Self-piercing riveting equipment
Self-piercing riveting equipment, through components such as C-clamps and riveting dies, solves the problems of porosity and cracks in traditional welding methods when joining aluminum alloys and steel, and achieves high-quality multi-layer metal sheet connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-17
AI Technical Summary
Traditional welding methods are difficult to use effectively to join different materials such as aluminum alloys and steel, and are prone to defects such as porosity and cracks, and the quality of the connection is difficult to guarantee.
Using self-piercing riveting equipment, components such as C-clamps, rivet bases, rivet dies, and magazine mechanisms are employed to achieve a firm connection of multi-layer metal sheets by deforming the rivets under the action of the rivet die.
A robust connection of multiple metal sheets was achieved without damaging the outer surface of the underlying sheet, thus improving the connection quality and reliability.
Smart Images
Figure CN223997233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connection equipment technology, and in particular to a self-piercing riveting device. Background Technology
[0002] With the development of the automotive industry, especially the increasing trend towards lightweight vehicles, automakers have begun to use lightweight materials such as aluminum alloys, high-strength steel, and composite materials extensively. Self-piercing riveting, capable of effectively joining multiple materials, emerged in this context to meet the demand for new material connections in automotive body manufacturing. Self-piercing riveting is a cold joining technology used to join two or more metal sheets. A specially designed rivet penetrates the top sheet, and under the action of the riveting die, the hollow structure at the rivet's tail expands and pierces the bottom sheet without penetrating it, thus forming a strong riveting point.
[0003] Traditional joining methods, such as spot welding, face challenges when joining these different material combinations. For example, aluminum alloys have different electrical and thermal conductivity than steel, and spot welding aluminum alloys is prone to defects such as porosity and cracks. Moreover, the differences in physical and chemical properties between different materials make it difficult for traditional welding methods to guarantee the quality of the joint.
[0004] Therefore, a self-piercing riveting device is proposed to solve the above problems. Utility Model Content
[0005] Given the challenges faced by traditional connection methods such as spot welding when joining these different material combinations—for example, aluminum alloys have different electrical and thermal conductivity than steel, making it easy to produce defects such as porosity and cracks when spot welding aluminum alloys—and the differences in physical and chemical properties between different materials also make it difficult for traditional welding methods to guarantee the quality of the connection, this utility model was proposed.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-piercing riveting device, comprising a C-type clamp, a riveting seat provided on the lower jaw of the C-type clamp, a riveting die provided on the top of the riveting seat, a magazine mechanism provided above the side of the C-type clamp away from the jaw, a power cylinder provided above the upper jaw of the C-type clamp, a servo motor provided on the power cylinder, an actuator connected to the power cylinder, a nail feeder provided on the actuator, a rivet nose provided at the bottom of the nail feeder, a nail supply tube connected between the magazine mechanism and the actuator, and the rivet nose and the nail feeder located directly above the riveting die.
[0007] Preferably, the magazine mechanism includes a magazine assembly, a control module, a magazine bracket, and a magazine valve island. The magazine bracket is fixedly connected to the C-type clamp, the magazine assembly is disposed on the magazine bracket, the control module is connected to the magazine assembly, and the magazine valve island is fixed to the control module and connected to the magazine assembly.
[0008] Preferably, the magazine assembly includes a magazine door assembly, a magazine fullness measuring assembly, a magazine cutter assembly, and a U-shaped component. The magazine door assembly is located at the top of the magazine assembly, the magazine fullness measuring assembly is located on the side of the magazine assembly, the U-shaped component is located at the bottom of the magazine assembly, a track is provided inside the magazine assembly, the U-shaped component communicates with the track, and the magazine cutter assembly is located between the U-shaped component and the track.
[0009] Preferably, there are two tracks, and the two tracks are independent of each other.
[0010] Preferably, the angle range of the U-shaped component is 0°. 0 -360 0 .
[0011] Preferably, the C-type clamp has a flange on the side away from the jaws for connecting to external equipment.
[0012] The beneficial effects of this utility model are:
[0013] By selecting appropriate rivets, rivet dies, and riveting parameters, and relying on the downward pressure provided by the self-piercing riveting equipment, the rivet is pushed downward to pierce the upper plate. Under the action of the rivet die, the tail of the rivet is squeezed and deformed, and the lower plate is locked from the inside without affecting the integrity of the outer surface of the lower plate. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0015] Figure 1 This is a schematic diagram of the structure of the self-piercing riveting equipment of this utility model.
[0016] Figure 2 This is a schematic diagram of the magazine mechanism of this utility model.
[0017] Figure 3 This is a schematic diagram of the magazine assembly structure of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Servo motor; 2. Magazine mechanism; 21. Magazine assembly; 211. Magazine door assembly; 212. Magazine fullness test assembly; 213. Track; 214. U-shaped component; 215. Magazine bolt cutting assembly; 22. Control module; 23. Magazine bracket; 24. Magazine valve island; 3. Flange; 4. C-clamp; 5. Power cylinder; 6. Actuator; 7. Bolt feeder; 8. Rivet nose; 9. Riveting die; 10. Rivet seat; 11. Bolt supply pipe. Detailed Implementation
[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0021] Reference Figures 1 to 3 This invention provides a self-piercing riveting device, comprising a C-type clamp 4, a rivet seat 10 on the lower jaw of the C-type clamp 4, a rivet die 9 on the top of the rivet seat 10, a magazine mechanism 2 on the side of the C-type clamp 4 away from the jaw, a power cylinder 5 on the upper jaw of the C-type clamp 4, a servo motor 1 on the power cylinder 5, an actuator 6 connected to the power cylinder 5, a nail feeder 7 on the actuator 6, a rivet nose 8 at the bottom of the nail feeder 7, a nail supply tube 11 connecting the magazine mechanism 2 and the actuator 6, and the rivet nose 8 and the nail feeder 7 located directly above the rivet die 9.
[0022] Specifically, C-clamps are load-bearing components in the riveting process; their specific dimensions and structural form can be customized according to requirements. The U-shaped fittings have an angle range of 0°. 0 -360 0 The actuator 6, magazine mechanism 2, rivet seat 10 and other components are mounted on the C-type clamp.
[0023] Specifically, the riveting die 9, rivets, and equipment together determine the riveting quality. The riveting die 9 is fixedly mounted on the rivet base 10, which is fixedly mounted on the lower jaw of the C-type clamp 4. The rivet base 10 is equipped with an adjustable mechanism that can adjust the alignment of the riveting die 9 and the rivet rod within a certain range to ensure the riveting quality.
[0024] Specifically, the actuator 6 transmits the linear force of the power cylinder 5 to the rivet nose 8 and the rivet rod, providing preload force for the sheet metal and riveting force for the rivet. The actuator 6 has a rivet nose 8 at its bottom, which is in direct contact with the rivet and the sheet metal, ensuring that the rivet is smoothly anchored into the sheet metal and providing preload force for the entire riveting process. Furthermore, the rivet nose 8 is a duckbill type rivet nose, which has the advantages of good guiding function, long service life and easy replacement. The rivet nose 8 is located directly above the riveting die 9.
[0025] Specifically, the actuator 6 is connected to a rivet feeder 7, which delivers the rivets in the magazine mechanism 2 to the front end. The rivet feeder 7 is equipped with a sensor that can detect whether the rivets have entered the rivet feeder 7 and maintain the correct posture.
[0026] Specifically, the actuator 6 is equipped with a power cylinder 5 on top, and a servo motor 1 is mounted on the power cylinder 5. The power cylinder 5 converts the torque of the servo motor 1 into a linear riveting force, which in turn pushes the pre-tightening cylinder to press the rivet nose 8 to the material to be riveted and to keep moving. At the same time, it pushes the rivet rod to press the rivet into the material to be riveted, thus completing the riveting.
[0027] Specifically, the magazine mechanism 2 has the functions of storing and supplying bolts. The magazine mechanism 2 includes a magazine assembly 21, a control module 22, a magazine support 23, and a magazine valve island 24. The magazine support 23 is fixedly connected to the C-type clamp 4. The magazine assembly 21 is disposed on the magazine support 23. The control module 22 is connected to the magazine assembly 21. The magazine valve island 24 is fixed to the control module 22 and connected to the magazine assembly 21. The magazine assembly 21 includes a magazine door assembly 211, a magazine fullness measuring assembly 212, a magazine bolt cutting assembly 215, and a U-shaped component 214. The magazine door assembly 211 is disposed on the top of the magazine assembly 21. The magazine fullness measuring assembly 212 is disposed on the side of the magazine assembly 21. The U-shaped component 214 is disposed on the bottom of the magazine assembly 21. The internal structure of component 21 has two independent tracks 213, which can store rivets of the same diameter series to meet the riveting requirements of different material combinations. The U-shaped component 214 is connected to the track 213, and a magazine rivet cutter assembly 215 is set between the U-shaped component 214 and the track 213. The magazine door assembly 211 is a mechanism for restricting the entry and exit of rivets. When filling the magazine, the magazine door is opened, and the rivets enter the magazine through the magazine door. When riveting, the magazine door is closed to ensure that the rivets do not fall out of the magazine channel. The magazine fullness test assembly 212 is a detection device for detecting whether the magazine is full of rivets. The magazine rivet cutter assembly 215 is a device for sending the rivets out from the track 213. The control module 22 communicates with the control cabinet through the bus. The valve island is a module for signal input and output.
[0028] Specifically, the C-type clamp 4 has a flange 3 on the side away from the jaws. The flange 3 can be connected to the robot via a tool changer or an adapter flange 3.
[0029] Working principle: Select a suitable rivet and place the plate in the middle of the C-clamp 4. Relying on the downward pressure provided by the self-piercing riveting equipment, push the rivet downward to pierce the upper plate. Under the action of the riveting die 9, the tail of the rivet is squeezed and deformed. Without affecting the integrity of the outer surface of the lower plate, the lower plate is locked from the inside, and the riveting is completed.
[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A self-piercing riveting apparatus comprising a C-clip (4), characterized in that: The C-shaped pliers (4) are provided with a riveting seat (10) on the lower jaw, the top of the riveting seat (10) is provided with a riveting die (9), the C-shaped pliers (4) are provided with a cartridge mechanism (2) above the side away from the jaw, the C-shaped pliers (4) are provided with a power cylinder (5) above the upper jaw, the power cylinder (5) is provided with a servo motor (1), the power cylinder (5) is connected with an actuator (6), the actuator (6) is provided with a nail feeder (7), the bottom of the nail feeder (7) is provided with a riveting nose (8), the cartridge mechanism (2) and the actuator (6) are connected with a nail feeding pipe (11), the riveting nose (8) and the nail feeder (7) are located directly above the riveting die (9).
2. A self-piercing riveting apparatus according to claim 1, wherein: The cartridge mechanism (2) comprises a cartridge assembly (21), a control module (22), a cartridge support (23) and a cartridge valve island (24), the cartridge support (23) is fixedly connected to the C-shaped pliers (4), the cartridge assembly (21) is arranged on the cartridge support (23), the cartridge assembly (21) is connected with the control module (22), and the cartridge valve island (24) is fixed to the control module (22) and connected with the cartridge assembly (21).
3. A self-piercing riveting apparatus according to claim 2, wherein: The cartridge assembly (21) comprises a door assembly (211), a cartridge fullness measuring assembly (212), a cartridge nail cutting assembly (215) and a U-shaped piece (214), the door assembly (211) is arranged on the top of the cartridge assembly (21), the cartridge fullness measuring assembly (212) is arranged on the side of the cartridge assembly (21), the U-shaped piece (214) is arranged on the bottom of the cartridge assembly (21), the cartridge assembly (21) is internally provided with a track (213), the U-shaped piece (214) is in communication with the track (213), and the cartridge nail cutting assembly (215) is arranged between the U-shaped piece (214) and the track (213).
4. A self-piercing riveting apparatus according to claim 3, wherein: The track (213) is in the form of two tracks, and the two tracks are independent of each other.
5. A self-piercing riveting apparatus according to claim 3, wherein: The U-shaped piece (214) has an angle ranging from 0 0 -360 0 .
6. A self-piercing riveting apparatus according to claim 1, wherein: The C-shaped pliers (4) are provided with a flange (3) on the side away from the jaw, which is used for connecting with external equipment.