Method and apparatus for high speed, high precision drilling and machining
US4088417A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1977 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Mar 4, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/953
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill may be fed into a workpiece at a rate where the angle descent is less than the primary relief angle of the drill and wherein the extruding action takes place in 1/3 or less of the drill diameter. Unachieved rates of drill feed speed with high precision may be achieved without punching or crushing the material of the workpiece. In order to accomplish such drilling rates an improved feed mechanism, utilizing a positively driven lead screw is employed. In addition, in order to utilize the high drilling rate, a multiple bank of spindles is devised having an X-Y adjustable configuration used in combination with a worktable translated by a lead screw and nut combination. The lead screw of the worktable is disposed within the worktable in the proximity of the axis of symmetry to the worktable in order to minimize twisting moments to the worktable. An automated collet is utilized in each of the spindles together with tool holders to provide for automatic changing of the drill bits without operator intervention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.