Hybrid universal handling systems for micro component assembly

Abstract

Highly sophisticated machining techniques make it possible to manufacture ultra precise micro components as small as 100 mu. These micro components are normally mounted onto larger macroscopic components before being incorporated into, e.g., medical, telecommunication or sensor technology products. In view of the highly inflexible systems currently available, the work carried out by the Fraunhofer IPT with funding from the SFB 440 focuses on the development of a hybrid, universally applicable fine positioning system. The system consists of an assembly head which, with the aid of an integrated six-axis fine positioning unit and an integrated sensor unit for referencing the assembly position, gives a conventional positioning system such as an articulated robot arm the ability to perform highly precise micro assembly processes. This provides the context for the development work carried out by the Fraunhofer IPT into assembly head design concepts. The first step involved investigating the positioning behavior of a conventional articulated robot arm, and then analyzing the demands placed on the assembly head. This is followed by the development and optimization of the miniaturized guidance, actuator and sensor components that are needed for the construction of a robust, highly precise six-axis fine adjustment system. The result of this work includes a set of linear guides, the size of a matchbox, with air bearings. The prototype guides set up at the Fraunhofer IPT have a non-contact interface, which makes it possible to convey compressed air without friction or force

Micro metal injection molding (MicroMIM)

“…This positioning of gripper to part has to be considered thoroughly during process planning (Freundt et al, 2008). This is also true for automated quality assurance.…”

A Hybrid Microspherical Styli Gluing and Assembling Process on Micro-EDM

“…These manipulators have been designed individually to handle different types of microobjects such as microgears and microshafts. Due to the delicacy and weakness of microparts, various types of microtweezers and grippers were developed to manipulate the microobjects by lead zirconate titanate (PZT) actuator [7]. However, it is still difficult to develop tweezers or grippers for microglass balls with 0.07 mm diameter manipulations.…”