Inner contour measuring meter

Abstract

The invention discloses an inner contour measuring meter which consists of two parts, namely a commodity dial gauge and a self-control gauge head, wherein an original gauge head is detached from a purchased dial gauge, and axial internal thread holes are reserved at the end face of a measuring rod of the dial gauge; the configured gauge head is in the shape of a two-way right-angled bent rod; and external threads at an upward end are connected with the axial internal thread holes at the end face of the measuring rod of the dial gauge, and a downward end is a measuring end which can extend into an inner cavity of a workpiece to perform measurement. The structure is especially suitable for measuring the inner contour in a machine element with small inner cavity volume, and the measurement result is indicated by external dial gauge magnitude values. On the other hand, the inner contour measuring meter disclosed by the invention is a mechanical measuring device, has no special restrictions on detection conditions, can be used in a production field, and is high in detection efficiency and low in use cost; and in a product line, the inner contour measuring meter used as the measuring device of an operator can be used for avoiding the occurrence of batched outoftolerance accidents.

Description

technical field [0001] The invention relates to a length measuring instrument, in particular, the invention relates to a gauge used for inner contour measurement. Background technique [0002] Under normal technical conditions, the outer contour size and shape position tolerance of mechanical parts can be easily measured with a dial indicator, while the measurement of the inner contour size and shape position tolerance of mechanical parts is restricted by the size of the inner cavity. If the inner cavity volume is small, The scale cannot be accommodated and cannot be measured directly. The existing technology can only be measured with the help of special measuring tools or numerical control measuring equipment. Although this approach can achieve precise measurement, it has high requirements for detection conditions, low detection efficiency, and high detection cost, so it is not suitable as a detection tool on the production site. Due to the constraints of the above reasons...

AI Technical Summary

Problems solved by technology

[0002] Under normal technical conditions, the outer contour size and shape position tolerance of mechanical parts can be easily measured with a dial indicator, while the measurement of the inner contour size and shape position tolerance of mechanical parts is restricted by the size of the inner cavity. If the inner cavity volume is small, The scale cannot be directly measured, and the existing technology can only be measured with the help of special measuring tools or numerical control measuring equipment

Although this method can achieve precise measurement, it has high requirements for detection conditions, low detection efficiency, and high detection cost, so it is not suitable as a detection tool for production sites.

Due to the constraints of the above reasons, the sampling frequency of mechanical parts with small inner cavity volume is affected during the production process, and quality accidents of out-of-tolerance batch products are prone to occur.

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