Electromagnetic Micro Forging Device with Stroke Active Regulation

Abstract

The present invention provides an electromagnetic micro-forging device with active stroke adjustment. It includes an upper limit active adjustment structure and an electromagnetic micro-forging drive structure; the electromagnetic micro-forging drive structure includes a first outer shell, a drive assembly, an intermediate connecting rod, and a micro-forging head; the micro-forging head is installed at the bottom end of the intermediate connecting rod, and the drive assembly is used to drive the intermediate connecting rod to reciprocate up and down; the upper limit active adjustment structure is installed above the electromagnetic micro-forging drive structure and is used to adjust the highest position of the reciprocating motion of the intermediate connecting rod. The upper limit active adjustment structure includes an active adjustment structure drive member, a transmission member, a lead screw, and a movable upper limit block; through the design of the upper limit active adjustment structure of the present invention, the position of the movable upper limit block can be actively adjusted to achieve the adjustability of the upper limit position of the intermediate connecting rod, and further the stroke of the micro-forging can be controlled to achieve the purpose of online regulating the micro-forging effect.

Description

Technical Field

[0001] The present invention relates to the field of processing, and specifically, to an electromagnetic micro-forging device with active stroke adjustment. Background Art

[0002] Micro-forging is a controllable and orderly surface strengthening process. The electromagnetic-driven micro-forging system is a widely used micro-terminal device at present. During the electromagnetic micro-forging strengthening process, the micro-forging stroke, as a key variable for controlling the impact force and impact speed of the forging head, is a key factor determining the micro-forging strengthening effect;

[0003] Specifically, micro-forging is a new mechanical surface modification process, which involves using a high-hardness hammer head with high-frequency oscillation to hammer the target area. The electromagnetic-driven micro-forging is a widely used micro-forging device, and its general structure is as Figure 1 shown. The driving device is composed of magnetic poles, electromagnetic coils, etc. The impact structure, namely the forging head and the impact rod, under the excitation of the electromagnetic drive system, performs reciprocating linear motion between the limit block and the workpiece surface. After the material undergoes continuous impacts of protons, strong plastic deformation occurs, and a certain amount of plastic deformation can improve the surface integrity of the material. The control system can be used to adjust the impact frequency and the magnitude of the impact energy, and the cooling system plays a role in dissipating heat and ensuring the stable operation of the system.

[0004] As Figure 1 shown, the micro-forging device is generally installed at the end of a machine tool or a robotic arm through a mechanical interface, and process parameters such as the stroke, step distance, row distance, and impact angle are adjusted. During the processing, the micro-forging head always maintains a constant distance from the workpiece surface to ensure that the workpiece material is subjected to an impact with precise position and uniform strength. Different metal material workpieces are surface-finished or strengthened through precisely controlled high-frequency impacts.

[0005] For the electromagnetic-driven micro-forging device, the magnitude of the micro-forging head stroke directly determines the micro-forging strengthening effect. At present, the stroke of the micro-forging process is generally set before the processing starts. The machine tool or the robotic arm carries the micro-forging equipment along the preset stroke path for micro-forging processing, and it is impossible to change the preset stroke during the processing. When encountering parts with complex surface undulations, it is difficult to preset the micro-forging path, resulting in poor strengthening effects or even the inability to complete the micro-forging process.

[0006] Most of the electromagnetic-driven micro-forging devices recorded in the currently published literature do not design an active adjustment device for the micro-forging stroke. Therefore, they do not have the function of active stroke adjustment, cannot change the preset stroke during the processing, and are even less able to complete the adaptive processing of the micro-forging process. This greatly limits the application range and strengthening effect of the electromagnetic micro-forging system. Summary of the Invention

[0007] Aiming at the defects in the prior art, the purpose of the present invention is to provide an electromagnetic micro-forging device with active stroke adjustment.

[0008] An electromagnetic micro-forging device with active stroke adjustment provided according to the present invention includes an upper limit active adjustment structure and an electromagnetic micro-forging drive structure;

[0009] The electromagnetic micro-forging drive structure includes a first outer shell, a drive assembly, an intermediate connecting rod, and a micro-forging head; a receiving space is provided inside the first outer shell;

[0010] The drive assembly is installed in the receiving space, one end of the intermediate connecting rod is located in the receiving space, and the other end extends out of the bottom of the first outer shell;

[0011] The micro-forging head is installed at the bottom end of the intermediate connecting rod, and the drive assembly is used to drive the intermediate connecting rod to reciprocate up and down;

[0012] The upper limit active adjustment structure is installed above the electromagnetic micro-forging drive structure and is used to adjust the highest position of the reciprocating motion of the intermediate connecting rod.

[0013] Preferably, the upper limit active adjustment structure includes an active adjustment structure drive member, a transmission member, a lead screw, and a movable upper limit block;

[0014] The active adjustment structure drive member is connected to the lead screw through the transmission member, the lower part of the lead screw is connected to the movable upper limit block through a threaded structure, and the movable upper limit block can move up and down with the rotation of the lead screw;

[0015] When the intermediate connecting rod moves upward until its top abuts against the bottom of the movable upper limit block, the intermediate connecting rod reaches the upper limit position.

[0016] Preferably, the lower part of the lead screw is matched with the internal thread of the movable upper limit block through an external thread.

[0017] Preferably, it further includes a support link outer shell and an intermediate support outer shell. The support link outer shell, the intermediate support outer shell, and the first outer shell are arranged in sequence from top to bottom, and the active adjustment structure drive member is installed in the support link outer shell. The main body part of the movable upper limit block is located in the intermediate support outer shell, and the bottom of the movable upper limit block extends into the receiving space;

[0018] Preferably, the upper limit active adjustment structure further includes a guide shaft and a first linear bearing,

[0019] The top and bottom ends of the guide shaft are fixedly connected to the intermediate support outer shell and the first outer shell respectively;

[0020] The two sides of the movable upper limit block are equipped with first linear bearings, and the movable upper limit block is matched with the guide shaft through the first linear bearings.

[0021] Preferably, the active adjustment structure driving member is a driving motor, and the transmission member is a coupling.

[0022] Preferably, an air cooling channel is provided on the first housing;

[0023] The accommodation space is communicated with the outside through the air cooling channel.

[0024] Preferably, the electromagnetic micro-forging driving structure further includes a second linear bearing; a second linear bearing is installed between the first housing and the intermediate connecting rod.

[0025] Preferably, the driving assembly includes a coil support, a permanent magnet, and a coil;

[0026] The permanent magnet is fixed in the accommodation space, the coil is wound around the coil support, and the coil support is fixedly connected to the intermediate connecting rod; the top end of the intermediate connecting rod is higher than the top end of the coil support;

[0027] Under the drive of electromagnetic force, the coil can drive the coil support to move up and down to realize the up and down movement of the intermediate connecting rod.

[0028] Preferably, a circuit interface is further provided on the first housing;

[0029] The coil is connected to an external power supply or circuit through the circuit interface.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Through the design of the upper limit active adjustment structure, the present invention can actively adjust the position of the movable upper limit block to realize the adjustability of the upper limit position of the intermediate connecting rod, and further control the stroke of the micro-forging to achieve the purpose of online regulation of the micro-forging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0033] Figure 1 is a schematic structural diagram of an electromagnetic drive type micro-forging device in the prior art;

[0034] Figure 2 is a schematic structural diagram of the present invention;

[0035] As shown in the figure:

[0036]

[0037] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0039] The present invention provides an electromagnetic micro-forging device with active stroke adjustment, such as Figure 2 shown, which includes an upper limit active adjustment structure 100 and an electromagnetic micro-forging drive structure 200; the electromagnetic micro-forging drive structure 200 includes a first housing 6, a drive assembly 300, an intermediate connecting rod 16, and a micro-forging head 17; a receiving space 61 is provided inside the first housing 6, the drive assembly 300 is installed in the receiving space 61, one end of the intermediate connecting rod 16 is located in the receiving space 61, and the other end extends out of the bottom of the first housing 6; the micro-forging head 17 is installed at the bottom end of the intermediate connecting rod 16, and the drive assembly 300 is used to drive the intermediate connecting rod 16 to reciprocate up and down; the upper limit active adjustment structure 100 is installed above the electromagnetic micro-forging drive structure 200 and is used to adjust the highest position of the reciprocating motion of the intermediate connecting rod 16.

[0040] The upper limit active adjustment structure 100 includes an active adjustment structure drive member 2, a transmission member 3, a lead screw 9, and a movable upper limit block 11; the active adjustment structure drive member 2 is connected to the lead screw 9 through the transmission member 3, and the transmission member 3 transmits the rotational motion of the active adjustment structure drive member 2 to the lead screw 9, driving the lead screw 9 to rotate. The lower part of the lead screw 9 is connected to the movable upper limit block 11 through a threaded structure. Specifically, the lower part of the lead screw 9 is in threaded engagement with the internal thread of the movable upper limit block 11. Due to the threaded engagement, the rotational motion of the lead screw 9 can be converted into the axial linear motion of the movable upper limit block 11, that is, the movable upper limit block 11 can move up and down with the rotational motion of the lead screw 9 to adjust the specific position of the movable upper limit block 11; when the intermediate connecting rod 16 moves upward until its top abuts against the bottom of the movable upper limit block 11, the intermediate connecting rod 16 reaches the upper limit position.

[0041] The electromagnetic micro-forging device with active stroke adjustment further includes a support link housing 1 and an intermediate support housing 4. The support link housing 1, the intermediate support housing 4, and the first housing 6 are arranged in sequence from top to bottom, and the active adjustment structure drive member 2 is installed in the support link housing 1. The main body part of the movable upper limit block 11 is located in the intermediate support housing 4, and the bottom of the movable upper limit block 11 extends into the receiving space 61;

[0042] The upper limit active adjustment structure 100 further includes a guide shaft 8 and a first linear bearing 10. The top and bottom of the guide shaft 8 are fixedly connected to the intermediate support housing 4 and the first housing 6 respectively. The two sides of the movable upper limit block 11 are equipped with the first linear bearing 10, and the movable upper limit block 11 is matched with the guide shaft 8 through the first linear bearing 10. The guide shaft 8 and the linear bearing on the upper limit block form a linear motion pair, which restricts the rotation of the upper limit block and ensures the axial linear motion of the movable upper limit block.

[0043] The electromagnetic micro-forging drive structure 200 further includes a second linear bearing 7; the second linear bearing 7 is installed between the first housing 6 and the intermediate connecting rod 16.

[0044] The drive assembly 300 includes a coil support 12, a permanent magnet 13, and a coil 14; the permanent magnet 13 is fixed in the accommodation space 61 to form a fixed magnetic field in the electromagnetic micro-forging system. The coil 14 is wound around the coil support 12, and the coil support 12 is fixedly connected to the intermediate connecting rod 16; the top height of the intermediate connecting rod 16 is higher than the top height of the coil support 12; under the drive of electromagnetic force, the coil 14 can drive the coil support 12 to move up and down to realize the up and down movement of the intermediate connecting rod 16. Specifically, the coil 14, the coil support 12, the intermediate connecting rod 16, and the micro-forging head 17 together constitute the mover of the micro-forging actuator. When an electric current is passed through the coil, due to the principle of electromagnetic interaction, an electromagnetic field will be generated. Under the fixed magnetic field generated by the permanent magnet 13, a corresponding electromagnetic force will be generated to drive the mover to move. When an alternating current of a certain frequency is passed through the coil, a corresponding alternating electromagnetic force will be generated to drive the forging head system to generate a periodic motion. When the mover impacts the workpiece downward and impacts the upper limit block upward, corresponding reaction forces are received. A dynamic balance is formed between the alternating electromagnetic force and the reaction force, and the micro-forging head realizes a reciprocating mechanical impact motion, continuously impacting the surface of the part to achieve the mechanical strengthening effect.

[0045] An air-cooling channel 5 is opened on the first housing 6; the air-cooling channel 5 and the accommodation space 61 are connected to the outside through the air-cooling channel 5. When the coil 14 generates heat, cold air can be introduced into the coil 14 through the air-cooling channel 5 to realize the cooling of the coil 14. A circuit interface 15 is also opened on the first housing 6; the coil 14 is connected to an external power supply or circuit through the circuit interface 15.

[0046] In a preferred example, the active adjustment structure driver 2 is a driving motor. The transmission member 3 is a coupling. After the driving motor receives an input signal, it drives the lead screw 9 to rotate clockwise or counterclockwise through the transmission member 3. Through the threaded fit between the lead screw 9 and the upper limit block, the movable upper limit block 11 can be driven to perform free and precisely controllable axial linear motion up and down. In another preferred example, in addition to the motor driving the lead screw to drive the upper limit block to move, other linear motion mechanisms such as a gear rack and a crank slider can also be used to control the movement of the upper limit block.

[0047] The present invention can achieve the purpose of adjusting the stroke of micro forging by actively adjusting the position of the movable upper limit block 11, thereby realizing the online control of the micro forging effect. The present invention designs an electromagnetic micro forging device with an actively adjustable stroke. The upper limit of the intermediate connecting rod 16 can be actively adjusted, and thus the micro forging stroke can be actively controlled. This mechanism can actively control the micro forging stroke by relying on the upper limit adjustment system of the micro forging equipment itself during the process of the electromagnetic micro forging impacting along a preset path. Relying on this equipment, the micro forging strengthening of a complex undulating surface can be effectively completed. In addition, this equipment can also be combined with the micro forging process sensing system to determine the moving stroke of the upper limit block according to the stroke and impact force information obtained by the sensing system, adjust the micro forging stroke online, adjust the micro forging effect, form a closed-loop feedback, and realize the adaptive processing of the micro forging process. The entire electromagnetic micro forging device with an actively adjustable stroke has a compact structure and is convenient to be integrated with a machine tool or a robotic arm, etc.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0049] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. An electromagnetic micro-forging device with active stroke adjustment, characterized in that: It comprises an upper limit active adjustment structure (100) and an electromagnetic micro-forging drive structure (200); The electromagnetic micro-forging driving structure (200) comprises a first housing (6), a driving assembly (300), an intermediate connecting rod (16) and a micro-forging head (17); a receiving space (61) is provided inside the first housing (6); The driving assembly (300) is installed in the accommodating space (61), one end of the intermediate connecting rod (16) is located in the accommodating space (61), and the other end extends out of the bottom of the first housing (6); The micro-forging head (17) is mounted on the bottom end of the intermediate connecting rod (16), and the driving assembly (300) is used to drive the intermediate connecting rod (16) to reciprocate up and down; The upper limit active adjustment structure (100) is installed above the electromagnetic micro-forging drive structure (200) and is used to adjust the highest position of the reciprocating motion of the intermediate connecting rod (16); The upper limit active adjustment structure (100) comprises an active adjustment structure driving member (2), a transmission member (3), a screw rod (9) and a movable upper limit block (11); The active adjustment structure driving member (2) is connected to the screw rod (9) via a transmission member (3); the lower portion of the screw rod (9) is connected to the movable upper limit block (11) via a threaded structure; and the movable upper limit block (11) can move up and down along with the rotation of the screw rod (9); When the intermediate connecting rod (16) moves upward until its top abuts against the bottom of the movable upper limit block (11), the intermediate connecting rod (16) reaches the upper limit position; It also comprises a supporting link housing (1) and an intermediate supporting housing (4), wherein the supporting link housing (1), the intermediate supporting housing (4) and the first housing (6) are arranged in sequence from top to bottom, and the active adjustment structure driving member (2) is installed in the supporting link housing (1), the main body of the movable upper limit block (11) is located in the intermediate supporting housing (4), and the bottom of the movable upper limit block (11) extends into the accommodation space (61); The active adjustment structure driving component (2) is a driving motor, and the transmission component (3) is a coupling.

2. The electromagnetic micro-forging device with active stroke adjustment according to claim 1, characterized in that: The lower part of the screw rod (9) is matched with the internal thread of the movable upper limit block (11) through the external thread.

3. The electromagnetic micro-forging device with active stroke adjustment according to claim 1, characterized in that: The upper limit active adjustment structure (100) further comprises a guide shaft (8) and a first linear bearing (10). The top end and the bottom end of the guide shaft (8) are respectively fixedly connected to the intermediate support shell (4) and the first shell (6); First linear bearings (10) are installed on both sides of the movable upper limit block (11), and the movable upper limit block (11) cooperates with the guide shaft (8) through the first linear bearings (10).

4. The electromagnetic micro-forging device with active stroke adjustment according to claim 1, characterized in that: An air cooling channel (5) is provided on the first shell (6); The accommodating space (61) is connected to the outside through the air cooling channel (5).

5. The electromagnetic micro-forging device with active stroke adjustment according to claim 3, characterized in that: The electromagnetic micro-forging drive structure (200) further comprises a second linear bearing (7); the second linear bearing (7) is installed between the first housing (6) and the intermediate connecting rod (16).

6. The electromagnetic micro-forging device with active stroke adjustment according to claim 5, characterized in that: The driving component (300) comprises a coil support (12), a permanent magnet (13) and a coil (14); The permanent magnet (13) is fixed in the accommodating space (61), the coil (14) is wound on the coil support (12), and the coil support (12) is fixedly connected to the intermediate connecting rod (16); the top height of the intermediate connecting rod (16) is higher than the top height of the coil support (12); Driven by electromagnetic force, the coil (14) can drive the coil support (12) to move up and down, so as to achieve the upward and downward movement of the intermediate connecting rod (16).

7. The electromagnetic micro-forging device with active stroke adjustment according to claim 6, characterized in that: The first housing (6) is also provided with a circuit interface (15); The coil (14) is connected to an external power source or line via a circuit interface (15).

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