Reluctance type electromagnetic metal sheet punch forming device

Abstract

The invention relates to the technical field of metal stamping, in particular to a magnetic resistance type electromagnetic metal plate stamping forming device which comprises a supporting assembly, a clamping assembly, a solenoid coil, a stamping head, a projectile assembly, a cake-shaped coil assembly and a limiting assembly. The solenoid coil, the cake-shaped coil assembly and the annular coil assembly generate a composite magnetic field after being electrified, the composite magnetic field is used for generating attraction to the projectile assembly, meanwhile, an induced magnetic field is generated in the projectile assembly, the induced magnetic field and the composite magnetic field generate repulsive force, and the projectile assembly impacts the punching head under the combined action of the repulsive force and the attraction force. The stamping head impacts the metal plate to complete stamping. According to the device, on the premise that the size and the quality of equipment are not increased, the stamping force of the bullet assembly on the stamping head is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal stamping, and particularly relates to a magnetoresistive electromagnetic metal sheet stamping and forming device. Background Art

[0002] Metal stamping and forming is a manufacturing process in which a mold applies pressure to a metal sheet to cause plastic deformation or separation, thereby obtaining parts with the desired shape and size. This process has advantages such as high efficiency, high precision, and low cost, and is widely used in fields such as automobiles, electronics, household appliances, and aerospace. A metal stamping and forming press (punch press) and a mold apply an external force to the metal sheet to cause plastic deformation or shearing, involving basic principles such as plastic deformation, separation processing, and flow control.

[0003] As a way of driving an object to move by using the electromagnetic induction effect, electromagnetic loading technology has the advantages of high energy conversion rate, large loading rate, and low environmental pollution, and can be used to solve problems such as high energy consumption of traditional motor-driven flywheel stamping and serious oil pollution of hydraulic-driven stamping. The prior art has proposed an electromagnetic punch press that drives the punch by changing the polarity of the solenoid electromagnet. This invention is driven by a single-pole solenoid coil, and the punching force per unit mass provided is limited. There is also prior art that has proposed a double-coil electromagnetic punch press to solve the problem of low stamping efficiency of the electromagnetic punch press, but it does not significantly increase the punching force per unit mass of the punch press.

[0004] Therefore, it is necessary to provide a magnetoresistive electromagnetic metal sheet stamping and forming device to solve the above problems. Summary of the Invention

[0005] To solve the technical problem of the small punching force per unit mass of the existing electromagnetic punch press, the present invention provides a magnetoresistive electromagnetic metal sheet stamping and forming device to solve the existing problems.

[0006] The magnetoresistive electromagnetic metal sheet stamping and forming device of the present invention adopts the following technical solutions, including: A support assembly, which is sequentially provided with a baffle, a first guide cylinder, a second guide cylinder, an installation cylinder, and a bracket along its length direction. Among them, a sleeve is arranged between the first guide cylinder and the second guide cylinder, and the first guide cylinder, the sleeve, the second guide cylinder, and the installation cylinder are sequentially connected and horizontally coaxially arranged; A clamping assembly, which is arranged on the baffle and is used for clamping a metal sheet; A solenoid coil, which is wound around the outside of the sleeve; A punch head, which is horizontally slidably arranged in the first guide cylinder; A projectile assembly, which is horizontally slidably arranged in the communication cavity between the second guide cylinder and the sleeve. An annular coil assembly concentric with the projectile assembly is arranged on the side of the second guide cylinder facing the installation cylinder; The pancake-shaped coil assembly is installed in the installation cylinder, and the pancake-shaped coil assembly is in contact with the annular coil assembly; and a limit assembly, which is arranged on the bracket and has a limit end in contact with the port of the mounting tube; Among them, the solenoid coil, the pancake coil assembly, the annular coil assembly and the external power supply are connected. When the solenoid coil, the pancake coil assembly and the annular coil assembly are energized, a composite magnetic field is generated. The composite magnetic field is used to generate an attractive force on the projectile assembly. At the same time, an induced magnetic field is generated inside the projectile assembly under the composite magnetic field. The induced magnetic field and the composite magnetic field repel each other to generate a repulsive force on the projectile assembly toward the punch head. Under the combined action of the repulsive force and the attractive force, the projectile assembly hits the punch head, and the punch head hits the metal sheet to complete the stamping.

[0007] Preferably, the support assembly includes: a support platform, on which a base plate is arranged, wherein the first guide cylinder, the second guide cylinder, and the mounting cylinder are arranged on the base plate, and the baffle and the bracket are arranged on the support platform on both sides of the base plate, and the baffle is arranged close to the first guide cylinder, and the bracket is arranged close to the mounting cylinder.

[0008] Preferably, the clamping assembly includes: a U-shaped part, wherein the baffle is located in the U-shaped groove of the U-shaped part, a clamping part is provided at the end of the U-shaped part located on the side of the punching head, and the end of the U-shaped part away from the side of the punching head is connected to the baffle through an adjusting screw, and the adjusting screw is used to adjust the distance between the clamping part of the U-shaped part and the baffle.

[0009] Preferably, the solenoid coil is a three-coil solenoid coil.

[0010] Preferably, the projectile assembly includes: an iron projectile and an aluminum projectile coaxially connected together, wherein the composite magnetic field is used to magnetize the iron projectile to attract the projectile assembly, and the aluminum projectile is used to generate an induced magnetic field in the composite magnetic field, and the induced magnetic field and the composite magnetic field generate a repulsive force that pushes the projectile assembly.

[0011] Preferably, the annular coil assembly comprises: an annular body on which a conducting wire is wound, the annular body with the conducting wire wound is installed in an annular groove provided on the end surface of the second guide cylinder, and the annular groove and the second guide cylinder are provided concentrically.

[0012] Preferably, the pancake coil assembly comprises: a mounting seat, which is concentrically fixed in the mounting cylinder, and a mounting groove is provided on the outer peripheral surface of the second guide cylinder end, a pancake coil is installed in the mounting groove, and the pancake coil is in contact with the wire of the annular coil assembly.

[0013] Preferably, the annular body is fixed in the annular groove by screws.

[0014] Preferably, the limiting assembly comprises: a screw rod, which is horizontally passed through the bracket and threadedly connected to the bracket; a limiting plate is arranged on one side of the screw rod facing the mounting tube, and a handle is arranged on the end of the screw rod facing away from the limiting plate.

[0015] Preferably, the bracket includes: a vertically arranged support plate, the support plate is provided with a plurality of mounting holes along the vertical direction, and nuts are installed in the mounting holes, and the nuts are used for threaded connection with the screw.

[0016] The beneficial effects of the present invention are as follows: Compared with the existing electromagnetic stamping method, the stamping forming method of the present invention combines the induction and magnetoresistive magnetic field acceleration principles, that is, by setting a solenoid coil, a disc-shaped coil assembly, and an annular coil assembly, a composite magnetic field is generated after the solenoid coil, the disc-shaped coil assembly, and the annular coil assembly are energized. The composite magnetic field generates an attractive force on the projectile assembly, and at the same time, an induced magnetic field is generated inside the projectile assembly. The induced magnetic field and the composite magnetic field generate a repulsive force. Under the combined action of the repulsive force and the attractive force, the projectile assembly impacts the stamping head, and the stamping head impacts the metal sheet to complete the stamping. Without increasing the volume and mass of the equipment, the present invention greatly improves the impact force of the projectile assembly on the stamping head through the attractive force of the composite magnetic field on the projectile assembly, the repulsive force of the induced magnetic field and the composite magnetic field on the projectile assembly, and the attractive force and the repulsive force act on the projectile assembly together, thereby increasing the unit mass punching force of the equipment. While ensuring the forming quality, the volume of the metal forming stamping equipment is reduced, which is convenient for realizing automation. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a magnetoresistive electromagnetic metal sheet stamping forming device of the present invention; Figure 2 It is a schematic diagram of the structure of the disc-shaped coil assembly in the embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the annular coil assembly in the embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the solenoid coil in the embodiment of the present invention; Figure 5 It is an axonometric view of a magnetoresistive electromagnetic metal sheet stamping forming device of the present invention.

[0019] In the figure: 1. Adjusting screw; 2. U-shaped part; 3. Baffle; 4. Metal sheet; 5. Stamping head; 6. First guiding cylinder; 7. Sleeve; 8. Solenoid coil; 9. Connecting screw; 10. Base plate; 11. Iron pellet; 12. Second guiding cylinder; 13. Aluminum pellet; 14. Ring-shaped coil assembly; 15. Disk-shaped coil; 16. Mounting cylinder; 17. Mounting seat; 18. Bracket; 19. Nut; 20. Screw rod; 21. Handle. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0021] An embodiment of a magnetoresistive electromagnetic metal sheet stamping and forming device of the present invention is as Figure 1As shown in the figure, it includes: a support assembly, on which a baffle 3, a first guide cylinder 6, a second guide cylinder 12, a mounting cylinder 16 and a bracket 18 are arranged in sequence along the length direction of the support assembly. Among them, a sleeve 7 is arranged between the first guide cylinder 6 and the second guide cylinder 12. That is, the end of the sleeve 7 is provided with an annular mounting flange. One end of the sleeve 7 is connected to the end face of the first guide cylinder 6 through the annular mounting flange and screws. A protrusion is arranged on the annular mounting flange at the other end of the sleeve 7, and the protrusion is nested and inserted into the concave hole corresponding to the end face of the second guide cylinder 12, realizing the connection of the sleeve 7 with the first guide cylinder 6 and the second guide cylinder 12, and improving the structural strength. The first guide cylinder 6, the sleeve 7, the second guide cylinder 12 and the mounting cylinder 16 are connected in sequence and arranged horizontally and coaxially, and the inner diameter of the first guide cylinder 6 is smaller than the inner diameter of the sleeve 7; a clamping assembly for clamping a metal plate 4 is arranged on the baffle 3. A solenoid coil 8 is wound around the outside of the sleeve 7. A punch 5 is horizontally slidably arranged in the first guide cylinder 6. Among them, the punch 5 is made of high-strength and non-magnetic 304 stainless steel material; a projectile assembly is horizontally slidably arranged in the communication cavity between the second guide cylinder 12 and the sleeve 7. That is, in this embodiment, the inner diameter of the sleeve 7 needs to be slightly larger than the diameter of the projectile assembly to prevent excessive friction between the sleeve 7 and the projectile assembly, thereby improving the energy utilization rate. An annular coil assembly 14 concentric with the projectile assembly is arranged on one side of the second guide cylinder 12 facing the mounting cylinder 16; a disc-shaped coil assembly is fixed in the mounting cylinder 16, and the disc-shaped coil assembly is in contact with the annular coil assembly 14; a limiting assembly is arranged on the bracket 18, and the limiting end of the limiting assembly is in contact with the port of the mounting cylinder 16; among them, the solenoid coil 8, the disc-shaped coil assembly and the annular coil assembly 14 are connected to an external power supply. After the solenoid coil 8, the disc-shaped coil assembly and the annular coil assembly 14 are energized, a composite magnetic field is generated. The composite magnetic field is used to generate an attractive force on the projectile assembly. At the same time, an induced magnetic field is generated inside the projectile assembly under the composite magnetic field. The induced magnetic field and the composite magnetic field repel each other to generate a repulsive force on the projectile assembly towards the punch 5. Under the combined action of the repulsive force and the attractive force, the projectile assembly impacts the punch 5, and the punch 5 impacts the metal plate 4 to complete the stamping.

[0022] Exemplarily, as Figure 1 shown, in a specific embodiment, the support assembly includes: a support table, on which a bottom plate 10 is arranged. Among them, the first guide cylinder 6, the second guide cylinder 12 and the mounting cylinder 16 are arranged on the bottom plate 10. The baffle 3 and the bracket 18 are arranged on the support tables on both sides of the bottom plate 10, and the baffle 3 is arranged close to the first guide cylinder 6, and the bracket 18 is arranged close to the mounting cylinder 16. Specifically, as Figure 5As shown, the first guide cylinder 6, the second guide cylinder 12 and the mounting cylinder 16 are all provided with mounting ears, the mounting ears are parallel to the base plate 10, and an oblong slot is opened on the mounting ear along the axial direction of the first guide cylinder 6, and the mounting ear and the base plate 10 are connected by passing the positioning screw through the oblong slot, so that the first guide cylinder 6, the second guide cylinder 12 and the mounting cylinder 16 are fixed on the base plate 10.

[0023] For example, Figure 1 As shown, in a specific embodiment, the clamping assembly includes: a U-shaped part 2, wherein the baffle 3 is located in the U-shaped groove of the U-shaped part 2, and the end of the U-shaped part 2 located on the side of the punch head 5 is provided with a clamping part, and the end of the U-shaped part 2 away from the side of the punch head 5 is connected to the baffle 3 through an adjusting screw 1, and the adjusting screw 1 is used to adjust the distance between the clamping part of the U-shaped part 2 and the baffle 3.

[0024] For example, Figure 4 As shown, in a specific embodiment, the solenoid coil 8 is a three-coil solenoid coil. In this embodiment, the coil of the solenoid coil 8 is wound with a copper wire, and the cross-section of the copper wire is a 4 mm×2 mm rectangle.

[0025] For example, Figure 1 As shown, in a specific embodiment, the projectile assembly includes: an iron projectile 11 and an aluminum projectile 13 coaxially connected together, wherein the iron projectile 11 and the aluminum projectile 13 are connected together by a connecting screw 9, the composite magnetic field is used to magnetize the iron projectile 11 to attract the projectile assembly, and the aluminum projectile 13 is used to generate an induced magnetic field in the composite magnetic field, and the induced magnetic field and the composite magnetic field generate a repulsive force that pushes the projectile assembly. It should be noted that the direction of the repulsive force generated by the induced magnetic field and the composite magnetic field to push the projectile assembly is the same as the direction of the suction force generated by the composite magnetic field to magnetize the iron projectile 11 to attract the projectile assembly. The iron projectile 11 is made of No. 10 steel material with good magnetic conductivity, and the aluminum projectile part is made of 7049-t6 aluminum alloy material with good electrical conductivity. Secondly, during installation, the right side surface of the aluminum projectile 13 needs to be tightly attached to the left end surface of the pancake coil assembly to achieve the best magnetic field acceleration efficiency and punching strength.

[0026] For example, Figure 3 As shown, in a specific embodiment, the annular coil assembly 14 includes: an annular body, on which a wire is wound, the annular body with the wire wound is fixed in an annular groove provided on the end face of the second guide cylinder 12 by screws, and the annular groove and the second guide cylinder 12 are concentrically arranged, wherein, in this embodiment, the wire of the annular coil assembly 14 is a copper wire, and the cross-sectional diameter of the wire of the annular coil assembly 14 is Φ3 mm.

[0027] For example, Figure 2As shown, in a specific embodiment, the pancake coil assembly includes: a mounting seat 17, which is concentrically fixed in the mounting tube 16, and a mounting groove is provided on the outer peripheral surface of the second guide tube 12, and a pancake coil 15 is installed in the mounting groove, and the pancake coil 15 is in contact with the conductor of the annular coil assembly 14. In this embodiment, the pancake coil 15 is wound with a copper strip with a width of 10 mm and a thickness of 1 mm to form a composite magnetic field with optimal acceleration.

[0028] Exemplarily, in a specific embodiment, the limit assembly includes: a screw rod 20, which is horizontally penetrated on the bracket 18 and is threadedly connected to the bracket 18; a limit plate is provided on the side of the screw rod 20 facing the mounting tube 16, and the limit plate is used to transmit the reaction force generated by the collision to the bracket 18; a handle 21 is provided on the end of the screw rod 20 away from the limit plate; the bracket 18 is 10 cm away from the end face of the base plate 10 to ensure the overall stability of the device during the stamping process.

[0029] Among them, in a specific embodiment, the bracket 18 includes: a vertically arranged support plate, the support plate is provided with multiple mounting holes along the vertical direction, the nut 19 is installed in the mounting hole by a screw, the nut 19 is used for threaded connection with the screw rod 20, and different mounting holes are convenient for adapting to different stamping environments.

[0030] How it works When in use, first, the right side of the aluminum projectile 13 of the projectile assembly is pressed against the left end face of the pancake coil assembly, and then an external power supply is used to pass current through the solenoid coil 8, the annular coil assembly 14 and the pancake coil 15 to generate a composite magnetic field. The composite magnetic field magnetizes the iron projectile 11. According to the principle of minimum magnetic resistance, the composite magnetic field has a strong attraction on the iron projectile 11 (that is, on the projectile assembly); at the same time, under the influence of the composite magnetic field, a strong magnetic field will be induced inside the aluminum projectile 13. According to Lenz's law, the composite magnetic field repels the induced magnetic field, thereby driving the aluminum projectile 13. In the case of Figure 1 Under the relative position relationship of the components of the device shown, the direction of the attraction generated by the composite magnetic field on the iron projectile 11 is the same as the repulsion generated on the aluminum projectile 13. In order to form effective stamping, the right side of the projectile assembly needs to be in close contact with the left end face of the pancake coil assembly, the initial position of the center of mass of the iron projectile 11 needs to be on the right side of the center of the solenoid coil 8, and the initial position of the center of mass of the aluminum projectile 13 needs to be on the left side of the center of the annular coil assembly 14. Therefore, the projectile assembly accelerates in the sleeve 7 under the combined action of the attraction and repulsion of the solenoid coil 8, the annular coil assembly 14 and the pancake coil 15. Until the projectile assembly collides with the punch head 5, the punch head 5 collides with the metal plate 4, achieving the purpose of stamping. It should be noted that the device can control the intensity of the punching pressure by changing the size of the external power supply, with high energy utilization and large impact force per unit mass.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A magnetoresistive electromagnetic metal sheet stamping and forming device, characterized in that, include: A support assembly, wherein a baffle (3), a first guide cylinder (6), a second guide cylinder (12), a mounting cylinder (16) and a bracket (18) are sequentially arranged along its length direction, wherein a sleeve (7) is arranged between the first guide cylinder (6) and the second guide cylinder (12), and the first guide cylinder (6), the sleeve (7), the second guide cylinder (12) and the mounting cylinder (16) are sequentially connected and horizontally coaxially arranged; A clamping assembly, which is arranged on the baffle (3) and is used to clamp the metal plate (4); A solenoid coil (8) wound outside the sleeve (7); The punch head (5) is horizontally slidably disposed in the first guide cylinder (6); A projectile assembly is horizontally slidably disposed in a communication cavity between the second guide cylinder (12) and the sleeve (7); a ring-shaped coil assembly (14) is disposed concentrically with the projectile assembly on a side of the second guide cylinder (12) facing the mounting cylinder (16); A pancake-shaped coil assembly is installed in the installation cylinder (16), and the pancake-shaped coil assembly is in contact with the annular coil assembly (14); and a limit assembly, which is arranged on the bracket (18) and has a limit end in contact with a port of the mounting tube (16); The solenoid coil (8), the pancake coil assembly, and the annular coil assembly (14) are connected to an external power supply. When the solenoid coil (8), the pancake coil assembly, and the annular coil assembly (14) are energized, a composite magnetic field is generated. The composite magnetic field is used to generate an attractive force on the projectile assembly. At the same time, an induced magnetic field is generated inside the projectile assembly under the composite magnetic field. The induced magnetic field and the composite magnetic field repel each other to generate a repulsive force on the projectile assembly toward the punch head (5). Under the combined action of the repulsive force and the attractive force, the projectile assembly strikes the punch head (5), and the punch head (5) strikes the metal plate (4) to complete the punching.

2. The magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, characterized in that, The support assembly comprises: a support platform, on which a base plate (10) is arranged, wherein a first guide cylinder (6), a second guide cylinder (12), and a mounting cylinder (16) are arranged on the base plate (10), and a baffle plate (3) and a bracket (18) are arranged on the support platform on both sides of the base plate (10), wherein the baffle plate (3) is arranged close to the first guide cylinder (6), and the bracket (18) is arranged close to the mounting cylinder (16).

3. A magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, characterized in that, The clamping assembly comprises: a U-shaped member (2), wherein a baffle (3) is located in a U-shaped groove of the U-shaped member (2), an end of the U-shaped member (2) located on one side of a punch head (5) is provided with a clamping portion, and an end of the U-shaped member (2) on a side away from the punch head (5) is connected to the baffle (3) via an adjusting screw (1), wherein the adjusting screw (1) is used to adjust the distance between the clamping portion of the U-shaped member (2) and the baffle (3).

4. A magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, characterized in that, The solenoid coil (8) adopts a three-coil type solenoid coil.

5. A magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, characterized in that, The projectile assembly comprises: an iron projectile (11) and an aluminum projectile (13) coaxially connected together, wherein the composite magnetic field is used to magnetize the iron projectile (11) to attract the projectile assembly, and the aluminum projectile (13) is used to generate an induced magnetic field in the composite magnetic field, and the induced magnetic field and the composite magnetic field generate a repulsive force that pushes the projectile assembly.

6. The magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, wherein, The annular coil assembly (14) comprises an annular body on which a conductor is wound, the annular body with the conductor wound is installed in an annular groove provided on the end surface of the second guide cylinder (12), and the annular groove and the second guide cylinder (12) are arranged concentrically.

7. The magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 6, characterized in that, The pancake coil assembly comprises: a mounting seat (17) which is concentrically fixed in a mounting cylinder (16), a mounting groove being provided on an outer peripheral surface of an end of the mounting seat facing the second guide cylinder (12), a pancake coil (15) being mounted in the mounting groove, and the pancake coil (15) being in contact with a conducting wire of the annular coil assembly (14).

8. The magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 6, characterized in that, The annular body is fixed in the annular groove by screws.

9. The magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 1, wherein The limit assembly comprises: a screw rod (20) which is horizontally inserted into the bracket (18) and threadedly connected to the bracket (18); a limit plate is arranged on one side of the screw rod (20) facing the mounting tube (16); and a handle (21) is arranged on the end of the screw rod (20) which is away from the limit plate.

10. A magnetoresistive electromagnetic metal sheet stamping and forming device according to claim 9, characterized in that, The bracket (18) comprises: a vertically arranged support plate, the support plate being provided with a plurality of mounting holes along the vertical direction, nuts (19) being installed in the mounting holes, and the nuts (19) being used for being threadedly connected to the screw rod (20).

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