SCREW ROTOR MACHINING METHOD, MACHINING DEVICE AND MACHINING TOOL, AND METHOD OF MANUFACTURING SCREW COMPRESSOR

Title:

SCREW ROTOR MACHINING METHOD, MACHINING DEVICE AND MACHINING TOOL, AND METHOD OF MANUFACTURING SCREW COMPRESSOR

Document Type and Number:

WIPO Patent Application WO/2017/057026

Kind Code:

A1

Abstract:

Provided is a screw rotor machining method in which screw tooth grooves are formed by simultaneously controlling a plurality of rotation shafts that are for rotating a workpiece and turning a tool. The machining method includes: a step of cutting down to a desired depth; a step of performing rough machining of side surfaces of tooth grooves; a step of performing finishing machining of the side surfaces of the tooth grooves; and a step of performing finishing machining of bottom surfaces of the tooth grooves. In the step of performing the finishing machining of the bottom surfaces of the tooth grooves, used is an end mill that is provided with a cutting edge of a size equal to or greater than an axial cut-in amount at the side surface, that has a tip shape corresponding to the bottom surface of the screw tooth groove, and that has an outer shape of a size equal to or less than the diameter of a tool that can be inserted to the bottom of the screw tooth groove at a position of maximum groove depth.

Inventors:

NAKASUJI TOMOAKI (JP)
KAWAKAMI TETSUJI (JP)
KAMIKAWA MASAAKI (JP)
ITO TAKESHI (JP)
WATANABE ISAMU (JP)

Application Number:

PCT/JP2016/077300

Publication Date:

April 06, 2017

Filing Date:

September 15, 2016

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

B23C3/32; B23C5/10; B23C5/12; B23F15/08; F04C18/16; F04C29/00

Domestic Patent References:

WO2004089569A1	2004-10-21
WO2009028127A1	2009-03-05

Foreign References:

JP2011251377A	2011-12-15
JP2009202327A	2009-09-10
JP2009057921A	2009-03-19
US6122824A	2000-09-26
US3932077A	1976-01-13

Other References: