Four-section rivet cold heading die
By introducing an adjustment component into the four-section rivet cold heading die, the problem of difficult adjustment of the ejector preload force was solved, precise control of the ejector stroke and spring preload force was achieved, and the processing accuracy and efficiency of the die were improved.
Patent Information
- Application Number
- CN202422780850.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-14
AI Technical Summary
During use of the existing four-section rivet cold heading die, it is difficult to adjust the preload force of the spring sleeved on the ejector pin, resulting in difficulty in controlling the stroke and preload degree of the ejector pin.
A four-section rivet cold heading die was designed. By setting an adjustment component on the die shell, including an outer sleeve, an inner sleeve and an adjustment cylinder, combined with a retaining ring and a spring, the stroke of the ejector and the spring preload force can be adjusted, ensuring that the stroke of the ejector is determined by the retaining ring and the adjustment component, and the preload degree of the spring is adjustable.
The precise control of ejector stroke and adjustment of spring preload force are achieved, thus improving the utilization efficiency and processing accuracy of the mold.
Smart Images
Figure CN223352833U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rivet cold heading dies, in particular to a four-section rivet cold heading die. Background Art
[0002] A rivet is a nail-shaped object used to connect two parts (or components) with a through hole and a cap at one end. During riveting, the parts are connected by deformation or interference fit. Rivets come in many different types and styles. Typical rivet processing involves coiling, pickling, phosphating, saponification, drying, cold drawing, crystallization annealing, finish drawing, extrusion molding on a multi-station cold heading machine (including shearing, heading, and hollowing), surface nickel or zinc plating, and a final "marking" test.
[0003] When processing and forming four-section rivets, a corresponding cold heading die is required. During the use of the four-section rivet cold heading die, after a punching die impact, the impacted rivet workpiece needs to be ejected by an ejector pin. The existing four-section rivet cold heading die is usually inconvenient to adjust the preload force of the spring set on the ejector pin. Utility Model Content
[0004] The utility model provides a four-section rivet cold heading die to solve the problems in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a four-section rivet cold heading mold, comprising a mold shell, the interior of the mold shell is formed with an upper mounting cavity and a lower mounting cavity that are connected to each other, the upper mounting cavity is equipped with a mold core with a mold cavity, the bottom of the mold core is provided with a threaded connecting column with an external thread, the lower mounting cavity is installed with a threaded connecting column, the threaded connecting column is provided with a through hole corresponding to the mold cavity, the bottom of the mold shell is connected to the main mold, the bottom of the threaded connecting column is provided with a groove corresponding to the through hole, a pin that passes through the groove and the main mold is movably provided in the mold cavity, the pin is fixed with a retaining ring located in the groove, the bottom end of the retaining ring is connected to a spring sleeved on the pin, and the mold shell is provided with an adjustment component for adjusting the spring preload force.
[0006] Furthermore, an inner wall of the lower installation cavity is formed with an internal thread and is threadedly connected to a threaded connecting column.
[0007] Furthermore, the threaded connection column is integrally connected to the mold core.
[0008] Furthermore, the adjustment assembly includes an outer sleeve and an inner sleeve. A screw hole that cooperates with the groove is opened at the bottom of the main mold. The screw hole is threadedly connected to an outer sleeve with an internal threaded hole. The internal threaded hole of the outer sleeve is threadedly connected to an inner sleeve that can be movably passed by a pin. The top end of the inner sleeve is connected to the bottom end of the spring.
[0009] Furthermore, the adjustment component includes an adjustment cylinder, the bottom of the main mold is provided with a screw hole that matches the groove, the screw hole is threadedly connected to the adjustment cylinder, and the top end of the adjustment cylinder is connected to the bottom end of the spring.
[0010] Furthermore, a fixing ring is provided on the mold shell, and a screw hole is opened on the fixing ring. The fixing ring is connected to the main mold through the screw hole and the screw.
[0011] Compared with the prior art, the utility model provides a four-section rivet cold heading die, which has the following beneficial effects: in the four-section rivet cold heading die, the stroke of the ejector is determined by the retaining ring and the adjustment assembly, and at the same time, the adjustment assembly can adjust the position relative to the mold shell, and can adjust the preload degree of the spring sleeved on the ejector. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural diagram of the utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the adjusting component under the adjusting cylinder of the utility model;
[0014] Figure 3 This is a schematic structural diagram of the mold shell of the present utility model;
[0015] Figure 4 It is a structural schematic diagram of the mold core of the present utility model.
[0016] In the figure: 1. mold shell; 2. mold core; 3. mold cavity; 4. threaded connecting column; 5. lower mounting cavity; 6. upper mounting cavity; 7. main mold; 8. ejector pin; 9. retaining ring; 10. groove; 11. spring; 12. screw hole; 13. outer sleeve; 14. inner sleeve; 15. adjusting cylinder; 16. fixing ring; 17. screw hole. DETAILED DESCRIPTION
[0017] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0018] See also Figure 1-4The utility model discloses a four-section rivet cold heading die, including a die shell 1, wherein the interior of the die shell 1 is formed with an upper mounting cavity 6 and a lower mounting cavity 5 that are connected to each other, a die core 2 with a die cavity 3 is assembled in the upper mounting cavity 6, a threaded connecting column 4 with an external thread is provided at the bottom of the die core 2, a threaded connecting column 4 is installed on the lower mounting cavity 5, and a through hole is provided on the threaded connecting column 4 corresponding to the die cavity 3, a main die 7 is connected to the bottom of the die shell 1, and a groove corresponding to the through hole is provided at the bottom of the threaded connecting column 4 10. A pin 8 passing through the groove 10 and the main mold 7 is movably provided in the mold cavity 3. A retaining ring 9 located in the groove 10 is fixedly sleeved on the pin 8. The bottom end of the retaining ring 9 is connected to a spring 11 sleeved on the pin 8. The mold shell 1 is provided with an adjusting component for adjusting the preload force of the spring 11. In this four-section rivet cold heading mold, the stroke of the pin 8 is determined by the retaining ring 9 and the adjusting component. At the same time, the adjusting component can be adjusted in position relative to the mold shell 1, and can adjust the preload degree of the spring 11 sleeved on the pin 8.
[0019] The upper mounting cavity 6 is a truncated cone-shaped hole, the inner diameter of the top of the upper mounting cavity 6 is smaller than the inner diameter of its bottom end, and the mold core 2 is matched with the upper mounting cavity 6, that is, the outer diameter of the top of the mold core 2 is smaller than the outer diameter of its bottom end.
[0020] An annular groove is provided at the connection between the upper mounting cavity 6 and the lower mounting cavity 5 , and a vent hole can be provided on the inner wall of the annular groove.
[0021] The mold cavity 3 is composed of a plurality of inner holes with different inner diameters.
[0022] Specifically, an inner wall of the lower installation cavity 5 is formed with an internal thread and is threadedly connected to the threaded connecting column 4 .
[0023] The threaded connection column 4 is integrally connected to the mold core 2 .
[0024] In this embodiment, the threaded connection column 4 is threadedly connected to the lower mounting cavity 5 , so that the mold core 2 is assembled on the upper mounting cavity 6 .
[0025] Specifically, the adjustment assembly includes an outer sleeve 13 and an inner sleeve 14. A screw hole 12 that cooperates with the groove 10 is provided at the bottom of the main mold 7. The screw hole 12 is threadedly connected to the outer sleeve 13 with an internal threaded hole. The internal threaded hole of the outer sleeve 13 is threadedly connected to the inner sleeve 14 that can be movably passed by the ejector pin 8. The top end of the inner sleeve 14 is connected to the bottom end of the spring 11.
[0026] In this embodiment, the inner diameter of the screw hole 12 is larger than the inner diameter of the groove 10, the outer diameter of the inner sleeve 14 is smaller than the inner diameter of the groove 10, the distance between the outer sleeve 13 and the retaining ring 9 is used to limit the formation of the ejector pin 8, and the distance between the inner sleeve 14 and the groove 10 is used to adjust the preload degree of the spring 11.
[0027] Specifically, the adjustment component includes an adjustment cylinder 15 , and a screw hole 12 that cooperates with the groove 10 is opened at the bottom of the main mold 7 . The screw hole 12 is threadedly connected to the adjustment cylinder 15 , and the top end of the adjustment cylinder 15 is connected to the bottom end of the spring 11 .
[0028] In this embodiment, the inner diameter of the screw hole 12 and the outer diameter of the adjusting tube 15 are larger than the inner diameter of the groove 10. A hole is provided on the adjusting tube 15 through which the ejector pin 8 passes. By adjusting the distance between the adjusting tube 15 and the threaded connecting column 4, the pre-tightening degree of the spring 11 can be controlled and adjusted.
[0029] Specifically, a fixing ring 16 is fixedly sleeved on the mold shell 1 , and a screw hole 17 is opened on the fixing ring 16 . The fixing ring 16 is connected to the main mold 7 through the screw hole 17 and the screw.
[0030] In this embodiment, screw holes 17 are evenly formed on the top of the fixing ring 16 .
[0031] The screw hole 17 is a countersunk hole.
[0032] In summary, in the four-section rivet cold heading die, the stroke of the ejector pin 8 is determined by the retaining ring 9 and the adjusting assembly. At the same time, the adjusting assembly can adjust the position relative to the mold shell 1 and adjust the preload degree of the spring 11 mounted on the ejector pin 8.
[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A four-section rivet cold heading die, comprising a die shell (1), characterized in that: The mold shell (1) is internally formed with an upper mounting cavity (6) and a lower mounting cavity (5) which are connected to each other. A mold core (2) with a mold cavity (3) is installed in the upper mounting cavity (6). A threaded connecting column (4) with an external thread is provided at the bottom of the mold core (2). The threaded connecting column (4) is installed on the lower mounting cavity (5). The threaded connecting column (4) is provided with a through hole corresponding to the mold cavity (3). The bottom of the mold shell (1) is connected to the main mold (7). The bottom of the threaded connecting column (4) is provided with a groove (10) corresponding to the through hole. A pin (8) passing through the groove (10) and the main mold (7) is movably provided in the mold cavity (3). A retaining ring (9) located in the groove (10) is fixedly sleeved on the pin (8). The bottom end of the retaining ring (9) is connected to a spring (11) sleeved on the pin (8). The mold shell (1) is provided with an adjustment component for adjusting the preload force of the spring (11).
2. A four-section rivet cold heading die according to claim 1, characterized in that: An inner wall of the lower mounting cavity (5) is formed with an internal thread and is threadedly connected to a threaded connection column (4).
3. The four-section rivet cold heading die according to claim 2, characterized in that: The threaded connection column (4) is integrally connected to the mold core (2).
4. The four-section rivet cold heading die according to claim 1, characterized in that: The adjustment assembly includes an outer sleeve (13) and an inner sleeve (14); a screw hole (12) matching the groove (10) is provided at the bottom of the main mold (7); the screw hole (12) is threadedly connected to the outer sleeve (13) having an internal threaded hole; the internal threaded hole of the outer sleeve (13) is threadedly connected to the inner sleeve (14) through which the ejector pin (8) can movably pass.
5. The four-section rivet cold heading die according to claim 4, characterized in that: The top end of the inner sleeve (14) is connected to the bottom end of the spring (11).
6. The four-section rivet cold heading die according to claim 1, characterized in that: The adjustment assembly includes an adjustment cylinder (15), a screw hole (12) that matches the groove (10) is opened at the bottom of the main mold (7), the screw hole (12) is threadedly connected to the adjustment cylinder (15), and the top end of the adjustment cylinder (15) is connected to the bottom end of the spring (11).
7. The four-section rivet cold heading die according to claim 1, characterized in that: A fixing ring (16) is fixedly sleeved on the mold shell (1), and a screw hole (17) is provided on the fixing ring (16).
8. The four-section rivet cold heading die according to claim 7, characterized in that: The fixing ring (16) is connected to the main mold (7) through the screw hole (17) and the screw.