Method and apparatus for machining deep hole
US7771145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2008 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Feb 8, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/304032
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a method for machining a deep hole, which enables prevention of scattering of a coolant and efficient discharge of shavings.The deep hole machining method includes: feeding a spindle to a deep hole machining start position while jetting a coolant toward a workpiece from an external normal pressure coolant supply line; closing the external normal pressure coolant supply line and opening a spindle normal pressure coolant supply line at the start of machining of a deep hole, and machining the deep hole to a predetermined intermediate depth while supplying a coolant to a machining point; and closing the spindle normal pressure coolant supply line and opening a high-pressure coolant supply line when the depth of the hole machined has reached the intermediate depth, and machining the deep hole to the final depth while supplying a high-pressure coolant to a machining point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.