An analysis of cutting tools with negative side cutting edge angles

Venkatesh, V.C.; Kattan, I.A.; Hoy, D.E.P.; Ye, C.T.; Vankirk, J.S.

doi:10.1016/0924-0136(95)02207-4

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…The chip samples collected while turning the steels by the diVerent inserts of con®guration SNMG and SNMM at diVerent V c ±S 0 combinations under both dry and cryogenic cooling conditions have been visually examined and categorized with respect to their shape and colour. Characterization of chip colour, oxide analysis and temperature evaluation has earlier been reported using image processing systems [27,28]. The results of such categorization of the chips produced at diVerent conditions and environments by AISI 1040 steel at lower feeds (0.12 and 0.16 mm/rev) and higher feeds (0.20 and 0.24 mm/rev) are shown in Table 2 (a) and (b) respectively.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 97%

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The effects of cryogenic cooling on chips and cutting forces in turning AISI 1040 and AISI 4320 steels

Dhar¹,

Kishore²,

Paul

et al. 2002

Proceedings of the Institution of Mechanical Engineers, Part B:

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Application of conventional cutting fluids often cannot control the high cutting temperatures, especially in high production machining. In addition, they are a major source of pollution in machining industries. Cryogenic cooling is a potential environmentally friendly clean technology for desirable control of the cutting temperature. The present work deals with experimental investigations on the role of cryogenic cooling by liquid nitrogen jets on chip formation and cutting forces in turning AISI 1040 steel and AISI 4320 steel at industrial speed—feed combinations by two types of carbide inserts of different geometrical configurations. The experimental results indicate the possibility of a substantial reduction in cutting forces by cryogenic cooling, which enabled a reduction in cutting forces by favourable chip formation, chip—tool interaction and also retention of tool sharpness due to reduced cutting temperature. Thus cryogenic cooling, if properly employed, is not only environmentally friendly but can also improve machinability characteristics.

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Section: Experimental Procedures and Resultsmentioning

confidence: 97%

“…Earlier workers [27] have studied the eVect of the principal cutting edge angle on the machining temperature and product quality. The results indicate that with a principal cutting edge angle of 95 , good roughness and roundness values are obtained despite high friction and high temperature.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

The effects of cryogenic cooling on chips and cutting forces in turning AISI 1040 and AISI 4320 steels

Dhar¹,

Kishore²,

Paul

et al. 2002

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Indeed, the nose of the tool was engaged during the tests and the measured forces are studied in the measurement basis. Some changes have been observed in the chip morphology when changing r  [10][11]13]. However, the experimental work presented in this paper suggests an explanation, detailed in the following sections, based on the contact between the clearance face and the machined surface.…”

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confidence: 81%

“…The effect of the side cutting edge angle (SCEA, equal to 90 r    ) has been yet experimentally studied [9][10][11][12]. Unfortunately, the ranges of variations of r  are close to 90  (except in [9]).…”

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confidence: 99%

Improvement of Cutting Forces Modeling Based on Oriented Cutting Tests

et al. 2013

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International audienceIn order to predict the characteristics of the machined part, such as geometry, surface roughness and fatigue or corrosion resistance, the cutting forces values should be known as precisely as possible. The edge discretisation methodology can be used to model the three components of the cutting forces. The results are generally considered as suitable, even if the considered cutting operation is complex, because the geometry is well described. Usually, the local cutting forces model is identified from orthogonal or oblique cutting tests and the local contributions are assumed to be independent of the orientation of the elementary edge in the reference plane Pr. However, when turning in the tool nose or with round inserts, the tool cutting edge angle Kr (or Side Cutting Edge Angle) evolves along the active cutting edge and the values of this angle are very small compared to that of 90° used in orthogonal/oblique cutting. For this study, a new elementary cutting operation, called "oriented cutting", has been tested. In this configuration, the active cutting edge is rectilinear, without inclination, but oriented by an angle Kr different from 90°. In addition, cylindrical turning tests have been done. The measurements, performed in pure copper, show an influence of the tool cutting edge angle on the cutting forces. An interaction between Kr and the workpiece radius is also highlighted

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“…Nevertheless, as pointed out by Campocasso et al [26], the contact radius and the cutting edge lead angle κ r are geometrically associated. This may be the reason why earlier studies developed by Venkatesh et al [28], Saglam et al [29] or Khettabi et al [30] had difficulties in concluding about the effect of the cutting edge lead angle κ r on cutting forces. Consequently, the influence of the cutting edge lead angle κ r and the effect of contact radius on cutting forces have to be investigated separately.…”

Section: Introductionmentioning

confidence: 99%

Generalised cutting force model including contact radius effect for turning operations on Ti6Al4V titanium alloy

Dorlin

Fromentin

Costes

2016

Int J Adv Manuf Technol

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Current constraints on aeronautical parts have led to the introduction of materials like titanium alloys as well as new part geometries featuring large dimensions and reduced thickness. Inappropriate cutting forces during turning operations could lead to high deflections and damage to the machine. In order to ensure the respect of final part geometry and the optimal use of resources, cutting forces have to be known, to anticipate the deformed shape during and after machining operations on thin parts. Current models are offering a solution which can be optimised by the modelling influence of the ploughing effect on cutting forces. Therefore, a mechanistic model is developed in order to improve the prediction of cutting forces during turning operations on titanium alloy Ti6Al4V: this model includes the effect of the clearance face contact radius and comprises two main steps. First, the effect of the clearance contact radius and the effect of the cutting edge lead angle are determined independently, via a direct identification method based on elementary cutting tests. Secondly, this analysis is extended to cutting trials in boring, cylindrical turning and face turning. Then, based on a mechanistic approach, a model is defined according to the previous results and the coefficients are identified thanks to cutting trials in real conditions. The results of the proposed model are then compared to a commonly used model which takes into account mostly the uncut chip thickness effect. It is demonstrated that the proposed cutting force model provides a more accurate prediction of cutting forces.

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An analysis of cutting tools with negative side cutting edge angles

Cited by 7 publications

References 3 publications

The effects of cryogenic cooling on chips and cutting forces in turning AISI 1040 and AISI 4320 steels

The effects of cryogenic cooling on chips and cutting forces in turning AISI 1040 and AISI 4320 steels

Improvement of Cutting Forces Modeling Based on Oriented Cutting Tests

Generalised cutting force model including contact radius effect for turning operations on Ti6Al4V titanium alloy

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