Abstract
In this paper experimentaly analyzed elastic vib-rations of the peg while in a contact with bushing in auto-mated assembly. Experimental setup and methodology of investigation are explained. Influence of excitation frequency and mounting conditions of the peg to the peg‘ tip lateral and longitudinal vibrations amplitude was determined. Peg‘s tip movement trajectory in three per-pendicular planes were concluded while contact position between peg and bush is different. Analysis of experimental data explaines reasons why bushing always slides toward coordinate axes center despite its original position. DOI: http://dx.doi.org/10.5755/j01.mech.19.6.6014
Highlights
Since 1961, when the first industrial robot was introduced in GM (General Motors) Ternstedt plant in Trenton, NJ (New Jersey), annual demand on robot systems continuously increases and consisted of 166028 units in 2011
Synchronization signal related to the excitation signal was used to synchronize measurement process
As long as vibrations are periodic and steady, vibrations magnitude (xi, yi, zi) of each axis is defined at the same periodic time τi according to the synchronization
Summary
Since 1961, when the first industrial robot was introduced in GM (General Motors) Ternstedt plant in Trenton, NJ (New Jersey), annual demand on robot systems continuously increases and consisted of 166028 units in 2011. The main consumers of robotic systems remains automotive, electronics, chemical/rubber/plastic industries, where robots used in various parts assembly, welding, painting pick-and-place tasks [1]. To ensure product quality and reduce production costs the use of robotic systems is effective but expensive solution. More over robots/manipulators requires periodical maintenance and replacement of wear and tear parts to ensure high performance accuracy which is very important in automated assembly. Wearing parts not the only source of the assembly errors. Tolerances of assembled parts, positioning errors, vibrations in manufacturing area reduces robots ability for successful task performance and simple peg-to-hole assembly operation might be impossible
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