Modelling and analysis of the effect of nonlinear time-varying contact deformation on flexible precision grinding process

2021 ◽  
Author(s):  
Lai Zou ◽  
Tingting Wang ◽  
Chao Wang ◽  
Zhaorui Li ◽  
Yuru Wu ◽  
...  
Keyword(s):  
Grinding Process ◽  
Time Varying ◽  
Contact Deformation ◽  
Precision Grinding

ANALYSIS OF WHEEL WEAR USING FORCE DATA IN SURFACE GRINDING

2003 ◽  
Vol 27 (3) ◽  
pp. 193-204 ◽  
Author(s):  
Andrew Warkentin ◽  
Robert Bauer
Keyword(s):  
Mild Steel ◽  
Surface Grinding ◽  
Grinding Process ◽  
Time Varying ◽  
Grinding Forces ◽  
Wheel Wear ◽  
Excessive Heat ◽  
Abrasive Grains ◽  
Different Depths ◽  
Force Data

Grinding involves many randomly shaped and distributed abrasive grains removing material from a workpiece. Wheel wear results when these grains dull, fracture or break away. As a result, grinding forces are time-varying. In order to automate and optimize the grinding process an understanding of how forces are generated and change during grinding is critical to avoid workpiece damage, surface finish deterioration, cracking, excessive heat generation, and excessive residue stresses. This paper builds upon the existing grinding literature by studying the relationships between wheel wear and grinding forces for different depths of cut when surface grinding mild steel with an aluminum oxide wheel.

Modeling of Micro-Positioning System Using Direct Mapping and Polynomial Fit for Precision Grinding Process Control

2007 ◽  
Vol 329 ◽  
pp. 791-796
Author(s):  
S. Tse ◽  
Y. Gao
Keyword(s):  
Process Control ◽  
Experimental Studies ◽  
Piezoelectric Constant ◽  
Grinding Process ◽  
Modeling Error ◽  
Precision Grinding ◽  
Positioning Systems ◽  
Direct Mapping ◽  
Polynomial Fit ◽  
Command Signals

For micro-positioning systems using piezoelectric actuators for precision grinding process control, sinusoidal command signals will be used and will give additional problems in comparison with the commonly used step signals due to the hysteresis effects, which require a good modeling approach. In order to avoid the discontinuity problem in obtaining the values of the piezoelectric constant, a new approach of direct mapping with polynomial fit is proposed. Theoretical and experimental studies are conducted and comparative studies are made. Compared with the single polynomial approach, the proposed method of direct mapping with polynomial fit is able to reduce the modeling error to 12.5%, which is 6.5% lower, and the problems in obtaining the values of the piezoelectric constant are avoided. The proposed approach is shown advantageous. Further studies are necessary to significantly reduce the modeling error.

Investigation into the Role of Cold Atmospheric Plasma on the Precision Grinding of RB-SiC Ceramic at Room Temperature

2021 ◽  
Author(s):  
Jiabin Xu ◽  
Xiaoshuang Rao ◽  
Xiaoyu Xu ◽  
Kechong Wang ◽  
Bao Guo ◽  
...  
Keyword(s):  
Surface Modification ◽  
Material Removal ◽  
Room Temperature ◽  
Atmospheric Plasma ◽  
Grinding Process ◽  
Plasma Oxidation ◽  
Precision Grinding ◽  
Cold Atmospheric Plasma ◽  
Sic Ceramic ◽  
Subsurface Material

Abstract RB-SiC ceramic is one of the most important and useful material as optical precision elements in many scientific research fields. In this paper, a novel cold atmospheric plasma (CAP), which is based on the precision grinding process in surface technology to modify at room temperature (RT) for grinding with a combination of plasma oxidation surface modification is proposed. To identify the performance of the proposed cold atmospheric plasma (CAP) method on the surface modification of RB-SiC ceramic, precision grinding test was conducted. To reveal the fundamental issue in the grinding of RB-SiC ceramic, numerical calculation and model analysis were conducted to investigate the effect of the composite process on grinding forces and the mechanism of subsurface material removal in the presence of plasma oxidation. As a result of the method included the kept constant during the precision grinding of the composite process self-adaption-grinding process to avoid the deviation caused by second grinding particle entry. As a summary, we provides a significant cold atmospheric plasma-precision grinding compound process toward the establishment of the basic theory by analyzing the mechanism of the simulated design and computation. The process and technical difficulties of RB-SiC ceramic and mechanism of subsurface material removal during precision grinding were be solved.

Structural Analysis of an Orbital Grinding System for Grinding Crankshafts for 5ton 5m Class Ship Engines

2014 ◽  
Vol 625 ◽  
pp. 253-257
Author(s):  
June Jang ◽  
Byoung Yeol Choi ◽  
Han Seok Bang ◽  
Woo Chun Choi ◽  
Soon Joo Cho
Keyword(s):  
Structural Analysis ◽  
High Precision ◽  
3D Modeling ◽  
Fem Simulation ◽  
Grinding Process ◽  
Precision Grinding ◽  
Commercial Software ◽  
Grinding System

An orbital grinding system is developed for manufacturing high precision crankshafts for 5ton-5m class ship engines. Structural analysis is carried out by 3D modeling and FEM simulation using a commercial software. The grinding system can conduct high precision grinding process for crankshafts of ship engines as well as normal small crankshafts.

Technological Possibilities of Low-Temperature Precision Grinding Process when Machining Hard and Brittle Materials

2002 ◽  
Vol 223 ◽  
pp. 149-156 ◽  
Author(s):  
B.I. Batiashvili ◽  
D.S. Butskhrikidze ◽  
G.A. Mamulashvili ◽  
R.S. Turmanidze ◽  
Karl Kromp ◽  
...  
Keyword(s):  
Low Temperature ◽  
Brittle Materials ◽  
Grinding Process ◽  
Precision Grinding ◽  
Hard And Brittle Materials
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