Forging machine transfer with misalignment detector
US4549425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1983 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Oct 6, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S294/907
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A misalignment detector for forging machine transfers is disclosed. Such transfers provide grippers which move from a first position in which workpieces are not present to a second position when a workpiece is properly gripped. If a misaligned workpiece is present, the gripper moves to a third position beyond the second position. Each of the embodiments provides a beam-type spring mounted for deflection as the associated gripper or grippers move between the three positions. In some embodiments, the spring is bent as a function of the relative position of two opposed grippers and in other embodiments a spring is associated with a single gripper and is bent as a function of the gripper position. In some embodiments, strain gauges are mounted on the springs to produce a modulated signal to indicate the gripper position and operate the machine's emergency stop if necessary. In one embodiment, the spring is associated with a pneumatic system and allows a bleed orifice to open when misalignment is present. Opening of the bleed orifices creates a pressure drop and actuates a signal generating switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.