Modification of the Surface of a Reconditioned Cutting Tool via Laser Ablation

2021 ◽  
Vol 1037 ◽  
pp. 558-563
Author(s):  
Elmar Yagyaev ◽  
Seran Akimov
Keyword(s):  
Laser Ablation ◽  
Tool Life ◽  
Processing Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Untreated Sample ◽  
Nanosecond Duration ◽  
Modified Surfaces ◽  
Modification Of The Surface

The article discusses the possibility of using pulsed laser ablation of nanosecond duration to modify the surface of a cutting tool after regrinding and restoration. Experimental studies of the resistance characteristics of cutting tools with modified surfaces via laser ablation in air and in liquid have been carried out. It was found that after modifying the surface of cutting plates via laser ablation in air, the wear on the trailing surface of the cutting tool at a processing speed of V = 50 m/min is 8 times less than that of the untreated one, the build-up is 20 times less. The wear of the trailing surface of the plates at V = 70 m/min is 2 times less than that of the untreated sample. The resistance studies show surface modification of the cutting tool increases the tool life of the remanufactured tool, overall tool life and savings in tool costs.

scholarly journals INVESTIGATION OF THE METHOD OF PROCESSING HOLES WITH A ROTARY CUP CUTTER WITH SURFACING

2021 ◽  
pp. 1-6
Author(s):  
Bakytzhan Donenbayev ◽  
Karibek Sherov ◽  
Assylkhan Mazdubay ◽  
Aybek Sherov ◽  
Medgat Mussayev ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Large Diameter ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Surface Hardness ◽  
Hard Metal ◽  
Metal Plates ◽  
Study Results ◽  
The Cost

This article presents the experimental study results of the process of rotational friction holes boring using a cup cutter surfaced by STOODY M7-G material. As a result of experimental studies, the following quality indicators were achieved: surface roughness within Ra=10÷1,25 micrometer; surface hardness within HB 212-248. Using a cup cutter surfaced by STOODY M7-G material in case of rotational friction boring of large-diameter holes for large-sized parts can improve processing performance in comparison with cutting tools equipped with hard metal plates and provided the required surface roughness. Preliminary calculations showed that the manufacture of cup cutters from non-instrumental materials reduces the cost of the cutting tool by 5-7 times and the cost of the operation by 1.5-2 times.

Influence of Edge Preparation on Cutting Tool Wear

2012 ◽  
Vol 201-202 ◽  
pp. 1178-1181
Author(s):  
Guo Bing Chai ◽  
Wei Wang ◽  
Ai Bing Yu
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Cutting Tool ◽  
Impact Resistance ◽  
Cutting Tools ◽  
Medium Carbon Steel ◽  
Cutting Edge ◽  
Cutting Tool Wear ◽  
Edge Radius ◽  
Edge Preparation

Edge preparation is not only the process of grinding proper geometry of cutting edge or removing micro-cracks on cutting edge region, but also a way of improving cutting tool life. In this study, cutting models with different cutting edge radius were set up with FEM software. Medium carbon steel cutting tests were carried out using cutting tools with different edge radius. Cutting tool wear was simulated and measured for comparison. The simulation results show that edge radius has influences on tool wear. Tool cutting behavior is concerned with edge radius. A proper edge radius will improve the tool life. The experimental results show that proper edge preparation could improve tool impact resistance capability and reduce tool wear. The cutting tool life can be prolonged with suitable edge preparation. Edge preparation can improve cutting performance of cutting tool.

Effectiveness of the Cryogenic Treatment of Tungsten Carbide Inserts on Tool Wear When in Full Production Operations

2004 ◽  
Author(s):  
Kenneth A. Arner ◽  
Christopher D. Agosti ◽  
John T. Roth
Keyword(s):  
Tool Life ◽  
Cutting Tool ◽  
Cryogenic Treatment ◽  
Cutting Tools ◽  
Process Variable ◽  
Production Lines ◽  
Industrial Partner ◽  
Full Production ◽  
Carbide Inserts

As a cutting tool wears, the quality of the parts being produced by the tool are reduced. Therefore, it is important to change cutting tools whenever the wear on the tool begins to cause unacceptable or out-of-specification parts. However, frequent replacement of tooling is not only expensive, it also results in a loss of production throughput. Therefore, in order to lower tooling costs and increase production rates, it is vital to extend cutting tool life. Thus, this research focuses on establishing the effect that cryogenically treating carbide inserts has on the overall tool life when the tools are operating in production. To validate the effectiveness, multiple treated and untreated cutting tools for five styles of inserts are examined. The cutters are tested in production lines that are fabricating parts for an industrial partner where the only process variable that is changed is the cryogenic treatment of the tooling. For the five insert styles tested, each style provided very consistent changes in overall tool life. However, the amount of improvement was dependent on the tool style. One style was found to have its life doubled, whereas, another style had its life decreased. Possible causes for this difference in effectiveness of the treatment are presented, along with a discussion concerning the actual costs savings that the treatment represents for the industrial partner.

Methods of Forecasting Wear Resistance of Cutting Tools Based on the Properties of their Materials

2014 ◽  
Vol 682 ◽  
pp. 491-494 ◽  
Author(s):  
Vladislav Bibik ◽  
Elena Petrova
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Chemical Properties ◽  
Tool Material ◽  
Composition Structure ◽  
Metal Cutting Tool ◽  
Physical And Chemical ◽  
Thermo Physical Properties

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.

Improvement of Tool Life of a Commercial Drill Bits by Cryogenic Treatment While Machining Widmanstatten Ti-6Al-4V.

2021 ◽  
Author(s):  
Abdullah Sert ◽  
Fatih Hayati ÇAKIR
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Cutting Forces ◽  
Cutting Tool ◽  
Cryogenic Treatment ◽  
Cutting Tools ◽  
Drill Bit ◽  
Deep Cryogenic Treatment ◽  
Drill Bits ◽  
Stereo Microscope

Abstract In this study, the performance of Ø 8 mm WC-Co (10%) drill bits with a TiAlN coating was tested for machining of Ti6Al4V alloy with a Widmanstatten structure. In order to improve the tool life, cutting tools were subjected to deep cryogenic treatment. In total, three groups of tools were prepared for this study. The first group was used for reference as the supplied state; the second group was subjected to 24 hours deep cryogenic treatment at -196 ° C, and the third group was subjected to 24 hours deep cryogenic at -196 ° C, additionally was tempered 2 hours at 200 ° C. Machining experiments were done by drilling and a set of 60 holes were drilled with each drill bit, and tool wear were observed and recorded with a stereo microscope. Additionally, Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS) analyses were carried on to understand the tool wear better. The microhardness of Cryo-treated and tempered cutting tools hardness increased up to 20 Hv (about 1%), and the toughness value did not change significantly. Cutting performance was observed by measuring the cutting forces during drilling experiments. According to these results, deep cryogenic treatment on WC-Co-based inserts decreased cutting forces by approximately 7% compared to the reference drill bit, which affected the cutting tool life. The dominant wear mechanism was Built-up edge (BUE) formation, and cryo-treatment lowered the BUE amount 8% and cryo-treated and tempered drill bit 45% compared to the reference drill bit.

Performance evaluation of a tungsten carbide–based self-lubricant cutting tool

2016 ◽  
Vol 232 (10) ◽  
pp. 1825-1836 ◽  
Author(s):  
Ayyankalai Muthuraja ◽  
Selvaraj Senthilvelan
Keyword(s):  
Tungsten Carbide ◽  
Cutting Force ◽  
Tool Life ◽  
Solid Lubricant ◽  
Cutting Tool ◽  
Flank Wear ◽  
Cutting Tools ◽  
Chip Morphology ◽  
Machined Surface ◽  
Flank Surface

Tungsten carbide cutting tools with and without solid lubricant (WC-10Co-5CaF2 and WC-10Co) were developed in-house via powder metallurgy. The developed cutting tools and a commercial WC-10Co cutting tool were used to machine cylindrical AISI 1020 steel material under dry conditions. The cutting force and average cutting tool temperature were continuously measured. The cutting tool flank surface and chip morphology after specific tool life (5 min of cutting) were examined to understand tool wear. The flank wear of the considered cutting tools was also measured to quantify the cutting tool life. The surface roughness of the workpiece was measured to determine the machining quality. The developed cutting tool with solid lubricant (WC-10Co-5CaF2) generated 20%–40% less cutting force compared to that of the developed cutting tool without solid lubricant (WC-10Co). In addition, the finish of the workpiece surface improved by 16%–20% when it was machined by the solid lubricant cutting tool. The cutting tool with solid lubricant (WC-10Co-5CaF2) exhibited a 15%–18% reduction in flank wear. Curlier and smaller saw tooth chips were generated from the WC-10Co-5CaF2 cutting tool, confirming that less heat was generated during the cutting process, and the finish of the machined surface was also improved.

Experimental Tool Wear Observation of Assisted High Pressure Cryogenic Jet in Hard Turning Process

2017 ◽  
Author(s):  
Dong Min Kim ◽  
Do Young Kim ◽  
In Su Jo ◽  
Tae Jin Song ◽  
Kyung Soo Paik ◽  
...  
Keyword(s):  
High Pressure ◽  
Tool Wear ◽  
Tool Life ◽  
Hard Turning ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Alumina Ceramic ◽  
Cryogenic Cooling ◽  
Turning Process ◽  
Dry Conditions

The hard turning process is widely used in automobile and heavy machinery industries. Extreme cutting conditions like high temperature and tool wear rate, are associated with the hard turning process. Cubic boron nitride (CBN) cutting tool is generally preferred for hard machining operations. However, higher tool cost, and tool failure due to thermal shock limits its widespread usage. In machining performance analysis, tool wear is an important parameter which is directly related to the cost of the machining process. Previous studies have reported the improvement in tool life by using cryogenic coolant as a cutting fluid. Objective of this paper is to investigate the effect of cryogenic cooling on the tool wear of CBN and Ti-coated alumina ceramic cutting tools used in the hard turning of AISI 52100 hardened steel. High pressure cryogenic jet (HPCJ) module was optimized and configured to use it for hard turning case. Computational fluid dynamics (CFD) based simulation was used to test and optimize the nozzle design for the flow of cryogenic coolant. It was validated by fundamental heat removal test. Ceramic and CBN cutting tools were then used for hard turning of parts using HPCJ module. Flank wear lengths for various cooling conditions were measured and analyzed. It was observed that the higher tool life of a Ti-coated alumina ceramic can be achieved under cryogenic cooling technique, as compared to the CBN insert under dry conditions. Cost analysis of these hard turning cases was also conducted to check the feasibility of its usage under realistic shop floor conditions. It was observed that the machining using Ti-coated ceramic under cryogenic jet may reduce the total tooling cost compared to CBN cutting tool conducted under dry conditions.

Qualification of Coatings to Predict Wear Behavior of Micro Blasted Cutting Tools

2010 ◽  
Vol 438 ◽  
pp. 23-29 ◽  
Author(s):  
Fritz Klocke ◽  
Christof Gorgels ◽  
Arne Stuckenberg ◽  
Emmanouil Bouzakis
Keyword(s):  
Tool Life ◽  
Zirconium Oxide ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Production Engineering ◽  
Coating Technology ◽  
Testing Method ◽  
Increase Tool Life ◽  
Tool Treatment

In today’s production engineering nearly every cutting tool is coated. In the field of coating technology and tool treatment blasting is a common way to increase tool life or hold it on a constant level for several reconditioning steps. The latest innovation referring blasting are micro blasted coatings. For this technology a parameter variation was examined and the consequential tool life was compared with common testing method for tool systems in order to qualify the coating treatment. The investigations were carried out using an aluminum and zirconium oxide as blasting abrasive and by varying the blasting parameters pressure and duration. Finally, the treatment led to an optimized tool wear behavior due to micro blasting of the coating and the wear behavior could be referenced against the testing methods.

Performance Analysis of Cryogenically Treated HSS Profile Cutter by Experimental and FEA

2013 ◽  
Vol 816-817 ◽  
pp. 311-316
Author(s):  
B.R. Ramji ◽  
H.N. Narasimha Murthy ◽  
B.K. Deepak
Keyword(s):  
Performance Analysis ◽  
Temperature Profile ◽  
Tool Life ◽  
Cutting Tool ◽  
Cryogenic Treatment ◽  
Cutting Tools ◽  
Spring Steel ◽  
Machining Conditions ◽  
Double Tempering ◽  
Steel Cutting

The main objective of the research was to study the effect of cryogenic treatment and double tempering on the tool life of HSS profile cutter in machining EN47 Spring Steel cutting tool components. TiAlN coated HSS profile cutters were cryogenically treated at-175 °C and double tempered at 200 °C. Milling exercises were carried out using un-treated and treated and double tempered tools on EN-47 spring steel reamer components at different machining conditions. The treated HSS profile cutter showed 40 % greater tool life than that of the un-treated in machining EN-47 spring steel components for making flutes. FEA for temperature profile of the cutting tools of the treated and non-treated was performed. Tool tip temperature for untreated and treated were found to be 22 °C and 20 °C respectively.

Improving the Efficiency of Rock Destruction Tools when Drilling Wells in difficult Mining and Geological Conditions

2021 ◽  
Vol 9 (3) ◽  
pp. 198-202
Keyword(s):  
Temperature Regime ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Rock Cutting ◽  
Rock Destruction ◽  
Bottom Hole ◽  
Geological Conditions ◽  
Difficult Terrain ◽  
Forced Cooling

Air blast drilling is effective in the most unfavorable conditions for liquid flushing: when drilling in areas with significant circulation losses, when there are difficulties with water supply, in high mountainous or difficult terrain, or in areas with harsh climates. However, air has a low heat capacity compared to liquid flushing solutions, this affects the operation of rock cutting tools through high contact temperatures with irreversible consequences such as deformation of matrices, destruction of diamonds, grinding, reduction of diamond hardness and tool burns. To prevent these problems, there is a need to develop technical means and technology to effectively ensure the temperature regime of the rock-cutting tool. This article discusses the possibility of normalizing and regulating the temperature regime of the rock-cutting tool due to forced cooling of the cleaning air at the bottom hole to negative temperatures, and a new design of the drilling projectile for drilling with air purging is developed. The results of experimental studies of the developed design of the drilling projectile are also presented.

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