PVD Film Method for Measuring the Temperature Distribution in Cutting Tools

1996 ◽  
Vol 118 (1) ◽  
pp. 117-122 ◽  
Author(s):  
T. Kato ◽  
H. Fujii
Keyword(s):  
Temperature Distribution ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
Ceramic Tools ◽  
Different Temperatures ◽  
Cemented Carbide Tools ◽  
Pvd Film ◽  
Deposited Film ◽  
Film Method

A new method to measure the temperature distribution in cutting tools is reported. In this method, a thin PVD (physically vapor deposited) film deposited on a cutting tool is used as a thermal sensor. Various films of different materials are deposited to determine the location of a multiplicity of isotherms at different temperatures. Cemented carbide tools and alumina ceramic tools are used for tests. It is confirmed that the boundary between the melted film zone and the unmelted film zone shows the isotherm directly and clearly. The method is also found to be very sensitive and applicable to any tool material as well as to a very small area.

Forecasting Performance of Ceramic Cutting Tool

2017 ◽  
Vol 736 ◽  
pp. 86-90 ◽  
Author(s):  
Vyacheslav Maksarov ◽  
A. Khalimonenko
Keyword(s):  
Electrical Resistance ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
Ceramic Materials ◽  
Specific Electrical Resistance ◽  
Testing Methods ◽  
Microstructural Parameters ◽  
Forecasting Performance ◽  
Nondestructive Testing Methods

The article considers the problems of forecasting the performance of cutting tools equipped with replaceable ceramic cutting bits. It is proposed to forecast the operability of ceramic tools on the ground of dependence between its performance characteristics and the microstructural parameters of the tool material. It is proposed to determine the parameters of ceramic bits microstructure by a nondestructive testing methods based on measuring the specific electrical resistance of ceramic materials. As a result of the study we have undertaken, a relationship was detected between the performance and specific electrical resistance of ceramic cutting tools.

Experimental Research on Superlong Deep-Hole Drilling Processing Technology for Steel of 4145H Drill Collar

2011 ◽  
Vol 201-203 ◽  
pp. 2597-2600
Author(s):  
Zhan Feng Liu ◽  
Rui Liang Li
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
Cutting Parameters ◽  
Machining Process ◽  
Hole Drilling ◽  
Deep Hole ◽  
Actual Structure ◽  
Steel Processing ◽  
Drill Collar

Through the analysis for steel of 4145H drill collar, Research into the various factors of cutting, such as the cutting tool material, cutting-tool angle and cutting parameters, combined with the actual structure of the workpiece and the superlong deep-hole processing method for study. In the test, the machining process is analyzed, especially the process of boring and honing. The test result indicates that the trepanning process is stable and reliable to solve the superlong deep hole (Φ71mm×7500mm) of 4145H drill collar steel processing problems of production if the optimizing cutting method is appropriate and the cutting tools and the cutting parameters are rational.

Analysis of Tool Wear—Part I: Theoretical Models of Flank Wear

1969 ◽  
Vol 91 (3) ◽  
pp. 790-796 ◽  
Author(s):  
A. Bhattacharyya ◽  
I. Ham
Keyword(s):  
Tool Wear ◽  
Cutting Tool ◽  
Flank Wear ◽  
Cutting Tools ◽  
Tool Material ◽  
High Strength ◽  
Theoretical Models ◽  
Flank Surface ◽  
Form Stability ◽  
Sufficient Strength

Cutting tools of sufficient strength against failure by brittle fracture or loss of “form stability” through rise of interface temperatures, still continue to fail by a process of “wear,” which is loss of cutting tool material through gradual interaction between the work and the tool material. Such wear can take place either at the principal flank surface or at the top face of the cutting tool for roughing and semiroughing cuts. Wear may also occur at the auxiliary flank surface resulting in grooving wear during fine machining or machining of high strength materials. The causes for such wear processes include (i) mechanical interaction (abrasion or adhesion and transfer type), (ii) thermochemical interaction (diffusion or chemical reaction). As a part of this investigation on tool wear, two theoretical models have been proposed for explaining mechanical wear at the flank surface. These models explain the nature and characteristics of wear growth and the sensitiveness and dependence of interaction phenomena between the tool-work pair.

Transient Thermal Stresses in the Quarter-Plane and their Relation to the Thermal-Cracking of Cutting Tools

1974 ◽  
Vol 16 (5) ◽  
pp. 322-330
Author(s):  
P. F. Thomason
Keyword(s):  
Metal Cutting ◽  
Thermal Stresses ◽  
Cutting Tool ◽  
Crack Nucleation ◽  
Cutting Tools ◽  
Thermal Cracking ◽  
Quarter Plane ◽  
Metal Cutting Tool ◽  
Transient Thermal ◽  
Cemented Carbide Tools

The transient thermal stresses in an insulated quarter-plane, subject to an instantaneous heat source on a segment of the surface, are determined with the aid of the Green's function for a two-dimensional infinite space. Numerical results for the transient thermal stresses at the surfaces of the quarter-plane are superimposed on previous isothermal results for cutting-load stresses in a π/2 wedge, to provide a model for a metal-cutting tool in the transient stages of a cutting process. The results are related to the problem of the thermal-cracking of cutting tools, and mechanisms of crack nucleation and propagation are proposed for both ceramic and cemented-carbide tools.

Methods of Forecasting Wear Resistance of Cutting Tools Based on the Properties of their Materials

2014 ◽  
Vol 682 ◽  
pp. 491-494 ◽  
Author(s):  
Vladislav Bibik ◽  
Elena Petrova
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Chemical Properties ◽  
Tool Material ◽  
Composition Structure ◽  
Metal Cutting Tool ◽  
Physical And Chemical ◽  
Thermo Physical Properties

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.

Hardened Steel Turning by Means of Modern CBN Cutting Tools

2013 ◽  
Vol 581 ◽  
pp. 188-193 ◽  
Author(s):  
Łukasz Ślusarczyk ◽  
Grzegorz Struzikiewicz
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
Chip Morphology ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Cutting Depth ◽  
Cutting Rate ◽  
Steel Turning ◽  
The Impact

The paper presents an analysis of the impact of cutting parameters such as cutting rate, feed rate, cutting depth and cutting tool material grade for surface roughness, the components of the total cutting force and chip morphology. We analysed the process of rolling 145Cr steel with a hardness of 55HRC with Wiper type tools with different percentage of CBN. The results and conclusions were presented.

Some Factors Affecting Wear on Cemented Carbide Tools

1952 ◽  
Vol 166 (1) ◽  
pp. 64-74 ◽  
Author(s):  
E. M. Trent
Keyword(s):  
Temperature Distribution ◽  
Tungsten Carbide ◽  
Friction Surface ◽  
Tool Material ◽  
Cutting Edge ◽  
Cemented Carbide ◽  
Factors Affecting ◽  
Work Surface ◽  
High Speeds ◽  
Cemented Carbide Tools

Evidence has been obtained that, in extremely severe conditions of friction, fusion occurs at the surface of friction between cemented carbides and steel. It is shown that steel will fuse with tungsten carbide at a temperature between 1,300 and 1,325 deg. C. (2,372 and 2,417 deg. F.). A theory is put forward to account for the “cratering” wear on cemented carbide tools containing free tungsten carbide. According to this theory, a fused layer of an alloy between tungsten carbide and steel is formed at the friction surface and is carried away by the chip. Titanium-tungsten carbide does not fuse with steel so readily, and hence is worn away much less rapidly than tungsten carbide in steel-cutting at high speeds. Micro-examination of worn tool surfaces shows that the type of wear is consistent with this theory. The conditions existing at the tool-work surface are discussed and the type of temperature distribution in the tool near the cutting edge is estimated. It is shown that the temperature distribution near the cutting edge can control the extent of cratering, the “built-up” edge, and deformation of the tool. In the light of the theory, some of the basic properties required in a tool material are discussed.

Study on the Cutting Performance of Al2O3-TiC-TiN Ceramic Tool Materials

2016 ◽  
Vol 693 ◽  
pp. 1148-1154 ◽  
Author(s):  
Yu Huan Fei ◽  
Chuan Zhen Huang ◽  
Han Lian Liu ◽  
Bin Zou
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cutting Tools ◽  
Tool Material ◽  
Cutting Performance ◽  
Cutting Condition ◽  
The Novel ◽  
Ceramic Tools ◽  
Diffusion Wear ◽  
Hot Pressing Sintering

In this work, two kinds of Al2O3-TiC-TiN ceramic cutting tools (AC2U and AC2UN2) were developed by hot-pressing sintering techniques. The mechanical properties were measured and the cutting performance was investigated. The workpiece used in the cutting experiment was quenched carbon tool steel T10A, and the tool material for comparison was LT55. The wear resistance and the main wear patterns of the ceramic tools were analyzed at the high speed of 300m/min. The results indicated that the novel Al2O3-TiC-TiN ceramic cutting tools showed better cutting performance than LT55, and AC2UN2 was better suitable for machining quenched T10A. When the cutting condition was v=300m/min, f=0.1mm/r and ap=0.1mm, the adhesion wear and abrasive wear of the novel ceramic tools were slighter than those of LT55, the diffusion wear resistance of AC2U was better and the oxidation resistance of AC2UN2 was better.

Development & Application of Polycrystal Cubic Boron Nitride Cutting Tool Material

2008 ◽  
Vol 375-376 ◽  
pp. 168-171 ◽  
Author(s):  
Jing Ying Zhang ◽  
Qi Xun Yu ◽  
Si Qin Pang ◽  
Shu Suo Meng ◽  
Tian Shun Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Cutting Tool ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Ferrous Metal ◽  
Tool Material ◽  
Production Method ◽  
Rough Machining ◽  
Hardened Cast ◽  
Development Application

This article illustrates the production method and mechanical & physical properties of polycrystal cubic boron nitride (PCBN) cutting tool material. As shown by the turning machining of hardened steel, cold-hardened cast iron and composite materials, PCBN cutting tool is superior in cutting performance to cemented carbide and ceramics cutting tools. In recent years, with great improvement in production process and overall mechanical properties of PCBN cutting tool material, it can effectively make rough machining of ferrous metal. This article contributes to the popularization and application of this cutting tool.

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