Cutting performance of a binder-less sintered cubic boron nitride tool in the high-speed milling of gray cast iron

2002 ◽  
Vol 127 (2) ◽  
pp. 217-221 ◽  
Author(s):  
Hideharu Kato ◽  
Kazuhiro Shintani ◽  
Hitoshi Sumiya
Keyword(s):  
Cast Iron ◽  
Boron Nitride ◽  
High Speed ◽  
Gray Cast Iron ◽  
Cubic Boron Nitride ◽  
Cutting Performance ◽  
Gray Cast ◽  
High Speed Milling

Cutting Performance of Reaming Alloy Gray Cast Iron HT250 Using Carbide, Cermet and CBN Reamers

2018 ◽  
Vol 764 ◽  
pp. 261-270 ◽  
Author(s):  
X.K. Yang ◽  
Y.G. Wang ◽  
W.L. Ge ◽  
L. Chen ◽  
H. Ge
Keyword(s):  
Surface Roughness ◽  
Cast Iron ◽  
Tool Life ◽  
Gray Cast Iron ◽  
Cutting Parameters ◽  
Hole Diameter ◽  
Cutting Performance ◽  
Gray Cast ◽  
Suitable Material ◽  
Spindle Power

Cutting performance of reaming alloy gray cast iron HT250 using carbide, cermet and CBN reamers was studied. Experiments were conducted under constant cutting parameters and cooling strategy. Tool life, hole diameter, spindle power, surface roughness and tool wear were analyzed. The hole diameter and spindle power would keep steady when reaming with carbide reamer after 400 holes to the tool life of 1050 holes. But holes diameter reduced and spindle power increased with the number of machined holes increasing during the whole tool life when using cermet or CBN reamer. The surface roughness Rz of the holes reamed by carbide reamer was within the tolerance, although it was worse than that reamed by cermet and CBN reamer. It can be summarized that the carbide was the most suitable material for reaming alloy gray cast iron because of the longest tool life, steady hole diameter and spindle power, qualified surface roughness. After machining, crater wear and clearance wear were produced on the cermet and CBN reamer, which were caused by abrasive wear. In addition, flaking and breakages appeared on the edge of cermet reamer, which were not found on CBN reamer. However, the clearance wear of carbide reamer was smaller than that of CBN reamer, and built up edge was found along the cutting edge.

Surface Integrity of a High Speed Milling FC300 Gray Cast Iron

2013 ◽  
Vol 465-466 ◽  
pp. 642-646 ◽  
Author(s):  
Abu Bakar Mohd Hadzley ◽  
Mohamad Raffi Nurul Fatin ◽  
Raja Abdullah Raja Izamshah ◽  
Nur Izan Syahriah Hussein ◽  
Ahmad Siti Sarah ◽  
...  
Keyword(s):  
Cast Iron ◽  
Automotive Industry ◽  
High Speed ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Surface Finishing ◽  
High Speed Machining ◽  
High Productivity ◽  
Die Surface ◽  
End Mills

The high speed machining (HSM) of gray cast iron for manufacture mold and dies involve many different cutting tool from deep hole drills to smallest ball nose end mills [. Due to the demand of fast and high productivity, high speed machining (HSM) has been increasingly used to produce mold and dies that are mostly used in automotive industry especially for stamping dies components. The process of HSM sometimes combined together with manual polishing to enhance the die surface into fine mirror finish. Although the manual polishing strongly depends by experience and skill of workers, this technique is the preferable option for polishing of moulds and dies. However, such extensive manual polishing will provide some drawback because of many human factors such as pressure and technique of polishing individual person uses. Therefore, the application high speed machining in manufacturing is still demanding as it can improve surface finishing by reducing manual polishing, reportedly account for up to 30% of the total time [2].

Machinability of Pearlitic Cast Iron With Cubic Boron Nitride (CBN) Cutting Tools

2002 ◽  
Vol 124 (4) ◽  
pp. 820-832 ◽  
Author(s):  
Jiancheng Liu ◽  
Kazuo Yamazaki ◽  
Hiroyuki Ueda ◽  
Norihiko Narutaki ◽  
Yasuo Yamane
Keyword(s):  
Cast Iron ◽  
Boron Nitride ◽  
Tool Wear ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Machining Conditions ◽  
Machining Center

In order to increase the accurate finishing productivity of pearlitic cast iron, face milling by CBN (Cubic Boron Nitride) cutting tools was studied. The main focus of the study is the machinability investigation of pearlitic cast iron with CBN cutting tools by studying the relationships among machining conditions such as feed rate, cutting speed as well as CBN cutting tool type, tool wear, workpiece surface quality, cutting forces, and cutting temperature. In addition, an emphasis is put on the effect of Al additive in pearlitic cast iron on its machinability and tool wear characteristics. High-speed milling experiments with CBN cutting tools were conducted on a vertical machining center under different machining conditions. The results obtained provide a useful understanding of milling performance by CBN cutting tools.

Generation of Wear Protective Layer in High Speed Turning of Gray Cast Iron Containing Aluminium and Magnesium

2009 ◽  
Vol 407-408 ◽  
pp. 500-503 ◽  
Author(s):  
Satoshi Furuya ◽  
Nobuaki Ozoe ◽  
Yasuo Yamane
Keyword(s):  
Cast Iron ◽  
Tool Wear ◽  
High Speed ◽  
Gray Cast Iron ◽  
Cutting Speed ◽  
Protective Layer ◽  
Gray Cast ◽  
Nitride Ceramics ◽  
Tool Surface ◽  
Coated Carbide

This paper focuses on the influence of difference of tool materials on generation of wear protective layer when turning gray cast iron containing Al and Mg. In this experiment, the gray cast iron to which small quantities of Al and Mg was added were cut with cermet, P grade carbide (P10), silicon nitride ceramics (Si3N4), titanium nitride (TiN) coated carbide and K grade carbide (K10) at high speed. In turning gray cast iron containing Al and Mg with cermet, the tool wear was significantly reduced compared to that resulting from the cutting of conventional gray cast iron. Further, the protective layer consisting of nonmetallic inclusions in the work material was formed on the tool surface. In addition to cermet, this layer was formed on tool surface of Si3N4 and TiN coated carbide. The elements of Al and Mg added to the work materials were detected in the layers formed on these tool surfaces as well as cermet. The inhibiting effect on tool wear was also caused when turning with P10. However, P10 had much greater wear than cermet. On the other hand, in the case of turning with K10, the effect reducing wear with the addition of Al and Mg was not caused. The wear increased as cutting speed increased regardless of work materials.

scholarly journals High Speed Cutting of Gray Cast Iron and Steel with Al2O3-TiC Ceramics Tools.

1992 ◽  
Vol 39 (11) ◽  
pp. 1028-1032
Author(s):  
Toshiyuki Takahashi ◽  
Yuji Katsumura ◽  
Hirotaka Kiso ◽  
Hisashi Suzuki
Keyword(s):  
Cast Iron ◽  
High Speed ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Iron And Steel ◽  
High Speed Cutting

Surface Turbulence at Flow of Gray Cast Iron

2010 ◽  
Vol 457 ◽  
pp. 422-427 ◽  
Author(s):  
Attila Diószegi ◽  
Tobias Björklind ◽  
Zoltán Diószegi
Keyword(s):  
Cast Iron ◽  
High Speed ◽  
Gray Cast Iron ◽  
Liquid Surface ◽  
Gray Cast ◽  
Average Flow Velocity ◽  
Mould Filling ◽  
Surface Turbulence ◽  
Different Levels ◽  
Absorption Of Hydrogen

Gray cast iron has been investigated with respect to surface turbulence during mould filling. Different levels of flow velocities have been provoked in a vertically parted sand mould. The thermal resistant transparent front side of the mould permitted the observation of the flow pattern due to high speed camera registration. The registered frames including the liquid surface were investigated using image analyses. The results show good correlation between the average flow velocity and the liquid iron surface extension. Consequently it has been demonstrated that an increased absorption of hydrogen and nitrogen during mould filling is dependent on the level of liquid surface turbulence.

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