A method for measuring precision taper hole accuracy

Abstract

The invention discloses an accuracy measurement method for a precision tapered hole, comprising steps of using a marble slab to correct a zero position of an accuracy tapered hole accuracy measurement device, and using a standard ring gauge correction accuracy tapered hole accuracy measurement device (3) to measure the big end diameter of the accuracy tapered hole. The beneficial effects of the invention are that the precision tapered accuracy measurement device realizes the synchronization on-line measurement of the taper hole cone angle and the big end diameter, avoids the axial size error of the tapered hole, improves the processing accuracy of the tapered hole, improves the processing efficiency of the tapered hole. The invention is easy in operation, reduces the labor intensity, and simplifies the processing detection flow. The accuracy tapered hole accuracy measurement device is simple and reliable in structure, improves the rate of the finished products, guarantees the product quality and reduces the processing cost of the tapered hole.

Description

technical field [0001] The invention belongs to the field of taper hole measurement, and in particular relates to a method for measuring precision taper hole precision. Background technique [0002] Taper is widely used in mechanical structures. Taper fit is a commonly used typical structure. It has high coaxiality, good self-locking performance, good sealing performance, free adjustment of gap and interference, etc. The manufacturing and processing of taper holes has been tend to mature. There are usually three methods for the measurement of taper holes: comparative measurement method, direct measurement method, and indirect measurement method: [0003] (1) The comparative measurement method is to compare the standard taper measuring tool such as the cone plug gauge with the measured cone hole, and use the light gap method or the coloring method to check, by detecting the detection area and contact position of the cone plug gauge and the measured cone hole. Judging whethe...

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Problems solved by technology

[0004] (2) The direct measurement method is to read the measured taper directly from the measuring instrument. Commonly used tools include tool microscopes, three-coordinate measuring machines, etc. The direct measurement method has the characteristics of accurate measurement and intuitive measurement data, but the direct measurement method is usually The final inspection is carried out after the workpiece is processed to the finished product, and online inspection cannot be carried out during the processing;

[0006] At present, the comparison method is the main method to test the taper angle in actual production. The comparison method can measure the contact area between the taper hole and the taper shaft during processing; the direct measurement method can measure the taper angle and the diameter of the big end, but it is limited by the equipment. It can only be measured after the product is processed, and cannot measure the cone angle and large end diameter of the workpiece online; the indirect measurement method (measuring rod and steel ball measurement method) can calculate the large end diameter of the tapered hole through trigonometric functions, etc., but cannot measure the cone horn

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