Chip structure classification based on mechanics of its formation

Astakhov, Viktor P.; Shvets, Stanislav Volodymyrovych; Osman, M. O. M.

doi:10.1016/s0924-0136(97)00081-2

Cited by 57 publications

(21 citation statements)

References 19 publications

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“…and attempted to relate process characteristics and stability of cutting to the various chip shapes observed during hard turning [9,10,[12][13][14][15][16][17][18][19]. Other researchers have investigated composition, temperatures and wear characteristics of CBN cutting tools [1,8,[20][21][22]28] and the effects of work material properties, tool geometry and cutting conditions on surface integrity of the finish-machined parts [23][24][25][26][27][28].…”

mentioning

confidence: 99%

Effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and forces in finish turning of hardened AISI H13 steel

Özel

Hsu

Zeren

2004

Int J Adv Manuf Technol

292

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In this study, the effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and resultant forces in the finish hard turning of AISI H13 steel were experimentally investigated. Cubic boron nitrite inserts with two distinct edge preparations and throughhardened AISI H13 steel bars were used. Four-factor (hardness, edge geometry, feed rate and cutting speed) two-level fractional experiments were conducted and statistical analysis of variance was performed. During hard turning experiments, three components of tool forces and roughness of the machined surface were measured. This study shows that the effects of workpiece hardness, cutting edge geometry, feed rate and cutting speed on surface roughness are statistically significant. The effects of twofactor interactions of the edge geometry and the workpiece hardness, the edge geometry and the feed rate, and the cutting speed and feed rate also appeared to be important. Especially honed edge geometry and lower workpiece surface hardness resulted in better surface roughness. Cutting-edge geometry, workpiece hardness and cutting speed are found to be affecting force components. The lower workpiece surface hardness and honed edge geometry resulted in lower tangential and radial forces.

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mentioning

confidence: 99%

Effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and forces in finish turning of hardened AISI H13 steel

Özel

Hsu

Zeren

2004

Int J Adv Manuf Technol

292

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“…Further, it is also observed that the average area of crater wear is of about 2.25mm 2 . Analysis of rake face of plain tungsten carbide cutting tools revealed that the consolidated wear zones on the rake face are located at a distance of 200-500 µm from the side and end cutting edges and 1400 µm from nose [2]. So, it is planned to machine micro-grooves within the specified wear zones on the rake face using sinker EDM as shown in Fig.…”

Section: Micro-grooves Machining On the Rake Face Using Sinker Edmmentioning

confidence: 99%

“…Authors have proposed a new technique to classify the chips based on chip structure, chip stress and strains as a result of chip formation dynamics. This technique can be used to predict the chip breakability [2]. Miroslav Neslusan et al (2011) analyzed the chip formation in machining of annealed and hardened roll bearing steel through acoustic emission technique.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study & Optimization of Machining Parameters in Turning of AISI 1040 Steel with Micro-grooved WC Cutting Tools

Pavani¹,

Prasad²,

Ramji³

2017

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Abstract. In dry turning, control over chip formation and the need for the automated machining lead to an advancement in cutting tools. Such concern towards chip breakability is necessary in reducing tool wear, tool tip temperatures and surface roughness of workpiece material. The present study proposes a new development in the traditionally available cutting tools, which acts like a chip breaker. A series of micro-grooves are machined on the rake face of Tungsten carbide (WC) cutting tools using sinker Electric Discharge Machine (EDM). These micro-grooved tools are used to dissolve long continuous chips and heat from the cutting zone in the dry machining of AISI 1040 steel. The results of micro-grooved cutting tools have shown improvement in reducing the tool tip temperatures and surface roughness compared to the conventional cutting tools. The consolidated chip flow phenomenon of plain WC tools is used to decide the location of micro-grooves on the tool rake face. A Taguchi orthogonal array is used to design an experimental layout with minimum number of repetitions in the experiments. Signal-tonoise ratios and ANOVA is used to understand and identify the significant factors & their level among the input variables on responses.From the results, it is identified that the cutting speed is the most influencing parameter for tool tip temperature at level 1 (i.e.112 m/min) and surface roughness at level 5(i.e.720 m/min).

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“…Moreover, the chip formations can show some variations due to the workpiece material and operation parameters such as cutting speed, feed rate or depth of cut. 12 For instance, when a regular broken chip or an irregular broken chip is formed on a workpiece with elastic properties, no chip breakers should be provided. Similarly, a workpiece material with elastoplastic properties produces a continuous fragmentary chip or a continuous chip with a wedge-shaped texture, and if the workpiece has plastic properties then the result is a continuous type of chip.…”

Section: Chip Formationmentioning

confidence: 99%

“…Similarly, a workpiece material with elastoplastic properties produces a continuous fragmentary chip or a continuous chip with a wedge-shaped texture, and if the workpiece has plastic properties then the result is a continuous type of chip. 12 Long chips are usually not desirable because they can tangle along the drill body and have to be removed manually. 13 Instead, well broken chips are associated with a smooth drilling process.…”

Section: Chip Formationmentioning

confidence: 99%

Effect of the TiBN coating on a HSS drill when drilling the MA8M Mg alloy

Karaca¹,

Aksakal²

2016

Mater. Tehnol.

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Mg alloy MA8M is used in the aerospace and food industries and in biomedical applications due to its lightness and biocompatibility. This paper presents the drilling performance of the standard HSS and TiBN-coated drill bits during the machining of the MA8M Mg alloy at various drill rotational speeds and feed rates. After the experiments, the surface roughness, topography and chip formation were analyzed. Atomic-force microscopy (AFM) and surface profilometer were used for this purpose. It was observed that higher drilling feed rates and drill rotational speeds lead to lower surface-roughness values. TiBN-coated drill bits exhibited undesired surface qualities. Keywords: MA8M Mg alloy, TiBN coating, twist drills, surface quality, multiple regression analysis, chip formation Mg zlitina MA8M se uporablja v letalstvu, prehrambeni industriji in v biomedicini, ker je lahka in biokompatibilna.^lanek predstavlja obna{anje pri vrtanju z normalnimi HSS in s svedri s TiBN prevleko na konici, pri obdelavi Mg zlitine MA8M pri razli~nih vrtljajih svedra in hitrostih podajanja. Po eksperimentih je bila analizirana hrapavost povr{ine, topografija in nastanek ostru`ka. V ta namen sta bila uporabljena mikroskop na atomsko silo (AFM) in profilometer povr{ine. Ugotovljeno je, da ve~ja hitrost podajanja in vrtenja svedra povzro~i manj{o hrapavost povr{ine. S TiBN prevle~eni svedri so povzro~ali neustrezno kvaliteto povr{ine. Klju~ne besede: MA8M Mg zlitina, TiBN prevleka, vija~ni svedri, kvaliteta povr{ine, multipla regresijska analiza, nastanek ostru`ka

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Chip structure classification based on mechanics of its formation

Cited by 57 publications

References 19 publications

Effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and forces in finish turning of hardened AISI H13 steel

Effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and forces in finish turning of hardened AISI H13 steel

Experimental Study & Optimization of Machining Parameters in Turning of AISI 1040 Steel with Micro-grooved WC Cutting Tools

Effect of the TiBN coating on a HSS drill when drilling the MA8M Mg alloy

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