Machine tool
US11311953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2019 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Feb 21, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23F23/1218
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A machine tool that generates internal teeth or external teeth on a cylindrical workpiece includes a workpiece holder, a column which is relatively movable to the workpiece holder, a rotary main spindle which is rotatable with respect to the column, a working tool which is held by the rotary main spindle, and a phase detecting unit which detects a phase of the working tool with respect to the rotary main spindle. The working tool includes a cutter portion which has cutters, a holder portion, and a detected portion which is formed on the holder portion. The phase detecting unit includes a detecting section which detects the detected portion, and a calculating section which calculates a phase angle of the detected portion with respect to a reference position of the rotary main spindle, based on a result detected by the detecting section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.