| 摘要 |
<p>Apparatus and method for manufacturing an impeller consisting of a body with many vanes and a shroud joined with the body. The apparatus comprises a die for chucking the body, a horn for supporting the shroud to be in contact with the vanes while the body is chucked by the die, a torque motor for applying vibration to the horn, and a pneumatic cylinder for giving pressure to the torque motor so that the shroud and the body are pushed in a contacting direction with each other. The torque motor is driven by half-wave rectified alternating current, and generates twisting vibration of the frequency between 10 Hz and 1 kHz. The shroud and the body are firmly joined by the twisting vibration. Thus little burr is generated. Further, the present invention can be adopted for manufacturing the impeller elements of diverse materials.</p> |
