Drilling of additional sidetracks by poly-crystalline diamond cutter (PDC) bits

2018 ◽  
pp. 17-20
Author(s):  
R.M. Bogomolov ◽  
◽  
D.Yu. Serikov ◽  
A.M. Grinev ◽  
N.I. Dedov ◽  
...  
Keyword(s):  
Poly Crystalline Diamond

scholarly journals Machining of Iron-Carbon Alloys by the Use of Poly-Crystalline Diamond Cutting Inserts with Internal Cooling

2018 ◽  
Vol 2 (3) ◽  
pp. 57 ◽  
Author(s):  
Manuel Reiter ◽  
Jens Brier ◽  
Friedrich Bleicher
Keyword(s):  
Wear Behavior ◽  
Cutting Tools ◽  
Tool Material ◽  
Internal Cooling ◽  
Diamond Cutting ◽  
Diffusion Effects ◽  
Cutting Inserts ◽  
Abrasive Cutting ◽  
Poly Crystalline Diamond ◽  
Insight Into

Poly-crystalline diamond (PCD) is an extremely tough, synthetically produced cutting tool material, which offers outstanding capabilities concerning wear behavior in abrasive cutting environments. Currently, the primary application of PCD cutting tools is the machining of non-ferrous materials, as the diamond’s carbon high affinity towards iron causes diffusion effects while cutting steel with rising temperature. This effect significantly reduces tool life. To lower the occurring temperature of the cutting process, and therefore avoid the reaction of carbon and iron, a thermal functionalization of the cutting inserts has been investigated. The results give insight into making PCD cutting tools economically usable for the machining of iron-carbon materials.

Carbon - silicon heterojunction diodes formed by CH4/ Ar rf plasma thin film deposition on Si substrates

1989 ◽  
Vol 162 ◽  
Author(s):  
G. A. J. Amaratunga ◽  
W. I. Milne ◽  
A. Putnis ◽  
K. K. Chan ◽  
K. J. Clay ◽  
...  
Keyword(s):  
Breakdown Strength ◽  
Electrical Breakdown ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Rf Plasma ◽  
Type I ◽  
Si Substrates ◽  
Semiconducting Properties ◽  
Electrical Breakdown Strength ◽  
Poly Crystalline Diamond

ABSTRACTThin C films deposited from a CH4/Ar plasma on Si substrates kept at 20C are shown to be semiconducting. The semiconducting properties are associated with the poly-crystalline diamond grains present within the films. Diode type I-V characteristics observed from AVC/Si verticle structures are explained by the action of a C-Si heterojunction. A band gap of 2eV, a resistivity of 106Ω.cm and an electrical breakdown strength of 5.106 V/cm are estimated for the C.

Cutting Force Analysis of on-Machine Fabricated PCD Tool during Glass Micro-Grinding

2011 ◽  
Vol 264-265 ◽  
pp. 1085-1090 ◽  
Author(s):  
Asma Perveen ◽  
Muhammad Pervej Jahan ◽  
Yoke San Wong ◽  
Mustafizur Rahman
Keyword(s):  
Cutting Force ◽  
Cutting Forces ◽  
Material Removal ◽  
Depth Of Cut ◽  
Machined Surface ◽  
Hard Materials ◽  
Pcd Tool ◽  
Fluidic Devices ◽  
Micro Machine ◽  
Poly Crystalline Diamond

Brittle and hard materials are problematic to mechanically micro machine due to damage resulting from material removal by brittle fracture, cutting force-induced tool deflection or breakage and tool wear. As a result, the forces arising from the cutting process are important parameter for material removal. This study was undertaken to investigate the effect of cutting conditions on cutting forces and the machined surface during the glass micro grinding using on-machine fabricated (Poly Crystalline Diamond) PCD tool. Experimental results showed that an increase in depth of cut and feed rate can result in increase of cutting forces and surface roughness as well. Among the forces in 3 axes, force along feed direction is found to be larger, which played a major role in material removal. Finally, it is observed that PCD tool exhibits promising behaviour to machine brittle material like BK-7 glass for producing micro molds and micro fluidic devices, since it has better wear resistance, experiences less cutting forces and generates smooth surfaces with Ra value of as low as 12.79 nm.

Experimental and Mathematical Considerations on Roughness Resulting from "ATSi12CuMgNi" Turning Alloys Using Poly-Crystalline Diamond Tools

2013 ◽  
Vol 371 ◽  
pp. 328-332 ◽  
Author(s):  
Aurel Zapciu ◽  
Iulian Sorin Munteanu ◽  
Aurelian Zapciu
Keyword(s):  
Aluminum Alloys ◽  
Mathematical Modelling ◽  
Automotive Industry ◽  
Large Scale ◽  
Point Of View ◽  
Diamond Tools ◽  
Systemic Analysis ◽  
Water Pumps ◽  
Very High ◽  
Poly Crystalline Diamond

The importance of using silicon aluminum alloys - with composite structure, on large scale, in the production of vehicle parts (in automotive industry like: pistons, cylinder heads, cylinders, water pumps body, stirrups, etc.), is very high, when it comes to industrial purposes. One of the most used methods of processing by cutting with production tools with the working part of made of poly-crystalline diamond is turning, thus, systemic analysis is necessary to study the dynamics of the process. The paper presents results of experimental research regarding the roughness resulting in the process of turning "ATSi12CuMgNi" alloys using poly-crystalline diamond tools, in order to determine all the parameters involved in the mathematical modelling of roughness, the importance of this parameters from quantitative and intrinsic point of view, and the evaluation of resulted roughness based on experimental results, in order to improving the machinability of silicon aluminum alloys.

Basic Study on Micro V-Groove Cutting of Tungsten Carbide Using Diamond Tools

2012 ◽  
Vol 565 ◽  
pp. 517-522 ◽  
Author(s):  
Takayuki Kitajima ◽  
Shigeki Okuyama ◽  
Akinori Yui
Keyword(s):  
Tool Wear ◽  
Tungsten Carbide ◽  
Rake Angle ◽  
Basic Study ◽  
Diamond Tools ◽  
Diamond Crystals ◽  
Effective Rake Angle ◽  
The Relationship ◽  
Groove Cutting ◽  
Poly Crystalline Diamond

Micro V-groove cutting of cobalt-free tungsten carbide using two types of V-shaped diamond tools is performed using mist of zinc dialkyl-dithiophosphate (ZnDDP) as lubricant. The two types of tool tested are 1) mono-crystalline diamond and 2) poly-crystalline diamond made of approximately 30 nm-sized diamond crystals. The geometry of the V-groove-cutting process is theoretically investigated and the relationship between V-groove angle, original rake angle, and effective rake angle is clarified. Through the cutting experiments, the effects of diamond types and rake angle on tool-wear characteristics are explained. When rake angle is set at zero degrees, tool chipping frequently occurs for both types of diamond tools even when ZnDDP is supplied. However, when rake angle is set at -30 degrees for poly-crystalline diamond, tool wear is minimized.

Face Milling of Carbon Fiber Reinforced Plastic Using Poly Crystalline Diamond Tool

2014 ◽  
Vol 1017 ◽  
pp. 383-388 ◽  
Author(s):  
Jumpei Kusuyama ◽  
Akinori Yui ◽  
Takayuki Kitajima ◽  
Yosuke Itoh
Keyword(s):  
Carbon Fiber ◽  
High Strength ◽  
Face Milling ◽  
Hole Drilling ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Poly Crystalline Diamond

Carbon Fiber Reinforced Plastic (CFRP) is a high-strength and high-elastic-modulus composite material that is hardened by impregning carbon fiber with epoxy resin. Although, many sutdies of hole drilling of CFRP have been conducted, few sutdies of face milling of CFRP have been carried out. Face milling is necessary for surfaceing of aerospace parts, which is indispensable for airplane construction. Machining of CFRP is difficult because of the extreme tool wear and delamination that occur. The authors investigated face milling of CFRP using a newly developed Poly Crystalline Diamond (PCD) tool. The resultts show, that the cutting force and surface roughness are affected by the fiber orientation of the CFRP, and that delamination can easily occur in the outer layer of face-nilled CFRP.

An Investigation on Machining Behaviour of Metal Matrix Composites by Using PCD Inserts

2005 ◽  
Author(s):  
N. Muthu Krishnan ◽  
D. Vikram ◽  
S. Kaushik ◽  
K. Prahalada Rao
Keyword(s):  
Tool Wear ◽  
Metal Matrix ◽  
Material Removal ◽  
Wear Behavior ◽  
Removal Rate ◽  
Cutting Tools ◽  
Depth Of Cut ◽  
Matrix Composites ◽  
Worn Surface ◽  
Poly Crystalline Diamond

The present work has been undertaken to study the tool wear behavior of poly crystalline diamond (PCD) inserts during the machining of Al-SiC – MMC; Al-Si alloy containing 15%wt of SiC was used for machining and PCD inserts of three different grades were used as cutting tools. The main aim of this paper is to explore the feasibility of machining conditions by setting the spindle speed, depth of cut and thereby determining the cutting force, surface roughness, power consumed, material removal rate and tool wear. The worn surface of the insert was examined by Scanning electron microscope (SEM). The influence of cut was examined for the PCD inserts.

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