Pressing rivet center upper die mechanism

Abstract

The utility model discloses a pressing rivet center upper die mechanism. The pressing rivet center upper die mechanism comprises a fixing base, an upper die clamping assembly, a plurality of upper dies, an X-axis moving platform, a Y-axis moving platform, an upper die storage mechanism and a pressing rivet driving piece. The upper die storage mechanism is arranged on the Y-axis moving platform; the plurality of upper dies are arranged on the upper die storage mechanism; the Y-axis moving platform is arranged on the X-axis moving platform and drives the upper die storage mechanism to move in the Y-axis direction. The X-axis moving platform is connected with the fixing base and drives the Y-axis moving platform to move in the X-axis direction. The pressing rivet driving piece is arranged on the fixing base, and the output end of the pressing rivet driving piece faces the upper die storage mechanism and is used for driving the upper die to move or press rivet; the upper die clamping assembly is connected with the output end of the rivet pressing driving piece. The upper die is aligned through automatic movement, the machining interruption time is shortened, and the production and machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting equipment, in particular to an upper die mechanism of a riveting center. Background Art

[0002] The riveting equipment is a special equipment for rivet connection, usually including an upper die mechanism and a lower die mechanism of a riveting center. The parts to be connected are moved between the upper die and the lower die, and then the rivets are assembled by directly pressing the upper die and the lower die together, so that the two parts can be connected together. Rivets have the characteristics of good connection stability and low-cost connection.

[0003] For different products and parts, there are different connection requirements. Even for the same product and parts produced in the same batch, there may be different riveting requirements. Therefore, during the riveting process, it is often necessary to manually replace the upper die to adapt to different rivets. However, replacing the upper die will cause the processing to be interrupted and reduce the production efficiency. Summary of the Utility Model

[0004] In order to solve the technical problem that the manual replacement of the upper die in the existing riveting equipment interrupts the processing and reduces the processing efficiency, one of the purposes of the utility model is to provide an upper die mechanism of a riveting center.

[0005] One of the purposes of the utility model is realized by adopting the following technical scheme:

[0006] An upper die mechanism of a riveting center, the upper die mechanism of the riveting center includes a fixed seat, an upper die clamping assembly, a plurality of upper dies, an X-axis moving platform, a Y-axis moving platform, an upper die storage mechanism and a riveting driving part;

[0007] The upper die storage mechanism is arranged on the Y-axis moving platform;

[0008] A plurality of the upper dies are arranged on the upper die storage mechanism;

[0009] The Y-axis moving platform is arranged on the X-axis moving platform, and the Y-axis moving platform drives the upper die storage mechanism to move along the Y-axis direction;

[0010] The X-axis moving platform is connected to the fixed seat, and the X-axis moving platform drives the Y-axis moving platform to move along the X-axis direction;

[0011] The riveting driving part is arranged on the fixed seat, and the output end of the riveting driving part faces the upper die storage mechanism for driving the upper die to move or rivet;

[0012] The upper die clamping assembly is connected to the output end of the riveting driving part for clamping the upper die during work.

[0013] Optionally, the upper die clamping assembly includes an upper die base and a pressure sensor, the pressure sensor is connected to the output end, and the upper die base is connected to the pressure sensor.

[0014] Optionally, a lower end surface of the upper die base is provided with an upper die sleeve;

[0015] The upper end of the upper die is movably inserted into the upper die sleeve;

[0016] The upper die clamping assembly further includes a locking collar, the locking collar is sleeved on the upper die sleeve and is used for loosening or locking the upper die.

[0017] Optionally, the locking collar is provided with an upper collar extending upward along its circumferential surface, and the upper collar is sleeved on the lower end of the upper die base;

[0018] Two high-pressure air channels connecting high-pressure air pipelines are provided on the upper die base, one of which is a locking air channel, and the locking air channel extends to the lower end surface and communicates with the internal space of the locking collar;

[0019] The other is a release air channel, and the release air channel extends to the lower end surface and communicates with the space inside the upper die sleeve;

[0020] A locking hole is provided on a side wall of the upper die sleeve;

[0021] The upper die clamping assembly further includes a movable member, the movable member is movably arranged in the locking hole, and a dimension of the movable member along the axial direction of the locking hole is greater than a length of the locking hole;

[0022] A lower part of an inner ring surface of the locking collar is provided with an annular inclined surface for abutting against the movable member.

[0023] Optionally, a locking groove is provided at the upper end of the upper die. When the upper end of the upper die is inserted into the upper die sleeve, the locking groove is aligned with the locking hole.

[0024] Optionally, the lower end surface is provided with a receiving groove surrounding the upper die sleeve;

[0025] The upper die clamping assembly further includes an elastic member, the elastic member is sleeved on the upper die sleeve, an upper end of the elastic member extends into the receiving groove, and a lower end of the elastic member abuts against the locking collar.

[0026] Optionally, a clamping groove is provided at a terminal end of the upper die sleeve, and a position of the clamping groove is lower than a position of the locking collar;

[0027] The upper die clamping assembly further includes a snap ring for limiting a position of the locking collar, and the snap ring is clamped on the clamping groove.

[0028] Optionally, the X-axis moving platform includes a connecting frame, an X-axis guide rail, an X-axis driving mechanism, a lead screw, a nut, and an X-axis slider. The connecting frame is connected to the fixed seat. The X-axis guide rail and the lead screw are arranged on the connecting frame. The X-axis driving mechanism is connected to the lead screw. The nut is arranged on the lead screw. The X-axis slider is slidably arranged on the X-axis guide rail. The X-axis slider is connected to the nut;

[0029] The Y-axis moving platform is arranged on the X-axis slider.

[0030] Optionally, the Y-axis moving platform includes a mounting plate, a Y-axis guide rail, a Y-axis driving mechanism, and a Y-axis slider. The mounting plate is connected to the X-axis moving platform. The Y-axis guide rail is arranged on the mounting plate. The Y-axis slider is slidably arranged on the Y-axis guide rail. The Y-axis driving mechanism is connected to the Y-axis slider. The Y-axis driving mechanism drives the Y-axis slider to move in the Y-axis direction;

[0031] The upper die storage mechanism is arranged on the Y-axis slider.

[0032] Optionally, the upper die storage mechanism is a storage frame. The storage frame includes multiple connecting rods. A number of upper die holes for mounting upper dies are provided on one of the connecting rods.

[0033] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0034] An upper die clamping assembly is arranged at the output end of the riveting driving part. The upper die clamping assembly clamps the upper die. Driven by the riveting driving part, the upper die moves or performs riveting. The X-axis moving platform is connected to the fixed seat. The Y-axis moving platform is arranged on the X-axis moving platform. The upper die storage mechanism is arranged on the Y-axis moving platform. And the upper die is arranged on the upper die storage mechanism. In this way, each upper die can move in the X-axis direction or the Y-axis direction driven by the X-axis moving platform and the Y-axis moving platform, so as to drive the upper die to move below the upper die clamping assembly. The riveting driving part drives the upper die clamping assembly to lift and lower, so as to realize the unloading, loading and clamping of the upper die, and further realize the replacement of the upper die. By automatically moving and aligning the upper die, the processing interruption time is reduced and the production and processing efficiency is improved. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of the upper die mechanism of the riveting center of the present utility model;

[0036] Figure 2 It is a schematic structural diagram of another perspective of the upper die mechanism of the riveting center of the present utility model;

[0037] Figure 3 It is an exploded schematic diagram of the upper die mechanism of the riveting center of the present utility model;

[0038] Figure 4 This is a schematic structural diagram of the Y-axis moving platform in the upper die mechanism of the riveting center of the present utility model;

[0039] Figure 5 This is a schematic structural diagram of the upper die clamping assembly in the upper die mechanism of the present utility model;

[0040] Figure 6 This is a schematic cross-sectional view of the upper die clamping assembly in the upper die mechanism of the present utility model.

[0041] Explanation of the attached drawing reference numerals:

[0042] 1. Fixed seat;

[0043] 2. Upper die clamping assembly; 21. Upper die seat; 211. Upper die sleeve; 212. Locking air duct; 213. Release air duct; 214. Locking hole; 215. Accommodating groove; 22. Pressure sensor; 23. Locking collar; 231. Upper collar; 232. Annular inclined surface; 24. Movable part; 25. Elastic part; 26. Snap ring;

[0044] 3. Upper die; 31. Locking groove;

[0045] 4. X-axis moving platform; 41. Connecting frame; 42. X-axis guide rail; 43. X-axis driving mechanism; 44. Lead screw; 45. Nut; 46. X-axis slider;

[0046] 5. Y-axis moving platform; 51. Installation plate; 52. Y-axis guide rail; 53. Y-axis driving mechanism; 54. Y-axis slider;

[0047] 6. Upper die storage mechanism;

[0048] 7. Riveting driving part; 71. Output end. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present application. Figure 1 to the attached drawings Figure 6 It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0052] As Figures 1 to 3 shown, the present utility model provides a riveting center upper die mechanism. The riveting center upper die mechanism includes a fixed seat 1, an upper die clamping assembly 2, a plurality of upper dies 3, an X-axis moving platform 4, a Y-axis moving platform 5, an upper die storage mechanism 6, and a riveting driving member 7.

[0053] The upper die storage mechanism 6 is an installation structure for idle or to-be-switched upper dies 3, that is, a plurality of upper dies 3 are arranged on the upper die storage mechanism 6, and the upper die storage mechanism 6 is arranged on the Y-axis moving platform 5. The Y-axis moving platform 5 is arranged on the X-axis moving platform 4. Specifically, the Y-axis moving platform 5 is located below the X-axis moving platform 4, and the Y-axis moving platform 5 drives the upper die storage mechanism 6 to move in the Y-axis direction. The X-axis moving platform 4 is connected to the fixed seat 1. Specifically, it is located below the fixed seat 1, and the X-axis moving platform 4 drives the Y-axis moving platform 5 to move in the X-axis direction. The riveting driving member 7 is arranged on the fixed seat 1, and the output end 71 of the riveting driving member 7 faces the upper die storage mechanism 6 and is used to drive the upper die 3 to move or perform riveting. The upper die clamping assembly 2 is connected to the output end 71 of the riveting driving member 7 and is a mechanism for clamping the upper die 3 when the upper die clamping assembly 2 works.

[0054] In this embodiment, the output end 71 of the riveting driving member 7 is provided with the upper die clamping assembly 2, and the upper die clamping assembly 2 clamps the upper die 3. Driven by the riveting driving member 7, the upper die 3 moves or performs riveting. The X-axis moving platform 4 is connected to the fixed seat 1, the Y-axis moving platform 5 is arranged on the X-axis moving platform 4, the upper die storage mechanism 6 is arranged on the Y-axis moving platform 5, and the upper die 3 is arranged on the upper die storage mechanism 6. Thus, each upper die 3 can move in the X-axis direction or the Y-axis direction under the drive of the X-axis moving platform 4 and the Y-axis moving platform 5, so as to drive the upper die 3 to move below the upper die clamping assembly 2. The riveting driving member 7 drives the upper die clamping assembly 2 to move up and down, so as to realize the unloading, loading and clamping of the upper die 3, and further realize the replacement of the upper die 3. By automatically moving and aligning the upper die 3, the processing interruption time is reduced and the production and processing efficiency is improved.

[0055] In addition, specifically, the Y-axis moving platform 5 is located below the X-axis moving platform 4, and the X-axis moving platform 4 is located below the fixed seat 1. That is, there is a height difference between the Y-axis moving platform 5, or the upper die storage mechanism 6, and the fixed seat 1, providing space for the installation and switching of the upper die 3.

[0056] In some embodiments of the upper die clamping assembly 2, such as Figure 2 , Figure 5 and Figure 6 shown, the upper die clamping assembly 2 includes an upper die base 21 and a pressure sensor 22. The pressure sensor 22 is connected to the output end 71, and the upper die base 21 is connected to the pressure sensor 22. In this embodiment, the upper die base 21 is the direct installation structure for the upper die 3 during operation. The pressure sensor 22 is located between the output end 71 and the upper die base 21, and is used to sense the pressure during riveting, facilitating the adjustment and control of the pressure.

[0057] Such as Figure 5 , Figure 6 shown, the lower end surface of the upper die base 21 is provided with an upper die sleeve 211. The upper end of the upper die 3 is movably inserted into the upper die sleeve 211. The upper die clamping assembly 2 further includes a locking collar 23. The locking collar 23 is sleeved on the upper die sleeve 211 and is used to loosen or lock the upper die 3. The upper end of the upper die 3 is movably inserted into the upper die sleeve 211, and at the same time, the upper and lower movement of the locking collar 23 is used to lock the upper die 3 to prevent the upper die 3 from falling during operation, and it is also convenient to release the upper die 3 during switching.

[0058] Specifically, the locking collar 23 is provided with an upper collar 231 extending upward along its circumferential surface. The upper collar 231 is sleeved on the lower end of the upper die base 21. There are two high-pressure air ducts connected to the high-pressure air pipeline on the upper die base 21. One of them is the locking air duct 212, and the locking air duct 212 extends to the lower end surface, specifically to the outer ring of the lower end surface. The locking air duct 212 communicates with the internal space of the locking collar 23. The other is the release air duct 213, and the release air duct 213 extends to the lower end surface, specifically to the inner ring of the lower end surface. The release air duct 213 communicates with the space inside the upper die sleeve 211. There is a locking hole 214 on the side wall of the upper die sleeve 211. The upper die clamping assembly 2 further includes a movable part 24. The movable part 24 is movably arranged in the locking hole 214, and the dimension of the movable part 24 along the axial direction of the locking hole 214 is greater than the length of the locking hole 214. There is an annular inclined surface 232 on the lower part of the inner ring surface of the locking collar 23 for abutting against the movable part 24.

[0059] When it is necessary to clamp the upper die 3, the X-axis moving platform 4 and the Y-axis moving platform 5 drive the upper die storage mechanism 6 to move, so that the upper die 3 on the upper die storage mechanism 6 is aligned with the upper die sleeve 211. The riveting driving part 7 drives the upper die clamping assembly 2 to move downward, so that the upper die sleeve 211 is sleeved on the upper end of the corresponding upper die 3. Then, the locking air passage 212 is communicated with an external high-pressure air pipeline, and high-pressure air is introduced into the locking air passage 212. The high-pressure air enters the inside of the locking collar 23, thereby pushing the locking collar 23 to move downward. The locking collar 23 abuts against the movable part 24, and the movable part 24 moves inward along the locking hole 214 until the movable part 24 tightly abuts against the upper end of the upper die 3, thereby locking the upper die 3. Of course, before the upper die sleeve 211 is sleeved on the upper end of the corresponding upper die 3, in order to prevent the locking collar 23 from sliding down, the release air passage 213 can be kept communicated with the external high-pressure air pipeline, and high-pressure air is introduced into the release air passage 213. The high-pressure air enters the space inside the upper die sleeve 211, and the air flows along the upper die sleeve 211 into the locking hole 214. The air pushes the locking hole 214 to move outward, and at the same time, the air and the movable part 24 push the locking collar 23 to move upward, so that the upper die clamping assembly 2 is in a released state.

[0060] When it is necessary to release the upper die 3, the X-axis moving platform 4 and the Y-axis moving platform 5 drive the upper die storage mechanism 6 to move, so that the idle position on the upper die storage mechanism 6 is aligned with the upper die 3. The riveting driving part 7 drives the upper die clamping assembly 2 to move downward, so that the lower end of the upper die 3 moves to the idle position of the upper die storage mechanism 6, or in other words, the lower end of the upper die 3 abuts against the idle position of the upper die storage mechanism 6. Then, the release air passage 213 is communicated with an external high-pressure air pipeline, and high-pressure air is introduced into the release air passage 213. The high-pressure air enters the space inside the upper die sleeve 211, and the air flows along the gap between the upper die 3 and the upper die sleeve 211 into the locking hole 214. The air pushes the locking hole 214 to move outward, and at the same time, the air and the movable part 24 push the locking collar 23 to move upward, so that the movable part 24 is separated from the upper end of the upper die 3, thereby releasing the upper die 3 and leaving the upper die 3 on the upper die storage mechanism 6. Then, the riveting driving part 7 drives the upper die clamping assembly 2 to move upward, thereby completing the release of the upper die 3.

[0061] Further, as Figure 5 、 Figure 6 shown, in order to maintain a good locking effect, a locking groove 31 is provided at the upper end of the upper die 3. When the upper end of the upper die 3 is inserted into the upper die sleeve 211, the locking groove 31 is directly opposite to the locking hole 214.

[0062] As Figure 6As shown, a receiving groove 215 surrounding the upper die sleeve 211 is provided on the lower end surface of the upper die base 21. The upper die clamping assembly 2 further includes an elastic member 25. The elastic member 25 is sleeved on the upper die sleeve 211. The upper end of the elastic member 25 extends into the receiving groove 215, and the lower end of the elastic member 25 abuts against the locking collar 23. By providing the receiving groove 215, the elastic member 25 can be prevented from being placed in the receiving groove to provide space for the elastic member 25.

[0063] In addition, specifically, the locking air duct 212 communicates with the receiving groove 215, and the internal space of the locking collar 23 is communicated through the receiving groove 215.

[0064] In a further embodiment of some upper die sleeves 211, a clamping groove is provided at the end of the upper die sleeve 211, that is, a clamping groove is provided at the lower end of the upper die sleeve 211, and the position of the clamping groove is lower than the position of the locking collar 23. The upper die clamping assembly 2 further includes a snap ring 26 for restricting the position of the locking collar 23. The snap ring 26 is clamped on the clamping groove. By providing the clamping groove and the snap ring 26, the locking collar 23 is prevented from moving downward excessively and detaching from the upper die base 21.

[0065] In some embodiments of the X-axis moving platform 4, such as Figure 2 、 Figure 3 As shown, the X-axis moving platform 4 includes a connecting frame 41, an X-axis guide rail 42, an X-axis driving mechanism 43, a lead screw 44, a nut 45, and an X-axis slider 46. The connecting frame 41 is connected to the fixed seat 1. Specifically, the connecting frame 41 is connected to the bottom of the fixed seat 1, and the connecting frame 41 is vertically arranged. The X-axis guide rail 42 and the lead screw 44 are arranged on the connecting frame 41. The X-axis driving mechanism 43 is connected to the lead screw 44. The nut 45 is arranged on the lead screw 44. The X-axis slider 46 is slidably arranged on the X-axis guide rail 42, and the X-axis slider 46 is connected to the nut 45. The two sides of the X-axis slider 46 extend downward and cross the connecting frame 41. The Y-axis moving platform 5 is arranged on the X-axis slider 46, specifically connected to the part of the X-axis slider 46 that extends downward and crosses the connecting frame 41.

[0066] In some embodiments of the Y-axis platform, such as Figure 3 、 Figure 4 As shown, the Y-axis moving platform 5 includes a mounting plate 51, a Y-axis guide rail 52, a Y-axis driving mechanism 53, and a Y-axis slider 54. The mounting plate 51 is connected to the X-axis moving platform 4, specifically connected to the X-axis slider 46. The Y-axis guide rail 52 is arranged on the mounting plate 51. Specifically, the Y-axis guide rail 52 is arranged at the bottom of the mounting plate 51. The Y-axis slider 54 is slidably arranged on the Y-axis guide rail 52. The Y-axis driving mechanism 53 is connected to the Y-axis slider 54, and the Y-axis driving mechanism 53 drives the Y-axis slider 54 to move in the Y-axis direction. The upper die storage mechanism 6 is arranged on the Y-axis slider 54.

[0067] Further, in order to improve the stability of the movement of the upper die storage mechanism 6, the Y-axis moving platform 5 is provided with multiple groups of Y-axis sliding fit groups, and each group of Y-axis sliding fit groups includes a Y-axis guide rail 52 and a Y-axis slider 54. The Y-axis slider 54 is slidably fitted with the Y-axis guide rail 52 of the corresponding group.

[0068] In some embodiments of the upper die storage mechanism 6, such as Figure 3 shown, the upper die storage mechanism 6 is a storage frame, and the storage frame includes multiple connecting rods. The multiple connecting rods are connected end to end. A number of upper die holes 3 for installing the upper die 3 are provided on the first connecting rod. The second connecting rod is located at a position opposite to the first connecting rod, and the second connecting rod is connected to the Y-axis slider 54. Specifically, it is located below the Y-axis slider 54 and is connected to the Y-axis slider 54.

[0069] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A riveting center upper die mechanism, characterized in that: The upper die mechanism of the riveting center includes a fixed seat, an upper die clamping assembly, a plurality of upper dies, an X-axis moving platform, a Y-axis moving platform, an upper die storage mechanism and a riveting drive component; The upper mold storage mechanism is arranged on the Y-axis moving platform; A plurality of upper molds are arranged on the upper mold storage mechanism; The Y-axis moving platform is arranged on the X-axis moving platform, and the Y-axis moving platform drives the upper mold storage mechanism to move along the Y-axis direction; The X-axis moving platform is connected to the fixed seat, and the X-axis moving platform drives the Y-axis moving platform to move along the X-axis direction; The pressure riveting driving member is arranged on the fixing seat, and the output end of the pressure riveting driving member faces the upper die storage mechanism, and is used to drive the upper die to move or pressure rivet; The upper die clamping assembly is connected to the output end of the riveting drive component and is used for clamping the upper die during operation.

2. The riveting center upper die mechanism according to claim 1, characterized in that: The upper die clamping assembly includes an upper die base and a pressure sensor, the pressure sensor is connected to the output end, and the upper die base is connected to the pressure sensor.

3. The riveting center upper die mechanism according to claim 2, characterized in that: The lower end surface of the upper die seat is provided with an upper die sleeve; The upper end of the upper die is movably inserted into the upper die sleeve; The upper die clamping assembly also includes a locking collar, which is sleeved on the upper die sleeve and is used to loosen or lock the upper die.

4. The riveting center upper die mechanism according to claim 3, characterized in that: The locking collar is provided with an upper collar extending upward along its circumferential surface, and the upper collar is sleeved on the lower end of the upper die seat; The upper die base is provided with two high-pressure air passages connected to the high-pressure air flow pipeline, one of which is a locking air passage, and the locking air passage extends to the lower end surface and communicates with the internal space of the locking collar; The other is a release air channel, which extends to the lower end surface and communicates with the space in the upper die sleeve; A locking hole is provided on the side wall of the upper die sleeve; The upper die clamping assembly further comprises a movable member, which is movably disposed in the locking hole, and the dimension of the movable member along the axial direction of the locking hole is greater than the length of the locking hole; The lower part of the inner ring surface of the locking collar is provided with an annular inclined surface for abutting against the movable part.

5. The riveting center upper die mechanism according to claim 4, characterized in that: The upper end of the upper die is provided with a locking groove, and when the upper end of the upper die is inserted into the upper die sleeve, the locking groove faces the locking hole.

6. The riveting center upper die mechanism according to claim 4 or 5, characterized in that: The lower end surface is provided with a receiving groove surrounding the upper die sleeve; The upper die clamping assembly also includes an elastic member, which is sleeved on the upper die sleeve, the upper end of the elastic member extends into the accommodating groove, and the lower end of the elastic member abuts against the locking ring.

7. The riveting center upper die mechanism according to claim 3, characterized in that: A slot is provided at the end of the upper die sleeve, and the position of the slot is lower than the position of the locking collar; The upper die clamping assembly also includes a retaining spring for limiting the position of the locking collar, and the retaining spring is clamped on the retaining groove.

8. The riveting center upper die mechanism according to claim 1, characterized in that: The X-axis mobile platform comprises a connecting frame, an X-axis guide rail, an X-axis driving mechanism, a lead screw, a nut and an X-axis slider, wherein the connecting frame is connected to the fixing seat, the X-axis guide rail and the lead screw are arranged on the connecting frame, the X-axis driving mechanism is connected to the lead screw, the nut is arranged on the lead screw, the X-axis slider is slidably arranged on the X-axis guide rail, and the X-axis slider is connected to the nut; The Y-axis moving platform is arranged on the X-axis sliding block.

9. The riveting center upper die mechanism according to claim 1, characterized in that: The Y-axis moving platform comprises a mounting plate, a Y-axis guide rail, a Y-axis driving mechanism and a Y-axis slider, wherein the mounting plate is connected to the X-axis moving platform, the Y-axis guide rail is arranged on the mounting plate, the Y-axis slider is slidably arranged on the Y-axis guide rail, the Y-axis driving mechanism is connected to the Y-axis slider, and the Y-axis driving mechanism drives the Y-axis slider to move along the Y-axis direction; The upper mold storage mechanism is arranged on the Y-axis sliding block.

10. The riveting center upper die mechanism according to claim 8, characterized in that: The upper die storage mechanism is a storage frame, and the storage frame includes a plurality of connecting rods, one of which is provided with a plurality of upper die holes for installing the upper die.

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