Computerized generation and simulation of meshing of a novel crown gear coupling avoiding edge contact

During cylindrical grinding process, the geometric configuration and size of the edge contact area between the grinding wheel and workpiece have the heavy effects on the workpiece surface integrity. In consideration of the differences between the point grinding and the conventional high speed cylindrical grinding, the geometric and mathematic models of the edge contact area in point grinding were established. Based on the models, the numerical simulation for the edge contact area was performed. By means of the point grinding experiment, the effect mechanism of the edge contact area on the ground surface integrity was investigated. These will offer the applied theoretic foundations for optimizing the point grinding angles, depth of cut, wheel and workpiece speed, geometrical configuration and size of CBN wheel and some other grinding parameters in point grinding process.

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Geometrical design of skew conical involute gear drives in approximate line contact

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/09544062jmes1340 ◽

2009 ◽

Vol 223 (9) ◽

pp. 2201-2211 ◽

Cited By ~ 11

Author(s):

S H Wu ◽

S J Tsai

Keyword(s):

Power Transmission ◽

Design Approach ◽

Line Contact ◽

Contact Sensitivity ◽

Axis Ratio ◽

Edge Contact ◽

Involute Gear ◽

Surface Durability ◽

Gear Drives ◽

Conical Gear

A novel design for skew conical involute gear drives in approximate line contact is proposed. Such a drive has a contact ellipse with a large major-to-minor-axis ratio, which allows it to overcome the weakness of conical gear drives for application in power transmission. This gearing design approach is characterized by reduced edge contact sensitivity and increased surface durability. The edge contact sensitivity that can arise with this kind of gear drive due to assembly or manufacturing errors is evaluated by analysing the value of the shift of the line of action caused by such errors. The surface durability is evaluated by calculating the Hertz stress. Some guidelines are developed based on the analysis of the influence of the gearing parameters on the edge contact sensitivity and the surface durability made possible using this design approach for conical gear drives in the approximate line contact. The guidelines are summarized and, finally, a practical example is given to demonstrate the feasibility of the approximate line contact design.

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Dynamic test study on flexible transmission system of crown gear

2010 IEEE International Conference on Mechatronics and Automation ◽

10.1109/icma.2010.5589951 ◽

2010 ◽

Author(s):

Liang Liu ◽

Yuyi Zhai ◽

Shiliang Yang ◽

Wenjie Lu ◽

Yao Xie

Keyword(s):

Dynamic Test ◽

Transmission System ◽

Test Study ◽

Crown Gear

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Anomalously persistent p-type behavior of WSe2 field-effect transistors by oxidized edge-induced Fermi-level pinning

Journal of Materials Chemistry C ◽

10.1039/d1tc04148g ◽

2022 ◽

Author(s):

Tien Dat Ngo ◽

Min Sup Choi ◽

Myeongjin Lee ◽

Fida Ali ◽

Won Jong Yoo

Keyword(s):

Fermi Level ◽

Field Effect ◽

Field Effect Transistors ◽

High Mobility ◽

Two Dimensional ◽

Edge Contact ◽

Fermi Level Pinning ◽

P Type

A technique to form the edge contact in two-dimensional (2D) based field-effect transistors (FETs) has been intensively studied for the purpose of achieving high mobility and also recently overcoming the...

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