Cold-pressing device for metal sheet

Abstract

This invention discloses a cold pressing device for metal sheets, belonging to the technical field of cold pressing devices. The key technical features are: a base, a hydraulic cylinder, a guide rod, and a pressure plate. The hydraulic cylinder is mounted on the base, and its output end is connected to the guide rod. The guide rod is slidably mounted on the base and connected to the pressure plate. The base has a worktable for placing the metal sheet. A peeling assembly and a pushing assembly are provided on the base. The peeling assembly is located at the end of the metal sheet near the discharge end. The peeling assembly is used to first disengage the end of the metal sheet from the worktable and release a high-speed airflow directed between the metal sheet and the worktable, thereby forming an air cushion between the metal sheet and the worktable. The pushing assembly can push the metal sheet towards the discharge end after the air cushion is formed between the metal sheet and the worktable. This cold pressing device can avoid deformation, scratches, and damage caused by adhesion when the metal sheet is unloaded.

Description

Technical Field

[0001] This invention belongs to the technical field of cold pressing devices, and specifically relates to a cold pressing device for metal sheets. Background Technology

[0002] Chinese Patent No. CN212857288U discloses a cold pressing device for thin sheet precious metals that facilitates material handling. The device includes a main frame, a push rod, and a collection box. A hydraulic telescopic rod is installed on the top of the main frame, and a connecting rod passes through the end of the hydraulic telescopic rod. A fixing pin is provided at the end of the connecting rod, and a main shaft is provided at the end of the fixing pin. A through rod is connected to the bottom of the main shaft, and a connecting plate is provided at the bottom of the through rod. An elastic spring is connected to the bottom of the connecting plate, and a base plate is connected to the bottom of the elastic spring. A connecting post is provided on the side of the elastic spring, and an outer sleeve is provided on the outside of the connecting post. The push rod passes through the right side of the main frame, and a sliding groove is formed on the inner side of the push rod.

[0003] The above technical solution has the following defects: The cold pressing device pushes the cold-pressed parts with a push plate on the push rod, thereby pushing the precious metal sheet from the worktable into the collection box. However, during the cold pressing process, because the surface of the precious metal sheet is smooth and subjected to pressure, it is easy to generate vacuum adsorption with the worktable, resulting in adhesion. In this case, forcibly pushing the precious metal sheet away with the push plate can easily cause the precious metal sheet to deform, scratch and be damaged. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a cold pressing device for metal sheets. The technical problem to be solved by this invention is: how to avoid deformation, scratches and damage when pushing away metal sheets due to adhesion issues.

[0005] The above-mentioned technical objective of the present invention can be achieved through the following technical solution: a cold pressing device for metal sheets, characterized in that: it includes a base, a hydraulic cylinder, a guide rod, and a pressure plate; the hydraulic cylinder is mounted on the base, the output end of the hydraulic cylinder is connected to the guide rod, the guide rod is slidably disposed on the base, and the guide rod is connected to the pressure plate; the base has a worktable for placing metal sheets; the base is provided with a peeling component and a pushing component; the peeling component is located at the end of the metal sheet near the discharge end; the peeling component is used to make the end of the metal sheet first disengage from the worktable and release a high-speed airflow directed between the metal sheet and the worktable, thereby forming an air cushion between the metal sheet and the worktable; the pushing component can push the metal sheet towards the discharge end after the air cushion is formed between the metal sheet and the worktable.

[0006] In the aforementioned cold pressing apparatus for metal sheets, the peeling assembly includes a rotary drive source, a peeling roller, and a connector. The rotary drive source is used to drive the peeling roller to rotate toward the discharge end. The peeling roller is connected to an external air source through the connector. The peeling roller has an air outlet channel pointing between the metal sheet and the worktable.

[0007] In the aforementioned cold pressing device for metal sheets, the stripping roller includes an outer sleeve and an inner mandrel. The outer sleeve includes an integrally formed rigid substrate and an elastic surface layer covering the outer periphery of the rigid substrate. The outer sleeve has several sets of vent holes, which are evenly distributed along the circumference of the outer sleeve. The outer sleeve is rotatably disposed on the outside of the inner mandrel. The output end of the rotary drive source is connected to the outer sleeve. The connector is disposed at the end of the inner mandrel. The inner mandrel is hollow and has a cavity, which is connected to the connector. The inner mandrel has a strip-shaped hole, which is connected to the cavity. When the outer sleeve rotates relative to the inner mandrel, the several sets of vent holes rotate sequentially to a position aligned between the metal sheet and the worktable surface, and the strip-shaped hole is aligned with the vent hole aligned at that position.

[0008] In the aforementioned cold pressing device for metal sheets, an annular cavity is provided between the outer sleeve and the inner mandrel. Several sets of air outlets and strip holes are connected to the annular cavity. The airflow flows sequentially through the cavity, the strip holes, and the annular cavity before being ejected from the air outlets.

[0009] In the aforementioned cold pressing device for metal sheets, the outer wall of the outer sleeve abuts against the end of the metal sheet near the discharge end, the lowest point of the outer sleeve is lower than the upper surface of the metal sheet by 0.mm-0.mm, and there is a gap between the lowest point of the outer sleeve and the worktable surface.

[0010] In the aforementioned cold pressing device for metal sheets, the pushing assembly includes a driving member, a push rod, and a push plate. The output end of the driving member is connected to the push plate via the push rod. The driving member is used to drive the push plate to move closer to or away from the discharge end, and the push plate can push the metal sheet to move towards the discharge end.

[0011] In the aforementioned cold pressing device for metal sheets, the feeding assembly includes a reciprocating screw, a nut, a pusher plate, a slide rail, and a slider. The reciprocating screw is rotatably mounted on the base. The output end of the rotary drive source is connected to the reciprocating screw via a transmission assembly. The nut is sleeved on the outside of the reciprocating screw and the two are threaded together. The slide rail is mounted on the base, and the slider is slidably mounted on the slide rail. The pusher plate is connected to the nut and the slider. When the reciprocating screw rotates, the nut drives the pusher plate to reciprocate along the reciprocating screw, thereby causing the pusher plate to move closer to or further away from the discharge end.

[0012] In the aforementioned cold pressing device for metal sheets, the transmission assembly includes a first transmission gear, a second transmission gear, a rotating shaft, a first bevel gear, and a second bevel gear. The first transmission gear is coaxially connected to the outer sleeve. The rotating shaft is rotatably mounted on the base. The second transmission gear is coaxially connected to the rotating shaft. The first transmission gear meshes with the second transmission gear. The first bevel gear is coaxially connected to the rotating shaft. The second bevel gear is coaxially connected to the reciprocating lead screw. The first bevel gear meshes with the second bevel gear.

[0013] In the aforementioned cold pressing device for metal sheets, two mounting brackets are arranged opposite each other on both sides of the base. Each mounting bracket has a vertically oriented sliding groove, and a corresponding bearing seat is slidably mounted within each groove. One end of the outer sleeve is coaxially mounted on the inner ring of the corresponding bearing seat, and one end of the inner mandrel is coaxially mounted on the inner ring of the other bearing seat. A bearing is positioned between the inner mandrel and the outer sleeve. A floating pressure application component is installed within the groove, which applies a vertically downward elastic preload to the bearing seat. An adjusting screw is threaded onto the mounting bracket, and the end of the adjusting screw abuts against the lower surface of the bearing seat. The output end of the rotary drive source is connected to the outer sleeve via a cross-shaped telescopic coupling, and the connector is connected to an external air source via a flexible hose. Both sides of the mounting bracket have mounting ports connecting to the outside and the groove, allowing the bearing seat and the floating pressure application component to pass through.

[0014] In the above-mentioned cold pressing device for metal sheets, the floating pressure assembly includes a positioning block, a spring, and a pressure rod. The positioning block is detachably fixed in the slide groove, and a receiving cavity is formed in the positioning block. The spring is disposed in the receiving cavity, and the pressure rod is slidably disposed in the receiving cavity. The sliding of the pressure rod can cooperate with the positioning block to squeeze the spring. The outer end of the pressure rod is connected to the bearing seat.

[0015] In summary, the advantages of this invention compared to the prior art are as follows: 1. By setting a peeling component on the base, the end of the metal sheet is separated from the worktable surface first during unloading. At the same time, by releasing a high-speed airflow directed between the metal sheet and the worktable surface, an air cushion is formed between the metal sheet and the worktable surface, which effectively breaks the vacuum adsorption and friction between the cold-pressed metal sheet and the worktable surface, significantly reducing the resistance when unloading the metal sheet and avoiding damage to the metal sheet caused by forced unloading. 2. The outer sleeve includes an integrally formed rigid substrate and an elastic surface layer covering the outer periphery of the rigid substrate. The elastic surface layer of the outer sleeve forms a flexible extrusion contact with the metal sheet, which ensures sufficient friction to make the end of the metal sheet curl up, while avoiding edge damage to the metal sheet caused by rigid impact. At the same time, the floating pressure component applies elastic pre-pressure to the bearing seat, which enables the peeling roller to adaptively float according to the thickness change and surface unevenness of the metal sheet, ensuring the stability of the contact pressure between the outer sleeve and the metal sheet. This not only improves the versatility of metal sheets of different thicknesses, but also effectively prevents sheet damage or peeling roller jamming caused by rigid compression. 3. When the outer sleeve rotates, the airflow is ejected at high speed only from the air outlet positioned between the metal sheet and the worktable, achieving directional air jetting. This ensures that the airflow is concentrated on the position between the metal sheet and the worktable, efficiently forming an effective air cushion. Only a small amount of airflow flows out in other directions, which not only helps the air cushion to form but also avoids continuous high-flow consumption of the air source, significantly reducing energy consumption. It also prevents the stability of the metal sheet from being affected by excessive airflow in other directions. In addition, the annular cavity plays a buffering and pressure equalization role when the airflow enters at high speed from the strip hole, preventing the formation effect of the air cushion from being affected by instantaneous pressure and preventing the metal sheet from being blown off course due to excessive instantaneous impact force of the airflow. 4. The rotary drive source drives the outer sleeve to rotate and transmits power to the pusher component through the transmission component. That is, the peeling action and the pushing action share a rotary drive source, so that the peeling action and the pushing action are synchronized. This not only effectively reduces production costs and control complexity, but also improves the consistency of action and the level of automation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1; Figure 2 This is a schematic diagram of the structure of the peeling component in Embodiment 1; Figure 3 This is a cross-sectional view of the peeling roller in Embodiment 1; Figure 4 This is a partial cross-sectional view of Embodiment 1; Figure 5 This is Example 2, mainly for demonstration purposes; Figure 6 This is a schematic diagram of the structure of Example 2.

[0017] Reference numerals: 1. Base; 2. Hydraulic cylinder; 3. Guide rod; 4. Pressure plate; 5. Worktable; 6. Peeling assembly; 61. Rotary drive source; 62. Peeling roller; 621. Outer sleeve; 622. Inner mandrel; 63. Connector; 7. Pushing assembly; 71. Drive component; 72. Push rod; 73. Push plate; 74. Reciprocating screw; 75. Nut; 77. Slide rail; 78. Slider; 8. Air outlet; 9. Cavity; 10. 11. Strip-shaped hole; 12. Annular cavity; 13. Bevel gear one; 14. Bevel gear two; 15. Mounting bracket; 16. Slide groove; 17. Bearing seat; 18. Floating pressure assembly; 19. Positioning block; 10. Spring; 11. Pressure rod; 12. Adjusting screw; 13. Discharge end; 24. Cross telescopic coupling; 25. Receiving cavity; 26. Rotating shaft; 27. Transmission gear one; 28. Transmission gear two; 29. ​​Mounting port. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments. Example 1:

[0019] A cold pressing device for metal sheets, such as Figures 1 to 4 As shown, the device includes a base 1, a hydraulic cylinder 2, a guide rod 3, and a pressure plate 4. The hydraulic cylinder 2 is mounted on the base 1, and its output end is connected to one end of the guide rod 3. The guide rod 3 is slidably mounted on the base 1. The base 1 has a guide hole that cooperates with the guide rod 3 for guidance. The other end of the guide rod 3 is connected to the pressure plate 4. The base 1 has a worktable 5 for placing metal sheets. The pressure plate 4 is located directly above the worktable 5. The output end of the hydraulic cylinder 2 extends or retracts, thereby causing the guide rod 3 to drive the pressure plate 4 to move up and down in the vertical direction. Through the guide hole and the guide rod 3, the pressure plate 4 can be smoothly raised and lowered in the vertical direction during operation, thereby applying uniform pressure to the metal sheet and avoiding deformation of the metal sheet due to uneven pressure.

[0020] During operation, the metal sheet to be processed is first placed on the worktable 5 of the base 1. Then, the hydraulic cylinder 2 is started, and the output end of the hydraulic cylinder 2 extends, pushing the guide rod 3 to slide vertically downward along the guide hole on the base 1. The guide rod 3 simultaneously drives the pressure plate 4 to move downward. When the lower surface of the pressure plate 4 contacts the metal sheet, the hydraulic cylinder 2 continues to apply pressure, so that the pressure plate 4 cold presses the metal sheet at the set pressure. After the cold pressing is completed, the output end of the hydraulic cylinder 2 retracts and drives the pressure plate 4 to move upward in the vertical direction through the guide rod 3, and the pressure plate 4 leaves the metal sheet.

[0021] One side of the base 1 is the discharge end 19 for feeding metal sheets. The base 1 is provided with a peeling component 6, which is located at the end of the metal sheet near the discharge end 19. The peeling component 6 is used to make the end of the metal sheet first disengage from the worktable 5 and release a high-speed airflow pointing between the metal sheet and the worktable 5, thereby forming an air cushion between the metal sheet and the worktable 5.

[0022] It should be noted that by forming an air cushion between the metal sheet and the worktable 5, the vacuum adsorption and friction between the cold-pressed metal sheet and the worktable 5 are effectively destroyed, significantly reducing the resistance when the metal sheet is unloaded and avoiding damage to the metal sheet caused by forced unloading.

[0023] In this embodiment, the peeling assembly 6 includes a rotary drive source 61, a peeling roller 62, and a connector 63. The rotary drive source 61 is preferably a motor. Alternatively, other drive sources with rotational functions can be used. In this embodiment, the peeling roller 62 includes an outer sleeve 621 and an inner spindle 622. The outer sleeve 621 includes an integrally formed rigid substrate and an elastic surface layer covering the outer periphery of the rigid substrate. The output end of the rotary drive source 61 is connected to the outer sleeve 621. The outer sleeve 621 is rotatably disposed outside the inner spindle 622. Preferably, the output end of the rotary drive source 61 is connected to the outer sleeve 621 through a cross telescopic coupling 20. The cross telescopic coupling 20 is prior art, and its specific structure and principle will not be described in detail.

[0024] The rotary drive source 61 is used to drive the outer sleeve 621 to rotate towards the discharge end 19. Preferably, the elastic surface of the outer sleeve 621 is made of an elastic material. The elastic surface of the outer sleeve 621 abuts against the end of the metal sheet near the discharge end 19. The lowest point of the elastic surface is 0.2mm-0.3mm lower than the upper surface of the metal sheet. This ensures that the elastic surface forms a contact arc with the metal sheet after being compressed, thereby increasing the contact area and preventing slippage. This not only ensures that the outer sleeve 621 rotates towards the discharge end 19, but also ensures that the outer sleeve 621 rotates towards the discharge end 19. When 21 rotates towards the discharge end 19, the elastic surface of the outer sleeve 621 contacts the end of the metal sheet, causing it to disengage from the worktable surface 5 first. It also makes the force exerted by the elastic surface of the outer sleeve 621 on the metal sheet more uniform, preventing local stress concentration from causing the edge of the metal sheet to warp. That is, when the elastic surface of the outer sleeve 621 contacts the metal sheet, it forms a flexible extrusion contact, which can provide sufficient friction to make the end of the metal sheet warp, and avoid rigid impact causing damage to the edge of the sheet.

[0025] There is a gap between the lowest point of the elastic surface and the worktable 5 to ensure that the peeling roller 62 does not directly contact the worktable 5, thus avoiding wear or damage to the worktable.

[0026] Furthermore, two mounting brackets 14 are arranged opposite each other on both sides of the base 1. Each mounting bracket 14 has a vertically arranged groove 15. A bearing seat 16 is slidably arranged in each of the two grooves 15. The bearing seat 16 is adapted to the groove 15. A bearing is arranged between the inner spindle 622 and the outer sleeve 621. The outer sleeve 621 is rotatably arranged outside the inner spindle 622 through the bearing. One end of the outer sleeve 621 is coaxially arranged on the inner ring of the bearing in the corresponding bearing seat 16. One end of the inner spindle 622 is coaxially arranged on the inner ring of the bearing in the corresponding bearing seat 16.

[0027] An adjusting screw 18 is threaded onto the mounting bracket 14. The end of the adjusting screw 18 abuts against the lower surface of the bearing seat 16, thereby restricting the bearing seat 16 and limiting the lowest point of the elastic surface of the outer sleeve 621. Of course, depending on the thickness of the metal sheet, the position of the adjusting screw 18 can be changed by rotating it, thereby adjusting the height of the stripping roller 62. This adapts to the needs of metal sheets of different thicknesses, significantly improving the versatility of the device.

[0028] A floating pressure application component 17 is provided inside the slide groove 15. The floating pressure application component 17 is used to apply a vertically downward elastic preload to the bearing seat 16. In this embodiment, the floating pressure application component 17 includes a positioning block 171, a spring 172, and a pressure rod 173. The positioning block 171 is detachably fixed inside the slide groove 15 and is adapted to the slide groove 15. The positioning block 171 and the mounting bracket 14 are detachably fixed by bolts. A receiving cavity 21 is provided inside the positioning block 171. The spring 172 is disposed in the receiving cavity 21, and the pressure rod 173 is slidably disposed in the receiving cavity 21. The sliding of the pressure rod 173 can cooperate with the positioning block 171 to squeeze. The outer ends of the spring 172 and the pressure rod 173 are connected to the bearing housing 16. The preload applied by the spring 172 is transmitted to the bearing housing 16 through the pressure rod 173 and the positioning block 171. This ensures that the peeling roller 62 can adaptively float according to the thickness variation and surface unevenness of the metal sheet during operation. Even if there are certain differences in the thickness of different metal sheets, it can ensure that the outer sleeve 621 maintains a stable contact pressure with the end of the metal sheet, preventing damage to the sheet or jamming of the peeling roller 62 due to rigid clamping. This is especially suitable for metal sheets with poor surface flatness, effectively improving the stability and yield of the feeding process. Both sides of the mounting bracket 14 have mounting ports 25 that connect to the outside and the slide 15. The mounting ports 25 allow the bearing housing 16 and the floating pressure assembly 17 to pass through, thereby facilitating assembly and maintenance.

[0029] The stripping roller 62 is connected to an external air source through a connector 63. Specifically, the connector 63 is coaxially located at the end of the inner core 622. The connector 63 is connected to the external air source through a hose. The inner core 622 is hollow and has a cavity 9. The cavity 9 is connected to the connector 63.

[0030] The stripping roller 62 has an air outlet channel pointing between the metal sheet and the worktable 5. Specifically, the outer sleeve 621 has several sets of air outlet holes 8, which are evenly distributed along the circumference of the outer sleeve 621. The inner core shaft 622 has a strip hole 10, which is connected to the cavity 9. There is an annular cavity 11 between the outer sleeve 621 and the inner core shaft 622. The several sets of air outlet holes 8 and the strip hole 10 are all connected to the annular cavity 11. The airflow flows through the cavity 9, the strip hole 10 and the annular cavity 11 in sequence and is ejected from the air outlet hole 8.

[0031] When the outer sleeve 621 rotates relative to the inner spindle 622, several sets of air outlets 8 rotate sequentially to the position aligned between the metal sheet and the worktable surface 5, and the strip-shaped hole 10 is positioned opposite to the air outlet 8 aligned at this position. At this time, the airflow in the cavity 9 flows out from the strip-shaped hole 10 and is directly ejected from the corresponding air outlet 8 through the annular cavity 11, forming a high-speed airflow pointing towards the gap between the metal sheet and the worktable surface 5. This achieves directional jetting, ensuring that the airflow is concentrated on the position between the metal sheet and the worktable surface 5, forming an effective air cushion, thereby eliminating the adhesion between the metal sheet and the worktable surface 5. In addition, the airflow applies pressure to the metal sheet towards the discharge end 19. The propulsive force and the rotation of the outer sleeve 621 work together to make the end of the metal sheet first detach from the worktable surface 5, while a small amount of airflow will diffuse along the annular cavity 11 to other sets of air outlets 8. The small amount of airflow flows out slowly, which not only ensures the efficiency of air cushion formation, but also avoids the stability of the metal sheet being affected by excessive airflow in other directions. It also avoids the continuous high flow rate consumption of the air source, significantly reducing energy consumption. At the same time, the annular cavity 11 can play a certain role in buffering and equalizing pressure when the airflow enters at high speed from the strip hole 10, avoiding the effect of instantaneous pressure on the air cushion formation effect, and avoiding the metal sheet being blown off course by excessive instantaneous impact force of the airflow.

[0032] It should be noted that there is a corresponding sealing structure between the inner mandrel 622 and the outer sleeve 621 to prevent gas leakage. The sealing structure can use the sealing ring in the existing technology, which will not be described in detail here.

[0033] A pushing component 7 is provided on the base 1. The pushing component 7 can push the metal sheet towards the discharge end 19 after forming an air cushion between the metal sheet and the worktable 5. In this embodiment, the pushing component 7 includes a driving component 71, a push rod 72 and a push plate 73. The driving component 71 is preferably an electric push rod 72. The output end of the driving component 71 is connected to the push plate 73 through the push rod 72. The driving component 71 is used to drive the push plate 73 to move closer to or away from the discharge end 19. The push plate 73 can push the metal sheet towards the discharge end 19. That is, when an air cushion is formed between the metal sheet and the worktable 5, the output end of the driving component 71 extends to drive the push plate 73, so that the push plate 73 pushes the metal sheet towards the discharge end 19. After the material is discharged, the output end of the driving component 71 retracts to reset the push plate 73.

[0034] That is, after the air cushion is formed, the pushing component 7 pushes the metal sheet in a low-resistance manner. The pushing process is stable and controllable, avoiding deformation, scratches and damage to the metal sheet caused by forcibly pushing it away.

[0035] The working principle of this embodiment is as follows: First, the metal sheet is placed on the worktable 5 of the base 1. The hydraulic cylinder 2 drives the guide rod 3 and the pressure plate 4 to press down vertically, completing the cold pressing of the metal sheet. After the cold pressing is completed, the hydraulic cylinder 2 drives the guide rod 3 to lift the pressure plate 4 back to its original position. At this time, the rotary drive source 61 drives the outer sleeve 621 to rotate towards the discharge end 19. The elastic surface of the outer sleeve 621 makes flexible extrusion contact with the end of the metal sheet, causing it to lift up first. Then, the external airflow enters the cavity 9 through the connector 63, and then flows through the strip hole 10 and the annular cavity 11 in sequence before being ejected from the air outlet 8. The gap between the sheet and the worktable 5 forms an air cushion. Then, the drive unit 71 drives the push plate 73 through the push rod 72 to smoothly push the metal sheet towards the direction closer to the discharge end 19 until the push plate 73 reaches the position close to the outer sleeve 621. At this time, most of the metal sheet has left the worktable 5. Then, the drive unit 71 drives the push plate 73 through the push rod 72 to move away from the discharge end 19 until it is reset. At the same time, the metal sheet moves outward from the discharge end 19 under the guidance of the outer sleeve 621. After the metal sheet completely leaves the worktable 5, the external air source stops supplying air.

[0036] It should be noted that a camera unit can also be installed on the base 1 to help observe whether the end of the metal sheet is properly raised or stuck, and manual intervention can be carried out in advance if any abnormality occurs. Example 2:

[0037] The difference between Example 2 and Example 1 is that, as Figures 5 to 6As shown, the feeding assembly 7 includes a reciprocating screw 74, a nut 75, a push plate 73, a slide rail 77, and a slider 78. The reciprocating screw 74 is rotatably disposed inside the base 1. The output end of the rotary drive source 61 is connected to the reciprocating screw 74 via a transmission assembly. The nut 75 is sleeved on the outside of the reciprocating screw 74 and the two are threaded together. The slide rail 77 is disposed inside the base 1, and the slider 78 is slidably disposed on the slide rail 77. The push plate 73 is connected to the nut 75 and the slider 78 via a connecting part. The base 1 has a clearance channel to avoid the connecting part. The two clearance channels are located outside the metal sheet placement area and do not interfere with or damage the cold pressing area.

[0038] In this embodiment, the transmission assembly includes a first transmission gear 23, a second transmission gear 24, a rotating shaft 22, a first bevel gear 12, and a second bevel gear 13. The first transmission gear 23 is coaxially connected to the rigid base of the outer sleeve 621. The rotating shaft 22 is rotatably mounted on the base 1. The second transmission gear 24 is coaxially connected to the rotating shaft 22. The first transmission gear 23 meshes with the second transmission gear 24. The first bevel gear 12 is coaxially connected to the rotating shaft 22. The second bevel gear 13 is coaxially connected to the reciprocating lead screw 74. The first bevel gear 12 meshes with the second bevel gear 13.

[0039] That is, while the output end of the rotary drive source 61 drives the outer sleeve 621 to rotate, the transmission gear 1 23 rotates and drives the transmission gear 24 to rotate. The transmission gear 24 drives the rotating shaft 22 and the bevel gear 12 to rotate. The bevel gear 12 drives the bevel gear 2 13 to rotate. The bevel gear 2 13 then drives the reciprocating screw 74 to rotate. At this time, the nut 75 drives the push plate 73 to reciprocate along the reciprocating screw 74, thereby enabling the push plate 73 to move closer to or away from the discharge end 19. The reciprocating screw 74 adopts a double spiral groove (not shown in the figure) and automatically reverses when the nut 75 runs to its end.

[0040] It should be noted that the rotation of the outer sleeve 621 and the pushing action share a single rotary drive source 61, eliminating the need for a separate drive component 71 for the pushing action. This effectively reduces production costs and the complexity of the control program. As the outer sleeve 621 rotates, the push plate 73 pushes the metal sheet synchronously, thereby achieving the linkage between the peeling action and the pushing action, further improving the consistency of the action and the level of automation.

[0041] The working principle of this embodiment is as follows: First, the metal sheet is placed on the worktable 5 of the base 1. The hydraulic cylinder 2 drives the guide rod 3 and the pressure plate 4 to press down vertically to complete the cold pressing of the metal sheet. After the cold pressing is completed, the hydraulic cylinder 2 drives the guide rod 3 to lift the pressure plate 4 to reset. At this time, the rotary drive source 61 drives the outer sleeve 621 to rotate towards the discharge end 19. The outer sleeve 621 makes flexible extrusion contact with the end of the metal sheet, causing it to lift up first. Then, the external airflow enters the cavity 9 through the connector 63, and then flows through the strip hole 10 and the annular cavity 11 in sequence before being ejected from the air outlet 8, forming an air cushion in the gap between the metal sheet and the worktable 5. While the rotary drive source 61 drives the outer sleeve 621 to rotate, it drives the rotating shaft 22 to rotate through the meshing of transmission gear 1 23 and transmission gear 24. Then, through the meshing of bevel gear 1 12 and bevel gear 2 13, it drives the reciprocating screw 74 to rotate synchronously. The nut 75 drives the push plate 73 to move along the reciprocating screw 74 towards the discharge end 19. The push plate 73 smoothly pushes the metal sheet towards the discharge end 19. At this time, the push plate 73 abuts against the side of the metal sheet away from the discharge end 19, and the push plate 73 pushes the metal sheet towards the discharge end 19. As the reciprocating screw 74 continues to rotate, the nut 75 drives the push plate 73 to move to the front limit position near the outer sleeve 621. Since the reciprocating screw 74 automatically reverses direction, the nut 75 does not need to change the direction of rotation of the rotation drive source 61, and automatically starts to move in the opposite direction, driving the push plate 73 to move and reset in the direction away from the discharge end 19. During the process of the push plate 73 moving and resetting, the outer sleeve 621 always maintains rotation in the direction of the discharge end 19, continuously guiding the metal sheet to the discharge end 19 until the metal sheet is completely removed from the worktable 5.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the invention; those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A cold pressing apparatus for metal sheets, characterized in that: The system includes a base (1), a hydraulic cylinder (2), a guide rod (3), and a pressure plate (4). The hydraulic cylinder (2) is mounted on the base (1), and the output end of the hydraulic cylinder (2) is connected to the guide rod (3). The guide rod (3) is slidably disposed on the base (1) and connected to the pressure plate (4). The base (1) has a worktable (5) for placing metal sheets. The base (1) is provided with a peeling component (6) and a pushing component (7). The peeling component (6) is located at the end of the metal sheet near the discharge end (19). The peeling component (6) is used to make the end of the metal sheet disengage from the worktable (5) first and release a high-speed airflow pointing between the metal sheet and the worktable (5), thereby forming an air cushion between the metal sheet and the worktable (5). The pushing component (7) can push the metal sheet towards the discharge end (19) after the air cushion is formed between the metal sheet and the worktable (5).

2. The cold pressing apparatus for metal sheets according to claim 1, characterized in that: The peeling assembly (6) includes a rotary drive source (61), a peeling roller (62), and a connector (63). The rotary drive source (61) is used to drive the peeling roller (62) to rotate toward the discharge end (19). The peeling roller (62) is connected to an external air source through the connector (63). The peeling roller (62) has an air outlet channel pointing between the metal sheet and the worktable (5).

3. The cold pressing apparatus for metal sheets according to claim 2, characterized in that: The stripping roller (62) includes an outer sleeve (621) and an inner mandrel (622). The outer sleeve (621) includes an integrally formed rigid substrate and an elastic surface layer covering the outer periphery of the rigid substrate. The outer sleeve (621) has several sets of air outlets (8), which are evenly distributed along the circumference of the outer sleeve (621). The outer sleeve (621) is rotatably disposed on the outside of the inner mandrel (622). The output end of the rotary drive source (61) is connected to the outer sleeve (621) in a transmission manner. The connector (63) is provided with At the end of the inner mandrel (622), a cavity (9) is formed in the inner mandrel (622), and the cavity (9) is connected to the connector (63). A strip hole (10) is opened on the inner mandrel (622), and the strip hole (10) is connected to the cavity (9). When the outer sleeve (621) rotates relative to the inner mandrel (622), a number of the air outlets (8) rotate sequentially to the position between the metal sheet and the worktable (5), and the strip hole (10) is opposite to the air outlet (8) aligned at that position.

4. The cold pressing apparatus for metal sheets according to claim 3, characterized in that: There is an annular cavity (11) between the outer sleeve (621) and the inner mandrel (622). Several sets of air outlets (8) and strip holes (10) are connected to the annular cavity (11). The airflow flows through the cavity (9), the strip hole (10) and the annular cavity (11) in sequence and is ejected from the air outlet (8).

5. The cold pressing apparatus for metal sheets according to claim 4, characterized in that: The outer wall of the outer sleeve (621) abuts against the end of the metal sheet near the discharge end (19). The lowest point of the outer sleeve (621) is 0.2mm-0.3mm lower than the upper surface of the metal sheet. There is a gap between the lowest point of the outer sleeve (621) and the worktable (5).

6. The cold pressing apparatus for metal sheets according to claim 5, characterized in that: The feeding assembly (7) includes a driving component (71), a push rod (72), and a push plate (73). The output end of the driving component (71) is connected to the push plate (73) through the push rod (72). The driving component (71) is used to drive the push plate (73) to move closer to or away from the discharge end (19). The push plate (73) can push the metal sheet to move towards the discharge end (19).

7. The cold pressing apparatus for metal sheets according to claim 5, characterized in that: The feeding assembly (7) includes a reciprocating screw (74), a nut (75), a push plate (73), a slide rail (77), and a slider (78). The reciprocating screw (74) is rotatably mounted on the base (1). The output end of the rotary drive source (61) is connected to the reciprocating screw (74) via a transmission assembly. The nut (75) is sleeved on the outside of the reciprocating screw (74) and the two are threaded together. The slide rail (77) is mounted on the base (1). The slider (78) is slidably mounted on the slide rail (77). The push plate (73) is connected to the nut (75) and the slider (78). When the reciprocating screw (74) rotates, the nut (75) drives the push plate (73) to reciprocate along the reciprocating screw (74), thereby causing the push plate (73) to move closer to or further away from the discharge end (19).

8. The cold pressing apparatus for metal sheets according to claim 7, characterized in that: The transmission assembly includes a first transmission gear (23), a second transmission gear (24), a rotating shaft (22), a first bevel gear (12), and a second bevel gear (13). The first transmission gear (23) is coaxially connected to the outer sleeve (621). The rotating shaft (22) is rotatably mounted on the base (1). The second transmission gear (24) is coaxially connected to the rotating shaft (22). The first transmission gear (23) meshes with the second transmission gear (24). The first bevel gear (12) is coaxially connected to the rotating shaft (22). The second bevel gear (13) is coaxially connected to the reciprocating lead screw (74). The first bevel gear (12) meshes with the second bevel gear (13).

9. A cold pressing apparatus for metal sheets according to any one of claims 6 or 8, characterized in that: Two mounting brackets (14) are arranged opposite each other on both sides of the base (1). Each mounting bracket (14) has a vertical groove (15). A corresponding bearing seat (16) is slidably arranged in each of the two grooves (15). One end of the outer sleeve (621) is coaxially arranged on the inner ring of the bearing of the corresponding bearing seat (16). One end of the inner spindle (622) is coaxially arranged on the inner ring of the bearing of the other bearing seat (16). A bearing is arranged between the inner spindle (622) and the outer sleeve (621). A floating pressure assembly (17) is arranged in the groove (15). 17) Used to apply a vertically downward elastic preload to the bearing housing (16); the mounting bracket (14) is threaded with an adjusting screw (18), the end of the adjusting screw (18) abuts against the lower surface of the bearing housing (16); the output end of the rotary drive source (61) is connected to the outer sleeve (621) through a cross telescopic coupling (20), and the connector (63) is connected to an external air source through a hose; both sides of the mounting bracket (14) have mounting ports (25) that connect to the outside and the slide groove (15), and the mounting ports allow the bearing housing (16) and the floating pressure assembly (17) to pass through.

10. A cold pressing apparatus for metal sheets according to claim 9, characterized in that: The floating pressure assembly (17) includes a positioning block (171), a spring (172), and a pressure rod (173). The positioning block (171) is detachably fixed in the slide groove (15). A receiving cavity (21) is provided in the positioning block (171). The spring (172) is disposed in the receiving cavity (21). The pressure rod (173) is slidably disposed in the receiving cavity (21). The sliding of the pressure rod (173) can cooperate with the positioning block (171) to squeeze the spring (172). The outer end of the pressure rod (173) is connected to the bearing seat (16).

Images