Permalloy plate punching mechanism

Abstract

The permalloy plate punching mechanism comprises an upper die plate, a lower die plate and a material pressing plate, a telescopic assembly used for adjusting the distance between the upper die plate and the material pressing plate is arranged between the upper die plate and the material pressing plate, guide sleeves are fixedly installed at the four corners of the bottom face of the upper die plate, the guide sleeves are sleeved with and slidably connected with guide columns, and the guide columns are fixedly connected with the lower die plate; a first female die and a second female die are fixedly installed on the top face of the lower die plate and correspondingly provided with a first male die and a second male die in a matched mode. The first male die and the second male die penetrate through the material pressing plate and are fixedly connected with the upper die plate. A blowing assembly used for cooling the second male die is arranged in an inner cavity of the first female die, and the first female die communicates with the second female die through the blowing assembly. An inner cavity of the second female die is rotationally connected with an air closing assembly. According to the permalloy plate punching die, the second male die can be cooled through the air blowing assembly, the blanking gap between the second male die and the second female die is maintained, and the punching quality of a permalloy plate is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of stamping technology, and in particular to a permalloy plate punching mechanism. Background Technology

[0002] Permalloy, also known as iron-nickel alloy, is an alloy material with high magnetic permeability under weak magnetic fields. It is named after its discoverer, the American G.W. Elmen, who in 1913 discovered that Ni-Fe alloys containing 30%–90% nickel exhibit good soft magnetic properties under weak and medium magnetic fields. He specifically pointed out that nickel-iron alloys containing 78% nickel have the highest initial magnetic permeability, hence the name permalloy, meaning magnetically permeable alloy. Permalloy plates possess high magnetic permeability, low coercivity, high resistivity (in some permalloys with added elements), low density, and good thermal conductivity. Simultaneously, it also possesses good toughness and strength, making it suitable for use in various complex environments.

[0003] With the continuous development of medical devices, it is often necessary to use permalloy plates to shield certain devices that are susceptible to electromagnetic interference in order to make shielding covers. Because the raw material of permalloy plates has high hardness, the high temperature rise of the punch during the punching process leads to great wear, affecting the punching clearance between the punch and die, resulting in large burrs on the permalloy plate, which affects the implementation of subsequent processes. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a permalloy plate punching mechanism that can use an air blowing component to cool the second punch, maintain the punching gap between the second punch and the second die, and ensure the punching quality of the permalloy plate.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A permalloy plate punching mechanism includes an upper template, a lower template, and a pressure plate. A telescopic assembly for adjusting the distance between the upper template and the pressure plate is provided. Guide sleeves are fixedly installed at the four corners of the bottom surface of the upper template. Guide posts are fitted and slidably connected to the guide sleeves and are fixedly connected to the lower template. A first die and a second die are fixedly installed on the top surface of the lower template. The first die and the second die are respectively fitted with a first punch and a second punch. The first punch and the second punch penetrate the pressure plate and are fixedly connected to the upper template. An air-blowing assembly for cooling the second punch is provided in the inner cavity of the first die, and the first die is connected to the second die through the air-blowing assembly. An air-sealing assembly is rotatably connected to the inner cavity of the second die.

[0007] Preferably, the telescopic component includes a plurality of first springs, the two ends of which are fixedly connected to the bottom surface of the upper template and the top surface of the pressure plate, respectively; a pull rod is provided in the inner cavity of the first spring, the pull rod passes through the pressure plate and is fixedly connected to the upper template.

[0008] Preferably, the inner cavity of the first die cavity is a stepped hole, the small-diameter end of the stepped hole is adapted to the first punch, and the side wall of the small-diameter end of the stepped hole is provided with a discharge port; the air blowing assembly includes a piston, the stepped hole is adapted to and slidably connected to the piston, the bottom end of the inner cavity of the stepped hole is respectively fixedly connected to and connected to an air inlet pipe and an air outlet pipe, one end of the air inlet pipe and the air outlet pipe are respectively connected in series with a one-way valve, the other end of the air outlet pipe is fixedly connected to and connected to the inner cavity of the second die cavity, and the other end of the air outlet pipe is also connected in series with the one-way valve; a third spring is provided between the bottom surface of the piston and the bottom surface of the stepped hole.

[0009] Preferably, the air-tightening component includes a rotating shaft, a flap fixedly connected to the middle of the rotating shaft, the flap being adapted to the inner cavity of the second die, a fixing sleeve passing through one end of the rotating shaft, one end of the fixing sleeve being fixedly connected to the second die, a second spring fixedly connected to the inner wall of the fixing sleeve, and one end of the second spring being fixedly connected to the rotating shaft.

[0010] Preferably, the inner cavity of the second die is a through hole extending from top to bottom, and the top surface of the lower die has a material leakage hole, which is connected to the inner cavity of the second die.

[0011] Preferably, the inner diameter of the punch hole in the first die is smaller than the inner diameter of the punch hole in the second die.

[0012] Preferably, a plurality of first vent holes are provided between the bottom surface and the side surface of the second punch, and a second vent hole is provided between the center of the second punch and the top surface. The second vent hole passes through the upper template and is connected to the atmosphere.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects:

[0014] This invention utilizes a pressure plate to press a permalloy plate against the top surfaces of the first and second dies. The first and second punches simultaneously punch the permalloy plate, achieving two punching operations on the permalloy plate in a single mold closing process. Furthermore, the inner diameter of the punching hole in the first die is smaller than that in the second die, enabling staged punching of the permalloy plate. This reduces wear on the first or second punch and consequently reduces punching burrs on the permalloy plate.

[0015] This invention utilizes an air-blowing assembly to cool the second punch during the punching process, thereby reducing the temperature of the second punch during use, lowering the risk of reduced hardness of the second punch, and improving the quality of punching. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0018] Figure 2 A schematic cross-sectional view of the first and second dies;

[0019] Figure 3 A side view of the three-dimensional structure of the air-tight component;

[0020] Figure 4 This is a side view of the three-dimensional structure of the upper template;

[0021] Figure 5 This is a side view of the three-dimensional structure of the lower template;

[0022] The components are as follows: 1. Upper mold plate; 2. Lower mold plate; 3. Pressure plate; 4. Guide sleeve; 5. Guide post; 6. First die cavity; 7. Second die cavity; 8. First punch; 9. Second punch; 10. First spring; 11. Tie rod; 12. Stepped hole; 13. Discharge port; 14. Piston; 15. Air inlet pipe; 16. Air outlet pipe; 17. One-way valve; 18. Rotating shaft; 19. Flip plate; 20. Fixing sleeve; 21. Second spring; 22. Material leakage hole; 23. First vent hole; 24. Second vent hole. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that all components in the technical solution of this application require necessary additional facilities for water supply, oil supply, power supply, and gas supply for driving and / or control. Unless otherwise stated, they are assumed to be used and equipped with existing technology and no special explanation is required.

[0025] It should be noted that, in order to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Depend on Figure 1-5The permalloy plate punching mechanism shown includes an upper template 1, a lower template 2, and a pressure plate 3. A telescopic assembly for adjusting the distance between the upper template 1 and the pressure plate 3 is provided. Guide sleeves 4 are fixedly installed at the four corners of the bottom surface of the upper template 1. Guide posts 5 are fitted onto and slidably connected to the guide sleeves 4, and the guide posts 5 are fixedly connected to the lower template 2. A first die 6 and a second die 7 are fixedly installed on the top surface of the lower template 2. The first die 6 and the second die 7 are respectively fitted with a first punch 8 and a second punch 9. The first punch 8 and the second punch 9 pass through the pressure plate 3 and are fixedly connected to the upper template 1. An air-blowing assembly for cooling the second punch 9 is provided in the inner cavity of the first die 6, and the first die 6 is connected to the second die 7 through the air-blowing assembly. An air-sealing assembly is rotatably connected to the inner cavity of the second die 7. The punching inner diameter of the first die 6 is smaller than the punching inner diameter of the second die 7.

[0027] Furthermore, the upper template 1 and lower template 2 of this utility model are respectively fixedly installed on the worktable of a stamping machine or a hydraulic press, and the punching process is realized by the opening and closing pressure of the press. This is existing technology and will not be described in detail here.

[0028] Further optimization of the scheme: the telescopic component includes several first springs 10, with the two ends of the first springs 10 fixedly connected to the bottom surface of the upper template 1 and the top surface of the pressure plate 3, respectively; the inner cavity of the first spring 10 is provided with a pull rod 11, which passes through the pressure plate 3 and is fixedly connected to the upper template 1. The pull rod 11 can stably guide the pressure plate 3 during the punching process and prevent the first springs 10 from bending or twisting laterally due to uneven pressure during the compression process, thus preventing the pressure plate 3 from becoming unstable.

[0029] Furthermore, the top surface of the pressure plate 3 has a through hole, which provides a passage for the first punch 8 and the second punch 9, and can press the permalloy plate, facilitating punching.

[0030] Further optimization of the design: the inner cavity of the first die 6 is a stepped hole 12, the small-diameter end of which is adapted to the first punch 8. A discharge port 13 is provided on the side wall of the small-diameter end of the stepped hole 12. The stepped hole 12 in the inner cavity of the first die 6 is a closed hole at the bottom, allowing air to be expelled during the sliding of the piston 14. The air blowing assembly includes a piston 14, with the stepped hole 12 adapted to and slidably connected to the piston 14. A third spring is abutting between the bottom surface of the piston 14 and the bottom surface of the stepped hole 12. The top surface of the piston 14 is detachably connected to the first punch 8, allowing the piston 14 to move using the punching pressure of the first punch 8. Simultaneously, the third spring can reset the piston 14. An air inlet pipe 15 and an air outlet pipe 16 are fixedly connected and connected to the bottom of the inner cavity of the stepped hole 12. One end of the air inlet pipe 15 and the air outlet pipe 16 are connected in series with a one-way valve 17. The other end of the air outlet pipe 16 is fixedly connected and connected to the inner cavity of the second die 7. The one-way valve 17 of the air inlet pipe 15 can allow air to enter the stepped hole 12 from the atmosphere. The one-way valve 17 connected in series with the air outlet pipe 16 can allow the air in the stepped hole 12 to flow to the inner cavity of the second die 7.

[0031] Further optimization of the design includes a sealing component comprising a rotating shaft 18, with a flap 19 fixedly connected to the middle of the rotating shaft 18. A groove is provided on the inner wall of the second die 7, which is adapted to the flap 19 after it flips over, ensuring that the flap 19 does not interfere with the punched waste material after it flips down. The flap 19 is adapted to the inner cavity of the second die 7. A fixing sleeve 20 is inserted through one end of the rotating shaft 18, and one end of the fixing sleeve 20 is fixedly connected to the second die 7. A second spring 21 is fixedly connected to the inner wall of the fixing sleeve 20, and one end of the second spring 21 is fixedly connected to the rotating shaft 18. The flap 19 will flip under the pressure of the punched waste material, and after the waste material flows under the flap 19, the torque of the second spring 21 will be used to reset the flap 19.

[0032] Further optimization of the design: the inner cavity of the second die 7 is a through hole running vertically through the top and bottom. The top surface of the lower template 2 is provided with a material discharge hole 22, which is connected to the inner cavity of the second die 7. The material discharge hole 22 can discharge the waste material punched out by the second die 7 into this mechanism.

[0033] Further optimization of the design involves making the inner diameter of the punch hole in the first die 6 smaller than that in the second die 7, and punching the same hole twice, which can reduce the jamming of waste material with this invention.

[0034] In a further optimized design, several first vent holes 23 are provided between the bottom and side surfaces of the second punch 9, and a second vent hole 24 is provided between the center and top surface of the second punch 9. The second vent hole 24 penetrates the upper template 1 and is connected to the atmosphere. The first vent holes 23 and the second vent holes 24 can exhaust the air expelled by the piston 14, and at the same time dissipate the heat generated by the second punch 9 during the punching process.

[0035] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A permalloy plate punching mechanism, characterized in that, The assembly includes an upper template (1), a lower template (2), and a pressure plate (3). A telescopic assembly for adjusting the distance between the upper template (1) and the pressure plate (3) is provided. Guide sleeves (4) are fixedly installed at the four corners of the bottom surface of the upper template (1). Guide posts (5) are fitted and slidably connected to the guide sleeves (4). The guide posts (5) are fixedly connected to the lower template (2). A first die (6) and a second die (7) are fixedly installed on the top surface of the lower template (2). The first die (6) and the second die (7) are respectively fitted with a first punch (8) and a second punch (9). The first punch (8) and the second punch (9) pass through the pressure plate (3) and are fixedly connected to the upper template (1). An air-blowing assembly for cooling the second punch (9) is provided in the inner cavity of the first die (6). The first die (6) is connected to the second die (7) through the air-blowing assembly. An air-sealing assembly is rotatably connected to the inner cavity of the second die (7).

2. The permalloy plate punching mechanism according to claim 1, characterized in that: The telescopic assembly includes several first springs (10), with the two ends of the first springs (10) fixedly connected to the bottom surface of the upper template (1) and the top surface of the pressure plate (3), respectively; a pull rod (11) is provided in the inner cavity of the first spring (10), the pull rod (11) passes through the pressure plate (3) and is fixedly connected to the upper template (1).

3. The permalloy plate punching mechanism according to claim 1, characterized in that: The inner cavity of the first die (6) is a stepped hole (12), the small diameter end of the stepped hole (12) is adapted to the first punch (8), and the side wall of the small diameter end of the stepped hole (12) is provided with a discharge port (13); the air blowing assembly includes a piston (14), the stepped hole (12) is adapted to the piston (14) and slidably connected, the bottom end of the inner cavity of the stepped hole (12) is fixedly connected to and connected to an air inlet pipe (15) and an air outlet pipe (16), one end of the air inlet pipe (15) and the air outlet pipe (16) are respectively connected in series with a one-way valve (17), the other end of the air outlet pipe (16) is fixedly connected to and connected to the inner cavity of the second die (7), and the other end of the air outlet pipe (16) is also connected in series with the one-way valve (17); a third spring is provided between the bottom surface of the piston (14) and the bottom surface of the stepped hole (12).

4. The permalloy plate punching mechanism according to claim 3, characterized in that: The air-tightening assembly includes a rotating shaft (18), a flap (19) is fixedly connected to the middle of the rotating shaft (18), the flap (19) is adapted to the inner cavity of the second concave mold (7), a fixing sleeve (20) is provided at one end of the rotating shaft (18), one end of the fixing sleeve (20) is fixedly connected to the second concave mold (7), a second spring (21) is fixedly connected to the inner wall of the fixing sleeve (20), and one end of the second spring (21) is fixedly connected to the rotating shaft (18).

5. The permalloy plate punching mechanism according to claim 1, characterized in that: The inner cavity of the second die (7) is a through hole that runs vertically through the interior. The top surface of the lower template (2) is provided with a material leakage hole (22), which is connected to the inner cavity of the second die (7).

6. The permalloy plate punching mechanism according to claim 1, characterized in that: The inner diameter of the punch hole in the first die (6) is smaller than the inner diameter of the punch hole in the second die (7).

7. The permalloy plate punching mechanism according to claim 1, characterized in that: The second punch (9) has several through first vent holes (23) between its bottom surface and side surface, and a second vent hole (24) between its center and top surface. The second vent hole (24) passes through the upper template (1) and is connected to the atmosphere.

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