阅读说明：本技术 超磁致伸缩窗形椭圆复合振动换能器及换能方法 (Giant magnetostrictive window-shaped elliptical composite vibration transducer and transduction method ) 是由 贺西平 刘强 于 2020-06-22 设计创作，主要内容包括：本发明涉及一种超磁致伸缩窗形椭圆复合振动换能器及换能方法,换能器包括从上往下依次设置的后盖板、振动伸缩单元、楔形块以及变幅杆；所述后盖板、振动伸缩单元以及楔形块相固定；所述楔形块与变幅杆固定连接；楔形块包括两个斜面,一个斜面与振动伸缩单元的下端面接触；另一个斜面与变幅杆的端面接触且通过螺杆固定；楔形块两个斜面之间的夹角为10～60°。楔形块将振动伸缩单元的产生的单一方向的振动转换成两个方向的椭圆复合振动,通过楔形块的角度和尺寸调整换能器输出频率和轨迹。本发明具有结构简单,漏磁小,实现振动轨迹可调的大振幅椭圆振动输出、功率输出大。(The invention relates to a giant magnetostrictive window-shaped elliptical composite vibration transducer and a transduction method, wherein the transducer comprises a rear cover plate, a vibration telescopic unit, a wedge-shaped block and an amplitude transformer which are sequentially arranged from top to bottom; the rear cover plate, the vibration telescopic unit and the wedge-shaped block are fixed; the wedge block is fixedly connected with the amplitude transformer; the wedge-shaped block comprises two inclined planes, and one inclined plane is contacted with the lower end face of the vibration telescopic unit; the other inclined plane is contacted with the end face of the amplitude transformer and is fixed through a screw; the included angle between two inclined planes of the wedge-shaped block is 10-60 degrees. The wedge block converts the single-direction vibration generated by the vibration telescopic unit into two-direction elliptical composite vibration, and the output frequency and the track of the transducer are adjusted through the angle and the size of the wedge block. The invention has simple structure and small magnetic leakage, realizes adjustable vibration track, large-amplitude elliptical vibration output and large power output.)

1. The utility model provides an oval compound vibration transducer of super magnetostrictive window shape which characterized in that: the giant magnetostrictive window-shaped elliptical composite vibration transducer comprises a rear cover plate (2), a vibration telescopic unit (4), a wedge-shaped block (5) and an amplitude transformer (7) which are sequentially arranged from top to bottom; the rear cover plate (2), the vibration telescopic unit (4) and the wedge-shaped block (5) are fixed; the wedge-shaped block (5) is connected with the amplitude transformer (7), and the wedge-shaped block (5) converts the vibration in a single direction into the elliptical compound vibration in two directions and adjusts the frequency and amplitude of the elliptical compound vibration.

2. The giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 1, characterized in that: the wedge-shaped block (5) comprises two inclined planes, and one inclined plane is in contact with the lower end face of the vibration telescopic unit (4); the other inclined plane is contacted with the end surface of the amplitude transformer (7) and is fixed through the screw (6); the included angle between two inclined planes of the wedge-shaped block is 10-60 degrees.

3. The giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 2, characterized in that: the vibration telescopic unit (4) comprises a giant magnetostrictive rod (10) and a coil (3) wound on the giant magnetostrictive rod (10); the rear cover plate (2), the vibration telescopic unit (4) and the wedge-shaped block (5) are fixed through a pretightening bolt (1).

4. The giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 3, characterized in that: both ends of the giant magnetostrictive rod (10) are sequentially provided with a permanent magnet (11) and a magnetizer (9) from inside to outside; the magnetizer (9) at the lower end of the giant magnetostrictive rod (10) is in contact with the inclined surface of the wedge block (5); the magnetizer (9) at the lower end of the giant magnetostrictive rod (10) is in contact with the rear cover plate (2).

5. A method of transducing a giant magnetostrictive window-shaped elliptical composite vibration transducer according to any one of claims 1 to 4, characterized in that:

the energy conversion method is that when the energy converter works, a high-frequency alternating current signal is applied to the vibration telescopic unit (4) to generate a high-frequency alternating magnetic field, the vibration telescopic unit (4) generates high-frequency telescopic vibration under the high-frequency alternating magnetic field, and the vibration in a single direction generated by the vibration telescopic unit (4) is converted into elliptical composite vibration in two directions through the wedge-shaped block (5) and transmitted to the amplitude transformer (7).

6. The transduction method of the giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 5, characterized in that: the specific transduction method comprises the following steps: an alternating magnetic field generated by an alternating current signal is applied to a coil (3) on a giant magnetostrictive rod (10), the giant magnetostrictive rod (10) generates single-direction vibration under the alternating magnetic field, the generated single-direction vibration is converted into elliptical composite vibration in two directions through a magnetizer (9) and a wedge-shaped block (5) and transmitted to an amplitude transformer (7), and the frequency and the amplitude of the elliptical composite vibration are adjusted through the included angle and the diameter of the wedge-shaped block (5).

7. The transduction method of the giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 5, characterized in that: the diameter of the wedge-shaped block (5) is larger than the length of the magnetizer (9) and smaller than a quarter wavelength corresponding to the vibration frequency of the transducer.

8. The transduction method of the giant magnetostrictive window-shaped elliptical composite vibration transducer according to claim 6, characterized in that: the length of the diameter of the wedge-shaped block (5) is 35-60 mm.

Technical Field

The invention belongs to the technical field of ultrasonic processing, and relates to a giant magnetostrictive window-shaped elliptical composite vibration transducer and a transduction method.

Background

The ultrasonic machining technology is a technology for applying ultrasonic vibration to precision or ultra-precision machining, and compared with common machining, the ultrasonic machining technology has the outstanding advantages of remarkably reducing cutting force, improving machining quality, reducing tool abrasion and improving machining efficiency; while the direction and form of the ultrasonic vibration output have important influence on the processing quality and the processing efficiency, compared with single-phase vibration, the elliptical vibration has lower cutting force and better process effect.

The conventional elliptical vibration needs two ultrasonic power supplies for driving, the circuit and the vibration device have complex structures and are difficult to adjust, and the application of the elliptical vibration in actual production is restricted; in addition, the power density of the piezoelectric ceramic is relatively low, and the piezoelectric transducer is difficult to realize high-power and large-amplitude ultrasonic vibration output.

Disclosure of Invention

The invention provides a giant magnetostrictive window-shaped elliptical composite vibration transducer which is simple in structure and capable of realizing high-power output and a transduction method, and aims to solve the technical problems that an existing transducer is complex in structure and low in output power.

In order to achieve the purpose, the invention adopts the following technical scheme:

a giant magnetostrictive window-shaped elliptical composite vibration transducer comprises a rear cover plate, a vibration telescopic unit, a wedge-shaped block and an amplitude transformer which are sequentially arranged from top to bottom; the rear cover plate, the vibration telescopic unit and the wedge-shaped block are fixed; the wedge block is connected with the amplitude transformer, and the wedge block converts the vibration in a single direction into the elliptical compound vibration in two directions and adjusts the frequency and amplitude of the elliptical compound vibration.

Further, the wedge-shaped block comprises two inclined planes, and one inclined plane is in contact with the lower end face of the vibration telescopic unit; the other inclined plane is contacted with the end face of the amplitude transformer and is fixed through a screw; the included angle between two inclined planes of the wedge-shaped block is 10-60 degrees.

Further, the vibration telescopic unit comprises a giant magnetostrictive rod and a coil wound on the giant magnetostrictive rod; the rear cover plate, the vibration telescopic unit and the wedge-shaped block are fixed through pretightening bolts.

Furthermore, permanent magnets and magnetizers are sequentially arranged at two ends of the giant magnetostrictive rod from inside to outside; the magnetizer at the lower end of the giant magnetostrictive rod is in contact with the inclined plane of the wedge-shaped block; and the magnetizer at the lower end of the giant magnetostrictive rod is in contact with the rear cover plate.

A transduction method of a giant magnetostrictive window-shaped elliptical composite vibration transducer comprises the steps that when the transducer works, a high-frequency alternating current signal is applied to a vibration telescopic unit to generate a high-frequency alternating magnetic field, the vibration telescopic unit generates high-frequency telescopic vibration under the high-frequency alternating magnetic field, and the vibration in a single direction generated by the vibration telescopic unit is converted into elliptical composite vibration in two directions through a wedge block and transmitted to an amplitude transformer.

Further, the specific transduction method is as follows: an alternating magnetic field generated by an alternating current signal is applied to a coil on the giant magnetostrictive rod, the giant magnetostrictive rod generates single-direction vibration under the alternating magnetic field, the generated single-direction vibration is converted into elliptical composite vibration in two directions through the magnetizer and the wedge block, the elliptical composite vibration is transmitted to the amplitude transformer, and the frequency and the amplitude of the elliptical composite vibration are adjusted through the included angle and the diameter of the wedge block (5).

Furthermore, the diameter of the wedge-shaped block should be larger than the length of the magnetizer and smaller than a quarter wavelength corresponding to the vibration frequency of the transducer.

Further, the length of the diameter of the wedge-shaped block is 35-60 mm.

The invention has the beneficial effects that:

1. the wedge-shaped block is arranged between the amplitude transformer and the vibration telescopic unit, so that the single-direction vibration generated by the vibration telescopic unit is converted into the two-direction elliptical compound vibration to be transmitted to the amplitude transformer, and the frequency and the amplitude of the elliptical compound vibration are adjusted; the device has simple structure.

2. According to the invention, the vibration telescopic unit comprises the giant magnetostrictive rod, the coil wound on the giant magnetostrictive rod, the permanent magnets and the magnetizers at two ends of the giant magnetostrictive rod, so that the transducer can generate ultrasonic elliptical vibration with larger amplitude, the cutting force is reduced, the processing quality is improved, the cutter abrasion is reduced, and the processing efficiency is improved.

3. In the invention, the rear cover plate, the giant magnetostrictive rod and the wedge-shaped block are connected through the pre-tightening bolts, and the pre-tightening force exerted on the pre-tightening bolts is the same, thereby being beneficial to improving the stability of the transducer during working.

4. The included angle between the two inclined planes of the wedge-shaped block is 10-60 degrees; the diameter d of the wedge-shaped block is larger than the length of the magnetizer and smaller than a quarter wavelength corresponding to the vibration frequency of the transducer; the diameter length of the first right-angle surface of the wedge block is 35-60 mm, the resonance frequency of the transducer and the output elliptical vibration can be properly adjusted by changing the angle and the diameter of the wedge block, and meanwhile, the output frequency and the output displacement of the vibration telescopic unit are changed, so that the elliptical composite vibration tracks output by the amplitude transformer are different.

Drawings

FIG. 1 is a front view of a giant magnetostrictive window-shaped elliptical composite transducer of the present invention;

FIG. 2 is a left side view of a giant magnetostrictive window-shaped elliptical composite transducer of the present invention;

FIG. 3 is a schematic structural view of a giant magnetostrictive rod of the present invention;

FIG. 4 is an elliptical vibration trace plot for the transducer of experiment 1;

FIG. 5 is a graph of the lateral and longitudinal displacement of the transducer in test 1;

FIG. 6 is an elliptical vibration trace plot for the transducer in experiment 2;

FIG. 7 is a graph of the lateral displacement and the longitudinal displacement of the transducer in test 2;

FIG. 8 is an elliptical vibration trace plot for the transducer in experiment 3;

FIG. 9 is a graph of the lateral displacement and the longitudinal displacement of the transducer in experiment 3;

in the figure:

the device comprises a pre-tightening bolt 1, a rear cover plate 2, a coil 3, a vibration telescopic unit 4, a wedge-shaped block 5, a screw rod 6, an amplitude transformer 7, a lead wire 8, a magnetizer 9, a giant magnetostrictive rod 10 and a permanent magnet 11.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides a giant magnetostrictive window-shaped elliptical composite vibration transducer, which comprises a rear cover plate 2, a vibration telescopic unit 4, a wedge-shaped block 5 and an amplitude transformer 7 which are sequentially arranged from top to bottom; the rear cover plate 2, the vibration telescopic unit 4 and the wedge-shaped block 5 are fixed; the wedge-shaped block 5 is connected with the amplitude transformer 7, and the vibration in a single direction is converted into the elliptical compound vibration in two directions through the wedge-shaped block 5, and the frequency and the amplitude of the elliptical compound vibration are adjusted.

In the invention, the wedge-shaped block 5 comprises two inclined planes, and one inclined plane is contacted with the lower end surface of the vibration telescopic unit 4; the other inclined plane is contacted with the end surface of the amplitude transformer 7 and is fixed through the screw 6; the included angle between two inclined planes of the wedge-shaped block is 10-60 degrees.

In the invention, the vibration telescopic unit 4 comprises a giant magnetostrictive rod 10 and a coil 3 wound on the giant magnetostrictive rod 10; the rear cover plate 2, the vibration telescopic unit 4 and the wedge-shaped block 5 are fixed through a pretightening bolt 1. The two ends of the giant magnetostrictive rod 10 are sequentially provided with a permanent magnet 11 and a magnetizer 9 from inside to outside; the magnetizer 9 at the lower end of the giant magnetostrictive rod 10 is contacted with the inclined plane of the wedge-shaped block 5; the magnetizer 9 at the lower end of the giant magnetostrictive rod 10 is in contact with the back cover plate 2.

The transduction method of the giant magnetostrictive window-shaped elliptical composite vibration transducer provided by the invention is that when the transducer works, a high-frequency alternating current signal is applied to the vibration telescopic unit 4 to generate a high-frequency alternating magnetic field, the vibration telescopic unit 4 generates high-frequency telescopic vibration under the high-frequency alternating magnetic field, and the vibration in a single direction generated by the vibration telescopic unit 4 is converted into elliptical composite vibration in two directions through the wedge-shaped block 5 and transmitted to the amplitude transformer 7.

The specific transduction method is that an alternating magnetic field generated by an alternating current signal is applied to a coil 3 on a giant magnetostrictive rod 10, the giant magnetostrictive rod 10 generates single-direction vibration under the alternating magnetic field, the generated single-direction vibration is converted into elliptical composite vibration in two directions through a magnetizer 9 and a wedge-shaped block 5, the elliptical composite vibration is transmitted to an amplitude transformer 7, and the frequency and the amplitude of the elliptical composite vibration are adjusted through the included angle and the diameter of the wedge-shaped block 5. The diameter of the wedge-shaped block 5 is larger than the length of the magnetizer 9 and smaller than a quarter wavelength corresponding to the vibration frequency of the transducer. The length of the diameter of the wedge-shaped block 5 is 35-60 mm.