CN111318691A

CN111318691A - Radiation ring pressing device

Info

Publication number: CN111318691A
Application number: CN202010022545.8A
Authority: CN
Inventors: 董永安; 成问好
Original assignee: Shenzhen Ruidamei Magnetic Industry Co ltd; Taiyuan Kaiyuan Intelligent Equipment Co ltd
Current assignee: Shenzhen Ruidamei Magnetic Industry Co ltd; Taiyuan Kaiyuan Intelligent Equipment Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-06-23

Abstract

The invention provides a radiant ring pressing device which comprises a lower die punching assembly and an upper die punching assembly, wherein the lower die punching assembly is provided with a lower die punching assembly, the upper die punching assembly is provided with an upper die punching assembly, the lower die punching assembly and the upper die punching assembly can move oppositely to press a radiant ring, the lower die punching assembly and the upper die punching assembly can be driven to rotate independently, and when the radiant ring is pressed, the lower die punching assembly and the upper die punching assembly rotate synchronously. According to the radiant ring pressing device provided by the invention, the upper punch assembly and the lower punch assembly can be independently driven to synchronously rotate, so that the generation of frictional heat caused by the speed difference between the upper punch assembly and the lower punch assembly is effectively avoided, and the uniformity of the magnetic performance of the pressed radiant ring and the production efficiency and the qualified rate of pressing operation are improved.

Description

Radiation ring pressing device

Technical Field

The invention belongs to the technical field of radiation ring manufacturing appliances, and particularly relates to a radiation ring pressing device.

Background

In the prior art, a radiation ring is pressed by a radiation ring pressing device, the radiation ring pressing device is provided with an upper punch and a lower punch which are oppositely arranged, wherein a die is arranged in the lower punch, magnetic powder is put into a die cavity of the die for the relative movement of the upper punch and the lower punch to form a punching molding, in order to enable the magnetic orientation of the magnetic powder in the annular die cavity of the die to be as uniform as possible, the lower punch is designed to be in a driven form in the prior art so that the radiation ring can complete the magnetic orientation in the rotation process, and the technical scheme adopted in the prior art is that the lower punch actively rotates, the upper punch rotates along with the lower punch by virtue of the friction force contacted with the magnetic powder, namely the rotation of the upper punch is driven rotation, so that the speed difference between the upper punch and the lower punch is large at the beginning stage of the rotation operation of the lower punch, and further the friction at the position where the punch is contacted with the magnetic powder generates a large amount of heat, this makes the uniformity of magnetic performance of the pressed radiation ring low and the yield is relatively low, and the invention is provided based on the problem.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide a radial ring pressing apparatus, in which an upper punch assembly and a lower punch assembly can be driven to rotate synchronously and independently, so as to effectively avoid the generation of frictional heat caused by the speed difference between the upper punch assembly and the lower punch assembly, and improve the uniformity of magnetic performance of a pressed radial ring and the production efficiency and qualification rate of pressing operation.

In order to solve the above problems, the present invention provides a radiant ring pressing apparatus, including a lower die assembly having a lower die assembly, and an upper die assembly having an upper die assembly, wherein the lower die assembly and the upper die assembly can move in opposite directions to press a radiant ring, and the lower die assembly and the upper die assembly can be driven to rotate independently, and when pressing the radiant ring, the lower die assembly and the upper die assembly rotate synchronously.

Preferably, the radiant ring pressing device further comprises a rotary driving device, the rotary driving device is provided with a first power output piece and a second power output piece, the first power output piece is in driving connection with the lower punch assembly, and the second power output piece is in driving connection with the upper punch assembly.

Preferably, the rotary driving device further comprises a rotary motor, the power output shaft of the rotary motor is provided with the first power output piece and the second power output piece along the axial direction of the power output shaft, and the distance between the second power output piece and the first power output piece is matched with the distance between the upper die assembly and the lower die assembly.

Preferably, the first power take off comprises a first drive pulley drivingly connected by a first belt to a first drive section provided by the lower die assembly; and/or the second power output part comprises a second driving belt pulley which is in driving connection with a second driving part of the upper die assembly through a second belt.

Preferably, the radiant ring pressing apparatus further comprises a punch synchronization bracket, the upper punch assembly being fixedly mounted on the punch synchronization bracket, the punch synchronization bracket driving the second power output to move synchronously towards the first power output when the upper punch assembly is driven to move towards the lower punch assembly.

Preferably, the lower punch assembly comprises a lower punch assembly and a rotating platform, the lower punch assembly is mounted on the rotating platform, the rotating platform drives the lower punch assembly to rotate when being driven to rotate, an elastic piece is arranged between the lower punch assembly and the rotating platform, and the stretching direction of the elastic piece is located in the punching direction of the lower punch assembly.

Preferably, the lower die assembly comprises a die, the die is fixedly mounted on a first base, the rotary platform comprises a first platform body corresponding to the first base, the first base and the first platform body are arranged at an interval, and a plurality of connecting guide rods are arranged between the first base and the first platform body.

Preferably, the first platform body has a first protruding pillar extending towards one side of the first base, the elastic element is a spring, the spring is sleeved on the outer periphery of the first protruding pillar, and two axial ends of the spring are respectively abutted to the first platform body and the first base.

Preferably, the first base has a second boss extending toward one side of the first platform body, the first boss is configured with an axial hole, and the second boss is inserted into the axial hole.

Preferably, the lower die assembly further comprises a punch body, the punch body is inserted into a die cavity of the die, one axial end of the punch body is provided with a core rod, the other axial end of the punch body is provided with a core rod seat, the core rod seat is arranged in the axial hole, and a sliding guide structure is arranged between the outer peripheral wall of the core rod seat and the axial hole.

According to the radiation ring pressing device provided by the invention, the upper punch assembly and the lower punch assembly can be independently driven respectively to keep the upper punch assembly and the lower punch assembly synchronous during rotation, and a passive driving mode of an active belt between the upper punch assembly and the lower punch assembly in the prior art is not adopted, so that the phenomenon of nonuniform magnetic performance of a radiation ring caused by friction heat due to speed difference between the upper punch assembly and the lower punch assembly at the initial stage of rotation is effectively avoided, and the uniformity of magnetic performance of a pressed radiation magnetic ring and the production efficiency and the qualified rate of pressing operation are improved.

Drawings

Fig. 1 is a schematic perspective view of a radiant ring pressing device according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic view of a portion of the enlarged structure at A in FIG. 2;

FIG. 4 is a schematic perspective view of the rotary drive apparatus shown in FIG. 1;

FIG. 5 is a schematic view of a portion of the enlarged structure at B in FIG. 4;

FIG. 6 is a partial schematic view of the front view of FIG. 4

FIG. 7 is a schematic perspective view of the lower punch assembly of FIG. 1;

FIG. 8 is a front view of FIG. 7;

fig. 9 is a schematic cross-sectional view of C-C in fig. 8.

The reference numerals are represented as:

11. a mold; 12. a first base; 121. a second convex column; 13. a punch body; 131. a core bar; 132. a mandrel holder; 133. a sliding guide structure; 14. a push rod; 141. an accommodation hole; 2. rotating the platform; 21. a first platform body; 211. a first convex column; 212. a drive section; 213. supporting the rotating shaft; 214. a thrust bearing; 215. a roller bearing; 3. an elastic member; 4. connecting a guide rod; 5. a fixed base; 51. a mounting cavity; 100. a lower punch assembly; 101. a lower die assembly; 102. a first driving section; 200. a first reciprocating drive; 300. an upper punch assembly; 301. an upper punch assembly; 302. a second driving section; 400. a frame; 500. a magnetic field orientation device; 600. a rotation driving device; 601. a first power take-off; 602. a second power take off; 6021. a synchronous thrust bearing; 6022. a shifting fork; 603. a rotating electric machine; 604. a power take-off shaft; 6041. a first chute; 701. a first belt; 702. a second belt; 703. punching a synchronous bracket; 704. a first bearing housing; 705. a second bearing housing; 706. a tensioning device; 707. a second reciprocating drive means.

Detailed Description

Referring to fig. 1 to 9 in combination, according to an embodiment of the present invention, there is provided a radiant ring pressing apparatus, including a lower die assembly 100 and an upper die assembly 300, where the lower die assembly 100 has a lower die assembly 101, the upper die assembly 300 has an upper die assembly 301, the lower die assembly 101 and the upper die assembly 301 can move towards each other to press a radiant ring, and the lower die assembly 101 and the upper die assembly 301 can be driven to rotate independently, respectively, and when pressing a radiant ring, the lower die assembly 101 and the upper die assembly 301 rotate synchronously, the lower die assembly 100 and the upper die assembly 300 are fixedly connected to a frame 400 independently, and when performing a radiant ring pressing operation, the upper die assembly 300 is controlled to move towards the lower die assembly 100, so as to clamp and press magnetic powder in a die cavity; at the same time, the radiation ring pressing device further comprises a magnetic field orientation device 500, which is just as appropriate in the prior art, and is arranged on the circumferential outer side of the mold, and forms the magnetic field orientation during the rotation of the radiation ring. In the technical scheme, the upper punch assembly 301 and the lower punch assembly 101 can be independently driven respectively to keep the upper punch assembly and the lower punch assembly synchronous during rotation, and a driving mode with a passive driving mode between the upper punch assembly and the lower punch assembly in the prior art is not adopted, so that the phenomenon that the magnetic performance of a radiation ring is uneven due to friction heat caused by the speed difference between the upper punch assembly and the lower punch assembly at the initial stage of rotation is effectively avoided, and the uniformity of the magnetic performance of the pressed radiation ring and the production efficiency and the qualification rate of pressing operation are improved.

As an alternative embodiment, for example, the lower die assembly 100 and the upper die assembly 300 are respectively provided with corresponding rotary driving components, such as rotary motors, but it can be understood that this way will undoubtedly increase the production and manufacturing costs of the radiant ring pressing device, therefore, preferably, the radiant ring pressing device further comprises a rotary driving device 600, the rotary driving device 600 is provided with a first power output 601 and a second power output 602, the first power output 601 is in driving connection with the lower die assembly 101, the second power output 602 is in driving connection with the upper die assembly 301, in this technical scheme, the two power outputs in one set of rotary driving device 600, namely the first power output 601 and the second power output 602, can realize the independent driving of the upper die assembly 301 and the lower die assembly 101, the structure of the radiant ring pressing device can be optimized clearly, and the production and manufacturing cost can be reduced.

The rotary driving device 600 further includes a rotary motor 603, the first power output element 601 and the second power output element 602 are respectively disposed on the power output shaft 604 of the rotary motor 603 along the axial direction thereof, and the distance between the second power output element 602 and the first power output element 601 is matched with the distance between the upper die assembly 301 and the lower die assembly 101, it can be understood that the power output shaft 604 may be directly and coaxially connected to the rotating shaft of the rotary motor 603 through a corresponding coupling, or may be indirectly connected to the rotating shaft of the rotary motor 603 through a corresponding speed reduction mechanism. The aforementioned matching of the distance between the second power output 602 and the first power output 601 to the distance between the upper die assembly 301 and the lower die assembly 101 means that the second power output 602 can transmit the angular displacement of the rotating motor 603 to the upper die assembly 301 for rotation while forming radial ring pressing toward the side close to the lower die assembly 101 along with the upper die assembly 301.

Preferably, the first power output member 601 includes a first driving pulley, and the first driving pulley is connected to the first driving portion 102 (for example, a pulley structure) of the lower die assembly 101 via a first belt 701; and/or the second power output member 602 includes a second driving pulley, and the second driving pulley is in driving connection with the second driving portion 302 (for example, the second driving pulley may also be in a pulley structure) of the upper die assembly 301 through a second belt 702, and driving the lower die assembly 101 and the upper die assembly 301 separately by using the first belt 701 and the second belt 702 may make the power transmission chain design simpler.

In order to ensure the synchronization of the punching process of the upper die assembly 301 and the second power output part 602, it is preferable that the radiant ring pressing apparatus further includes a punching synchronization bracket 703, the upper die assembly 301 is fixedly mounted on the punching synchronization bracket 703, and when the upper die assembly 301 is driven to move toward the lower die assembly 101, the punching synchronization bracket 703 drives the second power output part 602 to move toward the first power output part 601 synchronously.

As a specific implementation manner of the combined rotation and sliding motion (in the stamping direction) of the second power output member 602, it is preferable that the power output shaft 604 has a first sliding slot 6041 extending along the axial direction thereof, the second power output member 602 is sleeved on the power output shaft 604, the second power output member 602 has a second sliding slot extending along the axial direction thereof, and the first sliding slot 6041 and the second sliding slot are connected by a key (not shown in the figure), where the key plays a role in exerting force in the axial direction of the power output shaft 604 and plays a role in sliding guidance in the axial direction of the power output shaft 604.

The power output shaft 604 is further sleeved with a first bearing seat 704, and the first bearing seat 704 is further connected with the punching synchronization bracket 703, that is, when the punching synchronization bracket 703 is driven by a second reciprocating driving device 707 (for example, a cylinder or an oil cylinder, which has a driving end connected with a base of the upper punching assembly 300) to move close to or away from the lower punching assembly 101, the first bearing seat 704 slides on the outer peripheral wall of the power output shaft 604 synchronously, so that the smoothness of sliding can be ensured.

Furthermore, the two axial ends of the second power output member 602 are respectively provided with a synchronous thrust bearing 6021, the synchronous thrust bearings 6021 are sleeved on the power output shaft 604, the power output member further comprises a shifting fork 6022, the shifting fork 6022 is respectively positioned on one side of the synchronous thrust bearing 6021 far away from the second power output member 602 so as to clamp the second power output member 602, and the shifting fork 6022 is further connected with the stamping synchronous bracket 703. Furthermore, a second bearing seat 705 is further arranged at the free end of the power output shaft 604, and the second bearing seat 705 is sleeved on the power output shaft 604.

The radiant ring pressing device further comprises a tensioning device 706, wherein the tensioning device 706 is used for adjusting the tensioning force of the first belt 701 and/or the second belt 702, specifically, for the second belt 702 corresponding to the upper die assembly 301, the tensioning device 706 is fixed with the punching synchronous bracket 703 as a whole, and for the first belt 701 corresponding to the lower die assembly 101, the tensioning device 706 is fixed with the frame 400 as a whole. The tensioning device 706 may be, for example, a tensioning wheel of the prior art.

The lower die punching assembly 100 comprises a lower die assembly 101 and a rotating platform 2, the lower die assembly 101 is arranged on the rotating platform 2, when the rotating platform 2 is driven to rotate, the lower die assembly 101 is driven to rotate, an elastic piece 3 is arranged between the lower die assembly 101 and the rotating platform 2, and the stretching direction of the elastic piece 3 is located in the punching direction of the lower die assembly 101. In the technical scheme, the lower punch assembly 101 and the rotary platform 2 are arranged between the elastic piece 3, so that the lower punch assembly 101 can drive the elastic piece 3 to float and stretch in the stamping direction in the process of stamping and pressing the radiation ring, thereby realizing the floating pressing of the radiation ring and effectively improving the uniformity of the radiation ring.

Further, the lower die assembly 101 includes a die 11, and it can be understood that the die 11 has a die cavity for pressing the radial ring, the die 11 is fixedly mounted on a first base 12, the rotary platform 2 includes a first platform body 21 corresponding to the first base 12, the first base 12 and the first platform body 21 are arranged at an interval, and a plurality of connecting guide rods 4 are arranged between the first platform body 21 and the first base 12, in this technical solution, a plurality of connecting guide rods 4 are arranged between the first platform body 21 and the first base 12, so that accuracy and smoothness of the lower die assembly 101 in the expansion and contraction direction of the elastic member 3 during the floating pressing process can be achieved. Furthermore, the first platform body 21 has a first protruding column 211 extending towards one side of the first base 12, the elastic element 3 is a spring, the spring is sleeved on the outer periphery of the first protruding column 211, and two axial ends of the spring are respectively abutted against the first platform body 21 and the first base 12, at this time, the spring is sleeved on the outer periphery of the first protruding column 211, so that the stability of the spring in the expansion direction can be further ensured, and the die 11 is prevented from deviating from the stamping direction in the process of pressing the radiation ring.

Preferably, the first base 12 is provided with a second boss 121 extending towards one side of the first platform body 21, the first boss 211 is provided with an axial hole, and at this time, the second boss 121 is inserted into the axial hole, so that the floating stability and reliability of the lower die assembly 101 can be ensured by the first boss 211 and the second boss 121 which are inserted in a matching manner, and more importantly, at this time, both the axial hole on the first boss 211 and the second boss 121 also constitute a limiting mechanism of the compression stroke of the spring, thereby preventing the problem of insufficient punching force caused by the excessively large downward moving distance of the lower die assembly 101, and simultaneously forming a downward stop limit of the first base 12.

Preferably, the die assembly further comprises a fixed base 5 for supporting the lower die assembly 101 and the rotary platform 2 on an external platform such as a workbench, the fixed base 5 has a mounting cavity 51, and the first platform body 21 is pivotally connected to the mounting cavity 51. Further, the first platform body 21 has a supporting rotation shaft 213 extending toward the side of the fixed base 5, and it is understood that the supporting rotation shaft 213 is preferably detachably assembled to the side of the first platform body 21, and the supporting rotation shaft 213 is inserted into the mounting cavity 51 to ensure the pivotal connection between the rotating platform 2 and the fixed base 5. Specifically, for example, the supporting rotating shaft 213 has a first shaft section, a second shaft section, and a third shaft section sequentially arranged along the axial direction thereof, the diameters of the first shaft section and the third shaft section are smaller than the diameters of the second shaft section, that is, shaft shoulders are formed at two axial sides of the second shaft section, and the first shaft section and the third shaft section are respectively sleeved with a thrust bearing 214, so that the supporting rotating shaft 213 is axially positioned in the mounting cavity 51, that is, the supporting rotating shaft 213 can be prevented from moving in the axial direction at this time, and the lower die assembly 101 is prevented from moving in the axial direction when an axial punching force is applied to the lower die assembly 101. Further, a roller bearing 215 is further sleeved on the first shaft section and/or the third shaft section, so that the supporting rotating shaft 213 is radially positioned in the mounting cavity 51.

The lower die assembly 101 further includes a punch body 13, the punch body 13 is inserted into a die cavity of the die 11, one axial end of the punch body 13 has a core rod 131, the other end has a core rod seat 132, the core rod seat 132 is installed in the axial hole, a sliding guide structure 133 is provided between the outer peripheral wall of the core rod seat 132 and the axial hole, the punch body 13 is a part for applying pressure to the pressing side of the radiation ring, and the core rod 131 functions to form an inner ring die of the radiation ring, as the prior art, no special protection is provided in the present application, but in the technical scheme, the centering effect of the core rod seat 132 is ensured through the sliding guide structure 133 provided between the outer peripheral wall of the core rod seat 132 and the axial hole, and the precision of the shape and position size of the radiation ring can be ensured. For example, the sliding guide structure 133 may be a sliding sheet symmetrically disposed on the outer peripheral side of the core rod holder 132, and it can be understood that the outer peripheral wall of the core rod holder 132 has a first groove extending along the axial direction thereof, the inner wall of the corresponding axial hole has a second groove correspondingly, and two opposite sides of the sliding sheet are respectively disposed in the first groove and the second groove.

Preferably, the lower die assembly 101 further includes a push rod 14, an axial end of the push rod 14 is provided with a receiving hole 141, an end of the core rod seat 132 away from the core rod 131 is installed in the receiving hole 141, and a gap is provided between an end of the core rod seat 132 away from the core rod 131 and the receiving hole 141, at this time, since a gap is provided between an end of the core rod seat 132 away from the core rod 131 and the receiving hole 141, when the lower die assembly 101 rotates following the rotary platform 2, the push rod 14 does not rotate along with it, the design of this structure facilitates the installation of the push rod 14 and an external fixing component, and the receiving hole 141 may be, for example, an inverted T-shaped groove penetrating through an end of the push rod in a radial direction of the push rod 14.

As a specific driving embodiment of the rotating motion of the rotating platform 2, it is preferable to provide a driving portion 212 on the outer periphery of the first platform body 21, the driving portion 212 is used for driving connection with a driving device, specifically, for example, the driving portion 212 adopts a corresponding structure of a pulley conventionally adopted, so as to drive the rotating platform 2 to rotate by means of belt transmission, and further drive the lower die assembly 101 to rotate therewith; for another example, the driving portion 212 is a conventional external gear ring structure, and drives the rotation of the rotary platform 2 through a gear mesh transmission manner, so as to drive the lower die assembly 101 to rotate therewith.

Further, when the punch assembly includes the push rod 14, the radiation ring pressing device further includes a first reciprocating driving device 200, and a driving rod of the first reciprocating driving device 200 is connected to one end of the push rod 14 away from the receiving hole 141, specifically, for example, the first reciprocating driving device 200 may include an air cylinder or an oil cylinder, and a free end of a piston rod of the air cylinder or the oil cylinder is connected to the push rod 14, and after the radiation ring is pressed, the driving rod may be controlled to extend out, for example, according to an orientation shown in fig. 4, at this time, the driving rod of the first reciprocating driving device 200 extends upwards to push the push rod 14 to move upwards synchronously, and further push the punch body 13 and the core rod 131 to move upwards together, so that the pressed radiation ring can be pushed out from the upper opening of the die 11, and thus completing the demolding of the radiation ring. It is emphasized that the first reciprocating drive 200 is provided in this embodiment only for the purpose of de-molding after the pressing of the radial ring is completed, and it is no longer necessary to perform the pressing action on the radial ring as in the corresponding device in the prior art.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a radiant ring suppression device, characterized by, includes lower punching subassembly (100), goes up punching subassembly (300), lower punching subassembly (100) have lower punching subassembly (101), go up punching subassembly (300) have upper punching subassembly (301), lower punching subassembly (101) and upper punching subassembly (301) can move in opposite directions in order to press the radiant ring, and lower punching subassembly (101) and upper punching subassembly (301) can be driven respectively and independently and rotate, and when pressing the radiant ring, lower punching subassembly (101) and upper punching subassembly (301) synchronous revolution.

2. A press arrangement according to claim 1, further comprising a rotary drive arrangement (600), the rotary drive arrangement (600) having a first power take off (601) and a second power take off (602), the first power take off (601) being in driving connection with the lower die assembly (101) and the second power take off (602) being in driving connection with the upper die assembly (301).

3. A pressing apparatus according to claim 2, wherein the rotary drive apparatus (600) further comprises a rotary motor (603), a power output shaft (604) of the rotary motor (603) is provided with the first power output member (601) and a second power output member (602) along an axial direction thereof, and a distance between the second power output member (602) and the first power output member (601) is matched with a distance between the upper die assembly (301) and the lower die assembly (101).

4. A pressing arrangement according to claim 3, wherein the first power take-off (601) comprises a first drive pulley in driving connection with a first drive (102) of the lower die assembly (101) via a first belt (701); and/or the second power output member (602) comprises a second driving belt pulley, and the second driving belt pulley is in driving connection with a second driving part (302) of the upper die assembly (301) through a second belt (702).

5. A pressing arrangement according to claim 3, further comprising a punch synchronization bracket (703), the upper die assembly (301) being fixedly mounted on the punch synchronization bracket (703), the punch synchronization bracket (703) bringing the second power output (602) to synchronize movement towards the first power output (601) when the upper die assembly (301) is driven towards the lower die assembly (101).

6. A pressing arrangement according to any one of claims 1 to 5, characterised in that the lower punch assembly (100) comprises a lower punch assembly (101), a rotary platform (2), the lower punch assembly (101) being mounted on the rotary platform (2) and driving the lower punch assembly (101) to rotate when the rotary platform (2) is driven to rotate, an elastic element (3) being arranged between the lower punch assembly (101) and the rotary platform (2), the elastic element (3) having a telescoping direction in the pressing direction of the lower punch assembly (101).

7. A pressing arrangement according to claim 6, wherein the lower die assembly (101) comprises a die (11), the die (11) being fixedly mounted on a first base (12), the rotary platform (2) comprising a first platform body (21) corresponding to the first base (12), the first base (12) being spaced apart from the first platform body (21) with a plurality of connecting guide rods (4) therebetween.

8. The pressing device according to claim 7, wherein the first platform body (21) has a first boss (211) extending toward one side of the first base (12), and the elastic member (3) is a spring fitted around an outer peripheral side of the first boss (211) and having both axial ends abutting against the first platform body (21) and the first base (12), respectively.

9. A pressing device according to claim 8, wherein said first seat (12) has a second stud (121) extending towards one side of said first platform (21), said first stud (211) being configured with an axial hole in which said second stud (121) is inserted.

10. A pressing apparatus according to claim 9, wherein the lower die assembly (101) further comprises a punch body (13), the punch body (13) is inserted into a die cavity of the die (11), the punch body (13) has a core rod (131) at one axial end thereof and a core rod seat (132) at the other axial end thereof, the core rod seat (132) is installed in the axial hole, and a sliding guide structure (133) is provided between an outer peripheral wall of the core rod seat (132) and the axial hole.