Detection tool used for detecting surface profile tolerance of automobile curved surface parts

Abstract

The invention discloses a detection tool used for detecting surface profile tolerance of automobile curved surface parts. The detection tool comprises a base, a detection frame and a dial gauge, wherein a concave cavity used for accommodating a part to be detected is formed in the base, the detection frame is mounted on the base, the detection frame spans the outer sides of the concave cavity, a plurality of detection holes penetrating the detection frame in the thickness direction are formed in the detection frame, each detection hole comprises a first positioning hole and a second positioning hole which are communicated, the second positioning holes are closed to the concave cavity, the dial gauge comprises a measuring rod capable of resetting elastically, the outer side of the measuringrod is provide with a sleeve, the aperture of each first positioning hole is matched with the outer diameter of the sleeve, and the aperture of each second positioning hole is matched with the outerdiameter of the measuring rod. The detection tool has the advantages of high detection efficiency, detection precision and cost-effectiveness ratio, is simple in operation, has good adaptability, is suitable for point-acquisition detection of surface profile tolerance of the curved surfaces with various slopes, and can be used as an ordinary detection tool for performing on-site detection and quality control on batch production of curved surface parts.

Description

technical field [0001] The invention relates to a checking tool for auto parts, in particular to a checking tool for testing the surface profile of curved parts of the car. Background technique [0002] Automotive exterior and interior parts represent the styling styles of different models, and usually have complex contour surfaces. For testing whether the surface contour of such parts with complex contour surfaces meets the tolerance requirements of the surface contour, there are currently two methods: method. [0003] The first method: use expensive three-coordinate point measurement equipment (generally priced at hundreds of thousands of yuan), fix the part to be tested on the special measurement bracket for the part, and then according to the size of the surface and the surface features of interest , take some points on the specific parts of the part surface as detection points, and then measure the deviation of these detection points to judge the deviation of the part ...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: 1. When measuring, it is necessary to repeatedly use plug gauges of different sizes to insert the gap between the clamp and the surface to be tested, and gradually approach the measured B value, and the detection efficiency is low.

When there are many measurement points, the detection efficiency is even lower; 2. If the curved surface slope on the left and right sides of the clamp is large during measurement, the plug gauge cannot be inserted, and it is difficult to measure the B value; 3. The operation action is not good. The detection error caused by the standard and too much freedom

When measuring, the plug gauge needs to be perpendicular to the measuring surface of the card board and slide in the gap between the card board and the surface to be measured. Due to manual measurement, it is impossible to make the plug gauge completely perpendicular to the measuring surface of the card board, and the shape of the plug gauge is limited. The limitation is that it cannot accurately contact the specified point of the surface to be measured to measure the B value, and the measurement error is large

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