Apparatus, system, and method for measuring thread features on pipe or tube end

摘要

A first thread feature is measured by detecting with an optical sensor 2 light that reaches from a light source 21 located on the opposite side of a pipe axis and runs substantially in parallel to thread grooves A4. A contact probe 31 of a contact sensor 3 is contacted with a thread flank surface A8 to detect the space coordinates of the contact probe 31 at the time of contact, so that a second thread feature is measured. The first and second thread features thus detected are combined with each other by a processor 4, and thread features of the thread provided as a measurement object are thereby calculated.

主权项

1. An apparatus for measuring thread features of a threaded pipe or tube end, comprising:
an optical sensor that measures a first thread feature, which does not relate to measurement of a thread flank surface, by detecting light that reaches from a light source located on the opposite side of the pipe or tube axis and runs substantially in parallel to the thread grooves; a contact sensor that measures a second thread feature, which relates to measurement of the thread flank surface, by contacting a contact probe onto the thread flank surface and detecting the space coordinates of the contact probe at a time of contact; and a processor that calculates thread features from the combination of the first thread feature and the second thread feature, wherein the contact sensor measures a profile of the thread flank surface by contacting the contact probe onto measuring points of the thread flank surface, the measuring points being spaced each other at different distances to the pipe or tube axis, wherein the processor combines a profile of an area other than the thread flank surface measured by the optical sensor with the profile of the thread flank surface measured by the contact sensor to calculate a thread profile, and wherein the thread flank surface includes a hooked frank surface having a hook shape.