Research on Ultrasonic Vibration Combined with Grinding Machining and its Application in Processing Brittle Hard Materials

2010 ◽  
Vol 447-448 ◽  
pp. 223-227
Author(s):  
Yong Jun Zhang ◽  
Yong Jun Tang ◽  
Xiao Kang Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Ultrasonic Vibration ◽  
Vibration System ◽  
Optimal Dimension ◽  
Frequency Tracking ◽  
Hard Materials ◽  
Compact Size ◽  
Driving Circuit

A system of ultrasonic combined with grinding has been designed, and one novel connective method of straight screw combined with taper surface has been applied in spindle, so compact size and high revolving accuracy can be achieved. Modal analysis of ultrasonic vibration system has been implemented by FEM (Finite Element Method), and its optimal dimension has been calculated to find out optimal vibration estate. Full-bridge converter has been applied in driving circuit of ultrasonic vibrator, and auto-frequency tracking has been designed in order that ultrasonic vibration works on resonant or quasi-resonant frequency. Finally, machining experiments have been fulfilled about ultrasonic combined with grinding, and its machining effect has been distinctly improved comparing ordinary grinding machining.

The Key Techniques of Novel Miniaturized Ultrasonic Motor and its Application in Micro-EDM

2008 ◽  
Vol 375-376 ◽  
pp. 77-81
Author(s):  
Yong Jun Tang ◽  
Zhen Long Wang ◽  
Zhong Ning Guo ◽  
Yong Jun Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Ultrasonic Motor ◽  
Micro Edm ◽  
Frequency Tracking ◽  
Electro Discharge Machining ◽  
Compact Size ◽  
Narrow Space ◽  
Key Techniques

In order to operate in narrow space, a novel miniaturized EDM (Electro Discharge Machining) mechanism has been developed. A prototype of miniaturized EDM device based on ultrasonic motor (UM) has been developed, which has its advantage of compact size (70×40×50 mm). The differential driving electrode has been presented, and coaxial forced vibration of electrode is benefit for the evacuation of debris, so it helps to achieve stable and efficient machining. Driving principle of ultrasonic motor is analyzed, and simulation using Finite Element Method (FEM) is accomplished. The auto-frequency tracking has been carried out, in order that the motor work on resonant or quasi-resonant frequency. Finally, EDM experiment has been finished, and holes with figures of circleΦ85μm and Y-typed have been machined.

scholarly journals Design and fabrication of a microelectromechanical system resonator based on two orthogonal silicon beams with integrated mirror for monitoring in-plane magnetic field

2019 ◽  
Vol 11 (7) ◽  
pp. 168781401985368 ◽  
Author(s):  
Jesús Acevedo-Mijangos ◽  
Antonio Ramírez-Treviño ◽  
Daniel A May-Arrioja ◽  
Patrick LiKamWa ◽  
Héctor Vázquez-Leal ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Microelectromechanical Systems ◽  
Analytical Models ◽  
Complex Signal ◽  
Bending Vibration ◽  
Element Method ◽  
Silicon Beams

We present a resonant magnetic field sensor based on microelectromechanical systems technology with optical detection. The sensor has single resonator composed of two orthogonal silicon beams (600 µm × 26 µm × 2 µm) with an integrated mirror (50 µm × 34 µm × 0.11 µm) and gold tracks (16 µm × 0.11 µm). The resonator is fabricated using silicon-on-insulator wafer in a simple bulk micromachining process. The sensor has easy performance that allows its oscillation in the first bending vibration mode through the Lorentz force for monitoring in-plane magnetic field. Analytical models are developed to predict first bending resonant frequency, quality factor, and displacements of the resonator. In addition, finite element method models are obtained to estimate the resonator performance. The results of the proposed analytical models agree well with those of the finite element method models. For alternating electrical current of 30 mA, the sensor has a theoretical linear response, a first bending resonant frequency of 43.8 kHz, a sensitivity of 46.1 µm T−1, and a power consumption close to 54 mW. The experimental resonant frequency of the sensor is 53 kHz. The proposed sensor could be used for monitoring in-plane magnetic field without a complex signal conditioning system.

Resonant Pavement Breaker Vibration System Design and Simulation

2013 ◽  
Vol 850-851 ◽  
pp. 266-269
Author(s):  
Song He Zhu ◽  
Bo Yang ◽  
Xian Xiao Hou ◽  
Guo Sheng Lv ◽  
Ming He
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
System Design ◽  
Virtual Prototype ◽  
Concrete Pavement ◽  
Vibration Characteristics ◽  
System Model ◽  
Vibration System ◽  
Cement Concrete ◽  
Cement Concrete Pavement

This paper is about the vibration system of cement concrete pavement resonant breaker design and simulation. Finished the design and simulation of vibration system model and got the vibration characteristics and its parameters in detail by using virtual prototype technology and finite element method.

Numeric Analysis for Resonant Frequency of Rotating Blade

2009 ◽  
Vol 16-19 ◽  
pp. 1365-1369
Author(s):  
Di Zhao ◽  
Ke Qin Ding ◽  
Xin Chun Shang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Free Vibration ◽  
Resonant Frequency ◽  
Room Temperature ◽  
Vibration Characteristics ◽  
Resonance Analysis ◽  
Working Temperature ◽  
Rotating Blade ◽  
Dynamic Frequency

The paper implements numeric computation to analyze free vibration characteristics of rotating blade by the means of finite element method. The effects of rotate speed and temperature on the resonant frequency of blades are considered. The static frequency and the dynamic frequency under working speed for the room temperature and working temperature are calculated, and the various modes are obtained. The resonance analysis is given by Campbell graph in which shows the distribution of resonant points for resonant frequency and rotate speed under the different excitation.

Optimization Dressing Method of Amplitude Transformer Based on Finite Element

2013 ◽  
Vol 278-280 ◽  
pp. 315-318
Author(s):  
Ming Li Zhao ◽  
Bo Zhao ◽  
Yu Qing Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Structural Parameters ◽  
Low Cost ◽  
Dressing Method ◽  
Finite Element Software ◽  
System Vibration ◽  
Vibration Performance ◽  
Element Method

The node position of amplitude transformer was determined by the finite element method, and the flange was designed at the nod position for conveniently installation. By the finite element software, the amplitude transformer with flange was optimized and dressed, and its structural parameters were determined. During the actual manufacturing process, it was used impedance analyzer to test its vibration performance, the testing results show that this system vibration performance is good, its resonant frequency is 34.771kHz, anti-resonant frequency is 35.008kHz. The above-mentioned results are very much coincided with the system natural frequency of 34.893kHz which is drew by finite element method. Compared to the traditional dressing this method has many advantages such as convenience, green, environmental protection, low cost and others.

A High Efficient Variable Cross-Section Compound Ultrasonic Wiredrawing Vibration System

2012 ◽  
Vol 157-158 ◽  
pp. 1689-1694 ◽  
Author(s):  
Xiao Biao Shan ◽  
Nai Ming Qi ◽  
Li Li Wang ◽  
Tao Xie
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Ultrasonic Vibration ◽  
Maximum Amplitude ◽  
Variable Cross Section ◽  
Difficult Problem ◽  
Experimental Result ◽  
Variable Cross ◽  
Vibration System ◽  
High Efficient

To solve the technical difficult problem of difficult-to-draw materials, this work presented a composite ultrasonic vibration system with variable cross-section rods. The four-terminal network method and the finite element method were used to design the conical, the exponential and the catenary transducers. The finite element results of show that the oval trajectory can effectively improve the friction effect between the wire and the tool head. The experimental result showed that the maximum amplitude was about 60 μm. It was 3 times of that in our previous work. These results demonstrated the design of the composite ultrasonic vibration system was feasible.

Modelling of vibratory harvest with finite element method for trellis plantations

2015 ◽  
Vol 230 (9) ◽  
pp. 1479-1485
Author(s):  
László Fenyvesi ◽  
Attila Csatár ◽  
Dániel Fenyvesi
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Vibration System ◽  
Damping Properties ◽  
Green Plants ◽  
The Real ◽  
Element Method

The trellis supports of plants significantly affect their mechanical properties. Because trellises are usually used in grape plantations, their mechanical properties were measured in these systems. Vibrational grape harvesting was simulated using a finite element method. The major component of the vibration system is primarily represented by an elastic wire, and the green plants act as a mass with damping properties. The harvester ‘excitation’ was assumed to be sinusoidal with defined parameters. The real acceleration was measured during operation. The measured and calculated results correlated well. The process of detaching the crops can be determined using the calculated tearing force. This method helps to determine the dimensions of the trellis system and characterise the harvester’s operation.

Experimental Research on the Vibration Characteristics of Flexural Vibration Disk

2010 ◽  
Vol 97-101 ◽  
pp. 2558-2561
Author(s):  
Lin Zhu ◽  
Ji Yun Li
Keyword(s):  
Resonant Frequency ◽  
Ultrasonic Vibration ◽  
Reference Value ◽  
Flexural Vibration ◽  
Structure Design ◽  
Vibration Characteristics ◽  
Deep Hole ◽  
Vibration System ◽  
Maximal Amplitude ◽  
Threaded Connection

The vibration characteristics of flexural vibration disk in ultrasonic vibration system are studied through experiments. The results show that the resonant frequency of flexural vibration disk reduces with the reducing of its thickness and the resonant frequency increases with the reducing of its diameter. When designing the ultrasonic vibration system, because the transformer horn and the flexural vibration disk are designedly integrated, the defects caused by the way of threaded connection can be avoided. It is found that flexural vibration is dominating in the disk with some reflected ultrasonic through experiments, at the same time, there exist amplifying characteristics in the vibration of the disk and the maximal amplitude can reach 18 μm. The corresponding results provide certain reference value for the structure design of ultrasonic vibration system and the application in ultrasonic vibration deep-hole honing.

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