Ductile Mode Turning of Brittle Materials and its Practical Aspects

2013 ◽  
Vol 651 ◽  
pp. 350-354 ◽  
Author(s):  
Alokesh Pramanik ◽  
Animesh Basak
Keyword(s):  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Tool Life ◽  
Brittle Material ◽  
Laser Heating ◽  
Brittle Materials ◽  
Machining Time ◽  
Main Obstacle ◽  
Ductile Machining ◽  
Ductile Mode

This paper aims to investigate the mechanism of ductile machining of brittle material based on information available in the literature. It also explores the challenges associated with the ductile machining of brittle materials which stop the technology from being applied in practical fields. In addition, few factors that assist to improve productivity of ductile machining of brittle material have been discussed. It is found the higher tool wear is the main obstacle of this technology. The application ofmicro-laser heating,ultrasonic vibration and coolants improve the machining time and tool life significantly.

Ultraprecision Cutting of Glass BK7

2006 ◽  
Vol 315-316 ◽  
pp. 536-540 ◽  
Author(s):  
Ming Zhou ◽  
X.D. Liu ◽  
S.N. Huang
Keyword(s):  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Wear Mechanism ◽  
Optical Glass ◽  
Brittle Materials ◽  
Optical Quality ◽  
Diamond Cutting ◽  
Ductile Mode ◽  
Tool Wear Mechanism ◽  
Ductile Mode Cutting

The development of the capability to machine glass materials to optical quality is highly desirable. In this work, the deformation characteristics of brittle materials were analyzed by micro and nano indentations. Diamond cutting of optical glass BK7 was performed in order to investigate the tool wear mechanism in machining of brittle materials and the effect of tool vibration on material removal mechanism. The tool wear mechanism was discussed on the basis of the observation of wear zone. Ductile-mode cutting has easily been achieved with the application of ultrasonic vibration during cutting of glass. It was confirmed experimentally that the tool wear and surface finish were improved significantly by applying ultrasonic vibration to the cutting tool.

An Experimental Study on Diamond Cutting of Optical Glass

2008 ◽  
Vol 375-376 ◽  
pp. 211-215 ◽  
Author(s):  
Hang Zhao ◽  
Ming Zhou
Keyword(s):  
Experimental Study ◽  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Optical Glass ◽  
High Hardness ◽  
Optical Quality ◽  
Process Conditions ◽  
Machined Surface ◽  
Ductile Mode ◽  
Indentation Analysis

Optical glass is one of the most difficult-to-cut brittle materials due to its high brittleness and high hardness. In this work, an experimental study was conducted to diamond-cut glass SF6 in ductile mode. Nano-indentation analysis was performed for understanding the material deformation behavior in practical cutting process. The effect of process conditions, i.e. conventional turning and ultrasonic vibration assisted cutting, on the tool wear and surface quality was discussed based on the observations of the tool wear zone microstructure and the machined surface topography. The investigation presents the feasibility of achieving optical quality surfaces on glass with the application of ultrasonic vibration cutting technology. The tool life and surface finish were improved significantly by applying ultrasonic vibration to the cutting tool.

scholarly journals Simulation of the Ductile Machining Mode of Silicon

2021 ◽  
Author(s):  
Hagen Klippel ◽  
Stefan Süssmaier ◽  
Matthias Röthlin ◽  
Mohamadreza Afrasiabi ◽  
Uygar Pala ◽  
...  
Keyword(s):  
Brittle Material ◽  
Material Removal ◽  
Machining Process ◽  
Ductile Machining ◽  
Mesh Free ◽  
Ductile Mode ◽  
Single Grain ◽  
Diamond Wire Sawing ◽  
Material Removal Mode ◽  
Brittle Material Removal

Abstract Diamond wire sawing has been developed to reduce the cutting loss when cutting silicon wafers from ingots. The surface of silicon solar cells must be flawless in order to achieve the highest possible efficiency. However, thesurface is damaged during sawing. The extent of the damage depends primarily on the material removal mode. Undercertain conditions the generally brittle material can be machined in ductile mode, whereby considerably fewer cracksoccur in the surface than with brittle material removal. In the presented paper a numerical model is developed in orderto support the optimization of the machining process regarding the transition between ductile and brittle materialremoval. The simulations are performed with an GPUaccelerated in–house developed code using mesh-free methodswhich easily handle large deformations while classic methods like FEM would require intensive remeshing. Thesimulation results are compared with results obtained from single grain scratch experiments.

Prediction of Machining Dimension in Laser Heating and Ultrasonic Vibration Composite Assisted Cutting of Tungsten Carbide

2018 ◽  
Vol 17 (01) ◽  
pp. 35-45 ◽  
Author(s):  
Feng Jiao ◽  
Ying Niu ◽  
Ming-Jun Zhang
Keyword(s):  
Time Series ◽  
Tool Wear ◽  
Tungsten Carbide ◽  
Ultrasonic Vibration ◽  
Laser Heating ◽  
Time Series Model ◽  
Two Dimensional ◽  
Dimension Precision ◽  
Artificial Neural Network Ann ◽  
Ultrasonic Vibration Cutting

Dimension precision plays an important role in precision machining. The two-dimensional ultrasonic vibration cutting (TDUVC) method reduces cutting force and alleviates tool wear, meanwhile, laser assisted cutting (LAC) improves the material workability under high temperature. In this paper, laser heating and two-dimensional ultrasonic vibration were combined in cutting of tungsten carbide (YG10) to improve machining dimension precision. According to the experimental results, a prediction model of machining dimension was built based on time series model. The results show that the machining dimension precision is improved significantly in laser and ultrasonic composite assisted cutting (LUAC), and AR (2) and AR (12) of time series model predicts machining dimension with high precision (the relative error is less than 10%), and reflects tool wear state. Moreover, comparison with artificial neural network (ANN) also proves that the time series model is more suitable for the prediction of machining dimensional in LUAC.

PRODEC STAINLESS TYPE 316

Alloy Digest ◽  
1993 ◽  
Vol 42 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tool Life ◽  
Surface Finish ◽  
Laboratory Testing ◽  
Machining Time ◽  
Aisi Type

Abstract PRODEC STAINLESS TYPE 316 is a standardized grade in plate and bar with an improved machining capability over the conventional AISI Type 316. It is a product of extensive laboratory testing and application proven. Its improved machinability offers: shorter machining time; longer tool life; better surface finish; less distortion problems; more homogeneity in microstructures; and marginally increased resistance to corrosion. This datasheet provides information on composition and physical properties. It also includes information on machining. Filing Code: SS-549. Producer or source: Avesta Sheffield Inc.

PROJECT 70/PROJECT 7000 STAINLESS TYPE 303

Alloy Digest ◽  
1997 ◽  
Vol 46 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Tool Life ◽  
Stainless Steels ◽  
Heat Treating ◽  
Machining Time ◽  
Type Machine

Abstract Project 70 stainless type 303 and Project 7000 stainless type 303 are free-machining stainless steels of the austenitic chromium-nickel type. They offer significantly improved machinability and longer tool life. These steels are suited particularly for automatic bar-machine and Swiss-type machine operations where longer tool life results in more productive machining time. Applications include shafts, valve bodies, valves, valve trim, and fittings. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-409. Producer or source: Carpenter. Originally published June 1982, revised June 1997.

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