scholarly journals Estimation of Minimum Uncut Chip Thickness during Precision and Micro-Machining Processes of Various Materials—A Critical Review

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 59
Author(s):  
Szymon Wojciechowski
Keyword(s):  
Critical Review ◽  
Chip Thickness ◽  
Micro Machining ◽  
Machining Processes ◽  
Uncut Chip Thickness ◽  
Micro Cutting ◽  
Thickness Estimation ◽  
Minimum Uncut Chip Thickness ◽  
Ultra Precision

Evaluation of the phenomena characterizing the chip decohesion process during cutting is still a current problem in relation to precision, ultra-precision, and micro-machining processes of construction materials. The reliable estimation of minimum uncut chip thickness is an especially challenging task since it directly affects the machining process dynamics and formation of a surface topography. Therefore, in this work a critical review of the recent studies concerning the determination of minimum uncut chip thickness during precision, ultra-precision, and micro-cutting is presented. The first part of paper covers a characterization of the precision, ultra-precision, and micro-cutting processes. In the second part, the analytical, experimental, and numerical methods for minimum uncut chip thickness estimation are presented in detail. Finally, a summary of the research results for minimum uncut chip thickness estimation is presented, together with conclusions and a determination of further research directions.

An Assessment, Definition, and Determination of the Minimum Uncut Chip Thickness of Microcutting and Impact on Machining New Powder Metallurgy Nickel-Based Superalloys

2011 ◽  
Author(s):  
Z. Y. Shi ◽  
Z. Q. Liu ◽  
Y. B. Guo
Keyword(s):  
Orthogonal Cutting ◽  
Three Dimensional ◽  
Chip Thickness ◽  
Critical Value ◽  
Uncut Chip Thickness ◽  
Minimum Uncut Chip Thickness ◽  
Process Mechanics ◽  
Art Research ◽  
Future Work

The uncut chip thickness is comparable to the cutting edge radius in micromachining. If the uncut chip thickness is less than a critical value, there will be no chip formation. This critical value is termed as the minimum uncut chip thickness (MUCT). Although minimum uncut chip thickness has been well defined in orthogonal cutting, it is often poorly understood in practical complex turning and milling processes. This paper presents an analysis of the state-of-art research on minimum uncut chip thickness in precision micro-machining. The numerical and experimental methods to determine MUCT values and their effects on process mechanics and surface integrity in microcutting will be critically assessed in this paper. A set of definitions of minimum uncut chip thickness for three-dimensional turning and milling processes are presented. In addition, a detailed discussion on the characteristics of different methods to determine minimum uncut chip thickness and several unsolved problems are proposed for the future work.

Numerical Modeling of Minimum Uncut Chip Thickness for Micromachining With Different Rake Angle

2011 ◽  
Author(s):  
Z. Y. Shi ◽  
Z. Q. Liu
Keyword(s):  
Numerical Modeling ◽  
Cutting Tool ◽  
Chip Thickness ◽  
Rake Angle ◽  
Arbitrary Lagrangian Eulerian ◽  
Uncut Chip Thickness ◽  
Minimum Uncut Chip Thickness ◽  
Effective Rake Angle ◽  
The Relationship

In micromachining, when the undeformed chip thickness becomes comparable to the edge radius of the cutting tool, the effective rake angle becomes to be negative and has significant effect on the determination of the minimum uncut chip thickness. The determination of the minimum uncut chip thickness is essential in micro machining in order to achieve desired surface integrity and accuracy. In this paper, an Arbitrary Lagrangian Eulerian (ALE)-based numerical modeling is proposed to determine the minimum uncut chip thickness for Copper by changing the cutting tool’s nominal rake angle. According to the relationship between the minimum uncut chip thickness and the effective rake angle, a mathematical model that reflects the relationship between the effective rake angle and the nominal rake angle is established.

scholarly journals Methods of minimum uncut chip thickness estimation during cutting with defined geometry tools

Mechanik ◽  
2018 ◽  
Vol 91 (8-9) ◽  
pp. 664-666
Author(s):  
Szymon Wojciechowski
Keyword(s):  
Chip Thickness ◽  
Uncut Chip Thickness ◽  
Thickness Estimation ◽  
Minimum Uncut Chip Thickness ◽  
Orthogonal Turning

Methods of minimum uncut chip thickness estimation during cutting with defined geometry tools were presented. Approaches were divided into experimental, analytical, and numerical. It has been presented that applied methods concern mainly orthogonal turning, however only a few consider tools with rounded cutting edges.

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