Development of Polycrystalline Diamond Tungsten Carbide Combination Circular Saw and Comparison of Tool Wear

2021 ◽  
Vol 20 (9) ◽  
pp. 48-56
Keyword(s):  
Tool Wear ◽  
Tungsten Carbide ◽  
Polycrystalline Diamond ◽  
Circular Saw

Influence of Tungsten-Carbide and Cobalt on Tool Wear in Cutting of Cemented Carbides with Polycrystalline Diamond Tool

2013 ◽  
Vol 7 (4) ◽  
pp. 433-438 ◽  
Author(s):  
Junsuke Fujiwara ◽  
◽  
Keisuke Wakao ◽  
Takeshi Miyamoto ◽  
Keyword(s):  
Particle Size ◽  
Tool Wear ◽  
Tungsten Carbide ◽  
Diamond Tool ◽  
Polycrystalline Diamond ◽  
Cemented Carbides ◽  
Large Particles

The influence of the tungsten-carbide (WC) particle size and Co contents of cemented carbides on polycrystalline diamond tool wear during turning was investigated experimentally. The main results obtained were as follows. (1) Tool wear increased with increasing Co content. (2) It is important to cut off the binder between the WC particles and the Co. (3) Cemented carbides containing small WC particles are more effective than cemented carbides containing large particles.

Precision Cutting of Structured Ceramic Molds with Micro PCD Milling Tool

2011 ◽  
Vol 5 (3) ◽  
pp. 277-282 ◽  
Author(s):  
Hirofumi Suzuki ◽  
◽  
Tatsuya Furuki ◽  
Mutsumi Okada ◽  
Katsuji Fujii ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Tungsten Carbide ◽  
Polycrystalline Diamond ◽  
Micro Milling ◽  
Grinding Wheels ◽  
Form Accuracy ◽  
Structured Surfaces ◽  
Milling Tool ◽  
Milling Tools

Micro milling tools made of PolyCrystalline Diamond (PCD) have been developed to machine ceramic micro dies and molds. Cutting edges are ground with diamond wheels. PCD milling tool wear is evaluated by cutting binder-less tungsten carbide spherical molds and machining structured surfaces for trial. Results of experiments clarified that PCD milling tool life is over 10 times that of resinoid diamond grinding wheels, and that form accuracy was 0.1 µm-0.3 µm P-V and surface roughness was 10 nm Rz.

Thermally induced defects in a polycrystalline diamond layer on a tungsten carbide substrate

2009 ◽  
Vol 404 (22) ◽  
pp. 4485-4488 ◽  
Author(s):  
B.N. Masina ◽  
A. Forbes ◽  
O.M. Ndwandwe ◽  
G. Hearne ◽  
B.W. Mwakikunga ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Polycrystalline Diamond ◽  
Thermally Induced ◽  
Diamond Layer ◽  
Induced Defects

Design of High-Efficient Bits for Igneous Rock in Xushen Gasfield

2013 ◽  
Vol 385-386 ◽  
pp. 308-311
Author(s):  
Li Gang Zhang ◽  
Tie Yan ◽  
Shi Bin Li
Keyword(s):  
Tungsten Carbide ◽  
Design Method ◽  
Polycrystalline Diamond ◽  
High Hardness ◽  
Rake Angle ◽  
Gas Field ◽  
Working Face ◽  
High Efficient ◽  
Low Efficiency ◽  
Bit Life

The igneous rocks in deep formations of the Xushen gasfield have the following characters: high abrasive property, high hardness, and high drillability, which lead to many drill bit accidents, few footage per bit , low efficiency of drilling, long drilling cycle, these severely restrict the exploration and development process of gas field. According to the features of deep formation, a hybird cutters bit is designed. It has three cones, with the overhang cone , duplicate taper and offset cone characters. The tungsten carbide cutters and the polycrystalline diamond compacts cutters are alternative collocation in the same tooth row in the bit. The exposed height of the tungsten carbide cutters is higher than polycrystalline diamond compacts cutters. The back rake angle of polycrystalline diamond compacts cutters is 10 ~ 40 °, the side rake angle is 10 ~ 30 °. The normal direction of working face stay the same with the composite slip direction, and the side rake pointed at adjacent gullet. Through the design method, it is integrated that the advantages of roller bit and PDC bit, the way of impact breakage and rotational shear breakage and the prominent performance of tungsten carbide cutters and polycrystalline diamond compacts cutters. It can improveROP and bit life.

Focus on Carbide-Tipped Circular Saws when Cutting Stainless Steel and Special Alloys

2015 ◽  
Vol 1114 ◽  
pp. 13-21 ◽  
Author(s):  
Mario Rosso ◽  
Ildiko Peter ◽  
Federico Gobber
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Tungsten Carbide ◽  
Cobalt Content ◽  
Coarse Grained ◽  
Cemented Carbides ◽  
Grinding Wheel ◽  
Large Power ◽  
Circular Saw ◽  
Circular Saws

Circular saw blades are used exclusively for cut-off work, ranging from small manual feed operations, up to very large power fed saws commonly used for sectioning stock as it comes from a rolling mill or other manufacturing processes for long products. The teeth profile, as well as the tooth configuration are of fundamental importance for the blade performances; through a combination of blade rigidity and grinding wheel condition a good quality surface finish is attained for tools of commercial standard. The materials used for the production of circular saw blades are ranging from high speed steel to cemented carbides. In particular, cemented carbides, being characterized by high hardness and strength, are used in applications where materials with high wear resistance and toughness are required. The main constituents of cemented carbides are tungsten carbide and cobalt. Tungsten carbide imparts the alloys the necessary strength and wear resistance, whereas cobalt contributes to the toughness and ductility of the alloys. The WC-Co alloys are tailored for specific applications by the proper choice of tungsten carbide grain size and the cobalt content. The grain size of the tungsten carbide in WC-Co varies from about 40 µm to around 0.3 µm, the cobalt content from 3 to 30 wt%. The coarse grained hardmetals are mainly used in mining applications, the smallest grain size being about 3 µm and the minimum cobalt content 6 wt%. The grain size of tungsten carbide in the metal cutting industry, as well as for universal applications lies in the range of 1-2 µm. However, with the advent of near net shape manufacturing and thin walled components, the use of submicron carbide is growing, since their high compressive strength and abrasive wear resistance can be used to produce tools with a sharp cutting edge and a large positive rake angle.In this invited paper, a general overview on the actual trends in the choice of the best material when cutting special alloys will be presented and discussed. Based on the recent and past literature some examples of their up-to-date application, such as circular saws used to cut stainless steels and some high strength alloys, are talk over.

Forming Fine V-Grooves on a Tungsten Carbide Workpiece with a PCD Electrode by EDM

2007 ◽  
Vol 329 ◽  
pp. 631-636 ◽  
Author(s):  
Sadao Sano ◽  
Kiyoshi Suzuki ◽  
Wei Li Pan ◽  
Manabu Iwai ◽  
Yoshihiko Murakami ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Pulse Duration ◽  
Flat Surface ◽  
Short Pulse ◽  
Chemical Vapor ◽  
Polycrystalline Diamond ◽  
Chemical Vapor Deposition Diamond ◽  
Electrically Conductive ◽  
Short Pulse Duration ◽  
Low Wear

Polycrystalline diamond (PCD) exhibits a thermal conductivity similar to that of the electrically conductive chemical vapor deposition diamond (EC-CVD diamond) found to function as zero-wear electrodes at short pulse duration. In this study, PCD was used as electrodes applied to EDM on tungsten carbide. Two kinds of PCD (CTB-010 and CTH-025) with a flat surface were used. The wear of the PCD electrodes was about 1.5% for very short pulse duration such as te=1μs, but it was zero wear at te=30μs, though the wear of a Cu-W electrode was 10% even on the machine recommended conditions for the low wear. EDM experiment using a V-shaped PCD electrode with an included angle of 45° was also carried out and the performance was compared with the case using a V-shaped Cu-W electrode. Under the conditions of a no load voltage of 60V, a set peak current of 2A, and a medium pulse duration of te=15μs, there was no wear on PCD electrodes when observed under the SEM, whereas a 50μm-deep wear on the Cu-W electrodes even under the machine recommended condition for the low wear was observed.

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