Tapping equipment for pressing rivet nut production

Abstract

The invention relates to the technical field of nut machining, in particular to tapping equipment for pressing rivet nut production, which comprises a workbench, the upper end of the workbench is provided with a circular part in an upward protruding manner, the upper end of the circular part is rotatably provided with a rotating plate, and the rotating plate is driven by a motor shaft of a stepping motor fixedly mounted at the lower end of the workbench; the nut machining device has the beneficial effects that when the nut machining device works, a nut product to be machined is placed on the bearing tables, meanwhile, the nut product is located between the two positioning blocks, the nut product is placed on the bearing tables, and therefore the nut product can be machined conveniently; the two positioning blocks in the two positioning mechanisms are close to each other and matched with each other to preliminarily clamp and position a nut product to be machined, so that the nut product to be machined can be located in the center of the bearing table, and the nut product to be machined is driven by the bearing table to rotate to the position under the tapping head to be tapped.

Description

Technical Field

[0001] The invention relates to the technical field of nut processing, in particular to a tapping device for producing riveted nuts. Background Art

[0002] Compression rivet nuts, also known as rivet nuts and self-tightening nuts, are a type of nut used on thin plates or sheet metals. They are round in shape and have embossed teeth and guide grooves on one end. The principle is that the embossed teeth are pressed into the preset holes of the sheet metal. Generally speaking, the aperture of the preset hole is slightly smaller than the embossed teeth of the rivet nut. The pressure causes the teeth of the rivet nut to squeeze into the plate, causing plastic deformation around the preset hole, and the deformed object is squeezed into the guide groove, thereby producing a locking effect.

[0003] The nuts need to be tapped during the processing. When tapping, a clamp is needed to fix the nuts. However, the existing tapping equipment needs to replace different clamps when processing nuts of different diameters, and the clamp cannot adapt to nuts of different sizes. When the existing clamp is used to position the self-riveted nuts, the tapping head needs to be manually placed on the processing table and then clamped and positioned by the clamp. Manual placement can easily cause deviation in the position of the nut, and the tapping head cannot be aligned with the center position of the nut. Multiple adjustments are often required, which greatly affects work efficiency. Moreover, in the process of manual placement, if the tapping equipment is accidentally started, it will cause certain harm to the staff and there is a great safety hazard. Summary of the invention

[0004] The object of the present invention is to provide a tapping device for producing self-clinching nuts to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tapping device for producing riveted nuts, comprising a workbench, a circular portion protruding upward at the upper end of the workbench, a rotating plate rotatably installed at the upper end of the circular portion, the rotating plate is driven by a motor shaft of a stepper motor fixedly installed at the lower end of the workbench, two ends of the rotating plate are symmetrically fixedly connected with bearing platforms, an adjusting round table and a supporting block are respectively fixedly installed on the top of the workbench below the two bearing platforms, a nut product is arranged on the bearing platform, a positioning mechanism for limiting the nut product is symmetrically installed on the bearing platform, an inverted L-shaped supporting plate is fixedly connected to the upper end of the workbench near the supporting block, a lifting hydraulic cylinder is fixedly installed on the upper end of the inverted L-shaped supporting plate, the end of the piston rod of the lifting hydraulic cylinder passes downward through the upper end of the inverted L-shaped supporting plate and is fixedly connected to the connecting plate, a drill clamp is rotatably installed on the lower end of the connecting plate, the drill clamp is driven by the output shaft of a servo motor fixedly installed on the upper end of the connecting plate, a tapping head is fixedly installed on the lower end of the drill clamp, and a clamping mechanism for fixing the nut product is installed below the connecting plate.

[0006] As a further solution of the present invention, a convex groove is symmetrically opened on the upper end of the supporting platform, and the positioning mechanism includes a guide light rod fixedly connected in the convex groove, a convex block and a reset spring are sleeved on one side of the guide light rod, the convex block is located at the end of the convex groove close to the inner side, the upper end of the convex block is fixedly connected to the positioning block, and the lower end of the convex block is fixedly connected to a semi-cylinder.

[0007] As a further solution of the present invention, the convex block is slidably connected to the convex groove and the guide light rod respectively, the positioning block is in sliding contact with the upper end of the support platform, a V-shaped clamping groove is provided at one end of the two positioning blocks close to each other, and the two ends of the return spring are respectively abutted against the convex groove and the convex block.

[0008] As a further scheme of the present invention, the clamping mechanism includes a concave lifting seat arranged below the connecting plate, the upper end of the concave lifting seat is symmetrically fixedly connected with a plurality of connecting round rods, the upper end of each connecting round rod passes through the connecting plate upward and is fixedly connected to the fixing ring, a buffer spring is sleeved on each connecting round rod, notches are symmetrically opened on the left and right sides of the concave lifting seat, a rectangular block is symmetrically fixedly connected to the top of the inner cavity of the concave lifting seat front and back, a transmission mechanism is symmetrically installed in the inner cavity of the concave lifting seat, an extrusion plate is symmetrically fixedly connected to the lower end of the connecting plate, the extrusion plate is in extrusion contact with the transmission mechanism, and the lower end of the extrusion plate is sloped, the upper end of the bearing platform is symmetrically opened with extension grooves, the upper end of the workbench is opened with connecting grooves on the left and right, and the extension groove and the connecting groove are both located directly below the extrusion plate.

[0009] As a further solution of the present invention, the connecting round rod is slidably connected to the connecting plate up and down, and the two ends of the buffer spring are respectively in contact with the connecting plate and the concave lifting seat.

[0010] As a further solution of the present invention, the transmission mechanism includes a concave transmission plate installed symmetrically on the inner side of the concave lifting seat, and a sliding rod is inserted and penetrated symmetrically through the side of the concave transmission plate in a front-to-back manner. The two ends of the sliding rod are respectively fixedly connected to the inner side wall of the concave lifting seat and the side of the rectangular block, and a clamping spring is sleeved on the end of the sliding rod close to the rectangular block. The sides of the two concave transmission plates away from each other are in compression contact with the extrusion plate, and the sides of the two concave transmission plates close to each other are installed with a clamping assembly, and the upper end of each concave transmission plate is installed with a locking mechanism for locking the clamping assembly.

[0011] As a further solution of the present invention, the concave transmission plate is slidably connected to the slide rod left and right, and the two ends of the clamping spring are respectively in contact with 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 of the concave transmission plate, a limiting groove is provided downwardly through the bottom of the groove on the upper end of the concave transmission plate, the limiting groove passes through the circular through hole, and a guide groove is provided symmetrically through the side of the concave transmission plate in the front and rear directions, the clamping assembly includes an internal thread sleeve inserted into the circular through hole, the internal thread sleeve is rotatably connected to the circular through hole, and the two ends of the internal thread sleeve are respectively fixedly sleeved with an adjustment sleeve and a limiting ring; A limiting toothed ring is fixedly connected between the adjusting sleeve and the limiting ring on the internal threaded sleeve, and the limiting toothed ring is rotatably connected to the limiting groove. The locking mechanism is arranged above the limiting toothed ring. A threaded rod is connected to the internal thread of the internal threaded sleeve, and a clamping block is fixedly connected to one end of the threaded rod. A guide plate is symmetrically fixedly connected to the side of the clamping block close to the concave transmission plate, and the guide plate is slidably connected to the guide groove left and right.

[0013] 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 located 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.

[0014] As a further solution of the present invention, the locking bolt is threadedly connected to the fixing block, and the locking tooth block is slidably connected to the contraction groove up and down.

[0015] The beneficial effects of the present invention are: 1. During operation, the nut product to be processed is placed on the bearing table, and the nut product is placed between the two positioning blocks. The two positioning blocks in the two positioning mechanisms are brought close to each other to perform preliminary clamping and positioning on the nut product to be processed, so that the nut product to be processed can be in the center position of the bearing table, and the bearing table drives the nut product to be processed to rotate to the bottom of the tapping head for tapping. After the processing is completed, the bearing table is rotated to the adjusting round table, so that the two positioning blocks in the positioning mechanism are separated from each other, and the two positioning blocks release the clamping of the nut product that has been tapped. At this time, the staff removes the tapped nut product from the bearing table, and then places the nut product to be processed on the bearing table, and waits for the previous nut product to be processed. After the processing is completed, this reciprocating process can be repeated, so that the nut product can be continuously tapped. The operation is simple and convenient, and another nut product can be tapped during loading and unloading, which greatly improves the work efficiency.

[0016] 2. The positioning mechanism can be used to position the nut product so that it can be located at the center of the carrier, ensuring the accuracy of subsequent processing. At the same time, during the loading and unloading process of the nut product, the staff only needs to load and unload the nut product on a carrier away from the tapping head, without having to put their hands or arms under the tapping head, thus avoiding safety hazards.

[0017] 3. When tapping the nut product, first extend the piston rod of the lifting hydraulic cylinder downward to drive the connecting plate to move downward, and the connecting plate drives the concave lifting seat, the extrusion plate, and the tapping head to move downward synchronously, and the extrusion plate drives the two transmission mechanisms to approach each other, and the transmission mechanism drives the two clamping assemblies to approach each other, and the two clamping blocks in the two clamping assemblies cooperate to clamp and fix the nut product to be processed, and the two clamping assemblies and the two positioning mechanisms cooperate to make the nut product to be processed accurately in the center position of the bearing platform, so as to ensure the accuracy of subsequent tapping of the nut product to be processed, and the nut product is tapped by moving the tapping head downward. After the processing is completed, 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 assembly move upward to reset, waiting for the next processing.

[0018] 4. The locking of the limiting tooth ring is released by the locking tooth block in the locking mechanism, and the internal thread sleeve is driven to rotate by rotating the adjusting sleeve, so as to adjust the distance between the two clamping blocks, so that the clamping blocks can clamp and fix nut products of different diameters, thereby improving the use range of the tapping equipment; by clamping the locking tooth block in the locking mechanism with the limiting tooth ring, the threaded column cannot move left and right along the internal thread sleeve, and the clamping assembly and the concave transmission plate keep synchronous movement or stationary at this time, so that the clamping assembly can move synchronously with the transmission mechanism, and then the nut product can be stably clamped and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a tapping device for producing self-clinching nuts according to the present invention; Figure 2 It is a side sectional view of the structure of the tapping equipment for producing the self-clinching nut of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a side cross-sectional view of the bearing platform, connecting plate, concave lifting seat and clamping mechanism structure of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 7 It is an exploded view of the structure of the bearing platform, positioning mechanism, connecting plate and clamping mechanism of the present invention; Figure 8 It is an exploded view of the transmission mechanism, clamping assembly and locking mechanism structure of the present invention.

[0020] In the figure: 1. workbench; 11. rotating plate; 12. bearing platform; 13. convex groove; 14. extension groove; 15. adjusting round table; 16. support block; 17. nut product; 2. guide light 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. Fixing ring; 43. Buffer spring; 44. Rectangular block; 5. Concave transmission plate; 51. Circular through hole; 52. Limiting groove; 53. Guide groove; 54. Sliding rod; 55. Clamping spring; 6. Internal threaded sleeve; 61. Adjusting sleeve; 62. Limiting tooth ring; 7. Threaded rod; 71. Clamping block; 72. Guide plate; 8. Fixing block; 81. Contraction groove; 82. Locking bolt; 83. Locking tooth block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 8The present invention provides a technical solution: a tapping device for producing rivet nuts, comprising a workbench 1, the upper end of the workbench 1 is provided with a circular portion protruding upward, the upper end of the circular portion is rotatably installed with a rotating plate 11, the rotating plate 11 is driven by a 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 fixedly connected with a bearing platform 12, the top of the workbench 1 is respectively fixedly installed with an adjusting round table 15 and a supporting block 16 below the two bearing platforms 12, a nut product 17 is provided on the bearing platform 12, a positioning mechanism for limiting the nut product 17 is symmetrically installed on the bearing platform 12, and the upper end of the workbench 1 is fixedly connected with the supporting block 1 An inverted L-shaped support plate 3 is fixedly connected near 6, 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. The tapping head 34 is located directly above the nut product 17. The nut product 17 is tapped by moving the tapping head 34 downward. A clamping mechanism for fixing the nut product 17 is installed below the connecting plate 32.

[0023] Each time the motor shaft of the stepper motor rotates half a circle, the motor shaft drives the rotating plate 11 to rotate synchronously, so that the rotating plate 11 can rotate 180 degrees each time, and the rotating plate 11 drives the two supporting platforms 12 at both ends to rotate 180 degrees, so that the positions of the two supporting platforms 12 are interchanged.

[0024] When the carrying platform 12 rotates to the bottom of the inverted L-shaped supporting plate 3 , the carrying platform 12 is located above the supporting block 16 , and the carrying platform 12 is supported by the supporting block 16 .

[0025] The connecting plate 32 is driven to move up and down by the extension and retraction of the piston rod of the lifting hydraulic cylinder 31 , and the connecting plate 32 drives the clamping mechanism to move up and down.

[0026] See also Figures 2 to 4 A convex groove 13 is symmetrically provided at the upper end of the carrier 12, and the positioning mechanism includes 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 the end of the convex groove 13 close to the inner side, and the return spring 22 is located 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 to the positioning block 23, and the lower end of the convex block 21 is fixedly connected to the semi-cylinder 24.

[0027] 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 sliding contact with the upper end of the supporting platform 12, and a V-shaped clamping groove is provided at one end of the two positioning blocks 23 close to each other. The two ends of the return spring 22 are respectively in contact with the convex groove 13 and the convex block 21, and the return spring 22 applies an elastic force to the convex block 21.

[0028] When the nut product 17 is tapped, the nut product 17 to be processed is first placed on the supporting platform 12, and the nut product 17 is located between the two positioning blocks 23. When the supporting platform 12 with the nut product 17 to be processed rotates along with the rotating plate 11, the supporting platform 12 moves away from above the adjusting table 15. At this time, the semi-cylinder 24 is separated from the adjusting table 15, and the two convex blocks 21 are pushed to move closer to each other under the action of the elastic force of the two reset springs 22. 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 position of the supporting platform 12.

[0029] When the tapping process of the nut product 17 is completed, the supporting platform 12 under the inverted L-shaped supporting plate 3 rotates to the top of the adjusting table 15. The supporting platform 12 drives the positioning mechanism to move in the process of moving close to the adjusting table 15. When the semi-cylinder 24 in the positioning mechanism contacts the cylindrical surface of the adjusting table 15, the semi-cylinder 24 slides along the cylindrical surface of the adjusting table 15. At the same time, the adjusting table 15 pushes the semi-cylinder 24 to move, so that the two semi-cylinders 24 move away from each other, and the two semi-cylinders 24 drive the two convex blocks 21 away from each other. The two convex blocks 21 drive the two positioning blocks 23 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 block 21 squeezes the reset spring 22. Under the action of the elastic force of the two reset springs 22, the two convex blocks 21 have a tendency to approach each other, thereby waiting for the next processing.

[0030] See also Figure 1 , Figure 2 , Figure 5 and Figure 7The clamping mechanism includes a concave lifting seat 4 arranged below the connecting plate 32, and a plurality of connecting round rods 41 are symmetrically fixedly connected to the upper end of the concave lifting seat 4, and 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, and 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 a rectangular block 44 is symmetrically fixedly connected to the top of the inner cavity of the concave lifting seat 4 front and back. A transmission mechanism is symmetrically installed in the inner cavity of the concave lifting seat 4, and an extrusion plate 33 is symmetrically fixedly connected to the lower end of the connecting plate 32, and the extrusion plate 33 is in extrusion contact with the transmission mechanism, and the lower end of the extrusion plate 33 is sloped, and an extension groove 14 is symmetrically opened on the upper end of the bearing platform 12, and a connecting groove is opened on the upper end of the workbench 1, and the extension groove 14 and the connecting groove are directly below the extrusion plate 33.

[0031] When the extrusion plate 33 moves downward, the extrusion plate 33 is inserted into the inner cavity of the concave lifting seat 4 along the notch, and the two transmission mechanisms are pushed closer to each other by the extrusion plate 33. When the nut product 17 to be processed is being tapped, 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.

[0032] The connecting 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. The buffer spring 43 applies elastic force to the concave lifting seat 4, so that the concave lifting seat 4 always maintains a downward movement trend.

[0033] See also Figures 5 to 8 The transmission mechanism includes a concave transmission plate 5 symmetrically installed on the inner side of the concave lifting seat 4. The two concave transmission plates 5 are symmetrically located on the left and right sides of the two rectangular blocks 44, respectively. The side of the concave transmission plate 5 is symmetrically inserted with a slide bar 54. The two ends of the slide bar 54 are respectively fixedly connected to the inner side wall of the concave lifting seat 4 and the side of the rectangular block 44. A clamping spring 55 is sleeved on one end of the slide bar 54 close to the rectangular block 44. The sides of the two concave transmission plates 5 away from each other are in compression contact with the extrusion plate 33. The sides of the two concave transmission plates 5 close to each other are installed with a clamping assembly. The upper end of each concave transmission plate 5 is installed with a locking mechanism for locking the clamping assembly.

[0034] The concave transmission plate 5 is slidably connected to the slide bar 54 , and the two ends of the clamping spring 55 are respectively in contact with the inner wall of the concave lifting seat 4 and the side of the rectangular block 44 , and the clamping spring 55 applies elastic force to the concave transmission plate 5 .

[0035] When the extrusion plate 33 moves downward, the slope at the lower end of the extrusion plate 33 first contacts the concave transmission plate 5. At this time, the extrusion 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, and the concave transmission plates 5 squeeze the clamping spring 55. At the same time, the two concave transmission plates 5 drive the two clamping components to approach each other, and the nut product 17 to be processed is clamped and fixed through the cooperation of the two clamping components.

[0036] A circular through hole 51 is provided on the side of the concave transmission plate 5, and a limiting groove 52 is provided downwardly through the bottom of the groove at the upper end of the concave transmission plate 5, and the limiting groove 52 penetrates the circular through hole 51. A guide groove 53 is symmetrically provided on the side of the concave transmission plate 5, and the clamping assembly includes an internal threaded sleeve 6 inserted into the circular through hole 51, and the internal threaded sleeve 6 is rotatably connected to the circular through hole 51. The two ends of the internal threaded sleeve 6 are respectively fixedly sleeved with an adjusting sleeve 61 and a limiting ring, wherein the adjusting sleeve 61 is located at one end of the internal threaded 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 threaded sleeve 6 close to the rectangular block 44. The position of the internal threaded sleeve 6 is limited by the cooperation of the adjusting sleeve 61 and the limiting ring, so that the internal threaded sleeve 6 can stably rotate along the circular through hole 51; 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. A threaded rod 7 is connected to the internal thread of the internal threaded sleeve 6. A clamping block 71 is fixedly connected to one end of the threaded rod 7. A guide plate 72 is symmetrically fixedly connected to the clamping block 71 on one side of the concave transmission plate 5. The guide plate 72 is slidably connected to the guide groove 53 left and right.

[0037] The two clamping blocks 71 are symmetrically distributed between the two concave transmission plates 5 . A V-shaped clamping groove is formed on one side of the two clamping blocks 71 close to each other, and an anti-slip groove is formed inside the V-shaped clamping groove.

[0038] By rotating the internal threaded sleeve 6, the internal threaded sleeve 6 rotates along the threaded rod 7, so that the threaded rod 7 can move, and by the internal threaded sleeve 6 rotating forward or reverse, the threaded rod 7 can move left and right, and the threaded rod 7 drives the clamping block 71 to move left and right, and 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.

[0039] By bringing the two clamping blocks 71 closer to each other and cooperating with the V-shaped clamping grooves on the sides of the two clamping blocks 71 to clamp and fix the nut product 17 to be processed, and by cooperating with 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 supporting platform 12, thereby ensuring the accuracy of subsequent tapping of the nut product 17 to be processed.

[0040] See also Figure 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 provided 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, and 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 provided 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, and the teeth at the lower end of the locking tooth block 83 are engaged with the limiting tooth ring 62.

[0041] 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.

[0042] 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 upward or downward along the fixed block 8, and the locking bolt 82 drives the locking tooth block 83 to slide up and down along the contraction groove 81 through the pin shaft; When the locking tooth block 83 moves upward and is collected 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 lock on the limiting tooth ring 62, so that the internal threaded sleeve 6 can drive the limiting tooth ring 62 to rotate; when the locking tooth block 83 moves downward and is inserted into the limiting groove 52 and is engaged with the limiting tooth ring 62, the limiting tooth ring 62 is locked by the locking tooth block 83, and the internal threaded sleeve 6 cannot rotate.

[0043] Working principle: During operation, the nut product 17 to be processed is placed on the bearing platform 12, and the nut product 17 is placed between the two positioning blocks 23. When the tapping of the previous nut product 17 is completed, the motor shaft of the stepper motor drives the rotating plate 11 to rotate once, so that the rotating plate 11 rotates 180 degrees, and the rotating plate 11 drives the two bearing platforms 12 at both ends to rotate 180 degrees, so that the positions of the two bearing platforms 12 are interchanged; At this time, when the supporting platform 12 equipped with the nut product 17 to be processed rotates with the rotating plate 11, the supporting platform 12 moves away from the top of the adjusting table 15. At this time, the semi-cylinder 24 is separated from the adjusting table 15, and the two convex blocks 21 are pushed to move closer to each other under the action of the elastic force of the two reset springs 22, so that the two positioning blocks 23 are close to each other to cooperate in preliminary clamping and positioning of the nut product 17 to be processed, so that the nut product 17 to be processed can be in the center position of the supporting platform 12, and the nut product 17 to be processed is driven by the supporting platform 12 to rotate to the bottom of the tapping head 34 for tapping processing.

[0044] At the same time, another bearing platform 12 drives the tapped nut product 17 to rotate to the top of the adjusting round table 15. In the process of the bearing platform 12 moving close to the adjusting round table 15, it drives the positioning mechanism to move, so that the semi-cylinder 24 in the positioning mechanism contacts the cylindrical surface of the adjusting round table 15. The semi-cylinder 24 is pushed to move by the adjusting round table 15, so that the two semi-cylinders 24 move away from each other. The two semi-cylinders 24 drive the two convex blocks 21 to move away from each other. The convex blocks 21 squeeze the reset springs 22, and the two reset springs 22 are elastically pressed to move the two semi-cylinders 24. The convex blocks 21 have a tendency to approach each other, and at the same time, the two convex blocks 21 drive the two positioning blocks 23 to loosen the clamping of the tapped nut product 17. At this time, the staff will remove the tapped nut product 17 from the supporting platform 12, and then place the nut product 17 to be processed on the supporting platform 12. After waiting for the previous nut product 17 to be processed, the motor shaft of the stepper motor drives the rotating plate 11 to rotate once, so that the positions of the two supporting platforms 12 are exchanged, and this reciprocating process can be carried out to continuously perform tapping on the nut product 17.

[0045] The positioning mechanism provided can be used to position the nut product 17 so that the nut product 17 can be located at the center of the support platform 12, thereby ensuring the accuracy of subsequent processing. At the same time, during the loading and unloading process of the nut product 17, the staff only needs to load and unload the nut product 17 on a support platform 12 far away from the tapping head 34, without having to extend their palms, arms, etc. under the tapping head 34, thereby avoiding safety hazards.

[0046] When tapping the nut product 17, the piston rod of the lifting hydraulic cylinder 31 is first extended downward to drive the connecting plate 32 to move downward. After the connecting plate 32 moves downward for a 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 bearing platform 12, and the concave lifting seat 4 drives two transmission mechanisms and two clamping components to be located 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, and the connecting plate 32 drives the extrusion plate 33 and the tapping head 34 to move downward synchronously; The slope at the lower end of the extrusion plate 33 first contacts the concave transmission plate 5, and at this time the connecting plate 32 drives the extrusion plate 33 to continue to move downward, and the extrusion plate 33 pushes 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, and the two concave transmission plates 5 drive the two clamping assemblies to move closer to each other, and the two clamping blocks 71 in the two clamping assemblies cooperate to clamp and fix the nut product 17 to be processed, and the two clamping assemblies and the two positioning mechanisms cooperate to make the nut product 17 to be processed accurately located at the center position of the supporting platform 12, thereby ensuring the accuracy of subsequent tapping of the nut product 17 to be processed.

[0047] At this time, the tapping head 34 continues to move downward, and the nut product 17 is tapped by the tapping head 34. After the processing is completed, the connecting plate 32 is driven upward by the piston rod of the lifting hydraulic cylinder 31. 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 is still above the bearing platform 12; The extrusion plate 33 is driven by the connecting plate 32 to separate from the concave transmission plate 5 first, and the two concave transmission plates 5 are moved away from each other under the action of the elastic force of the clamping spring 55. The two concave transmission plates 5 drive the two clamping components to loosen the clamping fixation of the nut product 17.

[0048] After the connecting plate 32 moves upward for a distance, it contacts the fixing ring 42 at the upper end of the connecting round rod 41. At this time, the connecting plate 32 moves upward again to drive the fixing ring 42 and the connecting round rod 41 to move upward, and 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 assembly move upward to reset and wait for the next processing.

[0049] By screwing the locking bolt 82 upward along the fixing block 8, the locking bolt 82 drives the locking tooth block 83 to separate from the limiting tooth ring 62. At this time, the locking tooth block 83 releases the lock on the limiting tooth ring 62, and the internal threaded sleeve 6 is driven to rotate by rotating the adjusting sleeve 61. When the internal threaded sleeve 6 rotates, it drives the threaded rod 7 to move 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 of different diameters, thereby improving the use range of the tapping equipment.

[0050] By screwing the locking bolt 82 downward along the fixing block 8, the locking tooth block 83 is engaged with the limiting tooth ring 62, and the limiting tooth ring 62 is locked by the locking tooth block 83. At this time, the internal threaded sleeve 6 cannot rotate, so that the threaded rod 7 cannot move left and right along the internal threaded sleeve 6. At this time, the clamping assembly and the concave transmission plate 5 maintain synchronous movement or stillness.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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).

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 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, and a transmission mechanism is symmetrically installed in the inner cavity of the concave lifting seat (4). The lower end of the connecting plate (32) is symmetrically fixedly connected to an extrusion plate (33), and 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 on the left and right sides, and the extension grooves (14) and the connecting grooves are both located directly below the extrusion plate (33).

5. The tapping device for producing self-clinching nuts according to claim 4, 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).

6. The tapping device for producing self-clinching nuts according to claim 4, characterized in that: 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 two concave transmission plates (5) are in extrusion contact with the extrusion plate (33) on the sides away from each other, and the two concave transmission plates (5) are installed with a clamping assembly on the sides close to each other, and a locking mechanism for locking the clamping assembly is installed on the upper end of each concave transmission plate (5).

7. The tapping device for producing self-clinching nuts according to claim 6, 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).

8. The tapping device for producing self-clinching nuts according to claim 6, characterized in that: 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), and 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), and one end of the threaded rod (7) is fixedly connected to a clamping block (71). A guide plate (72) is symmetrically fixedly connected to the side of the clamping block (71) close to the concave transmission plate (5), and the guide plate (72) is slidably connected to the guide groove (53) left and right.

9. The tapping device for producing self-clinching nuts according to claim 8, characterized in that: 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).

10. The tapping device for producing self-clinching nuts according to claim 9, characterized in that: The locking bolt (82) is threadedly connected to the fixing block (8); the locking tooth block (83) is slidably connected to the contraction groove (81) up and down.

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