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Wang Xiaodong
School of Mechanical Engineering,
Dalian University of Technology,
Dalian 116024, China
Jürgen Hesselbach
Institute
of Machine Tools and
Production Technology,
Technical University of Braunschweig,
Langer Kamp 19B, 38106,
Braunschweig, Germany
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BONDING OF MINIATURE PARTS
WITH ADHESIVES AND VISION
BASED PROCEDURE INSPECTION
Abstract:
Bonding with adhesives is an important technique for building up hybrid microsystems. Some adhesives are tested with capillary dispensing system for microassembly, and volume of drop-lets less than 10 nl with good repeatability can be acquired. 1-part UV curing adhesive hardens rapidly and is suitable for bonding of transparent microparts. Light-activated adhesive starts the curing process in an adjustable short period of time after the radiation of visible light, and thus suits bonding of non-transparent microparts. A method is proposed for bonding the guides of a miniature linear motor being developed by collaborate research center 516 (SFB516) in Germany. With the method high assembly accuracy in the vertical direction can be guaranteed. By making small grooves on the stator for containing adhesive, the deterioration of the accuracy due to the thickness of adhesive layer can be avoided. The criteria on deciding the size of the groove are given and analyzed. Vision based inspection method is introduced for automatic assembly of the guides. The dispensing volume and position of dispensed adhesive droplets can be detected for ensuring the bonding quality.
Key words: Microassembly Bonding with adhesives Miniature linear motor Vision-based inspection
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