Study of Parameters for Internal Finishing Process using Magnetic Field
Keywords:
Non Traditional Machining, Magnetic field assisted Machining, Electromagnet, oscillation, frequencyAbstract
Magnetic field-assisted finishing (MFAF) is a precision machining process belonging to the category of non-traditional machining processes. In this process, surface finishing and deburring are performed in the presence of a magnetic field. These systems are used in critical applications, such as high-pressure gas or liquid pipelines. Today, the demands placed on production by industry are increasing due to the complexity of working profiles, the need for precision, and the requirement for micro-surface treatment.
A review of the literature shows that, although significant research has been conducted on various aspects of the efficient use of DC-driven electromagnets, there is insufficient information regarding the use of electromagnets in internal machining applications. In this study, an experimental setup was designed and constructed to investigate the internal finishing of stainless-steel pins using magnetic materials. The pins were subjected to AC frequency conversion and precision machining. Additionally, the oscillating motion of the pins induces residual compressive stresses on the surface, thereby improving the fatigue integrity of the product.
The performance of the developed device was evaluated through a series of experiments. Important parameters, such as magnetic flux density, number of pins, workpiece spindle speed, and working combination, were selected for testing. The effects of these parameters were investigated using the developed experimental setup. The results show that several factors do not have a significant impact on the improvement of workpiece surface quality.
The main problems faced by MFAM users are the cost and impracticality of conventional abrasives. Therefore, it is necessary to investigate alternative finishing methods. The experimental data indicate that small stainless-steel pins can be used for finishing and replacing conventional abrasives in metal surface treatment. However, dynamic movement must be applied to the pins to achieve effective finishing. The configuration developed in this study was used to evaluate the suitability of various parameters and determine how the finishing quality of the specified workpiece area could be improved.
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