Multi-station cavity closed core-pulling riveting device

Abstract

The application provides a multi-station cavity closed core-pulling riveting device, and relates to the field of die-casting industry. The core-pulling riveting device for die-casting industry comprises a rack, an XY-axis moving slide table, a hollow rotating platform and a riveting mechanism. A special clamp is installed on the hollow rotating platform, and a 90-degree angle rotating cylinder is used to clamp the product. The riveting mechanism comprises a riveting lifting cylinder, a riveting locking limiting cylinder, a servo cylinder, a pulling pressure sensor, an advancing and retreating coaxial screw rod, an advancing and retreating gear synchronous wheel, a proximity sensor and a displacement sensor. The hollow rotating platform is used for realizing multi-station switching, the locking mechanism is used for ensuring the riveting rigidity, the synchronous tooth retreating mechanism is used for protecting the thread, and the sensor is used for real-time monitoring of the riveting process. The application realizes high-precision plugging, greatly improves the production efficiency, realizes intelligent production management, and can be widely applied to the plugging of die-casting cavity in the automobile, aviation, railway and refrigeration industries.

Description

Technical Field

[0001] This invention relates to the technical field of the die casting industry, specifically to a multi-station cavity-closed core-pulling and riveting device. Background Technology

[0002] Currently, the following are commonly used manual tools for sealing in factories: 1. Sealing products requires maintaining the plug perpendicular to the hole diameter and meeting depth requirements. Manually holding tools is unstable, easily leading to increased product defect rates, low efficiency, and inconsistent sealing depths after riveting, resulting in unsuccessful sealing; 2. Manual tools are cumbersome, time-consuming, labor-intensive, and unsafe, and the processed products do not meet the expected results. Traditional processing tools are convenient to carry and inexpensive. However, they cannot achieve high precision and high requirements, and riveting sealing is inefficient.

[0003] Therefore, we provide a multi-station cavity-sealed core-pulling and riveting device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-station, closed-cavity core-pulling and riveting device. This solves the problems of instability, increased product defect rates, low efficiency, cumbersome operation, time-consuming, labor-intensive, and unsafe practices associated with traditional manual tool-based plug installation. Technical Solution 2. To achieve the above objectives, the present invention provides the following technical solution: a multi-station cavity-sealed core-pulling riveting device, comprising a frame; an XY-axis moving slide, the XY-axis moving slide being mounted on the frame; further comprising: a hollow rotating platform, the hollow rotating platform being mounted on the XY-axis moving slide, and at least one riveting mechanism arranged circumferentially around the hollow rotating platform; a special clamp is installed on the table surface of the hollow rotating platform for clamping the product body; the riveting mechanism includes a lifting drive assembly, a locking limit assembly, and a riveting execution assembly, for sealing and plugging process holes on the product.

[0005] Preferably, the XY-axis moving slide is driven by a servo motor and controlled by an EtherCAT bus; the hollow rotating platform is driven by a servo motor and controlled by an EtherCAT bus, realizing motion coordinated control with the XY-axis moving slide.

[0006] Preferably, the special clamp is clamped by a 90° angled rotary cylinder. The rotary cylinder is arranged at a 90° angle, and its pressure arm rotates 90 degrees between the open and closed states to achieve multi-directional rapid clamping of the product body.

[0007] Preferably, the riveting mechanism includes: a riveting lifting cylinder for driving the entire riveting mechanism to move up and down; a riveting locking limit cylinder for locking and fixing the riveting mechanism; a servo electric cylinder as the power source for riveting; a tension / compression sensor installed at the output end of the servo electric cylinder to monitor the tension value during the riveting process in real time; and a forward / backward coaxial screw connected to the output end of the servo electric cylinder. Synchronous gear for advancing and retreating: The synchronous gear for advancing and retreating is sleeved on the coaxial screw for advancing and retreating and is driven by the servo motor for advancing and retreating; Proximity sensor: The proximity sensor is used to detect whether the riveting mechanism is in position.

[0008] Preferably, the advance / retractor timing pulley meshes with the advance / retractor coaxial screw for transmission, and the advance / retractor drive servo motor drives the advance / retractor timing pulley to rotate via a timing belt, thereby driving the advance / retractor coaxial screw to perform the retracting action.

[0009] Preferably, a multi-station cavity-enclosed core-pulling riveting device further includes a displacement sensor, a pressure sensor, a human-machine interface, and a PLC controller; the displacement sensor is used to detect the installation status of the plug; the pressure sensor is used to monitor the pressure value during the riveting process; the PLC controller is connected to each servo motor via an EtherCAT bus and communicates with the company's MES system.

[0010] Preferably, the riveting mechanism is a vertical lifting riveting mechanism or a horizontal fixed riveting mechanism.

[0011] Preferably, the repeatability of the hollow rotating platform is ±5 arc-sec, and the positioning accuracy is ≤15 arc-min.

[0012] Preferably, the multi-station cavity closed-type core-pulling riveting method includes the following steps: S1: Place the product body into a special fixture on the hollow rotating platform, clamp the product with a rotating cylinder, and install the plug at the riveting station at the same time; S2: The products are transported sequentially to each riveting station via the XY axis moving slide and the hollow rotary platform; S3: At each workstation, the riveting mechanism performs riveting actions, including positioning and locking, two-stage riveting, unlocking, synchronous tooth removal, and reset; S4: Collect displacement and pressure data in real time, determine the quality of riveting, and upload the data to the MES system.

[0013] Preferably, step S3 specifically includes: S3.1: The rivet lifting cylinder descends to the lower position, and the rivet locking limit cylinder extends the locking mechanism; S3.2: The servo electric cylinder retracts for the first time, performing the first stage of riveting, breaking the plug, and the pressure sensor detects the pressure value; S3.3: After the pressure reaches the target, the servo electric cylinder retracts for the second time, performing the second stage of riveting into place; S3.4: The displacement sensor and pressure sensor work together to detect and determine whether the riveting position and pressure are within the preset range; S3.5: The servo electric cylinder advances forward by 0.1mm, releasing the locked state; S3.6: The forward and backward drive servo motor drives the forward and backward synchronous wheel to rotate, which in turn drives the forward and backward coaxial screw to rotate, thereby realizing the tooth unwinding action; S3.7: After the riveting is completed, the rivet locking limit cylinder retracts, and the rivet lifting cylinder rises to reset.

[0014] Working Principle: Through the coordinated movement of the XY-axis moving slide 2 and the hollow rotating platform 3, the product clamped on the special fixture is sequentially transported to multiple riveting stations. At each station, the riveting lifting cylinder 401 drives the mechanism to descend, the riveting locking limit cylinder 402 extends and locks to ensure rigidity, and the servo cylinder 403 retracts in two stages to perform the riveting action. The displacement sensor 7 and the tension / compression sensor 404 monitor the riveting position and pressure value in real time. After the riveting is in place, the servo cylinder 403 advances forward 0.1mm to release the lock. Subsequently, the servo motor drives the advance / retract synchronous wheel 406 to rotate the advance / retract coaxial screw 405, realizing a synchronous retraction action that precisely matches the thread pitch of the plug. Finally, all cylinders reset to complete the entire riveting process. The entire process is controlled by a PLC via an EtherCAT bus, collecting data in real time and uploading it to the MES system to achieve high-precision, multi-station, traceable automated cavity sealing. Beneficial Effects This invention provides a multi-station, cavity-sealed core-pulling riveting device. It offers the following advantages: 1. A hollow rotating platform enables multi-station switching, allowing for the riveting of multiple plug positions in a single clamping operation, significantly improving production efficiency. Depending on the configuration, multiple riveting mechanisms can be arranged simultaneously, achieving one-time sealing of multiple process holes. 2. Real-time data monitoring: Displacement and pressure sensors collect data throughout the process; Automatic OK / NG judgment: The system automatically determines the riveting quality; MES system integration: Data is uploaded in real time, enabling traceability of the production process; Defective product control: The equipment automatically stops and alarms when an NG is detected, preventing defective products from leaving the site. 3. Automated operation reduces manual labor requirements and reliance on highly skilled workers; improves yield and reduces scrap loss; Modular design facilitates maintenance and upkeep. (See attached drawings) Figure 1 This is a front view of a multi-station cavity-enclosed core-pulling and riveting device proposed in this invention; Figure 2 This is a top view of a multi-station cavity-enclosed core-pulling and riveting device proposed in this invention; Figure 3 This is a schematic diagram of the riveting mechanism structure of a multi-station cavity-enclosed core-pulling riveting device proposed in this invention; Figure 4 This invention provides a multi-station, cavity-enclosed core-pulling and riveting device. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the special fixture structure of a multi-station cavity-enclosed core-pulling and riveting device proposed in this invention; Figure 6 This invention provides a multi-station, cavity-enclosed core-pulling and riveting device. Figure 5 Enlarged view of section B in the middle.

[0015] The components include: 1. Frame; 2. XY-axis moving slide; 3. Hollow rotary platform; 4. Riveting mechanism; 401. Riveting lifting cylinder; 402. Riveting locking limit cylinder; 403. Servo electric cylinder; 404. Tension / compression sensor; 405. Forward / backward coaxial screw; 406. Forward / backward toothed synchronous pulley; 407. Proximity sensor; 5. Special fixture; 6. Human-machine interface; 7. Displacement sensor. Detailed implementation method. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0016] like Figure 1-6 As shown, this embodiment of the invention provides a multi-station cavity-closed core-pulling riveting device, including a frame 1; an XY-axis moving slide 2, the XY-axis moving slide 2 being mounted on the frame 1; and a hollow rotating platform 3, the hollow rotating platform 3 being mounted on the XY-axis moving slide 2, with at least one riveting mechanism 4 arranged circumferentially around the hollow rotating platform 3; a special clamp 5 is installed on the table surface of the hollow rotating platform 3 for clamping the product body; the riveting mechanism 4 includes a lifting drive component, a locking limit component, and a riveting execution component, for sealing the process holes on the product by riveting.

[0017] The XY-axis moving slide 2 is driven by a servo motor and controlled via EtherCAT bus; the hollow rotary platform 3 is driven by a servo motor and controlled via EtherCAT bus, achieving motion coordination control with the XY-axis moving slide 2; the special clamp 5 uses a 90° angled rotary cylinder for clamping, with the cylinder arranged at a 90° angle, its pressure arm rotating 90 degrees between open and closed states to achieve multi-directional rapid clamping of the product body; the riveting mechanism 4 includes: a riveting lifting cylinder 401, used to drive the entire riveting mechanism 4 to move up and down; a riveting locking limit cylinder 402, used to lock and fix the riveting mechanism 4; a servo electric cylinder 403, which serves as the riveting power source; and a tension / compression sensor 404, installed at the output end of the servo electric cylinder 403 to monitor the riveting process in real time. The riveting mechanism 4 includes: a tension value during the process; a forward / reverse coaxial screw 405 connected to the output end of a servo cylinder 403; a forward / reverse tooth synchronous pulley 406 mounted on the forward / reverse coaxial screw 405 and driven by a forward / reverse drive servo motor; a proximity sensor 407 used to detect whether the riveting mechanism 4 is in position; the forward / reverse tooth synchronous pulley 406 meshes with the forward / reverse coaxial screw 405 for transmission; the forward / reverse drive servo motor drives the forward / reverse tooth synchronous pulley 406 to rotate via a synchronous belt, thereby driving the forward / reverse coaxial screw 405 to perform the retraction action; a displacement sensor 7; a pressure sensor; a human-machine interface 6; and a PLC controller. The displacement sensor 7 is used to detect the installation status of the plug; the pressure sensor is used to monitor the pressure value during the riveting process; and the PLC controller is connected to each servo motor via an EtherCAT bus and communicates with the company's MES system.

[0018] The riveting mechanism 4 is either a vertical lifting riveting mechanism 4 or a horizontal fixed riveting mechanism 4. The repeatability of the hollow rotating platform 3 is ±5arc-sec, and the positioning accuracy is ≤15arc-min.

[0019] The multi-station closed-cavity core-pulling riveting method includes the following steps: S1: Place the product body into the special clamp 5 on the hollow rotating platform 3, clamp the product by rotating cylinder, and install the plug at the riveting station at the same time. S2: The products are transported sequentially to each riveting station via the XY axis moving slide 2 and the hollow rotating platform 3; S3: At each workstation, the riveting mechanism 4 performs riveting actions, including positioning and locking, two-stage riveting, unlocking, synchronous tooth removal, and reset. S4: Collect displacement and pressure data in real time, determine the quality of riveting, and upload the data to the MES system.

[0020] Step S3 specifically includes: S3.1: The rivet lifting cylinder 401 descends to the position, and the rivet locking limit cylinder 402 extends the locking mechanism; S3.2: The servo electric cylinder 403 retracts for the first time, performing the first stage of riveting, breaking the plug, and the pressure sensor detects the pressure value; S3.3: After the pressure reaches the target, the servo electric cylinder 403 retracts for the second time, performing the second stage of riveting into place; S3.4: The displacement sensor 7 and the pressure sensor work together to detect and determine whether the riveting position and pressure are within the preset range; S3.5: Servo electric cylinder 403 advances forward by 0.1mm, releasing the locked state; S3.6: The forward and backward drive servo motor drives the forward and backward synchronous wheel to rotate, which in turn drives the forward and backward coaxial screw 405 to rotate, thereby realizing the unwinding action; S3.7: After the riveting is completed, the riveting locking limit cylinder 402 retracts, and the riveting lifting cylinder 401 rises to reset.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station cavity-closed core-pulling riveting device, comprising a frame (1); an XY-axis moving slide (2), wherein the XY-axis moving slide (2) is mounted on the frame (1); Its features are, Also includes: Hollow rotating platform (3), the hollow rotating platform (3) is set on the XY axis moving slide (2), and at least one riveting mechanism (4) is arranged around the hollow rotating platform (3) in the circumferential direction. The hollow rotating platform (3) is equipped with a special clamp (5) for clamping the product body; The riveting mechanism (4) includes a lifting drive assembly, a locking limit assembly, and a riveting execution assembly, which are used to plug and seal the process holes on the product.

2. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: The XY-axis moving slide (2) is driven by a servo motor and controlled by an EtherCAT bus; the hollow rotating platform (3) is driven by a servo motor and controlled by an EtherCAT bus, realizing motion coordination control with the XY-axis moving slide (2).

3. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: The special clamp (5) is clamped by a 90° angled rotary cylinder. The rotary cylinder is arranged at a 90° angle, and its pressure arm rotates 90 degrees between the open and closed states to achieve multi-directional rapid clamping of the product body.

4. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: The riveting mechanism (4) includes: Riveting lifting cylinder (401): The riveting lifting cylinder (401) is used to drive the entire riveting mechanism (4) to move up and down; Riveting locking limit cylinder (402): The riveting locking limit cylinder (402) is used to lock and fix the riveting mechanism (4); Servo electric cylinder (403): The servo electric cylinder (403) serves as a power source for riveting; Tension / compression sensor (404): The tension / compression sensor (404) is installed at the output end of the servo electric cylinder (403) to monitor the tension value in real time during the riveting process; Forward and backward coaxial screw (405): The forward and backward coaxial screw (405) is connected to the output end of the servo electric cylinder (403); Advance and retraction synchronous gear (406): The advance and retraction synchronous gear (406) is sleeved on the advance and retraction coaxial screw (405) and is driven by the advance and retraction drive servo motor; Proximity sensor (407): The proximity sensor (407) is used to detect whether the riveting mechanism (4) is in position.

5. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: The tooth advance and retraction synchronous pulley (406) meshes with the tooth advance and retraction coaxial screw (405) for transmission. The tooth advance and retraction drive servo motor drives the tooth advance and retraction synchronous pulley (406) to rotate through the synchronous belt, thereby driving the tooth advance and retraction coaxial screw (405) to perform the tooth retraction action.

6. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: It also includes a displacement sensor (7), a pressure sensor, a human-machine interface (6), and a PLC controller; the displacement sensor (7) is used to detect the installation status of the plug; the pressure sensor is used to monitor the pressure value during the riveting process; the PLC controller is connected to each servo motor via the EtherCAT bus and communicates with the company's MES system.

7. The multi-station cavity-enclosed core-pulling and riveting device according to claim 1, characterized in that: The riveting mechanism (4) is either a vertical lifting riveting mechanism (4) or a horizontal fixed riveting mechanism (4).

8. The multi-station cavity-enclosed core-pulling riveting device according to claim 1, characterized in that: The repeatability of the hollow rotating platform (3) is ±5arc-sec, and the positioning accuracy is ≤15arc-min.

9. A multi-station cavity-closed core-pulling riveting method based on the device according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the product body into the special fixture (5) on the hollow rotating platform (3), clamp the product by rotating cylinder, and install the plug at the riveting station at the same time; S2: The products are transported sequentially to each riveting station by moving the XY axis slide (2) and the hollow rotary platform (3); S3: At each workstation, the riveting mechanism (4) performs riveting actions, including positioning and locking, two-stage riveting, unlocking, synchronous tooth removal and reset; S4: Collect displacement and pressure data in real time, determine the quality of riveting, and upload the data to the MES system.

10. The multi-station cavity closed-type core-pulling riveting method according to claim 9, characterized in that, Step S3 specifically includes: S3.1: The rivet lifting cylinder (401) descends to the position, and the rivet locking limit cylinder (402) extends the locking mechanism; S3.2: The servo electric cylinder (403) retracts for the first time, performs the first stage of riveting, breaks the plug, and the pressure sensor detects the pressure value; S3.3: After the pressure reaches the target, the servo electric cylinder (403) retracts for the second time, performing the second stage of riveting into place; S3.4: The displacement sensor (7) and the pressure sensor work together to detect and determine whether the riveting position and pressure are within the preset range; S3.5: The servo electric cylinder (403) moves forward 0.1mm, releasing the locked state; S3.6: The forward and backward drive servo motor drives the forward and backward synchronous wheel to rotate, which in turn drives the forward and backward coaxial screw (405) to rotate, thereby realizing the tooth unwinding action; S3.7: After the riveting is completed, the riveting locking limit cylinder (402) retracts and the riveting lifting cylinder (401) rises to reset.

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