A tapping device for producing press riveting nuts

Abstract

The present invention discloses a tapping device for the production of press riveting nuts, which relates to the technical field of nut processing. It includes a workbench, and a circular part protrudes upward from the upper end of the workbench. A rotating plate is rotatably installed on the upper end of the circular part, and the rotating plate is driven by the motor shaft of a stepping motor fixedly installed at the lower end of the workbench. Two bearing platforms are symmetrically and fixedly connected to both ends of the rotating plate. Adjusting circular platforms and supporting blocks are respectively fixedly installed at the top of the workbench below the two bearing platforms. The beneficial effects of the present invention are: during operation, the nut products to be processed are placed on the bearing platforms, and at the same time, the nut products are located between two positioning blocks. The two positioning blocks in the two positioning mechanisms cooperate to approach each other to preliminarily clamp and position the nut products to be processed, so that the nut products to be processed can be located at the center position of the bearing platform. The bearing platform drives the nut products to be processed to rotate to the directly below of the tapping head for tapping processing.

Description

Technical Field

[0001] The present invention relates to the technical field of nut processing, and specifically relates to a tapping device for the production of press riveting nuts. Background Art

[0002] The press riveting nut, also known as a riveting nut and a self-locking nut, is a nut applied to thin plates or sheet metals. It has a circular shape and has embossed teeth and a guiding groove at one end. Its principle is that the embossed teeth are pressed into the pre-set hole positions of the sheet metal. Generally, the diameter of the pre-set hole is slightly smaller than the embossed teeth of the press riveting nut. Through pressure, the embossed teeth of the press riveting nut are squeezed into the plate, causing plastic deformation around the pre-set hole. The deformed material is squeezed into the guiding groove, thereby achieving a locking effect.

[0003] During the processing of nuts, tapping is required. When tapping nuts, fixtures are needed to fix the nuts. However, when the existing tapping devices process nuts with different diameters, different fixtures need to be replaced, and the fixtures cannot adapt to nuts of different sizes. When the existing fixtures position the press riveting nuts, the tapping head needs to be manually placed on the processing table first, and then clamped and positioned by the fixtures. Manual placement easily causes deviation in the position of the nut, making it impossible to align the tapping head with the center position of the nut. Often, multiple adjustments are required, greatly affecting the work efficiency. Moreover, during the manual placement process, once the tapping device is accidentally started by touching it, it will cause certain harm to the staff, presenting a great potential safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide a tapping device for the production of press riveting nuts to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A tapping device for the production of press riveting nuts, including a workbench. A circular part protrudes upward from the upper end of the workbench. A rotating plate is rotatably installed on the upper end of the circular part. The rotating plate is driven by the motor shaft of a stepping motor fixedly installed at the lower end of the workbench. Symmetrically fixed connections are provided at both ends of the rotating plate with bearing platforms. On the top of the workbench, an adjusting turntable and a support block are respectively fixedly installed below the two bearing platforms. Nut products are arranged on the bearing platforms. Positioning mechanisms for limiting the nut products are symmetrically installed on the bearing platforms. An inverted L-shaped support plate is fixedly connected near the support block at the upper end of the workbench. A lifting hydraulic cylinder is fixedly installed at the upper end of the inverted L-shaped support plate. The end of the piston rod of the lifting hydraulic cylinder passes downward through the upper end of the inverted L-shaped support plate and is fixedly connected to a connecting plate. A drill chuck is rotatably installed at the lower end of the connecting plate. The drill chuck is driven by the output shaft of a servo motor fixedly installed at the upper end of the connecting plate. A tapping head is fixedly installed at the lower end of the drill chuck. A clamping mechanism for fixing the nut products is installed below the connecting plate.

[0006] As a further solution of the present invention, convex grooves are symmetrically formed at the upper end of the carrier table. The positioning mechanism includes a guiding optical rod fixedly connected in the convex groove. On one side of the guiding optical rod, a convex block and a return spring are sleeved. The convex block is located at one end of the convex groove close to the inner side. A positioning block is fixedly connected to the upper end of the convex block, and a semi-cylindrical body is fixedly connected to the lower end of the convex block.

[0007] As a further solution of the present invention, the convex blocks are respectively slidably connected to the convex groove and the guiding optical rod. The positioning block is in sliding contact with the upper end of the carrier table. V-shaped clamping grooves are formed at one ends of the two positioning blocks close to each other. Two ends of the return spring are respectively abutted against the convex groove and the convex block.

[0008] As a further solution of the present invention, the clamping mechanism includes a concave lifting seat arranged below the connecting plate. A plurality of connecting round rods are symmetrically and fixedly connected to the upper end of the concave lifting seat. The upper end of each connecting round rod passes through the connecting plate upward and is fixedly connected to a fixing ring. A buffer spring is sleeved on each connecting round rod. Notches are symmetrically formed on the left and right sides of the concave lifting seat. Rectangular blocks are symmetrically and fixedly connected to the front and rear of the top of the inner cavity of the concave lifting seat. Transmission mechanisms are symmetrically installed on the left and right sides of the inner cavity of the concave lifting seat. Extrusion plates are symmetrically and fixedly connected to the lower end of the connecting plate. The extrusion plates are in extrusion contact with the transmission mechanisms, and the lower ends of the extrusion plates are in a slope shape. Extension grooves are symmetrically formed on the left and right sides of the upper end of the carrier table, and communication grooves are formed on the left and right sides of the upper end of the workbench. The extension grooves and the communication grooves are both located directly below the extrusion plates.

[0009] As a further solution of the present invention, the connecting round rods are slidably connected to the connecting plate up and down. Two ends of the buffer spring are respectively abutted against the connecting plate and the concave lifting seat.

[0010] As a further solution of the present invention, the transmission mechanism includes concave transmission plates symmetrically installed on the inner sides of the concave lifting seat. Slide rods are symmetrically inserted through the front and rear sides of the concave transmission plates. Two ends of the slide rod are respectively fixedly connected to the inner side wall of the concave lifting seat and the side surface of the rectangular block. A clamping spring is sleeved on one end of the slide rod close to the rectangular block. One sides of the two concave transmission plates away from each other are in extrusion contact with the extrusion plates. Clamping components are installed on one sides of the two concave transmission plates close to each other. A locking mechanism for locking the clamping components is installed on the upper end of each concave transmission plate.

[0011] As a further solution of the present invention, the concave transmission plates are slidably connected to the slide rods left and right. Two ends of the clamping spring are respectively abutted against the inner side wall of the concave lifting seat and the side surface of the rectangular block.

[0012] As a further solution of the present invention, a circular through hole is provided on the side surface of the concave transmission plate, a limiting groove is provided at the bottom of the groove at the upper end of the concave transmission plate and penetrates downward, the limiting groove penetrates the circular through hole, and guiding grooves are symmetrically penetrated through the front and rear sides of the concave transmission plate. The clamping assembly includes an internal thread sleeve inserted through the circular through hole, and the internal thread sleeve is rotatably connected to the circular through hole. Adjusting sleeves and limiting rings are respectively fixedly sleeved at both ends of the internal thread sleeve;

[0013] A limiting tooth ring is fixedly connected between the adjusting sleeve and the limiting ring on the internal thread sleeve, and the limiting tooth ring is rotatably connected to the limiting groove. The locking mechanism is arranged above the limiting tooth ring. A threaded rod is threadedly connected inside the internal thread sleeve, and a clamping block is fixedly connected to one end of the threaded rod. Guide plates are symmetrically fixedly connected to the side of the clamping block close to the concave transmission plate, and the guide plates are slidably connected to the guiding grooves left and right.

[0014] As a further solution of the present invention, the locking mechanism includes a fixed block fixedly connected to the concave transmission plate. The fixed block is above the limiting groove, a contraction groove is provided at the lower end of the fixed block, a locking bolt is inserted through the upper end of the fixed block, the lower end of the locking bolt extends downward into the contraction groove, and the lower end of the locking bolt is rotatably connected to a locking tooth block through a pin shaft. A plurality of teeth are provided at the lower end of the locking tooth block, the lower end of the locking tooth block extends downward into the limiting groove, and the teeth at the lower end of the locking tooth block are clamped with the limiting tooth ring.

[0015] The locking bolt is threadedly connected to the fixed block, and the locking tooth block is slidably connected to the contraction groove up and down.

[0016] The beneficial effects of the present invention are:

[0017] 1. During operation, the nut product to be processed is placed on the carrier table, and at the same time, the nut product is located between the two positioning blocks. The two positioning blocks in the two positioning mechanisms cooperate to approach each other to initially clamp and position the nut product to be processed, so that the nut product to be processed can be located at the center of the carrier table. The carrier table drives the nut product to be processed to rotate to the position directly below the tapping head for tapping processing; after processing, the carrier table rotates to the adjusting turntable, so that the two positioning blocks in the positioning mechanism move away from each other, and the two positioning blocks release the clamping of the tapped nut product. At this time, the staff removes the tapped nut product from the carrier table, and then places the nut product to be processed on the carrier table. Wait for the previous nut product to be processed, and so on, so that the tapping processing of the nut product can be continuously carried out. The operation is simple and convenient, and the tapping processing of another nut product can be carried out during loading and unloading, greatly improving the work efficiency.

[0018] 2. The positioning mechanism can position the nut product, enabling the nut product to be at the center of the bearing platform, ensuring the accuracy of subsequent processing. At the same time, during the loading and unloading of the nut product, the staff only needs to perform loading and unloading on one bearing platform away from the tapping head, without reaching under the tapping head with the palm, arm, etc., thus avoiding potential safety hazards.

[0019] 3. When tapping the nut product, first, the piston rod of the lifting hydraulic cylinder extends downward to drive the connecting plate to move downward. The connecting plate drives the concave lifting seat, the pressing plate, and the tapping head to move downward synchronously. The pressing plate drives the two transmission mechanisms to approach each other, and the transmission mechanisms drive the two clamping components to approach each other. The two clamping blocks in the two clamping components cooperate to clamp and fix the nut product to be processed. With the cooperation of the two clamping components and the two positioning mechanisms, the nut product to be processed can be accurately positioned at the center of the bearing platform, ensuring the accuracy of subsequent tapping of the nut product to be processed. The tapping head moves downward to perform tapping processing on the nut product. After processing, the piston rod of the lifting hydraulic cylinder drives the connecting plate to move upward, so that the clamping mechanism, the transmission mechanism, and the clamping components move upward to reset and wait for the next processing.

[0020] 4. By loosening the locking of the limit tooth ring by the locking tooth block in the locking mechanism, rotating the adjusting sleeve drives the internal thread sleeve to rotate, thereby adjusting the distance between the two clamping blocks, enabling the clamping blocks to clamp and fix nut products with different diameters, and improving the application range of the tapping equipment; by engaging the locking tooth block in the locking mechanism with the limit tooth ring, the threaded column cannot move left and right along the internal thread sleeve. At this time, the clamping component and the concave transmission plate move or remain stationary synchronously, enabling the clamping component to move synchronously with the transmission mechanism, and thus being able to stably clamp and fix the nut product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the tapping equipment for producing press riveting nuts of the present invention;

[0022] Figure 2 is a side sectional view of the structure of the tapping equipment for producing press riveting nuts of the present invention;

[0023] Figure 3 is Figure 2 an enlarged schematic view of the structure at A in

[0024] Figure 4 is Figure 2 an enlarged schematic view of the structure at B in

[0025] Figure 5 is a side sectional view of the structure of the bearing platform, the connecting plate, the concave lifting seat, and the clamping mechanism of the present invention;

[0026] Figure 6 For Figure 5 The enlarged schematic view of the structure at position C in the figure;

[0027] Figure 7 This is the exploded view of the carrier table, positioning mechanism, connecting plate and clamping mechanism of the present invention;

[0028] Figure 8 This is the exploded view of the transmission mechanism, clamping assembly and locking mechanism of the present invention.

[0029] In the figure: 1. Workbench; 11. Rotating plate; 12. Carrier table; 13. Convex groove; 14. Extension groove; 15. Adjusting round table; 16. Support block; 17. Nut product; 2. Guide optical rod; 21. Convex block; 22. Return spring; 23. Positioning block; 24. Semi-cylinder; 3. Inverted L-shaped support plate; 31. Lifting hydraulic cylinder; 32. Connecting plate; 33. Extrusion plate; 34. Tapping head; 4. Concave lifting seat; 41. Connecting round rod; 42. Fixed ring; 43. Buffer spring; 44. Rectangular block; 5. Concave transmission plate; 51. Circular through hole; 52. Limiting groove; 53. Guide groove; 54. Slide rod; 55. Clamping spring; 6. Internal thread sleeve; 61. Adjusting sleeve; 62. Limiting tooth ring; 7. Threaded rod; 71. Clamping block; 72. Guide plate; 8. Fixed block; 81. Shrinkage groove; 82. Locking bolt; 83. Locking tooth block. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 8, the present invention provides a technical solution: a tapping device for producing rivet nuts, including a workbench 1. The upper end of the workbench 1 protrudes upward to form a circular part. The upper end of the circular part is rotatably installed with a rotating plate 11. The rotating plate 11 is driven by the motor shaft of a stepping motor fixedly installed at the lower end of the workbench 1. The two ends of the rotating plate 11 are symmetrically and fixedly connected with bearing platforms 12. Below the two bearing platforms 12 on the top of the workbench 1, an adjusting turntable 15 and a support block 16 are respectively fixedly installed. A nut product 17 is arranged on the bearing platform 12. Positioning mechanisms for limiting the nut product 17 are symmetrically installed on the bearing platform 12. The upper end of the workbench 1 is fixedly connected with an inverted L-shaped support plate 3 near the support block 16. The upper end of the inverted L-shaped support plate 3 is fixedly installed with a lifting hydraulic cylinder 31. The end of the piston rod of the lifting hydraulic cylinder 31 passes downward through the upper end of the inverted L-shaped support plate 3 and is fixedly connected with a connecting plate 32. The lower end of the connecting plate 32 is rotatably installed with a drill chuck. The drill chuck is driven by the output shaft of a servo motor fixedly installed at the upper end of the connecting plate 32. A tapping head 34 is fixedly installed at the lower end of the drill chuck. The tapping head 34 is directly above the nut product 17. By moving the tapping head 34 downward, tapping processing is performed on the nut product 17. A clamping mechanism for fixing the nut product 17 is installed below the connecting plate 32.

[0032] The motor shaft of the stepping motor rotates a half circle each time, and the motor shaft drives the rotating plate 11 to rotate synchronously, enabling the rotating plate 11 to rotate 180 degrees each time. The rotating plate 11 drives the two bearing platforms 12 at both ends to rotate 180 degrees, thereby swapping the positions of the two bearing platforms 12.

[0033] When the bearing platform 12 rotates to the lower side of the inverted L-shaped support plate 3, the bearing platform 12 is above the support block 16, and the support block 16 supports the bearing platform 12.

[0034] By the telescopic movement of the piston rod of the lifting hydraulic cylinder 31, the connecting plate 32 is driven to move up and down, and the connecting plate 32 drives the clamping mechanism to move up and down.

[0035] Please refer to Figures 2 to 4 , convex grooves 13 are symmetrically opened at the upper end of the bearing platform 12. The positioning mechanism includes a guiding optical rod 2 fixedly connected in the convex groove 13. On one side of the guiding optical rod 2, a convex block 21 and a return spring 22 are sleeved. The convex block 21 is at the inner end of the convex groove 13 close to the inside, and the return spring 22 is on the side where the two convex blocks 21 are away from each other. The upper end of the convex block 21 is fixedly connected with a positioning block 23, and the lower end of the convex block 21 is fixedly connected with a semi-cylinder 24.

[0036] The convex blocks 21 are respectively and slidably connected to the convex grooves 13 and the guiding optical rods 2. The positioning blocks 23 are in sliding contact with the upper ends of the bearing platforms 12. V-shaped clamping grooves are formed at the ends of the two positioning blocks 23 close to each other. The two ends of the return spring 22 are respectively abutted against the convex grooves 13 and the convex blocks 21, and the return spring 22 applies an elastic force to the convex blocks 21.

[0037] When tapping the nut product 17, first place the nut product 17 to be processed on the bearing platform 12, and at the same time, place the nut product 17 between the two positioning blocks 23. When the bearing platform 12 with the nut product 17 to be processed rotates with the rotating plate 11, the bearing platform 12 moves away from above the adjusting round table 15. At this time, the semi-cylindrical body 24 is separated from the adjusting round table 15. Under the action of the elastic forces of the two return springs 22, the two convex blocks 21 are pushed to move closer to each other. The two convex blocks 21 drive the two positioning blocks 23 to move closer to each other, and the nut product 17 to be processed is preliminarily clamped and positioned by the two positioning blocks 23, so that the nut product 17 to be processed can be located at the center of the bearing platform 12.

[0038] After the tapping of the nut product 17 is completed, the bearing platform 12 under the inverted L-shaped support plate 3 rotates to above the adjusting round table 15. During the process of the bearing platform 12 moving closer to the adjusting round table 15, the positioning mechanism is driven to move. When the semi-cylindrical body 24 in the positioning mechanism contacts the cylindrical surface of the adjusting round table 15, the semi-cylindrical body 24 slides along the cylindrical surface of the adjusting round table 15. At the same time, the adjusting round table 15 pushes the semi-cylindrical body 24 to move, so that the two semi-cylindrical bodies 24 move away from each other. The two semi-cylindrical bodies 24 drive the two convex blocks 21 to move away from each other. The two convex blocks 21 drive the two positioning blocks 23 to move away from each other, so that the two positioning blocks 23 release the clamping of the processed nut product 17. At the same time, the convex blocks 21 squeeze the return spring 22. Under the action of the elastic forces of the two return springs 22, the two convex blocks 21 tend to move closer to each other, so as to wait for the next processing.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 7, the clamping mechanism includes a concave lifting seat 4 arranged below the connecting plate 32. A plurality of connecting round rods 41 are symmetrically and fixedly connected to the left and right of the upper end of the concave lifting seat 4. The upper end of each connecting round rod 41 passes through the connecting plate 32 upward and is fixedly connected to a fixed ring 42. A buffer spring 43 is sleeved on each connecting round rod 41. Notches are symmetrically formed on the left and right sides of the concave lifting seat 4. Rectangular blocks 44 are symmetrically and fixedly connected to the front and back of the top of the inner cavity of the concave lifting seat 4. Transmission mechanisms are symmetrically installed on the left and right of the inner cavity of the concave lifting seat 4. Extrusion plates 33 are symmetrically and fixedly connected to the left and right of the lower end of the connecting plate 32. The extrusion plates 33 are in extrusion contact with the transmission mechanisms, and the lower ends of the extrusion plates 33 are in a slope shape. Extension grooves 14 are symmetrically formed on the left and right of the upper end of the bearing platform 12. Connecting grooves are formed on the left and right of the upper end of the workbench 1. The extension grooves 14 and the connecting grooves are both located directly below the extrusion plates 33.

[0040] When the extrusion plate 33 moves downward, the extrusion plate 33 is inserted downward into the inner cavity of the concave lifting seat 4 along the notch, and the two transmission mechanisms are pushed to approach each other through the extrusion plate 33. During the tapping process of the nut product 17 to be processed, the extrusion plate 33 continues to move downward. At this time, the extrusion plate 33 is inserted downward into the extension groove 14 and the connecting groove, so that the extrusion plate 33 can continue to move downward.

[0041] The connecting round rod 41 is slidably connected to the connecting plate 32 up and down. The two ends of the buffer spring 43 are respectively abutted against the connecting plate 32 and the concave lifting seat 4. The buffer spring 43 applies an elastic force to the concave lifting seat 4, so that the concave lifting seat 4 always maintains a downward movement trend.

[0042] Please refer to Figures 5 to 8 , the transmission mechanism includes concave transmission plates 5 symmetrically installed on the inner sides of the concave lifting seat 4. The two concave transmission plates 5 are respectively symmetrically located on the left and right sides of the two rectangular blocks 44. Slide rods 54 are symmetrically inserted through the front and back of the side surface of the concave transmission plate 5. The two ends of the slide rod 54 are respectively fixedly connected to the inner side wall of the concave lifting seat 4 and the side surface of the rectangular block 44. A clamping spring 55 is sleeved on the end of the slide rod 54 close to the rectangular block 44. The mutually remote sides of the two concave transmission plates 5 are in extrusion contact with the extrusion plates 33. A clamping assembly is installed on the mutually close sides of the two concave transmission plates 5. A locking mechanism for locking the clamping assembly is installed on the upper end of each concave transmission plate 5.

[0043] The concave transmission plate 5 is slidably connected to the slide rod 54 left and right. The two ends of the clamping spring 55 are respectively abutted against the inner side wall of the concave lifting seat 4 and the side surface of the rectangular block 44. The clamping spring 55 applies an elastic force to the concave transmission plate 5.

[0044] When the pressing plate 33 moves downward, the slope at the lower end of the pressing plate 33 first contacts the concave transmission plate 5. At this time, the pressing plate 33 continues to move downward to push the concave transmission plate 5 to slide along the slide rod 54, so that the two concave transmission plates 5 move closer to each other. The concave transmission plate 5 presses the clamping spring 55, and at the same time, the two concave transmission plates 5 drive the two clamping components to move closer to each other, and the nut product 17 to be processed is clamped and fixed through the cooperation of the two clamping components.

[0045] A circular through hole 51 is formed in the side surface of the concave transmission plate 5. A limiting groove 52 is formed at the bottom of the groove at the upper end of the concave transmission plate 5 and penetrates downward. The limiting groove 52 penetrates the circular through hole 51. Guide grooves 53 are symmetrically formed in the front and rear of the side surface of the concave transmission plate 5. The clamping component includes an internal thread sleeve 6 inserted through the circular through hole 51. The internal thread sleeve 6 is rotatably connected to the circular through hole 51. Adjusting sleeves 61 and limiting rings are respectively fixedly sleeved at both ends of the internal thread sleeve 6. Among them, the adjusting sleeve 61 is located at one end of the internal thread sleeve 6 close to the side wall of the concave lifting seat 4, and the limiting ring is located at one end of the internal thread sleeve 6 close to the rectangular block 44. The position of the internal thread sleeve 6 is restricted through the cooperation of the adjusting sleeve 61 and the limiting ring, so that the internal thread sleeve 6 can rotate stably along the circular through hole 51;

[0046] A limiting tooth ring 62 is fixedly connected between the adjusting sleeve 61 and the limiting ring on the internal thread sleeve 6. The limiting tooth ring 62 is rotatably connected to the limiting groove 52. The locking mechanism is arranged above the limiting tooth ring 62. A threaded rod 7 is connected to the internal thread of the internal thread sleeve 6. One end of the threaded rod 7 is fixedly connected with a clamping block 71. Guide plates 72 are symmetrically fixedly connected to the front and rear sides of the clamping block 71 close to the concave transmission plate 5. The guide plates 72 are slidably connected to the guide grooves 53 left and right.

[0047] The two clamping blocks 71 are symmetrically distributed left and right between the two concave transmission plates 5. V-shaped clamping grooves are formed on the sides of the two clamping blocks 71 close to each other, and anti-slip grooves are formed inside the V-shaped clamping grooves.

[0048] By rotating the internal thread sleeve 6, the internal thread sleeve 6 rotates along the threaded rod 7, so that the threaded rod 7 can move. By rotating the internal thread sleeve 6 forward or backward, the threaded rod 7 can move left and right. The threaded rod 7 drives the clamping block 71 to move left and right. The clamping block 71 drives the guide plate 72 to slide left and right along the guide groove 53, so that the clamping block 71 can move stably.

[0049] By moving the two clamping blocks 71 closer to each other, the nut product 17 to be processed is clamped and fixed through the cooperation of the V-shaped clamping grooves on the sides of the two clamping blocks 71. Through the cooperation of the two clamping components and the two positioning mechanisms, the nut product 17 to be processed can be accurately located at the center position of the bearing table 12, ensuring the accuracy of subsequent tapping of the nut product 17 to be processed.

[0050] Please refer toFigure 5 , Figure 6 and Figure 8 , the locking mechanism includes a fixed block 8 fixedly connected to the concave transmission plate 5. The fixed block 8 is located above the limiting groove 52. A contraction groove 81 is formed at the lower end of the fixed block 8. A locking bolt 82 is inserted through the upper end of the fixed block 8. The lower end of the locking bolt 82 extends downward into the contraction groove 81. The lower end of the locking bolt 82 is rotatably connected to a locking tooth block 83 through a pin shaft. A plurality of teeth are formed at the lower end of the locking tooth block 83. The lower end of the locking tooth block 83 extends downward into the limiting groove 52. The teeth at the lower end of the locking tooth block 83 are clamped with the limiting tooth ring 62.

[0051] The locking bolt 82 is threadedly connected to the fixed block 8, and the locking tooth block 83 is slidably connected to the contraction groove 81 up and down.

[0052] The lower end of the locking bolt 82 is fixedly connected to the pin shaft, and the pin shaft is rotatably connected to the locking tooth block 83. By rotating the locking bolt 82, the locking bolt 82 moves up or down along the fixed block 8. The locking bolt 82 drives the locking tooth block 83 to slide up and down along the contraction groove 81 through the pin shaft.

[0053] When the locking tooth block 83 moves upward and retracts into the contraction groove 81, the locking tooth block 83 is separated from the limiting tooth ring 62. At this time, the locking tooth block 83 releases the locking of the limiting tooth ring 62, enabling the internal thread sleeve 6 to drive the limiting tooth ring 62 to rotate. When the locking tooth block 83 moves downward and inserts into the limiting groove 52 and is clamped with the limiting tooth ring 62, the limiting tooth ring 62 is locked by the locking tooth block 83. At this time, the internal thread sleeve 6 cannot rotate.

[0054] Working principle: During operation, the nut product 17 to be processed is placed on the bearing platform 12, and at the same time, the nut product 17 is located between the two positioning blocks 23. After the tapping of the previous nut product 17 is completed, the rotating plate 11 is driven to rotate once by the motor shaft of the stepping motor, so that the rotating plate 11 rotates 180 degrees. The rotating plate 11 drives the two bearing platforms 12 at both ends to rotate 180 degrees, thereby swapping the positions of the two bearing platforms 12.

[0055] When the bearing platform 12 loaded with the nut product 17 to be processed rotates with the rotating plate 11, the bearing platform 12 moves away from above the adjusting round table 15. At this time, the semi-cylindrical body 24 is separated from the adjusting round table 15. Under the action of the elastic force of the two return springs 22, the two convex blocks 21 are pushed to move closer to each other, so that the two positioning blocks 23 move closer to each other and cooperate to initially clamp and position the nut product 17 to be processed, enabling the nut product 17 to be processed to be located at the center position of the bearing platform 12. The bearing platform 12 drives the nut product 17 to be processed to rotate to directly below the tapping head 34 for tapping processing.

[0056] Meanwhile, another carrier table 12 drives the nut product 17 that has completed tapping to rotate above the adjusting turntable 15. During the process of the carrier table 12 moving closer to the adjusting turntable 15, it drives the positioning mechanism to move, so that the semi-cylindrical body 24 in the positioning mechanism contacts the cylindrical surface of the adjusting turntable 15. The adjusting turntable 15 pushes the semi-cylindrical body 24 to move, causing the two semi-cylindrical bodies 24 to move away from each other. The two semi-cylindrical bodies 24 drive the two convex blocks 21 to move away from each other. The convex blocks 21 squeeze the return springs 22. Under the action of the elastic force of the two return springs 22, the two convex blocks 21 have a tendency to move closer to each other. At the same time, the two convex blocks 21 drive the two positioning blocks 23 to release the clamping of the nut product 17 that has completed tapping. At this time, the operator can remove the nut product 17 that has completed tapping from the carrier table 12, and then place the nut product 17 to be processed on the carrier table 12. After waiting for the previous nut product 17 to be processed, the motor shaft of the stepping motor drives the rotating plate 11 to rotate once, so that the positions of the two carrier tables 12 are interchanged. In this way, the tapping process of the nut product 17 can be continuously carried out.

[0057] The positioning mechanism can position the nut product 17, so that the nut product 17 can be located at the center of the carrier table 12, ensuring the accuracy of subsequent processing. At the same time, during the process of loading and unloading the nut product 17, the operator only needs to perform loading and unloading on one carrier table 12 away from the tapping head 34, without reaching the hand, arm, etc. under the tapping head 34, avoiding potential safety hazards.

[0058] When tapping the nut product 17, first, the piston rod of the lifting hydraulic cylinder 31 extends downward to drive the connecting plate 32 to move downward. After the connecting plate 32 moves downward for a certain distance, the lower end of the concave lifting seat 4 at the lower end of the connecting plate 32 first abuts against the upper end of the carrier table 12. The concave lifting seat 4 drives the two transmission mechanisms and the two clamping components to be on the left and right sides of the nut product 17. At this time, the connecting plate 32 continues to move downward, and the connecting plate 32 slides downward along the connecting round rod 41. The connecting plate 32 drives the pressing plate 33 and the tapping head 34 to move downward synchronously;

[0059] The slope at the lower end of the pressing plate 33 first contacts the concave transmission plate 5. At this time, the connecting plate 32 drives the pressing plate 33 to continue to move downward. By pushing the concave transmission plate 5 along the slide rod 54 through the pressing plate 33, the two concave transmission plates 5 move closer to each other. The two concave transmission plates 5 drive the two clamping components to move closer to each other. The two clamping blocks 71 in the two clamping components cooperate to clamp and fix the nut product 17 to be processed. Through the cooperation of the two clamping components and the two positioning mechanisms, the nut product 17 to be processed can be accurately located at the center of the carrier table 12, ensuring the accuracy of subsequent tapping of the nut product 17 to be processed.

[0060] At this time, the tapping head 34 continues to move downward, and the tapping head 34 performs tapping on the nut product 17. After the processing is completed, the piston rod of the lifting hydraulic cylinder 31 drives the connecting plate 32 to move upward. At this time, the buffer spring 43 is in a compressed state. Under the action of the elastic force of the buffer spring 43 and the gravity of the clamping mechanism, the concave lifting seat 4 still remains above the bearing table 12.

[0061] The connecting plate 32 drives the pressing plate 33 to separate from the concave transmission plate 5 first. Under the action of the elastic force of the clamping spring 55, the two concave transmission plates 5 move away from each other, and the two concave transmission plates 5 drive the two clamping components to loosen the clamping and fixing of the nut product 17.

[0062] After the connecting plate 32 moves upward for a certain distance, it contacts the fixing ring 42 at the upper end of the connecting round rod 41. At this time, when the connecting plate 32 moves upward further, it will drive the fixing ring 42 and the connecting round rod 41 to move upward. The connecting round rod 41 drives the concave lifting seat 4 to move upward, so that the clamping mechanism, the transmission mechanism, and the clamping components move upward to reset and wait for the next processing.

[0063] By screwing out the locking bolt 82 along the fixing block 8, the locking bolt 82 drives the locking tooth block 83 to separate from the limit tooth ring 62. At this time, the locking tooth block 83 releases the locking of the limit tooth ring 62. By rotating the adjusting sleeve 61, the internal thread sleeve 6 is driven to rotate. When the internal thread sleeve 6 rotates, the threaded rod 7 moves left and right. The threaded rod 7 drives the clamping block 71 to move left and right, thereby adjusting the distance between the two clamping blocks 71, so that the clamping block 71 can clamp and fix nut products 17 with different diameters, and improve the use range of the tapping equipment.

[0064] By screwing the locking bolt 82 downward along the fixing block 8, the locking tooth block 83 is clamped with the limit tooth ring 62. The limit tooth ring 62 is locked by the locking tooth block 83. At this time, the internal thread sleeve 6 cannot rotate, so that the threaded rod 7 cannot move left and right along the internal thread sleeve 6. At this time, the clamping component and the concave transmission plate 5 move synchronously or remain stationary.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tapping device for producing self-clinching nuts, comprising a workbench (1), characterized in that: The upper end of the workbench (1) is provided with a circular portion protruding upward, and a rotating plate (11) is rotatably mounted on the upper end of the circular portion. The rotating plate (11) is driven by a motor shaft of a stepper motor fixedly mounted on the lower end of the workbench (1). The two ends of the rotating plate (11) are symmetrically fixedly connected to the bearing platforms (12). An adjusting circular table (15) and a supporting block (16) are respectively fixedly mounted on the top of the workbench (1) below the two bearing platforms (12). A nut product (17) is arranged on the bearing platform (12). A positioning mechanism for limiting the position of the nut product (17) is symmetrically mounted on the bearing platform (12). The workbench (1) The upper end of the inverted L-shaped support plate (3) is fixedly connected near the support block (16), and a lifting hydraulic cylinder (31) is fixedly installed on the upper end of the inverted L-shaped support plate (3). The end of the piston rod of the lifting hydraulic cylinder (31) passes downward through the upper end of the inverted L-shaped support plate (3) and is fixedly connected to the connecting plate (32). A drill clamp is rotatably installed on the lower end of the connecting plate (32). The drill clamp is driven by the output shaft of a servo motor fixedly installed on the upper end of the connecting plate (32). A tapping head (34) is fixedly installed on the lower end of the drill clamp. A clamping mechanism for fixing the nut product (17) is installed below the connecting plate (32); The clamping mechanism comprises a concave lifting seat (4) arranged below the connecting plate (32); the upper end of the concave lifting seat (4) is symmetrically fixedly connected to a plurality of connecting round rods (41); the upper end of each connecting round rod (41) passes through the connecting plate (32) upward and is fixedly connected to the fixing ring (42); a buffer spring (43) is sleeved on each connecting round rod (41); notches are symmetrically opened on the left and right sides of the concave lifting seat (4); and the top of the inner cavity of the concave lifting seat (4) is symmetrically fixed frontward and rearward. A rectangular block (44) is connected, a transmission mechanism is symmetrically installed in the inner cavity of the concave lifting seat (4), an extrusion plate (33) is symmetrically fixedly connected to the lower end of the connecting plate (32), the extrusion plate (33) is in extrusion contact with the transmission mechanism, and the lower end of the extrusion plate (33) is sloped, the upper end of the bearing platform (12) is symmetrically provided with extension grooves (14), and the upper end of the workbench (1) is provided with connecting grooves, and the extension grooves (14) and the connecting grooves are both located directly below the extrusion plate (33); The transmission mechanism comprises a concave transmission plate (5) symmetrically mounted on the inner side of the concave lifting seat (4), a sliding rod (54) symmetrically penetrates and is inserted into the side of the concave transmission plate (5) front and back, and the two ends of the sliding rod (54) are respectively fixedly connected to the inner side wall of the concave lifting seat (4) and the side of the rectangular block (44), and a clamping spring (55) is sleeved on one end of the sliding rod (54) close to the rectangular block (44), and the sides of the two concave transmission plates (5) away from each other are in compression contact with the extrusion plate (33), and the sides of the two concave transmission plates (5) close to each other are installed with a clamping assembly, and the upper end of each concave transmission plate (5) is installed with a locking mechanism for locking the clamping assembly; A circular through hole (51) is provided on the side of the concave transmission plate (5), a limiting groove (52) is provided downwardly through the bottom of the groove at the upper end of the concave transmission plate (5), the limiting groove (52) passes through the circular through hole (51), and a guide groove (53) is provided symmetrically through the side of the concave transmission plate (5) in the front and rear directions. The clamping assembly comprises an internal thread sleeve (6) inserted into the circular through hole (51), the internal thread sleeve (6) is rotatably connected to the circular through hole (51), and an adjustment sleeve (61) and a limiting ring are fixedly sleeved at both ends of the internal thread sleeve (6). A limiting toothed ring (62) is fixedly connected between the adjusting sleeve (61) and the limiting ring on the internal threaded sleeve (6), the limiting toothed ring (62) is rotatably connected to the limiting groove (52), the locking mechanism is arranged above the limiting toothed ring (62), the internal thread of the internal threaded sleeve (6) is internally threadedly connected to a threaded rod (7), one end of the threaded rod (7) is fixedly connected to a clamping block (71), a side of the clamping block (71) close to the concave transmission plate (5) is symmetrically fixedly connected to a guide plate (72), and the guide plate (72) is slidably connected to the guide groove (53) left and right; The locking mechanism comprises a fixing block (8) fixedly connected to the concave transmission plate (5), the fixing block (8) being located above the limiting groove (52), a contraction groove (81) being provided at the lower end of the fixing block (8), a locking bolt (82) being inserted through the upper end of the fixing block (8), the lower end of the locking bolt (82) extending downward into the contraction groove (81), and a locking tooth block (83) being rotatably connected to the lower end of the locking bolt (82) via a pin shaft, a plurality of teeth being provided at the lower end of the locking tooth block (83), the lower end of the locking tooth block (83) extending downward into the limiting groove (52), and the teeth at the lower end of the locking tooth block (83) being engaged with the limiting tooth ring (62).

2. A tapping device for producing self-clinching nuts according to claim 1, characterized in that: The upper end of the support platform (12) is symmetrically provided with a convex groove (13), and the positioning mechanism comprises a guide light rod (2) fixedly connected in the convex groove (13), a convex block (21) and a return spring (22) are sleeved on one side of the guide light rod (2), the convex block (21) is located at one end of the convex groove (13) close to the inner side, the upper end of the convex block (21) is fixedly connected to the positioning block (23), and the lower end of the convex block (21) is fixedly connected to the semi-cylinder (24).

3. The tapping device for producing self-clinching nuts according to claim 2, characterized in that: The convex block (21) is slidably connected to the convex groove (13) and the guide light rod (2), respectively; the positioning block (23) is in slidable contact with the upper end of the support platform (12); a V-shaped clamping groove is provided at one end of the two positioning blocks (23) close to each other; and two ends of the return spring (22) are respectively in contact with the convex groove (13) and the convex block (21).

4. The tapping device for producing self-clinching nuts according to claim 1, characterized in that: The connecting round rod (41) is slidably connected to the connecting plate (32) up and down, and the two ends of the buffer spring (43) are respectively in contact with the connecting plate (32) and the concave lifting seat (4).

5. The tapping device for producing self-clinching nuts according to claim 1, characterized in that: The concave transmission plate (5) is slidably connected to the slide rod (54) left and right, and the two ends of the clamping spring (55) are respectively in contact with the inner side wall of the concave lifting seat (4) and the side surface of the rectangular block (44).

6. The tapping device for producing self-clinching nuts according to claim 1, characterized in that: The locking bolt (82) is threadedly connected to the fixing block (8), and the locking tooth block (83) is slidably connected to the contraction groove (81) up and down.

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