Temperaturanalyse beim Trennschleifen von CFK*/Temperature analysis during the cut-off grinding of CFRP

In der vorliegenden Arbeit wird eine empirische Untersuchung zum trockenen Trennschleifen von kohlenstofffaserverstärktem Kunststoff (CFK) vorgestellt. Im Mittelpunkt steht das Ermitteln der Zusammenhänge zwischen Prozessparametern und der Wärmeentstehung sowie resultierenden Temperaturen in der Schleifzone. Darüber hinaus wurde der Verschleiß der Trennschleifscheiben ausgewertet und die Bearbeitungsqualität untersucht.   The presented investigations discuss the dependencies of process parameters and heat generation in the dry cutting process of CFRP. For the cutting process, diamond-tipped grinding wheels are used. For further evaluation additionally the wear of the cutting abrasive and the cutting quality on the workpiece were determined.

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Experimental investigation to optimize laser cutting process parameters for difficult to cut die alloy steel using response surface methodology

Materials Today Proceedings ◽

10.1016/j.matpr.2020.11.201 ◽

2020 ◽

Author(s):

Amit Patel ◽

Sanket N. Bhavsar

Keyword(s):

Experimental Investigation ◽

Response Surface Methodology ◽

Response Surface ◽

Alloy Steel ◽

Process Parameters ◽

Laser Cutting ◽

Cutting Process

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Shoulder Related Temperature Thresholds in FSSW of Aluminium Alloys

Materials ◽

10.3390/ma14164375 ◽

2021 ◽

Vol 14 (16) ◽

pp. 4375

Author(s):

David G. Andrade ◽

Sree Sabari ◽

Carlos Leitão ◽

Dulce M. Rodrigues

Keyword(s):

Heat Generation ◽

Process Parameters ◽

Rotational Speed ◽

Aluminium Alloys ◽

Spot Welding ◽

Base Material ◽

Main Process ◽

Welding Temperature ◽

Friction Stir ◽

Tool Diameter

Friction Stir Spot Welding (FSSW) is assumed as an environment-friendly technique, suitable for the spot welding of several materials. Nevertheless, it is consensual that the temperature control during the process is not feasible, since the exact heat generation mechanisms are still unknown. In current work, the heat generation in FSSW of aluminium alloys, was assessed by producing bead-on-plate spot welds using pinless tools. Coated and uncoated tools, with varied diameters and rotational speeds, were tested. Heat treatable (AA2017, AA6082 and AA7075) and non-heat treatable (AA5083) aluminium alloys were welded to assess any possible influence of the base material properties on heat generation. A parametric analysis enabled to establish a relationship between the process parameters and the heat generation. It was found that for rotational speeds higher than 600 rpm, the main process parameter governing the heat generation is the tool diameter. For each tool diameter, a threshold in the welding temperature was identified, which is independent of the rotational speed and of the aluminium alloy being welded. It is demonstrated that, for aluminium alloys, the temperature in FSSW may be controlled using a suitable combination of rotational speed and tool dimensions. The temperature evolution with process parameters was modelled and the model predictions were found to fit satisfactorily the experimental results.

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Predicting the High Speed Cutting Process of Titanium Alloy by Finite Element Method

ASME 2011 International Manufacturing Science and Engineering Conference, Volume 1 ◽

10.1115/msec2011-50208 ◽

2011 ◽

Cited By ~ 3

Author(s):

Xiangqin Zhang ◽

Xueping Zhang ◽

A. K. Srivastava

Keyword(s):

Finite Element ◽

Cutting Forces ◽

High Speed ◽

Cutting Temperature ◽

Chip Morphology ◽

Cutting Process ◽

Fe Model ◽

Dry Cutting ◽

Friction Coefficients ◽

Machining Conditions

To predict the cutting forces and cutting temperatures accurately in high speed dry cutting Ti-6Al-4V alloy, a Finite Element (FE) model is established based on ABAQUS. The tool-chip-work friction coefficients are calculated analytically using the measured cutting forces and chip morphology parameter obtained by conducting the orthogonal (2-D) machining tests. It reveals that the friction coefficients between tool-work are 3∼7 times larger than that between tool-chip, and the friction coefficients of tool-chip-work vary with feed rates. The analysis provides a better reference for the tool-work-chip friction coefficients than that given by literature empirically regardless of machining conditions. The FE model is capable of effectively simulating the high speed dry cutting process of Ti-6Al-4V alloy based on the modified Johnson-Cook model and tool-work-chip friction coefficients obtained analytically. The FE model is further validated in terms of predicted forces and the chip morphology. The predicted cutting force, thrust force and resultant force by the FE model agree well with the experimentally measured forces. The errors in terms of the predicted average value of chip pitch and the distance between chip valley and chip peak are smaller. The FE model further predicts the cutting temperature and residual stresses during high speed dry cutting of Ti-6Al-4V alloy. The maximum tool temperatures exist along the round tool edge, and the residual stress profiles along the machined surface are hook-shaped regardless of machining conditions.

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B-IN02-08 PULSED FIELD ABLATION AND HEAT GENERATION: ELECTRODE-TISSUE TEMPERATURE ANALYSIS FROM THE PULSED AF TRIAL

Heart Rhythm ◽

10.1016/j.hrthm.2021.07.047 ◽

2021 ◽

Vol 18 (8) ◽

pp. S171

Author(s):

Atul Verma ◽

Lucas V.A. Boersma ◽

David E. Haines ◽

Francis E. Marchlinski ◽

Hugh Calkins ◽

...

Keyword(s):

Heat Generation ◽

Tissue Temperature ◽

Temperature Analysis ◽

Pulsed Field

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Ultraschallüberlagertes Trennschleifen von Faserverbundwerkstoffen*/Ultrasound abrasive cutting of fiber composites - Survey on the potential and mode of action

wt Werkstattstechnik online ◽

10.37544/1436-4980-2016-01-02-41 ◽

2016 ◽

Vol 106 (01-02) ◽

pp. 39-43

Author(s):

Y. Babenko ◽

T. Mayer ◽

A. Gebhardt

Keyword(s):

Surface Quality ◽

Process Parameters ◽

Mode Of Action ◽

Fiber Composites ◽

Cutting Process ◽

Force Analysis ◽

Abrasive Cutting

Dieser Fachartikel befasst sich mit der Untersuchung des Potentials der Ultraschallüberlagerung beim Trennschleifen moderner Faserverbundwerkstoffe. Es wurde eine Zerspankraftanalyse des Trennschleifprozesses am CFK-Werkstück mit variierenden Prozessparametern durchgeführt. Zudem wurden die Oberflächenqualitäten der Schnittkanten betrachtet.   The presented study describes the investigation of the potential of ultrasound abrasive cutting of modern fiber composites. A force analysis of the abrasive cutting process of CFRP was conducted, while the process parameters were varied. In addition, the surface quality of the machined workpieces was observed.

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Microstructural Characterization and Temperature Analysis in Friction Stir Welding of A383/5052 Dissimilar Aluminum Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.279 ◽

2007 ◽

Vol 561-565 ◽

pp. 279-282 ◽

Cited By ~ 1

Author(s):

Masafumi Kokubo ◽

Shinichi Kazui ◽

Takao Kaneuchi ◽

Yoshimasa Takayama ◽

Hajime Kato ◽

...

Keyword(s):

Friction Stir Welding ◽

Aluminum Alloys ◽

Analytical Model ◽

Heat Generation ◽

Microstructural Characterization ◽

Joint Line ◽

Experimental Temperature ◽

Temperature Analysis ◽

Friction Stir ◽

Dissimilar Aluminum Alloys

Microstructural characterization and temperature analysis have been performed in friction stir welding (FSW) of A383 and 5052 dissimilar aluminum alloys. Marked difference in microstructure was observed between joints with different arrangements of materials. The temperature at four points on each side of the joint line was measured during FSW in various conditions. In addition, an analytical model assumed that the work generated by the rotation of the tool led to the work for stirring materials and heat generation of the material and the tool. The temperature of the retreating side (RS) for the joint of the advancing side (AS):A383/RS:5052 was about 50K higher than that of AS, while the temperatures of AS and RS for the joint of AS:5052/RS:A383 were almost the same. The experimental temperature could be calculated reasonably by using the model with assumption of the work for stirring the material.

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The Relationship Between the Cutting Process Parameters and the Surface Roughness during the Aluminum Machining

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/877/1/012001 ◽

2020 ◽

Vol 877 ◽

pp. 012001

Author(s):

A B Pop ◽

M A Țîțu

Keyword(s):

Surface Roughness ◽

Process Parameters ◽

Cutting Process ◽

The Relationship

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Optimization of the Cutting Process Parameters to Ensure High Efficiency of Drilling Tunnels and Use the Technical Potential of the Boom-Type Roadheader

Energies ◽

10.3390/en13246597 ◽

2020 ◽

Vol 13 (24) ◽

pp. 6597

Author(s):

Piotr Cheluszka

Keyword(s):

Control System ◽

Energy Consumption ◽

Automatic Control ◽

Automatic Control System ◽

Process Parameters ◽

High Efficiency ◽

Rock Cutting ◽

High Energy ◽

Cutting Process ◽

Underground Mines

This paper deals with the automation of the rock cutting process with roadheaders used widely in civil engineering for drilling roadways in underground mines and tunnels. Although there has been intensive technical development, roadheaders are still manually controlled. Manual control does not allow optimizing the values of the cutting process parameters, which often results in low mining efficiency, especially in the case of hard rocks, as well as high energy consumption and significant dynamic overloading of the roadheader. As part of theoretical and experimental research, an automatic control system was designed for the boom-type roadheader and an algorithm was developed for the optimal control of the cutting process parameters. Control criteria have been formulated, based on which the current values of the cutting process parameters are worked out using the information on the dynamic load state of the roadheader. The paper presents selected results of numerical tests conducted on roadheader dynamics, which simulated the automatic control system operation of the heading face cutting process of drilled roadway or tunnel. These tests were intended to analyze the behavior of the investigated object during simulated rock cutting in automatic mode. The results confirmed the possibility of a significant reduction in mining energy consumption.

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Considerations regarding the use of cryogenic cooling in metal cutting as an alternative to conventional cooling – brief review

MATEC Web of Conferences ◽

10.1051/matecconf/201817803014 ◽

2018 ◽

Vol 178 ◽

pp. 03014

Author(s):

Ana Maria Bocăneţ ◽

Cristian Croitoru

Keyword(s):

Process Parameters ◽

Metal Cutting ◽

Cutting Tools ◽

Green Manufacturing ◽

Cryogenic Cooling ◽

Cutting Process ◽

Cooling Method ◽

Conventional Cooling ◽

Industrial Solutions

This paper presents a study regarding the latest researches on cryogenic cooling used in metal cutting as an opportunity for achieving green manufacturing, in terms of cryogenic methods, cutting tools, effects on cutting process parameters, industrial solutions and some possible applications in the areas where this cooling method presents deficiencies.

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