Investigation on Deformation of the Flex-Gear and Optimization Design of Compound Curve Cam Wave Generator with Spiral

The deformation shape and mechanical property of flex-gear greatly affect the meshing accuracy and service life of harmonic drive, and the stress wave generator plays a decisive role in the deformation shape and mechanical properties of the flexible gear. The investigation on deformation of the flex-gear around the major axis is developed with comparative analysis with three kinds of traditional and commonly used wave generators. Based on the influence of the deformation around the major axis on meshing accuracy and service life, the eccentric arc cam wave generator improved by transition curve for controlling the deformation shape and reducing the deformation stress is developed. Considering the achievable flexibility of spiral with smooth curvature change rate, the contour of the compound curve cam wave generator with arc and spiral is proposed. The deformation of the flex-gear under the influence of this compound curve cam and the standard elliptic cam is further comparative analyzed. The conclusion shows that this compound curve cam can indeed reduce the deformation stress in the meshing area by increasing the meshing width, and correct deformation shape can also be gained by shape control on the whole circumference of the flex-gear’s neutral layer.

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Fatigue Analysis of Mobile Maintenance Platform Based on Ansys Workbench

MATEC Web of Conferences ◽

10.1051/matecconf/201817503048 ◽

2018 ◽

Vol 175 ◽

pp. 03048

Author(s):

Yongliang Yuan

Keyword(s):

Fatigue Life ◽

Optimization Design ◽

Strength Analysis ◽

Stress And Strain ◽

Large Space ◽

Damage Theory ◽

Simulation Results ◽

Cumulative Fatigue Damage ◽

Deformation Stress ◽

Ansys Workbench

In order to investigate the performance of the mobile maintenance platform, Ansys Workbench was used to analyze the strength analysis of the mobile maintenance platform. The deformation, stress, and strain were obtained. The fatigue module was used to analyze the fatigue of the mobile maintenance platform and the fatigue life based on the cumulative fatigue damage theory. The simulation results show that the strength of the mobile maintenance platform is sufficient, and its lifetime is as high as 19.8 years. The mobile maintenance platform has a large space for optimization and this paper provides a basis for future structural optimization design.

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Structure Optimization Design of Vane Steering Pump

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.496-500.904 ◽

2014 ◽

Vol 496-500 ◽

pp. 904-907

Author(s):

Lian Fu Yang

Keyword(s):

Optimization Design ◽

Structure Optimization ◽

Low Noise ◽

Transition Curve ◽

Hydraulic Power ◽

Power Steering ◽

Fitting Method ◽

Noise Impact ◽

Curve Fitting Method ◽

Hydraulic Power Steering

How to reduce or eliminate the noise of the vane steering pump is a key problem to use hydraulic power steering car to solve. After a lot of experiments and demonstration, the methods of adopting correct transition curve, and a large circular arc method, adopting low noise impact curve of eight times optimization design, and the advanced stator curve fitting method, are to be good solutions to the problem of the vane steering pump noise.

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Analysis of Shape Control Factors for the Overall Optimization Design of High-Rise Frame Shear Wall Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.1226 ◽

2013 ◽

Vol 423-426 ◽

pp. 1226-1229

Author(s):

Ting Yu Mei ◽

Lang Wu

Keyword(s):

Structural Optimization ◽

Shape Control ◽

Optimization Design ◽

Shear Wall ◽

Wall Structure ◽

Width Ratio ◽

High Rise ◽

Control Factors ◽

Length Width ◽

Building Plane

From the basic theory of structural optimization design and shape control factors, the characteristics and control requirements for control factors of high-rise frame shear wall structure optimization have been introduced in this paper. The research and analysis showed that: the structure system and building height, length-width ratio of building plane, and the vertical height-width ratio play an important role on structural optimization.

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Characteristic Analysis on Heavy Hydrostatic Bearing of DVT500 Vertical Lathe

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.151.121 ◽

2012 ◽

Vol 151 ◽

pp. 121-125 ◽

Cited By ~ 1

Author(s):

Xi Bing Li ◽

Xian Feng Du ◽

Shi Gang Wang ◽

Dong Sheng Li ◽

Yue Qiang Yu

Keyword(s):

Temperature Field ◽

Product Quality ◽

Rotational Speed ◽

Optimization Design ◽

Pressure Field ◽

Fluid Pressure ◽

Decisive Role ◽

Characteristic Analysis ◽

Hydrostatic Bearing ◽

Finite Element Software

With increasing demands for product quality, and the performance of assembly equipment plays a decisive role for product quality, national experts and scholars conduct in-depth research on the performance of the assembly equipment. In this paper, a research simulation on hydrostatic bearing performance of heavy-duty vertical lathes DVT(digital vertical tool) 500 is carried out by using finite element software FLUENT to simulate the fluid pressure field and temperature field distribution of sector oil recess at different work platform rotational speed. The law of these field distributions is also obtained. The results show that: the rotational speed of the work platform has a greater impact on pressure field and temperature field of gap fluid flow. Numerical results can reflect the true hydrostatic bearing fluid movement, the actual simulation results provide a theoretical basis for optimization design of the Engineering hydrostatic bearing oil cavity.

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Deformation of Flexspline under Transmission Force in Harmonic Drive

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.3536 ◽

2010 ◽

Vol 97-101 ◽

pp. 3536-3539 ◽

Cited By ~ 3

Author(s):

Xiao Xia Chen ◽

Shu Zhong Lin ◽

Jing Zhong Xing

Keyword(s):

Elastic Deformation ◽

Shell Element ◽

Beam Element ◽

Tangential Displacement ◽

Harmonic Drive ◽

Ansys Software ◽

Neutral Layer ◽

Experimental Distribution ◽

Wave Generator ◽

Tangential Forces

Method to investigate the elastic deformation of a flexspline in harmonic driver was developed under assembly force from wave generator and transmission force. Shell element and tapered beam element were applied to model the flexspline cone and the teeth on the flexspline respectively. Forced displacement of the flexspline in assembly state was imposed by contact analysis between the flexspline and wave generator. According to experimental distribution of tangential forces in transmission state, applying forces at the teeth tips on the flexspline in mesh state, deformation distribution under transmission torque loading was obtained. Simulations of assembly state and transmission state were realized in ANSYS software. In three sections of tooth ring vertical to the axis, the deformation distributions of the flexspline under specified displacement in assembly state were compared with the theory results. Deformation between tip of tooth and neutral layer in assembly state and in transmission state were compared respectively. The deformation results agreed well with the theory results in assembly state, while difference was found in tangential displacement on tooth tips in transmission state, which may influence mesh property evidently under transmission loading.

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Tooth Position and Deformation of Flexspline Assembled with Cam in Harmonic Drive Based on Force Analysis

Chinese Journal of Mechanical Engineering ◽

10.1186/s10033-021-00621-z ◽

2021 ◽

Vol 34 (1) ◽

Author(s):

Yunpeng Yao ◽

Xiaoxia Chen ◽

Jingzhong Xing ◽

Liteng Shi ◽

Yuqi Wang

Keyword(s):

Finite Element ◽

Geometric Constraints ◽

Geometric Condition ◽

Finite Element Models ◽

Force Analysis ◽

Neutral Layer ◽

Tooth Position ◽

Equilibrium Relationship ◽

Wave Generator ◽

Cam Profile

AbstractDeformation of the flexspline is the basis of analyzing tooth trajectory and designing tooth profile. Considering the tooth influence on the position of equivalent neutral layer, a piecewise method for calculating the deformation of flexspline assembled with a cam wave generator is presented in this paper. Firstly, a mechanic model of a ring of uniform thickness in contact with a rigid cam is established. The displacements of the ring inside and outside an unknown wrapping angle are determined by the geometric constraints of the cam profile and the equilibrium relationship, respectively. Meanwhile, the wrapping angle is solved according to the boundary conditions. The assembly forces are derived to investigate the circumferential elongation and strain. Then, considering the tooth effects on the neutral layer of flexspline, the tooth is positioned on the equivalent neutral layer, which is the non-elongation layer within one gear pitch but offset from the geometric mid-layer. The equivalent neutral layer is positioned by the empirical formula of the offset ratio, which is summarized by the orthogonal simulation on finite element models of racks. Finally, finite element models of a ring-shaped and a cup-shaped flexspline assembled with elliptical cam are established to verify the effectiveness and accuracy of the piecewise method. The results show that, compared with the geometric method, the tooth positioning deviation calculated by the piecewise method can be reduced by about 70% with a more accurate deformation description from the geometric condition and mechanic condition inside and outside the wrapping angle.

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Design and Analysis of Cam Wave Generator Based on Free Deformation in Non-Working Area of the Flexspline

Applied Sciences ◽

10.3390/app11136049 ◽

2021 ◽

Vol 11 (13) ◽

pp. 6049

Author(s):

Shuyan Wang ◽

Dongliang Li ◽

Shiteng Mao ◽

Bingkui Chen

Keyword(s):

Maximum Stress ◽

Ring Structure ◽

Deformation Model ◽

Sample Design ◽

Deflection Curve ◽

Wave Generator ◽

Wrap Angle ◽

Deformation Stress ◽

The Mathematical Model

Deformation stress of a flexspline under the action of a wave generator directly affects the service life of the flexspline and meshing quality of meshing pair. This study proposed a new deformation model for a flexspline, which incorporates forced deformation in the working area and free deformation in the non-working area, keeping the deformation shape unchanged during rotating. Based on this assumption of a deformation model, the mathematical model is further established, and the design approach of a cam wave generator is developed with the deflection curve of the ring structure. Then, a sample design with a double eccentric arc cam wave generator based on this deformation model is developed and analyzed in FEM. The results show that the deformation stress of the flexspline can be improved by relaxing the forced deformation in the non-working area, and the selected deformation shape can also remain unchanged during rotating. Moreover, the stress distribution and the maximum stress value could be improved with the variation of the combination coefficient, especially for the wrap angle.

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Optimization Design on the Processing Technic of Shot Blasting Machine Fender Apron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.503-504.1150 ◽

2012 ◽

Vol 503-504 ◽

pp. 1150-1153

Author(s):

Xue Zheng Wang ◽

Xiao Rui Song

Keyword(s):

Service Life ◽

Optimization Design ◽

Processing Technology ◽

Shot Blasting ◽

Actual Production ◽

Actual Use

According to the use, design and research of shot blasting machine equipment for years, combined with the company's actual production, the processing technology of fender has been optimized is the wearing part of shot blasting machine in the casting room, the service life of fender have more than doubled in the original ones by the actual use proof, greatly reducing the replacement frequency of fender for the company to save a lot of money.

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Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach

Energies ◽

10.3390/en14072010 ◽

2021 ◽

Vol 14 (7) ◽

pp. 2010

Author(s):

Chun-Yu Hsiao ◽

Chin-Hsiang Lai ◽

Zhu-Xuan Zheng ◽

Guan-Yu Li

Keyword(s):

Permanent Magnet ◽

Optimization Design ◽

Structural Reliability ◽

High Efficiency ◽

Design Parameters ◽

Prototype Model ◽

Optimized Design ◽

Outer Length ◽

Element Analysis ◽

Wave Generator

In this paper, the design and performance analysis of a high-efficiency permanent-magnet synchronous wave generator (PSWG) are presented. A systematic approach for the design of the outer rotor was proposed as a prototype model. The magnetic field, magnetic circuit characteristics, electrical characteristics of the generator, and optimal design parameters such as the pole–arc ratio and shoe outer length were determined using the Taguchi method, finite-element analysis (FEA) software, and rotor skewing techniques. The proposed six series and six parallel-connection winding configurations can provide an evenly distributed current for practical applications. A PSWG was designed and fabricated according to the proposed methodology. According to the experimental results by implementing the optimized design, the efficiencies of the proposed PSWG which used 3.6 Ω load at 300 rpm is 86.32% and the efficiency error between simulation and experiment is less than 1.8%. It verifies the feasibility of the proposed method to PSWG and the structural reliability optimization design.

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