A Material Removal Model for Nonconstant-contact Flexible Grinding

2021 ◽  
Author(s):  
Huan Ye ◽  
Zhitong Chen ◽  
Zhuoqun Xie ◽  
Shangbin Li ◽  
Shuai Su
Keyword(s):  
Material Removal ◽  
Model Parameters ◽  
Grinding Process ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Material Removal Model ◽  
Contact Situation ◽  
Equivalent Method ◽  
Removal Model ◽  
Novel Model

Abstract Contact calculation is of great importance in predicting the material removal (MR) of flexible grinding process (FGP). The contact is mostly considered approximately constant in the existing MR models, while the situations that contact varies a lot after FGP are ignored. Therefore, a novel model is proposed in this paper to take those situations into consideration. Firstly, the nonconstant-contact situation is introduced. Then an equivalent method is developed to convert the nonconstant-contact grinding process into the accumulation of several quasi-constant-contact grinding processes. Based on the equivalent method, a MR model is established, and the procedure to obtain the model parameters by the finite element analysis (FEA) is introduced. In the end, the equivalent method and the MR model are tested by a series experiments of different process parameters. Results show that the proposed MR model can predict the material removal effectively for the nonconstant-contact situations.

scholarly journals Tentative Investigations on Reducing the Edge Effects in Pre-Polishing the Optics

2020 ◽  
Vol 10 (15) ◽  
pp. 5286
Author(s):  
Xiaolong Ke ◽  
Lei Qiu ◽  
Chunjin Wang ◽  
Zhenzhong Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Edge Effect ◽  
Edge Effects ◽  
Material Removal ◽  
Processing Time ◽  
Grinding Process ◽  
Element Analysis ◽  
Edge Zone ◽  
The Finite Element Analysis

The material removal depth in the pre-polishing stage of the precision optics is usually tens of microns to remove the subsurface damage and grinding marks left by the previous grinding process. This processing of the upstand edge takes a large part of the time at this stage. The purpose of this paper is to develop a method that can reduce the edge effect and largely shorten the processing time of the pre-polishing stage adopting the semirigid (SR) bonnet. The generation of the edge effect is presented based on the finite element analysis of the contact pressure at the edge zone firstly. Then, some experimentations on the edge effect are conducted, and the results proved that the SR bonnet tool can overhang the workpiece edge in the pre-polishing stage to reduce the width and height of the upstand edge to largely shorten the subsequent processing time of it. In addition, there exists a perfect overhang ratio, which generates the upstand edge with the smallest width and height, with no damage to the bonnet tool in the meantime. In addition, one combination of the pre-polishing parameters is concluded according to this method, which can be safely adopted in practical process.

A MATERIAL REMOVAL MODEL FOR ROBOTIC BELT GRINDING PROCESS

2014 ◽  
Vol 18 (1) ◽  
pp. 15-30 ◽  
Author(s):  
Shuihua Wu ◽  
Kazem Kazerounian ◽  
Zhongxue Gan ◽  
Yunquan Sun
Keyword(s):  
Material Removal ◽  
Grinding Process ◽  
Belt Grinding ◽  
Material Removal Model ◽  
Robotic Belt Grinding ◽  
Removal Model

A Mechanistic Model of Material Removal in Magnetorheological Finishing (MRF)

2007 ◽  
Vol 359-360 ◽  
pp. 384-388
Author(s):  
Feng Jun Chen ◽  
Shao Hui Yin ◽  
Jian Wu Yu ◽  
Hitoshi Ohmori ◽  
Wei Min Lin ◽  
...  
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Reynolds Equation ◽  
Removal Rate ◽  
Mechanistic Model ◽  
Magnetorheological Fluid ◽  
Magnetorheological Finishing ◽  
Material Removal Model ◽  
Removal Model ◽  
The Magnetic Field

According to the sharp rheological characteristics of magnetorheological fluid in the magnetic field, the principle and mechanism of magnetorheological finishing is analyzed. Based on the Preston equation, the Reynolds equation and its boundary conditions, the two-dimensional material removal model is built and simulated. Furthermore, a series of MRF experiments are carried out, and the influence of the immersed depth and material kinds on material removal rate are clarified respectively. The experimental results are compared with the modeling results of material removal rate to confirm the mechanistic model validity.

Development of a New Plate Polishing Technique with an Instantaneous Tiny-Grinding Wheel Cluster Based on Magnetorheological Effect

2008 ◽  
Vol 53-54 ◽  
pp. 155-160 ◽  
Author(s):  
Qiu Sheng Yan ◽  
Ai Jun Tang ◽  
Jia Bin Lu ◽  
Wei Qiang Gao
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Grinding Wheel ◽  
Abrasive Particles ◽  
Magnetorheological Effect ◽  
Material Removal Model ◽  
Mr Effect ◽  
Removal Model

A new plate polishing technique with an instantaneous tiny-grinding wheel cluster based on the magnetorheological (MR) effect is presented in this paper, and some experiments were conducted to prove its effectiveness and applicability. Under certain experimental condition, the material removal rate was improved by a factor of 20.84% as compared with the conventional polishing methods with dissociative abrasive particles, while the surface roughness of the workpiece was not obviously increased. Furthermore, the composite of the MR fluid was optimized to obtain the best polishing performance. On the basis of the experimental results, the material removal model of the new plate polishing technique was presented.

The Research and Development on the Material Removal Mechanism of the Ultrasonic Cutting

2014 ◽  
Vol 1027 ◽  
pp. 40-43
Author(s):  
Yan Yan Lou ◽  
Yan Zhang ◽  
Ying Gao ◽  
Jia Chen Zhang ◽  
Yan Zhou Sun
Keyword(s):  
Material Removal ◽  
Development Trend ◽  
Ultrasonic Machining ◽  
Removal Mechanism ◽  
Rotary Ultrasonic Machining ◽  
Material Removal Mechanism ◽  
Material Removal Model ◽  
The Development Trend ◽  
Removal Model ◽  
Ultrasonic Cutting

Ultrasonic machining is an important part of modern processing technology which is adapt to all kinds of hard brittle materials processing. This paper reviews the latest progress of the material removal mechanism on one-dimensional ultrasonic machining, two-dimensional ultrasonic machining and rotary ultrasonic machining, and expounds the development trend of establishing the material removal model of the ultrasonic machining.

CHEMICAL MECHANICAL POLISHING AND ITS MECHANISM ON YTTERBIUM-DOPED MIXED SESQUIOXIDES (Yb:LuScO3)

2020 ◽  
pp. 2050036
Author(s):  
YUANYUAN FANG ◽  
HONGBO HE ◽  
LUNZHE WU ◽  
ZHE WANG ◽  
AIHUAN DUN ◽  
...  
Keyword(s):  
Chemical Mechanical Polishing ◽  
Material Removal ◽  
Mechanical Polishing ◽  
Scanning Probe ◽  
Basic Material ◽  
Atomic Step ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Material Removal Model ◽  
Removal Model

In this paper, Yb:LuScO3 crystal was processed by chemical mechanical polishing (CMP), and the surface roughness of 0.18[Formula: see text]nm was obtained. The atomic step structures of these sesquioxide crystals are successfully characterized by AFM scanning probe technology. Through several CMP experiments, the basic material removal mechanism of a ytterbium-doped LuScO3 crystal during CMP is studied. Based on the findings, a material removal model is established. The results of this study provide ideas for the study of CMP, crystal growth and epitaxy.

Development of Simulation Technology for 5-Axis Machines – Verification of Material Removal Model and Collision Avoidance –

2007 ◽  
Vol 1 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Masaaki Kanamaru ◽  
◽  
Norio Sakai ◽  
Akinobu Goto ◽  
Tomoya Hida ◽  
...  
Keyword(s):  
Collision Avoidance ◽  
Material Removal ◽  
Simulation Software ◽  
Simulation Technology ◽  
Application Technology ◽  
Material Removal Model ◽  
Removal Model ◽  
Over 40 Years

The 5-axis machine has now been in existence for over 40 years. Its original applications, once use limited to areas such as aerospace, have dramatically expanded to fields ranging from automobiles to the molding industry as new versions of the machine such as multitasking appeared. Its application technology continues to lag behind progress with the 5-axis machine, however, and problems remain in practical use. To resolve these issues, we have developed simulation software called G-Navi using our machining experience. We focus on the simulation of material removal and machine movement and discuss the effectiveness of solid simulation. We analyze the elements required for simulation and discuss projected issues.

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