Autors: Mitev, P. V.
Title: Development of a System for the Active Orientation of Small Screws †
Keywords: automatic parts feeding, machine vision, servo mechanism

Abstract: This paper reviews the process of research, development and production of a system for the active orientation of small screws. The parts feature two different shapes on each side, which is suitable for machine vision inspection and not for classical vibratory bowl traps. When a part enters the jig, it is rotated at an angle of 90° for inspection. Based on the orientation, it may stay in this position or be rotated at 180°. This allows for active orientation; regardless of how the screw is presented to the camera, it is always positioned in the correct orientation by a servo mechanism. The main challenges are related to the small dimensions of the part. First of all, it has a diameter of only 3 mm and a length of 7 mm. A vibratory bowl feeder is used only for feeding and there is no orientation functionality in it. Afterwards, a vibratory linear feeder is placed so the ready parts are stacked and, thus, some buffer is created. This is important because vibratory bowl feeders are known for having unequal productivity in time and this could be solved by the linear feeder. Another key difficulty is the quality of the source parts. They are produced by several suppliers and sometimes there are chips and other remnants alongside the packages with screws. This imposes the need for a cleaning system as part of the servo actuator’s mechanism. Cleaning does not occur on every cycle; it is based on a timer that is predefined.

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Issue

Engineering Proceedings, vol. 70, 2024, Greece, https://doi.org/10.3390/engproc2024070055

Full text of the publication

Цитирания (Citation/s):
1. Vassilev V., Dimitrova R., Nikolov S., Optimization of the Operation of a Flexible Automated Assembly Line Using the Seven Basic Quality Tools, 2025, Engineering Proceedings, issue 1, vol. 104, DOI 10.3390/engproc2025104042, eissn 26734591 - 2025 - в издания, индексирани в Scopus

Вид: статия в списание, публикация в реферирано издание, индексирана в Scopus