Tool Wear in Milling Hardened Die Steel

1998 ◽  
Vol 120 (4) ◽  
pp. 669-673 ◽  
Author(s):  
S. Nelson ◽  
J. K. Schueller ◽  
J. Tlusty
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Flank Wear ◽  
Chip Thickness ◽  
Hardened Steel ◽  
Depth Of Cut ◽  
Limiting Factor ◽  
End Mill ◽  
Carbide Inserts ◽  
Cutting Speeds

Tool wear is an important limiting factor in machining hardened steel. Plane milling of H13 hot work tool steel (42–46 HRC) was conducted on a three-axis machine to obtain flank wear data with the objective of finding operating parameters providing extended tool life. Microgram carbide and PCBN tipped carbide round inserts in an off-center ball nose end mill with a single cutting edge were considered. Tool life was longer for the micrograin carbide inserts when cutting speeds were near 150 m/min. The PCBN grades performed best at the highest speed tested. A limited radial and axial depth of cut with a larger maximum chip thickness provided the best tool life over the parameters tested.

Tool Life Analysis when Turning Ti-6Al-4V Using Vegetable Oil-Based Cutting Fluid

2017 ◽  
Vol 882 ◽  
pp. 36-40
Author(s):  
Salah Gariani ◽  
Islam Shyha ◽  
Connor Jackson ◽  
Fawad Inam
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Vegetable Oil ◽  
Flank Wear ◽  
Cutting Speed ◽  
Fractional Factorial ◽  
Cutting Fluid ◽  
Depth Of Cut ◽  
Tool Flank Wear ◽  
Fluid Concentration

This paper details experimental results when turning Ti-6Al-4V using water-miscible vegetable oil-based cutting fluid. The effects of coolant concentration and working conditions on tool flank wear and tool life were evaluated. L27 fractional factorial Taguchi array was employed. Tool wear (VBB) ranged between 28.8 and 110 µm. The study concluded that a combination of VOs based cutting fluid concentration (10%), low cutting speed (58 m/min), feed rate (0.1mm/rev) and depth of cut (0.75mm) is necessary to minimise VBB. Additionally, it is noted that tool wear was significantly affected by cutting speeds. ANOVA results showed that the cutting fluid concentration is statistically insignificant on tool flank wear. A notable increase in tool life (TL) was recorded when a lower cutting speed was used.

Wear Characteristic and Life of Al2O3/(W,Ti)C Ceramic Tool in Turning Iron-Based P/M Composites

2010 ◽  
Vol 26-28 ◽  
pp. 1052-1055
Author(s):  
Li Fa Han ◽  
Sheng Guan Qu
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Empirical Model ◽  
Feed Rate ◽  
Flank Wear ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Ceramic Tool ◽  
Iron Based

The wear characteristics and life of Al2O3/(W,Ti)C ceramic tool in turning NbCp-reinforced iron-based P/M composites was investigated. Experimental results indicate that cutting parameters have an influence on tool wear, among which cutting speed and depth of cut seem to be more prominent. The maximum flank wear rapidly increases as the increase in cutting speed and depth of cut. While, it increases gradually as the decrease in feed rate. Meanwhile, an empirical model of tool life is established, from which the influence of cutting speed and depth of cut on tool life is far greater than that of feed rate. Also from the empirical model, the preferable range of cutting parameters was obtained.

Performance of Brazed Carbide End Mill Tool for Machining of Ti6Al4V

2014 ◽  
Vol 541-542 ◽  
pp. 363-367 ◽  
Author(s):  
Saad Nawaz ◽  
Li Xiao Xing ◽  
Zhou Chai
Keyword(s):  
Tool Wear ◽  
Titanium Alloys ◽  
Tool Life ◽  
Thermal Stresses ◽  
Elevated Temperatures ◽  
Aerospace Industry ◽  
Cutting Speed ◽  
Weight Ratio ◽  
Depth Of Cut ◽  
End Mill

Titanium alloys are attractive materials for aerospace industry due to their exceptional strength to weight ratio that is maintained at elevated temperatures and their good corrosion resistance. Major applications of Titanium alloys were military aerospace industry, but since last decade the trend has now shifted towards commercial industry. On the other hand Titanium alloys are notorious for being poor thermal conductor that leads to them being difficult materials for machining. In this experimental study brazed carbide end mill of grade 5 is used for rough down milling of Ti6Al4V for large depth of cut under different combinations of parameters and application of high pressure coolant. The machining performance was evaluated in terms of tool wear, tool life, thermal crack and tool breaking. The tool wear was mostly observed at the tool tip and at bottom part of tool thermal cracks were observed which propagated with respect to time. Flank wear due to scratching of the cutting chips and diffusion wear because of high thermal stresses were observed specially at the bottom of the cutting tool. At cutting speed of 38m/min tool wear couldnt be observed due to tool failure because of fracture under high thermal stresses. It was found that maximum tool life is obtained at the speed of 25m/min, feed rate of 150mm/min and depth of cut of 10mm. In the end it was concluded that machining of Ti6Al4V is a thermally dominant process which leads to high thermal stresses in machining zone that results in increasing tool wear rate and fracture propagation.

Effect of Pick Feed on Machining Characteristic of Up Cutting in the High-Efficient Machining by Small Diameter Radius End Mill

2019 ◽  
Vol 825 ◽  
pp. 31-38
Author(s):  
Hisaaki Nakai ◽  
Takekazu Sawa ◽  
Masahiro Anzai
Keyword(s):  
Tool Wear ◽  
High Speed ◽  
Flank Wear ◽  
Small Diameter ◽  
Hardened Steel ◽  
End Mill ◽  
High Speed Milling ◽  
Improve Efficiency ◽  
High Efficient ◽  
Coated Carbide

In order to improve efficiency of high speed milling, effects of pick feeds of up cutting and down cutting on tool wear and processing characteristics were investigated after cutting pre-hardened steel NAK 55 by TiAlN-coated carbide radius end mill. Flank wear of the tools after up cutting was less than down cutting when the pick feed was smaller than 0.1 mm, which tendency changed when the pick feed was larger than 0.3 mm.

Cutting Forces and Tool Wear in Dry Milling of Ti6Al4V

2012 ◽  
Vol 565 ◽  
pp. 454-459 ◽  
Author(s):  
Yun Chen ◽  
Huai Zhong Li ◽  
Jun Wang
Keyword(s):  
Tool Wear ◽  
Cutting Forces ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Dry Milling ◽  
Workpiece Material ◽  
Tool Wear Mechanism ◽  
Coated Carbide ◽  
Carbide Inserts ◽  
Cutting Speeds

Titanium alloys are difficult-to-cut materials. This paper presents an experimental study of the effects of different cutting conditions and tool wear on cutting forces in dry milling Ti6Al4V with coated carbide inserts. The experimental results show that the peak forces increase with the increase in the feed rate and depth of cut. With the cutting speed increment in the range from 50 m/min to 150 m/min the peak forces decrease, while at further higher cutting speeds investigated peak forces increase. The decrease of the peak forces is due to thermal softening of the workpiece material and the increase is because of the strain hardening rate of Ti6Al4V. The tool wear experiment reveals that the major tool wear mechanism is the flank wear. The variations of the peak forces are caused by both the tool wear propagation and the thermal effects.

Modeling of Tool Wear in Turning EN 31 Alloy Steel using Coated Carbide Inserts

2012 ◽  
Vol 2 (3) ◽  
pp. 34-51 ◽  
Author(s):  
Davinder Sethi ◽  
Vinod Kumar
Keyword(s):  
Mathematical Model ◽  
Tool Wear ◽  
Alloy Steel ◽  
Flank Wear ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
En 31 ◽  
Coated Carbide ◽  
Carbide Inserts

The experimental investigations of the tool wear in turning of EN 31 alloy steel at different cutting parameters are reported in this paper. Mathematical model has been developed for flank wear using response surface methodology. This mathematical model correlates independent cutting parameters viz. cutting speed, feed rate and depth of cut with dependent parameters of flank wear. This model is capable of estimating the tool wear at different cutting conditions. The central composite design has been used to plan the experiments. Coated carbide inserts have been used for turning EN 31 alloy steel. Results revealed that cutting speed is the most significant factor effecting flank wear, followed by depth of cut and feed rate. Flank wear increases with increase in all the three cutting parameters.

Experimental Investigation on Tool Wear when End-Milling Inconel 718 with Coated Carbide Inserts

2011 ◽  
Vol 188 ◽  
pp. 410-415 ◽  
Author(s):  
Yuan Wei Wang ◽  
Jian Feng Li ◽  
Z.M. Li ◽  
Tong Chao Ding ◽  
Song Zhang
Keyword(s):  
Tool Wear ◽  
Inconel 718 ◽  
Flank Wear ◽  
End Milling ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Radial Depth ◽  
Coated Carbide ◽  
Carbide Inserts

In this paper, some experiments were conducted to investigate tool wear when end-milling Inconel 718 with the TiAlN-TiN PVD coated carbide inserts. The worn tools were examined thoroughly under scanning electron microscope (SEM) with Energy Dispersive X-ray Spectroscopy and 3D digital microscope to expatiate tool wear morphologies and relevant mechanisms. The flank wear was uniformity in finishing milling process, and the average flank wear were selected as the criterion to study the effects of cutting parameters (cutting speed, feed per tooth, radial depth of cut, and axial depth of cut) on tool wear. Finally, the optimal combination of the cutting parameters for the desired tool life is obtained.

scholarly journals Impact of Cutting Speed on Tool Life of Coated and Uncoated Cemented Carbide during Turning of S31700 Grade Stainless Steel

2020 ◽  
Vol 9 (5) ◽  
pp. 2022-2025
Keyword(s):  
Stainless Steel ◽  
Tool Wear ◽  
Stainless Steels ◽  
Entire Range ◽  
Flank Wear ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cemented Carbides ◽  
Depth Of Cut ◽  
Cutting Speeds

Here, we found and observed different results of experimental work in dry turning of S31700 grade stainless steels using coated and uncoated cemented carbides. The turning tests were conducted at three different cutting speeds (150and 200m/min) while feed rate and depth of cut were kept constant at 0.3 mm/rev and 1 mm, respectively. The cutting tools used were ISO P30 uncoated and TiN-TiCN-Al2O3 -ZrCN coated cemented carbides. We found the influences of cutting speed on the average flank wear. The worn parts of the cutting tools were also examined using optical microscopy and SEM. Here we concluded that cutting speed significantly affected the average flank wear. The multilayer effects superior resistance to tool wear compared to its uncoated counterpart in the entire range of cutting speeds during turning of S31700 stainless (AISI317) steel.

Cutting Force and Tool Wear in Face Milling of Hardened Steel

2012 ◽  
Vol 723 ◽  
pp. 77-81 ◽  
Author(s):  
Xiao Bin Cui ◽  
Jun Zhao
Keyword(s):  
Wear Rate ◽  
Tool Wear ◽  
Cutting Force ◽  
Tool Life ◽  
Cutting Speed ◽  
Face Milling ◽  
Depth Of Cut ◽  
Tool Wear Rate ◽  
Radial Depth ◽  
Cutting Speeds

In the present study, face milling of AISI H13 steel (46-47 HRC) with CBN tools was conducted. Cutting speeds 389 and 1592 m/min were adopted in order to identify the characteristics of cutting force and tool wear at low and high cutting speeds. For each cutting speed, the metal removal rate and axial depth of cut were set to be invariable, and different combinations of radial depth of cut and feed per tooth were selected. The optimum combination of radial depth of cut and feed per tooth for each cutting speed was distinguished. For different cutting speeds, the cutting force changed in varying ways with different combinations of cutting parameters. At the cutting speed of 389 m/min, after the initial cutting stage, the tool wear rate was low even at the end of tool life. When the cutting speed was 1592 m/min, the tool wear increased rapidly, and the tool wear rate changed little in the whole tool life span. Adhesion and abrasion were the main wear mechanisms of the tool faces at the cutting speed of 389 m/min. While at the cutting speed of 1592 m/min, fracture contributed greatly to the final tool failure.

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