Measurement and analysis of temperature, thrust force and surface roughness in drilling of AA (6351)-B 4 C composite

Samy, Ghada; Kumaran, S. Thirumalai

doi:10.1016/j.measurement.2017.02.016

Cited by 50 publications

(19 citation statements)

References 19 publications

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“…The temperature increases with increase in spindle speed from 250 rpm to 450 rpm. It is due to the high contact area [12]. It is evident that heat flow in the bit and rock are increased due to clogging of dust and chips in between the interface, also more frictional force and shearing energy between the bit-rock interfaces, hence the drilling temperature increases.…”

Section: Influence Of Penetration Rate On Temperaturementioning

confidence: 99%

Experimental investigation and statistical analysis of operational parameters on temperature rise in rock drilling

Shankar¹,

Kunar²,

Murthy³

2018

IJHT

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Heat generated during rock drilling, due to friction at the bit-rock interface. Due to which temperature increases, which can influence the thermal stress and subsequent rock failure. In this paper, an attempt is made to present results related to the temperature assessment during rotary drilling of rocks on medium-grained sandstone under controlled laboratory conditions. The experiments were conducted by using embedded thermocouple technique, the thermocouple was placed at a distance of 0.5mm (horizontal) from the bit-rock interface. The influence of operational parameters, i.e., the diameter of the drill bit, spindle speed and rate of penetration of rise in temperature was studied using multiple regression and data analysis was carried out using analysis of variance (ANOVA). The temperature was measured by using embedded thermocouple technique at a depth of 6mm, 14mm, 22mm and 30mm respectively. Regression models were developed for the prediction of temperature at the bitrock interface. It was observed that the increase in temperature for medium-grained sandstone was from 49 0 C to 74 0 C (51.08%) with an increase in the diameter of the drill bit, spindle speed and rate of penetration.

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Section: Influence Of Penetration Rate On Temperaturementioning

confidence: 99%

Experimental investigation and statistical analysis of operational parameters on temperature rise in rock drilling

Shankar¹,

Kunar²,

Murthy³

2018

IJHT

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“…Drilling of low carbon steel has shown to have some significant thermal effects on the material after the drilling operation [16]. Surface temperature of low carbon steel increases as the drilling speed increases often causing the induction of residual stress in the material [35] [36] [19]. The drilling mostly result to the material cracks [20] it was concluded that significant improvement in both productivity and product quality and hence overall machining economy offsetting the cost of cryogenic cooling [21].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Effects on the Drilling Operation of Low Carbon Steel

Adedeji¹,

Raji²,

Fadipe³

et al. 2019

ETRJ

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The effects of drilling parameters, drill speed and feed rate on the twist drill bit temperature in drilling of low carbon steel material with and without the use of coolant at different point angles is experimentally investigated. The drill bit temperature was recorded during the drilling experiment. The Feed rate and spindle speed are varied as per L14 orthogonal array. The experiments were conducted by using High Speed Steel (HSS) drills having 82°, 100° and 118° drill point angles respectively. Analysis of temperature on the drilling parameters concluded that, the drilling temperature of the specimen increases with increase in both cutting speed and feed rate. This work thoroughly construes that 118° drill point angle produced the highest drilling temperature during the specimen drilling. Thus in order to reduce the thermal effects during machining of the specimen, the 82° drill point angle should be used.

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“…However, at medium spindle speeds, the breakup chips, and sequential short helical chip forms are converted into long helical chips. 3 The chip thickness is highly variable along the length of the cutting edge and during the tool revolution in the workpiece. 15 Therefore, the form of the chip structure changes from ductile to brittle with increasing cutting parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3(b), the area of |C 1 C 1 1 -A 1 A 1 1 | rectangle represents the undeformed chip in drilling processes, in which the samples are not pre-drilled. This can be calculated depending on the depth (h D ) and width of the chip (b D ), as shown in equation(3). (h D ) which is the chip thickness per flute in one revolution of the drill…”

mentioning

confidence: 99%

An experimental investigation of the effects of point angle on the high-speed steel drills performance in drilling

Demir

2018

Measurement and Control

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The differences in the cutting speed are a serious problem along the cutting edge of the drill, in drilling operations. This problem can partly be solved reducing the length of the cutting edge via changing the drill point angle. In addition, in this study, the effect of point angle, feed rate, and cutting speed on drilling is investigated. For identifying the optimum cutting parameters, AISI 1050 steel alloy was selected as the experimental specimen, these specimen were pre-drilled 5 mm in diameter due to eliminating the effect of the chisel edge. In the experiments, the holes were drilled only at a depth of 10 mm in order not to give any harm to the dynamometer while measuring thrust force. For this aim, in drilling process, drills with point angle of 100°, 118°, 136°, 154°, and 172° were selected. In conclusion, the thrust force, the tool wear, and the surface roughness linearly decreased with increasing point angles due to less removal chip area, in per revolve of the tool. However, the thrust force, the tool wear, and the surface roughness were adversely affected at higher feed rates and lower cutting speeds. The hole dimensional accuracy decreased at lower feed rates and cutting speeds but at higher point angles and concurrently at higher feed rates but lower point angles and cutting speeds. However, the hole dimensional accuracy showed more decisiveness at 118° than other point angles, while the highest dimensional accuracy values recorded at 136° point angle, at higher cutting speeds.

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Measurement and analysis of temperature, thrust force and surface roughness in drilling of AA (6351)-B 4 C composite

Cited by 50 publications

References 19 publications

Experimental investigation and statistical analysis of operational parameters on temperature rise in rock drilling

Experimental investigation and statistical analysis of operational parameters on temperature rise in rock drilling

Experimental Investigation of Thermal Effects on the Drilling Operation of Low Carbon Steel

An experimental investigation of the effects of point angle on the high-speed steel drills performance in drilling

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