Measurement of Temperature Distribution Within Tool Using Powders of Constant Melting Point

1976 ◽  
Vol 98 (2) ◽  
pp. 607-613 ◽  
Author(s):  
S. Kato ◽  
K. Yamaguchi ◽  
Y. Watanabe ◽  
Y. Hiraiwa
Keyword(s):  
Temperature Distribution ◽  
Melting Point ◽  
Boundary Line ◽  
Heat Distribution ◽  
Rake Face ◽  
Tool Temperature ◽  
Fine Powders ◽  
Temperature Distributions ◽  
Tool Surface

A method was developed to measure tool temperature distribution within the tool by means of fine powders that have a constant melting point. The method involves observation of the boundary line formed by melted and unmelted powder scattered on the tool surface. It is clarified that temperature distribution within the tool is easily and accurately measured in this manner. Temperature distributions were compared with results obtained from analyses based on Loewen and Shaw’s theory, modified on the assumption that heat distribution due to friction along the rake face is not uniform but, rather, like real frictional distribution in cutting, and the fraction of heat flowing into the tool varies along the rake face.

scholarly journals Measurement of Temperature Distribution of Cutting Tool by Fine Powders Having Constant Melting Point

1975 ◽  
Vol 41 (341) ◽  
pp. 343-350
Author(s):  
Shinobu KATO ◽  
Katsumi YAMAGUCHI ◽  
Yoichi WATANABE ◽  
Yasuhiko HIRAIWA
Keyword(s):  
Temperature Distribution ◽  
Melting Point ◽  
Cutting Tool ◽  
Fine Powders

Effect of Rake Face Design on Cutting Tool Temperature Distributions

1980 ◽  
Vol 102 (2) ◽  
pp. 123-128 ◽  
Author(s):  
P. K. Wright ◽  
S. P. McCormick ◽  
T. R. Miller
Keyword(s):  
Temperature Distribution ◽  
Cutting Tool ◽  
Contact Length ◽  
Measured Temperature ◽  
Rake Face ◽  
Low Carbon ◽  
Temperature Distributions ◽  
Metallographic Method ◽  
Carbon Iron ◽  
Good Agreement

Turning experiments have been carried out on a low carbon iron using steel tools of different side rake face geometry. Temperature distributions have been determined using a recently developed metallographic method. It has been found that when using tools which have a controlled chip-tool contact length of 0.5 mm. the temperatures are ∼30 per cent lower than when using conventional, 6 deg rake tools and, as a result, tool life is longer. Theoretical equations are described which allow the calculation of the temperature distribution along the chip tool interface and the tribological conditions in this region are also considered in detail. There is good agreement between the calculated and measured temperature distributions.

Temperaturverteilung beim Wälzschälen/Temperature distribution during power skiving

2021 ◽  
Vol 111 (11-12) ◽  
pp. 786-791
Author(s):  
Florian Sauer ◽  
Michael Gerstenmeyer ◽  
Volker Schulze
Keyword(s):  
Temperature Distribution ◽  
Wear Mechanisms ◽  
Experimental Temperature ◽  
Heat Distribution ◽  
Temperature Analysis ◽  
Power Skiving ◽  
Underlying Mechanisms

Innenverzahnungen, die aufgrund der Elektromobilität zunehmend im Fokus stehen, lassen sich mithilfe des Wälzschälens produktiv herstellen. Um diese Produktivität weiter zu steigern, müssen die wirkenden Verschleißmechanismen untersucht und verstanden werden. Der Beitrag behandelt die experimentelle Temperaturuntersuchung des Wälzschälens mit anschließender Modellierung der Wärmeverteilung, welche als erster Schritt zum Mechanismenverständnis angesehen werden kann.   Internal gears, which are increasingly in focus due to electromobility, can be manufactured productively with the help of power skiving. In order to further increase the productivity, the wear mechanisms have to be investigated and understood. This paper discusses the experimental temperature analysis of power skiving by subsequently modelling the heat distribution. This process can be seen as a first step towards understanding the underlying mechanisms.

The Transient Temperature Distribution in a Slab Subject to Thermal Radiation

1965 ◽  
Vol 87 (1) ◽  
pp. 117-130 ◽  
Author(s):  
R. D. Zerkle ◽  
J. Edward Sunderland
Keyword(s):  
Temperature Distribution ◽  
Thermal Radiation ◽  
Radiant Heat ◽  
Analog Computer ◽  
Graphical Form ◽  
Transient Temperature ◽  
Transient Temperature Distribution ◽  
Temperature Distributions ◽  
Approximate Analytical Solutions ◽  
Wide Range

The transient, one-dimensional temperature distribution is determined for a slab, insulated on one face, and subjected to thermal radiation at the other face. The slab is initially at a uniform temperature and is assumed to be homogeneous, isotropic, and opaque; the physical properties are assumed to be independent of temperature. Transient temperature distributions for both heating and cooling situations are obtained by means of a thermal-electrical analog computer. A diode limiter circuit is used to simulate the nonlinear radiant heat flux. The transient temperature distributions are presented in a dimensionless, graphical form for a wide range of variables. Approximate analytical solutions are also given which complement and extend the solution charts over ranges of parameters not covered in the charts.

scholarly journals Influence of Burner Position on Temperature Distribution in Soybean Flaming

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 391 ◽  
Author(s):  
Miloš Rajković ◽  
Goran Malidža ◽  
Strahinja Stepanović ◽  
Marko Kostić ◽  
Kristina Petrović ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Dry Matter ◽  
Growth Stage ◽  
Flame Temperature ◽  
Soil Surface ◽  
High Variability ◽  
Temperature Distributions ◽  
Soybean Canopy ◽  
Soybean Plants ◽  
Surface Flame

The main objective of this study was to identify optimal burner orientation for a newly designed flame cultivator by quantifying the flame temperature distributions of cross, back, and parallel position of burners at different heights of the soybean canopy (distance from the soil surface). Flame temperatures were measured within-row for three burner orientations at seven propane doses (20–100 kg/ha) and eight different canopy heights (0–18 cm above soil surface). Soybean plants in V3 growth stage were flamed with the same doses and burner orientations, and 28 days after treatment (DAT) crop injury (0%–100%), plant height (cm), dry matter (g) and grain yield (t/ha) were assessed. All three burner orientations had high flame temperatures at lower canopy heights (<6 cm high) that gradually decreased with increasing canopy height (6–18 cm). Measured temperatures ranged from 33 to 234 ℃ for cross flaming, 29 to 269 ℃ for back flaming and 23 to 155 ℃ for parallel flaming, with high variability in temperature patterns. Back flaming generated flame temperatures above 100℃ at a lower propane dose (27 kg/ha) compared to cross and parallel flaming (40 and 50 kg/ha). For all tested parameters, parallel and cross flaming had better impact on soybeans than back flaming, but for weed control in crop rows, cross flaming is recommended.

Examination of Oscillating Frequencies Generated by Combustion Oscillation Considering Temperature Distribution in a Combustor Tube Fueled by Natural Gas and Hydrogen Mixture

2020 ◽  
Author(s):  
Akane Uemichi ◽  
Kan Mitani ◽  
Yudai Yamasaki ◽  
Shigehiko Kaneko
Keyword(s):  
Temperature Distribution ◽  
Natural Gas ◽  
Transfer Matrix ◽  
Fuel Mixture ◽  
One Dimensional ◽  
Temperature Distributions ◽  
Combustion Oscillation ◽  
The Town ◽  
Small Elements ◽  
Oscillation Experiment

Abstract A combustion oscillation experiment fueling a mixture of hydrogen and natural gas was performed. The results showed oscillating frequencies of around 350 Hz in the case of the town gas only, whereas oscillating frequencies of around 200 and 400 Hz were observed in the hydrogen-containing fuel case. We hypothesized that the oscillating frequencies shift may occur by changing the temperature-distribution inside the tube, which was caused by different combustion conditions with the fuel mixture. As a result, the possible oscillating frequencies of not only around 350 Hz but also around 200 and 400 Hz were obtained. Although three types of possible oscillating frequencies were obtained in our previous study, more detailed temperature distributions should be considered to clarify the effect of the changing fuel mixture composition. In this paper, representative one-dimensional temperature distributions were formed by the combination of measured and calculated temperature distributions in the combustion tube for the corresponding fuel mixture. To include the detailed temperature distributions, the acoustic network model was divided into enough small elements to express the temperature distributions, where each element was connected by the transfer matrix. Then, the possible oscillating frequencies were calculated, taking account of the influence of the temperature distributions.

scholarly journals Tool temperature distribution in modulation-assisted machining

2018 ◽  
Vol 26 ◽  
pp. 656-662
Author(s):  
Arvind Natarajan ◽  
Viswanathan Madhavan ◽  
Wilfredo Moscoso-Kingsley
Keyword(s):  
Temperature Distribution ◽  
Tool Temperature

scholarly journals Thermal Modeling of Tool Temperature Distribution during High Pressure Coolant Assisted Turning of Inconel 718

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 408 ◽  
Author(s):  
Doriana D'Addona ◽  
Sunil Raykar
Keyword(s):  
High Pressure ◽  
Temperature Distribution ◽  
Inconel 718 ◽  
Tool Temperature ◽  
Machining Processes ◽  
Nickel Chromium ◽  
Work Material ◽  
Cutting Zone ◽  
Overall Performance ◽  
High Pressure Coolant

This paper presents a finite-element modeling (FEM) of tool temperature distribution during high pressure coolant assisted turning of Inconel 718, which belongs to the heat resistance superalloys of the Nickel-Chromium family. Machining trials were conducted under four machining conditions: dry, conventional wet machining, high pressure coolant at 50 bar, and high pressure coolant at 80 bar. Temperature during machining plays a very important role in the overall performance of machining processes. Since in the current investigation a high pressure coolant jet was supplied in the cutting zone between tool and work material, it was a very difficult task to measure the tool temperature correctly. Thus, FEM was used as a modeling tool to predict tool temperature. The results of the modeling showed that the temperature was considerably influenced by coolant pressure: the high pressure jet was able to penetrate into the interface between tool and work material, thus providing both an efficient cooling and effective lubricating action.

scholarly journals Numerical Investigation of Air Conditioners’ Control Unit Position On Temperature Distribution and Energy Consumptions of a Room

2019 ◽  
Vol 111 ◽  
pp. 02039
Author(s):  
Mustafa Mutlu ◽  
Emre Çalışkan
Keyword(s):  
Steady State ◽  
Temperature Distribution ◽  
Control Unit ◽  
Air Conditioners ◽  
Comfort Levels ◽  
Temperature Distributions ◽  
Energy Consumptions ◽  
Cooling Loads ◽  
Homogeneous Temperature ◽  
Comfort Criteria

Minimum temperature difference should be achieved in conditioned rooms to meet comfort criteria. It is desired that the temperature set by a user from the control unit, should be the same in the entire room. Therefore, the position of the control unit plays a significant role in order to achieve a homogeneous temperature distribution in the room. In this study, the effect of control unit positioning on temperature and velocity distributions in a room, where a cassette type indoor unit was applied, was numerically investigated. Blowing temperature and speed of the indoor unit has been adjusted by the temperature value that measured by a control unit which was placed at five different locations, in order to examine positioning effects of the control unit. Predicted percentage dissatisfied (PPD) values were calculated, and uncomfortable zones were determined by 2-dimensional analyses. Cooling loads, as well as energy consumptions, were calculated and their variations according to the position of control unit was figured out in steady state conditions. The results showed that control unit positioning not only influences the comfort levels or temperature distributions in a room but also energy consumptions.

New Experiments on the Temperature Distribution in Drilling

1984 ◽  
Vol 106 (3) ◽  
pp. 242-247 ◽  
Author(s):  
A. Thangaraj ◽  
P. K. Wright ◽  
M. Nissle
Keyword(s):  
Temperature Distribution ◽  
High Speed ◽  
Metal Flow ◽  
High Speed Steel ◽  
Twist Drill ◽  
Temperature Distributions ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Twist Drills

Using metallographic and microhardness techniques, temperature distributions have been determined in twist drills. The methods rely on the fact that certain high speed steel materials exhibit microstructural changes when subjected to temperatures greater than 600°C. Quick-stop specimens have also been obtained to study the metal flow patterns over the drill flutes. These results have been used to comment on the different wear mechanisms that affect the performance of a twist drill. Preliminary results show that bulk plastic flow occurs near the margin of the drill where the temperatures are in the vicinity of 900°C when machining AISI 1045 steel at 40 m/min.

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