A turret cylinder spin riveting apparatus

Abstract

The utility model discloses a rotary table air cylinder spin riveting equipment, including equipment frame, the top of equipment frame is fixedly provided with rotary motor, and the top below of equipment frame is installed with spin riveting air cylinder, and the bottom of spin riveting air cylinder is installed with riveting head subassembly, and the output of rotary motor is connected spin riveting air cylinder, the below of riveting head subassembly is installed with rotary table mechanism, and the bottom of rotary table mechanism is installed with rotary table drive module, and the one side of rotary table drive module is installed with nail bin and nail feeding mechanism. This rotary table air cylinder spin riveting equipment, when a group of workpieces complete riveting work, remove the riveting station at the bottom of riveting head subassembly, when the circular rotary table rotates 90 degrees, the workpiece that has not completed riveting moves into the riveting station, can eliminate equipment standby waste to the greatest extent, makes riveting head subassembly keep the efficient continuous riveting state all the time, avoids the problem that traditional single piece changes when equipment long time idle, directly increases single day capacity.

Description

Technical Field

[0001] This utility model relates to the field of riveting equipment, specifically a rotary table cylinder riveting equipment. Background Technology

[0002] Riveting equipment (riveting machine), also known as riveting press, riveting machine, and rivet machine, is widely used in various riveting processes in industries such as electronics, electrical appliances, instruments, watch components, auto parts, textile equipment, machinery, construction, photographic equipment, hardware tools, medical equipment, daily necessities, and stationery. The radial assembly and rolling process of the flange after the wheel hub unit is assembled also requires riveting equipment for radial riveting. The structure of the riveting equipment mainly consists of a motor, a main shaft, a riveting head, and a riveting head pressing mechanism. The lower part of the main shaft is connected to a spherical riveting seat that is eccentric to its axis. The riveting head is installed in the spherical riveting seat. The riveting head is eccentric to the main shaft and tilted at a certain angle to roll or swing the riveted parts.

[0003] Regarding the patent for riveting equipment, after searching, Chinese patent with publication number CN100584480C discloses a radial CNC riveting equipment for a wheel hub unit. The paper includes a main frame, a riveting head, and an electric push cylinder. A table is provided on the main frame, and the electric push cylinder is installed below the table. The upper end of the push rod of the electric push cylinder is connected to a movable plate. A pressure sensor and a displacement sensor are installed inside the electric push cylinder. A tooling alignment device and an automatic tooling identification device are installed on the movable plate. The riveting head is installed above the table.

[0004] Although the above-mentioned device can be controlled by sensors to achieve precise control of riveting pressure and displacement, thus ensuring riveting quality, in actual use, after a group of workpieces is riveted on the riveting workbench, the fixture needs to be removed, the riveted workpiece removed, and a new workpiece installed. During this process, the equipment is in a standby state for a long time. The core value of the riveting equipment is "riveting processing". It cannot generate any processing value when it is in standby. Assuming that a single workpiece change (removing the fixture, taking out the finished product, installing the new workpiece, and resetting the fixture) takes 2 to 5 minutes, if the workpiece is changed 50 times a day, the cumulative standby time can reach 100 to 250 minutes, accounting for 20% to 52% of the 8-hour working time. This is equivalent to the equipment being "idle" for nearly half the time, directly reducing the daily output. Utility Model Content

[0005] The purpose of this invention is to provide a rotary table cylinder riveting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a rotary table cylinder riveting device is provided, comprising a machine frame, a rotary motor fixedly mounted on the top of the machine frame, a riveting cylinder mounted below the top of the machine frame, a riveting head assembly mounted at the bottom of the riveting cylinder, and the output end of the rotary motor connected to the riveting cylinder. A rotary table mechanism is mounted below the riveting head assembly, and a rotary table drive module is mounted at the bottom of the rotary table mechanism. A nail magazine and a nail feeding mechanism are mounted on one side of the rotary table drive module. The rotary table mechanism includes a circular rotary table, and four sets of tooling fixtures are equidistantly mounted on the circular rotary table.

[0007] Furthermore, the riveting cylinder is vertically mounted on the equipment frame, and the lower end of the piston rod of the riveting cylinder is connected to the riveting head assembly through a floating joint. The riveting cylinder has a built-in pressure sensor.

[0008] Furthermore, a guide mechanism is installed on one side of the riveting cylinder, and the guide mechanism consists of two parallel linear guide rails and a slider. The linear guide rails are vertically fixed on both sides of the equipment frame, and the slider is connected to the side of the piston rod of the riveting cylinder.

[0009] Furthermore, the turntable drive module includes a servo motor, a harmonic reducer, and a turntable mechanism. The servo motor and harmonic reducer are both installed in a mounting box located at the bottom of the turntable mechanism, and the output shaft of the servo motor is connected to the rotation shaft of the turntable mechanism.

[0010] Furthermore, the tooling fixture includes a clamping plate, a buffer seat, a limiting space, a limiting rod, a drive seat, a reciprocating lead screw, a bearing seat, and a main shaft. A rotating shaft mounting hole is provided in the center of the circular turntable, and four sets of limiting spaces are provided at equal intervals on the circular turntable. The limiting spaces are rectangular.

[0011] Furthermore, each of the four sets of limiting spaces is fixedly equipped with a limiting rod, and a drive seat is sleeved on the outside of the limiting rod. A clamping plate is fixedly installed on the top of the drive seat. A dovetail groove is opened on the inner wall of the clamping plate, and a dovetail block is inserted inside the dovetail groove. At the same time, the dovetail block is fixedly connected to the back of the buffer seat. The buffer seat is made of rubber, and both the buffer seat and the clamping plate are isosceles trapezoids.

[0012] Furthermore, the bottom of the drive seat is provided with a screw hole, and a reciprocating screw is screwed into the screw hole. Two sets of reciprocating screws are provided. A main shaft is installed at the end of the reciprocating screw, and the main shaft passes through a bearing seat. The bearing seat is fixed to the bottom of the circular turntable, and a motor mounting hole is provided on the bottom of the circular turntable near the position of the main shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This solution uses four sets of tooling fixtures on a circular turntable to simultaneously install four sets of workpieces to be riveted. When a set of workpieces completes the riveting work and moves out of the riveting station located at the bottom of the riveting head assembly, the circular turntable rotates 90 degrees, and the workpieces that have not been riveted move into the riveting station. This can minimize equipment downtime waste and keep the riveting head assembly in a highly efficient and continuous riveting state. It avoids the problem of long-term equipment idleness during traditional single part change and directly increases daily production capacity.

[0015] 2. This solution utilizes a detachable rubber buffer seat on the inner side of the clamping plate. This effectively buffers the impact force of the clamping plate on the workpiece during clamping, preventing damage such as indentations and scratches on the workpiece surface caused by clamping force. At the same time, the friction of the rubber material further enhances the clamping firmness of the workpiece, preventing displacement during processing. Both the buffer seat and the clamping plate are designed in an isosceles trapezoidal shape, which is suitable for various workpiece shapes with trapezoidal contours or those requiring even clamping from both sides. It also allows the clamping force of the clamping plate and the buffer seat to be more evenly distributed on the contact surface. The detachable design of the buffer seat facilitates the replacement of buffer seats of different specifications or thicknesses according to the workpiece size and material, enhancing the adaptability of the tooling fixture to different types of workpieces. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the turntable mechanism of this utility model;

[0019] Figure 4 for Figure 3 Side view;

[0020] Figure 5 A schematic diagram showing four sets of tooling fixtures mounted on the turntable mechanism;

[0021] Figure 6 for Figure 5 A bottom view;

[0022] Figure 7 for Figure 5 Side view;

[0023] Figure 8 for Figure 5 A sectional view.

[0024] The following are the labels in the diagram: 1. Equipment frame; 2. Rotary motor; 3. Riveting cylinder; 4. Riveting head assembly; 5. Nail magazine; 6. Nail feeding mechanism; 7. Turntable drive module; 8. Turntable mechanism; 81. Circular turntable; 82. Tooling fixture; 821. Clamping plate; 822. Buffer seat; 823. Limiting space; 824. Limiting rod; 825. Drive seat; 826. Reciprocating lead screw; 827. Bearing seat; 828. Spindle. Detailed Implementation

[0025] Please see Figure 1-8 This utility model provides a rotary cylinder riveting device, including a machine frame 1. A rotary motor 2 is fixedly installed on the top of the machine frame 1, and a riveting cylinder 3 is installed below the top of the machine frame 1. A riveting head assembly 4 is installed at the bottom of the riveting cylinder 3. The output end of the rotary motor 2 is connected to the riveting cylinder 3. A rotary table mechanism 8 is installed below the riveting head assembly 4, and a rotary table drive module 7 is installed at the bottom of the rotary table mechanism 8. A nail magazine 5 and a nail feeding mechanism 6 are installed on one side of the rotary table drive module 7. The rotary table mechanism 8 includes a circular rotary table 81, and four sets of tooling fixtures 82 are installed at equal intervals on the circular rotary table 81.

[0026] Working Principle: In actual use, four sets of workpieces to be riveted are placed on a circular turntable 81 and clamped and fixed by four sets of tooling fixtures 82. The circular turntable 81 is driven to rotate stepwise by a turntable drive module 7, which is equipped with a servo motor and a precision harmonic reducer. The servo motor is installed at the bottom of the equipment base and connected to the input shaft of the harmonic reducer via a flexible coupling. The output shaft of the harmonic reducer is coaxially fixed with the rotation shaft of the circular turntable 81. The circular turntable 81 is horizontally installed in the center of the equipment's worktable, with four sets of rotating riveting stations evenly distributed on its surface. Each of the four rotating riveting stations is equipped with a tooling fixture 82 for fixing the workpieces. The servo motor is connected to the equipment control system via electrical circuitry and receives control commands to drive the turntable to rotate. At this time, the riveting head assembly 4 can... Under the action of the riveting cylinder 3, it moves downward and can rotate under the action of the rotary motor 2, so that the riveting head assembly 4 can perform rotational riveting work on the workpiece. The rivet can be fed through the rivet magazine 5 and the rivet feeding mechanism 6. Preferably, the feeding and unloading on the circular turntable 81 can be realized by an external automatic loading and unloading module. The specific solution is as follows: the automatic loading and unloading module includes a conveyor line, a robot arm and a vision positioning system. The conveyor line is arranged parallel to the circular turntable 81 and is used to transport the workpiece to be processed and collect the finished product. The robot arm is installed between the conveyor line and the turntable. It adopts a four-axis robot structure and is equipped with a vacuum suction cup or pneumatic gripper at the end. The vision positioning system consists of an industrial camera and a light source. The industrial camera is installed above the conveyor line and is used to identify the position and posture of the workpiece. The data is transmitted to the control system via Ethernet to provide the robot arm with accurate grasping coordinates.

[0027] Four sets of tooling fixtures 82 on the circular turntable 81 can simultaneously mount four sets of workpieces to be riveted. When a set of workpieces completes the riveting work and moves out of the riveting station located at the bottom of the riveting head assembly 4, the circular turntable 81 rotates 90 degrees, and the workpieces that have not yet been riveted move into the riveting station. This process is repeated. By using the circular turntable 81 with four sets of tooling fixtures 82, and rotating 90 degrees after each set of workpieces is riveted to move the new workpiece into the riveting station at the bottom of the riveting head assembly 4, the idle time of the equipment can be minimized, ensuring that the riveting head assembly 4 is always in a highly efficient and continuous riveting state, avoiding the problem of long-term idle time of the equipment during traditional single-part change. The four sets of tooling fixtures 82 can simultaneously mount the workpieces to be riveted, and the operator can switch between workpieces during the rotation of the circular turntable 81. Simultaneously, the system disassembles riveted workpieces and clamps new workpieces, enabling parallel processing and part changing operations, significantly improving workpiece processing efficiency per unit time. Meanwhile, the circular turntable 81 rotates precisely 90 degrees each time, ensuring that the workpieces to be riveted, driven by each set of tooling fixtures 82, are stably moved into the riveting position at the bottom of the riveting head assembly 4, guaranteeing consistent workpiece positioning accuracy and reducing fluctuations in riveting quality caused by frequent manual adjustments to workpiece positions. Furthermore, the cyclical operation mode allows for a more stable production line cycle, smoother connection between previous workpiece assembly and subsequent riveting processing, avoiding workpiece accumulation or material shortages, and improving the overall continuity of the production process. The design of the four sets of tooling fixtures 82 also reserves space for subsequent capacity adjustments or process optimization, better adapting to the riveting needs of different batches of workpieces.

[0028] In a preferred embodiment, the riveting cylinder 3 is vertically mounted on the equipment frame 1. The lower end of the piston rod of the riveting cylinder 3 is connected to the riveting head assembly 4 through a floating joint. The riveting cylinder 3 has a built-in pressure sensor.

[0029] A guide mechanism is installed on one side of the riveting cylinder 3. The guide mechanism consists of two parallel linear guide rails and a slider. The linear guide rails are vertically fixed on both sides of the equipment frame 1, and the slider is connected to the side of the piston rod of the riveting cylinder 3.

[0030] The turntable drive module 7 includes a servo motor, a harmonic reducer, and a turntable mechanism 8. The servo motor and harmonic reducer are both installed in a mounting box located at the bottom of the turntable mechanism 8. At the same time, the output shaft of the servo motor is connected to the rotation shaft of the turntable mechanism 8.

[0031] In a preferred embodiment, the tooling fixture 82 includes a clamping plate 821, a buffer seat 822, a limiting space 823, a limiting rod 824, a drive seat 825, a reciprocating lead screw 826, a bearing seat 827, and a main shaft 828. A rotating shaft mounting hole is provided in the middle of the circular turntable 81, and four sets of limiting spaces 823 are equally spaced on the circular turntable 81. The limiting spaces 823 are rectangular.

[0032] Each of the four limiting spaces 823 is fixedly equipped with a limiting rod 824, and a drive seat 825 is sleeved on the outside of the limiting rod 824. A clamping plate 821 is fixedly installed on the top of the drive seat 825. A dovetail groove is opened on the inner wall of the clamping plate 821, and a dovetail block is inserted inside the dovetail groove. At the same time, the dovetail block is fixedly connected to the back of the buffer seat 822. The buffer seat 822 is made of rubber. Both the buffer seat 822 and the clamping plate 821 are isosceles trapezoids.

[0033] The bottom of the drive base 825 is provided with a screw hole, and a reciprocating screw 826 is screwed into the screw hole. Two sets of reciprocating screws 826 are provided. A main shaft 828 is installed at the end of the reciprocating screw 826, and the main shaft 828 passes through the bearing seat 827. The bearing seat 827 is fixed to the bottom of the circular turntable 81, and a motor mounting hole is provided on the bottom of the circular turntable 81 near the position of the main shaft 828.

[0034] like Figure 5 , Figure 6 , Figure 7 and Figure 8As shown: When using the tooling fixture 82, its specific working method is as follows: The motor is installed inside the motor mounting hole. This motor is electrically connected to the equipment controller. The motor drives the spindle 828 to rotate. The spindle 828 drives two sets of reciprocating lead screws 826 to move. Each set of reciprocating lead screws 826 is equipped with a drive seat 825. Each set of drive seats 825 is equipped with a clamping plate 821, so that the two sets of clamping plates 821 move synchronously inward or outward, realizing the clamping or releasing of the workpiece. A rubber buffer seat 822 is detachably installed on the inner side of the clamping plate 821. Both the buffer seat 822 and the clamping plate 821 are isosceles trapezoids. The tooling fixture 82 is electrically connected to the equipment controller via a motor, which drives the spindle 828 to rotate. The spindle 828 then drives two sets of reciprocating lead screws 826 to move, which in turn drives the two sets of clamping plates 821 to move synchronously inward or outward via the drive seats 825 on the reciprocating lead screws 826. The electrically controlled transmission method can precisely control the clamping force and opening distance of the clamping plates 821, avoiding... The design eliminates the problem of uneven force or positioning deviation during manual clamping, ensuring the stability and consistency of workpiece clamping. The detachable rubber buffer seat 822 installed inside the clamping plate 821 effectively buffers the impact force of the clamping plate 821 on the workpiece, preventing damage such as indentations and scratches on the workpiece surface due to clamping force. At the same time, the friction of the rubber material further enhances the clamping firmness of the workpiece, preventing displacement of the workpiece during processing. Both the buffer seat 822 and the clamping plate 821 are designed as isosceles trapezoids, which can adapt to various workpiece shapes with trapezoidal contours or those that need to be clamped evenly from both sides. It also allows the clamping force of the clamping plate 821 and the buffer seat 822 to be more evenly distributed on the contact surface, further improving clamping stability. The detachable design of the buffer seat 822 allows for subsequent replacement with buffer seats of different specifications or thicknesses according to the workpiece size and material, enhancing the adaptability of the tooling fixture 82 to different types of workpieces. The overall structure takes into account clamping accuracy, workpiece protection, and usage flexibility.

[0035] This equipment operates in the following four steps:

[0036] S1: Automatic feeding. The workpiece to be processed is conveyed to the industrial camera shooting area via the conveyor line. The vision positioning system acquires the workpiece position and posture data and transmits the information to the PLC controller. The PLC controller calculates the robot arm's gripping coordinates based on the data, sends instructions to control the robot arm to move above the workpiece, grips the workpiece with a vacuum suction cup or pneumatic gripper, places it on the circular turntable 81, and positions it with the tooling fixture 82.

[0037] S2: Workstation rotation. Under the command of the PLC controller, the servo motor of the turntable drive module 7 reduces speed and increases torque through a precision harmonic reducer, driving the circular turntable 81 to rotate and sequentially transporting the workstations containing workpieces to the bottom of the riveting execution module; the encoder provides real-time feedback of the turntable angle information to ensure accurate positioning of the workstations.

[0038] S3: Riveting Process. When the workpiece reaches the riveting position, the PLC controller sends a command to start the riveting cylinder 3. The cylinder piston rod drives the riveting head assembly 4 downward to rivet the workpiece. The pressure sensor monitors the riveting pressure in real time and feeds the data back to the PLC controller. The controller adjusts the output of the riveting cylinder 3 according to the preset pressure parameters to ensure stable riveting pressure. After riveting is completed, the riveting cylinder 3 resets. S4: Automatic Unloading. The circular turntable 81 continues to rotate, transporting the riveted workpiece to the unloading position. The PLC controller controls the robot to move above the workpiece, release the pneumatic clamping device, and the robot grabs the finished product and places it on the conveyor line. The conveyor line transports the finished product to the collection area, completing one processing cycle.

[0039] 1. It can achieve the following functions: The high-efficiency automated loading and unloading module works in conjunction with the multi-station turntable to realize continuous automated processing of workpieces. Compared with the single-station manual operation mode, the production efficiency is increased by more than 2 times, reducing manual intervention, labor intensity and safety risks.

[0040] 2. The high-precision control servo-driven turntable positioning system, combined with encoder feedback, achieves a positioning accuracy of ±0.05mm, ensuring accurate riveting position; the riveting cylinder has a built-in pressure sensor and closed-loop control, keeping pressure fluctuations within ±0.2MPa, ensuring stable riveting quality and improving product yield.

[0041] 3. The highly flexible modular tooling fixture supports quick replacement. Combined with the parametric programming of the control system, it can complete the production switch of different specifications of workpieces in a short time, adapt to the processing needs of a variety of products, and improve the versatility and utilization of the equipment.

[0042] 4. Reliable and stable operation: The linear guide mechanism improves the stability of the riveting cylinder movement; the modular design facilitates equipment maintenance; the control system monitors the status of each component in real time, and the fault early warning function reduces downtime and lowers equipment maintenance costs.

Claims

1. A rotary table cylinder riveting device, comprising a machine frame (1), characterized in that: A rotary motor (2) is fixedly installed on the top of the equipment frame (1), and a riveting cylinder (3) is installed below the top of the equipment frame (1). At the same time, a riveting head assembly (4) is installed at the bottom of the riveting cylinder (3), and the output end of the rotary motor (2) is connected to the riveting cylinder (3). A turntable mechanism (8) is installed below the riveting head assembly (4), and a turntable drive module (7) is installed at the bottom of the turntable mechanism (8). At the same time, a nail magazine (5) and a nail feeding mechanism (6) are installed on one side of the turntable drive module (7). The turntable mechanism (8) includes a circular turntable (81), and four sets of tooling fixtures (82) are installed at equal intervals on the circular turntable (81).

2. The rotary table cylinder riveting device according to claim 1, characterized in that: The riveting cylinder (3) is vertically mounted on the equipment frame (1). The lower end of the piston rod of the riveting cylinder (3) is connected to the riveting head assembly (4) through a floating joint. The riveting cylinder (3) has a built-in pressure sensor.

3. The rotary table cylinder riveting device according to claim 2, characterized in that: The riveting cylinder (3) is equipped with a guide mechanism on one side, which consists of two parallel linear guide rails and a slider. The linear guide rails are vertically fixed on both sides of the equipment frame (1), and the slider is connected to the side of the piston rod of the riveting cylinder (3).

4. The rotary table cylinder riveting device according to claim 1, characterized in that: The turntable drive module (7) includes a servo motor, a harmonic reducer and a turntable mechanism (8), and the servo motor and harmonic reducer are both installed in the mounting box located at the bottom of the turntable mechanism (8), while the output shaft of the servo motor is connected to the rotation shaft of the turntable mechanism (8).

5. The rotary table cylinder riveting device according to claim 1, characterized in that: The tooling fixture (82) includes a clamping plate (821), a buffer seat (822), a limiting space (823), a limiting rod (824), a drive seat (825), a reciprocating lead screw (826), a bearing seat (827), and a main shaft (828). A rotating shaft mounting hole is provided in the middle of the circular turntable (81), and four sets of limiting spaces (823) are provided at equal intervals on the circular turntable (81). The limiting spaces (823) are rectangular.

6. The rotary table cylinder riveting device according to claim 5, characterized in that: Each of the four limiting spaces (823) is fixedly equipped with a limiting rod (824), and a drive seat (825) is sleeved on the outside of the limiting rod (824). A clamping plate (821) is fixedly installed on the top of the drive seat (825). A dovetail groove is opened on the inner wall of the clamping plate (821), and a dovetail block is inserted inside the dovetail groove. At the same time, the dovetail block is fixedly connected to the back of the buffer seat (822). The buffer seat (822) is made of rubber. Both the buffer seat (822) and the clamping plate (821) are isosceles trapezoids.

7. The rotary table cylinder riveting device according to claim 6, characterized in that: The bottom of the drive seat (825) is provided with a screw hole, and a reciprocating screw (826) is screwed into the screw hole. Two sets of reciprocating screws (826) are provided. A main shaft (828) is installed at the end of the reciprocating screw (826), and the main shaft (828) passes through the bearing seat (827). The bearing seat (827) is fixed to the bottom of the circular turntable (81), and a motor mounting hole is provided at the bottom of the circular turntable (81) near the position of the main shaft (828).

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