Manual inspection and testing of threaded
components, specially in high volume manufacturing
processes are time consuming and costly.
There are three different types of error which may
occur within the tolerance zone specified by the metric
thread ISO system, which are as follows:
(i) Error of the flank angle.
(ii) Error of pitch over the length of fitting.
(iii) Error of effective diameter.
Additionally, material build-up which blocks the
threaded zone may also render the component to be
rejected. These error may occur due to the manufacturing
process itself, either by cutting or rolling, such as
tool and die wear, materials defects , etc.
This thesis describe the design and development
of an automatic inspection system for threaded
components.
The system consists of a mechanical sensor, which is
interfaced to a PC and the operational tracing cycle of
the system is controlled to carry out the following
operations.
(1)- Belix path inspection.
(2)- thread form inspection.
The results of the helix path and the thread
form tracing are presented for the ISO metric
thread: (M6), <M8), and (M16), together with the
operational cycle.