Axiomatic Design in Obtaining a Device for Ultrasonic Machining

Oana Dodun,Laurentiu Slătineanu,Petru Duşa,Margareta Coteată,Gheorghe Nagît,Ema Panaite,E.C.N Puik,M.L Betasolo,D.S Cochran,J.T Foley

doi:10.1051/matecconf/201822301021

Abstract

Ultrasonic abrasive cavitational machining is a nonconventional machining method applied to remove surfaces in workpieces made of brittle, hard, or non-conductive materials that cannot be efficiently machined by other classical or nonconventional machining methods. Among the factors that can affect the values of the parameters of technological interest for the ultrasonic machining process, the relative pressure between the ultrasonic tool and the workpiece surface to be machined could be considered. The main objective of the research presented in this paper was to analyze the possibilities of selecting the most convenient solution among many such available solutions to ensure the tool feed motion, when designing a device for achieving an ultrasonic drilling process. At present, this selection could be achieved by means of an optimal selection method. Taking into consideration some functional requirements of the device, the method of analytic hierarchy process and the axiomatic design theory were used to solve some problems met in the design process.

Highlights

One of the manufacturing processes allowing the generation of the final part surfaces could be a process in which the material is removed from the workpiece in various ways
In the case of the analytic hierarchy process (AHP), the comparisons are based on a more detailed analysis, highlighting of how many times an alternative is better by means of marks included between 2 and 9
One of nonconventional machining techniques that may be used to achieve a hole with distinct transversal sections in difficult-to-cut materials could be the ultrasonic machining

Summary

Introduction

One of the manufacturing processes allowing the generation of the final part surfaces could be a process in which the material is removed from the workpiece in various ways. In a paper aiming to highlight the use of fuzzy axiomatic design principles in the selection of the nontraditional machining processes, Khandekar and Chakraborty took into consideration inclusively the ultrasonic machining as a machining technique applicable to materialize processes of micro-drilling in workpieces made of hardened tool steel [2]. Mourão et al developed an analysis of the way in which certain distinct non-conventional machining systems could be selected using the axiomatic design theory [4] They analyzed inclusively the capability characteristics of the ultrasonic machining systems, when as selecting criteria the material removal rate, accuracy, surface roughness, damage depth, corner radii, capital cost, tooling and fixture cost, power requirement and tool consumption are considered. The objective of the research presented in this paper was to identify and design constructive solutions for the investigation of the influence exerted by some factors corresponding to the ultrasonic abrasive cavitational machining on the values of the parameters of technological interests specific to such a nonconventional machining technique

Work principle in the case of ultrasonic machining

Methods of optimal selection

Use of AHP method

Conclusions