Development of a methodology for prediction of surface rougness of curved cavities manufactured by 5-axes cnc milling

Download

index.pdf

Date

2007

Author

Çelik, Kazım Arda

Metadata

Show full item record

Item Usage Stats

118
views

65
downloads

The surface quality is identified by surface roughness parameters. The average surface roughness (Ra) is used in this study, as it is the most commonly used roughness parameter in the industry. A particular curved cavity of a forging die is selected for the experimental study. Different milling methods are tested. The comparison studies are conducted between 3-axes and 5-axes milling, linear and circular tool path strategies and down and up milling. According to the experimental study, appropriate method is determined for the milling of a particular curved cavity of a forging die. The experimental analysis based on design of experiments (DOE) has been employed by considering cutting speed, feed per tooth and stepover parameters. Multiple linear regression technique is used by which a mathematical formula has been developed to predict the Ra values for milling parameters. The results of the mathematical formula are controlled by conducting test experiments and good correlations are observed between the results of the formula and the results of test experiments.

URI

http://etd.lib.metu.edu.tr/upload/12608368/index.pdf
https://hdl.handle.net/11511/16893

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Development of amperometric glucose biosensors based on conducting polymers and different materials providing enhanced performance Gökoğlan, Tuğba Ceren; Toppare, Levent Kamil; Department of Chemistry (2016) The main objective of this study is to investigate breakage parameters of a narrow size fraction of coarse particles of a hard mineral when ground in a mixture with fine particles of a soft mineral. For this purpose, quartz and calcite were selected as mixture components varying appreciably in hardness (quartz mohs scale:7 and calcite mohs scale:3) but having quite similar densities. Mixture feeds comprised of -1.18+0.85 mm quartz (hard and coarse) and -106 µm calcite (soft and fine) at various proportions ...
Modelling and simulation of friction in deep drawing Başpınar, Murat; Akkök, Metin; Department of Mechanical Engineering (2011) Different contact surface parameters and operating characteristics are observed during the deep drawing process. It is not possible to find a formulation that can be used for all lubrication regimes. Therefore, several friction models have been developed in order to overcome this problem. In this study, a math program is developed which combines Wilson’s and Khonsari’s friction models in a new model in order to increase accuracy and efficiency in friction calculations. By comparing the results of both frict...
A computational model for partially plastic stress analysis of orthotropic variable thickness disks subjected to external pressure Eraslan, Ahmet Nedim; Yedekçi, Buşra (2014-04-01) A computational model is developed to predict the states of stressand deformation in partially plastic, orthotropic, variable thickness, nonisothermal, stationary annular disks under external pressure. Assuming a state ofplane stress and using basic equations of mechanics of a disk, Maxwell relation,Hill’s quadratic yield condition, and a Swift type nonlinear hardening law, asingle governing differential equation describing the elastic and partially plasticresponse of an orthotropic, variable thickness, non...
Construction of phase diagrams to estimate phase transitions at high pressures: A critical point at the solid liquid transition for benzene Ibrahimoglu, Beycan; Üner, Deniz; Veziroglu, Ayfer; Karakaya, Fuat; Ibrahimoglu, Beycan (2021-04-01) Phase diagrams are an integral part of the estimation of material properties in the case of high temperature and pressure. The pressure-temperature (P-T) phase diagram is used to determine the state of aggregation (solid, liquid, gaseous) of a substance under given conditions. This article presents a method to reveal new states in the phase diagram, including the possibility of the plasma state. Using the empirical data of benzene, a critical pressure beyond solid-liquid equilibrium was estimated. It is hig...
Assessment of optimum threshold and particle shape parameter for the image analysis of aggregate size distribution of concrete sections Ozen, Murat; Güler, Murat (Elsevier BV, 2014-02-01) Aggregate gradation is one of the key design parameters affecting the workability and strength properties of concrete mixtures. Estimating aggregate gradation from hardened concrete samples can offer valuable insights into the quality of mixtures in terms of the degree of segregation and the amount of deviation from the specified gradation limits. In this study, a methodology is introduced to determine the particle size distribution of aggregates from 2D cross sectional images of concrete samples. The sampl...

Citation Formats

K. A. Çelik, “Development of a methodology for prediction of surface rougness of curved cavities manufactured by 5-axes cnc milling,” M.S. - Master of Science, Middle East Technical University, 2007.