Ultrasonic press using servo motor with integrated linear actuator
US7819158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Jul 18, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2905/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An ultrasonic welding system includes an ultrasonic welding stack mounted for linear movement and for applying a controlled force, speed, or a combination of force and speed to a first workpiece to press the first workpiece against a second workpiece to which the first workpiece is to be joined, and an electrically powered linear actuator coupled to the ultrasonic welding stack for moving the stack while applying a controlled force, speed, or a combination of force and speed to said stack, the actuator including an electrical servo motor producing rotational mechanical motion and an integrated converter for converting the rotational motion into linear motion. In one specific implementation, a controller is coupled to the linear actuator for controlling the force applied by said actuator to the ultrasonic welding stack, and a sensor is coupled to the servo motor for producing a signal related to the torque produced by the servo motor and supplying that signal to the controller. In a second specific implementation, a load cell is used for force feedback to the motion controller with a linear or rotary position feedback device used to provide position and velocity feedback to the moti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.