INFLUENCE OF ORTHOGONAL BURNISHING PARAMETERS ON SURFACE CHARACTERISTICS FOR VARIOUS MATERIALS | ||||
| ERJ. Engineering Research Journal | ||||
| Article 8, Volume 25, Issue 2, April 2002, Page 103-117 PDF (869.05 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2002.70663 | ||||
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| Authors | ||||
| NI. H. El-AXIR1; M. M. EL-KHABEERY2 | ||||
| 1Assistant Professor Department of Production Engineering and Mechanical Design, Faculty of Engineering, Shebin El-kom, Egypt. | ||||
| 2Associate Professor Department of Production Engineering and Mechanical Design, Faculty of Engineering, Shebin El-kom, Egypt. | ||||
| Abstract | ||||
| Burnishing is used increasingly as a finishing operation which gives additional advantages such as increased hardness, fatigue strength, wear resistance. It is well known that burnished surface characteristic can significantly affect the resistance of components to failure when subjected to high cycle fatigue loads. The fatigue crack, in general, nucleates at the surface of the part, and then propagates into the-bulk. Consequently, it is the state of the surface characteristic, where the crack nucleates, that is of paramount importance. Experimental work was carried out on a lathe to establish the effect of four roller burnishing tool parameters; namely, burnishing speed, burnishing depth, burnishing time and the initial hardness of material on the surface microhardness, the out-of-roundness and the reduction in workpiece diameter. It was found that all input parameters have a controlling effect, with different percentage, on the three output responses. The results showed that burnishing depth and burnishing time are the most important parameters controlling the values of both out-of-roundness and reduction in workpiece diameter. Also, an increase in burnishing speed leads to a considerable reduction in the microhardness index. Out-of-roundness increases with a decrease in the initial hardness of workpiece material | ||||
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