Bodymaker drive system
US5735165A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jun 23, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/28
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A mechanical bodymaker drive system for an under drive type vertical punch including a scotch yoke mechanism utilized to drive the punch. Two counterrotating cranks with counterweights are geared together to balance inertial forces on the scotch yoke driven slide. The scotch yoke mechanism, employing a slider block and slide, eliminates second harmonic inertia forces acting on the machine and allows counterrotating counterweights to totally balance inertia forces throughout the stroke. The punch is additionally hydrostatically attached to the scotch yoke mechanisms to compensate for deflections and thermal stress during operation. The hydrostatic pads eliminates the clearance between the face of the punch and the scotch yoke yet permits small lateral movements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.