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Index type ultrasound longitudinal vibration amplitude-change bar with hole formed in axial direction of output end

A horn and output technology, applied in the field of mechanical vibration, can solve the problems of shortening the service life of the transducer, limited amplitude amplification factor, increasing cost, etc., and achieves the effect of improving work efficiency and amplitude amplification factor.

Inactive Publication Date: 2015-07-22
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amplitude amplification factor of the traditional solid horn with variable cross-section is limited, and it often cannot meet the requirements for large-amplitude power ultrasonic applications.
The first solution is to cascade multi-stage horns together, the second is to increase the input power of the transducer, the first method will increase the cost, and the second method will shorten the transducer service life

Method used

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  • Index type ultrasound longitudinal vibration amplitude-change bar with hole formed in axial direction of output end

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] exist figure 1 Among them, the exponential ultrasonic longitudinal vibration horn with an axial opening at the output end of the present invention is composed of the horn 1 . In this example, the two ends of the horn 1 are parallel planes perpendicular to the center line, and the side is a rod-shaped body with an exponential rotating surface. The geometric shape of the side is a curve in the Cartesian coordinate system

[0018] y=(D / 2)e -βx ,in

[0019] is the rotating surface formed by the generatrix and the x-axis is the rotation axis, 0≤x≤length L of the horn, where y is the radius of the cross-section at the coordinate x, and D is the diameter of the large end of the horn 1. When in use, change The large end of the horn 1 is connected to the ultrasonic transducer, d is the diameter of the small end of the horn 1, and the small end of the horn 1 is an output end. The length L of the horn in this embodiment is 120 mm, the diameter D of the large end of the horn 1...

Embodiment 2

[0022] In this example, the two ends of the horn 1 are parallel planes perpendicular to the center line, and the side is a rotating surface of an exponential curve. The geometric shape of the side is a curve in the rectangular coordinate system

[0023] y=(D / 2)e -βx ,in

[0024] is the rotating surface formed by the generatrix and the x-axis is the rotation axis, 0≤x≤length L of the horn, where y is the radius of the section at the coordinate x, D is the diameter of the large end of the horn 1, and d is the horn 1, the large end of the horn 1 is the input end, and the small end is the output end. The horn length L, the diameter D of the large end of the horn 1, the geometrical dimensions of the diameter d of the small end of the horn 1, and the materials used in this embodiment are the same as in Example 1. A rectangular through hole is processed at a distance of 2 mm from the small end t, the length b of the rectangular through hole is 18 mm, the length b of the rectangul...

Embodiment 3

[0026] In this example, the two ends of the horn 1 are parallel planes perpendicular to the center line, and the side is a rotating surface of an exponential curve. The geometric shape of the side is a curve in the rectangular coordinate system

[0027] y=(D / 2)e -βx ,in

[0028] is the rotating surface formed by the generatrix and the x-axis is the rotation axis, 0≤x≤length L of the horn. In the formula, y is the radius of the section at the coordinate x, D is the diameter of the large end of the horn 1, d is the diameter of the small end of the horn 1, the large end of the horn 1 is the input end, and the small end is the output end. The horn length L of this embodiment, the diameter D of the large end of the horn 1, the geometric dimensions of the diameter d of the small end of the horn 1, and the materials for making it are the same as those in Example 1. A rectangular through hole is processed at a distance of 21.6 mm from the small end t, the distance t between the ou...

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Abstract

Provided is an index type ultrasound longitudinal vibration amplitude-change bar with a hole formed in the axial direction of the output end. The rectangular through hole is machined in the inner side of the small end in the axial direction of the center line of the amplitude-change bar, the distance t between the outer wall of the rectangular through hole and the small end is 2 mm-0.18 mm, the length of the amplitude-change bar is L, and according to the geometric shape, the amplitude-change bar is a rod-like body with the two end faces being parallel planes perpendicular to the center line and the side face being an index revolution surface. Because the rectangular through hole is formed in the position, away from the output end by a certain distance, in the axial direction of the center line of the index type amplitude-change bar, when the amplitude-change bar works at a longitudinal vibration resonant frequency position, the output end further has excited bending vibration components besides longitudinal vibration components of the amplitude-change bar; due to the superposition of the longitudinal vibration components and the bending vibration components, the amplitude amplification coefficient of the holed index amplitude-change bar is increased by 1.8-4.8 times compared with that of a solid index type amplitude-change bar the same as the holed index amplitude-change bar in shape and material, and working efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration, and in particular relates to an ultrasonic horn of an ultrasonic transducer. Background technique [0002] Ultrasonic horn can be widely used in chemical industry, petroleum, cleaning, mechanical processing, food, medicine, automobile, instrumentation, textile, mechanical processing (such as turning, drilling, grinding, plastic welding, metal welding) and other fields. It is an important component in the ultrasonic vibration system. It is connected with the ultrasonic transducer. Its main function is to amplify the particle displacement or velocity of the mechanical vibration output by the ultrasonic transducer, and to concentrate the ultrasonic energy on the area of ​​the output end of the horn. It plays the role of energy gathering, also known as gear lever or energy concentrator. Usually the amplitude of the output end of the ultrasonic transducer is small, only a few microns, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B3/02
Inventor 贺西平
Owner SHAANXI NORMAL UNIV
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