Features of the formation of wear of the cutting part of a single-sided cutting drill

2021 ◽  
pp. 71-76
Author(s):  
Keyword(s):  
Successive Approximation ◽  
Process Parameters ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Edge ◽  
Deep Hole ◽  
Drilling Hole ◽  
Cutting Zone ◽  
Tool Cutting

On the basis of experiments and the theory of metal cutting, the process of processing a deep hole with a onesided drill is considered. The technique of conditional division of the cutting zone into 20 annular layers was used, for each of which the process parameters were calculated by the method of successive approximation. A formula is obtained for evaluating the wear chamfer of the cutting part, taking into account the energy expended, tool parameters and the duration of processing. Keywords: drilling, hole, cutting tool, cutting edge, power, wear, temperature. [email protected]

Electrical Current at Metal Cutting Process: A Literature Review

2015 ◽  
Vol 808 ◽  
pp. 40-47 ◽  
Author(s):  
Raluca Daicu ◽  
Gheorghe Oancea
Keyword(s):  
Literature Review ◽  
Cutting Forces ◽  
Metal Cutting ◽  
Electrical Current ◽  
Cutting Edge ◽  
Cutting Process ◽  
Metallic Materials ◽  
Cutting Zone

Processing metallic materials by cutting using good electricity conductor cutting edges it appears an electrical current due mainly to the temperature in the cutting zone. Analyzing of the electrical current the information about the unfolding mode of the cutting process can be obtained. The cutting electrical current can be used in several applications: the estimation of the temperature in the cutting zone, the estimation of the cutting forces, the identification of the wear state of the cutting edge etc. The first researches were started in Russia and they were based on the utilization of the cutting electrical current to measure the temperature in the cutting zone. Afterwards, other applications were identified in the literature and the researches were extended in other countries like India, Japan, USA, Brazil, France, Bangladesh and Romania. This paper presents a review of the researches about the electrical current which appears at cutting process.

Experimental research on the deep-hole boring of pure niobium tube

2020 ◽  
Vol 234 (8) ◽  
pp. 1124-1132
Author(s):  
Xiaolan Han ◽  
Zhanfeng Liu ◽  
Yazhou Feng
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Experimental Research ◽  
Process Parameters ◽  
Cutting Tool ◽  
Geometric Parameters ◽  
Deep Hole ◽  
High Quality ◽  
Pure Niobium ◽  
Hole Axis

In the deep-hole boring process on pure niobium tube, there exist some problems including serious tool wear, tough chips, and poor surface quality. In order to bore high-quality deep holes on rolled niobium tube, the cutting tool structure and boring process parameters suitable for machining rolled niobium tube were designed and two experimental schemes were proposed. The results showed that the geometric parameters of the cutting tool and process parameters have important influences on the tool wear, chip morphologies, hole-axis deflection, and hole surface roughness. By adjusting the geometric parameters of the cutting tool and boring process parameters, reasonable geometric parameters of the cutting tool and boring process parameters were obtained.

scholarly journals Development of Combined Cutting Process using Water-Cooled Cutting Tool

2020 ◽  
Vol 9 (3) ◽  
pp. 329-332
Keyword(s):  
Heat Sink ◽  
High Performance ◽  
Cutting Tool ◽  
Cutting Edge ◽  
Cutting Process ◽  
Hard Materials ◽  
Cutting Zone

Technological aspects of the process of turning shafts with heating of their surfaces to temperatures below recrystallization point and simultaneous improvement of the heat sink from the cutting zone, as well as increasing stability of the cutting edge of a tool. A constructive diagram of the tool device has been developed, which allows for high-performance machining with a given quality of the surfaces of parts from hard materials on lathe equipment.

scholarly journals Influence of machining conditions on friction in metal cutting process – A review

Mechanik ◽  
2019 ◽  
Vol 92 (4) ◽  
pp. 242-248
Author(s):  
Wit Grzesik ◽  
Joel Rech
Keyword(s):  
Tool Wear ◽  
Contact Zone ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Sliding Velocity ◽  
Contact Conditions ◽  
Tool Materials ◽  
Cutting Zone ◽  
Cooling Media ◽  
Cutting Tool Materials

This paper presents a range of variable machining factors which influence substantially friction directly or by the tool wear developed in the cutting zone. The group of direct factors include the workpiece and cutting tool materials coupled, the cutting/sliding velocity, cooling media supplied to the tool-chip contact zone, modification of the tool contact faces by micro-texturing. Special attention was paid to the tool wear evolution and its pronounced effect on changes of the contact conditions.

A Numerical Study to Investigate the Influence of Edge Preparation in Vibration Assisted Machining

2018 ◽  
Author(s):  
Salman Pervaiz ◽  
Sathish Kannan ◽  
Wael Abdel Samad
Keyword(s):  
Cutting Forces ◽  
Small Amplitude ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Numerical Study ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Internal Stresses ◽  
Machining Performance ◽  
Edge Preparation

In machining operation, cutting tool performs a central role towards the overall machining performance. A user from metal cutting community always look for better cutting tools that can enhance productivity by reducing tool wear and cost. Modification in the micro-geometry of cutting edge is termed as edge preparation, and it is performed to improve the machining performance by strengthening the cutting edge, reducing internal stresses of coating and lowering the edge chipping etc. Edge preparation has a controlling influence on the formation of deformation zones, cutting temperature, cutting forces and stresses at the cutting interface. Vibration assisted machining (VAM) concept is gaining fame in the metal cutting sector community for machining difficult-to-machine materials. In VAM, cutting tool moves with a small amplitude vibration instead of moving with a constant cutting velocity. This small amplitude vibrational movement provides better machining performance for difficult-to-cut brittle materials. The current numerical study utilized different edge prepared micro-geometries such as sharp edge, round edge and chamfer edge etc. cutting tools, and then these cutting tools were used in the numerical simulations of VAM. The study shows higher magnitude of cutting forces under VAM with tools with modified geometry. The study is beneficial for the metal cutting community and opens new areas of industrial applications.

Edge Forces in Metal Cutting: Fundamental Analysis and Experimental Verification

2020 ◽  
Author(s):  
Rimah S. Al Aridi ◽  
Ahmad M. R. Baydoun ◽  
Ramsey F. Hamade
Keyword(s):  
Experimental Verification ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Cutting Edge ◽  
Micro Machining ◽  
Cutting Edge Radius ◽  
Edge Radius ◽  
Geometric Factors ◽  
Tool Cutting

Abstract In metal cutting, some of the generated forces do not contribute to chip formation. These forces are referred to as plowing forces and are induced mainly as result of the finite sharpness of the tool (cutting edge radius) and the tool’s land (flank). Determining the magnitude of these forces is essential to developing a better understanding of the mechanics and physics of applications that involve cutting at minimal feed values (e.g., micro-machining and vibration-assisted-micro-machining. It is well recognized that plowing forces increase with tool wear. This research estimates these forces by employing analytical and numerical simulations. An extensive experimental analysis is utilized to verify the simulated values of the plowing forces. The experimental verification is designed to measure these forces as a function of several cutting parameters. The developed methodology relates the plowing forces to geometric factors and process parameters such as cutting-edge radius, tool feed, and cutting speed.

Basic Mechanics of the Metal-Cutting Process

1944 ◽  
Vol 11 (3) ◽  
pp. A168-A175 ◽  
Author(s):  
M. Eugene Merchant
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Orthogonal Cutting ◽  
Cutting Edge ◽  
Cutting Process ◽  
Work Piece ◽  
Machining Operations ◽  
Work Done ◽  
Metal Work

Abstract The author presents a mathematical analysis of the geometry and mechanics of the metal-cutting process, covering two common types of geometry which occur in cutting. This analysis offers a key for the study of engineering problems in the field of metal cutting in terms of such fundamental quantities as strain, rate of shear, friction between chip and tool, shear strength of the metal, work done in shearing the metal and in overcoming friction, etc. The two cases covered are, in essence, that of a straight-edged cutting tool moving relative to the work-piece in a direction perpendicular to its cutting edge, termed “orthogonal cutting,” and that of a similar cutting tool so set that the cutting edge is oblique to the direction of relative motion of tool and work, termed “oblique cutting.” Equations are developed which permit the calculation of such quantities as those just enumerated from readily observable values. The theoretical findings are particularly applicable and significant in the case of present-day high-speed machining operations with sintered-carbide tools.

Edge Design for Regrinding Cutting Tool

2011 ◽  
Vol 101-102 ◽  
pp. 938-941
Author(s):  
Xin Li Tian ◽  
Hao Wang ◽  
Xiu Jian Tang ◽  
Zhao Li ◽  
Ai Bing Yu
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Cutting Edge ◽  
Edge Angle ◽  
Edge Radius ◽  
Tool Edge ◽  
Edge Defects ◽  
Tool Cutting ◽  
Edge Preparation

Regrinding of wasted cutting tools can recycle resources and decrease manufacturing costs. Influence of relative tool sharpness and tool cutting edge angle on tool edge radius were analyzed. Cutting force and cutting temperature were simulated with FEM on different edge radius. Edge preparation experiments were carried out though an abrasive nylon brushing method. The results show that RTS and cutting edge angle have influence on edge radius. Small edge radius might result in small cutting forces and lower average temperatures, could maintain the cutting state between tool and workpiece. The cutting edge defects can be eliminated through edge preparation, and a smooth cutting edge can be obtained. Cutting tool life will be improved through proper edge design and edge preparation.

Adhesion in metal cutting: a study in the SEM

1978 ◽  
Vol 36 (1) ◽  
pp. 586-587
Author(s):  
V.M. Silva ◽  
E.D. Doyle
Keyword(s):  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Edge ◽  
Rake Face ◽  
Additional Insight ◽  
Forming Process ◽  
Chip Surface ◽  
Intimate Contact ◽  
Dynamic Events ◽  
Insight Into

In a recent review of friction in metal cutting Bailey (1) claimed that it was now almost universally accepted that there was seizure or sticking contact between the chip and the tool in the immediate vicinity of the cutting edge, as indicated schematically in Fig. 1. This conclusion is rationalised on the basis that the sliding contact involves the continual generation of an uncontaminated chip surface at the cutting edge and that there is intimate contact between the chip and tool because of the high normal pressures on the rake face. However, recent work by Home et al. (2) using a transparent sapphire tool, revealed that the chip moves up the rake face of the cutting tool with no apparent seizure contact in the region of the cutting edge. In order to provide additional insight into this problem we have video-recorded the dynamic events in machining by carrying out the chip forming process within the evacuated chamber of the scanning electron microscope.

scholarly journals A Review of Indirect Tool Condition Monitoring Systems and Decision-Making Methods in Turning: Critical Analysis and Trends

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 108
Author(s):  
Mustafa Kuntoğlu ◽  
Abdullah Aslan ◽  
Danil Yurievich Pimenov ◽  
Üsame Ali Usca ◽  
Emin Salur ◽  
...  
Keyword(s):  
Tool Wear ◽  
Condition Monitoring ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Complex Structure ◽  
Tool Condition Monitoring ◽  
Monitoring Systems ◽  
Tool Condition ◽  
Condition Monitoring Systems ◽  
Cutting Zone

The complex structure of turning aggravates obtaining the desired results in terms of tool wear and surface roughness. The existence of high temperature and pressure make difficult to reach and observe the cutting area. In-direct tool condition, monitoring systems provide tracking the condition of cutting tool via several released or converted energy types, namely, heat, acoustic emission, vibration, cutting forces and motor current. Tool wear inevitably progresses during metal cutting and has a relationship with these energy types. Indirect tool condition monitoring systems use sensors situated around the cutting area to state the wear condition of the cutting tool without intervention to cutting zone. In this study, sensors mostly used in indirect tool condition monitoring systems and their correlations between tool wear are reviewed to summarize the literature survey in this field for the last two decades. The reviews about tool condition monitoring systems in turning are very limited, and relationship between measured variables such as tool wear and vibration require a detailed analysis. In this work, the main aim is to discuss the effect of sensorial data on tool wear by considering previous published papers. As a computer aided electronic and mechanical support system, tool condition monitoring paves the way for machining industry and the future and development of Industry 4.0.

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