Pressure welding with closed loop force control
US5138127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jul 31, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/318
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A parallel-gap welder applies a precisely controlled force to the weld head (40) by means of a solenoid (60) having a plunger (72) aligned with the axis of the welding electrodes (50,52). To precisely control the amount of force applied by the solenoid a load cell (80) is interposed between the weld head (40) and the solenoid plunger (72) to provide a feedback force signal (158) indicative of the force applied by the solenoid. The feedback force signal is used to control current through the solenoid coil (68) and thereby servo the applied force to a force command input. The solenoid plunger (72) and load cell (80) are axially aligned with the axis of the electrodes (50,52) and solenoid force is applied through a universal joint (76,78) connection to assure an in-line driving force on the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.