Ultrasonic press using servo motor with delayed motion
US8720516B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2011 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Sep 26, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2905/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An ultrasonic welding system includes a controller, an electrically powered linear actuator driving a movable element to which an ultrasonic welding stack is mounted to move linearly and apply a controlled force and/or speed to a workpiece. A sensor measures a control variable and outputs to the controller a signal corresponding thereto. Based on this signal, the controller causes the linear actuator movable element to apply through the ultrasonic welding stack a predetermined positive initial force at an initiation of a welding operation and to limit a linear displacement of the ultrasonic welding stack to a predetermined initial displacement until the dynamic signal output from the sensor indicates that a sensed variable satisfies a predetermined condition. Based on the signal relating to the satisfied predetermined condition, the controller moves the ultrasonic welding stack in accord with a default weld profile or a weld profile selected from available weld profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.