scholarly journals Wear characteristics of PCBN tools in the ultra-precision machining of stainless steel at low speeds

Wear ◽  
2003 ◽  
Vol 254 (3-4) ◽  
pp. 265-277 ◽  
Author(s):  
W.Y.H Liew ◽  
B.K.A Ngoi ◽  
Y.G Lu
Keyword(s):  
Stainless Steel ◽  
Precision Machining ◽  
Wear Characteristics ◽  
Ultra Precision ◽  
Low Speeds ◽  
Pcbn Tools

Binderless-cBN as Cutting Material for Ultra-Precision Machining of Stainless Steel

2014 ◽  
Vol 1018 ◽  
pp. 107-114 ◽  
Author(s):  
Julian Polte ◽  
Mitchel Polte ◽  
David Lorenz ◽  
Dirk Oberschmidt ◽  
Heinz Sturm ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Surface Quality ◽  
Wear Mechanisms ◽  
Machine Tools ◽  
Experimental Studies ◽  
High Potential ◽  
Precision Machining ◽  
Workpiece Material ◽  
Ultra Precision ◽  
Direct Cutting

The ultra–precision cutting of steel materials is possible but needs modifications of machine tools or the workpiece material. One approach of actual research is the development of cutting materials that gives the opportunity for direct cutting of surfaces with ultra–precision quality. Binderless–cBN is here one of the most promising materials. The paper shows results of experimental studies with binderless–cBN as cutting material while turning stainless steel. Various investigations were carried out to determine the wear mechanisms. Furthermore, measurements are shown regarding the surface quality. The achieved results show the high potential ofbinderless–cBN as cutting material for the machining of steel.

The Theoretical Analysis and Application of the Ultra-Precision Machining the End Surface of Stop Valve’s Valve Flap with the Diamond Facing Tool

2013 ◽  
Vol 652-654 ◽  
pp. 2113-2118
Author(s):  
Ji Hua Zhu ◽  
Xue Xia Liu ◽  
Xue Min Tian ◽  
Jian Fei Chen
Keyword(s):  
Stainless Steel ◽  
Theoretical Analysis ◽  
Cutting Parameters ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Quality Requirements ◽  
Machinery Factory ◽  
New Process ◽  
The Face ◽  
Ultra Precision

A new process was proposed. The disadvantage of of using brown alumina grinding wheel to grinding and lapping surface was studied in the analysis. The diamond facing tool was designed and manufactured with the solution of the key technique of the critical technical of single crystal diamond’s material selecting, grinding, welding. The face cutting parameters: “V”, “f” and “ap” were measured by experiment and academic analysis. Tt can fully meet the quality requirements of stainless steel valve flap’s surface used by one valve machinery factory; meanwhile the productivity was increased by a factor of 15, with overcoming the disadvatange of grinding and lapping valve flap’s surface.

Wear of Coated Carbide Tools in the Ultra-Precision Machining of Stainless Steel

2005 ◽  
Author(s):  
W. Y. H. Liew ◽  
X. Ding
Keyword(s):  
Stainless Steel ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Precision Machining ◽  
Mould Insert ◽  
Ultra Precision ◽  
Coated Carbide ◽  
Precision Machines ◽  
Coated Carbide Tools ◽  
Steel Mould

Ultra-precision machines are widely used to turn aspherical profiles on mould inserts for the injection moulding of optical lenses. During turning of a profile on a stainless steel mould insert, the cutting speed reduces significantly to 0 as the cutting tool is fed towards the center of the machined profile. This paper reports on experiments carried out to study the wear of uncoated, PVD-coated and CVD-coated carbide tools in the ultra-precision machining of STAVAX (modified AISI 420 stainless steel) at low speeds.

Ultra-Precision Machining of Stainless Steel and Nickel with Single Crystal 4H and 6H Boule SiC

2010 ◽  
Vol 645-648 ◽  
pp. 853-856 ◽  
Author(s):  
Wolfgang J. Choyke ◽  
B. D'Urso ◽  
Fei Yan ◽  
Robert P. Devaty
Keyword(s):  
Stainless Steel ◽  
Single Crystal ◽  
Cutting Tools ◽  
Precision Machining ◽  
Average Roughness ◽  
Flat Surfaces ◽  
Diamond Cutting Tools ◽  
Single Crystal Diamond ◽  
Single Crystal Sic ◽  
Ultra Precision

Ultra-precision machining is dominated by single-crystal diamond cutting tools, and is typically applied to a narrow range of materials, particularly aluminum and copper. Single-crystal SiC can be comparable to some diamonds in hardness and thermal conductivity, while potentially having superior chemical and thermal stability, yet it has not been explored as a cutting tool for ultra-precision machining. We made two cutting tools with single-crystal SiC, one with sharp corners and one with a large circular radius, and used them to cut flat surfaces on two materials, 316 stainless steel and nickel. These materials generally cause unacceptably rapid diamond tool wear. We report the average roughness of the resulting surfaces cut with single-crystal 4H and 6H SiC tools.

scholarly journals Performance of Uncoated and Coated Carbide Tools in the Ultra-Precision Machining of Stainless Steel

2004 ◽  
Vol 17 (4) ◽  
pp. 851-857 ◽  
Author(s):  
W.Y.H. Liew ◽  
Y.G. Lu ◽  
X. Ding ◽  
B.K.A. Ngoi ◽  
S. Yuan
Keyword(s):  
Stainless Steel ◽  
Precision Machining ◽  
Ultra Precision ◽  
Coated Carbide ◽  
Coated Carbide Tools

scholarly journals A Self-Established “Machining-Measurement-Evaluation” Integrated Platform for Taper Cutting Experiments and Applications

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 929
Author(s):  
Xudong Yang ◽  
Zexiao Li ◽  
Linlin Zhu ◽  
Yuchu Dong ◽  
Lei Liu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Precision Machining ◽  
Two Dimensional ◽  
Dimensional Image ◽  
Two Dimensional Image ◽  
Integrated Platform ◽  
Hard And Brittle Materials ◽  
Ultra Precision ◽  
Cutting Experiments

Taper-cutting experiments are important means of exploring the nano-cutting mechanisms of hard and brittle materials. Under current cutting conditions, the brittle-ductile transition depth (BDTD) of a material can be obtained through a taper-cutting experiment. However, taper-cutting experiments mostly rely on ultra-precision machining tools, which have a low efficiency and high cost, and it is thus difficult to realize in situ measurements. For taper-cut surfaces, three-dimensional microscopy and two-dimensional image calculation methods are generally used to obtain the BDTDs of materials, which have a great degree of subjectivity, leading to low accuracy. In this paper, an integrated system-processing platform is designed and established in order to realize the processing, measurement, and evaluation of taper-cutting experiments on hard and brittle materials. A spectral confocal sensor is introduced to assist in the assembly and adjustment of the workpiece. This system can directly perform taper-cutting experiments rather than using ultra-precision machining tools, and a small white light interference sensor is integrated for in situ measurement of the three-dimensional topography of the cutting surface. A method for the calculation of BDTD is proposed in order to accurately obtain the BDTDs of materials based on three-dimensional data that are supplemented by two-dimensional images. The results show that the cutting effects of the integrated platform on taper cutting have a strong agreement with the effects of ultra-precision machining tools, thus proving the stability and reliability of the integrated platform. The two-dimensional image measurement results show that the proposed measurement method is accurate and feasible. Finally, microstructure arrays were fabricated on the integrated platform as a typical case of a high-precision application.

scholarly journals An Investigation of the Cutting Strategy for the Machining of Polar Microstructures Used in Ultra-Precision Machining Optical Precision Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 755
Author(s):  
Chen-Yang Zhao ◽  
Chi-Fai Cheung ◽  
Wen-Peng Fu
Keyword(s):  
Precision Measurement ◽  
Detection Algorithm ◽  
Surface Generation ◽  
Precision Machining ◽  
Tool Geometry ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Ultra Precision ◽  
Transition Points ◽  
Cutting Strategy

In this paper, an investigation of cutting strategy is presented for the optimization of machining parameters in the ultra-precision machining of polar microstructures, which are used for optical precision measurement. The critical machining parameters affecting the surface generation and surface quality in the machining of polar microstructures are studied. Hence, the critical ranges of machining parameters have been determined through a series of cutting simulations, as well as cutting experiments. First of all, the influence of field of view (FOV) is investigated. After that, theoretical modeling of polar microstructures is built to generate the simulated surface topography of polar microstructures. A feature point detection algorithm is built for image processing of polar microstructures. Hence, an experimental investigation of the influence of cutting tool geometry, depth of cut, and groove spacing of polar microstructures was conducted. There are transition points from which the patterns of surface generation of polar microstructures vary with the machining parameters. The optimization of machining parameters and determination of the optimized cutting strategy are undertaken in the ultra-precision machining of polar microstructures.

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