This article proposes a co-simulation platform concerning both mechanical and control subsystems, in order to test the dynamic performance of the welding machine. Two welding trajectories, before and after smoothing, are conducted in the simulation platform and welding practice to study the influence among smoothness, space precision and welding quality. Meanwhile, a series of welding trajectories are used to examine the spatial error of tool path motion by simulation in the platform. Results indicate that, the feed rate increases so high, beyond the dynamic characteristic of machine tool that induced undesirable oscillation of welding velocity and acceleration, as well as increased spatial error.
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