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AssigneeHitachi, Ltd.
InventorsToshikazu Niwa, Mineo Takahashi, Kazumi Aiba
Estimating the term…
A method of processing a scroll member having a spiral wrap and an end plate which is conducted by effecting a shaving on at least one side surface of the spiral wrap by a tool while applying to the tool both of an axial small force and an ultrasonic oscillation simultaneously. An apparatus is proposed which comprises a shaving tool having a spiral groove of the same configuration as the spiral wrap, and a cutting edge portion formed on at least one side edge of the groove over the entire length of the side edge. A tool supporting device supports the shaving tool, and a blank supporting device supports a scroll blank such that the scroll blank opposes to the shaving tool. A device is connected to the tool supporting means and is adapted to impart to the tool a pressing force necessary for effecting the shaving, and an ultrasonic oscillation generating device is adapted to impart an ultrasonic oscillation to one of the tool or the blank.
A method of processing a spiral wrap of a scroll member, the method comprising the steps of precisely forming a blank into a shape approximating a final form of the spiral wrap by providing a small tolerance to leave a minimal margin for finishing, said blank having inner and outer side surfaces, cutting at least one side surface of the blank with a forming tool having at least one cutting edge of the same shape as the spiral wrap by effecting a shaving on the at least one side surface of said spiral wrap to finish the blank with one step of shaving while applying a small axial force to cause a relative axial movement of the tool and blank toward one another and simultaneously applying an ultrasonic oscillation of about 17.7 KHz to one of the forming tool and the blank.
An apparatus for processing a scroll member having a spiral wrap and an end plate integral with each other, characterized by comprising:
Dependencies are inferred from the claim text.