Bonding device for driving vibration element of magnetostrictive transducer

Abstract

The invention belongs to the technical field of underwater acoustic transducer production, and discloses a magnetostriction transducer driving vibration element bonding device which comprises a bottom plate, a top plate and two semi-cylindrical clamps symmetrically installed on the bottom plate, four double-end supporting rods are evenly distributed at the four corners between the bottom plate and the top plate, and the two semi-cylindrical clamps are symmetrically installed on the bottom plate. Two limiting grooves are symmetrically formed in each semi-cylindrical clamp and used for installing a driving vibration element, a top pressing plate is arranged between the driving vibration element and the top plate, four stress application nuts are evenly distributed in the middle of the top plate, correspond to the driving vibration elements one to one and are concentric, and the stress application nuts are in threaded connection with the top plate. And the screw is used for screwing and applying axial pressing force to the driving vibration element. According to the bonding device for the driving vibration element of the magnetostrictive transducer, the process of bonding operation of the driving vibration element is simplified, the clamp can be assembled through fastening of conventional screws, complexity of manual operation is reduced, operation feasibility is improved, bonding precision is improved, bonding efficiency is improved, and prestress and stress uniformity are accurately controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater acoustic transducer production, and in particular relates to a bonding device for a driving vibrator of a magnetostrictive transducer. Background Art

[0002] In order to improve the application performance of the iron gallium rod and the permanent magnet in the magnetostrictive transducer, the two are usually bonded. The driving vibrator composed of the iron gallium rod and the permanent magnet is the core component of the magnetostrictive transducer, which is usually responsible for the transmission and reception of sound waves, and good assembly accuracy is crucial to the performance of the magnetostrictive transducer. Among them, the iron gallium rod, as a magnetostrictive material, is bonded with the permanent magnet to form a closed magnetic circuit. By accurately arranging the permanent magnet, optimizing the magnetic circuit design, and reducing the magnetic field leakage, the efficiency of magnetic energy utilization can be improved. The bonding quality of the driving vibrator composed of the iron gallium rod and the permanent magnet directly affects the acoustic performance of the transducer, including frequency response and signal strength. Therefore, ensuring the consistency of the bonding between the iron gallium rod and the permanent magnet and accurately controlling the bonding position and pressure of the driving vibrator can not only improve the performance and reliability of the magnetostrictive transducer, but also has important significance for promoting the development of underwater acoustic technology.

[0003] In contrast, the Chinese patent with announcement number CN114833749A discloses a transducer assembly and fixing device, comprising: a base, a support rod, an upper cover plate and a fixing nut; the upper cover plate is parallel to the base and is located on the top of the base; the support rod is provided with multiple ones, which are used to fix the edges of the upper cover plate and the base; the fixing nuts correspond to the support rods one by one, and are used to fix the upper cover plate and the support rods; a mounting hole is provided in the middle of the upper cover plate for fixing the transducer by bolts; the bolts adjust their clamping force by rotating the torque wrench; a jack mounting hole for fixing the lifting device is provided in the middle of the upper surface of the base, which solves the problem of uneven force on the transducer in the prior art and enables the prestress of the transducer to be accurately controlled.

[0004] However, the above patent has a complex structure, which increases the cost of manufacturing and maintenance. The hydraulic system and pressure gauge that require precise control may increase the operational complexity of the device and require the operator to have certain skills and knowledge. The hydraulic system and pressure gauge need regular maintenance and calibration to ensure accurate control of prestress, which increases the maintenance cost and workload of long-term operation, and if improperly maintained, it may affect the performance of the device and the assembly quality of the transducer. The overall structure is relatively bulky, especially the inclusion of the jack and the hydraulic system, which limits its use in space-constrained environments and increases the difficulty of transportation and storage, so a new device needs to be designed. Summary of the invention

[0005] The object of the present invention is to provide a bonding device for a magnetostrictive transducer driving vibrator to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A bonding device for a magnetostrictive transducer driving vibrator, comprising a bottom plate and a top plate, four double-headed support rods are evenly distributed at the four corners between the bottom plate and the top plate, and two semi-cylindrical clamps symmetrically installed on the bottom plate, each of the semi-cylindrical clamps is symmetrically provided with two limiting grooves for installing the driving vibrator, a top pressure plate is provided between the driving vibrator and the top plate, four force nuts are evenly distributed in the middle of the top plate, the force nuts correspond to the driving vibrator one by one and are concentric, the force nuts are threadedly connected to the top plate, and are used to be tightened to apply axial clamping force to the driving vibrator.

[0008] Furthermore: both ends of the double-headed support rod are respectively provided with limiting bosses for limiting the total height, and both ends of the double-headed support rod are respectively connected with the bottom plate and the top plate with bolts.

[0009] Furthermore: the opposite surfaces of the bottom plate and the top plate are provided with parallelism requirements to ensure the accuracy of relative dimensions.

[0010] Furthermore: the semi-cylindrical clamp includes an L-shaped front pressure plate and a rear pressure plate, the limiting groove is arranged between the L-shaped front pressure plate and the rear pressure plate, and two groups of semicircular grooves consistent with the outer diameter of the driving vibrator are used to limit the circumferential size of the driving vibrator. The height of the limiting groove is smaller than the total height of the driving vibrator, and a gap for the adhesive to flow out is arranged between the opposite surfaces of the L-shaped front pressure plate and the rear pressure plate.

[0011] Furthermore: the L-shaped front pressure plate is provided with a verticality requirement, the L-shaped front pressure plate is connected to the bottom plate by bolts, and the rear pressure plate is connected to the L-shaped front pressure plate by bolts.

[0012] Furthermore: the upper and lower surfaces of the top pressure plate are provided with the same surface features and parallelism requirements to improve the uniformity of force.

[0013] Furthermore: the top of the force nut includes both an outer hexagonal structure and an inner hexagonal structure, and a smooth truncated cone is provided at the bottom. The force nut and the top plate are connected by fine-pitch threads, which is convenient for tightening the force nut with a torque wrench and stably pressing the top plate down by the smooth truncated cone. The force nut is fixed with a torque wrench set to a fixed value to ensure the consistency of the force applied to the driving vibrator.

[0014] Compared with the prior art, the beneficial effects are:

[0015] 1. Improve operational feasibility: The process of bonding the drive vibrator is simplified, and the assembly of the fixture can be achieved through conventional screw tightening, reducing the complexity of manual operation. The operation is easier and faster. Through standardized components and steps, even non-professionals can assemble according to the prescribed process. In addition, the design of the device allows for quick adjustment and replacement of components, providing a certain degree of flexibility to accommodate drive vibrators of different specifications or different assembly requirements;

[0016] 2. Improve bonding accuracy: Through the design of the circumferential limit fixture, the precise positioning of the iron gallium rod and the permanent magnet during the pretreatment process is ensured, and the outer diameter accuracy and axial consistency of the bonding are improved by tightening the nut to apply a constant clamping force;

[0017] 3. Improve bonding efficiency: Standard bonding process and precise assembly positioning help improve production efficiency. One to four groups of drive oscillators can be bonded at a time according to usage requirements, making the assembly process more efficient and reducing time and resource consumption in production;

[0018] 4. Precise control of prestress: By rotating the torque wrench to adjust the tightening force of the bolt, the prestress of the transducer can be precisely controlled. This is essential to ensure the stability and efficiency of the transducer during operation, and can effectively avoid performance degradation or equipment damage caused by excessive or insufficient prestress;

[0019] 5. Uniform force: The design of the device makes the driving vibrator more evenly stressed during the assembly process, which is mainly achieved through the coordinated action of the bottom plate, double-headed support rod, top plate and force nut. Together, they ensure that the driving vibrator is subjected to balanced pressure in each axial direction during bonding and assembly. Uniform force helps to improve the electromechanical conversion efficiency of the transducer, reduce energy loss, and extend the service life of the transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a bonding device for a magnetostrictive transducer driving vibrator according to the present invention;

[0021] Figure 2 It is a schematic diagram of a force nut of a bonding device for a magnetostrictive transducer driving vibrator according to the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of a driving vibrator of a bonding device for a driving vibrator of a magnetostrictive transducer according to the present invention;

[0023] Figure 4 It is a schematic diagram of a semi-cylindrical clamp of a bonding device for a magnetostrictive transducer driving vibrator described in the present invention.

[0024] In the accompanying drawings: 1, bottom plate; 2, double-headed support rod; 3, top plate; 4, top pressure plate; 5, force nut; 6, driving vibrator; 6-1, short iron gallium; 6-2, long iron gallium; 6-3, permanent magnet; 7, semi-cylindrical clamp; 7-1, L-shaped front pressure plate; 7-2, rear pressure plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 4 A bonding device for a magnetostrictive transducer driving vibrator 6 comprises a bottom plate 1 and a top plate 3, four double-headed support rods 2 are evenly distributed at the four corners between the bottom plate 1 and the top plate 3, and two semi-cylindrical clamps 7 are symmetrically installed on the bottom plate 1, and two limiting grooves are symmetrically arranged in each semi-cylindrical clamp 7 for installing the driving vibrator 6, a top pressure plate 4 is arranged between the driving vibrator 6 and the top plate 3, and four force nuts 5 are evenly distributed in the middle of the top plate 3, the force nuts 5 correspond to the driving vibrator 6 one by one and are concentric, the force nuts 5 are threadedly connected to the top plate 3, and are used for tightening to apply axial clamping force to the driving vibrator 6.

[0027] Furthermore: limiting bosses are respectively provided at both ends of the double-headed support rod 2 to limit the total height, and the two ends of the double-headed support rod 2 are respectively connected with the bottom plate 1 and the top plate 3 by bolts; the relative surfaces of the bottom plate 1 and the top plate 3 are provided with parallelism requirements to ensure the accuracy of relative dimensions; the semi-cylindrical clamp 7 includes an L-shaped front pressure plate 7-1 and a rear pressure plate 7-2, and the limiting groove is arranged between the L-shaped front pressure plate 7-1 and the rear pressure plate 7-2, and two groups of semicircular grooves consistent with the outer diameter of the driving vibrator 6 are used to limit the circumferential size of the driving vibrator 6, and the height of the limiting groove is less than the total height of the driving vibrator 6, and the L-shaped front pressure plate 7-1 and the rear pressure plate A gap is provided between the opposite surfaces of 7-2 for the outflow of adhesive; the L-shaped front pressure plate 7-1 is provided with verticality requirements, the L-shaped front pressure plate 7-1 is bolted to the bottom plate 1, and the rear pressure plate 7-2 is bolted to the L-shaped front pressure plate 7-1; the upper and lower surfaces of the top pressure plate 4 are provided with the same surface features and parallelism requirements to improve the uniformity of force; the top of the force nut 5 includes both an external hexagonal structure and an internal hexagonal structure, and a smooth frustum is provided at the bottom end. The force nut 5 is connected to the top plate 3 with a fine-pitch thread, which is convenient for tightening the force nut 5 with a torque wrench and fixing it, and stably fixing the top pressure plate 4 by pressing down the smooth frustum.

[0028] Working principle: fix the horizontal surfaces of the L-shaped front pressure plates 7-1 of the two sets of semi-cylindrical clamps 7 on the bottom plate 1 respectively, position them through the limit boss of the double-headed support rod 2, connect the bottom plate 1 and the top plate 3, and fix them through bolt connection, clean the contact surfaces of the short iron gallium 6-1, the long iron gallium 6-2 and the permanent magnet 6-3, apply a proper amount of epoxy resin, and make sure that the magnetic poles of the two permanent magnets 6-3 keep the same direction, preliminarily combine them into the driving vibrator 6, and then connect the four sets of driving vibrators 6 to the L-shaped front pressure plate 7-1 and the rear pressure plate 7-2 respectively. The limiting groove contacts the L-shaped front pressure plate 7-1, and the vertical surface of the rear pressure plate 7-2 is fixedly connected by bolts to clamp the driving vibrator 6 to achieve the consistency of the circumferential size of the driving vibrator 6. The top pressure plate 4 is placed on the upper surface of the four groups of driving vibrators 6, and then the four force nuts 5 are tightened and passed through the top plate 3 to make its smooth boss push the top pressure plate 4. Then a conventional torque wrench is used to set a fixed value, and the outer hexagonal structure of the force nut 5 is tightened. The force nut 5 transmits the clamping force to the driving vibrator 6 through the top pressure plate 4 to form a bonding force.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bonding device for a magnetostrictive transducer driving element, comprising a bottom plate (1) and a top plate (3), wherein four double-headed support rods (2) are evenly distributed at four corners between the bottom plate (1) and the top plate (3), characterized in that: It also includes two semi-cylindrical clamps (7) symmetrically installed on the base plate (1), each of the semi-cylindrical clamps (7) is symmetrically provided with two limiting grooves for installing the driving vibrator (6), a top pressure plate (4) is provided between the driving vibrator (6) and the top plate (3), four force nuts (5) are evenly distributed in the middle of the top plate (3), the force nuts (5) correspond to the driving vibrator (6) one by one and are concentric, the force nuts (5) are threadedly connected to the top plate (3) and are used to tighten to apply axial pressure to the driving vibrator (6).

2. The bonding device for a magnetostrictive transducer driving element according to claim 1, characterized in that: Limiting bosses are respectively provided at both ends of the double-headed support rod (2) for limiting the total height, and the two ends of the double-headed support rod (2) are respectively connected to the bottom plate (1) and the top plate (3) by bolts.

3. The bonding device for a magnetostrictive transducer driving element according to claim 1, characterized in that: The opposing surfaces of the bottom plate (1) and the top plate (3) are provided with parallelism requirements.

4. The bonding device for a magnetostrictive transducer driving element according to claim 1, characterized in that: The semi-cylindrical clamp (7) comprises an L-shaped front pressure plate (7-1) and a rear pressure plate (7-2); the limiting groove is arranged between the L-shaped front pressure plate (7-1) and the rear pressure plate (7-2); two groups of semi-circular grooves consistent with the outer diameter of the driving vibrator (6) are used to limit the circumferential size of the driving vibrator (6); the height of the limiting groove is less than the total height of the driving vibrator (6); and a gap for the adhesive to flow out is arranged between the opposing surfaces of the L-shaped front pressure plate (7-1) and the rear pressure plate (7-2).

5. The bonding device for a magnetostrictive transducer driving element according to claim 4, characterized in that: The L-shaped front pressure plate (7-1) is provided with a verticality requirement, the L-shaped front pressure plate (7-1) is bolted to the bottom plate (1), and the rear pressure plate (7-2) is bolted to the L-shaped front pressure plate (7-1).

6. The bonding device for a magnetostrictive transducer driving element according to claim 1, characterized in that: The upper and lower surfaces of the top pressure plate (4) are provided with the same surface features and parallelism requirements.

7. The bonding device for a magnetostrictive transducer driving element according to claim 1, characterized in that: The top of the force nut (5) includes both an outer hexagonal structure and an inner hexagonal structure, and the bottom is provided with a smooth truncated cone. The force nut (5) is connected to the top plate (3) by means of a fine thread. The force nut (5) is fixed by using a torque wrench set to a fixed value to ensure the consistency of the force applied to the driving vibrator.

Images