Pin-plate micro assembly by integrating micro-EDM and Nd-YAG laser

Compound and Hybrid Micromachining Processes

“…A novel process has been developed to solve the issues by combining the micro-EDM and Nd-YAG laser welding workstation in a single setup (17)(18)(19). However, the first challenge is how precisely to position the microparts assembled.…”

“…Online assembly may be one possible solution. Figure 16 shows examples of assembled microfeature parts using this compound process (17,19). Also, laser welding is a very effective technique of microassembly.…”

Fabrication of a micro-pin array with high density and high hardness by combining mechanical peck-drilling and reverse-EDM

“…The minimum diameter of the micro-pins could be Ø4 m. The aforesaid is about removing material from the bulk to become micro-pins. In another way, Huang and Kuo (2002) combined WEDM and Nd-YAG laser to produce micro-pin arrays. First, WEDG was used to fabricate a micro-pin, which was further applied to the fabrication of micro-holes on a plate of SUS304 by MEDM.…”

A Classification and Coding System for Micro-Assembly

“…Specifically, different sub-assembly operations for parts of different dimension ranges were related to the gripping, positioning, sensing and forces during assembly. The table is drawn up based on several micro-assembly experiments that have been performed and understood over the years [2][3][4][5][6][7][8][9]. The first column shows sub-assembly operations that are related to the geometry and symmetry of the parts.…”

“…Developing a systematic architecture for assembly has been a driving force of research efforts as seen in the work of Hollis et al leading to development of tabletop precision assembly systems [1]. Likewise, Kuo et al [2] have carried out assembly of a 38 A Classification and Coding System for Micro-Assembly 150 ^m diameter pin with a 200 | Lim thickness plate under the guidance of three laser fibers creating a Molten Separation Joint (MSJ). Another interesting example of microassembly is a commercial unit by Klocke Nanotechnik with four nanorobotics axes (X, Y, Z-stages plus microgripper) and a joystick, which is capable of carrying out assembly of glass fibers, laser diodes, RF-mixer, micro systems or the handling of thin wires, gears, SMD-chips and micro sensors [3].…”