Detection tool and method for detecting geometric accuracy of spindle axis of precision numerical control machine tool

Abstract

The invention discloses a detection tool for detecting the geometric accuracy of the spindle axis of a precision numerical control machine tool. The detection tool comprises a transition connector, a supporting plate, a locking nut and a dial indicator. The surface of the supporting plate is provided with two kidney-shaped grooves. One end of the supporting plate is connected with the dial indicator. One end of the transition connector penetrates through the kidney-shaped grooves in the supporting plate and is in threaded connection with the locking nut, and therefore fixed connection between the transition connector and the supporting plate is achieved. According to a detection method of the detection tool for detecting the geometric accuracy of the spindle axis of the precision numerical control machine tool, the dial indicator is not directly mounted on the end face of a spindle, an indicator swing radius detection record is adjusted through the detection tool. The detection tool is simple in structure and convenient to use, can be designed for different equipment in a targeted mode under the condition that all requirements are met, and is portable, easy to mount and high in accuracy of obtained data when being used for detecting the geometric accuracy of the spindle axis of the precision numerical control machine tool; and all possibilities that the dial indicator slips in the detection process are avoided through fixed clamping, and the indicator swing radius can be automatically adjusted.

Description

technical field [0001] The invention relates to the field of precision detection, in particular to a detection tool and a method for detecting the geometric precision of the spindle axis of a precision numerical control machine tool. Background technique [0002] After the precision CNC machine tool has been used for a period of time, the accuracy of the machine tool will deviate due to reasons such as air temperature, foundation soil quality, tides, and long-term heavy cutting. Therefore, it is necessary to detect and adjust the geometric accuracy of the machine tool to ensure the quality of processed products. The accuracy meets the drawing design requirements. During precision testing, the straightness of the spindle axis relative to the workpiece machining surface is an essential testing item. The accuracy of this item directly determines the flatness of the milling process and the cylindricity of the boring process. [0003] Taking the CNC horizontal boring and millin...

AI Technical Summary

Problems solved by technology

[0005] 1. The magnet part of the dial indicator is not firmly adsorbed, and the dial indicator is prone to fall off during the detection process;

[0006] 2. During the rotation of the spindle, a certain centrifugal force is caused, which causes the dial indicator to fall off;

[0007] 3. The telescopic length of the dial gauge itself is limited. Even if it is adjusted to the maximum value, the diameter of the dial indicator still cannot meet the measurement standard of 500mm;

[0008] 4. Due to the problem of self-weight, the dial indicator will have a downward sagging tendency. During the detection process, even if there is no accident, the measured data still has certain errors, especially for the vertical axis of the spindle axis and the spindle box moving along the column. Degree data have a big impact

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