scholarly journals Laser micro-nano texturing of a polycrystalline ultra-hard cutting tool to improve wear behaviour

2019 ◽  
Author(s):  
Manuela Pacella ◽  
Amir Badiee ◽  
Priyanka Ghosh
Keyword(s):  
Cutting Tool ◽  
Wear Behaviour ◽  
Hard Cutting

Hard Nano-Crystalline Coatings for Cutting Tools

2007 ◽  
Vol 567-568 ◽  
pp. 185-188 ◽  
Author(s):  
Miroslav Piska
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Dry Cutting ◽  
Nano Crystalline ◽  
The Right ◽  
Machining Productivity ◽  
Hard Cutting ◽  
Cutting Tool Materials

Modern trends in metal cutting, high speed/feed machining, dry cutting and hard cutting set more demanding characteristics for cutting tool materials. The exposed parts of the cutting edges must be protected against the severe loading conditions and wear. The most significant coatings methods for cutting tools are PVD and CVD/MTCVD today. The choice of the right substrate or the right protective coating in the specific machining operation can have serious impact on machining productivity and economy. In many cases the deposition of the cutting tool with a hard coating increases considerably its cutting performance and tool life. The coating protects the tool against abrasion, adhesion, diffusion, formation of comb cracks and other wear phenomena.

Analysis of Forces and Temperatures in Conventional and Ultrasonically-Assisted Cutting of Bone

2011 ◽  
Vol 223 ◽  
pp. 247-254 ◽  
Author(s):  
Khurshid Alam ◽  
Abdul Ghafoor ◽  
Vadim V. Silberschmidt
Keyword(s):  
Finite Element ◽  
Quantitative Analysis ◽  
Thermal Damage ◽  
Cutting Tool ◽  
Finite Element Simulations ◽  
Cutting Process ◽  
Bone Necrosis ◽  
Surgical Tools ◽  
Penetration Force ◽  
Hard Cutting

Bone cutting is a frequently used procedure in orthopaedic and neuro surgeries. Current research on bone cutting is concerned with the efforts to decrease the forces generated during cutting the bone as well as temperature to avoid mechanical and thermal damage (bone necrosis) induced by surgical tools. The paper presents results of finite-element simulations of conventional cutting (CC) and ultrasonically-assisted cutting (UAC) of bone in order to understand thermomechanics of the process. The study was aimed at investigating the levels of tool-penetration force and temperatures induced in the bone when a hard cutting tool penetrates into it in both types of cutting. The models allow the quantitative analysis of forces and temperatures produced during the cutting process. The use of UAC reduces the tool penetration force and temperature in the cutting region

scholarly journals Effect of Built-Up Edge Formation on Residual Stresses Induced by Dry Cutting of Normalized Steel

2014 ◽  
Vol 996 ◽  
pp. 603-608
Author(s):  
Johannes Kümmel ◽  
Jens Gibmeier ◽  
Volker Schulze ◽  
Alexander Wanner
Keyword(s):  
Surface Layer ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Wear Behaviour ◽  
Dry Cutting ◽  
Workpiece Material ◽  
Workpiece Surface

The tool and workpiece surface layer states of the tribosystem uncoated WC-Co cutting tools vs. normalised SAE 1045 workpiece material are studied in detail for a dry metal cutting process. Within the system the cutting parameters (cutting speed, feed rate, cutting depth) determine the wear state of the cutting tool and the resulting surface layer state (residual stress) in the workpiece. As the built-up edge can be used as a possible wear protecting layer [1] the influence of built-up edge and wear behaviour of the cutting tool was examined with respect to the workpiece surface layer state for knowledge based metal cutting processing. Small compressive stresses (-60-80 MPa) are induced in the surface layer, that are nearly homogeneous for the highest built-up edge, which lead to the lowest tool wear in combination with lowest cutting temperature.

Fabrication, Wear and Performance of Ceramic Cutting Tools

2006 ◽  
Vol 45 ◽  
pp. 1776-1785 ◽  
Author(s):  
Jef Vleugels
Keyword(s):  
High Speed ◽  
Cutting Tool ◽  
Elevated Temperatures ◽  
Complex Geometry ◽  
Cutting Tools ◽  
Wear Behaviour ◽  
Chemical Compatibility ◽  
Workpiece Material ◽  
Tool Materials ◽  
And Performance

The ceramic cutting tool requirements for metal machining are reviewed, taking into account the trends in industry towards dry high-speed cutting and the need for tools with complex geometry. The emphasis will be on bulk materials rather than on coatings and most attention will be devoted to machining of iron-based alloys (steels). In the development of new tool materials, special attention should be given to the chemical matching of tool and workpiece material at elevated temperatures. The chemical compatibility of the tool-workpiece combination can be investigated by means of static interaction couples at elevated temperatures, which have been exposed for times long enough to be able to characterise the interaction layer. Complementary to the experimental investigation, the chemical compatibility of tool and workpiece materials can be predicted from thermodynamic equilibrium solubility calculations of tool materials in a selected workpiece material. Taking into account the mechanical properties needed, new ZrO2-based composites were defined based on the thermodynamically estimated chemical stability. The selection, development and proof testing of the new ZrO2-based composites is highlighted and their wear behaviour and performance in high speed dry turning of construction steel is compared with that of state-of-the-art cutting tool materials.

Ultrasonic-Vibration Hard Cutting Force Analysis with the Finite Element Method

2010 ◽  
Vol 455 ◽  
pp. 360-364 ◽  
Author(s):  
Jing Lin Tong ◽  
Yan Yan Yan ◽  
Bo Zhao
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Cutting Forces ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Element Model ◽  
Advanced Technology ◽  
Hard Cutting

Ultrasonic-vibration hard cutting (UVHC) is a advanced technology, where high- frequency vibration is superimposed on the movement of the cutting tool. Compared to conventional turning (CT), this technique allows significant improvements in processing hard-to-cut materials, by producing a noticeable decrease in cutting forces and a superior surface finish. The paper presents a finite-element model of both CT and UVHC. Stresses produced in workpiece and cutting forces acting on the cutting tool in UVHC are studied, and the influence of cutting parameters, such as cutting speed and cutting depth on cutting force are investigated.

Analysis of a Tool System with a Four Axes Flexible Fixture

2010 ◽  
Vol 154-155 ◽  
pp. 1348-1355 ◽  
Author(s):  
Hung Ying Huang ◽  
Kuang Hua Fuh ◽  
Jung Shu Wu
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Processing Parameters ◽  
Systematic Design ◽  
Workpiece Surface ◽  
The Third ◽  
Cutting Processes ◽  
Cutting Experiments ◽  
Hard Cutting ◽  
Grinding And Polishing

This study is to develop a tool system, which is formed by a series of procedures, modifications, and assemblies, and to learn how processing characteristics are affected and what various processing parameters are. According to the cutting tool compressibility and clamping devices of rigidity and flexibility, three distinct combinations are as follows, that is (1) rigid clamping devices with hard cutting tools, (2) flexibile clamping devices with hard cutting tools, and (3) rigid clamping devices with soft cutting tools. The first are generally cutting processes, while the second are polishing processes and the third produce milling wipe or grinding and polishing compound processes. The cutting part is quite different and may cause different accuracy and removing rate. The mixture processes, such as turn-burnishing, milling-burnishing and grind-polishing, are existed. If certain flexible clamping devices with hard cutting tools are formed, the most suited to this process will be practical benefits. Considering the flexible cutting tools of clamping devices are less systematically designed, this study would mainly focus on the establishment of a systematic design, and actual cutting to explore its applications. In order to take into account the characteristics of flexibility and reduction of the retardation when connected, meanwhile, to meet not only the fixture complexity and availability (being easy) to manufacturing, but also to fit the strength and processing requirements, the systematic design is to create a tool system. After some cutting experiments have been conducted, the results proved that different degrees of flexibility on the workpiece surface would lead to different degrees of accuracy.

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