Automatic nut positioning and delivering equipment for riveting die

Abstract

The invention discloses automatic nut positioning and delivering equipment for a riveting die. A lower die, a feeding vibration disc, a control box and an electromagnetic valve are borne on a base. The lower die is matched with the upper die, the lower die further bears an aluminum plate and fastens a guide channel, a positioning mechanism is arranged in the guide channel, and the positioning mechanism comprises a guide air cylinder controlled through an electromagnetic valve and a sliding unit connected to the output end of the guide air cylinder. A discharge port of a slide way arranged on the feeding vibration disc corresponds to an initial material receiving position of the positioning mechanism; a traditional manual nut placing mode can be fundamentally replaced, and the production efficiency and rhythm consistency are remarkably improved; through combination of mechanical detection and electrical detection, the accuracy of the nuts conveyed to the riveting station is ensured, and the product quality stability is greatly improved; the equipment is compact in overall structure, can be directly integrated with an existing stamping die, is low in transformation cost and safe and reliable in operation, and effectively reduces the labor intensity and potential safety hazards of operators.

Description

Technical Field

[0001] This invention relates to nut riveting equipment, and more particularly to an automatic nut positioning and delivery device for riveting dies. Background Technology

[0002] In the machining of sheet metal structural components, especially aluminum parts, riveting nuts to the sheet metal is a common connection technique. Traditional machining methods still largely rely on manual assistance.

[0003] Specifically, the operator needs to manually place each nut one by one into a special positioning fixture or carrier, and then push the fixture containing the nuts into the designated area of ​​the lower die of the stamping die. After that, the press starts a single stamping stroke, and the upper die moves downward to press the nuts in the fixture into the pre-placed holes in the aluminum plate.

[0004] This model has several significant drawbacks: Firstly, the production efficiency is extremely low, with each work cycle heavily reliant on manual handling and shifting speed, which cannot match the pace of modern automated stamping production. Secondly, the high intensity of labor for workers and the long-term repetitive and monotonous operation can easily lead to fatigue, which in turn affects the placement accuracy. Third, the production cycle and consistency depend entirely on the operator's personal condition, resulting in poor product quality stability.

[0005] Furthermore, there are certain safety hazards in manually pushing the tooling into the mold. Therefore, there has been a long-standing need in the field for a solution that can be easily and directly integrated with existing stamping dies to achieve automatic nut feeding and precise positioning, thereby completely replacing the inefficient manual operation mode and realizing full automation and high efficiency in the riveting process. Summary of the Invention

[0006] To address the shortcomings of the aforementioned technologies, this invention provides an automatic nut positioning and delivery device for riveting molds.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is: an automatic nut positioning and delivery device for riveting molds, including a base, on which a lower mold, a feeding vibratory plate, a control box and a solenoid valve are supported; The lower mold is equipped with an upper mold located directly above it. The lower mold is also used to support the aluminum plate and fasten the guide channel. The guide channel is equipped with a positioning mechanism that can reciprocate along its guide trajectory. The positioning mechanism includes a guide cylinder controlled by a solenoid valve and a sliding unit connected to the output end of the guide cylinder to reciprocate and carry the nut to be processed to be aligned with the aluminum plate. The discharge port of the slide rail on the feeding vibratory feeder corresponds to the initial receiving position of the positioning mechanism.

[0008] Furthermore, the positioning mechanism also includes a guide slider, a positioning block, a positioning post, and a positioning plate; The guide slider is slidably set in the guide channel and connected to the guide cylinder through a floating joint; the positioning block is fastened to the guide slider in a matching manner, and the positioning column is vertically fastened to the positioning block.

[0009] Furthermore, the positioning plate is mounted above the guide slider by at least one set of springs, and the positioning plate is also provided with through holes for the positioning pin to pass through, so that the positioning plate can elastically float up and down relative to the positioning pin.

[0010] Furthermore, a spring elastically supports the space between the positioning block and the positioning plate. A screw is installed inside the spring, with the lower end of the screw fixedly connected to the positioning block and the upper end passing through the positioning plate.

[0011] Furthermore, a baffle plate is fixedly connected to the positioning plate. When the positioning mechanism moves from the initial receiving position along the guide channel towards the aluminum plate, the baffle plate moves synchronously to close the discharge port of the slide.

[0012] Furthermore, a limit stop is provided at the end of the guide channel, and a buffer is also provided on the limit stop. The buffer is used to buffer the sliding unit that moves to the end of the guide channel.

[0013] Furthermore, the control box is electrically connected to the feeding vibratory feeder, the guide cylinder, and the proximity switch installed on the guide channel; The control box is configured to control the guide cylinder to push the positioning mechanism to the riveting station of the aluminum plate when the proximity switch detects the nut in place signal; when the control box receives the stamping completion signal, it controls the guide cylinder to pull the positioning mechanism back to the initial receiving position.

[0014] Furthermore, a proximity switch is positioned directly above the initial receiving position of the positioning mechanism to detect whether the nut on the positioning post is in place.

[0015] An automatic nut positioning and delivery device for riveting dies integrates automatic feeding, precise positioning, and stamping control to achieve fully automated operation of the nut riveting process. It can fundamentally replace the traditional manual nut placement method, significantly improving production efficiency and rhythm consistency. Through the combination of mechanical and electrical detection, it ensures the accuracy of nut delivery to the riveting station, greatly improving product quality stability. The device has a compact overall structure and can be directly integrated with existing stamping dies, resulting in low modification costs and safe and reliable operation, effectively reducing the labor intensity and safety hazards of operators. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the assembly of the positioning mechanism and guide channel of the present invention. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the assembly of the positioning mechanism and guide channel of the present invention. Figure 2 .

[0019] In the diagram: 1. Base; 2. Lower mold; 3. Upper mold; 4. Aluminum plate; 5. Feeding vibratory feeder; 6. Control box; 7. Solenoid valve; 8. Positioning mechanism; 9. Guide channel; 10. Slide rail; 11. Guide cylinder; 12. Floating joint; 13. Guide slider; 14. Positioning block; 15. Positioning post; 16. Spring; 17. Screw; 18. Positioning plate; 19. Through hole; 20. Screw hole; 21. Baffle plate; 22. Limit stop; 23. Buffer; 24. Proximity switch. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-3 As shown in the figure, this embodiment of the automatic nut positioning and delivery device for riveting mold includes a base 1 as the mounting base, a lower die 2 of the stamping mold is provided on the base 1, an upper die 3 is provided directly above the lower die 2, and the aluminum plate 4 to be processed is placed on the forming surface of the lower die 2; this embodiment also includes a feeding vibratory plate 5, a control box 6 and a solenoid valve 7 for controlling pneumatic components installed on the base 1.

[0022] To achieve automatic and precise transfer of the nut to the riveting position on the aluminum plate 4, this embodiment divides the forming table of the lower mold 2 and sets a guide channel 9 within the divided space. A positioning mechanism 8 is slidably arranged in the guide channel 9. The positioning mechanism 8 can reciprocate along the trajectory set by the guide channel 9. The overall movement of the positioning mechanism 8 is driven by the guide cylinder 11. The guide cylinder 11 receives the air source signal through the solenoid valve 7. The output end of the guide cylinder 11 is connected to the sliding unit through the floating joint 12. This connection method helps to compensate for possible coaxiality deviations and ensures smooth movement.

[0023] The feeding vibratory plate 5 is a conventional circular vibrator. The feeding vibratory plate 5 is responsible for arranging the scattered nuts in an orderly manner and outputting them. The outlet of the feeding vibratory plate 5 is connected to a slide 10. The discharge port at the end of the slide 10 is set at a position corresponding to the initial receiving position of the positioning mechanism 8, thereby ensuring that the nuts can be accurately delivered to the positioning mechanism 8 for bearing.

[0024] The sliding unit of the positioning mechanism 8 includes a guide slider 13 that slides in the guide channel 9. The guide slider 13 is connected to the guide cylinder 11 through the floating joint 12 mentioned above. Positioning blocks 14 are installed on the guide slider 13 in a hollowed-out or block-shaped manner. In this embodiment, there are two positioning blocks 14, and positioning posts 15 are vertically and tightly fixed on the two positioning blocks 14 respectively.

[0025] Based on the above structure, a positioning plate 18 is provided above the positioning block 14 and connected by at least one set of springs 16. Preferably, the positioning plate 18 has a through hole 19, through which the positioning post 15 can pass upward through the through hole 19. In conjunction with this, the spring 16 is compressed between the positioning block 14 and the positioning plate 18, thereby providing a continuous upward elastic support force for the positioning plate 18. In other words, when the positioning plate 18 compresses the spring 16 downward, the positioning post 15 can pass through the through hole 19. Furthermore, a screw 17 is provided inside the spring 16. The lower end of the screw 17 is fixedly connected to the positioning block 14, and the upper end of the screw 17 passes through the positioning plate 18. This allows the positioning plate 18 to elastically float up and down relative to the fixed positioning post 15. Needless to say, a screw hole 20 is provided at the position where the screw 17 passes through the positioning plate 18. In practical applications, when the upper die 3 presses down, the pressure first acts on the positioning plate 18, causing it to overcome the elastic force of the spring 16 and move downward, thereby exposing the nut supported at the top of the positioning post 15 so that the upper die 3 can press it into the aluminum plate 4 to complete the riveting. After the stamping is completed, the positioning plate 18 can return to its initial height under the reset action of the spring 16.

[0026] In this embodiment, a baffle plate 21 is fixedly connected to the rear end of the positioning plate 18 in the forward direction. The baffle plate 21 is configured to move synchronously when the guide cylinder 11 pushes the entire sliding unit away from the initial receiving position and moves along the guide channel 9 towards the aluminum plate 4. During this process, the baffle plate 21 moves exactly to the outlet position of the slide 10 and closes it, thereby effectively preventing the subsequent nut from accidentally falling out of the vibratory plate after the positioning mechanism 8 leaves, ensuring the safety of the operation process.

[0027] In order to accurately control the end position of the sliding unit of the positioning mechanism 8, a limit stop 22 is provided at the end of the guide channel 9 in this embodiment. In addition, a buffer 23 is also provided. When the guide slider 13 of the positioning mechanism 8 moves to the end and is about to contact the limit stop 22, the buffer 23 will contact it first and provide damping buffer to prevent the positioning mechanism 8 from vibrating or rebounding due to hard impact, thereby ensuring that the nut position is accurate and perfectly aligned with the pre-made hole on the aluminum plate 4.

[0028] The automatic control logic in this embodiment is controlled by the control box 6. The control box 6 is electrically connected to the feeding vibratory plate 5, the guide cylinder 11 and the proximity switch 24. It should be noted that the proximity switch 24 is installed directly above the initial receiving position of the positioning mechanism 8 and is used for non-contact detection of whether the nut on the positioning column 15 has been delivered to the correct position.

[0029] The general workflow of this embodiment is as follows: After the equipment is started, the feeding vibratory plate 5 works to send the nut to the positioning column 15. When the nut is in place, the proximity switch 24 detects the signal and sends it to the control box 6. The control box 6 then instructs the solenoid valve 7 to drive the guide cylinder 11 to extend, pushing the sliding unit of the positioning mechanism 8 carrying the nut to the riveting station of the lower mold 2, and precisely positioned by the limit block 22 and the buffer 23. At this time, the external robotic arm can put the aluminum plate 4 into the lower die 2, the punch press starts a single stroke, and the upper die 3 moves down to complete the riveting; after the stamping action is completed, the punch press or die will send a stamping completion signal to the control box 6, and the control box 6 will then control the guide cylinder 11 to retract, pull the sliding unit back to the initial receiving position, and at the same time the baffle plate 21 also leaves, reopening the discharge port of the slide 10 and starting the next automated cycle.

[0030] If the proximity switch 24 fails to detect the nut in place within the set time, the control box 6 can determine that there is a material shortage and trigger an alarm or shutdown, prompting the operator to intervene.

[0031] This application discloses an automatic nut positioning and delivery device for riveting dies, which integrates automatic feeding, precise positioning, and stamping control to achieve fully automated operation of the nut riveting process. It can fundamentally replace the traditional manual nut placement method, significantly improving production efficiency and rhythm consistency. Through the combination of mechanical and electrical detection, it ensures the accuracy of nut delivery to the riveting station, greatly improving product quality stability. The overall structure of this device is compact and can be directly integrated with existing stamping dies. It has low modification costs and safe and reliable operation, effectively reducing the labor intensity and safety hazards of operators.

[0032] The above embodiments are not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention.

Claims

1. An automatic nut positioning and delivery device for riveting molds, comprising a base (1), characterized in that: The base (1) supports the lower mold (2), the feeding vibratory plate (5), the control box (6) and the solenoid valve (7). The lower mold (2) is equipped with an upper mold (3) located directly above it. The lower mold (2) is also implemented in the manner of receiving the aluminum plate (4) and fastening the guide channel (9). The guide channel (9) is provided with a positioning mechanism (8) that can reciprocate along its guide trajectory. The positioning mechanism (8) includes a guide cylinder (11) controlled by a solenoid valve (7) and a sliding unit connected to the output end of the guide cylinder (11) to reciprocate and carry the nut to be processed to be aligned with the aluminum plate (4). The discharge port of the slide (10) on the feeding vibratory plate (5) corresponds to the initial receiving position of the positioning mechanism (8).

2. The automatic nut positioning and delivery device for riveting molds according to claim 1, characterized in that: The positioning mechanism (8) further includes a guide slider (13), a positioning block (14), a positioning post (15), and a positioning plate (18). The guide slider (13) is slidably disposed in the guide channel (9) and connected to the guide cylinder (11) through the floating joint (12); the positioning block (14) is fastened to the guide slider (13) in a matching manner, and the positioning column (15) is vertically fastened to the positioning block (14).

3. The automatic nut positioning and delivery device for riveting molds according to claim 2, characterized in that: The positioning plate (18) is mounted above the guide slider (13) by at least one set of springs (16). The positioning plate (18) is also provided with a through hole (19) for the positioning post (15) to pass through, so that the positioning plate (18) can elastically float up and down relative to the positioning post (15).

4. The automatic nut positioning and delivery device for riveting molds according to claim 3, characterized in that: The spring (16) is elastically supported between the positioning block (14) and the positioning plate (18). A screw (17) is provided inside the spring (16). The lower end of the screw (17) is fixedly connected to the positioning block (14), and the upper end passes through the positioning plate (18).

5. The automatic nut positioning and delivery device for riveting molds according to claim 3, characterized in that: A baffle plate (21) is fixedly connected to the positioning plate (18). When the positioning mechanism (8) moves from the initial receiving position along the guide channel (9) toward the aluminum plate (4), the baffle plate (21) moves synchronously to close the outlet of the slide (10).

6. The automatic nut positioning and delivery device for riveting molds according to claim 2, characterized in that: The end of the guide channel (9) is provided with a limiting block (22), and the limiting block (22) is also provided with a buffer (23). The buffer (23) is used to buffer the sliding unit that moves to the end of the guide channel (9).

7. The automatic nut positioning and delivery device for riveting molds according to claim 1, characterized in that: The control box (6) is electrically connected to the feeding vibratory plate (5), the guide cylinder (11), and the proximity switch (24) set on the guide channel (9); The control box (6) is configured to control the guide cylinder (11) to push the positioning mechanism (8) to the riveting station of the aluminum plate (4) after the proximity switch (24) detects the nut in place signal; and to control the guide cylinder (11) to pull the positioning mechanism (8) back to the initial receiving position after the control box (6) receives the stamping completion signal.

8. The automatic nut positioning and delivery device for riveting molds according to claim 7, characterized in that: The proximity switch (24) is positioned directly above the initial receiving position of the positioning mechanism (8) to detect whether the nut on the positioning post (15) is in place.

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