Key Factors Affecting the Amplitude of a Composite Ultrasonic Wiredrawing Vibration System

2012 ◽  
Vol 157-158 ◽  
pp. 395-399 ◽  
Author(s):  
Xiao Biao Shan ◽  
Nai Ming Qi ◽  
Li Li Wang ◽  
Tao Xie
Keyword(s):  
Cross Section ◽  
Ultrasonic Vibration ◽  
Variable Cross Section ◽  
Experimental Result ◽  
Variable Cross ◽  
Vibration System ◽  
Key Factors ◽  
Element Analysis ◽  
Factors Affecting ◽  
The Finite Element Analysis

This paper studied the key factors affecting the amplitude of a composite ultrasonic wiredrawing vibration system, for designing a powerful ultrasonic vibration system. The finite element analysis (FEA) was performed. The results showed that the variable cross-section shapes of horns and the angles between the connection of both ends of the cross-section and the center line had great effects on the amplitude of an ultrasonic vibration system. In order to valid the theoretical result, the experiments were carried out on a composite ultrasonic vibration system. The experimental result demonstrated that the conical variable cross-section rods used in an ultrasonic vibration system produced large amplitude.

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.

Elastic-Plastic Finite Element Simulation of Bulge Forming Process Using a Variable Cross-Section Solid Bulging Mold

2011 ◽  
Vol 189-193 ◽  
pp. 4405-4408
Author(s):  
Ke Wang ◽  
Zhe Ying Wang ◽  
Xing Wei Sun
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Metal Flow ◽  
Three Dimensional ◽  
Variable Cross Section ◽  
Flow Mode ◽  
Variable Cross ◽  
Forming Process ◽  
Element Analysis ◽  
Screw Rotor

Bulge forming is a novel process aimed at common products including T-branches, cross branches and angle branches. But bulging forming has not applied for two-head abnormity-shaped hollow screw rotor reported in literature. Simulation of the bulging forming of two-head abnormity-shaped hollow screw rotor has not been reported. This paper presents a simulation of the bulge forming process of two-head abnormity-shaped hollow screw rotor using a variable cross-section solid bulging mold. Some conditions including the effect of friction, boundary conditions, contact conditions and the space motion, etc are presented. The mathematical model of three-dimensional finite element analysis has been established. The distribution of generalized plastic strain and general metal flow mode in cross section of two abnormity-shaped hollow screw rotor has been analyzed. It is an effective method for the analysis of other defects and the optimization of process parameters further.

Stability Analysis of Single-Pier Variable Cross-Section Box-Girder Continuous Bridge

2014 ◽  
Vol 989-994 ◽  
pp. 923-926
Author(s):  
Guan Sheng Yin ◽  
Jie Bai ◽  
Jun Jie Feng
Keyword(s):  
Cross Section ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Lateral Stability ◽  
Eccentric Load ◽  
Box Girder ◽  
Factors Affecting ◽  
Safety Coefficient ◽  
Future Design ◽  
Transverse Stability

On the basis of Umansky box-girder torsion theory, the software of ANSYS is applied to simulate related engineering model. In considering a variety of live load conditions, the lateral stability of multi-span single-pier variable cross-section box-girder under torsion eccentric load is analyzed. Analysis results reveal that under different working conditions, the factors affecting the transverse stability of the bridge and the proportion of the value on each, such as gravity, the span ratio and the distance between support are different; When the overload ratio is 2 times larger, the bridge stability safety coefficient decreases along the curve and changes rapidly. In the future design of this kind of bridge, the overall lateral stability should be paid much more attention. Some methods and suggestions about how to prevent the emergence of security and stability problems are put forward in the end.

The Simplication Algorithm and Characteristic Analysis of Variable Cross-Section Beam of Machining Center

2013 ◽  
Vol 319 ◽  
pp. 356-361
Author(s):  
Xiao Peng Yao ◽  
Guo Fu Yin ◽  
Hui Fang
Keyword(s):  
Cross Section ◽  
Machine Tools ◽  
Variable Cross Section ◽  
Arbitrary Cross Section ◽  
Variable Cross ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Contrast Analysis ◽  
Model Constraint ◽  
Relative Errors

According to the spatial arbitrary cross-section beam simplification redundancy and coupled problem of model constraint mutually relation, for the variable cross-section beam of 5-axis gantry machine tools, a new beam simplification algorithm and the average second inertia concept is created by structural mechanics theory. Under gravity and cutting load of beam, It applied simplification algorithm and finite element analysis software (Nastran) to study the static and dynamic characteristic comparatively, deformation relative errors are less than 5%. The modal analysis of beams get the order natural frequency and vibration mode, contrast analysis with experimental value, the relative errors are less than 9% each other. Through theoretical analysis and experimental data shows that the simplification algorithm is practicability and accuracy, it play a role in the key components of machine tools analytical characteristics and machine tools of performance prediction.

Optimal Design and Test of Ultrasonic Vibration System

2012 ◽  
Vol 226-228 ◽  
pp. 21-25 ◽  
Author(s):  
Xin Lei Miao ◽  
Yong Wei Zhu
Keyword(s):  
Finite Element ◽  
Ultrasonic Vibration ◽  
Optimization Design ◽  
Natural Vibration ◽  
Dynamic Performance ◽  
Vibration System ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Analysis Package ◽  
Structure Dimension

Ultrasonic vibration system is the chief component of USM machine tool. Whether products are precisely machined is lie on the performance of the system. To design good performance of ultrasonic vibration system, finite element method is used to analyse the dynamic performance of the system based on theoretic calculation. The dynamic performance of transformer and transformer with tool is analysed respectively, including natural vibration characteristic and harmonic characteristic. The result of FEA is compared with theoretic calculation. The parametric optimization design technique of the finite element analysis package ANSYS is applied to optimize the structure dimension of the piezoelectric transducer and transformer with tool. Then amplitude of the optimized system and the previous system is compared based on laser-CCD sensor for micro-displacement. The optimized system is more superior and has larger amplitude. Last some round holes are machined on kentanium YG8, monocrystalline silicon, PZT. And machining effect of single Micro-USM is got by the test.

Design and finite element analysis of a variable cross-section cutter ring

2021 ◽  
pp. 102423
Author(s):  
Jia-Li Zhao ◽  
Xian Yong Zhu ◽  
Zhen-Hua Hou ◽  
Chang Liu ◽  
Song Yang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Element Analysis

Effect of Structural Stiffness on the Microvibration Response of the Working Platform of a Microelectronic Plant

2011 ◽  
Vol 243-249 ◽  
pp. 355-361
Author(s):  
Wei Ning Yuan ◽  
Shang Wen Qu ◽  
Zi Xue Lei
Keyword(s):  
Damping Ratio ◽  
Shear Walls ◽  
Normal Operation ◽  
Structural Stiffness ◽  
Key Factors ◽  
Element Analysis ◽  
Displacement Effect ◽  
Factors Affecting ◽  
The Finite Element Analysis ◽  
Velocity Response

Microvibration is one of the key factors affecting the normal operation of a microelectronic plant. Such measures as to increase the stiffness or damping ratio to prevent microvibration are easy to implement and low in cost. By using the finite element analysis software Sap2000 to simulate the microvibration performance of the working platform of a typical microelectronic plant, this paper compared some of its microvibration response when there were shear walls with that when there were no shear walls, discussed efficiency of structural stiffness on its microvibration response. The results indicate through the provision of shear walls to increase the stiffness of working platform enlarge acceleration and velocity response of the structure, it can decrease displacement effect.

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