Tapping equipment for pressing rivet nut production

Abstract

The invention relates to the technical field of tapping machines, and provides tapping equipment for pressing rivet nut production, the tapping equipment comprises a tapping ring, clamping mechanisms, clamping mechanisms and a toothed plate, a fixed platform is located in the center of the tapping ring in a penetrating mode, and the two clamping mechanisms are slidably connected to the fixed platform on the two sides of the tapping ring correspondingly; the clamping mechanism is used for fixing axial rotation of the pressing rivet nut, the clamping mechanism is used for clamping and stabilizing the pressing rivet nut, the toothed plates are rotationally connected to the clamping mechanism and surround the pressing rivet nut, and a plurality of clamping teeth are arranged at the ends, close to the pressing rivet nut, of the toothed plates. By means of the technical scheme, the self-rotation type pressure riveting screw tapping device is used for solving the problem that in the prior art, when a pressure riveting screw is tapped, it is difficult to avoid self-rotation of the pressure riveting nut under the condition that cooling modes such as cooling oil are kept used.

Description

Technical Field

[0001] This invention relates to metal cutting and forming machine tools, and more specifically to the field of tapping machine technology, specifically to a tapping device for producing press-fit nuts. Background Technology

[0002] A tapping machine is a device used to cut threads on parts such as nuts. It also belongs to the field of metal cutting and forming machine tools. A press-fit nut is a fastener that is pressed and fixed on a sheet metal part. Through the internal thread of the press-fit nut, the sheet metal part can be threadedly connected to parts such as screws. One end of the press-fit nut is provided with a ring of protruding teeth. When connected to the sheet metal part, the sheet metal part is squeezed and deformed and engages with the protruding teeth. The end of the press-fit nut away from the protruding teeth is set as a cylinder.

[0003] Because most of the press-fit nut is cylindrical, it cannot be clamped and fixed like a polygonal nut. Therefore, when tapping the press-fit nut, the clamps on the tapping machine usually apply a sufficiently large axial clamping force to the end face of the press-fit nut to prevent it from rotating during tapping. However, by increasing the clamping force, it is impossible to spray cooling oil for cooling and chip removal when the tapping machine is continuously tapping, which affects the efficiency and accuracy of continuous tapping. Summary of the Invention

[0004] This invention proposes a tapping device for producing press-fit nuts, which solves the problem in the prior art that it is difficult to prevent the press-fit nut from rotating while maintaining cooling methods such as cooling oil when tapping press-fit screws.

[0005] The technical solution of the present invention is as follows: A tapping device for producing press-fit nuts includes a base, a tapping drill, and a fixed platform. The tapping drill is vertically and vertically connected to the base. The fixed platform is located below the tapping drill. The press-fit nut is detachably mounted on the fixed platform. The device also includes a tapping ring, a clamping mechanism, a locking mechanism, and a toothed plate. The tapping ring is fixedly connected to the fixed platform. The press-fit nut is positioned above the tapping ring. The drill bit on the tapping drill passes through the press-fit nut and extends into the tapping ring. The fixed platform is positioned through the center of the tapping ring. Two clamping mechanisms are provided. The mechanisms are arranged opposite to each other. The two clamping mechanisms are slidably connected to the fixed platform on both sides of the tapping ring. The clamping mechanism is used to fix the axial rotation of the rivet nut. The clamping mechanism is fixedly installed on the fixed platform and is used to clamp and stabilize the rivet nut. Multiple toothed plates are provided, and multiple toothed plates are rotatably connected to the clamping mechanism. Multiple toothed plates are arranged around the rivet nut. Multiple locking teeth are provided on the toothed plates near the end of the rivet nut. The locking teeth can mesh with the protruding teeth on the rivet nut. A sector gear is provided on the toothed plates.

[0006] When tapping the rivet nut, when the teeth on the multiple toothed plates engage with the protruding teeth on the rivet nut, the rivet nut is placed on the toothed plate, and the toothed plate contacts the tapping ring.

[0007] The clamping mechanism includes a clamping frame, a first drive cylinder, a push-rotating bar, and a second drive cylinder. The clamping frame is slidably connected to the fixed platform, and the toothed plate is rotatably connected to the clamping frame. The first drive cylinder is fixedly installed on the fixed platform, and its output end is fixedly connected to the clamping frame. The push-rotating bar is slidably connected to the clamping frame, and a rack is provided on the side of the push-rotating bar. The rack can mesh with the sector gear. The second drive cylinder is fixedly installed on the fixed platform, and its output end is fixedly connected to the push-rotating bar.

[0008] When the output end of the second drive cylinder shortens, the rack on the push bar separates from the sector gear.

[0009] Two operation windows are provided on the side of the fixed platform near the tapping drill, and the two clamping frames slide in the two operation windows respectively.

[0010] The clamping mechanism includes a third drive cylinder and a clamping component. There are two third drive cylinders, both of which are fixedly mounted on the fixed platform. The two third drive cylinders are arranged opposite each other between the two operating windows. The output end of each third drive cylinder is fixedly connected to the clamping component, and the clamping component is detachably connected to the rivet nut.

[0011] When the rack on the push bar comes into contact with the plurality of sector gears, the plurality of sector gears drive the plurality of tooth plates to deflect in opposite directions.

[0012] After the rivet nut is placed on the toothed plate, the output ends of the third drive cylinder, the first drive cylinder, and the second drive cylinder extend in sequence. At this time, the rivet nut is clamped and fixed, and the tapping drill can tap the rivet nut.

[0013] The working principle and beneficial effects of this invention are as follows: 1. In this invention, by setting toothed plates, multiple toothed plates arranged around the rivet nut work together to rivet the protruding teeth on the rivet nut. After riveting, the toothed plates are rotated in multiple directions. The rivet nut is pressed in multiple different directions by the teeth on the multiple toothed plates, thereby fixing the rivet nut in the rotation direction. Using the protruding teeth on the rivet nut for rotational fixing can avoid fixing the rivet nut by pressing it with excessive pressure, which may cause slippage and damage to the rivet nut. 2. In this invention, by setting a tapping ring, the tapping ring serves as a support for the toothed plate, which is used to mesh with the protruding teeth on the press-fit nut. At the same time, the hollow design of the tapping ring facilitates the drill bit to pass through the press-fit nut and enter the tapping ring when tapping. Also, since the center of the tapping ring is connected to the outside, the loose threads and cooling oil can be discharged through the center of the tapping ring. 3. In this invention, by setting a clamping mechanism, the rivet nut can be clamped and fixed in the horizontal direction, while keeping the center of the rivet nut aligned with the center of the tapping drill and maintaining its positioning. By setting a clamping mechanism, the toothed plate engages with the protruding teeth on the rivet nut to prevent the rivet nut from rotating. The combination of the clamping mechanism and the clamping mechanism can fix the position and rotation of the rivet nut, avoiding the problems of traditional fixing methods that rely on strong pressing, which cannot use cooling oil to maintain friction, and may cause deformation of the rivet nut if the pressure is too high. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a 3D physical image of a tapping device for producing press-fit nuts according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the fixed platform from another perspective in this invention; Figure 4 This is a cross-sectional internal structure diagram of the fixed platform in this invention; Figure 5This is a cross-sectional view of the internal structure of the fixed platform in this invention from another perspective. Figure 6 This is a cross-sectional internal structure diagram of the clamping frame in this invention; Figure 7 This is a partial cross-sectional view of the internal structure of the clamping frame from another perspective in this invention; Figure 8 This is a partial structural diagram of the limiting shovel and the press-fit nut in this invention.

[0016] In the diagram: 1. Base; 2. Tapping drill; 3. Fixing platform; 4. Tapping ring; 5. Toothed plate; 6. Sector gear; 7. Clamping frame; 8. Drive cylinder one; 9. Push bar; 10. Drive cylinder two; 11. Operating window; 12. Drive cylinder three; 13. Clamping component; 14. Limiting post; 15. Limiting shovel. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 8As shown, the tapping machine in this embodiment belongs to metal cutting and forming machine tools. It proposes a tapping device for producing press-fit nuts, including a base 1, a tapping drill 2, and a fixed platform 3. The tapping drill 2 is vertically and vertically connected to the base 1. The fixed platform 3 is located below the tapping drill 2. The press-fit nut is detachably mounted on the fixed platform 3. It also includes a tapping ring 4, a clamping mechanism, a clamping mechanism, and toothed plates 5. The tapping ring 4 is fixedly connected to the fixed platform 3. The press-fit nut is located above the tapping ring 4. The drill bit on the tapping drill 2 passes through the press-fit nut and can extend into the tapping ring 4. The fixed platform 3 is positioned through the center of the tapping ring 4. Two clamping mechanisms are provided, facing each other, and slidably connected to the fixed platform 3 on both sides of the tapping ring 4. The clamping mechanisms are used to fix the axial rotation of the press-fit nut. The clamping mechanisms are fixedly mounted on the fixed platform 3 and are used to clamp and stabilize the press-fit nut. Multiple toothed plates 5 are provided, each rotatably connected to the clamping mechanism. The toothed plate 5 is arranged around the rivet nut. Multiple retaining teeth are provided on one end of the toothed plate 5 near the rivet nut. The retaining teeth can mesh with the protruding teeth on the rivet nut. The toothed plate 5 is provided with a sector gear 6. In this application, by setting the toothed plate 5, the retaining teeth on the toothed plate 5 can engage with the annular protruding teeth on the rivet nut. When the rivet nut is placed on the toothed plate 5, the toothed plate 5 arranged around the rivet nut can mesh with the protruding teeth on the rivet nut at multiple positions. At this time, by driving the multiple toothed plates 5 to rotate in different directions, the retaining teeth can squeeze the protruding teeth, so that the rivet nut cannot rotate. At the same time, the clamping mechanism fixes the rivet nut and keeps the center of the rivet nut aligned with the center of the tapping drill 2. The clamping mechanism can prevent the rivet nut from moving in the horizontal direction and keep the center aligned. The toothed plate 5 clamps the rotation of the rivet nut through the clamping mechanism. The combination of these measures achieves the fixation of the rivet nut and the prevention of rotation. At the same time, the tapping ring 4 supports the rivet nut on the one hand and facilitates the discharge of debris and coolant on the other.

[0019] like Figures 5 to 7 As shown, when tapping the rivet nut, when the retaining teeth on multiple toothed plates 5 mesh with the protruding teeth on the rivet nut, the rivet nut is placed on the toothed plate 5, and the toothed plate 5 contacts the tapping ring 4. When the rivet nut is placed on the toothed plate 5, the lower part of the toothed plate 5 contacts the tapping ring 4. The output end of the drive cylinder 8 pushes the clamping frame 7 to slide, pushing the retaining teeth on the toothed plate 5 to engage with the protruding teeth. When the toothed plate 5 is engaged with the rivet nut, the retaining teeth on the toothed plate 5 will engage with the protruding teeth, causing the toothed plate 5 to deflect. The toothed plate 5 is automatically deflected by the squeezing force when it contacts the rivet nut. The toothed plate 5 is set to be able to rotate on its own, so that when the rivet nut is placed at different angles, the toothed plate 5 can rotate to the engagement angle on its own, which facilitates the docking of the rivet nut and the toothed plate 5.

[0020] like Figures 4 to 6 As shown, the clamping mechanism includes a clamping frame 7, a first drive cylinder 8, a pusher bar 9, and a second drive cylinder 10. The clamping frame 7 is slidably connected to the fixed platform 3, and the toothed plate 5 is rotatably connected to the clamping frame 7. The first drive cylinder 8 is fixedly installed on the fixed platform 3, and its output end is fixedly connected to the clamping frame 7. The pusher bar 9 is slidably connected to the clamping frame 7, and a rack is provided on the side of the pusher bar 9. The rack can mesh with the sector gear 6. The second drive cylinder 10 is fixedly installed on the fixed platform 3, and its output end is fixedly connected to the pusher bar 9. In this embodiment, each clamping frame 7 is provided with two toothed plates 5, which are respectively provided on both sides of the clamping frame 7. The pusher bar is provided between the two toothed plates 5, which are arranged opposite each other. The sector gears 6 on the two toothed plates 5 are both facing the pusher bar. When the output end of the first drive cylinder 8 extends and pushes the clamping frame 7 to slide, the toothed plate 5 engages with the rivet nut. The angle of each toothed plate 5 may differ. The output end of the drive cylinder 2 10 pushes the push bar 9 to slide towards the rivet nut. The push bar 9 has racks on both sides. When the racks contact the teeth on the sector gear 6, they can drive the sector gear 6 to rotate. Since the two toothed plates 5 are arranged opposite each other, when the two toothed plates 5 are pushed by the push bar 9, they will rotate in two opposite directions. The rivet nut is pushed in two directions. When all four toothed plates 5 on the two clamping frames 7 are in contact with the rivet nut and are pressed in different directions, the rivet nut is supported and pressed by the four toothed plates 5 and cannot rotate. Four limiting posts 14 are fixedly connected to the clamping frame 7. Each side of the toothed plate 5 is provided with a limiting post 14, which can limit the rotation range of the toothed plate 5 to prevent the toothed plate 5 from rotating away from the rivet nut when it is not in contact with the rivet nut, so that it cannot contact the rivet nut.

[0021] like Figures 1 to 4 As shown, two operation windows 11 are provided on the side of the fixed platform 3 near the tapping drill 2. The two clamping frames 7 slide in the two operation windows 11 respectively. The clamping member 13 slides on the fixed platform 3 without contacting the operation window 11. The fixed platform 3 can separate the clamping member 13 from the toothed plate 5 to avoid mutual interference during clamping.

[0022] like Figures 1 to 3 As shown, the clamping mechanism includes a drive cylinder 12 and a clamping element 13. There are two drive cylinders 12, both of which are fixedly mounted on the fixed platform 3. The two drive cylinders 12 are arranged opposite each other between the two operating windows 11. The output end of each drive cylinder 12 is fixedly connected to a clamping element 13. The clamping element 13 is detachably connected to the rivet nut. The clamping element 13 is C-shaped. The two clamping elements 13 clamp and fix the rivet nut to prevent it from sliding. At the same time, the output ends of the two drive cylinders 12 extend to the same length to keep the rivet nut aligned with the center of the tapping drill 2.

[0023] like Figures 5 to 7 As shown, when the output end of the second drive cylinder 10 shortens, the rack on the push bar 9 separates from the sector gear 6. When the rack on the push bar 9 contacts multiple sector gears 6, the multiple sector gears 6 drive multiple tooth plates 5 to deflect in opposite directions. When the output end of the first drive cylinder 8 pushes the tooth plate 5 to contact the rivet nut, the push bar 9 does not contact the sector gear 6, and does not affect the rotation of the tooth plate 5 when it is pressed against the rivet nut.

[0024] like Figures 4 to 7 As shown, after the rivet nut is placed on the toothed plate 5, the output ends of drive cylinder 3 12, drive cylinder 1 8 and drive cylinder 2 10 extend in sequence. At this time, the rivet nut is clamped and fixed, and the tapping drill 2 can tap the rivet nut. The output ends of the two drive cylinders 3 12 extend to the same length to push the clamping piece 13 to clamp and fix the rivet nut, keeping the position of the rivet nut. However, at this time, the rivet nut may rotate during tapping. At this time, the output end of drive cylinder 1 8 extends to push the toothed plate 5 to mesh with the rivet nut. The output end of drive cylinder 1 extends to push the pusher bar 9 to slide and contact the sector gear 6, causing the toothed plate 5 to deflect. At this time, the rivet nut is fixed and difficult to rotate, so tapping can be performed.

[0025] like Figures 5 to 8 As shown, a limiting shovel 15 is provided on the toothed plate 5 near the tooth. When the toothed plate 5 is pushed by the clamping frame 7, the limiting shovel 15 can be inserted into the gap between the protrusion and the bevel on the rivet nut. As the toothed plate 5 gradually approaches the rivet nut, the limiting shovel 15 contacts the bevel and squeezes the bevel, so that the rivet nut and the toothed plate 5 are tightly attached. This can prevent the rivet nut from being vibrated and separating from the toothed plate 5 when the tapping drill 2 is tapping the rivet nut. At the same time, when the rivet nut is not placed stably or has a certain tilt angle, the limiting shovel 15 will abut against the bevel of the rivet nut, so that the toothed plate 5 cannot move towards the rivet nut and the clamping frame 7 cannot continue to move, thereby achieving the function of detecting the placement position of the rivet nut.

[0026] When the toothed plate 5 contacts the protruding teeth on the rivet nut, the locking teeth and the protruding teeth contact and squeeze, and automatically rotate to an intersecting angle. At this time, all four toothed plates 5 are riveted to the protruding teeth on the rivet nut. When tapping different types of rivet nuts, the position of the clamping frame 7 can be adjusted. The output end of the drive cylinder 8 drives the clamping frame 7 to slide at the distance that matches the rivet nut. The locking teeth on the toothed plate 5 can be fixed by engaging with the protruding teeth on the rivet nut. The interior of the clamping member 13 is set with an inclined straight edge, which can be used for rivet nuts of various sizes. Therefore, this application can be used for rivet nuts of various types to prevent the rivet nut from rotating on its own.

[0027] In this embodiment, the rivet nut is placed in the center of the four toothed plates 5, and the protruding teeth on the rivet nut are in the center of the four toothed plates 5. At this time, the output end of the drive cylinder 3 12 extends and pushes the clamping member 13 to slide on the fixed platform 3 to clamp the rivet nut. At this time, the output ends of multiple drive cylinders 1 8 extend simultaneously and push the two clamping frames 7 to slide towards the rivet nut. The clamping teeth on the toothed plate 5 contact the protruding teeth on the rivet nut. The toothed plate 5 deflects during the contact process, so that the clamping teeth on the toothed plate 5 mesh with the protruding teeth on the rivet nut. At this time, the output end of the drive cylinder 2 10 extends and pushes the pusher bar 9 to slide towards the rivet nut. When the racks on both sides of the pusher bar 9 contact the sector gear 6, they drive the sector gear 6 to rotate. At this time, the four racks deflect in different directions and squeeze the rivet nut. At this time, the rivet nut is difficult to rotate on its own. The tapping drill 2 can tap the rivet nut. The chips generated by tapping can be discharged to the outside of the fixed platform 3 through the tapping ring 4.

[0028] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tapping device for producing press-fit nuts, comprising a base (1), a tapping drill (2), and a fixed platform (3), wherein the tapping drill (2) is vertically and vertically connected to the base (1), the fixed platform (3) is disposed below the tapping drill (2), and the press-fit nut is detachably disposed on the fixed platform (3), characterized in that, Also includes: The tapping ring (4) is fixedly connected to the fixed platform (3), and the rivet nut is set above the tapping ring (4). The drill bit on the tapping drill (2) can extend into the tapping ring (4) after passing through the rivet nut. Two clamping mechanisms are provided, which are arranged opposite to each other. The two clamping mechanisms are slidably connected to the fixed platform (3) on both sides of the tapping ring (4). The clamping mechanisms are used to fix the axial rotation of the rivet nut. A clamping mechanism is fixedly installed on the fixed platform (3), and the clamping mechanism is used to clamp and stabilize the rivet nut; Multiple toothed plates (5) are provided, and all of the toothed plates (5) are rotatably connected to the clamping mechanism. The multiple toothed plates (5) are arranged around the rivet nut. Multiple locking teeth are provided on one end of the toothed plate (5) near the rivet nut. The locking teeth can engage with the protruding teeth on the rivet nut.

2. The tapping equipment for producing press-fit nuts according to claim 1, characterized in that, When tapping the rivet nut, when the teeth on the multiple toothed plates (5) mesh with the protruding teeth on the rivet nut, the rivet nut is placed on the toothed plates (5), and the toothed plates (5) come into contact with the tapping ring (4).

3. The tapping equipment for producing press-fit nuts according to claim 2, characterized in that, A sector gear (6) is provided on the toothed plate (5).

4. The tapping equipment for producing press-fit nuts according to claim 3, characterized in that, The clamping mechanism includes: The clamping frame (7) is slidably connected in the fixed platform (3), and the toothed plate (5) is rotatably connected to the clamping frame (7); Drive cylinder 1 (8) is fixedly installed on the fixed platform (3), and the output end of drive cylinder 1 (8) is fixedly connected to the clamping frame (7); The push bar (9) is slidably connected to the clamping frame (7). A rack is provided on the side of the push bar (9), and the rack can mesh with the sector gear (6). Drive cylinder two (10) is fixedly installed on the fixed platform (3), and the output end of drive cylinder two (10) is fixedly connected to the push bar (9).

5. The tapping equipment for producing press-fit nuts according to claim 4, characterized in that, When the output end of the second drive cylinder (10) shortens, the rack on the push bar (9) separates from the sector gear (6).

6. The tapping equipment for producing press-fit nuts according to claim 5, characterized in that, Two operation windows (11) are provided on the side of the fixed platform (3) near the tapping drill (2), and the two clamping frames (7) slide in the two operation windows (11) respectively.

7. The tapping equipment for producing press-fit nuts according to claim 6, characterized in that, The clamping mechanism includes: There are two drive cylinders (12), both of which are fixedly installed on the fixed platform (3) and are arranged facing each other between the two operation windows (11). Clamping member (13) is fixedly connected to the output end of each of the three drive cylinders (12), and the clamping member (13) is detachably connected to the rivet nut.

8. The tapping equipment for producing press-fit nuts according to claim 5, characterized in that, When the rack on the push bar (9) comes into contact with the multiple sector gears (6), the multiple sector gears (6) drive the multiple tooth plates (5) to deflect in opposite directions.

9. The tapping equipment for producing press-fit nuts according to claim 7, characterized in that, After the rivet nut is placed on the toothed plate (5), the output ends of the third drive cylinder (12), the first drive cylinder (8) and the second drive cylinder (10) extend in sequence. At this time, the rivet nut is clamped and fixed, and the tapping drill (2) can tap the rivet nut.

10. The tapping equipment for producing press-fit nuts according to claim 1, characterized in that, The fixed platform (3) is positioned through the center of the tapping ring (4).

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