CN219519464U

CN219519464U - Light-weight high-rigidity dual-frequency transducer

Info

Publication number: CN219519464U
Application number: CN202223300750.XU
Authority: CN
Inventors: 李英兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-08-15
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a light-weight high-rigidity dual-frequency transducer which comprises a locking component, a piezoelectric ceramic component, a pre-pressing component and an amplitude transformer, wherein the tail end of the amplitude transformer is symmetrically provided with a mounting part. The installation department comprises medial portion, flexible extension portion and lateral part, through the position of reasonable layout lateral part, satisfy overall structure and have two operating frequency, and installation department is the node when two operating frequency for the amplitude that the lateral part appears is as little as possible, effectively reduces the vibration that transmits to welding equipment, and the installation department is flexible structure simultaneously, can further reduce the ultrasonic energy to welding equipment's installation position direction diffusion, has ensured that ultrasonic energy effectively transmits to on the riving knife, promotes bonding processing effect. And the limiting protrusions are arranged on the riving knife mounting holes, so that the riving knife can be conveniently and rapidly positioned and assembled. In addition, the tail end of the amplitude transformer is provided with a balancing boss which is symmetrical with the locking part, so that the left and right symmetry of the quality is ensured, and the uniformity and symmetry of ultrasonic energy transmission are ensured.

Description

Light-weight high-rigidity dual-frequency transducer

Technical Field

The utility model relates to the technical field of transducers, in particular to a light-weight high-rigidity dual-frequency transducer.

Background

Ultrasonic bonding is the basic and key process of the packaging process of the semiconductor IC chip after manufacturing, while ultrasonic bonding energy converter is the core component for realizing the process, and is mainly used for the wire bonding process, so that stable mechanical connection and electric connection can be realized. The bonding transducers can be classified according to different bonding wires, including aluminum wire transducers, gold wire transducers, and the like. Generally, the transducer has only one fixed working frequency, and with the continuous development of the industry, dual-frequency and even multi-frequency transducers are developed.

The utility model application of the publication number CN107116019A, named as a double-frequency ultrasonic vibration processing transducer and a working mode thereof, discloses a double-frequency ultrasonic vibration processing transducer and a working mode thereof, wherein the double-frequency ultrasonic vibration processing transducer comprises a tool head, a collet chuck, a luffing rod, piezoelectric ceramics and a pretension screw component, the front end part of the luffing rod is provided with an elastic chuck, the tool head is inserted into the elastic chuck, and the collet chuck is sleeved on the elastic chuck and enables the elastic chuck to clamp the tool head; the piezoelectric ceramic is arranged on the tail end face of the amplitude transformer through a pre-tightening screw component; the double-frequency working mode can be realized, but the joint ring of the amplitude transformer is directly formed by radial protrusion of the tail end part of the amplitude transformer, and the joint ring is a position where the transducer is connected with and installed on the welding equipment, so that vibration energy generated when the transducer works is conducted to the welding equipment through the joint ring, the ultrasonic energy is difficult to ensure to be effectively transferred to the tool head, and the processing effect is influenced.

Disclosure of Invention

Aiming at the defects, the utility model aims to provide the light-weight high-rigidity double-frequency transducer which has reasonable structural design and can effectively reduce the diffusion of ultrasonic energy to the installation position direction of welding equipment.

The technical scheme adopted by the utility model for achieving the purpose is as follows: the utility model provides a light-weight high rigidity dual-frequency transducer, its includes locking part, piezoceramics subassembly, pre-compaction subassembly and amplitude transformer, the amplitude transformer is including preceding tip, middle part and the tail end portion that connects gradually, the both ends symmetry of tail end portion is equipped with the installation department, and this installation department is including the inboard portion, flexible extension portion and the outside portion that connect gradually for the outside portion is connected through flexible structure outside portion, is flexible connection between installation portion and the amplitude transformer promptly.

The flexible extension portion is parallel to the central axis of the amplitude transformer, the inner side portion and the outer side portion are perpendicular to the flexible extension portion, the outer side portion is located at the rear side position of the tail end portion, the outer side portion is provided with a mounting hole, the riving knife is arranged on the front end portion through the locking component, and the piezoelectric ceramic component is arranged on the tail end portion through the pre-pressing component.

As a preferable scheme of the utility model, the front end part is provided with a riving knife hole which vertically penetrates through the front end part, deformation grooves consistent with the trend of the long side of the amplitude transformer are symmetrically arranged on two sides of the riving knife hole, and the inner wall of the riving knife hole is provided with a limiting bulge. After the riving knife is inserted into the riving knife mounting hole, the riving knife can be rapidly positioned through the limiting protrusion, the assembly precision is high, the positioning effect is good, and the workability is further ensured.

As a preferable mode of the utility model, the front end part is provided with a locking hole which horizontally penetrates through the front end part, the locking part is a screw, and a balancing boss with the same mass as the head part of the screw is arranged at one side position of the front end part corresponding to the locking hole. The balancing boss is used for balancing the head of the screw assembled on the other side, ensures the bilateral symmetry of the mass and ensures the uniformity and symmetry of ultrasonic energy transmission.

As a preferred embodiment of the present utility model, a through hole is provided at a connection portion between the inner side portion and the tail end portion, and the through hole is used for reducing vibration transmitted to the outer side portion when the transducer is operated.

As a preferred embodiment of the present utility model, the vertical distance between the inner side and the outer side is preferably 2-4mm, which further ensures that the outer side is a node at both operating frequencies, i.e. where vibrations are minimal. Wherein the first operating frequency is 136-143kHz and the second operating frequency is 80-95kHz. The perpendicular distance between the inner side portion and the end face of the tail end portion is preferably 1.6-2mm to ensure that the node position is at the inner side portion.

In a preferred embodiment of the present utility model, an outer dimension of one end of the intermediate portion near the distal end portion is gradually reduced, and a side surface of the intermediate portion is a curved surface.

As a preferred scheme of the utility model, the pre-pressing assembly comprises a pre-pressing screw and a back cover plate, wherein the back cover plate is provided with a through hole matched with the pre-pressing screw, and the end part of the through hole is provided with a countersunk head position.

As a preferable scheme of the utility model, the outline dimension of one end of the back cover plate, which is close to the piezoelectric ceramic component, is gradually increased, and the side surface of the back cover plate is an arc curved surface.

As a preferable scheme of the utility model, the total length of the light-weight high-rigidity dual-frequency transducer is smaller than 40mm, the volume is small, the weight is light, and meanwhile, the amplitude transformer is made of titanium alloy, so that the rigidity of the whole structure can be improved, the weight can be reduced, and the service life can be prolonged.

The beneficial effects of the utility model are as follows: the installation part comprises the inner part, the flexible extension part and the outer part, and by reasonably arranging the positions of the outer part, the installation part meets the requirement that the whole structure has two working frequencies, and the installation part is a node, namely the vibration minimum position, when the two working frequencies are used, so that the vibration of the outer part is as small as possible, the vibration transmitted to the welding equipment is effectively reduced, and meanwhile, the inner part is matched with the outer part through the flexible extension part to form the flexible structure, the diffusion of ultrasonic energy to the installation position direction of the welding equipment can be further reduced, the ultrasonic energy is ensured to be effectively transmitted to the riving knife, and the bonding processing effect is improved. And the limiting protrusions are arranged on the riving knife mounting holes, so that the riving knives can be conveniently and rapidly positioned and assembled, and convenience is brought to assembly operation. In addition, the tail end of the amplitude transformer is provided with a balancing boss which is symmetrical with the locking part, so that the left and right symmetry of the quality is ensured, and the uniformity and symmetry of ultrasonic energy transmission are ensured.

The utility model will be further described with reference to the drawings and examples.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic exploded view of the present utility model.

FIG. 3 is a schematic perspective view of the horn of the present utility model.

FIG. 4 is a schematic cross-sectional view of the horn of this utility model.

FIG. 5 is a schematic top view of the horn of this utility model.

Fig. 6 is a schematic view of the low frequency mode of the present utility model.

Fig. 7 is a schematic view of the high frequency mode of the present utility model.

Detailed Description

Examples: referring to fig. 1 to 5, the utility model provides a light-weight high-rigidity dual-frequency transducer, which comprises a riving knife 1, a locking part 2, a piezoelectric ceramic component 3, a pre-pressing component 4 and a amplitude transformer 5. The total length of the light-weight high-rigidity double-frequency transducer is smaller than 40mm, the volume is small, the weight is light, meanwhile, the amplitude transformer 5 is made of titanium alloy, the rigidity of the whole structure can be improved, the weight is reduced, and the service life is prolonged.

The horn 5 includes a front end portion 51, an intermediate portion 52 and a rear end portion 53 which are sequentially connected, wherein the outer dimension of one end of the intermediate portion 52 near the front end portion 51 is gradually reduced, and the side surface of the intermediate portion 52 is a curved arc surface.

The two ends of the tail end 53 are symmetrically provided with mounting parts, the mounting parts comprise an inner side 531, a flexible extension 532 and an outer side 533 which are sequentially connected, the flexible extension 532 is parallel to the central axis of the amplitude transformer 5, the inner side 531 and the outer side 533 are perpendicular to the flexible extension 532, the front end of the flexible extension 532 is connected with the inner side 531, the rear end extends to the rear side position of the tail end 53 and is connected with the outer side 533, and the inner side 531 and the outer side 533 form a step structure. Preferably, the vertical distance between the inner side 531 and the outer side 533 is 2-4mm, preferably 3mm, to ensure that the outer side 533 is at a node, i.e. vibration is minimal, at both operating frequencies. The inner side 531 is spaced from the distal end surface of the tail end 53 by a vertical distance of 1.6-2mm, preferably 1.8mm, to ensure the node position at the inner side 531. Preferably, a through hole 5311 is provided at the junction of the inner portion 531 and the tail portion 53, the through hole being configured to reduce vibrations conducted to the outer portion 533 during operation of the transducer. The outer side part is connected through the outer side part of the flexible structure, namely, the mounting part is in flexible connection with the amplitude transformer. And vibration can be reduced.

A mounting hole 5331 is provided in the outer portion 533 to form a flange for easy mounting on a mounting member of a welding apparatus.

The riving knife 1 is arranged on the front end part 51 through the locking part 2, specifically, a riving knife mounting hole 511 which vertically penetrates through the front end part 51 is formed in the front end part 51, deformation grooves 512 which are consistent with the long side trend of the amplitude transformer 5 are symmetrically formed in two sides of the riving knife mounting hole 511, and limiting protrusions 513 are formed in the inner wall of the riving knife mounting hole 511. The thickness of the limit projection 513 is preferably 1.2-4mm so that the top of the riving knife hole 511 is non-circular and the lower portion of the riving knife hole 511 is circular. After the riving knife 1 is inserted into the riving knife mounting hole 511, the riving knife 1 can be rapidly positioned through the limiting protrusions 513, the assembly precision is high, the positioning effect is good, and the workability is further guaranteed. The front end portion 51 is provided with a locking hole penetrating horizontally, and the distance between the locking hole and the end portion of the front end portion 51 is preferably 3.9mm. The locking member 2 is preferably a screw, and a balancing boss 514 having the same mass as the head of the screw is provided at a position of the front end 51 corresponding to the locking hole. The outer diameter of the balancing boss 514 is 2.2-4mm, and a central hole corresponding to the locking part 2 is formed in the central position of the balancing boss 514. The balancing boss 514 is used to balance the weight of the head of the screw mounted on the other side, reducing the effect of the screw on the longitudinal vibration of the transducer.

The piezoelectric ceramic component 3 is arranged on the tail end 53 through a pre-pressing component 4. The pre-pressing assembly 4 comprises pre-pressing screws 41 and a rear cover plate 42, wherein through holes matched with the pre-pressing screws 41 are formed in the rear cover plate 42, and countersunk positions are formed in the end portions of the through holes. After the installation, the head of the pre-pressing screw 41 is positioned in the countersunk head, so that the assembly is tight and the vibration conduction is facilitated. The external dimension of the end, close to the piezoelectric ceramic component 3, of the rear cover plate 42 is gradually increased, the side surface of the rear cover plate 42 is an arc curved surface, and structural rigidity can be improved by adopting arc curved surface filtration.

In operation, referring to fig. 6 and 7, the outer side 533 of the light-weight high-rigidity dual-frequency transducer is a node at two working frequencies of 80kHz and 140kHz, so that the amplitude of the outer side 533 is as small as possible, the vibration transmitted to the welding equipment is effectively reduced, meanwhile, the diffusion of ultrasonic energy in the direction of the installation position of the welding equipment can be further reduced through the cooperation of the inner side 531 and the flexible extension 532, the ultrasonic energy is ensured to be effectively transmitted to the riving knife 1, and the bonding processing effect is improved.

Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way, and other transducers identical or similar thereto are used within the scope of the present utility model.

Claims

1. The utility model provides a light high rigidity dual-frequency transducer, its includes locking part, piezoceramics subassembly, pre-compaction subassembly and amplitude transformer, its characterized in that: the amplitude transformer comprises a front end part, a middle part and a tail end part which are sequentially connected, wherein the two ends of the tail end part are symmetrically provided with mounting parts, each mounting part comprises an inner side part, a flexible extension part and an outer side part which are sequentially connected, the flexible extension part is parallel to the central axis of the amplitude transformer, the inner side portion and the outer side portion are perpendicular to the flexible extension portion, and the outer side portion is located at a rear side position of the tail end portion, the outer side part is provided with a mounting hole, the riving knife is arranged on the front end part through a locking part, the piezoelectric ceramic component is arranged on the tail end part through a pre-pressing component.

2. The light-weight high-rigidity dual-frequency transducer according to claim 1, wherein a riving knife hole which vertically penetrates through the front end part is formed in the front end part, deformation grooves consistent with the long-side trend of the amplitude transformer are symmetrically formed in two sides of the riving knife hole, and limiting protrusions are arranged on the inner wall of the riving knife hole.

3. The light-weight high-rigidity dual-frequency transducer according to claim 1, wherein a locking hole horizontally penetrating the front end part is formed in the front end part, the locking part is a screw, and a balancing boss with the same mass as the head part of the screw is arranged at one side of the front end part corresponding to the locking hole.

4. The lightweight high stiffness dual frequency transducer of claim 1, wherein the junction of the inner portion and the tail portion is provided with a through hole.

5. The lightweight high stiffness dual frequency transducer of claim 1 wherein the vertical distance between the inner and outer sides is 2-4mm.

6. The lightweight high stiffness dual frequency transducer of claim 1 wherein the inner side is a perpendicular distance of 1.6-2mm from the distal face of the tail end.

7. The lightweight high stiffness dual frequency transducer of claim 1 wherein the intermediate portion has a tapered profile at an end thereof adjacent the front end portion, the intermediate portion having a side surface that is curved in an arc.

8. The light weight high stiffness dual frequency transducer of claim 1 wherein the pre-compression assembly comprises a pre-compression screw and a back plate having a bore adapted to the pre-compression screw and having a countersunk end.

9. The lightweight high stiffness dual frequency transducer of claim 8, wherein the back plate has a progressively larger overall dimension proximate one end of the piezoelectric ceramic assembly, and wherein the back plate has a curved side surface.

10. A lightweight high stiffness dual frequency transducer according to any of claims 1 to 9 having a total length of less than 40mm.