Punching mechanism for heat exchanger fin production

Abstract

This utility model belongs to the technical field of perforation technology for sheet-like fins, and in particular, a punching mechanism for producing heat exchanger fins. The proposed solution includes a base plate, with upwardly protruding guide rods welded to the four corners of the top of the base plate. A top plate is fixedly installed on the top of the guide rods. An inverted hydraulic cylinder is installed at the center of the top of the top plate. The piston rod of the hydraulic cylinder extends through to the bottom of the top plate and is fixedly installed on a sliding plate. The sliding plate is slidably mounted on the outer wall of the guide rods, and a punching head is fixedly installed at the bottom of the sliding plate. This utility model, by setting a switching mechanism electrically connected to a conveying mechanism, ensures that when the sliding plate moves downwards for punching, the switching mechanism does not trigger the conveying mechanism. However, during the upward movement of the sliding plate, the switching mechanism is triggered, achieving the purpose of the conveying mechanism driving the heat exchanger fins to move at equal intervals.

Description

Technical Field

[0001] This utility model relates to the field of perforation technology for sheet-like fins, and in particular to a punching mechanism for producing heat exchanger fins. Background Technology

[0002] Heat dissipation fins can be in the form of sheets, circles, spirals, etc. To increase the heat dissipation area, sheet-shaped heat dissipation fins are usually punched with holes, which are generally done using a hydraulic punching machine.

[0003] Existing hydraulic punching machines require manual movement of the heat dissipation fins after punching. Manual operation has the problem of not being able to guarantee the movement distance, resulting in uneven spacing of the processed holes and grooves. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies of the prior art by providing a punching mechanism for heat exchanger fin production, thereby solving the problems mentioned in the background art.

[0005] A punching mechanism for producing heat exchanger fins includes a base plate. Four upwardly protruding guide rods are welded to the top corners of the base plate. A top plate is fixedly installed on the top of the guide rods. An inverted hydraulic cylinder is installed at the center of the top of the top plate. The piston rod of the hydraulic cylinder extends through to the bottom of the top plate and is fixedly installed with a sliding plate. The sliding plate is slidably mounted on the outer wall of the guide rods. A punching head is fixedly installed at the bottom end of the sliding plate. A return spring, which is sleeved with the guide rod, abuts against the bottom end of the sliding plate and the top end of the base plate. A guide groove for placing fins is formed at the center of the top of the base plate. A receiving groove extending through to the bottom of the base plate is formed inside the guide groove. A downwardly extending fixing plate is fixedly installed on one side of the bottom end of the top plate. A switching mechanism is installed on one side of the fixing plate and the sliding plate. Conveying mechanisms for driving the fins to move equidistantly are installed at both ends of the base plate.

[0006] By adopting the above technical solution and designing an electrical connection between the switching mechanism and the conveying mechanism, equidistant driving of the heat dissipation fins is achieved.

[0007] The switching mechanism includes a receiving groove that is engaged with the sliding plate near the fixed plate. A rotating block is rotatably mounted on the inner wall of the receiving groove. A limiting plate that restricts the downward rotation of the rotating block is fixedly mounted on the bottom end of the sliding plate. A pressing inclined surface is formed on the top side of the rotating block. The switching mechanism also includes a sliding block that is axially slidably connected to the fixed plate. A guide shaft that provides guidance for the sliding block is fixedly mounted on the outer side of the fixed plate. A limiting head is threaded into a screw hole at the end of the guide shaft away from the fixed plate. A connecting spring abuts between the limiting head and the sliding block. The connecting spring is sleeved on the outer periphery of the guide shaft. A pressure-bearing inclined surface is formed on the bottom side of the sliding block above the pressing inclined surface. The switching mechanism also includes an L-shaped plate fixedly mounted on the outer side of the fixed plate. A pressure sensor aligned with the sliding block is mounted on the vertical part of the L-shaped plate. The switch is electrically connected to the controller through a guide.

[0008] By adopting the above technical solution and designing a switching mechanism, the upward movement triggers the conveying mechanism, while the downward movement does not trigger the conveying mechanism.

[0009] The conveying mechanism has driven rollers rotatably mounted on the inner sides of the supports at both ends of the base plate. Below the driven rollers are drive rollers rotatably mounted on the inner sides of the supports. One end of one support is equipped with a servo motor that is coaxially fixed to one of the drive rollers. The other ends of the two drive rollers are coaxially fixed to a synchronous pulley, and the two synchronous pulleys are connected by a synchronous belt drive.

[0010] By adopting the above technical solution and designing a conveying mechanism, the purpose of driving the heat dissipation fins to move at equal distances was achieved.

[0011] The beneficial effects of the plow-type unloader with a cleaning mechanism of this utility model are:

[0012] By setting the switch mechanism to be electrically connected to the conveying mechanism, the switch mechanism does not trigger the conveying mechanism when the sliding plate moves downward to punch holes, but is triggered when the sliding plate moves upward, thus achieving the purpose of the conveying mechanism driving the heat dissipation fins to move at equal intervals. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the punching mechanism for producing heat exchanger fins proposed in this utility model.

[0014] Figure 2 This is a schematic diagram of the installation of the switching mechanism of the punching mechanism for heat exchanger fin production proposed in this utility model.

[0015] Figure 3 The present invention provides a punching mechanism for producing heat exchanger fins. Figure 2 Enlarged view of a portion of point A in the middle.

[0016] In the diagram: 1. Base plate; 2. Guide rod; 3. Top plate; 4. Hydraulic cylinder; 5. Sliding plate; 6. Punching head; 7. Return spring; 8. Guide groove; 9. Fixed plate; 10. Drive roller; 11. Driven roller; 12. Servo motor; 13. Synchronous pulley; 14. Synchronous belt; 15. Receiving groove; 16. Limiting plate; 17. Rotating block; 18. Extrusion slope; 19. Sliding block; 20. Pressure slope; 21. Guide shaft; 22. Connecting spring; 23. Limiting head; 24. L-shaped plate. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0018] Reference Figure 1-3 A punching mechanism for producing heat exchanger fins includes a base plate 1. Four upwardly protruding guide rods 2 are welded to the top corners of the base plate 1. A top plate 3 is fixedly installed on the top of the guide rods 2. An inverted hydraulic cylinder 4 is installed at the center of the top of the top plate 3. The piston rod of the hydraulic cylinder 4 extends through to the bottom of the top plate 3 and is fixedly installed with a sliding plate 5. The sliding plate 5 is slidably installed on the outer wall of the guide rods 2. A punching head 6 is fixedly installed at the bottom of the sliding plate 5. A return spring 7, which is sleeved with the guide rod 2, abuts against the bottom of the sliding plate 5 and the top of the base plate 1. A guide groove 8 for placing fins is opened at the center of the top of the base plate 1. A receiving groove 15 extending through to the bottom of the base plate 1 is opened inside the guide groove 8. A downwardly extending fixing plate 9 is fixedly installed on one side of the bottom of the top plate 3. A switching mechanism is installed on one side of the fixing plate 9 and the sliding plate 5. Conveying mechanisms for driving the fins to move equidistantly are installed at both ends of the base plate 1.

[0019] In this embodiment: First, the heat dissipation fins are inserted into the inlet end of the guide groove 8. At this time, the conveying mechanism located at the inlet end of the guide groove 8 clamps the heat dissipation fins. After the heat dissipation fins move to below the punch head 6, the hydraulic cylinder 4 is activated. The piston rod of the hydraulic cylinder 4 extends downward and drives the sliding plate 5 to move downward synchronously. The sliding plate 5 drives the punch head 6 and cooperates with the receiving groove 15 to punch the heat dissipation fins. The punched part falls downward through the receiving groove 15. Then the hydraulic cylinder 4 resets. During the upward reset process of the hydraulic cylinder 4, the switching mechanism is squeezed. At this time, an electrical signal is sent to the controller. The controller controls the servo motor 12 to rotate according to the set program, driving the heat dissipation fins to move a preset distance, thereby realizing the automatic conveying of the heat dissipation fins.

[0020] Because the two parts of the conveying mechanism are symmetrically designed in the front and rear directions, it ensures that the heat sink fins can always be driven to slide axially.

[0021] As the fixed plate 9 moves downward with the sliding plate 5, the switching mechanism is not triggered, thus achieving the purpose of triggering when moving upward but not when moving downward.

[0022] The switching mechanism includes a receiving groove 15 that is engaged with the sliding plate 5 near the fixed plate 9. A rotating block 17 is rotatably mounted on the inner wall of the receiving groove 15. A limiting plate 16 that restricts the downward rotation of the rotating block 17 is fixedly mounted on the bottom end of the sliding plate 5. An extrusion slope 18 is formed on the top side of the rotating block 17. The switching mechanism also includes a sliding block 19 that is axially slidably connected to the fixed plate 9. A guide shaft 21 that provides guidance for the sliding of the sliding block 19 is fixedly mounted on the outer side of the fixed plate 9. A limiting head 23 is threadedly connected in a screw hole at the end of the guide shaft 21 away from the fixed plate 9. A connecting spring 22 abuts against the sliding block 19 between the limiting head 23 and the sliding block 19. The connecting spring 22 is sleeved on the outer periphery of the guide shaft 21. A pressure-bearing slope 20 is formed on the bottom side of the sliding block 19 above the extrusion slope 18. The switching mechanism also includes an L-shaped plate 24 that is fixedly mounted on the outer side of the fixed plate 9. A pressure sensor that is aligned with the sliding block 19 is mounted on the vertical part of the L-shaped plate 24. The switch is electrically connected to the controller through the guide.

[0023] In this embodiment: As the fixed plate 9 moves upward with the sliding plate 5, the sliding plate 5 drives the rotating block 17 to move upward synchronously and gradually approach the sliding block 19 until the two come into contact. At this time, the pressing inclined surface 18 comes into contact with the pressure-receiving inclined surface 20, and under the limitation of the limiting plate 16, the rotating block 17 cannot rotate downward. At this time, the sliding block 19 slides along the outer wall of the guide shaft 21. At this time, the connecting spring 22 is compressed. When the sliding block 19 moves to the maximum displacement distance, the sliding block 19 comes into contact with the pressure sensor. At this time, the pressure sensor sends an electrical signal to the controller, and the controller controls the conveying mechanism to move to achieve equidistant conveying of the heat dissipation fins. After the sliding block 19 and the rotating block 17 are misaligned, the connecting spring 22 resets, driving the sliding block 19 to reset.

[0024] Conversely, when the fixed plate 9 moves downward, the rotating block 17 rotates upward, and no thrust is applied to the sliding block 19, so the switching mechanism is not triggered.

[0025] The conveying mechanism has driven rollers 11 rotatably mounted on the inner side of the brackets at both ends of the base plate 1. Below the driven rollers 11, drive rollers 10 are rotatably mounted on the inner side of the brackets. A servo motor 12 is mounted on one end of one bracket and is fixedly mounted coaxially with one drive roller 10. Synchronous pulleys 13 are fixedly mounted coaxially on the other ends of the two drive rollers 10. The two synchronous pulleys 13 are connected by a synchronous belt 14.

[0026] In this embodiment: after the pressure sensor sends an electrical signal to the controller, the controller controls the servo motor 12 to rotate and drives the prefabricated coaxial drive roller 10 to rotate. The drive roller 10 drives another drive roller 10 to rotate synchronously and in the same direction through the synchronous wheel 13 and the synchronous belt 14. With the help of the driven roller 11 that clamps the heat sink fins, the heat sink fins can be transported at equal distances.

[0027] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A punching mechanism for producing heat exchanger fins, comprising a base plate (1), characterized in that: The bottom plate (1) has four upwardly protruding guide rods (2) welded to its top corners. A top plate (3) is fixedly installed on the top of the guide rods (2). An inverted hydraulic cylinder (4) is installed at the center of the top of the top plate (3). The piston rod of the hydraulic cylinder (4) extends through to the bottom of the top plate (3) and a sliding plate (5) is fixedly installed thereon. The sliding plate (5) is slidably installed on the outer wall of the guide rods (2). A punch head (6) is fixedly installed at the bottom end of the sliding plate (5). The bottom end of the sliding plate (5) is connected to the bottom plate. A return spring (7) is abutted between the top ends of (1) and sleeved with the guide rod (2). A guide groove (8) for placing fins is provided at the center of the top end of the bottom plate (1). A receiving groove (15) extending through to the bottom of the bottom plate (1) is provided inside the guide groove (8). A downwardly extending fixing plate (9) is fixedly installed on one side of the bottom end of the top plate (3). A switching mechanism is installed on one side of the fixing plate (9) and the sliding plate (5). A conveying mechanism for driving the fins to move at equal distances is installed at both ends of the bottom plate (1).

2. The punching mechanism for heat exchanger fin production according to claim 1, characterized in that: The switching mechanism includes a receiving groove (15) that is engaged with the sliding plate (5) on the side near the fixed plate (9). A rotating block (17) is rotatably mounted on the inner wall of the receiving groove (15). A limiting plate (16) that restricts the downward rotation of the rotating block (17) is fixedly mounted on the bottom end of the sliding plate (5). An extrusion slope (18) is formed on one side of the top of the rotating block (17).

3. The punching mechanism for heat exchanger fin production according to claim 2, characterized in that: The switching mechanism further includes a sliding block (19) that is axially slidably connected to the fixed plate (9). A guide shaft (21) is fixedly installed on the outer side of the fixed plate (9) to guide the sliding block (19) to slide. A limit head (23) is threadedly connected in a screw hole at one end of the guide shaft (21) away from the fixed plate (9). A connecting spring (22) abuts against the sliding block (19). The connecting spring (22) is sleeved on the outer periphery of the guide shaft (21). A pressure-bearing slope (20) is formed on one side of the bottom end of the sliding block (19) above the extrusion slope (18).

4. The punching mechanism for heat exchanger fin production according to claim 3, characterized in that: The switching mechanism also includes an L-shaped plate (24) fixedly installed on the outside of the fixed plate (9). A pressure sensor aligned with the sliding block (19) is installed on the vertical plate of the L-shaped plate (24). The switch is electrically connected to the controller via a guide.

5. The punching mechanism for heat exchanger fin production according to claim 1, characterized in that: The conveying mechanism is rotatably mounted on the inner side of the brackets at both ends of the base plate (1) with driven rollers (11) rotatably mounted on the inner side of the brackets. A servo motor (12) is mounted on one end of one bracket and is fixedly mounted coaxially with one of the driven rollers (10). A synchronous pulley (13) is fixedly mounted coaxially on the other end of the two driven rollers (10). The two synchronous pulleys (13) are connected by a synchronous belt (14).

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