Blind hole depth auxiliary measuring tool and blind hole depth measuring device

Abstract

The invention discloses a blind hole depth auxiliary measuring tool and a blind hole depth measuring device. The blind hole depth auxiliary measuring tool includes a mounting cylinder, a transition rod, a return spring and a threaded pressure ring, and the transition rod is coaxially inserted in the mounting cylinder. When measuring, insert the mounting cylinder into the blind hole to be measured, make the outer flange of the reference stick to the surface of the workpiece, put the measuring rod of the depth micrometer against the end face of the second end of the transition rod, and push the transition rod through the measuring rod To contact with the bottom of the blind hole, since the distance between the end surface of the first end of the transition rod and the reference outer flange can be obtained in advance before the installation cylinder is inserted into the blind hole, the distance that the depth micrometer pushes the transition rod to move can be adjusted Obtained by a depth micrometer, the sum of the distance between the end face of the first end of the transition rod and the reference outer flange, and the distance that the transition rod is moved by the adjustment depth micrometer is the depth of the blind hole. The measuring range of the depth micrometer has been increased, and blind holes with greater depth can be measured.

Description

technical field [0001] The invention relates to the field of measuring tools, in particular to an auxiliary blind hole depth measuring tool and a blind hole depth measuring device. Background technique [0002] A blind hole is a hole that connects the surface and inner layers of the workpiece without penetrating the workpiece. For example holes for partially inserted studs. [0003] After the blind hole is drilled on the surface of the workpiece, it is usually necessary to measure the depth of the blind hole to facilitate the cooperation of other structures with the blind hole. [0004] At present, a depth micrometer is usually used to measure the depth of blind holes, and the range of the depth micrometer is usually relatively small, generally only 100mm, and the depth micrometer with a larger range is only about 300mm, which cannot measure deeper blind holes. Contents of the invention [0005] Embodiments of the present invention provide an auxiliary blind hole depth m...

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Problems solved by technology

[0004] At present, a depth micrometer is usually used to measure the depth of blind holes, and the range of the depth micrometer is usually relatively small, generally only 100mm, and the depth micrometer with a larger range is only about 300mm, which cannot measure deeper blind holes.

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