| 摘要 |
PURPOSE:To form a T-shaped slot with high accuracy and high efficiency by means of lathe processing by applying prescribed processing respectively from the inside of an outer cone and the outside of an inner cone, combining both and cutting off the excess part at the forming of the inner cone in the slot processing of a horn where the T-shaped slot is formed in a circumferential direction. CONSTITUTION:A horn 3 is split into inner and outer cones 8, 9 to form the T-shaped slot 2 for the horn 3, a slot 10 with a step being a basic form of the T-shaped slot 2 is processed for the inner cone 8 and a V-shaped slot 11 for completing the T-shaped slot 2 is processed for the outer cone 9. Then both the cones are combined so that a projection 1 of the inner cone 8 and a recess 2 of the outer cone 9 are mated and a T-shaped space 12 is formed inside. For example, laser welding 4 is applied to a part of the outer cone 9 having the thinnest thickness, that is, the recess 2, to bond both the members 8 and 9. In cutting off the excess part 3 by the lathe processing, a finished product of the horn 3 having the T-shaped slot 2 is obtained. |
