Device for carrying out laser detection on straightness of hole axis

Abstract

The invention discloses a device for carrying out laser detection on the straightness of a hole axis, which is mainly structurally characterized in that a T-shaped draw bar passing through a wedge is arranged in a sleeve, the wedge is in contact with the inner wall of the sleeve, a spring is arranged among the front end face of the sleeve, the wedge and a T-shaped step of the draw bar, the bar head of the T-shaped draw bar is connected with a draw rope through a front end face, the draw rope is connected to a roller through a fixed pulley, the roller is connected with a motor, the rear end face of the sleeve is provided with an internal laser transmitter and a displacement position sensitive detector, a bracket on the outer edge of the rear end of the sleeve is provided with a corner position sensitive detector and an external laser transmitter, the corner position sensitive detector and the displacement position sensitive detector are respectively connected with light emitted by the internal and external laser transmitters, and the corner position sensitive detector and the displacement position sensitive detector are connected with a computer system through an A / D (analog-digital) converter. According to the invention, by using the laser technology and the position sensitive detectors, the changes of the hole axis in micro displacement and micro corner relative to a theoretical axis can be fully dynamically detected through light spot variation, so that the means of detecting the straightness of axes of deep-hole components is high in precision.

Description

technical field [0001] The invention relates to a straightness detection device for hole parts, in particular to a laser detection device for the straightness of a hole axis. Background technique [0002] Deep hole machining is complex and special, and it is difficult to observe the machining parts and tool conditions. The machining process is affected by many factors such as tool holder deformation, system chatter, workpiece material, drill parameters, cutting parameters, oil pressure, and difficulty in chip removal. The axis of deep-hole parts often deviates. Once the deviation reaches a certain level, the straightness error of the axis of the deep-hole parts will change sharply, resulting in adverse consequences such as drill bit damage, workpiece scrapping, low product accuracy, and unqualified quality. Since deep hole processing serves the equipment manufacturing industry, the quality of deep hole workpieces directly affects the development of the equipment manufactur...

AI Technical Summary

Problems solved by technology

[0004]The research on deep hole straightness detection and deviation correction technology at home and abroad continues to deepen, but compared with other measurement items, the straightness detection technology is lagging behind, especially in For the straightness detection of the hole axis of large and long workpieces, so far, there is no mature product for detecting the deviation of the straightness of the deep hole axis

In practice, workers often use calipers to measure the wall thickness along different radial directions at both ends of the hole to judge the straightness. This method cannot measure the internal axis deviation of the deep hole, that is, it cannot realize the deep hole parts The full continuous dynamic detection of straightness is very imprecise, and it is easy to fall into the misunderstanding of point-to-surface

However, some laser straightness testing instruments cannot realize the function of detecting micro-displacement changes and micro-rotation angle changes at the same time

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