Thickness determining apparatus

Abstract

The invention relates to a thickness measuring device which not damages a measuring sensor even in manual operation and also maintains a stable measuring precision. A lifting part (3) is provided witha contact body (31) contacted with a work piece (8), a reference stick (32) resisted with a reference surface (20) and used for determining the measuring reference point, and a measuring device (33)for measuring the displacement of the contact body (31). A reference board (2) is provided with a preparing surface (22) arranged above the reference surface (20), and a connecting surface (21) smoothly connected with the preparing surface and the measuring reference surface, wherein, the connecting surface can slide along the direction vertical to the lifting direction of the lifting part. The position where the reference board can move is set as the measuring position where the reference stick is resisted with the measuring reference surface, and the preparing position where the reference stick is resisted with the preparing surface (22). The height of the preparing surface is designed that the contact body (31) is not contacted with the work piece when the lifting part is descended so that the preparing surface is resisted with the lower end (320) of the reference stick.

Description

technical field [0001] The present invention relates to a thickness measuring device capable of preventing failure of the device when measuring the thickness of a plate-shaped workpiece and continuously performing high-precision measurement. Background technique [0002] For example, as a component (work) assembled in an automatic transmission, there is a multi-plate type in which a plurality of plates used in a wet multi-plate clutch / brake are stacked together. When assembling this part, its thickness must be measured correctly. According to this thickness, it is necessary to select the assembly plate to be combined for adjusting the piston stroke of the clutch and brake from various types. Therefore, in this case, measuring the thickness of the workpiece becomes an indispensable task. In addition, not only the parts of the automatic transmission, but also the thickness of the parts may have to be measured as necessary. [0003] However, as a device for measuring the thic...

AI Technical Summary

Problems solved by technology

Even if the sensor is not damaged, there is a possibility that the so-called zero point changes due to impact, which may deteriorate the measurement accuracy.

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