Pneumatic feeding device for aluminum strip
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEBEI JINHUAN PACKAGING
- Filing Date
- 2025-11-20
- Publication Date
- 2026-06-23
Smart Images
Figure CN121198949B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a feeding device for stamping equipment, specifically a pneumatic feeding device for aluminum strip used in stamping. Background Technology
[0002] The structure of an aluminum-plastic cap consists of an aluminum cap and a plastic cap. During the production process, a stamping device is used to stamp the aluminum strip to obtain the cap. The aluminum strip is driven into the stamping device by a feeding device. The movement of the aluminum strip needs to be coordinated with the movement of the stamping die. When the downward-moving punch contacts the aluminum strip, the strip needs to be stationary. After the punch moves upward and leaves the strip, it needs to be conveyed forward a certain distance to facilitate the next stamping.
[0003] To ensure the accuracy of aluminum strip movement, the current feeding device uses a servo motor that drives two sets of gears at the edges of the aluminum strip to rotate intermittently via a transmission mechanism. Each set includes upper and lower gears, with the aluminum strip positioned between them. The gear teeth contact the surface of the aluminum strip, and the gears drive the aluminum strip to move intermittently. To ensure synchronization between the gears and the aluminum strip movement at high speeds, the gears apply pressure to the aluminum strip surface to increase friction. This causes the gear teeth to leave indentations on the aluminum strip surface, which may affect the appearance quality of the aluminum-plastic cap product after subsequent processing. Currently, there are also devices that use a servo motor to drive a roller, which in contact with the aluminum strip surface to drive the intermittent movement of the aluminum strip. However, because the stamping speed of aluminum caps is very high, requiring rapid and repeated movements and stops of the aluminum strip, and the roller only has line contact with the aluminum strip surface, it cannot provide sufficient friction, resulting in poor displacement accuracy of the aluminum strip. Accumulated errors can affect the normal operation of the stamping process.
[0004] Therefore, there is an urgent need for a feeding device that can achieve high-speed and accurate feeding of aluminum strips without damaging the surface of the aluminum strips. Summary of the Invention
[0005] The purpose of this invention is to provide a pneumatic feeding device for aluminum strip in stamping, so as to solve the problems that existing feeding devices cannot guarantee the displacement accuracy of aluminum strip in high-speed intermittent movement and cause damage to the surface of aluminum strip.
[0006] The present invention is implemented as follows: a pneumatic feeding device for aluminum strip for stamping includes a frame and a slider. The frame and the slider are connected by a horizontal telescopic cylinder. A first vertical telescopic cylinder is provided on the frame, and a front pressure plate is provided at the upper end of the first vertical telescopic cylinder. A second vertical telescopic cylinder is provided on the slider, and a rear pressure plate is provided at the upper end of the second vertical telescopic cylinder.
[0007] An air source connection port is provided on the frame, and an internal air passage communicating with the air source connection port is provided inside the frame. The horizontal telescopic cylinder and the first vertical telescopic cylinder are controlled and connected to the internal air passage of the frame. An internal air passage is provided inside the slider, and the second vertical telescopic cylinder is controlled and connected to the internal air passage of the slider. The horizontal telescopic cylinder has a hollow structure. The internal air passage of the frame and the internal air passage of the slider are interconnected through the horizontal telescopic cylinder. A reversing pressure rod is provided on the frame and connected to the internal air passage of the frame. The punch press moves down and presses down the reversing pressure rod. The reversing pressure rod controls the action of the horizontal telescopic cylinder, the first vertical telescopic cylinder, and the second vertical telescopic cylinder through the internal air passage of the frame.
[0008] Furthermore, the horizontal telescopic cylinder includes a first cylinder body, a hollow guide rod is disposed inside the first cylinder body, a hollow telescopic rod is sleeved on the hollow guide rod, the front end of the hollow guide rod is fixed to the first cylinder body and communicates with a first communication port, the front end of the hollow telescopic rod is provided with a first piston that contacts the inner wall of the first cylinder body, the rear end of the hollow telescopic rod extends out of the frame and into the slider, a second communication port is provided at the front of the first cylinder body, a third communication port is provided at the rear of the first cylinder body, and a fourth communication port is provided at the rear end of the hollow telescopic rod.
[0009] The reversing lever includes a first valve body, a first valve core, and a lever. An air inlet and an air outlet are provided on the first valve body. The lever is connected to the first valve core and extends out of the valve body. The movement of the first valve core controls the connection and disconnection of the air inlet and the air outlet.
[0010] Furthermore, the internal air passages of the frame include:
[0011] A pneumatic valve includes a second valve body and a second valve core. The second valve body has a first port, a second port, a third port, and a fourth port. The first port and the second port are located at opposite ends of the second valve body and are used to control the movement of the second valve core. When the second valve core is close to the first port, the third port and the fourth port are connected to each other. When the second valve core is close to the second port, the first port and the third port are connected.
[0012] The first air passage is connected to the air source connection port, and is connected to the cavity above the piston in the first vertical telescopic cylinder, the third connection port of the first cylinder, the air inlet of the reversing pressure rod, and the first port of the pneumatic valve.
[0013] The second air passage is connected to the air outlet of the reversing pressure rod, the first connecting port, the cavity at the lower part of the piston in the first vertical telescopic cylinder, and the second port of the pneumatic valve.
[0014] The third air passage is connected to the fourth port of the pneumatic valve and has an exhaust port.
[0015] The fourth air passage is connected to the second connection port and the third port of the pneumatic valve.
[0016] Furthermore, an auxiliary frame is provided at the rear of the frame, and guide rails are provided on both sides of the frame. The two ends of the guide rails are connected to the frame and the auxiliary frame, respectively. Sliding grooves are provided on both sides of the slider, and the sliding grooves are slidably connected to the guide rails.
[0017] Furthermore, several adjustment holes are provided at the rear end of the guide rail along the length of the guide rail, and the stroke of the slider moving back and forth is adjusted by installing different adjustment holes on both sides of the auxiliary frame.
[0018] Furthermore, a limit rod and a guide wheel are provided on the auxiliary frame. The guide wheel is located on both sides of the aluminum strip to guide the aluminum strip, which is located between the upper surface of the auxiliary frame and the limit rod.
[0019] Furthermore, a first buffer cylinder is provided on the rear end face of the frame, and the first buffer cylinder is connected to the internal air passage of the frame.
[0020] Furthermore, a second buffer cylinder is provided on the rear end face of the slider. The second buffer cylinder is located at the rear end of the hollow telescopic rod and is in communication with the hollow telescopic rod.
[0021] Furthermore, the internal air passage of the slider is connected to the fourth communication port and simultaneously connected to the upper cavity of the piston inside the second vertical telescopic cylinder.
[0022] Furthermore, a third buffer cylinder is provided at the end of the pressure rod. The cylinder body and piston of the third buffer cylinder are sleeved on the pressure rod, and the inner cavity of the third buffer cylinder is connected to the air inlet through the central hole of the pressure rod.
[0023] Furthermore, pads are provided on the upper surface of the frame and the upper surface of the slider, respectively.
[0024] This invention uses compressed air as power to control the clamping and loosening of the front and rear pressure plates, as well as the forward and backward movement of the slide, through the reciprocating up and down movement of the press. This ensures that the actions of each part are perfectly matched with the stamping cycle of the press. The rear pressure plate presses the aluminum strip onto the slide, and the large contact area between the pressure plate and the aluminum strip surface provides sufficient friction, preventing relative slippage when the slide moves the aluminum strip forward, thus ensuring the displacement accuracy of the aluminum strip. Furthermore, the pressure plates do not leave indentations or scratches on the aluminum strip during clamping, ensuring the appearance quality of the aluminum strip and subsequent products.
[0025] This invention employs a specially structured horizontal telescopic cylinder, which serves as both a drive mechanism for the reciprocating movement of the slider and a part of the air circuit for transmitting compressed gas from the frame to the inside of the slider. This enables synchronous control of the cylinders on the fixed frame and the cylinders on the moving slider with only one air source interface and one reversing pressure rod. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of the slider of the present invention moving to the previous limit position.
[0027] Figure 2 This is a schematic diagram of the structure of the slider of the present invention moving to the rear limit position.
[0028] Figure 3 yes Figure 1 The corresponding gas path control diagram.
[0029] Figure 4 yes Figure 2 The corresponding gas path control diagram.
[0030] Figure 5 This is a structural diagram of the pneumatic valve of the present invention.
[0031] Figure 6 This is a structural diagram of the reversing pressure bar of the present invention.
[0032] In the diagram: 1. Frame; 2. Slider; 3. Guide rail; 4. Horizontal telescopic cylinder; 5. First vertical telescopic cylinder; 6. Front pressure plate; 7. Second vertical telescopic cylinder; 8. Rear pressure plate; 9. Reversing pressure rod; 10. Auxiliary frame; 11. Limiting rod; 12. Guide wheel; 13. Aluminum strip; 14. Air source connection port; 15. Pneumatic valve; 16. Exhaust port; 17. First air passage; 18. Second air passage; 19. Third air passage; 20. First buffer cylinder; 21. Second buffer cylinder; 22. Third buffer cylinder; 23. Fourth air passage;
[0033] 3-1. Adjustment hole;
[0034] 4-1, First cylinder block; 4-2, Hollow guide rod; 4-3, Hollow telescopic rod; 4-4, First connecting port; 4-5, Second connecting port; 4-6, Third connecting port; 4-7, Fourth connecting port; 4-8, First piston;
[0035] 9-1, First valve body; 9-2, First valve core; 9-3, Pressure rod; 9-4, Air inlet; 9-5, Air outlet;
[0036] 15-1, Second valve body; 15-2, Second valve core; 15-3, First port; 15-4, Second port; 15-5, Third port; 15-6, Fourth port. Detailed Implementation
[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.
[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0039] like Figure 1 , Figure 2 As shown, the pneumatic feeding device for aluminum strip in stamping of the present invention mainly includes a frame 1 and a slider 2. A horizontal telescopic cylinder 4 is fixedly installed inside the frame 1. The rear end of the horizontal telescopic rod extends out of the frame 1 and is connected to the slider 2. The extension and retraction of the horizontal telescopic rod drives the slider 2 to move closer to and away from the frame 1, realizing the reciprocating movement of the slider 2. Two first vertical telescopic cylinders 5 are provided inside the frame 1. The cylinder shafts of the two first vertical telescopic cylinders 5 extend out of the upper surface of the frame 1, and there is a certain gap between the cylinder shafts of the two first vertical telescopic cylinders 5 for the passage of aluminum strip 13. A front pressure plate 6 is connected to the upper end of the cylinder shafts of the two first vertical telescopic cylinders 5. The first vertical telescopic cylinders 5 drive the front pressure plate 6 to move up and down, thereby pressing the aluminum strip 13 onto the upper surface of the frame 1 or releasing the aluminum strip 13. Two second vertical telescopic cylinders 7 are provided inside the slider 2. The cylinder shafts of the two second vertical telescopic cylinders 7 extend beyond the upper surface of the slider 2, and there is a certain gap between the cylinder shafts of the two second vertical telescopic cylinders 7 for the passage of aluminum strip 13. A rear pressure plate 8 is connected to the upper end of the cylinder shafts of the two second vertical telescopic cylinders 7. The rear pressure plate 8 is driven to move up and down by the second vertical telescopic cylinders 7 to press the aluminum strip 13 onto the upper surface of the slider 2 or to release the aluminum strip 13.
[0040] By coordinating the actions of the horizontal telescopic cylinder 4, the first vertical telescopic cylinder 5, and the second vertical telescopic cylinder 7, the following actions can be achieved: the front pressure plate 6 presses the aluminum strip 13, the rear pressure plate 8 releases the aluminum strip 13, and the slider 2 moves backward; after the slider 2 moves to its rear limit position, the front pressure plate 6 releases the aluminum strip 13, the rear pressure plate 8 presses the aluminum strip 13, and the slider 2 moves forward, driving the aluminum strip 13 to move forward synchronously. Repeating the above actions can achieve intermittent feeding of the aluminum strip 13. Through the surface contact between the pressure plate and the aluminum strip 13, indentations on the aluminum strip 13 can be effectively avoided.
[0041] Flexible pads are provided on the upper surface of the frame 1, the upper surface of the slider 2, the front pressure plate 6, and the rear pressure plate 8, respectively. This can further prevent indentations or scratches on the surface of the aluminum strip 13, and increase the friction between the aluminum strip 13 and the pads, thereby improving the accuracy of the movement of the aluminum strip 13. The flexible pads can be made of rubber.
[0042] Meanwhile, this invention employs a pneumatic drive system and a method that coordinates the reversing pressure rod 9 with the reciprocating motion of the punch press. The pneumatic source is a supporting facility in the aluminum-plastic cap stamping production workshop, and it is needed in multiple stages of the workshop. This invention uses a pneumatic drive system, which can improve the utilization rate of the pneumatic source. By pressing or releasing the reversing pressure rod 9 through the reciprocating motion of the punch press, the actions of the horizontal telescopic cylinder 4, the first vertical telescopic cylinder 5, and the second vertical telescopic cylinder 7 are controlled. This allows the feeding action of the aluminum strip 13 to be perfectly matched with the action rhythm of the punch press, eliminating the need to adjust the action rhythm of the feeding device according to the speed of the punch press.
[0043] like Figure 3 , Figure 4 As shown, the present invention has an air source connection port 14 on the frame 1, which is connected to a high-pressure air source through a pipeline. An internal air passage, communicating with the air source connection port 14, is also provided inside the frame 1. A horizontal telescopic cylinder 4 and a first vertical telescopic cylinder 5 are connected to the internal air passage of the frame 1 and their movements are controlled by the internal air passage. A reversing pressure rod 9, connected to the internal air passage, is also provided on the frame 1. An internal air passage is provided inside the slider 2, and a second vertical telescopic cylinder 7 is connected to the internal air passage of the slider 2 and its movements are controlled by the internal air passage. Since the slider 2 moves reciprocally, and the reversing pressure rod 9 is located on the frame 1, it is necessary to control the gas flow direction in both the internal air passage of the frame 1 and the internal air passage of the slider 2 simultaneously through a single reversing pressure rod 9. The present invention employs a specially hollow horizontal telescopic cylinder 4, which serves as both the driving mechanism for the reciprocating movement of the slider 2 and a gas transmission channel connecting the internal air passage of the frame 1 and the internal air passage of the slider 2. The punch press moves down and presses down the reversing lever 9. The punch press moves up and releases the reversing lever 9. The reversing lever 9 controls the horizontal telescopic cylinder 4, the first vertical telescopic cylinder 5, and the second vertical telescopic cylinder 7 through the internal air circuit of the frame 1.
[0044] Specifically, the horizontal telescopic cylinder 4 includes a first cylinder body 4-1, which is fixedly installed inside the frame 1. A hollow guide rod 4-2 is provided inside the first cylinder body 4-1, and the hollow guide rod 4-2 is coaxially arranged with the first cylinder body 4-1. A hollow telescopic rod 4-3 is sleeved on the hollow guide rod 4-2, and the hollow telescopic rod 4-3 can slide along the hollow guide rod 4-2. The outer wall of the hollow guide rod 4-2 and the inner wall of the hollow telescopic rod 4-3 are sealed together. A first piston 4-8 is fixedly installed at the front end of the hollow telescopic rod 4-3. The first piston 4-8 is in sealed contact with the inner wall of the first cylinder body 4-1. When the first piston 4-8 moves, it can drive the hollow telescopic rod 4-3 to move together. The front end of the hollow guide rod 4-2 is fixed, and a first connecting port 4-4 is provided at the front end of the hollow guide rod 4-2 for introducing gas into the inner cavity of the hollow guide rod 4-2. The rear end opening of the hollow guide rod 4-2 is connected to the inner cavity of the hollow telescopic rod 4-3. A second connecting port 4-5 is provided at the front of the first cylinder 4-1, and the second connecting port 4-5 is connected to the cavity at the front of the first piston 4-8; a third connecting port 4-6 is provided at the rear of the first cylinder 4-1, and the third connecting port 4-6 is connected to the cavity at the rear of the first piston 4-8. The rear end of the hollow telescopic rod 4-3 extends out of the frame 1 and into the interior of the slider 2. A fourth connecting port 4-7 is provided at the rear end of the hollow telescopic rod 4-3, and the fourth connecting port 4-7 is connected to the internal air passage of the slider 2.
[0045] like Figure 6 As shown, the reversing lever 9 includes a first valve body 9-1, a first valve core 9-2, and a lever 9-3. The first valve body 9-1 has an air inlet 9-4 and an air outlet 9-5. The first valve core 9-2 is located inside the first valve body 9-1. The lever 9-3 is connected to the first valve core 9-2 and extends outside the first valve body 9-1. The lever 9-3 and the first valve body 9-1 are slidably sealed together. Under the action of external force from the punch press, the lever 9-3 drives the first valve core 9-2 to move, disconnecting the air inlet 9-4 and the air outlet 9-5. When the punch press moves upward, the first valve core 9-2 resets under air pressure, connecting the air inlet 9-4 and the air outlet 9-5. The first valve core 9-2 moves to control the connection and disconnection of the air inlet 9-4 and the air outlet 9-5. The connection and disconnection of the air inlet 9-4 and the air outlet 9-5 further control the action of the horizontal telescopic cylinder 4, the first vertical telescopic cylinder 5 and the second vertical telescopic cylinder 7 through the air circuit.
[0046] The internal air passages of the frame 1 specifically include a first air passage 17, a second air passage 18, a third air passage 19, a fourth air passage 23, and a pneumatic valve 15.
[0047] like Figure 5As shown, the pneumatic valve 15 includes a second valve body 15-1 and a second valve core 15-2. The second valve body 15-1 has a first port 15-3, a second port 15-4, a third port 15-5, and a fourth port 15-6. The first port 15-3 and the second port 15-4 are located at opposite ends of the second valve body 15-1 and are used to control the movement of the second valve core 15-2. The pneumatic valve 15 operates as follows: When the first port 15-3 and the second port 15-4 are both ventilated, the effective working area of the end of the second valve core 15-2 near the first port 15-3 is smaller than that of the end near the second port 15-4, causing the second valve core 15-2 to block the first port 15-3. At the same time, the third port 15-5 and the fourth port 15-6 are connected to each other. When the first port 15-3 is ventilated and the second port 15-4 is not ventilated, the second valve core 15-2 moves and approaches the second port 15-4, opening the first port 15-3 and connecting the first port 15-3 with the third port 15-5.
[0048] The first air passage 17 is connected to the air source connection port 14, and is also connected to the cavity above the piston in the first vertical telescopic cylinder 5, the third connection port 4-6 of the first cylinder body 4-1, the air inlet 9-4 of the reversing pressure rod 9, and the first port 15-3 of the pneumatic valve 15 through a branch passage.
[0049] The second air passage 18 is connected to the air outlet 9-5 of the reversing lever 9, and is also connected to the first connecting port 4-4, the cavity below the piston in the first vertical telescopic cylinder 5, and the second port 15-4 of the pneumatic valve 15 through a branch passage.
[0050] The third air passage 19 is connected to the fourth port 15-6 of the pneumatic valve 15 and has an exhaust port 16 connected to it.
[0051] The fourth air passage 23 connects the second connecting port 4-5 and the third port 15-5 of the pneumatic valve 15.
[0052] The internal air passage of the slider is connected to the fourth connecting port 4-7 and at the same time to the upper cavity of the piston inside the second vertical telescopic cylinder 7.
[0053] Through the above-mentioned air circuit design, the reversing lever 9 can control the coordinated actions of the horizontal telescopic cylinder 4, the first vertical telescopic cylinder 5, and the second vertical telescopic cylinder 7.
[0054] The specific control process is as follows:
[0055] like Figure 1 , Figure 3As shown, in the initial state, the punch press is at its highest stroke position. The aluminum strip 13 passes through the rear pressure plate 8 and the front pressure plate 6. Then, high-pressure gas is introduced into the air source connection port 14. The first valve body 9-1 and the pressure rod 9-3 are lifted upward under the air pressure of the air inlet 9-4. The air inlet 9-4 and the air outlet 9-5 of the first valve body 9-1 are interconnected. The high-pressure gas enters the upper cavity of the piston in the first vertical telescopic cylinder 5, the third connection port 4-6 of the first cylinder body 4-1, the air inlet 9-4 of the reversing pressure rod 9, and the first port 15-3 of the pneumatic valve 15 through the first air passage 17. At the same time, the high-pressure gas enters the first connection port 4-4, the lower cavity of the piston in the first vertical telescopic cylinder 5, and the second port 15-4 of the pneumatic valve 15 through the second air passage 18. The gas entering the first connecting port 4-4 passes through the hollow guide rod 4-2, the hollow telescopic rod 4-3, the fourth connecting port 4-7, and the internal air passage of the slider 2 into the upper cavity of the piston inside the second vertical telescopic cylinder 7. Since gas is simultaneously introduced into the first port 15-3 and the second port 15-4 of the pneumatic valve 15, but the effective working area of the second valve core 15-2 at the second port 15-4 is greater than that at the first port 15-3, the second valve core 15-2 moves closer to the second port 15-4, connecting the third port 15-5 and the fourth port 15-6, thereby connecting the cavity at the front end of the first piston 4-8 of the horizontal telescopic cylinder 4 with the exhaust port 16 through the fourth air passage 23 and the third air passage 19.
[0056] At this time, for the second vertical telescopic cylinder 7, gas is introduced into the upper end of its internal piston, and the piston moves downward, causing the rear pressure plate 8 to move downward and press the aluminum strip 13. Simultaneously, for the first vertical telescopic cylinder 5, gas is introduced into both the upper and lower ends of its internal piston. Since the effective working area of the upper end of the piston is smaller than that of the lower end, the piston moves upward, causing the front pressure plate 6 to loosen. At the same time, for the horizontal telescopic cylinder 4, the front end of the first piston 4-8 is connected to the exhaust port 16, and air is introduced into the rear end of the first piston 4-8. The pressure at the front end of the first piston 4-8 is less than the pressure at the rear end, and the first piston 4-8 begins to drive the hollow telescopic rod 4-3 and the slider 2 forward. This achieves the action of the front pressure plate 6 loosening the aluminum strip 13, the rear pressure plate 8 pressing the aluminum strip 13, and the slider 2 moving forward, causing the aluminum strip 13 to move forward synchronously through the slider 2.
[0057] like Figure 2 , Figure 4As shown, the punch press then moves down to its lower limit position to perform a stamping operation on the aluminum strip 13. Simultaneously, the punch press lowers the pressure rod 9-3, causing the first valve core 9-2 to move to its lowest point. At this time, the first valve core 9-2 disconnects the air inlet 9-4 and air outlet 9-5 of the first valve body 9-1. High-pressure gas can only pass through the first air passage 17. Since there is no gas in the second air passage 18, the first port 15-3 of the pneumatic valve 15 is open to air, while the second port 15-4 is closed. The second valve body 15-1 moves closer to the second port 15-4, connecting the first port 15-3 and the third port 15-5.
[0058] At this point, for the second vertical telescopic rod cylinder, the upper end of its internal piston is no longer ventilated, causing the rear pressure plate 8 to loosen. Simultaneously, for the first vertical telescopic cylinder 5, the upper part of its internal piston is ventilated while the lower part is not, causing the piston to move downwards and drive the front pressure plate 6 to move downwards to press the aluminum strip 13. At the same time, for the horizontal telescopic rod, the front and rear ends of the first piston 4-8 are ventilated simultaneously. However, because the effective working area of the front end of the first piston 4-8 is greater than that of the rear end, the first piston 4-8 causes the hollow telescopic rod 4-3 and the slider 2 to move backwards. This achieves the action of the front pressure plate 6 pressing the aluminum strip 13, the rear pressure plate 8 releasing the aluminum strip 13, and the slider 2 starting to move backwards.
[0059] like Figure 1 , Figure 3 As shown, the punch press then begins to move upward, releasing the reversing pressure rod 9. The pressure rod 9-3 and the first valve core 9-2 move upward again, the front pressure plate 6 releases the aluminum strip 13, the rear pressure plate 8 presses the aluminum strip 13, and the slider 2 moves forward, driving the aluminum strip 13 to move forward synchronously.
[0060] The punch press reciprocates up and down to perform the stamping operation of the aluminum cover, while repeatedly pressing down or releasing the reversing lever 9. Through this invention, the aluminum strip 13 can be fed in sync with the punch press, so that the feeding rhythm of the aluminum strip 13 is perfectly matched with the stamping rhythm of the punch press.
[0061] In one embodiment of the present invention, an auxiliary frame 10 is further provided at the rear of the frame 1. The auxiliary frame 10 and the frame 1 are fixed together on the lower frame of the punch press. Guide rails 3 are respectively provided on both sides of the frame 1, and the two ends of the guide rails 3 are connected to the frame 1 and the auxiliary frame 10 respectively. Sliding grooves are respectively provided on both sides of the slider 2, and the sliding grooves are slidably connected to the guide rails 3. The guide rails 3 guide the slider 2 to move back and forth, thereby improving the accuracy and stability of the slider 2's movement.
[0062] In one embodiment of the present invention, a plurality of adjustment holes 3-1 are provided at the rear end of the guide rail 3 along the length direction of the guide rail 3. The two sides of the auxiliary frame 10 are connected to the adjustment holes 3-1 by bolts. The distance between the frame body 1 and the auxiliary frame 10 can be adjusted by installing the two sides of the auxiliary frame 10 on different adjustment holes 3-1, thereby adjusting the maximum stroke of the slider 2 moving back and forth.
[0063] In one embodiment of the present invention, a limiting rod 11 and a guide wheel 12 are provided on the auxiliary frame 10. The guide wheel 12 is located on both sides of the aluminum strip 13 to guide the aluminum strip 13. The aluminum strip 13 is located between the upper surface of the auxiliary frame 10 and the limiting rod 11.
[0064] In one embodiment of the present invention, a first buffer cylinder 20 is provided on the rear end face of the frame 1, and the first buffer cylinder 20 is connected to the internal air passage of the frame 1. The diameter of the port connecting the first buffer cylinder 20 to the first air passage 17 is small. Gas can be filled into the first buffer cylinder 20 through the first air passage 17. However, when the first buffer cylinder 20 contacts the slider 2, the slider 2 pushes the piston of the first buffer cylinder 20 to move. Due to the small port diameter, the gas cannot be discharged quickly, thereby compressing the gas in the first buffer cylinder 20 and realizing the buffering effect.
[0065] A second buffer cylinder 21 is provided on the rear end face of the slider 2. The second buffer cylinder 21 is located at the rear end of the hollow telescopic rod 4-3 and is connected to the hollow telescopic rod 4-3. The diameter of the port connecting the second buffer cylinder 21 and the hollow telescopic rod 4-3 is small. Gas can be filled into the second buffer cylinder 21 through the hollow telescopic rod 4-3. However, when the second buffer cylinder 21 contacts the auxiliary frame 10, it pushes the piston of the second buffer cylinder 21 to move. Due to the small port diameter, the gas cannot be discharged quickly, thereby compressing the gas in the second buffer cylinder 21 and achieving a buffering effect.
[0066] A third buffer cylinder 22 is provided at the end of the pressure rod 9-3. The cylinder body and piston of the third buffer cylinder 22 are sleeved on the pressure rod 9-3. The inner cavity of the third buffer cylinder 22 is connected to the air inlet 9-4 through the central hole of the pressure rod 9-3. The diameter of the port connecting the third buffer cylinder 22 to the central hole of the pressure rod 9-3 is small. Gas can be filled into the third buffer cylinder 22 through the central hole of the pressure plate. When the punch press presses down on the third buffer cylinder 22, the gas cannot be discharged quickly due to the small port diameter, thereby compressing the gas in the third buffer cylinder 22 and achieving a buffering effect.
[0067] The buffering effect of the first buffer cylinder 20, the second buffer cylinder 21 and the third buffer cylinder 22 can reduce the impact force on the invention during operation and effectively extend its service life.
[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A pneumatic feeding device for aluminum strip used in stamping, characterized in that, The device includes a frame and a slider. The frame and the slider are connected by a horizontal telescopic cylinder. A first vertical telescopic cylinder is provided on the frame, and a front pressure plate is provided at the upper end of the first vertical telescopic cylinder. A second vertical telescopic cylinder is provided on the slider, and a rear pressure plate is provided at the upper end of the second vertical telescopic cylinder. An air source connection port is provided on the frame, and an internal air passage communicating with the air source connection port is provided inside the frame. The horizontal telescopic cylinder and the first vertical telescopic cylinder are controlled and connected to the internal air passage of the frame. An internal air passage is provided inside the slider, and the second vertical telescopic cylinder is controlled and connected to the internal air passage of the slider. The horizontal telescopic cylinder has a hollow structure. The internal air passage of the frame and the internal air passage of the slider are interconnected through the horizontal telescopic cylinder. A reversing pressure rod is provided on the frame and connected to the internal air passage of the frame. The punch press moves down and presses down the reversing pressure rod. The reversing pressure rod controls the action of the horizontal telescopic cylinder, the first vertical telescopic cylinder, and the second vertical telescopic cylinder through the internal air passage of the frame. The horizontal telescopic cylinder includes a first cylinder body, a hollow guide rod disposed inside the first cylinder body, a hollow telescopic rod sleeved on the hollow guide rod, the front end of the hollow guide rod being fixed to the first cylinder body and communicating with a first communication port, the front end of the hollow telescopic rod being provided with a first piston contacting the inner wall of the first cylinder body, the rear end of the hollow telescopic rod extending out of the frame and into the slider, a second communication port being provided at the front of the first cylinder body, a third communication port being provided at the rear of the first cylinder body, and a fourth communication port being provided at the rear end of the hollow telescopic rod. The reversing lever includes a first valve body, a first valve core, and a lever. An air inlet and an air outlet are provided on the first valve body. The lever is connected to the first valve core and extends out of the valve body. The movement of the first valve core controls the connection and disconnection of the air inlet and the air outlet. The internal air passages of the frame include: A pneumatic valve includes a second valve body and a second valve core. The second valve body has a first port, a second port, a third port, and a fourth port. The first port and the second port are located at opposite ends of the second valve body and are used to control the movement of the second valve core. When the second valve core is close to the first port, the third port and the fourth port are connected to each other. When the second valve core is close to the second port, the first port and the third port are connected. The first air passage is connected to the air source connection port, and is connected to the cavity above the piston in the first vertical telescopic cylinder, the third connection port of the first cylinder, the air inlet of the reversing pressure rod, and the first port of the pneumatic valve. The second air passage is connected to the air outlet of the reversing pressure rod, the first connecting port, the cavity at the lower part of the piston in the first vertical telescopic cylinder, and the second port of the pneumatic valve. The third air passage is connected to the fourth port of the pneumatic valve and has an exhaust port. The fourth air passage is connected to the second connection port and the third port of the pneumatic valve.
2. The pneumatic feeding device for stamping aluminum strip according to claim 1, characterized in that, An auxiliary frame is provided at the rear of the frame, and guide rails are provided on both sides of the frame. The two ends of the guide rails are connected to the frame and the auxiliary frame, respectively. Sliding grooves are provided on both sides of the slider, and the sliding grooves are slidably connected to the guide rails.
3. The pneumatic feeding device for stamping aluminum strip according to claim 2, characterized in that, Several adjustment holes are provided at the rear end of the guide rail along the length of the guide rail. The stroke of the slider moving back and forth is adjusted by installing different adjustment holes on both sides of the auxiliary frame.
4. The pneumatic feeding device for stamping aluminum strip according to claim 2, characterized in that, Limiting rods and guide wheels are provided on the auxiliary frame. The guide wheels are located on both sides of the aluminum strip to guide the aluminum strip, which is located between the upper surface of the auxiliary frame and the limiting rods.
5. The pneumatic feeding device for stamping aluminum strip according to claim 1, characterized in that, A first buffer cylinder is provided on the rear end face of the frame, and the first buffer cylinder is connected to the internal air passage of the frame.
6. The pneumatic feeding device for stamping aluminum strip according to claim 1, characterized in that, A second buffer cylinder is provided on the rear end face of the slider. The second buffer cylinder is located at the rear end of the hollow telescopic rod and is in communication with the hollow telescopic rod.
7. The pneumatic feeding device for stamping aluminum strip according to claim 1, characterized in that, The internal air passage of the slider is connected to the fourth communication port and simultaneously connected to the upper cavity of the piston inside the second vertical telescopic cylinder.
8. The pneumatic feeding device for stamping aluminum strip according to claim 1, characterized in that, A third buffer cylinder is provided at the end of the pressure rod. The cylinder body and piston of the third buffer cylinder are sleeved on the pressure rod. The inner cavity of the third buffer cylinder is connected to the air inlet through the central hole of the pressure rod.