CN110332277B - Curved surface thin-wall part vibration control device based on permanent magnet drive - Google Patents
Curved surface thin-wall part vibration control device based on permanent magnet drive Download PDFInfo
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- CN110332277B CN110332277B CN201910590127.6A CN201910590127A CN110332277B CN 110332277 B CN110332277 B CN 110332277B CN 201910590127 A CN201910590127 A CN 201910590127A CN 110332277 B CN110332277 B CN 110332277B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
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Abstract
The invention provides a curved surface thin-wall part vibration control device based on permanent magnet driving, which comprises an electromagnetic permanent magnet driving mechanism, a driven mechanism, a motion transformation mechanism and a self-adaptive jacking mechanism, wherein the electromagnetic permanent magnet driving mechanism is arranged on the driven mechanism; the electromagnetic permanent magnet driving mechanism is arranged on the base and is connected with the driven mechanism and provides a power source for the driven mechanism; the driven mechanism is connected with the motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion; the motion conversion mechanism is also arranged on the base and is connected with the self-adaptive jacking mechanism, and the self-adaptive jacking mechanism is driven by the motion conversion mechanism to move up and down. According to the vibration control device for the curved surface thin-wall part, one driving source can realize motion output at multiple positions, so that the driving source is saved, and the whole structure of the system is more compact. In addition, the power source is generated by utilizing an electromagnetic permanent magnet mode, and compared with a linear motor and a voice coil motor with the same size, the output rigidity of the electromagnetic permanent magnet driving mechanism is higher.
Description
Technical Field
The invention relates to a curved surface thin-wall part vibration control device based on permanent magnet driving.
Background
In the process of machining large thin-wall curved parts (such as skins of airplanes and rockets), because the size of a workpiece is large and the rigidity in the thickness direction is small, the vibration generated by a cutter is easy to excite the vibration of the thin-wall workpiece. In order to suppress the vibration, the invention provides an active vibration damping device based on permanent magnet drive.
The invention patent with publication number CN109590776A discloses a flexible clamp based on magnetorheological fluid, which comprises a mounting seat, a telescopic body fixedly connected with the mounting seat and a clamping body arranged on one side of a telescopic ladder far away from the mounting seat; the clamping body comprises a base, two movable clamping heads, a magnetorheological fluid bag and an adjustable clamping screw; the adjustable clamping screw is connected with one side of the two movable chucks close to the base. The torque transmission accuracy of the jig is insufficient.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a curved surface thin-wall part vibration control device based on permanent magnet driving.
The invention provides a curved surface thin-wall part vibration control device based on permanent magnet driving, which comprises an electromagnetic permanent magnet driving mechanism, a driven mechanism, a motion transformation mechanism and a self-adaptive jacking mechanism;
the electromagnetic permanent magnet driving mechanism is arranged on the base and is connected with the driven mechanism and provides a power source for the driven mechanism;
the driven mechanism is connected with a motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion;
the motion conversion mechanism is also installed on the base and connected with the self-adaptive jacking mechanism, and the self-adaptive jacking mechanism is driven by the motion conversion mechanism to move up and down.
Furthermore, the electromagnetic permanent magnet driving mechanism enables the driven mechanism to do reciprocating movement, and comprises a circular iron core with a pair of internal teeth, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;
and electromagnetic coils are arranged on the pair of inner teeth of the annular iron core, a permanent magnet is arranged in the accommodating space between the two inner teeth, one end of the rotating shaft of the permanent magnet is fixed with the permanent magnet, and the other end of the rotating shaft of the permanent magnet is connected with the driven mechanism.
Furthermore, the electromagnetic permanent magnet driving mechanism enables the driven mechanism to reciprocate, and comprises a soft magnetic iron core, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;
the soft magnetic iron core is formed by oppositely arranging two E-shaped iron cores with two long ends and a short middle part to form an accommodating space, the permanent magnet is placed in the accommodating space, the electromagnetic coils are wound on the two ends of the E-shaped iron core, and the rotating shaft of the permanent magnet penetrates through the through hole in the middle of the permanent magnet and then is vertically placed in the accommodating space.
Further, the reciprocating motion of the driven mechanism is converted into displacement output in the vertical direction through a motion conversion mechanism, and the driven mechanism is a cam direct-acting driven mechanism and comprises a cam rotating shaft, a cam, a first push rod and a second push rod;
the cam is connected with the cam rotating shaft, the first push rod and the second push rod are symmetrically distributed along the radial direction of the cam and are in contact with the cam, the cam rotating shaft is connected with a permanent magnet rotating shaft of the electromagnetic permanent magnet driving mechanism into a whole, the cam rotates and swings together under the driving of the cam rotating shaft, and the first push rod and the second push rod are pushed to do reciprocating motion when the cam rotates and swings.
Furthermore, the shape of the cam is oval, the geometric center of the cam is overlapped with the rotating shaft of the cam, and the cam is simultaneously contacted with the first push rod and the second push rod, so that the first push rod and the second push rod are ensured to do bidirectional linear motion.
Further, the cam linear motion driven mechanism further comprises a first roller and a second roller;
the first roller is arranged between the first push rod and the cam and is connected with the first push rod; the second roller is disposed between and connected to the second push rod and the cam.
Furthermore, the motion conversion mechanism is driven by a flexible hinge and comprises a motion input component, a motion conversion intermediate component and a motion output component, wherein the motion conversion intermediate component is arranged on the base, and the motion output component is also arranged on the base;
the motion input component comprises two radial motion components, and the two radial motion components are respectively connected with a first push rod and a second push rod of the cam linear motion driven mechanism, so that the bidirectional linear motion of the first push rod and the second push rod is converted into the radial linear motion of the two push rods;
the motion input component and the motion output component are respectively connected with the motion conversion middle component, and the motion conversion middle component converts the radial linear motion of the motion input component into the vertical linear motion of the motion output component.
Furthermore, the self-adaptive jacking mechanism adopts a floating spherical hinge jacking head to contact with the workpiece, and self-adaptively adjusts the contact position according to the change of the curvature of the curved surface of the processed workpiece, so that the supporting force of the self-adaptive jacking mechanism on the workpiece is consistent while the self-adaptive jacking mechanism is in real-time contact with the workpiece.
Furthermore, the motion transformation mechanism comprises an elastic tensioning frame, an inclined boss, a ball and an ┐ deformation direction output assembly, wherein one end of the ┐ deformation direction output assembly is fixed with the base, the other end of the ┐ deformation direction output assembly is provided with the ball, the elastic tensioning frame is provided with the inclined boss, and the inclined boss is in contact with the ball;
the follower mechanism comprises an elliptical cam;
the periphery of the cam is provided with an elastic tensioning frame, the elastic tensioning frame generates deformation in the radial direction under the action of the external thrust of the elliptical cam, and the ball bearing moves up and down on the inclined boss, so that the displacement output of the '┐' deformation to the vertical direction of the output assembly is realized.
Furthermore, the motion transformation mechanism comprises a ball and an '┐' deformation direction output assembly, one end of the '┐' deformation direction output assembly is fixed with the base, and the other end of the '┐' deformation direction output assembly is provided with the ball;
the driven mechanism comprises a rotatable circular table surface and a boss arranged on the circular table surface;
the ball of motion conversion mechanism is above the boss of table face, the ball contacts with the boss, table face produces rotary motion under the drive of permanent magnet pivot for boss and "┐" on the table face deformation make its displacement output that produces the vertical direction to the ball contact on the output module, jack-up "┐" deformation.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the vibration control device for the curved surface thin-wall part, one driving source can realize motion output at multiple positions, so that the driving source is saved, and the whole structure of the system is more compact.
2. The vibration control device for the curved surface thin-wall part generates a power source in an electromagnetic permanent magnet mode, and the permanent magnet generates electromagnetic torque under the action of an alternating magnetic field around an electromagnetic coil; compared with a linear motor, the electromagnetic permanent magnet driving mechanism has no air gap between the stator and the rotor; compared with a voice coil motor with the same size, the electromagnetic permanent magnet driving mechanism has higher output rigidity.
3. According to the vibration control device for the curved surface thin-wall part, two E-shaped iron cores are oppositely arranged, the permanent magnet is placed in the center of the iron core, the magnetic flux generated by the electromagnet is increased, and meanwhile, the magnetic loss and the magnetic leakage in a magnetic circuit are reduced.
4. According to the vibration control device for the curved surface thin-wall part, the permanent magnet only swings back and forth within a certain angle range, and high-efficiency force transmission and high linearity can be guaranteed.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of example 1 of the present invention;
fig. 2 is a schematic structural view of an electromagnetic permanent magnet drive mechanism according to embodiment 1 of the present invention;
fig. 3 is a top view of an electromagnetic permanent magnet drive mechanism according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a cam linear motion follower mechanism according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a motion conversion mechanism according to embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a motion converting intermediate part and a motion input part in embodiment 1 of the present invention;
FIG. 7 is a schematic structural view of example 2 of the present invention;
fig. 8 is a schematic structural view of the electromagnetic permanent magnet drive mechanism of embodiments 2 and 3 of the present invention;
fig. 9 is a top view of the electromagnetic permanent magnet drive mechanism of embodiments 2 and 3 of the present invention;
fig. 10 is a schematic structural view of a motion conversion mechanism according to embodiment 2 of the present invention;
FIG. 11 is a schematic structural view of example 3 of the present invention;
fig. 12 is a schematic structural view of a motion conversion mechanism according to embodiment 3 of the present invention;
fig. 13 is a schematic structural view of a driven mechanism according to embodiment 3 of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a curved surface thin-wall part vibration control device based on permanent magnet driving, which comprises an electromagnetic permanent magnet driving mechanism, a driven mechanism, a motion transformation mechanism and a self-adaptive jacking mechanism, wherein the electromagnetic permanent magnet driving mechanism is arranged on the driven mechanism;
the electromagnetic permanent magnet driving mechanism is arranged on the base through a first fixed auxiliary assembly and is connected with the driven mechanism and provides a power source for the driven mechanism;
the driven mechanism is connected with the motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion;
the motion conversion mechanism is installed on the base through the second fixing auxiliary assembly, the motion conversion mechanism is connected with the self-adaptive jacking mechanism, and the self-adaptive jacking mechanism is driven by the motion conversion mechanism to move up and down.
Example 1
As shown in fig. 1 to 6, a curved surface thin-wall part vibration control device based on permanent magnet driving comprises an electromagnetic permanent magnet driving mechanism 1, a driven mechanism 2, a motion transformation mechanism 3 and an adaptive jacking mechanism 4; the electromagnetic permanent magnet driving mechanism 1 is installed on the base 5 through a first fixing auxiliary assembly (specifically a fixing block 6), the motion conversion mechanism 3 is installed on the base 5 through a second fixing auxiliary assembly (comprising a first fixing column 7 and a second fixing column 8), and the electromagnetic permanent magnet driving mechanism 1 is connected with the driven mechanism 2 and provides a power source for the driven mechanism 2; the driven mechanism 2 is connected with a motion conversion mechanism 3, and the motion conversion mechanism 3 converts the reciprocating motion of the driven mechanism 2 into vertical motion; the motion transformation mechanism 3 is connected with the self-adaptive shoring mechanism 4, and the self-adaptive shoring mechanism 4 is driven by the motion transformation mechanism 3 to move up and down.
The electromagnetic permanent magnet driving mechanism 1 comprises a soft magnetic iron core 101, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104; in order to increase the magnetic flux generated by the electromagnet and reduce the magnetic loss and magnetic leakage in the magnetic circuit, the soft magnetic core 101 is preferably arranged oppositely by two E-shaped cores with two long ends and a short middle to form an accommodating space, the permanent magnet 103 is placed in the accommodating space, two turns of electromagnetic coils are wound on two ends of the E-shaped core to improve the utilization rate of the magnetic flux and the magnetic energy and avoid interference with the permanent magnet 103 when rotating, the permanent magnet rotating shaft 104 penetrates through a through hole in the middle of the permanent magnet 103 and then is vertically placed in the accommodating space, and the intensity of the electromagnetic field generated by the soft magnetic core 101 can be adjusted by the number of turns of the electromagnetic coil 102 and the intensity of the electrified current; the angle of the permanent magnet 103 and the permanent magnet rotating shaft 104 rotating and swinging in the electromagnetic field is adjusted by adjusting the current input to the electromagnetic coil 102.
The electromagnetic permanent magnet type driving torque is generated by interaction of an electromagnetic field and a permanent magnetic field, the soft magnetic iron core is used as a stator, the permanent magnet 103 is used as a rotor, and the reciprocating swing of the electromagnetic permanent magnet driving mechanism is realized according to the change of the suction force and the repulsion force between the stator and the rotor. Under the action of the torque, the permanent magnet 103 drives the permanent magnet rotating shaft 104 connected with the permanent magnet 103 to synchronously rotate by the same angle, and under the action of certain sine and cosine currents, the permanent magnet 103 can do reciprocating swing in the electromagnetic field.
The driven mechanism 2 is a cam direct-acting driven mechanism and comprises a cam rotating shaft 21, a cam 22, a first push rod 23 and a second push rod 24; the cam rotating shaft 21 is connected with the cam 22, the first push rod 23 and the second push rod 24 are symmetrically distributed along the radial direction of the cam 22 and are in contact with the cam 22, the cam rotating shaft 21 is connected with the permanent magnet rotating shaft 104 of the electromagnetic permanent magnet driving mechanism into a whole, the cam 22 rotates and swings together under the driving of the cam rotating shaft 21, and the cam 22 pushes the first push rod 23 and the second push rod 24 to do reciprocating motion when rotating and swinging.
The contour line of the cam 22 is oval, the geometric center of the cam 22 is coincident with the cam rotating shaft 21, and the cam 22 is simultaneously contacted with the first push rod 23 and the second push rod 24, so that the first push rod 23 and the second push rod 24 are ensured to do bidirectional linear motion.
The cam linear motion follower mechanism further comprises a first roller 25 and a second roller 26; the first roller 25 is disposed between the first push rod 23 and the cam 22 and connected to the first push rod 23; a second roller 26 is disposed between the second push rod 24 and the cam 22 and is connected to the second push rod 24. The first and second rollers 25, 26 can reduce friction and wear in the drive of the cam 22. By being radially and axially fixed, the movement of the cam 22 and the cam shaft 21 are kept synchronized. The first push rod 23 and the second push rod 24 are connected with the motion conversion mechanism 3 through adjusting bolts to form a whole. In fig. 4(a), A, B, C show three different positions of the movement of the push rod, respectively. When the cam linear motion follower passes through the position a-B-a-C-a, the displacements of the first push rod 23 and the second push rod 24 are shifted as shown in fig. 4(B) and 4(C), respectively.
The motion conversion mechanism 3 adopts flexible hinge transmission, the motion conversion mechanism 3 comprises a motion input component 31, a motion conversion intermediate component 32 and a motion output component 33, the motion conversion intermediate component 32 is installed on the base 5 through a first fixed column 7, and the motion output component 33 is installed on the base 5 through a second fixed column 8;
the motion input component 31 comprises two radial motion components, and the two radial motion components are respectively connected with the first push rod 23 and the second push rod 24 of the cam linear motion driven mechanism, so that the bidirectional linear motion (the X direction in the figures 5 and 6) of the first push rod 23 and the second push rod 24 is converted into the radial linear motion (the Y direction in the figures 5 and 6) of the first push rod 23 and the second push rod 24;
the motion input member 31 and the motion output member 33 are connected to a motion conversion intermediate member 32, respectively, and the motion conversion intermediate member 32 can convert the radial linear motion of the motion input member 31 into the vertical linear motion (Z direction in fig. 5 and 6) of the motion output member 33.
The motion conversion mechanism 3 comprises motion reversing in a horizontal plane and a vertical plane, wherein through a horizontal reversing structure, a horizontal reversing part in the motion conversion mechanism 3 is formed by cutting a whole circular aluminum alloy plate by using spark lines, and the bidirectional linear motion of a push rod is changed into the radial linear motion of four radial motion components in the circumferential direction of the platform; through the vertical reversing structure, the horizontal radial linear motion of four radial motion components in the circumferential direction is changed into four linear motion of the motion output component 33 (or four linear motion of four self-adaptive jacking mechanisms 4 connected with the motion output component 33 in the vertical direction, the motion conversion mechanism 3 can realize the motion conversion in different modes, the embodiment adopts a flexible hinge type motion conversion structure, which is beneficial to improving the overall transmission precision of the system, the reason is that the horizontal reversing part in the motion conversion mechanism 3 is formed by cutting a whole circular aluminum alloy plate by spark lines, which is beneficial to improving the motion reversing precision, the motion input component 31 is connected with the first push rod 23 and the second push rod 24 of the cam direct-acting driven mechanism through pre-tightening bolts, so that the force transmission can be carried out, and meanwhile, the flexible motion conversion mechanism 3 can be used for applying pre-pressure to the two push rods, real-time contact of the cam 22 and the two pushrods is ensured. The motion converting intermediate member 32 and the motion outputting member 33 are fixed by bonding.
The self-adaptive jacking mechanism 4 adopts a floating spherical hinge jacking head at the position contacted with the workpiece, so that the contact position can be self-adaptively adjusted according to the change of the curvature of the curved surface of the processed workpiece, and the consistency of the supporting force on the workpiece while the workpiece is contacted with the workpiece in real time is ensured. The four self-adaptive jacking mechanisms 4 are fixed at four output ends of the motion conversion mechanism 3, and ball hinges capable of floating are arranged in jacking heads, so that the vibration control device can be ensured to be in real-time contact with the thin-wall curved surface workpiece 9.
In embodiment 1 of the present invention, the electromagnetic permanent magnet driving mechanism 1 generates a stable oscillation source; the cam direct-acting driven mechanism is connected with the electromagnetic permanent magnet driving mechanism 1 through a cam rotating shaft 21, and the back-and-forth swing of the permanent magnet 103 is changed into the reciprocating movement of the cam direct-acting driven mechanism; the electromagnetic permanent magnet driving mechanism 1 and the cam direct-acting driven mechanism are horizontally arranged; the reciprocating movement in the horizontal plane is converted into the vertical up-down movement through the motion conversion mechanism 3, and the up-down movement is used as the final output motion of the whole device and can counteract the modal vibration of the curved surface thin-wall part 9; the self-adaptive top supporting mechanism 4 can self-adaptively support the curved thin-wall part 9; the fixing auxiliary assembly is used for limiting, connecting and fixing the functional components. The invention utilizes the electromagnetic permanent magnet mode to generate a power source, the permanent magnet 103 generates electromagnetic torque under the action of an alternating magnetic field around the electromagnetic coil 102, compared with a linear motor, the electromagnetic actuator has no air gap between a stator and a rotor; compared with a voice coil motor with the same size, the output rigidity of the voice coil motor is higher. Under the action of electromagnetic torque, the cam 22 coaxial with the permanent magnet 103 also rotates, and the cam linear driven mechanism moves back and forth near the initial position by utilizing a specially designed cam profile. The cam 22 of the present invention is not a cam in the conventional sense, but it is reciprocated only within a certain angular range, ensuring higher efficiency of force transmission and better linearity.
Example 2
As shown in fig. 7 to 10, the present embodiment is consistent with embodiment 1 in terms of the driving principle, the design of the electromagnetic coil, and the like, and mainly changes the design of the motion conversion mechanism 3 by using a polygonal tension structure 301 based on an elastic material.
A curved surface thin-wall part vibration control device based on permanent magnet driving comprises an electromagnetic permanent magnet driving mechanism 1, a driven mechanism 2, a motion transformation mechanism 3 and a self-adaptive jacking mechanism 4; the electromagnetic permanent magnet driving mechanism 1 and the motion conversion mechanism 3 are arranged on the base 5, and the electromagnetic permanent magnet driving mechanism 1 is connected with the driven mechanism 2 and provides a power source for the driven mechanism 2; the driven mechanism 2 contacts the motion conversion mechanism 3, and the motion conversion mechanism 3 converts the reciprocating motion of the driven mechanism 2 into vertical motion; the motion transformation mechanism 3 is connected with the self-adaptive shoring mechanism 4, and the self-adaptive shoring mechanism 4 is driven by the motion transformation mechanism 3 to move up and down.
The follower mechanism 2 includes an elliptical cam 201; the electromagnetic permanent magnet driving mechanism 1 comprises a circular ring-shaped iron core 101 with a pair of internal teeth, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104, wherein the electromagnetic coil 102 is arranged on the pair of internal teeth of the circular ring-shaped iron core 101, the permanent magnet 103 is arranged in a containing space between the two internal teeth, one end of the permanent magnet rotating shaft 104 is fixed with the permanent magnet 103, the other end of the permanent magnet rotating shaft is connected with the geometric center of an elliptical cam 201, and the cam 201 is driven by the permanent magnet; under the electromagnetic field shown in fig. 10, the permanent magnet 103 generates a counterclockwise torque, so that the direction of the internal magnetic field is the same as that of the peripheral electromagnetic field, and under the torque, the permanent magnet 103 drives the permanent magnet rotating shaft 104 connected with the permanent magnet 103 to rotate counterclockwise and synchronously at the same angle, and under the action of a certain sine and cosine current, the permanent magnet 103 swings back and forth in the electromagnetic field.
The motion transformation mechanism 3 comprises an elastic tensioning frame 301, an inclined boss 302, a ball 303 and an '┐' deformation direction output assembly 304, wherein one end of the '┐' deformation direction output assembly 304 is fixed with the base 5, the other end of the '┐' deformation direction output assembly is provided with the ball 303, the elastic tensioning frame 301 is provided with the inclined boss 302, and the inclined boss 302 is in contact with the ball 303;
an elastic tensioning frame 301 is arranged on the periphery of the oval cam 201, and the elastic tensioning frame 301 is subjected to the external thrust of the oval cam 201 to generate deformation in the radial direction on the edge of the elastic tensioning frame, so that the ball 303 moves up and down on the inclined boss 302, and displacement output of the '┐' deformation to the vertical direction of the output assembly 304 is realized.
In this embodiment, the motion conversion mechanism 3 is a polygonal elastic tension frame 301 made of an elastic material. In the alternating magnetic field, the electromagnetic coil 102 drives the permanent magnet 103 and simultaneously drives the cam 201 to swing, so that the polygonal elastic tensioning frame 301 is deformed. The inclined boss 302 arranged on the polygonal elastic tensioning frame 301 and the ball 303 on the direction-changing output assembly 304 form a sliding block pair, so that the direction-changing output assembly 304 can move in the vertical direction to control the vibration of the curved surface thin-wall workpiece 9. Compared with the embodiment 1, in the embodiment, the motion conversion mechanism reduces the number of flexible hinges in the motion conversion assembly, reduces the structural complexity of the system, and improves the overall rigidity and response speed of the device.
Example 3
As shown in fig. 9 to 13, this embodiment is consistent with embodiment 2 in terms of the driving principle, the design of the electromagnetic coil, and the like, and mainly changes the design of the motion conversion mechanism 3 by using a disk structure with a boss.
A curved surface thin-wall part vibration control device based on permanent magnet driving comprises an electromagnetic permanent magnet driving mechanism 1, a driven mechanism 2, a motion transformation mechanism 3 and a self-adaptive jacking mechanism 4; the electromagnetic permanent magnet driving mechanism 1 and the motion conversion mechanism 3 are arranged on the base 5, and the electromagnetic permanent magnet driving mechanism 1 is connected with the driven mechanism 2 and provides a power source for the driven mechanism 2; the driven mechanism 2 is connected with a motion conversion mechanism 3, and the motion conversion mechanism 3 converts the reciprocating motion of the driven mechanism 2 into vertical motion; the motion transformation mechanism 3 is connected with the self-adaptive shoring mechanism 4, and the self-adaptive shoring mechanism 4 is driven by the motion transformation mechanism 3 to move up and down.
The electromagnetic permanent magnet driving mechanism 1 comprises a soft magnetic iron core 101, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104; the inner surface of the soft magnetic iron core 101 is provided with two inner teeth which are oppositely arranged, the two inner teeth are respectively wound with an electromagnetic coil 102, one end of a permanent magnet rotating shaft 104 is fixed with a permanent magnet 103, and the other end is connected with the geometric center of a circular table surface 211; the polarities of the two internal teeth of the inner surface of the soft magnetic core 101 are made opposite by adjusting the direction of the current applied in the electromagnetic coil 102. Under the electromagnetic field shown in fig. 10, the permanent magnet 103 generates a counterclockwise torque, so that the direction of the internal magnetic field is the same as that of the peripheral electromagnetic field, and under the torque, the permanent magnet 103 drives the permanent magnet rotating shaft 104 connected with the permanent magnet 103 to rotate counterclockwise and synchronously at the same angle, and under the action of a certain sine and cosine current, the permanent magnet 103 swings back and forth in the electromagnetic field.
The driven mechanism 2 comprises a rotatable circular table surface 211 and a boss 212 arranged on the circular table surface 211;
the motion conversion mechanism 3 comprises a ball 303 and an '┐' deformation direction output assembly 304, one end of the '┐' deformation direction output assembly 304 is fixed with the base 5, and the other end is provided with the ball 303;
the ball 303 of the motion conversion mechanism is arranged above the boss 212 of the circular table 211, the ball 303 is in contact with the boss 212, the circular table 211 is driven by the permanent magnet rotating shaft 104 to rotate, so that the boss 212 on the circular table 211 is in contact with the ball 303 on the output assembly 304 in a deformation mode of ┐, and the output assembly 304 is jacked to output the displacement in the vertical direction in a deformation mode of ┐.
In the embodiment, the motion transformation mechanism 3 adopts a disc structure with a boss device, the swinging permanent magnet 103 directly drives the circular table surface 211, and when the boss 212 on the circular table surface 211 is in contact with the ball 303 on the output assembly 304 in a deformation direction of ┐, the swing permanent magnet can push the ┐ to generate displacement to the output assembly 304 in the vertical direction, so that the vibration of the thin-wall curved workpiece is controlled.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. A curved surface thin-wall part vibration control device based on permanent magnet driving is characterized by comprising an electromagnetic permanent magnet driving mechanism, a driven mechanism, a motion transformation mechanism and a self-adaptive jacking mechanism;
the electromagnetic permanent magnet driving mechanism is arranged on the base and is connected with the driven mechanism and provides a power source for the driven mechanism;
the driven mechanism is connected with a motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion;
the motion conversion mechanism is also installed on the base, the motion conversion mechanism is connected with the self-adaptive jacking mechanism, the self-adaptive jacking mechanism is driven by the motion conversion mechanism to move up and down, the self-adaptive jacking mechanism adopts a floating spherical hinge jacking head to be in contact with a workpiece, the contact position is adjusted in a self-adaptive manner according to the change of the curvature of the curved surface of the processed workpiece, and the supporting force of the workpiece is consistent while the workpiece is in real-time contact with the workpiece.
2. The curved thin-walled workpiece vibration control device based on permanent magnet driving according to claim 1, wherein the electromagnetic permanent magnet driving mechanism enables the driven mechanism to reciprocate, and the electromagnetic permanent magnet driving mechanism comprises a circular iron core with a pair of internal teeth, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;
and electromagnetic coils are arranged on the pair of inner teeth of the annular iron core, a permanent magnet is arranged in the accommodating space between the two inner teeth, one end of the rotating shaft of the permanent magnet is fixed with the permanent magnet, and the other end of the rotating shaft of the permanent magnet is connected with the driven mechanism.
3. The curved thin-walled workpiece vibration control device based on permanent magnet driving of claim 2, wherein the electromagnetic permanent magnet driving mechanism enables the driven mechanism to reciprocate, and the electromagnetic permanent magnet driving mechanism comprises a soft magnetic iron core, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;
the soft magnetic iron core is formed by oppositely arranging two E-shaped iron cores with two long ends and a short middle part to form an accommodating space, the permanent magnet is placed in the accommodating space, the electromagnetic coils are wound on the two ends of the E-shaped iron core, and the rotating shaft of the permanent magnet penetrates through the through hole in the middle of the permanent magnet and then is vertically placed in the accommodating space.
4. The vibration control device for the curved thin-walled workpiece based on permanent magnet driving according to claim 3, wherein the reciprocating motion of the driven mechanism is converted into a displacement output in a vertical direction through a motion conversion mechanism, and the driven mechanism is a cam direct-acting driven mechanism and comprises a cam rotating shaft, a cam, a first push rod and a second push rod;
the cam is connected with the cam rotating shaft, the first push rod and the second push rod are symmetrically distributed along the radial direction of the cam and are in contact with the cam, the cam rotating shaft is connected with a permanent magnet rotating shaft of the electromagnetic permanent magnet driving mechanism into a whole, the cam rotates and swings together under the driving of the cam rotating shaft, and the first push rod and the second push rod are pushed to do reciprocating motion when the cam rotates and swings.
5. The vibration control device for the curved thin-walled part based on permanent magnet driving according to claim 4, wherein the cam is elliptical in shape, the geometric center of the cam coincides with the rotating shaft of the cam, and the cam is in contact with the first push rod and the second push rod simultaneously, so that the first push rod and the second push rod are guaranteed to perform bidirectional linear motion.
6. The curved thin-walled part vibration control device based on permanent magnet drive of claim 4, wherein the cam linear motion follower further comprises a first roller and a second roller;
the first roller is arranged between the first push rod and the cam and is connected with the first push rod; the second roller is disposed between and connected to the second push rod and the cam.
7. The vibration control device for the curved thin-walled workpiece based on permanent magnet driving according to claim 4, wherein the motion transformation mechanism adopts flexible hinge transmission, and comprises a motion input component, a motion transformation intermediate component and a motion output component, wherein the motion transformation intermediate component is installed on the base, and the motion output component is also installed on the base;
the motion input component comprises two radial motion components, and the two radial motion components are respectively connected with a first push rod and a second push rod of the cam linear motion driven mechanism, so that the bidirectional linear motion of the first push rod and the second push rod is converted into the radial linear motion of the two push rods;
the motion input component and the motion output component are respectively connected with the motion conversion middle component, and the motion conversion middle component converts the radial linear motion of the motion input component into the vertical linear motion of the motion output component.
8. The device for controlling vibration of a curved thin-walled part based on permanent magnet drive of claim 1, wherein the motion transformation mechanism comprises an elastic tensioning frame and an inclined bossStage, ball and
a deformation direction output component, said
One end of the deformation direction output assembly is fixed with the base, the other end of the deformation direction output assembly is provided with a ball, the elastic tensioning frame is provided with an inclined boss, and the inclined boss is in contact with the ball;
the follower mechanism comprises an elliptical cam;
the periphery of the cam is provided with an elastic tensioning frame, the elastic tensioning frame generates deformation in the radial direction under the action of the external thrust of the elliptical cam, and the ball moves up and down on the inclined boss, so that the effect of moving the ball up and down on the inclined boss is achieved
And outputting the deformation to the displacement in the vertical direction of the output assembly.
9. The apparatus according to claim 1, wherein the motion transformation mechanism comprises a ball and
a deformation direction output component, said
One end of the deformation direction output assembly is fixed with the base, and the other end of the deformation direction output assembly is provided with a ball;
the driven mechanism comprises a rotatable circular table surface and a boss arranged on the circular table surface;
the ball of the motion conversion mechanism is arranged above the boss of the circular table top, the ball is in contact with the boss, the circular table top is driven by the rotating shaft of the permanent magnet to rotate, and the boss on the circular table top are enabled to rotate
The ball on the shape-changing output component is contacted and jacked up
The shape-changing output component enables the shape-changing output component to generate displacement output in the vertical direction.
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| CN201910590127.6A CN110332277B (en) | 2019-07-02 | 2019-07-02 | Curved surface thin-wall part vibration control device based on permanent magnet drive |
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| CN201910590127.6A CN110332277B (en) | 2019-07-02 | 2019-07-02 | Curved surface thin-wall part vibration control device based on permanent magnet drive |
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| CN110332277B true CN110332277B (en) | 2020-06-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3236122A (en) * | 1963-08-23 | 1966-02-22 | George A Biernson | Damped power drive |
| CN101004150A (en) * | 2007-01-18 | 2007-07-25 | 孙海潮 | Method for changing motion regulation of execution piece controlled by cam |
| US11353084B2 (en) * | 2013-03-15 | 2022-06-07 | Clearmotion Acquisition I Llc | Rotary actuator driven vibration isolation |
| CN105183000B (en) * | 2015-07-22 | 2018-10-12 | 杨斌堂 | Rotation moves multifreedom motion and platform occurs |
| CN105429353B (en) * | 2015-12-31 | 2018-04-17 | 上海交通大学 | Magnetic force actuated by cams unit and vibration platform apparatus and linear drive apparatus |
| CN105921392B (en) * | 2016-06-14 | 2018-11-16 | 上海交通大学 | It is conjugated the reciprocal pendular oscillation platform of the compound magnetic energy of constant diameter cam type and driving part and method |
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