A forming tool and forming method for pressure focusing spherical surface of acoustic tweezers

Abstract

The invention discloses a forming tooling for an acoustic tweezers pressure focusing spherical surface. The forming tooling comprises a lower base, wherein a plurality of guide posts are upwards arranged on the lower base; an upper base moveably penetrates through the guide posts; knobs used for downwards pushing the upper base to move are connected to the guide posts by threads; a cylindrical table and a guide base are upwards arranged on the lower base; a spherical groove is formed in the top end of the cylindrical table; a pressure ball is arranged at the spherical groove; a through hole is formed in the guide base and comprises a cylindrical table guide round hole and a transducer guide round hole which are communicated with each other; the inner wall, at the cylindrical table guide round hole, of the guide base is contacted with the outer side of the cylindrical table; the transducer guide round hole is used for attaching the whole side wall of a piezoelectric plate of an ultrasonic transducer to the inner wall, at the transducer guide round hole, of the guide base to move so as to contact the pressure ball, and the axial line of the transducer guide round hole penetrates through the sphere center of the pressure ball. The forming tooling is simple in structure, and a focusing spherical surface is easily formed on acoustic tweezers.

Description

technical field [0001] The invention belongs to the field of ultrasonic transducers, and more specifically relates to a forming tool and a forming method for a pressure focusing spherical surface of acoustic tweezers. Background technique [0002] Acoustic tweezers, referred to as acoustic tweezers, are one of the hot spots in the application research of high-frequency ultrasonic transducers in recent years. Similar to the principle of optical tweezers (abbreviated as optical tweezers), acoustic tweezers use the force of acoustic radiation to attract tiny objects by emitting highly focused ultrasonic beams, thereby realizing the capture and manipulation of tiny objects. The successful capture and manipulation of tiny objects is of great significance to the study of biological cells. The shortcomings of optical tweezers are: 1) high energy, which will cause local overheating of the captured object, resulting in cell death; 2) low power, it is difficult to capture and move bi...

AI Technical Summary

Problems solved by technology

The shortcomings of optical tweezers are: 1) high energy, which will cause local overheating of the captured object, resulting in cell death; 2) small force, it is difficult to capture and move biological cells of tens of microns or hundreds of microns

[0004] The existing pressure focusing is still being explored, and there are many problems, such as difficult alignment, poor effect for many materials, and it is difficult to achieve an f# value close to 1

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