Stamping and riveting mechanism

Abstract

The utility model provides a stamping riveting mechanism which comprises a first stamping assembly and a second stamping assembly. The first stamping assembly comprises a first stamping base, a punch, a discharging plate, a plurality of movable parts, a plurality of guide columns and a feeding device. The second stamping assembly comprises a second stamping base and a riveting base. The feeding device comprises a base, a plurality of swing pieces, a plurality of elastic pieces, a plurality of positioning pieces, a plurality of steel balls and a feeding seat; each swing piece is assembled with one elastic piece, each positioning piece is assembled with one steel ball, and the swing pieces are arranged on the periphery of the first penetrating part of the base. When the steel ball is in the release position, the positioning piece extends into the first penetrating part to support a first object arranged in the base; when the punch passes through the steel balls and pushes the steel balls outwards, the positioning pieces retreat from the first penetrating part, and the first object falls on the top of a second object arranged on the second punching assembly.

Description

Technical Field

[0001] The utility model relates to an automatic riveting mechanism in a metal stamping die, and in particular to a stamping riveting mechanism which integrates a first object riveting mechanism into a stamping die, and can achieve mutual riveting of the first object and the second object during the stamping process. Background Art

[0002] Conventional riveting methods can be roughly divided into two types: one using riveting equipment and the other using stamping equipment. The following uses the example of riveting a nut to a plate to illustrate the shortcomings of the above two conventional methods, but the objects that can be riveted are not limited to nuts and plates.

[0003] Riveting equipment has strict requirements for sheet thickness and is not suitable for thinner materials. Increasing sheet thickness to accommodate the riveted surface significantly increases production costs. Furthermore, varying sheet thicknesses necessitates different structural parameters for the rivet nut, which not only requires time-consuming setup but also increases production management and quality control costs.

[0004] The process of press riveting with stamping equipment includes: positioning the die, inserting the nut, placing the sheet metal, pressing the rivets together, and finally completing the finished product. The drawback of stamping equipment is the cumbersome process. Manually inserting the nut and sheet metal is not only slow but also prone to missed placements, resulting in defective products and low production efficiency.

[0005] Therefore, how to develop a "stamping and riveting mechanism" that can achieve the goal of riveting the first object and the second object together during the stamping process, with a simple and fast workflow, stable quality, and reduced production costs, is an urgent issue to be solved by technical personnel in related fields. Utility Model Content

[0006] The purpose of the present utility model is to provide a stamping riveting mechanism for riveting a first object and a second object to each other. By integrating the first object riveting mechanism into a stamping die, the first object and the second object can be riveted to each other during the stamping process, thereby reducing the transportation work between semi-finished products, and also reducing the investment in personnel and equipment, thereby reducing production costs.

[0007] The utility model provides a stamping riveting mechanism, which includes a first stamping assembly and a second stamping assembly arranged vertically parallel to a first direction. The first stamping assembly is arranged above the second stamping assembly. The first stamping assembly can move relative to the second stamping assembly parallel to the first direction. The first stamping assembly is provided with a first object, and the second stamping assembly is provided with a second object. The utility model is characterized in that:

[0008] The first punching assembly includes a first punching seat, a punch, a stripper plate, a plurality of movable parts, a plurality of guide pins and a feeding device, wherein:

[0009] The punch has a first top end and a first bottom end opposite to each other, the first top end is disposed on the first punching seat, and the first bottom end is parallel to the first direction and faces the second punching assembly;

[0010] The stripper plate is arranged below the first punching seat;

[0011] The movable member has a second top end and a second bottom end opposite to each other. The movable member is movably disposed in parallel with the first direction and penetrates the first punching seat. The second bottom end is connected to the stripper plate, thereby enabling the first punching seat to move relative to the stripper plate in parallel with the first direction.

[0012] Each of the guide posts has a third top end and a third bottom end opposite to each other, the third top end is disposed on the first punching seat, and the third bottom end faces the second punching assembly. Each of the guide posts is movably disposed through the stripper plate parallel to the first direction.

[0013] The feeding device includes a base, a plurality of pendulums, a plurality of elastic members, a plurality of positioning members, a plurality of steel balls and a feeding seat, wherein:

[0014] The base is disposed on the stripper plate, and has a first through portion that penetrates the base in parallel with the first direction. The first bottom end of the punch extends into the first through portion in parallel with the first direction and moves in the first through portion in parallel with the first direction.

[0015] Each of the swing elements is pivotally mounted on the base via a pivot axis. The swing element has a first swing arm and a second swing arm symmetrically relative to the pivot axis, with the first swing arm located above the second swing arm.

[0016] The elastic direction of each elastic member is parallel to a second direction, and opposite ends of each elastic member parallel to the elastic direction respectively abut against the first swing arm and the base, and the second direction is perpendicular to the first direction;

[0017] Each positioning member has a first end and a second end opposite to each other parallel to the second direction, the first end can extend into or exit the first through portion, and the second end is connected to the second swing arm;

[0018] Each of the steel balls is disposed in the base and is located between the pivot shaft and the positioning member. Each of the steel balls is movable between a release position and a push position. When each of the steel balls is in the release position, a portion of each of the steel balls protrudes from the first penetration portion. When each of the steel balls is in the push position, each of the steel balls exits the first penetration portion.

[0019] The feed seat is disposed at the bottom of the base, and has a second through portion. The second through portion penetrates the feed seat in parallel with the first direction. The first through portion and the second through portion can allow the first object to pass through.

[0020] When the steel balls are in the release position, the elastic members push the first swing arms outward, and the second swing arms drive the first ends of the positioning members to extend into the first through-holes, thereby holding the first object in a suspended state by the first ends of the positioning members. When the punch passes through the steel balls, it pushes the steel balls outward, and the steel balls push the second swing arms to swing and make the first ends of the positioning members exit the first through-holes. The first swing arms compress the elastic members, and the first object falls from the first through-holes into the second through-holes and then falls on top of the second object.

[0021] The second stamping assembly includes a second stamping seat and a riveting seat, wherein:

[0022] The second punching seat has a third through portion and a plurality of guide holes. The third through portion penetrates the second punching seat parallel to the first direction. The axial length of each guide hole is parallel to the first direction. When each guide post moves parallel to the first direction, it can enter or exit the corresponding guide hole and can move within the guide hole parallel to the first direction. The second punching seat is respectively provided with a boss on two opposite sides parallel to the second direction, and a recess is formed between the two bosses.

[0023] The rivet seat is arranged in the recess of the second punching seat, and the rivet seat has a fourth penetration portion, which penetrates the rivet seat parallel to the first direction. The third penetration portion and the fourth penetration portion allow sheared material generated after the first object and the second object are punched and riveted to pass through.

[0024] In a preferred embodiment, each ornament is assembled with an elastic member, a positioning member and a steel ball, and is symmetrically arranged on the periphery of the first through portion.

[0025] In a preferred embodiment, the projection range of the first through portion of the base falls within the projection range of the second through portion of the feed seat.

[0026] In a preferred embodiment, the feeding device further comprises:

[0027] a first detection element disposed in the second through-hole to detect whether there is a first object in the second through-hole; and

[0028] A second detection element is disposed in the first penetrating portion to detect whether there is a first object in the first penetrating portion.

[0029] In a preferred embodiment, the projection range of the third penetrating portion falls within the projection range of the fourth penetrating portion, and the projection range of the fourth penetrating portion is equal to or greater than the projection range of the third penetrating portion.

[0030] In a preferred embodiment, the projection ranges of the first through portion and the second through portion cover the projection range of the third through portion, and the projection ranges of the first through portion and the second through portion are larger than the projection range of the third through portion.

[0031] The punching and riveting mechanism provided by the present invention can directly make the first object and the second object ideally engage and rivet together by punching without using additional riveting equipment. The manufacturing process is simple, fast and of stable quality, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of an embodiment of the present utility model.

[0033] Figure 2 and Figure 3 It is an enlarged structural schematic diagram of the feeding device of the present utility model.

[0034] Figures 4 to 7 It is a schematic diagram of the continuous action of punching and riveting the first object and the second object of the present invention.

[0035] Figure 8 This is a structural diagram of the first object and the second object before being stamped and riveted together.

[0036] Figure 9 The diagram is a structural diagram of a first object and a second object being punched and riveted together to produce a sheared material.

[0037] Figure 10 This is a schematic structural diagram of an embodiment of the present invention in which the first object and the second object are arranged.

[0038] Explanation of Reference Numerals: 100 - stamping and riveting mechanism; 10 - first stamping assembly; 11 - first stamping seat; 12 - punch; 121 - first top end; 122 - first bottom end; 13 - stripper plate; 14 - movable member; 141 - second top end; 142 - second bottom end; 15 - guide post; 151 - third top end; 152 - third bottom end; 16 - feeding device; 161 - base; 1611 - first penetration portion; 162 - swing member; 163 - elastic member; 1621 - first swing arm; 1622 - second swing arm; 1623 - pivot shaft; 164 - positioning member; 1641 - first end; 1642-second end; 165-steel ball; 166-feeding seat; 1661-second through-portion; 1662-convex portion; 167-first detection element; 168-second detection element; 20-second stamping assembly; 21-second stamping seat; 211-third through-portion; 212-guide hole; 213-boss; 214-recess; 215-bottom protrusion; 216-side protrusion; 22-riveting seat; 221-fourth through-portion; 91, 91A~91E-first object; 92-second object; 921-shearing material; C-axis; F1-first direction; F2-second direction. DETAILED DESCRIPTION

[0039] See also Figure 1 As shown, the present invention provides a stamping riveting mechanism 100 , which includes a first stamping assembly 10 and a second stamping assembly 20 .

[0040] The first stamping assembly 10 and the second stamping assembly 20 are arranged vertically parallel to a first direction F1, with the first stamping assembly 10 disposed above the second stamping assembly 20. The first stamping assembly 10 is movable relative to the second stamping assembly 20 parallel to the first direction F1.

[0041] The first stamping assembly 10 is used to set the first object 91, and the second stamping assembly 20 is used to set the second object 92. By stamping the first stamping assembly 10 and the second stamping assembly 20 against each other, the first object 91 and the second object 92 are riveted together to form a finished product.

[0042] The shapes of the first object 91 and the second object 92 are determined according to actual needs and can be any die stamping parts that can be riveted to each other. For example, the first object 91 can be a nut and the second object 92 can be a plate. Typically, the first object 91 and the second object 92 are made of metal.

[0043] The first stamping assembly 10 includes a first stamping base 11, a punch 12, a stripper plate 13, a plurality of movable parts 14, a plurality of guide pins 15, and a feeder 16. Typically, the stamping base 11, the punch 12, the stripper plate 13, the plurality of movable parts 14, the plurality of guide pins 15, and the feeder 16 are made of metal, such as steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloy, low-melting-point alloy, aluminum bronze, or polymer materials.

[0044] The punch 12 has a first top end 121 and a first bottom end 122 opposite to each other. The first top end 121 is disposed on the first punching seat 11 , and the first bottom end 122 is parallel to the first direction F1 and faces the second punching assembly 20 .

[0045] The stripper plate 13 is disposed below the first punching seat 11 .

[0046] The movable member 14 has a second top end 141 and a second bottom end 142 that oppose each other. The movable member 14 is movably disposed through the first punching base 11 parallel to the first direction F1. The second bottom end 142 is connected to the stripper plate 13. This allows the first punching base 11 to move relative to the stripper plate 13 parallel to the first direction F1.

[0047] The second bottom end 142 and the stripper plate 13 may be screwed together, for example, or the stripper plate 13 may be fixed to the second bottom end 142 by welding or other methods.

[0048] The guide post 15 has a third top end 151 and a third bottom end 152 opposite to each other. The third top end 151 is disposed on the first punching seat 11, and the third bottom end 152 faces the second punching assembly 20. The guide post 15 is movably disposed through the stripper plate 13 parallel to the first direction F1.

[0049] See also Figure 2 and Figure 3 As shown, the feeding device 16 includes a base 161, a plurality of pendulums 162, a plurality of elastic members 163, a plurality of positioning members 164, a plurality of steel balls 165, a feeding seat 166, a first detection element 167 and a second detection element 168.

[0050] The base 161 is disposed coaxially with the punch 12 and is mounted on the stripper plate 13. The base 161 has a first through-portion 1611 extending parallel to the first direction F1. The first bottom end 122 of the punch 12 can extend into the first through-portion 1611 and move within the first through-portion 1611 parallel to the first direction F1.

[0051] Each ornament 162 is assembled with an elastic member 163, a positioning member 164 and a steel ball 165. The number of ornaments 162, elastic members 163, positioning members 164 and steel balls 165 is not limited, but it is preferred that they can be symmetrically arranged around the periphery of the first through portion 1611. Figure 1 and Figure 2 As shown, they are symmetrically arranged on both sides of the first through portion 1611 .

[0052] The swing member 162 is pivoted on the base 161 via a pivot axis 1623 . The swing member 162 has a first swing arm 1621 and a second swing arm 1622 symmetrically relative to the pivot axis 1623 . The first swing arm 1621 is located above the second swing arm 1622 .

[0053] The elastic member 163 is disposed in the base 161. The elastic direction of the elastic member 163 is parallel to a second direction F2. The opposite ends of the elastic member 163 parallel to the elastic direction respectively abut against the first swing arm 1621 and the base 161. The second direction F2 is perpendicular to the first direction F1.

[0054] The positioning member 164 is disposed in the base 161 and has a first end 1641 and a second end 1642 opposite to each other parallel to the second direction F2. The first end 1641 can extend into or out of the first through portion 1611, and the second end 1642 is connected to the second swing arm 1622.

[0055] The steel ball 165 is disposed in the base 161 and is located between the pivot shaft 1623 and the positioning member 164. The steel ball 165 can move between a release position and a push position. Figure 2 The figure shows the released position, where a portion of the steel ball 165 protrudes from the first through portion 1611 . Figure 3 The figure shows the pushed position, where the steel ball 165 exits the first through portion 1611 .

[0056] See also Figure 2 As shown, when the punch 12 is not in contact with the steel ball 165 , the steel ball 165 is in the released position. The elastic force of the elastic member 163 pushes the first swing arm 1621 outward, and the second swing arm 1622 drives the first end 1641 of the positioning member 164 to extend into the first through portion 1611 .

[0057] See also Figure 3 As shown, when the punch 12 moves downwardly parallel to the first direction F1 and contacts the steel balls 165, each steel ball 165 is pushed outward to a pushing position, causing the steel balls 165 to exit the first through-hole 1611. The steel balls 165 push the second swing arm 1622 to swing, causing the first end 1641 of the positioning member 164 to exit the first through-hole 1611. The first swing arm 1621 then compresses the elastic member 163.

[0058] The feed seat 166 is disposed at the bottom of the base 161 and has a second through portion 1661 extending parallel to the first direction F1 and extending through the feed seat 166. A protrusion 1662 is formed at the bottom of the feed seat 166.

[0059] The projection range of the first through portion 1611 of the base 161 falls within the projection range of the second through portion 1661 of the feed seat 166 , and preferably, the projection range of the first through portion 1611 is equal to the projection range of the second through portion 1661 .

[0060] The first detecting element 167 is disposed in the second through portion 1661 to detect whether the first object 91 is in the second through portion 1661 .

[0061] The second detecting element 168 is disposed in the first through portion 1611 for detecting whether the first object 91 is positioned.

[0062] When the first detection element 167 detects the first object 91 in the second through portion 1661 , or when the second detection element 168 detects the first object 91 in the first through portion 1611 , a signal is sent to a servo system (not shown) to control the stamping and riveting mechanism to continue subsequent work.

[0063] See also Figure 1 As shown, the second stamping assembly 20 includes a second stamping seat 21 and a riveting seat 22. Generally, the second stamping seat 21 and the riveting seat 22 are made of metal materials, such as steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloy, low melting point alloy, aluminum bronze, and polymer materials.

[0064] The second punching seat 21 has a third through portion 211 and a plurality of guide holes 212 . The third through portion 211 passes through the second punching seat 21 in parallel with the first direction F1 .

[0065] The second punching seat 21 is provided with a boss 213 on opposite sides parallel to the second direction F2, forming a recess 214 between the two bosses 213. The recess 214 is provided with two bottom protrusions 215 and a side protrusion 216. The bottom protrusions 215 are located outside opposite sides of the rivet seat 22, while the side protrusion 216 is located outside one side of the rivet seat 22.

[0066] The riveting seat 22 is disposed in the recess 214 of the second punching seat 21. The riveting seat 22 has a fourth through portion 221. The fourth through portion 221 penetrates the riveting seat 22 parallel to the first direction F1.

[0067] Figure 1The top of the rivet seat 22 is shown to protrude from the recess 214 , and the top of the rivet seat 22 is roughly the same height as the top of the protrusion 215 , thereby providing the second object 92 to be firmly set on the top of the rivet seat 22 , and the side of the second object 92 leans against the side of the side protrusion 216 .

[0068] The projection range of the third through-portion 211 falls within the projection range of the fourth through-portion 221 , and the projection range of the fourth through-portion 221 is equal to or greater than the projection range of the third through-portion 211 .

[0069] The projection ranges of the first through portion 1611 and the second through portion 1661 cover the projection range of the third through portion 211 , and the projection ranges of the first through portion 1611 and the second through portion 1661 are larger than the projection range of the third through portion 211 .

[0070] The axial length of the guide hole 212 is parallel to the first direction F1. When each guide post 15 moves parallel to the first direction F1, it can enter or exit the corresponding guide hole 212 and can move within the guide hole 212 parallel to the first direction F1.

[0071] See also Figures 4 to 7 , which illustrates the working principle of the punch riveting method of the present invention for the first object 91 and the second object 92 .

[0072] See also Figure 4 As shown, the first object 91 has been fed into the feeding device 16 and the second object 92 has been placed on top of the riveting seat 22 .

[0073] At this time, the steel ball 165 is in the released position. The elastic force of the elastic member 163 pushes the first swing arm 1621 outward, and the second swing arm 1622 drives the first end 1641 of the positioning member 164 to extend into the first through portion 1611. The first end 1641 of the positioning member 164 supports the first object 91 in a suspended state.

[0074] As mentioned above, the shapes of the first object 91 and the second object 92 depend on actual needs and can be any die stamping parts that can be riveted to each other. The first object 91 is not limited to being a nut and the second object 92 is not limited to being a plate.

[0075] When the first object 91 and the second object 92 are both in position, the first stamping assembly 10 can be controlled to descend, that is, move toward the second stamping assembly 20 parallel to the first direction F1.

[0076] There is no limitation on the means for controlling the movement of the first punching assembly 10 . For example, a servo system may be used. However, the system may be designed according to actual needs and is not limited thereto.

[0077] See also Figure 5As shown, the first punching seat 11 drives the punch 12, the stripper plate 13, the movable member 14, the guide pins 15, and the feed device 16 to descend synchronously. When the stripper plate 13 is pressed down to the top of the boss 213 of the second punching seat 21, and each guide pin 15 is inserted into the corresponding guide hole 212, the convex portion 1662 at the bottom of the feed seat 166 is approximately in contact with the second object 92.

[0078] At this time, the stripper plate 13 , the movable member 14 and the feeding device 16 cannot move downward any further, while the first punching seat 11 , the punch 12 and the guide pin 15 can still move downward, but the punch 12 has not passed the steel ball 165 .

[0079] See also Figure 6 As shown, the first punching seat 11, the punch 12 and the guide post 15 continue to move downward. When the punch 12 passes the steel balls 165, each steel ball 165 is pushed outward, and the steel balls 165 push the second swing arm 1622 to swing and make the first end 1641 of the positioning member 164 exit the first through portion 1611, and the first swing arm 1621 compresses the elastic member 163.

[0080] Since the positioning member 164 originally supporting the first object 91 exits the first through portion 1611 , the first object 91 falls from the first through portion 1611 into the second through portion 1661 and then falls on the top of the second object 92 . At this time, the first object 91 and the second object 92 are only in contact with each other but have not yet been riveted to each other.

[0081] When the first object 91 falls into the second through-hole 1661 and the first detection element 167 detects the first object 91, the first detection element 167 sends a signal to the servo system to control the first punching seat 11, the punch 12, and the guide post 15 to continue to move downward. Conversely, if the first detection element 167 does not detect the first object 91, it sends a signal to the servo system to control the first punching seat 11, the punch 12, and the guide post 15 to stop moving downward, and then the operator can conduct an inspection.

[0082] See also Figure 7 As shown, the first punching seat 11 drives the punch 12 to continue to move downward, and the punch 12 is used to punch the first object 91 into the second object 92 to rivet them into a finished product.

[0083] When the first object 91 is pressed into the second object 92, the first object 91 will shear the material at the corresponding position of the second object 92, so that the first object 91 is embedded in the second object 92, and the sheared material 921 at the corresponding position of the second object 92 will be discharged from the second stamping seat 21 through the fourth through-hole 221 of the rivet seat 22 and the third through-hole 211 of the second stamping seat 21.

[0084] Then the servo system controls the first stamping assembly 10 to rise parallel to the first direction F1 and return to Figure 4 The state shown is then placed on the first object 91 and the second object 92 to carry out the stamping and riveting process of the next component.

[0085] For the structure of the first object 91 and the second object 92 being punched and riveted together, please refer to Figure 8 and Figure 9 A magnified structural diagram of . Figure 8 It shows that the first object 91 and the second object 92 have not yet been punched and riveted together. Figure 9 The diagram shows a situation where a first object 91 and a second object 92 are punched and riveted together to produce a sheared material 921 .

[0086] See also Figures 4 to 7 As shown, according to the above description of the punch riveting process, the dimensions of the first through portion 1611 and the second through portion 1661 are designed to allow the first object 91 to pass through. The dimensions of the third through portion 211 and the fourth through portion 221 are designed to allow the sheared material 921 to pass through.

[0087] The shapes of the first through portion 1611 , the second through portion 1661 , the third through portion 211 and the fourth through portion 221 may be designed according to the actual shapes of the first object 91 and the cut material 921 .

[0088] For example, if the first object 91 is a hexagonal nut, the cross-sections of the first through portion 1611 and the second through portion 1661 may be hexagonal or circular, or other shapes that allow the first object 91 to move smoothly in the first through portion 1611 and the second through portion 1661 parallel to the first direction F1.

[0089] Similarly, the shapes of the third through portion 211 and the fourth through portion 221 can be configured according to the shape of the shear material 921 , or can be other shapes that allow the shear material 921 to smoothly move in the third through portion 211 and the fourth through portion 221 parallel to the first direction F1 .

[0090] See also Figure 4 and Figure 10 As shown, the first object 91 and the second object 92 can be placed by motor or manually.

[0091] For example Figure 10 Shows a method of blowing the first object 91 to a designated location by specifying air pressure parameters and a mechanism, i.e. Figure 4 In the feeding device 16 shown, the second object 92 is a long plate that is continuously fed into the machine.

[0092] The first detecting element 167 detects whether the first object 91 has fallen, and the second detecting element 168 detects whether the first object 91A is positioned.

[0093] Figure 10 The image shows first object 91 at the bottom being press-riveted to second object 92, and another first object 91A at the top being positioned. Once second object 92, to which first object 91 is press-riveted, is removed, it can be lowered onto the top of second object 92 for the next press-riveting process. Following first object 91A, the other first objects 91B-91E await subsequent press-riveting processes.

[0094] In summary, the punching and riveting mechanism provided by the present invention can directly make the first object and the second object ideally engage and rivet together by punching without the need for additional riveting equipment. The manufacturing process is simple, fast and of stable quality, thereby reducing production costs.

[0095] Although the present invention has been disclosed by the above-described embodiments, they are not intended to limit the present invention. Any person skilled in the art with ordinary knowledge in the relevant field should be able to make slight changes and modifications without departing from the spirit and scope of the present invention, and all of these fall within the scope of protection of the present invention.

Claims

1. A stamping riveting mechanism comprising a first stamping assembly and a second stamping assembly arranged vertically parallel to a first direction, the first stamping assembly being disposed above the second stamping assembly and being movable relative to the second stamping assembly parallel to the first direction, the first stamping assembly being provided with a first object, and the second stamping assembly being provided with a second object, characterized in that: The first punching assembly includes a first punching seat, a punch, a stripper plate, a plurality of movable parts, a plurality of guide pins and a feeding device, wherein: The punch has a first top end and a first bottom end opposite to each other, the first top end is disposed on the first punching seat, and the first bottom end is parallel to the first direction and faces the second punching assembly; The stripper plate is arranged below the first punching seat; The movable member has a second top end and a second bottom end opposite to each other. The movable member is movably disposed in parallel with the first direction and penetrates the first punching seat. The second bottom end is connected to the stripper plate, thereby enabling the first punching seat to move relative to the stripper plate in parallel with the first direction. Each of the guide posts has a third top end and a third bottom end opposite to each other, the third top end is disposed on the first punching seat, and the third bottom end faces the second punching assembly. Each of the guide posts is movably disposed through the stripper plate parallel to the first direction. The feeding device includes a base, a plurality of pendulums, a plurality of elastic members, a plurality of positioning members, a plurality of steel balls and a feeding seat, wherein: The base is disposed on the stripper plate, and has a first through portion that penetrates the base in parallel with the first direction. The first bottom end of the punch extends into the first through portion in parallel with the first direction and moves in the first through portion in parallel with the first direction. Each of the swing elements is pivotally mounted on the base via a pivot axis. The swing element has a first swing arm and a second swing arm symmetrically relative to the pivot axis, with the first swing arm located above the second swing arm. The elastic direction of each elastic member is parallel to a second direction, and opposite ends of each elastic member parallel to the elastic direction respectively abut against the first swing arm and the base, and the second direction is perpendicular to the first direction; Each positioning member has a first end and a second end opposite to each other parallel to the second direction, the first end can extend into or exit the first through portion, and the second end is connected to the second swing arm; Each of the steel balls is disposed in the base and is located between the pivot shaft and the positioning member. Each of the steel balls is movable between a release position and a push position. When each of the steel balls is in the release position, a portion of each of the steel balls protrudes from the first penetration portion. When each of the steel balls is in the push position, each of the steel balls exits the first penetration portion. The feed seat is disposed at the bottom of the base, and has a second through portion. The second through portion penetrates the feed seat in parallel with the first direction. The first through portion and the second through portion can allow the first object to pass through. When the steel balls are in the release position, the elastic members push the first swing arms outward, and the second swing arms drive the first ends of the positioning members to extend into the first through-holes, thereby holding the first object in a suspended state by the first ends of the positioning members. When the punch passes through the steel balls, it pushes the steel balls outward, and the steel balls push the second swing arms to swing and make the first ends of the positioning members exit the first through-holes. The first swing arms compress the elastic members, and the first object falls from the first through-holes into the second through-holes and then falls on top of the second object. The second stamping assembly includes a second stamping seat and a riveting seat, wherein: The second punching seat has a third through portion and a plurality of guide holes. The third through portion penetrates the second punching seat parallel to the first direction. The axial length of each guide hole is parallel to the first direction. When each guide post moves parallel to the first direction, it can enter or exit the corresponding guide hole and can move within the guide hole parallel to the first direction. The second punching seat is respectively provided with a boss on two opposite sides parallel to the second direction, and a recess is formed between the two bosses. The rivet seat is arranged in the recess of the second punching seat, and the rivet seat has a fourth penetration portion, which penetrates the rivet seat parallel to the first direction. The third penetration portion and the fourth penetration portion allow sheared material generated after the first object and the second object are punched and riveted to pass through.

2. The punch riveting mechanism according to claim 1, wherein: Each of the ornaments is assembled with one of the elastic members, one of the positioning members and one of the steel balls, and is symmetrically arranged on the periphery of the first penetrating portion.

3. The punch riveting mechanism according to claim 1, wherein: The projection range of the first through portion of the base falls within the projection range of the second through portion of the feed seat.

4. The punch riveting mechanism according to claim 1, wherein: The feeding device also includes: a first detection element disposed in the second through-hole to detect whether the first object is in the second through-hole; and A second detection element is disposed in the first penetrating portion to detect whether the first object is in the first penetrating portion.

5. The punch riveting mechanism according to claim 1, wherein: The projection range of the third penetrating portion falls within the projection range of the fourth penetrating portion, and the projection range of the fourth penetrating portion is equal to or greater than the projection range of the third penetrating portion.

6. The punch riveting mechanism according to claim 1, wherein: The projection ranges of the first through portion and the second through portion cover the projection range of the third through portion, and the projection ranges of the first through portion and the second through portion are larger than the projection range of the third through portion.

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