Cut-off die set
US4108029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | May 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/8769
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cut-off die set is disclosed for use in a cut-off apparatus of the type in which continuous length of tubing or other elongated stock emanating from a tubing mill is severed into lengths as the tubing emanates from the tubing mill by means of a cut-off die set mounted within the cut-off apparatus. The cut-off die set is adapted to be clamped to the tube so as to move therewith during severing of the tubing by a ram operated cut-off blade descending vertically to shear the tubing. The present disclosure involves a improvement to a notching mechanism often included in such cut-off apparatus in which a horizontally reciprocated blade notches the upper portion of the tubing just prior to severing by the main cut-off blade so as to eliminate dimples in the severed tube cross section. The improvement lies in a different timing of the movement of the notching blade with respect to the motion of the main blade, coupled with a different configuration thereof, the improved notching mechanism consisting of a notching blade having a hook shaped cutting edge which is pulled from an initial position extending over the tube across the upper portion of the tubing in order to notch the same, with…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.