scholarly journals Prediction of machining deformation and reasonable design of gear blank for split straight bevel gear

2021 ◽  
Author(s):  
Bin Wang ◽  
Chenxiao Yan ◽  
Peiyao Feng ◽  
Shuaipu Wang ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Calculation Model ◽  
Bevel Gear ◽  
Geometric Parameters ◽  
Machining Process ◽  
Additional Stress ◽  
Element Analysis ◽  
Bending Deformation ◽  
Straight Bevel Gear ◽  
Machining Deformation ◽  
The Moment

Abstract The deformation of gear blank is serious in the machining process of the split straight bevel gear,considering the material and the design of gear blank, the relationship between the change of additional stress and bending deformation of gear blank is studied, and the calculation model of the internal additional stress and additional torque during the gear cutting is established.According to the moment-area method, the calculation formula of the bending deformation of gear blank is derived, and combined with the time-varying stiffness, the mathematical model of the gear blank deformation is obtained. The theoretical calculation, finite element analysis and experimental results are highly consistent.Based on the above research, the internal relationships between the machining deformation and the geometric parameters such as the thickness, diameter and gear module of the split gear blank is analyzed, and the reasonable design of the geometric parameters of the split gear blank and the reasonable dividing law of the gear blank are explored.

Tooth Surface Contact Stress Analysis of the Straight Bevel Gear Axial Practice

2013 ◽  
Vol 401-403 ◽  
pp. 345-349
Author(s):  
Jia Jia Lou ◽  
Xue Mei Cao ◽  
Ji Song Jiao
Keyword(s):  
Stress Analysis ◽  
Contact Stress ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Element Analysis ◽  
Surface Distribution ◽  
Straight Bevel Gear ◽  
Static Contact ◽  
Contact Models ◽  
Grid Nodes

The program of tooth surface and gear inside grid nodes is developed according to the tooth surface equation. Finite Element Analysis of the straight bevel gear axial practice model is established. Order flow contact models of the three teeth and contact pair of gears of the three teeth is developed by APDL language of ANSYS. The static contact stress analysis of axial practice is constructed. The static contact stress of tooth surface distribution and change rule is obtained by calculating. The result shows that axial practice pair of gears of have good meshing performance.

scholarly journals Residual Stress and Deformation Analysis in Machining Split Straight Bevel Gears

2021 ◽  
Vol 67 (3) ◽  
pp. 114-122
Author(s):  
Bin Wang ◽  
Chenxiao Yan ◽  
Jubo Li ◽  
Peiyao Feng ◽  
Shuaipu Wang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Internal Stress ◽  
Material Design ◽  
Bevel Gear ◽  
Machining Process ◽  
Deformation Analysis ◽  
Bevel Gears ◽  
Straight Bevel Gear ◽  
Deformation Law

In the machining of split straight bevel gears, the stiffness changes and internal stress are redistributed, which leads to serious deformation of the gear blank after machining. To rectify this problem, q finite element model is established by transforming the processing information of the gear blank into the finite element simulation calculation information, and the gear machining simulation of split straight bevel gear is carried out. Considering the material, design, and machining process of the gear blank, the characteristics and laws of internal stress variation during the gear machining are studied, and the internal mechanism and deformation law of split straight bevel gear are explored. Finally, the gear machining experiment, and the gear blank measurement are carried out. The results show that the deformation law of simulation is consistent with that of the experiment and the deformation characteristics of the split straight bevel gear are consistent with the change law of initial residual stress.

scholarly journals A self-adjusting stiffness center design for large stroke compliant XY nanomanipulators

2018 ◽  
Vol 9 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Zhiqing Liu ◽  
Zhen Zhang ◽  
Peng Yan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Geometric Parameters ◽  
Rotational Stiffness ◽  
Element Analysis ◽  
Redundant Constraint ◽  
Alternative Approach ◽  
Motion Stage ◽  
The Moment

Abstract. In the present paper, it is proposed a self-adjusting stiffness center (SASC) design for large stroke XY beam flexure-based mechanisms. An important feature of the SASC lies in it restricts the in-plane parasitic rotation by reducing the moment of force instead of increasing the rotational stiffness widely utilized in the literature. Specifically, it is shown that by leveraging on the varied stiffness of the parallelogram flexure, the stiffness center can be made stationary by appropriately setting the relevant geometric parameters, so that the parasitic rotation can be restricted. Furthermore, it is presented a millimeter stroke XY nanomanipulator with the SASC-based redundant constraint in a case study. Numerous finite element analysis (FEA) results demonstrate that the proposed design is not only capable of achieving 1.5 × 1.5 mm2 working range in a compact desktop size, but significantly reduces the in-plane moment applied to the motion stage. The proposed SASC-based design provides an alternative approach to reduce the parasitic rotation of large stroke XY beam flexure-based mechanisms.

Effect of Initial Residual Stress on Machining Deformation of a Casing Part

2020 ◽  
Vol 976 ◽  
pp. 139-144
Author(s):  
Bian Hong Li ◽  
Wen Bing Zhou ◽  
Hong Bin Deng ◽  
Han Jun Gao
Keyword(s):  
Residual Stress ◽  
Axial Direction ◽  
Tangential Direction ◽  
Machining Process ◽  
Equivalent Model ◽  
Element Analysis ◽  
Roundness Error ◽  
Initial Residual Stress ◽  
Machining Deformation ◽  
Axial Residual Stress

Initial residual stress of blank is the main cause for the workpiece machining deformation. Based on the simplified equivalent model and the finite element analysis method, the effects of initial residual stress in bidirectional, axial direction and tangential direction on the deformation of an aluminum alloy conical case were studied respectively. The deformations of case were judged by flatness and roundness error of the end face of the case. From the results, it can be seen that the influence of the initial axial residual stress on the roundness error of the end face is greater than that of the radial residual stress; among all the errors, the roundness error of the large end face is much larger than that of other errors. It is shown that the roundness error of the large end face and the initial axial residual stress of the workpiece are the most important issues to be controlled in actual machining process. This conclusion has certain guiding significance for practical application.

scholarly journals Method of Calculating the Compensation for Rectifying the Horizontal Displacement of Existing Tunnels by Grouting

2020 ◽  
Vol 11 (1) ◽  
pp. 40
Author(s):  
Yongjie Qi ◽  
Gang Wei ◽  
Feifan Feng ◽  
Jiaxuan Zhu
Keyword(s):  
Volume Expansion ◽  
Soil Layer ◽  
Horizontal Displacement ◽  
Soil Mass ◽  
Calculation Model ◽  
Additional Stress ◽  
Corrective Effect ◽  
Engineering Data ◽  
Subway Tunnels ◽  
Good Agreement

Sleeve valve pipe grouting, an effective method for reinforcing soil layers, is often employed to correct the deformation of subway tunnels. In order to study the effect of grouting on rectifying the displacement of existing tunnels, this paper proposes a mechanical model of the volume expansion of sleeve valve pipe grouting taking into consideration the volume expansion of the grouted soil mass. A formula for the additional stress on the soil layer caused by grouting was derived based on the principle of the mirror method. In addition, a formula for the horizontal displacement of a tunnel caused by grouting was developed through a calculation model of shearing dislocation and rigid body rotation. The results of the calculation method proposed herein were in good agreement with actual engineering data. In summary, enlarging the grouting volume within a reasonable range can effectively enhance the grouting corrective effect. Further, with an increase in the grouting distance, the influence of grouting gradually lessens. At a constant grouting length, setting the bottom of the grouting section at the same depth as the lower end of the tunnel can maximize the grouting corrective effect.

scholarly journals Computerized Generation of Asymmetric Straight Bevel Gear

2021 ◽  
Vol 1094 (1) ◽  
pp. 012084
Author(s):  
Adil Habeeb Hashim ◽  
Mohammad Qasim Abdullah
Keyword(s):  
Bevel Gear ◽  
Straight Bevel Gear

scholarly journals Multi-Stage Cold Forging Process for Manufacturing a High-Strength One-Body Input Shaft

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 532
Author(s):  
A Jo ◽  
Myeong Jeong ◽  
Sang Lee ◽  
Young Moon ◽  
Sun Hwang
Keyword(s):  
High Strength ◽  
Microstructural Characterization ◽  
Fatigue Tests ◽  
Machining Process ◽  
Cold Forging ◽  
Element Analysis ◽  
Forging Process ◽  
Input Shaft ◽  
Multi Stage ◽  
The One

A multi-stage cold forging process was developed and complemented with finite element analysis (FEA) to manufacture a high-strength one-body input shaft with a long length body and no separate parts. FEA showed that the one-body input shaft was manufactured without any defects or fractures. Experiments, such as tensile, hardness, torsion, and fatigue tests, and microstructural characterization, were performed to compare the properties of the input shaft produced by the proposed method with those produced using the machining process. The ultimate tensile strength showed a 50% increase and the torque showed a 100 Nm increase, confirming that the input shaft manufactured using the proposed process is superior to that processed using the machining process. Thus, this study provides a proof-of-concept for the design and development of a multi-stage cold forging process to manufacture a one-body input shaft with improved mechanical properties and material recovery rate.

The Finite Element Analysis of the Large-Scale Converter Transformer Valve Side of the Electric Field

2013 ◽  
Vol 325-326 ◽  
pp. 476-479 ◽  
Author(s):  
Lin Suo Zeng ◽  
Zhe Wu
Keyword(s):  
Finite Element ◽  
Electric Field ◽  
Large Scale ◽  
Calculation Model ◽  
Simulation Software ◽  
Field Calculation ◽  
Element Analysis ◽  
Ansys Simulation ◽  
The Finite Element Analysis ◽  
Electric Field Calculation

This article is based on finite element theory and use ANSYS simulation software to establish electric field calculation model of converter transformer for a ±800kV and make electric field calculation and analysis for valve winding. Converter transformer valve winding contour distribution of electric field have completed in the AC, DC and polarity reversal voltage.

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