Linear guide rail precision detecting device and method

Abstract

The invention discloses a linear guide rail precision detecting device and method. The device comprises a bed, two linear guide pairs in parallel with each other are arranged at left and right sides of the bed respectively, a bridge stand is fixedly connected to the guide pairs and arranged on the guide pairs, a driver unit is arranged in left lower position of the bridge stand, a disk measuring rack is fixedly mounted in the middle of the bridge stand, seven non-contact displacement sensors are arranged on the measuring rack in a symmetrical manner and are aligned with the top center of a detected guide rail, left and right raceways in the upper of the detected guide rail, a reference side surface of the detected guide rail, a non-reference side surface of the detected guide rail and left and right sides, in the width direction, of the bottom of the detected guide rail respectively, a linear guide pair is arranged in the bottom of the bed, three identical axis-Z linear slide units which can move along the length direction of the bed independently are fixedly connected to the linear guide pair and arranged on the linear guide pair, and a carriage which can hold the detected guide rail is arranged on the slide units. The detecting device is simple in structure, the guide rail can be fixed needless of bolts, the manufacture cost is reduced, and the measuring efficiency can be improved.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a linear guide rail accuracy measurement device and a measurement method thereof. Background technique [0002] At present, the accuracy measurement of rolling linear guides is mostly carried out by manual measurement or contact sensors. When manually measuring the parallelism of the guide rail raceways, the guide rail is clamped on the fixture of the measuring flat plate, and the table base is connected to the reference surface of the guide rail side and the installation plane of the guide rail. Align, and align the meter head with the raceway surface of the guide rail, and then move the meter base to measure. The difference between the measured maximum and minimum values ​​is the parallelism error of the guide rail raceway. The quality requirements of the personnel are high and the repeatability of the measurement results is poor; the Chinese invention publication number C...

AI Technical Summary

Problems solved by technology

[0002] At present, the accuracy measurement of rolling linear guides is mostly carried out by manual measurement or contact sensors. When manually measuring the parallelism of the guide rail raceways, the guide rail is clamped on the fixture of the measuring flat plate, and the table base is connected to the reference surface of the guide rail side and the installation plane of the guide rail. Align, and align the meter head with the raceway surface of the guide rail, and then move the meter base to measure. The difference between the measured maximum and minimum values ​​is the parallelism error of the guide rail raceway. The quality requirements of the personnel are high and the repeatability of the measurement results is poor; the Chinese invention publication number CN103438839A, the name is: a linear guide rail precision automatic measurement device and its measurement method, the patent introduces the use of non-contact sensors to measure the guide rail accuracy, the sensor is in contact Pneumatic components are installed on the type sensor so that it does not touch the measured object during the non-working period. During the measurement, the standard slider equipped with this type of sensor moves at a certain interval to realize the measurement of the height and parallelism of the measured guide rail. , this method needs to make corresponding standard guide rails and standard sliders when measuring different types of guide rails, which increases economic costs and maintenance costs

[0003] To sum up, there are few measurement items covered by various guideway precision measuring instruments used at this stage, especially for the measurement of raceway-related precision, and the measurement efficiency, measurement accuracy and repeatability need to be improved.

Images