scholarly journals Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow

2020 ◽  
Vol 66 (6) ◽  
pp. 358-374
Author(s):  
Junye Li ◽  
Lixiong Wang ◽  
Hengfu Zhang ◽  
Jinglei Hu ◽  
Xinming Zhang ◽  
...  
Keyword(s):  
Surface Quality ◽  
Incident Angle ◽  
Precision Machining ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Order Variable ◽  
Solid Liquid ◽  
Fifth Order

The solid-liquid two-phase abrasive flow precision machining technology is widely used in aerospace, precision machinery, the automotive industry and other fields, and is an advanced manufacturing technology that effectively improves the inner surface quality of workpieces. In this paper, the fifth-order variable-diameter pipe parts are researched. By discussing the collision between the abrasive particles and the wall surface, it is revealed that the material removal of the workpiece is caused by plastic deformation, and the mechanism of precision machining of the abrasive flow is clarified. Through numerical analysis and experimental research, it is found that the incident angle can affect the precision machining quality of the abrasive flow. When the inlet velocity of the abrasive flow is 45 m/s and the incident angle is 15°, the fifth-order variable-diameter pipe can obtain the best surface quality. Abrasive flow machining improves the surface quality of small holes better than that of large holes. To obtain uniform surface quality, it is necessary to use two-way machining to perform abrasive flow machining. The surface texture of the fifth-order variable-diameter pipe workpiece after precision machining by abrasive flow becomes clear and smooth, and the surface quality is significantly improved. The research results can provide theoretical guidance and technical support for the popularization and application of solid-liquid two-phase abrasive flow precision machining technology, with significant academic value and application value.

scholarly journals Numerical simulation analysis of four-stage variable diameter pipe for solid–liquid two-phase abrasive flow

2020 ◽  
Vol 2020 (14) ◽  
pp. 992-1000
Author(s):  
Guosong Liu ◽  
Junye Li ◽  
Xinpeng Wang ◽  
Xinming Zhang ◽  
Jinglei Hu
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Solid Liquid

scholarly journals Numerical analysis of solid liquid two phase abrasive flow polishing process for three stage variable diameter pipe

2018 ◽  
Vol 18 ◽  
pp. 189-193
Author(s):  
Ji Kun Hou ◽  
Jun Ye Li ◽  
Xiang Zang ◽  
Bin Yu Wang ◽  
Xin Ming Zhang ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Polishing Process ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Solid Liquid ◽  
Abrasive Flow Polishing

scholarly journals Numerical simulation analysis of four-step variable-diameter pipe by solid-liquid two-phase grinding

2017 ◽  
Vol 15 ◽  
pp. 119-123 ◽  
Author(s):  
Xin Ming Zhang ◽  
Jun Ye Li ◽  
Jing Lei Hu ◽  
Wen Qing Meng ◽  
Xiang Zang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Solid Liquid

scholarly journals Optimisation design and analysis of variable-diameter pipe parameters for solid–liquid two-phase abrasive flow processing

2020 ◽  
Vol 2020 (14) ◽  
pp. 985-991
Author(s):  
Junye Li ◽  
Xinpeng Wang ◽  
Jinglei Hu ◽  
Jingran Zhang ◽  
Guangfeng Shi ◽  
...  
Keyword(s):  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Solid Liquid

A Study on Surface Quality of GaN with CMP Polishing Process

2011 ◽  
Vol 291-294 ◽  
pp. 1764-1767
Author(s):  
Wei Li ◽  
Ming Ming Ma ◽  
Bin Hu
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Gallium Nitride ◽  
Surface Quality ◽  
Chemical Reaction ◽  
Experimental Result ◽  
Precision Machining ◽  
Polishing Process

This paper introduced a polishing process for planarization of gallium nitride (GaN) wafer by polishing slurry that is made up by the chemical reaction with H2O2 solution and iron. Some different polishing parameters in the polishing process has been analyzed, which affect the surface quality of wafers, such as slurry particle size, polishing times, polishing slurry etc., and trying to improve the polishing process by optimization of the polishing parameters. The experimental result showed that this polishing method has an effect on the surface quality of GaN wafers, finally, the efficient and precision machining with surface roughness of GaN wafers of Ra0.81 nm has been gained by the CMP polishing process.

Study on Parameters of Slurry Pipeline Transportation Technology in Grade

2014 ◽  
Vol 687-691 ◽  
pp. 556-559
Author(s):  
Guang Yue Pu ◽  
Yong Xia Bu ◽  
Chun Lei Pan ◽  
Hong Wei Liu
Keyword(s):  
Iron Ore ◽  
Hydraulic Characteristics ◽  
Pipeline Transportation ◽  
Two Phase ◽  
Mining Areas ◽  
Turbulent Transition ◽  
Solid Liquid ◽  
Minimum Operating ◽  
Iron Ore Concentrate

In generally, there are multiple factories. According to mining areas, it supplies different quality iron ore concentrate. And according to the unique requirements of owners, different grades concentrate cannot be confused. Therefore, the grade of slurry pipeline transportation is needed to be used. When in the study of grade transmission, we must focus on Hydraulic characteristics of solid-liquid two-phase for different quality of iron ore concentrate. Slurry concentration and Critical velocity of flow is especially important. Research shows that the deposition rate of laminar or turbulent transition velocity is higher than the occasion when the slurry has concentration, so the minimum operating speed is controlled by sedimentation; the concentration lower limit is 62%. If the concentration is over 68%, the yield stress of slurry will increase, and the pipeline pressure will drop, which is very sensitive to slight changes in concentration. Therefore, the solid weight concentration range is 62% to 68%,as the selection range of design.

The Confined Chord Error Algorithm for High Precision Machining Parametric Surface

2011 ◽  
Vol 201-203 ◽  
pp. 2334-2337 ◽  
Author(s):  
Zhi Qiang Zhang ◽  
Wen Jin Wang ◽  
Zhao Jian ◽  
Tai Yong Wang
Keyword(s):  
Surface Quality ◽  
High Precision ◽  
Order Derivative ◽  
Precision Machining ◽  
Interpolation Algorithm ◽  
Arc Length ◽  
Parametric Surface ◽  
Chord Error ◽  
First Order

The part’s surface quality of NC machining is influenced by the chord error greatly. The confined chord error algorithm for machining complex parametric surface is proposed for controlling the chord error. The arc length error is utilized to control the chord error of the interpolated point indirectly. The arc length error of interpolated point is computed by trapezia expressions, the coordinate and the first order derivative of interpolated point is computed by the interpolation algorithm. The computed error of confined chord error algorithm is discussed and the simulation indicate that the destined precision of the chord error can be satisfied by this algorithm.

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