scholarly journals Wear of Polycrystalline Diamond Tool in Cutting of Unidirectional SiC Whisker-Reinforced Plastic. Influence of Whisker Orientation and Grain Size of Diamond.

1996 ◽  
Vol 62 (599) ◽  
pp. 2857-2863 ◽  
Author(s):  
Katsumi YAMAGUCHI ◽  
Jamal El-Deen AFAGHANI ◽  
Iwao HORAGUCHI ◽  
Takeshi NAKAMOTO
Keyword(s):  
Grain Size ◽  
Diamond Tool ◽  
Polycrystalline Diamond ◽  
Reinforced Plastic

Deterioration of polycrystalline diamond tools in milling of carbon-fiber-reinforced plastic

2016 ◽  
Vol 51 (16) ◽  
pp. 2277-2290 ◽  
Author(s):  
Zhenyuan Jia ◽  
Youliang Su ◽  
Bin Niu ◽  
Yu Bai ◽  
Guangjian Bi
Keyword(s):  
Carbon Fiber ◽  
Diamond Tool ◽  
Cutting Speed ◽  
Tool Material ◽  
Polycrystalline Diamond ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

The cutting edge of the polycrystalline diamond tool easily blunts in high-speed milling of carbon-fiber-reinforced plastic with the tool deterioration. It aggravates the burrs damage due to the change in the tool–material interaction. Therefore, this paper analyzes the tool–material interaction in milling of carbon-fiber-reinforced plastic based on the material-removal mechanism to investigate the tool deterioration mechanism. It reveals that there are two main reasons for the tool deterioration: the extreme crashing and ploughing of the uncut fibers on the tool, and the serious impact of fibers strongly supported on the cutting edge. An indirect measure method is proposed to quantify the tool deterioration including the ploughing-caused wear and impact-caused microchipping. Furthermore, the milling tests are performed to evaluate the tool deterioration under different cutting speeds in the range of 7.33–9.42 m/s. Meanwhile, a modified mathematical model of tool life is proposed based on a strict burr specification in milling of the carbon-fiber-reinforced plastics. Polycrystalline diamond tool has the longest life with the run-in wear and the quasi-steady-state wear for 7.33 m/s cutting speed, and the life rapidly decreases with the increase in the cutting speed in this range. For the cutting speed larger than 8.37 m/s, the wear resistance of polycrystalline diamond tool is very low, because the accelerated state wear occurs instead of the quasi-steady-state wear. Thus, the optimization of the tool geometry and the assisted lubrication should be applied for its improvement.

Small Holes Fabrication on Soda Glass by Self-Elastic Polycrystalline Diamond Tool

2012 ◽  
Vol 516 ◽  
pp. 516-521
Author(s):  
Chung Chieh Cheng ◽  
Dong Yea Sheu
Keyword(s):  
Surface Roughness ◽  
Diamond Tool ◽  
Polycrystalline Diamond ◽  
The Self ◽  
High Quality ◽  
Drilling Tool ◽  
Drilling Tools ◽  
Absorbing Materials ◽  
New Type ◽  
Small Holes

This study describes a novel process to drill small holes in brittle materials such as glass, silicon and ceramic using a self-elastic polycrystalline diamond (PCD) drilling tool. In order to improve the surface roughness and reduce crack of the small holes, a new type of self-elastic PCD drilling tool equipped with vibration absorbing materials inside the housing was developed to fabricate small holes in glass in this study. The self-elastic PCD drilling tools could absorb the mechanical force by the vibration absorbing materials while the PCD tool penetrates into the small holes. Compared to conventional PCD drilling tools, the experimental results show that high-quality small holes drilled in glass can be achieved with cracking as small as 0.02mm on the outlet surface using the self-elastic PCD drilling tool.

A Truing Technique of Flattening Diamond Grains for Fabricating Microstructures with Fine Surfaces

2008 ◽  
Vol 389-390 ◽  
pp. 350-355
Author(s):  
Takeshi Harada ◽  
Takuya Semba
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Diamond Tool ◽  
Electrical Discharge Machining ◽  
Polycrystalline Diamond ◽  
Mesh Size ◽  
Diamond Disk ◽  
Working Surface ◽  
Work Material ◽  
Tool Profile

A truing technique that can be used to shape the tip of an electroformed diamond tool into a hemisphere and flatten diamond grains on the tool working surface at the same level as the bond face was developed. A polycrystalline diamond disk whose top surface roughened by electrical discharge machining was partially flattened by grinding was used as a truer. Diamond grains on the tool working surface were successfully flattened along the hemispherical tool profile when the grains mesh size of #1000 was employed. In addition, a grinding test using glasslike carbon as a work material revealed that a surface roughness of less than 50 nm Rz could be obtained in both cases when moving the tool on contour and scanning paths.

Effect of Cutting Speed on the Face Milling of CFRP Using a PCD Tool

2016 ◽  
Vol 874 ◽  
pp. 487-491
Author(s):  
Takayuki Kitajima ◽  
Takumi Horiuchi ◽  
Akinori Yui ◽  
Yosuke Ito
Keyword(s):  
Mechanical Characteristics ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Polycrystalline Diamond ◽  
Face Milling ◽  
Fiber Reinforced Plastic ◽  
Pcd Tool ◽  
Reinforced Plastic ◽  
The Face ◽  
Cutting Speeds

Carbon-fiber-reinforced plastic (CFRP) is used in various industries such as aerospace and automobile industries because of its high mechanical characteristics. However, this material is difficult to cut. Tool wear and delamination frequently occur during the drilling or cutting of CFRP. In previous studies, we developed a CFRP cutting tool using polycrystalline diamond (PCD). The PCD tool exhibited excellent cutting performance at cutting speeds as low as <120 m/min. In this study, the authors investigated the effect of cutting speed on the face milling of CFRP by using the developed PCD tool.

Hole Surface Quality and Damage When Drilling Unidirectional CFRP Composites

2012 ◽  
Author(s):  
Eshetu D. Eneyew ◽  
M. Ramulu
Keyword(s):  
Significant Variation ◽  
Thrust Force ◽  
Cutting Speed ◽  
Polycrystalline Diamond ◽  
Surface Damage ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Cfrp Composite ◽  
Cutting Direction

In this study, an experimental investigation on the drilling of unidirectional carbon fiber reinforced plastic (UD-CFRP) composite was conducted using polycrystalline diamond (PCD) tipped eight facet drill. The quality of the drilled hole surface was examined through surface roughness measurements and surface damage by scanning electron microscopy (SEM). It was found that, fiber pullout occurred in two specific sectors relative to the angle between the cutting direction and the fiber orientation. The thrust force was highly influenced by the feed rate than the cutting speed and it shows a significant variation throughout the rotation of the drill.

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