METHOD OF MANUFACTURING AN ELBOW, CUTTING TOOL, AND ELBOW
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United States of America Patent
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Feb 13, 2015
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Jul 31, 2013
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Abstract
Provided is a method of manufacturing an elbow, including: a first cutting step of cutting a material by relatively moving a cutting section of a cutting tool, which is formed of at least apart of a substantially spherical shape, along an inner side surface of the elbow to be finished in a direction from a first end surface to a second end surface of the material; and a second cutting step of cutting the material by relatively moving the cutting section along the inner side surface of the elbow to be finished in a direction from the second end surface to the first end surface of the material.
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