Design Optimization of a Cartesian Assembly Cell

Abstract

Cartesian Manipulators are still widely used in many application sectors, due to their relatively simple construction and easy controllability. In this work authors present a study concerning the revamping of an existing manipulator, in which it's shown how an integrated mechatronic design affecting structure, actuation and drive system can produce an important increase in terms of performance with near to null costs. Existing manipulator is revamped in order to obtain a higher stiffness respect to static loads, higher accelerations and reduced working cycles with a attention to the assembly of electronic components using a conventional THT (Through Hole Technology) approach or more innovative solutions such as the so called "Press Fit" systems in which higher insertion forces are required. To further improve productivity of the machine, an innovative multi-tool head is introduced.

New mechanism for press-fit processes: preliminary analysis

“…To increase the stiffness of the device, the authors of this paper took inspiration from classical construction theory and practice that suggests using tension/compression only elements. By thinking about orientable telescopic elements that could move (Peruzzi et al, 2021) Figure 3 Steps of the systematic design process considered in this work…”

“…Example of a Cartesian machine for press-fit assembly of power electronic components (Peruzzi et al , 2021)…”

“…Usually, the machines used to perform press-fit assembly of large power electronic components are typically based on a Cartesian layout (Peruzzi et al , 2021) such as the one shown in Figure 2. Generally, relatively robust structure is needed to hold the end effector, which is required to exert relatively high vertical forces (600–700 N for the example of Figure 2), with the required accuracy of position.…”