assembly located inside the bottom end of the adjustment assembly mounting frame.

[0011] Preferably, the adjustment component includes a C-shaped frame, a drive belt is connected to the inner side of the C-shaped frame, an auxiliary frame is connected to the back side of the C-shaped frame, a push cylinder is connected to one side of the auxiliary frame, the output end of the push cylinder passes through the auxiliary frame and is connected to a backing plate, a guide rod is connected to one side of the backing plate, and the guide rod is slidably connected to the auxiliary frame.

[0012] In summary, the beneficial effects of this invention are: This application achieves automatic sorting, conveying, and positioning of nuts by setting up a screening component and a discharge component, replacing the traditional method of manually placing nuts one by one. This significantly reduces labor intensity, meets the needs of continuous production, and effectively improves the overall efficiency of welding operations. An industrial camera and adjustment components form a closed-loop vision positioning system, which can detect and automatically correct the positional deviation of welding points on the workpiece in real time. Meanwhile, limit bolts and positioning cylinders ensure the accuracy of nut feeding, avoiding problems such as offset and missed welding caused by manual placement, significantly reducing the defect rate. The connecting frame links the screening component and the upper electrode component, allowing for precise control when the upper electrode is pressed down. During welding, the screening assembly moves downward synchronously, ensuring a short and accurate stroke of the nut from the end of the conveyor to the welding station. The reset spring ensures a smooth and reliable return of the screening assembly. The rollers and traction springs in the top assembly can slightly lift the workpiece when it needs to be moved, changing sliding friction into rolling friction and greatly reducing the resistance to workpiece movement. Combined with the precise drive of the adjustment assembly for the four degrees of freedom of the workpiece (front, back, left, and right), the workpiece position can be easily and flexibly adjusted to adapt to the processing needs of multi-point welding or workpieces of different specifications. Fully automatic control is achieved through the control cabinet, reducing the frequency of direct manual intervention in the welding process and lowering operational risks. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a welding device for nut installation according to the present invention; Figure 2 This is a side view of a welding device for nut installation according to the present invention. Figure 3 This is a side sectional view of a welding device for nut installation according to the present invention. Figure 4 This is a partial side sectional view of a welding device for nut installation according to the present invention. Figure 5 This is a partial structural diagram of a welding device for nut installation according to the present invention; Figure 6 for Figure 5 A schematic diagram of the exploded structure; Figure 7 This is a side sectional view of the connecting frame and the screening assembly in a welding device for nut installation according to the present invention. Figure 8 This is a schematic diagram of the connection structure of the connecting frame and the screening assembly in a welding device for nut installation according to the present invention; Figure 9 for Figure 8 Enlarged structural diagram of section A.

[0014] In the diagram: 1. Frame; 2. Head weldment; 3. Motor weldment; 4. Upper fixed frame; 5. Connecting frame; 51. Connecting piece; 52. Traction rod; 53. Fixing clamp; 54. Return spring; 56. Side plate; 6. Screening assembly; 61. Storage frame; 62. Movable spring plate; 63. Base plate; 64. Voice coil motor; 65. Discharge chute; 7. Positioning cylinder; 8. Hub motor; 9. Conveyor belt; 10. Strong magnet; 11. Limit bolt; 12. Nut; 13. Lower fixed frame; 14. Support plate; 141. Insert frame; 15. Top material assembly; 151. Crossbeam plate; 15 2. Roller; 153. Guide rod; 154. Traction spring; 16. Adjustment component mounting bracket; 161. Support leg tube; 162. Signal receiver; 17. Hydraulic cylinder one; 18. Adjustment component; 181. C-frame; 182. Drive belt; 183. Auxiliary frame; 184. Push cylinder; 185. Support plate; 19. Guide rod one; 20. Guide rod two; 21. Control cabinet; 22. Downward hydraulic cylinder; 23. Transformer; 24. Copper strip; 25. Lower electrode assembly; 26. Upper electrode assembly; 30. Industrial camera; 111. Weld joint; 222. Guide hole. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-9This invention provides a technical solution comprising a frame 1, with a machine head welding component 2 and a motor welding component 3 connected to one side of the top of the frame 1. An upper fixing frame 4 is connected to one side of the machine head welding component 2, and a connecting frame 5 is connected to one side of the upper fixing frame 4 for connecting a screening assembly 6, allowing the screening assembly 6 to move up and down with the upper electrode assembly 26. The screening assembly 6 is connected to one side of the connecting frame 5, which can automatically and orderly arrange the nuts to be welded and feed them. A discharge component is connected to one end of the screening assembly 6, which can orderly drive the nuts to be welded into the welding port 111, so that the nuts are directly positioned between the electrode assembly 26 and the workpiece. A positioning cylinder 7 is connected to the top of one side of the screening assembly 6. A lower fixed frame 13 is connected to one side of the frame 1. A support plate 14 is connected to the top of the lower fixed frame 13. A top material assembly 15 is connected to both sides of the support plate 14. When the position of the workpiece needs to be adjusted, the 15 can lift the workpiece upward to move it. An adjustment assembly mounting frame 16 is connected to the top of the support plate 14. A hydraulic cylinder 17 is connected to the top of the adjustment assembly mounting frame 16. The output end of the hydraulic cylinder 17 passes through the adjustment assembly mounting frame 16 and is connected to an adjustment assembly 18, which allows the workpiece to move forward, backward, left and right to cooperate with the overall welding work. A guide rod 19 is connected to the top of the adjustment assembly 18. The guide rod 19 is slidably connected to the adjustment assembly mounting frame 16. A control cabinet 21 is connected to one side of the frame 1. Reference Figure 3 As shown, a transformer 23 is connected inside the frame 1. Two sets of copper strips 24 are connected to one side of the transformer 23. One end of each copper strip 24 is connected to a lower electrode assembly 25 and an upper electrode assembly 26, respectively. A lower hydraulic cylinder 22 is connected to one side of the welding part 2 at the machine head. The output end of the lower hydraulic cylinder 22 is connected to the upper electrode assembly 26. The lower electrode assembly 25 and the upper electrode assembly 26 are mature components in the prior art, so they are not described in detail in the specification. An industrial camera 30 is connected to the bottom of the upper electrode assembly 26 to monitor the accuracy of the welding position, thereby driving the adjustment component 18 to adjust the workpiece so that the nut is aligned with the welding position.

[0017] Reference Figure 7 and Figure 8As shown, the connecting frame 5 includes a connector 51 fixedly mounted on one side of the upper fixed frame 4. A traction rod 52 is slidably mounted on one side of the connector 51. A fixing clamp 53 is connected to the bottom end of the traction rod 52. A return spring 54 is connected between the upper end of the traction rod 52 and the connector 51. Side plates 56 are connected to both sides of the fixing clamp 53. The side plates 56 are fixedly connected to the upper electrode assembly 26. The screening assembly 6 is connected between the fixing clamps 53. The connecting frame 5 is fixed to one side of the fixed frame 4 by the connector 51. The screening assembly 6 is connected by the fixing clamp 53. When the upper electrode assembly 26 moves down, the screening assembly 6 moves down by the 56. At the same time, the traction rod 52 slides down by the fixing clamp 53 and compresses the return spring 54. When the screening assembly 6 returns to its original position, the elasticity of the return spring 54 plays a role in assisting stability.

[0018] Reference Figure 7 As shown, the screening assembly 6 includes a storage frame 61, a movable spring plate 62 connected between the inner walls of the storage frame 61, a bottom plate 63 connected to the bottom end of the storage frame 61, a voice coil motor 64 connected between the bottom plate 63 and the movable spring plate 62, a discharge trough 65 connected to one end of the storage frame 61, and discharge components connected to both sides of the discharge trough 65. The nut is placed on the top surface of the movable spring plate 62, and then the voice coil motor 64 is started to drive the movable spring plate 62 to vibrate, thereby driving the nut to slide slowly towards the discharge trough 65. A closing end is provided on one side of the discharge trough 65, which can allow the nut to enter the discharge trough 65 in an orderly manner.

[0019] Reference Figure 9 As shown, the discharge assembly includes hub motors 8 connected to both sides of the discharge trough 65. A conveyor belt 9 is sleeved between the hub motors 8. A strong magnet 10 is embedded in the inner side of the conveyor belt 9. When the nut enters the discharge trough 65, the hub motors 8 drive the conveyor belt 9 to rotate, and the conveyor belt 9 drives the strong magnet 10 to move. The strong magnet 10 attracts the nut to the welding joint 111, placing it directly below the electrode rod in the upper electrode assembly 26 and above the workpiece. Then, the upper electrode assembly 26 presses down to perform the welding work. The 65 is made of aluminum alloy, which will not affect the attraction and traction effect of the strong magnet 10 on the nut. When the strong magnet 10 moves with the conveyor belt 9 to the nut directly below the positioning cylinder 7, the positioning cylinder 7 retracts and releases the nut. The nut then moves with the strong magnet 10. At the same time, the positioning cylinder 7 moves down to block or press down on the subsequent nut.

[0020] Reference Figure 9 As shown, a guide hole 222 is provided on one side of the discharge trough 65. A limit bolt 11 is slidably arranged between the guide holes 222. A nut 12 is connected to one end of the limit bolt 11. The height of the limit bolt 11 is adjusted through the guide hole 222. After the adjustment is completed, the nut 12 is rotated to position the limit bolt 11 so that the height of the limit bolt 11 only allows one nut to pass through.

[0021] Reference Figure 6 As shown, the pallet 14 is fixedly installed on one side of the lower fixed frame 13 via 141. The top material assembly 15 is slidably disposed at the bottom end of the pallet 14. The top end of the pallet 14 has a through hole corresponding to the lower electrode assembly 25. When the workpiece plate is above the pallet 14, the motor rod in the lower electrode assembly 25 abuts against the workpiece through the through hole.

[0022] Reference Figure 6 As shown, the top material assembly 15 includes a crossbeam plate 151. Multiple sets of rollers 152 are rotatably mounted on the top of the crossbeam plate 151. A guide rod 153 is connected to the top of the crossbeam plate 151. A traction spring 154 is sleeved and connected between the bottom end of the guide rod 153 and the support plate 14. A support foot tube 161 is connected to the bottom end of the adjustment assembly mounting frame 16. The top end of the guide rod 153 passes through the support plate 14 and extends into the support foot tube 161. A signal receiver 162 is connected to the top of the adjustment assembly mounting frame 16. The adjustment assembly 18 is located inside the bottom end of the adjustment assembly mounting frame 16. When the hydraulic cylinder 17 extends and pushes the adjustment assembly 18 downward, it will press the workpiece down to the top of the support plate 14. At the same time, the workpiece will press down on the rollers 152 in the top material assembly 15. When the adjustment assembly 18 rises, the traction spring 154 pulls the crossbeam plate 151 upward, so that the rollers 152 lift the workpiece and disconnect the workpiece from the support plate 14.

[0023] Reference Figure 4 and Figure 6 As shown, the adjustment assembly 18 includes a C-frame 181, a drive belt 182 connected to the inner side of the C-frame 181, an auxiliary frame 183 connected to the back side of the C-frame 181, a push cylinder 184 connected to one side of the auxiliary frame 183, the output end of the push cylinder 184 passing through the auxiliary frame 183 and connected to a backing plate 185, a guide rod 20 connected to one side of the backing plate 185, and the guide rod 20 slidingly connected to the auxiliary frame 183. The workpiece (such as a sheet metal) is placed on the pallet 14 and positioned above the roller 152. The weld on the workpiece is monitored by an industrial camera 30. When the hydraulic cylinder 17 extends and pushes the C-shaped frame 181 downward, the drive belt 182 first contacts the workpiece surface. The drive belt 182 drives the workpiece to move back and forth, and the push cylinder 184 extends and pushes the abutment plate 185. The abutment plate 185 has a chamfered side, which can push the thinner workpiece to move and clamp it on both sides of the workpiece. Through the extension and retraction of the push cylinders 184 on both sides, the workpiece can be pushed to move left and right, thereby driving the workpiece to adjust the welding position. The support plate 14 has notches on both sides corresponding to the adjustment component 18 to meet the adjustment of the workpiece during the processing of thinner workpieces.

[0024] Working principle: In use, the operator places a batch of nuts to be welded into the storage frame 61 of the screening assembly 6, while simultaneously placing the plate or profile workpiece to be welded on the pallet 14, above the roller 152 of the top material assembly 15. After starting the equipment, the control cabinet 21 controls the coordinated operation of each component. The voice coil motor 64 drives the movable spring plate 62 to vibrate at high frequency, causing the nuts in the storage frame 61 to gradually move towards the discharge chute 65 and arrange them in an orderly manner. After the nuts enter the discharge chute 65, the hub motor 8 drives the conveyor belt 9 to rotate. The strong magnet 10 on the inner side of the conveyor belt 9 attracts the nuts, precisely conveying them along the discharge chute 65. The nut is fed to the welding joint 111, positioning it directly below the upper electrode assembly 26. The positioning cylinder 7 then actuates, blocking or limiting subsequent nuts to ensure only one nut enters the welding station at a time. The industrial camera 30 captures real-time images of the welding position on the workpiece surface and transmits the signals to the control cabinet 21. The control cabinet 21 analyzes and determines whether the preset welding point on the workpiece is aligned with the welding axes of the upper electrode assembly 26 and the lower electrode assembly 25. If a deviation exists, the control cabinet 21 drives the adjustment component 18, and the hydraulic cylinder 17 pushes the C-shaped frame 181 downwards, causing its inner drive belt 182 to contact the workpiece surface. The rotating belt 182 drives the workpiece to move back and forth, while the pushing cylinders 184 on both sides drive the abutment plate 185 to extend and retract, thus moving the workpiece left and right. This precisely adjusts the welding point on the workpiece to be directly below the electrode. After the position is adjusted, the downward hydraulic cylinder 22 drives the upper electrode assembly 26 to move downward. During the downward movement, the upper electrode assembly 26 drives the connecting frame 5 and the entire screening assembly 6 to move downward synchronously through the side plate 56. The electrode rod of the upper electrode assembly 26 passes through the welding port 111 of the discharge trough 65, pressing the nut tightly against the surface of the workpiece. At the same time, the bottom of the workpiece is in close contact with the electrode rod of the lower electrode assembly 25. 3. The upper electrode assembly 26 and the lower electrode assembly 25 are energized through the copper strip 24. The nut and the workpiece are welded together by resistance heating. After the single-point welding is completed, the upper electrode assembly 26 rises and the reset spring 54 assists the screen assembly 6 to reset. At this time, the traction spring 154 of the top material assembly 15 pulls the crossbeam plate 151 to move upward. The roller 152 slightly lifts the workpiece from the surface of the support plate 14 to reduce the friction when the workpiece moves. The adjustment assembly 18 moves again to move the workpiece to the next preset welding position. At the same time, the screen assembly 6 sends out the next nut. The above detection, adjustment and welding steps are repeated until all welding operations are completed.

Claims

1. A welding device for nut installation, comprising a frame (1), characterized in that: The top of the frame (1) is connected to a machine head weldment (2) and a motor weldment (3). An upper fixing frame (4) is connected to one side of the machine head weldment (2). A connecting frame (5) is connected to one side of the upper fixing frame (4). A screening assembly (6) is connected to one side of the connecting frame (5). A discharge assembly is connected to one end of the screening assembly (6). A positioning cylinder (7) is connected to the top of one side of the screening assembly (6). A lower fixing frame (13) is connected to one side of the motor weldment (3). A support plate (14) is connected to the top of the lower fixing frame (13). The pallet (14) is connected to a top material assembly (15) on both sides. The top of the pallet (14) is connected to an adjustment assembly mounting frame (16). The top of the adjustment assembly mounting frame (16) is connected to a hydraulic cylinder (17). The output end of the hydraulic cylinder (17) passes through the adjustment assembly mounting frame (16) and is connected to an adjustment assembly (18). The top of the adjustment assembly (18) is connected to a guide rod (19). The guide rod (19) is slidably connected to the adjustment assembly mounting frame (16). The frame (1) is connected to a control cabinet (21) on one side. A transformer (23) is connected inside the frame (1). Two sets of copper strips (24) are connected to one side of the transformer (23). One end of each of the two copper strips (24) is connected to a lower electrode assembly (25) and an upper electrode assembly (26). A lower hydraulic cylinder (22) is connected to one side of the head weldment (2). The output end of the lower hydraulic cylinder (22) is connected to the upper electrode assembly (26). An industrial camera (30) is connected to the bottom end of the upper electrode assembly (26).

2. The welding device for nut installation according to claim 1, characterized in that: The connecting frame (5) includes a connector (51) fixedly mounted on one side of the upper fixed frame (4). A traction rod (52) is slidably mounted on one side of the connector (51). A fixing clamp (53) is connected to the bottom end of the traction rod (52). A return spring (54) is connected between the upper end of the traction rod (52) and the connector (51). Side plates (56) are connected to both sides of the fixing clamp (53). The side plates (56) are fixedly connected to the upper electrode assembly (26). The screening assembly (6) is connected between the fixing clamps (53).

3. The welding device for nut installation according to claim 2, characterized in that: The screening assembly (6) includes a storage frame (61), a movable spring plate (62) is connected between the inner walls of the storage frame (61), a bottom plate (63) is connected to the bottom end of the storage frame (61), a voice coil motor (64) is connected between the bottom plate (63) and the movable spring plate (62), a discharge chute (65) is connected to one end of the storage frame (61), and the discharge assembly is connected to both sides of the discharge chute (65).

4. The welding device for nut installation according to claim 3, characterized in that: The discharge assembly includes hub motors (8) connected to both sides of the discharge chute (65), a conveyor belt (9) is sleeved between the hub motors (8), and a strong magnet (10) is embedded in the inner side of the conveyor belt (9).

5. A welding device for nut installation according to claim 5, characterized in that: A welding port (111) is provided on one side of the discharge trough (65) corresponding to the upper electrode assembly (26). A guide hole (222) is provided on one side of the discharge trough (65). A limit bolt (11) is slidably provided between the guide holes (222). A nut (12) is connected to one end of the limit bolt (11).

6. The welding device for nut installation according to claim 1, characterized in that: The bottom end of the tray (14) is connected to a bracket (141), the bracket (141) is fixedly installed on one side of the lower fixing frame (13), the top material assembly (15) is slidably installed at the bottom end of the tray (14), and the top end of the tray (14) has a through hole corresponding to the lower electrode assembly (25).

7. The welding device for nut installation according to claim 6, characterized in that: The top material assembly (15) includes a crossbeam plate (151), with multiple sets of rollers (152) rotatably mounted on the top of the crossbeam plate (151). A guide rod (153) is connected to the top of the crossbeam plate (151), and a traction spring (154) is sleeved between the bottom end of the guide rod (153) and the support plate (14). A support foot tube (161) is connected to the bottom end of the adjustment assembly mounting frame (16). The top end of the guide rod (153) passes through the support plate (14) and extends into the support foot tube (161). A signal receiver (162) is connected to the top end of the adjustment assembly mounting frame (16), and the adjustment assembly (18) is located inside the bottom end of the adjustment assembly mounting frame (16).

8. The welding device for nut installation according to claim 7, characterized in that: The adjustment component (18) includes a C-shaped frame (181), a drive belt (182) is connected to the inner side of the C-shaped frame (181), an auxiliary frame (183) is connected to the back side of the C-shaped frame (181), a push cylinder (184) is connected to one side of the auxiliary frame (183), the output end of the push cylinder (184) passes through the auxiliary frame (183) and is connected to a stop plate (185), a guide rod (20) is connected to one side of the stop plate (185), and the guide rod (20) is slidably connected to the auxiliary frame (183).

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