Nut projection welding machine

Abstract

The utility model relates to the technical field of welding machines, in particular to a nut projection welding machine which comprises a machine base, a conveying mechanism, a jig, a feeding mechanism, a projection welding device and a material receiving mechanism, a quick release structure is arranged at the conveying end of the conveying mechanism, the jig is arranged on the quick release structure, a feeding mechanism is movably arranged above the feeding mechanism and the jig, and the projection welding device is arranged on the feeding mechanism. The projection welding device comprises a projection welding frame, an upper projection welding electrode mechanism and a lower projection welding electrode mechanism, a welding space for a jig to move can be formed between the upper projection welding electrode mechanism and the lower projection welding electrode mechanism, a nut gun is movably arranged above the conveying mechanism, and the nut gun is obliquely aligned with a telescopic positioning pin on a lower electrode of the lower projection welding electrode mechanism. And a discharging mechanism is movably arranged above the receiving mechanism and the jig. Material feeding, nut supply, nut welding and product discharging can be automatically completed, the nut welding efficiency of the materials is improved, the jig can be rapidly disassembled, assembled and replaced, maintenance is convenient and fast, and machine compatibility is good.

Description

Technical Field

[0001] The utility model relates to the technical field of welding machines, in particular to a nut projection welder. Background Art

[0002] A nut projection welder is used to weld nuts onto materials (workpieces). The structures of nut projection welders in the prior art vary, and their functions are also different. In the prior patent, the Chinese patent document with the application number 202311269247.9 discloses a fully automatic nut welding device for automobile stamping parts, which includes a welding machine, a feeding conveyor line, a robot module, a welding fixture, a blanking mechanism, a blanking conveyor line, and a nut conveyor. The feeding conveyor line is a storage conveyor line for storing and feeding workpieces. The robot module, the welding fixture, and the nut conveyor are all arranged on the welding machine. The robot module is used to take out the workpieces on the feeding conveyor line and place them on the welding fixture. The welding fixture is used to position the workpieces. The nut conveyor is used to automatically feed nuts. The blanking mechanism is arranged on the welding fixture and is used to take out the welded workpieces and place them on the blanking conveyor line. The blanking conveyor line is arranged parallel to the feeding conveyor line and is used to convey the workpieces to the finished product box. This patent document can realize the automatic loading and unloading of workpieces and nuts, achieve fully automatic nut welding, reduce the labor intensity of workers, and improve the welding efficiency and welding quality. However, since the welding fixture is fixed on the welding machine, the welding machine can only weld nuts at specific positions of the materials on the welding fixture, and the use is limited. Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Utility Model

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a nut projection welder.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A nut projection welder includes a machine base, a conveying mechanism installed on the machine base, a fixture connected to the conveying end of the conveying mechanism, and a feeding mechanism, a projection welding device, and a blanking mechanism arranged in sequence along the conveying direction of the conveying mechanism. A quick-release structure is arranged at the conveying end of the conveying mechanism, and the fixture is installed on the quick-release structure. A feeding mechanism is movably arranged above the fixture and the feeding mechanism. The projection welding device includes a projection welding frame, an upper projection welding electrode mechanism installed on the projection welding frame, and a lower projection welding electrode mechanism arranged below the upper projection welding electrode mechanism. A welding space for the fixture to move can be formed between the upper projection welding electrode mechanism and the lower projection welding electrode mechanism. A nut gun is movably arranged above the conveying mechanism, and the nut gun is inclined to align with a telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism. A blanking mechanism is movably arranged above the fixture and the blanking mechanism.

[0006] Further, the quick-release structure includes a base installed at the conveying end of the conveying mechanism, a lifting plate arranged to be lifted and lowered on the base, a quick-release lifting driver arranged between the base and the lifting plate and used to drive the lifting and lowering of the lifting plate, and a pressing mechanism installed on the lifting plate. The base is provided with a lifting cavity, the lifting plate is located at the lifting cavity, a linear roller group is rotatably connected to the top surface of the base, on one side of the jig supported by the lifting plate, the other side of the jig is located above the linear roller group and extends outside the lifting plate, and the pressing mechanism is used to press the jig on the lifting plate.

[0007] Further, an elastic buffer is arranged between the inner wall of the lifting cavity and the lifting plate.

[0008] Further, the lifting plate is provided with a positioning hole, a positioning cylinder is installed on the top surface of the jig, a positioning column is installed on the piston rod of the positioning cylinder, the jig is provided with a through hole communicating with the positioning hole, the positioning column is slidably connected to the inner wall of the through hole, and the positioning column can be inserted into the positioning hole.

[0009] Further, the base is in a U shape, the lifting cavity is located in the middle of the base, linear roller groups are rotatably connected to the top surfaces of both side plates of the base, the number of jigs and the number of pressing mechanisms are both two, and the two groups of linear roller groups, the two pressing mechanisms and the two jigs are respectively arranged in one-to-one correspondence.

[0010] Further, the number of feeding mechanisms and the number of loading mechanisms are both two, the two feeding mechanisms are respectively located on both sides of the conveying mechanism, and the two feeding mechanisms, the two loading mechanisms and the two jigs are respectively arranged in one-to-one correspondence.

[0011] Further, the number of upper projection welding electrode mechanisms and the number of lower projection welding electrode mechanisms are both two, the two upper projection welding electrode mechanisms are respectively arranged in one-to-one correspondence with the two lower projection welding electrode mechanisms, and the two upper projection welding electrode mechanisms are respectively arranged in one-to-one correspondence with the two jigs.

[0012] Further, the jig includes a carrier plate, a downward pressing mechanism installed on the top surface of the carrier plate, and a push-pull handle installed at one end of the carrier plate. A positioning carrier cavity and a through hole are arranged on the top surface of the carrier plate, the through hole is located in the positioning carrier cavity, and the through hole is used for the lower electrode of the lower projection welding electrode mechanism to be inserted, and the downward pressing mechanism is used to press the material in the positioning carrier cavity.

[0013] Further, the feeding mechanism includes a feeding bin installed on the machine base, a feeding plate arranged to be lifted and lowered in the feeding bin, a feeding lifting driver installed on the machine base and used to drive the feeding plate to lift and lower in the feeding bin, and a magnetic separator arranged at the top port of the feeding bin; the loading mechanism includes a translation loading module arranged above the feeding bin and the conveying mechanism, a lifting loading module connected to the translation end of the translation loading module, a loading plate installed at the lifting end of the lifting loading module, and a loading magnetic attraction block or / and a clamping jaw module respectively installed on the loading plate.

[0014] Furthermore, the material receiving mechanism includes a transport vehicle, a plurality of limiting columns installed on the transport vehicle, and a positioning pin installed on the transport vehicle. The machine base is provided with a positioning slot, the positioning pin is inserted into the positioning slot, and the plurality of limiting columns form a plurality of material receiving cavities.

[0015] Advantages of the present utility model: In practical applications, the feeding mechanism supplies materials to the loading mechanism, the loading mechanism loads the materials onto the fixture, the conveying mechanism transports the fixture carrying the materials to the welding space of the projection welding device, so that the upper projection welding electrode mechanism and the lower projection welding electrode mechanism are respectively located on the upper and lower sides of the welding position of the material to be welded. The lower electrode of the lower projection welding electrode mechanism rises to abut against the bottom surface of the welding position of the material carried by the fixture, and the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism passes through the hole position of the material. At this time, the nut gun moves to the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism and supplies the nut to the welding position of the material. The telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism passes through the threaded hole of the nut to position the nut. Then, the upper electrode of the upper projection welding electrode mechanism moves down until the upper electrode of the upper projection welding electrode mechanism cooperates with the lower electrode of the lower projection welding electrode mechanism to weld the nut at the welding position of the material. During the welding process, the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism will retract under the downward pressure of the upper electrode of the upper projection welding electrode mechanism. With the coordinated cooperation of the conveying mechanism and the projection welding device, the nut is welded to multiple positions of the material to form a product. Then, the conveying mechanism transports the fixture carrying the product to the material receiving mechanism, the unloading mechanism unloads the product to the material receiving mechanism, and the material receiving mechanism collects the product. Among them, since the fixture is installed on the conveying mechanism through a quick-release structure, the quick disassembly and assembly of the fixture can be realized, the maintenance is fast, and the fixture with a corresponding structure can be replaced according to different materials to meet the requirements of welding nuts for different materials, and the machine has good compatibility. The present utility model can automatically complete the feeding of materials, the supply of nuts, the welding of nuts, and the unloading of products, improving the efficiency of welding nuts on materials. As the fixture drives the material to move, the projection welding device can sequentially weld nuts at multiple positions of the material, which is especially suitable for long strip-shaped materials. Moreover, the fixture can be quickly disassembled, assembled and replaced, the maintenance is convenient, and the machine has good compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of another perspective of the present utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the pressing mechanism, the conveying mechanism, the quick-release structure and the fixture of the present utility model.

[0019] Figure 4Schematic three-dimensional structure diagram of the quick-release structure of the present utility model.

[0020] Figure 5 Schematic three-dimensional structure diagram of the fixture of the present utility model.

[0021] Figure 6 Schematic three-dimensional structure diagram of the feeding mechanism of the present utility model.

[0022] Figure 7 Schematic three-dimensional structure diagram of the loading mechanism of the present utility model.

[0023] Figure 8 Schematic three-dimensional structure diagram of the material receiving mechanism of the present utility model.

[0024] Explanation of reference numerals:

[0025] 1. Machine base; 2. Conveyor mechanism; 3. Fixture; 4. Feeding mechanism; 5. Projection welding device; 6. Material receiving mechanism; 7. Quick-release structure; 8. Loading mechanism; 9. Projection welding frame; 10. Upper projection welding electrode mechanism; 11. Lower projection welding electrode mechanism; 12. Nut feeding gun; 13. Unloading mechanism; 14. Base; 15. Lifting plate; 16. Quick-release lifting driver; 17. Pressing mechanism; 18. Lifting cavity; 19. Linear roller group; 20. Elastic buffer; 21. Positioning hole; 22. Positioning cylinder; 23. Carrier plate; 24. Pressing-down mechanism; 25. Push-pull handle; 26. Positioning carrier cavity; 27. Through hole; 28. Feeding bin; 29. Feeding plate; 30. Feeding lifting driver; 31. Magnetic separator; 32. Translational loading module; 33. Lifting loading module; 34. Loading plate; 35. Loading magnetic attraction block; 36. Claw module; 37. Conveyor cart; 38. Limit post; 39. Positioning pin. Detailed implementation manners

[0026] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present utility model.

[0027] As Figures 1 to 8As shown in the figure, a nut projection welder provided by the utility model includes a machine base 1, a conveying mechanism 2 installed on the machine base 1, a fixture 3 connected to the conveying end of the conveying mechanism 2, and a feeding mechanism 4, a projection welding device 5 and a material collecting mechanism 6 arranged in sequence along the conveying direction of the conveying mechanism 2. A quick-release structure 7 is provided at the conveying end of the conveying mechanism 2, and the fixture 3 is installed on the quick-release structure 7. A feeding mechanism 8 is movably arranged above the feeding mechanism 4 and the fixture 3. The projection welding device 5 includes a projection welding frame 9 installed on the machine base 1, an upper projection welding electrode mechanism 10 installed on the projection welding frame 9, and a lower projection welding electrode mechanism 11 arranged below the upper projection welding electrode mechanism 10. A welding space for the movement of the fixture 3 can be formed between the upper projection welding electrode mechanism 10 and the lower projection welding electrode mechanism 11. A nut gun 12 is movably arranged above the conveying mechanism 2, and the nut gun 12 is obliquely aligned with the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism 11. A blanking mechanism 13 is movably arranged above the material collecting mechanism 6 and the fixture 3.

[0028] The material in this embodiment can be a sill beam reinforcement plate. In practical applications, the feeding mechanism 4 supplies materials to the loading mechanism 8. The loading mechanism 8 loads the materials onto the fixture 3. The conveying mechanism 2 conveys the fixture 3 carrying the materials to the welding space of the projection welding device 5, so that the upper projection welding electrode mechanism 10 and the lower projection welding electrode mechanism 11 are respectively located on the upper and lower sides of the welding position of the material. The lower electrode of the lower projection welding electrode mechanism 11 rises to abut against the bottom surface of the welding position of the material carried by the fixture 3, and the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism 11 passes through the hole position of the material. At this time, the nut gun 12 moves to the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism 11 and supplies the nut to the welding position of the material. The telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism 11 passes through the threaded hole of the nut to position the nut. Then, the upper electrode of the upper projection welding electrode mechanism 10 moves downward until the upper electrode of the upper projection welding electrode mechanism 10 cooperates with the lower electrode of the lower projection welding electrode mechanism 11 to weld the nut at the welding position of the material. During the welding process, the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism 11 will retract under the downward pressure of the upper electrode of the upper projection welding electrode mechanism 10. With the coordinated cooperation of the conveying mechanism 2 and the projection welding device 5, the nuts are welded at multiple positions of the material to form a product. Then, the conveying mechanism 2 conveys the fixture 3 carrying the product to the unloading mechanism 6. The unloading mechanism 13 unloads the product to the unloading mechanism 6, and the unloading mechanism 6 collects the product. Among them, since the fixture 3 is installed on the conveying mechanism 2 through the quick-release structure 7, the quick disassembly and assembly of the fixture 3 can be realized, the maintenance is fast, and the fixture 3 with corresponding structures can be replaced according to different materials to meet the requirements of welding nuts for different materials, and the machine has good compatibility. The utility model can automatically complete the feeding of materials, the supply of nuts, the welding of nuts and the unloading of products, improve the efficiency of welding nuts on materials. As the fixture 3 drives the material to move, the projection welding device 5 can successively weld nuts at multiple positions of the material, which is particularly suitable for long strip-shaped materials. Moreover, the fixture 3 can be quickly disassembled, assembled and replaced, the maintenance is convenient, and the machine has good compatibility.

[0029] Specifically, a nut supply mechanism is arranged on one side of the conveying mechanism 2, and the nut supply mechanism supplies nuts to the nut gun 12; specifically, the nut supply mechanism belongs to the prior art and will not be elaborated here.

[0030] In this embodiment, the quick-release structure 7 includes a base 14 installed at the conveying end of the conveying mechanism 2, a lifting plate 15 arranged to be lifted and lowered on the base 14, a quick-release lifting driver 16 arranged between the base 14 and the lifting plate 15 and used to drive the lifting and lowering of the lifting plate 15, and a pressing mechanism 17 installed on the lifting plate 15. The base 14 is provided with a lifting cavity 18. The lifting plate 15 is located at the lifting cavity 18. The top surface of the base 14 is rotatably connected with a linear roller group 19. On one side of the fixture 3 supported by the lifting plate 15, the other side of the fixture 3 is located above the linear roller group 19 and extends outside the lifting plate 15. The pressing mechanism 17 is used to press the fixture 3 onto the lifting plate 15. Specifically, the pressing mechanism 17 includes a pressing cylinder and a pressing block installed on the piston rod of the pressing cylinder. The quick-release lifting driver 16 can adopt a cylinder; the linear roller group 19 includes a plurality of rollers arranged in a straight line.

[0031] In practical applications, in the normal state, the quick-release lifting driver 16 raises the lifting plate 15 so that the top surface of the lifting plate 15 is higher than the top surface of the linear roller group 19. The lifting plate 15 supports one side of the fixture 3, and the pressing end of the pressing mechanism 17 presses the fixture 3 onto the lifting plate 15 to realize the installation and fixation of the fixture 3. When it is necessary to disassemble or replace the fixture 3, the quick-release lifting driver 16 drives the lifting plate 15 to descend until the top surface of the lifting plate 15 is flush with the top surface of the linear roller group 19. The bottom surface of the other side of the fixture 3 abuts against the linear roller group 19. At this time, the pressing mechanism 17 releases the pressing on the fixture 3, and the operator pulls the fixture 3 outwards so that the fixture 3 moves outwards relative to the lifting plate 15 and the linear roller group 19. During the movement of the fixture 3, the fixture 3 rolls and abuts against the linear roller group 19 to reduce the frictional resistance of the fixture 3, so that the fixture 3 can be easily disassembled and assembled.

[0032] In this embodiment, an elastic buffer 20 is arranged between the inner wall of the lifting cavity 18 and the lifting plate 15. Specifically, the elastic buffer 20 includes a spring and a guide rod installed on the bottom surface of the lifting plate 15. The guide rod slidably penetrates through the base 14, the spring is sleeved outside the guide rod, and the two ends of the spring are elastically abutted against the bottom surface of the lifting plate 15 and the bottom wall of the lifting cavity 18 respectively.

[0033] During the process of the quick-release lifting driver 16 controlling the lifting and lowering of the lifting plate 15, the elastic buffer 20 plays a role in guiding and buffering and protecting the lifting and lowering of the lifting plate 15, thereby reducing the impact force between the fixture 3 and the linear roller group 19.

[0034] In this embodiment, the lifting plate 15 is provided with a positioning hole 21. A positioning cylinder 22 is installed on the top surface of the jig 3. A positioning column is installed on the piston rod of the positioning cylinder 22. The jig 3 is provided with a through hole communicating with the positioning hole 21. The positioning column is slidably connected to the inner wall of the through hole and can be inserted into the positioning hole 21. When the jig 3 is installed on the lifting plate 15, the positioning cylinder 22 drives the positioning column to insert into the positioning hole 21 to position the jig 3, and then the jig 3 is pressed on the lifting plate 15 by the pressing mechanism 17, ensuring the position accuracy and stability of the assembly of the jig 3 and the lifting plate 15.

[0035] In this embodiment, the base 14 is in a U shape. The lifting cavity 18 is located in the middle of the base 14. Linear roller groups 19 are rotatably connected to the top surfaces of the two side plates of the base 14. The number of jigs 3 and the number of pressing mechanisms 17 are both two. The two linear roller groups 19, the two pressing mechanisms 17 and the two jigs 3 are respectively arranged in one-to-one correspondence; specifically, the number of the feeding mechanisms 4 and the number of the loading mechanisms 8 are both two. The two feeding mechanisms 4 are respectively located on both sides of the conveying mechanism 2. The two feeding mechanisms 4, the two loading mechanisms 8 and the two jigs 3 are respectively arranged in one-to-one correspondence. With this structural design, two or more materials can be loaded and conveyed at one time, improving the loading and conveying efficiency of the materials.

[0036] In this embodiment, the number of the upper projection welding electrode mechanisms 10 and the number of the lower projection welding electrode mechanisms 11 are both two. The two upper projection welding electrode mechanisms 10 are respectively arranged in one-to-one correspondence with the two lower projection welding electrode mechanisms 11, and the two upper projection welding electrode mechanisms 10 are respectively arranged in one-to-one correspondence with the two jigs 3. With this structural design, two or more materials can be welded with nuts at one time, improving the production efficiency.

[0037] In this embodiment, the fixture 3 includes a carrier plate 23, a downward pressing mechanism 24 mounted on the top surface of the carrier plate 23, and a push-pull handle 25 mounted at one end of the carrier plate 23. A positioning carrier cavity 26 and a through hole 27 are provided on the top surface of the carrier plate 23. The through hole 27 is located within the positioning carrier cavity 26 and is used for the lower electrode of the lower convex welding electrode mechanism 11 to insert. The downward pressing mechanism 24 is used to press the material tightly within the positioning carrier cavity 26. Specifically, the downward pressing mechanism 24 includes a spinning cylinder and a downward pressing block mounted on the output end of the spinning cylinder. In practical applications, the feeding mechanism 8 picks up the material and places it into the positioning carrier cavity 26. The positioning carrier cavity 26 positions and supports the material. The hole position of the material is aligned with the through hole 27, and the downward pressing end of the downward pressing mechanism 24 presses the material tightly within the positioning carrier cavity 26. When the conveying mechanism 2 moves the fixture 3 carrying the material to the convex welding device 5, the lower electrode of the lower convex welding electrode mechanism 11 rises and inserts into the through hole 27, so that the lower electrode of the lower convex welding electrode mechanism 11 contacts the bottom surface of the material, and the telescopic positioning pin on the lower electrode of the lower convex welding electrode mechanism 11 passes through the hole position of the material. At this time, the nut gun 12 supplies the nut onto the material, and the telescopic positioning pin on the lower electrode of the lower convex welding electrode mechanism 11 inserts into the threaded hole of the nut to position the material and the nut. The push-pull handle 25 is provided for the operator to push and pull the fixture 3, facilitating the operator to disassemble and assemble the fixture 3.

[0038] In this embodiment, the feeding mechanism 4 includes a feeding bin 28 mounted on the machine base 1, a feeding plate 29 arranged to be lifted within the feeding bin 28, a feeding lifting driver 30 mounted on the machine base 1 and used to drive the feeding plate 29 to lift within the feeding bin 28, and a magnetic separator 31 arranged at the top port of the feeding bin 28. The feeding mechanism 8 includes a translational feeding module 32 arranged above the feeding bin 28 and the conveying mechanism 2, a lifting feeding module 33 connected to the translational end of the translational feeding module 32, a feeding plate 34 mounted on the lifting end of the lifting feeding module 33, and feeding magnetic attraction blocks 35 and / or jaw modules 36 respectively mounted on the feeding plate 34. Specifically, the feeding lifting driver 30 can adopt a vertically arranged lead screw module, the translational feeding module 32 can adopt a horizontally arranged cylinder or lead screw module, the lifting feeding module 33 can adopt a vertically arranged cylinder, the feeding magnetic attraction blocks 35 can adopt electromagnets, and the jaw module 36 can be composed of a finger cylinder and a clamping block.

[0039] The material is made of metal. In actual applications, a large number of materials are stacked in the feeding bin 28. The feeding magnetic block 35 of the feeding mechanism 8 magnetically attracts the materials to pick up the materials. During the process of the translation feeding module 32 and the lifting feeding module 33 cooperating to drive the feeding magnetic block 35 and the materials to move, the jaw module 36 clamps the materials to prevent the materials from shifting relative to the feeding magnetic block 35 due to the inertial force during movement, improving the stability of feeding the materials until the feeding mechanism 8 places the materials on the fixture 3. Every time the feeding mechanism 8 takes away a material, the feeding lifting driver 30 will drive the feeding plate 29 to rise by the height of one material to ensure continuous supply of materials; when the feeding mechanism 8 sucks away the topmost material, the magnetic separator 31 can effectively separate two adjacent materials to avoid the phenomenon of overlapping materials and ensure that one material is fed each time.

[0040] In this embodiment, the receiving mechanism 6 includes a transport vehicle 37, a plurality of limit posts 38 installed on the transport vehicle 37, and a positioning pin 39 installed on the transport vehicle 37. The machine base 1 is provided with a positioning slot. The positioning pin 39 is inserted into the positioning slot, and the plurality of limit posts 38 form a plurality of receiving cavities. The transport vehicle 37 is moved to the receiving position of the machine base 1 so that the positioning pin 39 on the transport vehicle 37 is inserted into the positioning slot of the machine base 1 to position the transport vehicle 37. The blanking mechanism 13 blanks the products into the corresponding receiving cavities, so that the products are stacked in the receiving cavities; the setting of the plurality of receiving cavities increases the number of products collected by the receiving mechanism 6.

[0041] Specifically, the structure of the blanking mechanism 13 is the same as that of the feeding mechanism 8, and the number of the blanking mechanisms 13 is two, which improves the blanking of the products.

[0042] All the technical features in this embodiment can be freely combined according to actual needs.

[0043] The above embodiments are the preferred implementation solutions of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A nut projection welding machine, characterized in that: It includes a machine base (1), a conveying mechanism (2) installed on the machine base (1), a fixture (3) connected to the conveying end of the conveying mechanism (2), and a feeding mechanism (4), a projection welding device (5), and a receiving mechanism (6) arranged in sequence along the conveying direction of the conveying mechanism (2). A quick-release structure (7) is provided at the conveying end of the conveying mechanism (2), and the fixture (3) is installed on the quick-release structure (7). A feeding mechanism (8) is movably arranged above the feeding mechanism (4) and the fixture (3). The projection welding device (5) includes a projection welding frame (9), an upper projection welding electrode mechanism (10) installed on the projection welding frame (9), and a lower projection welding electrode mechanism (11) arranged below the upper projection welding electrode mechanism (10). A welding space for the fixture (3) to move can be formed between the upper projection welding electrode mechanism (10) and the lower projection welding electrode mechanism (11). A nut gun (12) is movably arranged above the conveying mechanism (2), and the nut gun (12) is inclinedly aligned with the telescopic positioning pin on the lower electrode of the lower projection welding electrode mechanism (11). A blanking mechanism (13) is movably arranged above the receiving mechanism (6) and the fixture (3).

2. A nut projection welding machine according to claim 1, characterized in that: The quick-release structure (7) includes a base (14) installed at the conveying end of the conveying mechanism (2), a lifting plate (15) arranged to be lifted and lowered on the base (14), a quick-release lifting driver (16) arranged between the base (14) and the lifting plate (15) and used to drive the lifting and lowering of the lifting plate (15), and a pressing mechanism (17) installed on the lifting plate (15). The base (14) is provided with a lifting cavity (18), the lifting plate (15) is located at the lifting cavity (18), a linear roller group (19) is rotatably connected to the top surface of the base (14), one side of the fixture (3) is supported by the lifting plate (15), and the other side of the fixture (3) is located above the linear roller group (19) and extends outside the lifting plate (15). The pressing mechanism (17) is used to press the fixture (3) onto the lifting plate (15).

3. A nut projection welding machine according to claim 2, characterized in that: An elastic buffer (20) is arranged between the inner wall of the lifting cavity (18) and the lifting plate (15).

4. A nut projection welding machine according to claim 2, characterized in that: The lifting plate (15) is provided with a positioning hole (21), a positioning cylinder (22) is installed on the top surface of the fixture (3), a positioning column is installed on the piston rod of the positioning cylinder (22), the fixture (3) is provided with a through hole communicating with the positioning hole (21), and the positioning column is slidably connected to the inner wall of the through hole and can be inserted into the positioning hole (21).

5. A nut projection welding machine according to any one of claims 2 to 4, characterized in that: The base (14) is in a U shape, the lifting cavity (18) is located in the middle of the base (14), linear roller groups (19) are rotatably connected to the top surfaces of both side plates of the base (14), the number of fixtures (3) and the number of pressing mechanisms (17) are both two, and the two linear roller groups (19), the two pressing mechanisms (17), and the two fixtures (3) are arranged in one-to-one correspondence respectively.

6. A nut projection welding machine according to claim 5, characterized in that: The number of feeding mechanisms (4) and the number of feeding mechanisms (8) are both two, the two feeding mechanisms (4) are respectively located on both sides of the conveying mechanism (2), and the two feeding mechanisms (4), the two feeding mechanisms (8), and the two fixtures (3) are arranged in one-to-one correspondence respectively.

7. A nut projection welding machine according to claim 6, characterized in that: The number of upper projection welding electrode mechanisms (10) and the number of lower projection welding electrode mechanisms (11) are both two; the two upper projection welding electrode mechanisms (10) are respectively arranged in a one-to-one correspondence with the two lower projection welding electrode mechanisms (11); and the two upper projection welding electrode mechanisms (10) are respectively arranged in a one-to-one correspondence with the two jigs (3).

8. A nut projection welding machine according to claim 1, characterized in that: The jig (3) comprises a carrier plate (23), a pressing mechanism (24) mounted on the top surface of the carrier plate (23), and a push-pull handle (25) mounted on one end of the carrier plate (23); the top surface of the carrier plate (23) is provided with a positioning cavity (26) and a through hole (27); the through hole (27) is located in the positioning cavity (26); the through hole (27) is used for inserting the lower electrode of the lower projection welding electrode mechanism (11); the pressing mechanism (24) is used for pressing the material tightly in the positioning cavity (26).

9. A nut projection welding machine according to claim 1, characterized in that: The feeding mechanism (4) comprises a feeding bin (28) mounted on a machine base (1), a feeding plate (29) lifted and arranged in the feeding bin (28), a feeding lifting driver (30) mounted on the machine base (1) and used for driving the feeding plate (29) to lift and lower in the feeding bin (28), and a magnetic separator (31) arranged at the top port of the feeding bin (28); the loading mechanism (8) comprises a translation loading module (32) arranged above the feeding bin (28) and the conveying mechanism (2), a lifting loading module (33) connected to the translation end of the translation loading module (32), a loading plate (34) mounted on the lifting end of the lifting loading module (33), and a loading magnetic suction block (35) or / and a clamping claw module (36) respectively mounted on the loading plate (34).

10. A nut projection welding machine according to claim 1, characterized in that: The material receiving mechanism (6) comprises a conveying vehicle (37), a plurality of limiting columns (38) mounted on the conveying vehicle (37) and a positioning pin (39) mounted on the conveying vehicle (37); a machine base (1) is provided with a positioning slot, the positioning pin (39) is inserted into the positioning slot, and the plurality of limiting columns (38) form a plurality of material receiving chambers.

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