Abstract
This paper presents a comparative analysis of process performance of micro-grinding and electrochemical honing, with the aim to achieve higher precision and surface quality of rebuild surfaces of the engine valve face. The discarded engine valve face was rebuilt using plasma transferred arc cladding technique and its surface finish was evaluated in terms of average roughness and maximum roughness value. The improvement in profile error and total run-out were used to evaluate the optimum processing time of micro-grinding and ECH. The sets of experiments for micro-grinding and ECH were conducted. The results reveal that the ECH process is one of the ideal choice for finishing of recovered surfaces. The surface morphology of the processed part is significantly improved resulting in glazed and uniform texture. Results show that the ECH can produce the workpiece surface 75 % efficient than the micro-grinding. A significant improvement of 23.37 % in the average surface roughness value was found after ECH as compared with the micro-grinding.
Highlights
It is difficult for many developing countries to access medical equipment necessary for healthcare
This paper proposes a definition for medical equipment remanufacture
The medical equipment sector is one crucial area where its practice would yield tremendous benefits contributing to the sustainable development goals of health and poverty alleviation
Summary
It is difficult for many developing countries to access medical equipment necessary for healthcare. The model is primarily useful in resolving ethical, liability, environmental and cost issues associated with reusing single-use medical devices While these papers address medical equipment remanufacturing from various perspectives, none has reported the manner in which it is practised in the industry, especially from the perspective of fulfilling regulatory requirements which determine medical equipment market entry. This paper intends to analyse the EU and US regulatory perspectives with respect to medical equipment remanufacturing or related practices and to propose a definition for remanufacturing which can help to achieve the goal of increasing access to functional medical equipment in developing countries. This is important as current approaches are unsustainable. The European remanufacturing network market studies show that many developing countries are destinations for used medical equipment sold ‘as is’ or following poorly conducted recovery process [18], a situation which has contributed to the abundance of poor quality medical equipment that either cannot be put to use or would no longer be safe
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