Cam-actuated thread tapper
US5165828A · kind A · utility
4Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Aug 12, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/675
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic thread tapper includes a cam-operated feed mechanism which drives the tap carriage rigidly in the advance direction only. Separate force means are employed to move the carriage in the retract direction when the tap is being withdrawn from the work material. Spindle and feed motors operate separately, but are cycle-coordinated during a dwell period between tapping strokes. By measuring any position error developed between the spindle and feed positions, a fault condition, such as a worn tap, a workpiece material defect, or an obstruction in the machine can be sensitively detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.