Hollow rivet spinning tool

Abstract

The hollow rivet spinning tool comprises a lining, a clamping groove is formed in one end of the lining, one end of a steel pipe is clamped in the clamping groove, a protruding block is arranged at one end of a core shaft, the protruding block is located in the end, away from the clamping groove, of the steel pipe, arc-shaped grooves are formed in the end face of the core shaft and located on the periphery of the protruding block, and a shaft sleeve is arranged on the core shaft in a sleeved mode. The mandrel is rotationally connected with the shaft sleeve through a bearing, and the shaft sleeve is installed in the shaft hole of the clamping seat. Relative continuous feeding of the bushing and the clamping seat is controlled through a numerical control lathe, so that the steel pipe is rotated, pressed and continuously and gradually deformed, finally, the shape of the hollow rivet is manufactured, flanging burrs are reduced, the appearance quality of the rivet is improved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rivet processing, and in particular relates to a hollow rivet spinning tool. Background Art

[0002] Fasteners include bolts, screws, nuts, rivets, etc., and the molding processes involved include cold heading, hot heading, punching, machining, rolling, etc. Among the rivet products, there is a type of hollow rivet. The general molding process for this type of rivet is stamping. The products processed by traditional stamping process have rough surfaces and have flanging burrs after stamping. Therefore, the product needs to add a deburring process, which is time-consuming, labor-intensive, and inefficient. Utility Model Content

[0003] Therefore, the utility model aims to solve the problem in the prior art that flange burrs exist after stamping is completed, so that the product needs to add a deburring process, which is time-consuming, labor-intensive, and inefficient.

[0004] To this end, the technical solution adopted is that the utility model provides a hollow rivet spinning tool, including: a bushing, a slot is provided at one end of the bushing, one end of the steel pipe is clamped in the slot, a protrusion is provided at one end of the core shaft, the protrusion is located in the end of the steel pipe away from the slot, an arc-shaped groove is provided on the end face of the core shaft around the protrusion, a sleeve is provided on the core shaft, the core shaft and the sleeve are rotatably connected through a bearing, and the sleeve is installed in the shaft hole of the base.

[0005] Preferably, the bump is hemispherical.

[0006] Preferably, a threaded hole is provided at the left end of the bushing, and the threaded hole is connected to the slot through a connecting hole. One end of the pin passes through the connecting hole and extends into the slot. A spring is sleeved on the other end of the pin, and a baffle is provided on the pin. The baffle contacts the bottom wall of the threaded hole. A screw plug is threadedly connected to the threaded hole, one end of the spring contacts the screw plug, and the other end of the screw plug contacts the baffle.

[0007] Preferably, three openings are arranged on the right end surface of the bushing at intervals along the circumferential direction, and the openings are connected to the slot.

[0008] Preferably, a blocking cover is provided on one end of the core shaft away from the protrusion, and a first fixing screw is provided on the outer wall of the blocking cover.

[0009] Preferably, a second set screw is provided on the outer wall of the holder.

[0010] The technical solution of the utility model has the following advantages: the relative continuous feeding of the bushing and the holder is controlled by a CNC lathe, so that the steel pipe is rotated and compressed and produces continuous and gradual deformation, and finally is made into the shape of a hollow rivet, thereby reducing flanging burrs, improving the appearance quality of the rivet, and improving processing efficiency.

[0011] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0012] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is an internal exploded schematic diagram of the bushing in the utility model;

[0016] Figure 3 It is a right side view of the shaft sleeve of the utility model;

[0017] Figure 4 This is a schematic diagram of the connection between the core shaft and the sleeve of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the clamping seat and the second set screw in the utility model;

[0019] Among them, 1. bushing; 2. slot; 3. steel pipe; 4. core shaft; 5. bump; 6. arc groove; 7. sleeve; 8. bearing; 9. seat; 10. shaft hole; 11. threaded hole; 12. connecting hole; 13. pin; 14. spring; 15. baffle; 16. screw plug; 17. opening; 18. plug cover; 19. first set screw; 20. second set screw. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] The utility model provides a hollow rivet spinning tool, such as Figure 1-5 As shown, it includes: a bushing 1, a groove 2 is provided at one end of the bushing 1, one end of the steel pipe 3 is clamped in the groove 2, a protrusion 5 is provided at one end of the core shaft 4, the protrusion 5 is located in the end of the steel pipe 3 away from the groove 2, an arc groove 6 is provided on the end surface of the core shaft 4 around the protrusion 5, a sleeve 7 is sleeved on the core shaft 4, the core shaft 4 and the sleeve 7 are rotatably connected through a bearing 8, and the sleeve 7 is installed in the shaft hole 10 of the holder 9.

[0025] The protrusion 5 is hemispherical, which is convenient for inserting into the steel pipe 3. A threaded hole 11 is provided at the left end of the bushing 1. The threaded hole 11 is connected to the card slot 2 through the connecting hole 12. One end of the pin 13 passes through the connecting hole 12 and extends into the card slot 2. A spring 14 is sleeved on the other end of the pin 13. A baffle 15 is provided on the pin 13. The baffle 15 contacts the bottom wall of the threaded hole 11. A screw plug 16 is threadedly connected to the threaded hole 11. One end of the spring 14 contacts the screw plug 16, and the other end of the screw plug 16 contacts the baffle 15. When the mandrel 4 contacts the pin 13 during the rotation and extrusion process, the spring 14 is extruded and deformed, which plays a buffering role to prevent the mandrel from being damaged. Three openings 17 are provided on the right end surface of the bushing 1 along the circumferential intervals. The opening 17 is connected to the card slot 2, so that the processed hollow rivet can be easily taken out through the opening. A plug cover 18 is provided on one end of the core shaft 4 away from the protrusion 5, and a first set screw 19 is provided on the outer wall of the plug cover 18 for fixing the plug cover. A second set screw 20 is provided on the outer wall of the holder 9 for fixing the sleeve 7 in the shaft hole 10 of the holder 9.

[0026] The beneficial technical effects of the above technical scheme are as follows: the bushing 1 is installed on the workpiece chuck of the CNC lathe, one end of the steel pipe 3 is clamped in the slot 2, the holder 9 is installed on the tool holder, and the sleeve 7 is fixed in the holder 9. By adjusting the tool holder of the lathe, the protrusion 5 of the core shaft 4 is moved to the other end of the steel pipe 3, and the CNC lathe is started. The lathe spindle drives the bushing 1 and the steel pipe 3 to rotate. As the core shaft 4 is continuously fed, the steel pipe 3 contacts the arc-shaped groove 6 of the core shaft 4, thereby driving the core shaft 4 to rotate with the steel pipe 3. As the CNC lathe controls the relative continuous feeding of the bushing 1 and the holder 9, the steel pipe rotates and is compressed and continuously and gradually deformed, and is finally made into the shape of a hollow rivet, reducing the flanging burrs, improving the appearance quality of the rivet, and improving the processing efficiency.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A hollow rivet spinning tool, characterized in that: include: A bushing (1) is provided with a slot (2) at one end of the bushing (1), one end of a steel pipe (3) is clamped in the slot (2), one end of a core shaft (4) is provided with a protrusion (5), the protrusion (5) is located in the end of the steel pipe (3) away from the slot (2), an arc-shaped groove (6) is provided around the protrusion (5) on the end surface of the core shaft (4), a shaft sleeve (7) is sleeved on the core shaft (4), the core shaft (4) and the shaft sleeve (7) are rotatably connected through a bearing (8), and the shaft sleeve (7) is installed in an axial hole (10) of a clamping seat (9).

2. A hollow rivet spinning tool according to claim 1, characterized in that: The projection (5) is hemispherical.

3. The hollow rivet spinning tool according to claim 1, characterized in that: A threaded hole (11) is provided at the left end of the bushing (1), the threaded hole (11) is communicated with the slot (2) through a connecting hole (12), one end of a pin (13) passes through the connecting hole (12) and extends into the slot (2), a spring (14) is sleeved on the other end of the pin (13), a blocking piece (15) is provided on the pin (13), the blocking piece (15) contacts the bottom wall of the threaded hole (11), a screw plug (16) is threadedly connected to the threaded hole (11), one end of the spring (14) contacts the screw plug (16), and the other end of the screw plug (16) contacts the blocking piece (15).

4. The hollow rivet spinning tool according to claim 1, characterized in that: Three openings (17) are arranged at intervals along the circumferential direction on the right end surface of the bushing (1), and the openings (17) are communicated with the clamping groove (2).

5. The hollow rivet spinning tool according to claim 1, characterized in that: A blocking cover (18) is arranged on one end of the core shaft (4) away from the protrusion (5), and a first fixing screw (19) is arranged on the outer wall of the blocking cover (18).

6. The hollow rivet spinning tool according to claim 1, characterized in that: A second fixing screw (20) is arranged on the outer wall of the holder (9).

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