Pneumatic measuring head for outer diameter of large workpieces

Abstract

The invention discloses a pneumatic measuring head for the outer diameter of large workpieces, and belongs to measuring devices. According to the pneumatic measuring head for the outer diameter of the large workpieces, measuring head bodies can be separated from a whole measuring machine. The pneumatic measuring head for the outer diameter of the large workpieces comprises the two measuring head bodies communicated with air flues, wherein the air flues are air pipes (8) which are connected with the two ends of a tee-branch pipe (3) in parallel; the two measuring head bodies (6) are fixed to a connection rod (1); the connection rod is provided with a locating device; the locating device is composed of two slide rods (5) and locating heads (7) fixed to the slide rods (5) respectively; the slide rods are fixed to the connection rod (1) through threads. The pneumatic measuring head for the outer diameter of the large workpieces can effectively reduce the size and the weight of the whole machine, and ensure that the center line of an air hole of the measuring head is intersected with the center line of the outer circle of the workpieces, thereby improving the measuring precision. The pneumatic measuring head is used for measuring the outer diameter of the large workpieces.

Description

technical field [0001] The invention relates to a measuring tool, in particular to a pneumatic measuring head. Background technique [0002] As we all know, pneumatic measurement is a technology that uses compressed air as the medium to measure the size of the workpiece non-contact; its principle is to use the pressure sensor to convert the pressure difference into The electrical signal is then processed by the data processing unit and the result is displayed. At present, the pneumatic measuring device for the outer diameter of large-sized workpieces usually uses a built-in air channel; since the measuring head is fixedly connected to the built-in air channel, the measuring head cannot be separated from the whole machine, and there are defects such as bulky and bulky overall structure, inconvenient use and carrying. In addition, the traditional structure of the pneumatic measuring device does not have a positioning device, so it is difficult to ensure that the centerline of...

AI Technical Summary

Problems solved by technology

At present, the pneumatic measuring device for the outer diameter of large-sized workpieces usually uses a built-in air channel; since the measuring head is fixedly connected to the built-in air channel, the measuring head cannot be separated from the whole machine, and there are defects such as bulky and bulky overall structure, inconvenient use and carrying.

In addition, the traditional structure of the pneumatic measuring device does not have a positioning device, so it is difficult to ensure that the centerline of the air hole of the measuring head intersects with the centerline of the outer circle of the workpiece, and the measurement error is relatively large

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