Coaxiality caliper

Abstract

The invention provides a coaxiality vernier caliper with multifunctional measurement, which comprises an inner measure-hand pair (1), an outer measure-hand pair (2), a fastening screw (3), a vernier (4), a caliper frame (5) and a depth caliper rod (6). The structure improvement is in relation to the outer measure-hand pair (2) mainly; scales for measuring coaxiality and symmetry of products are marked on the same end surface of the big hand and the small hand of the outer measure-hand pair (2); the big hand of the outer measure-hand pair (2) is provided with a groove; the steps width at the low part and the upper part of the groove is c, the depth of the groove is b, and the width of the groove is a; the small hand of the outer measure-hand pair is used for measuring a trapezoidal section; a measuring head is positioned at the bottom of the trapezoidal section; the height of a measuring surface is E, and the width of the measuring surface is F; when the height E of the measuring surface has a big size and the width F of the measuring surface has a small size, the caliper is used for measuring the coaxiality of the inner hole and the excircle of a part; and when the height E of the measuring surface has a small size and the width F of the measuring surface has a large size, the caliper is used for measuring the excircle of the part and the coaxiality of an excircle groove and the excircle.

Description

technical field [0001] The invention relates to a multifunctional measuring tool, in particular to a caliper with coaxiality and symmetry measurement. Background technique [0002] Since the production of fasteners, in order to ensure their stable quality, people have invented a variety of measuring tools. These measuring tools are one of the indispensable conditions to ensure the quality of fasteners, such as inner diameter micrometers, outer diameter dry micrometers, vernier calipers, dial indicators, etc. Due to the limited function of ordinary vernier calipers in measurement, especially the difficulty in measuring coaxiality and symmetry, people can only use large-scale and more professional measuring instruments, which is labor-intensive and time-consuming. In on-site production, for example, when hot pier workers are testing the coaxiality of products, since there is no special instrument for measuring coaxiality in the workshop, indirect measurement methods are used,...

AI Technical Summary

Problems solved by technology

Due to the limited function of ordinary vernier calipers in measurement, especially the difficulty in measuring coaxiality and symmetry, people can only do it on large and more professional measuring instruments, which is labor-intensive and time-consuming.

In on-site production, for example, when hot pier workers are testing the coaxiality of products, since there is no special instrument for measuring coaxiality in the workshop, indirect measurement methods are used, but these methods have poor measurement accuracy and large errors, and each There may also be some differences in the reading results of personal measurement, so it is a problem to be solved to realize the convenient and fast measurement of product coaxiality in on-site production

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