Wheel rear distance measurer

Abstract

The invention relates to a measuring tool, in particular to a wheel rear distance measurer. The wheel rear distance measurer comprises a depth indicator and is characterized in that a measurement reference plate is arranged on each of reference blocks at the two sides of a depth indicator frame; the measurement reference plates and the reference blocks at the two sides of the depth indicator frame are positioned on the same plane; and the measurement reference plates are connected with the reference blocks of the depth indicator frame by bolts so as to bring convenience for regulating the flatness of the measurement reference plates and the reference blocks at the two sides of the depth indicator frame, thereby improving the measurement precision. When the wheel rear distance measurer is used, the decorative surface of an aluminium alloy wheel is placed downwards in a flat way, the measurement reference plates of the wheel rear distance measurer are arranged on an inner rim, so that the rear distance size of the wheel can be directly measured, two-time measurement and one-time calculation are omitted, a measurement error can be reduced, and meanwhile, the measurement time can be saved. The wheel rear distance measurer has the advantages of simple structure, convenience in operation and the like.

Description

technical field [0001] The invention relates to a measuring tool, in particular to a wheel rear distance measuring device with high measuring speed and high measuring precision. Background technique [0002] As we all know, due to the good thermal conductivity and mechanical strength of aluminum alloy, the wheels of medium and small cars are generally made of aluminum alloy. The manufacturing process is through casting blanks, heat treatment (solution, quenching, aging treatment), CNC Machining and painting, and finally packaged into finished products. In the process of production and processing, the rear distance of the aluminum alloy wheel is an important dimension, because the rear distance of the wheel is a key dimension to match the brake disc of the whole vehicle, so it must be strictly controlled. In the actual production and processing process, it is necessary to detect the back distance dimension of the cast blank to determine whether the blank has axial deformation...

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Problems solved by technology

[0002] As we all know, due to the good thermal conductivity and mechanical strength of aluminum alloy, the wheels of medium and small cars are generally made of aluminum alloy. The manufacturing process is through casting blanks, heat treatment (solution, quenching, aging treatment), CNC Machining and painting, and finally packaged into finished products. In the process of production and processing, the rear distance of the aluminum alloy wheel is an important dimension, because the rear distance of the wheel is a key dimension to match the brake disc of the whole vehicle, so it must be strictly controlled. In the actual production and processing process, it is necessary to detect the back distance dimension of the cast blank to determine whether the blank has axial deformation, and to test the machined back distance dimension according to the specified frequency. The measurement method currently used is on the inner rim Place the transitional ruler, then use the depth ruler to measure, and subtract the height of the transitional ruler from the measured value to obtain the final back distance size. This measurement method requires two measurements and one data calculation, and there is a measurement error in the measurement itself. Therefore, after two measurements, the error of the rear distance obtained by one calculation increases, and the measurement time is increased.

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