Vehicle wheel set full-size measuring device precision automatic calibration mechanism and verification method thereof

Abstract

The invention relates to the technical field of numerical control lathe verification. The invention discloses a vehicle wheel set full-size measuring device precision automatic calibration mechanism.The mechanism comprises a base, a servo motor, a transmission gear box, a calibration shaft, a polygonal calibration wheel and an equivalent taper calibration wheel, wherein the base is arranged on anon-wheeling wheel lathe body; transmission gear box and base connection, wherein an output shaft of the servo motor is connected with an input end of the transmission gear box, the verification shaftis fixedly connected with the transmission gear box, the verification shaft is rotatably connected in the base, the equivalent taper verification wheels are respectively arranged at two sides of theverification shaft in an axial symmetry manner, and the polygonal verification wheels are respectively arranged at two end heads of the verification shaft in an axial symmetry manner. The invention also discloses a calibration method using the precision automatic calibration mechanism of the vehicle wheel set full-size measurement device. According to the invention, the measurement precision of the vehicle wheel set full-size measurement device can be automatically verified conveniently and quickly, a plurality of parameters can be verified at the same time, the operation is simple, the efficiency is high, and the accuracy is good.

Description

technical field [0001] The invention relates to the technical field of numerical control lathe calibration, in particular to an automatic calibration mechanism and a calibration method for the accuracy of a full-scale measurement device for a vehicle wheel set. Background technique [0002] At present, the wheel set tread repairing and processing equipment of domestic rail transit vehicles is mainly based on non-falling wheel lathes. The automatic measuring device on the tool post of the lathe, which can measure the wheel tread when necessary, and obtain relevant data to verify the geometric accuracy of the wheel tread processing. At the same time, for passenger locomotives and EMU wheelsets that require high precision, it is also necessary to measure the equivalent taper of the wheel set tread and wheel polygon data. When the measurement accuracy of the non-falling wheel lathe changes, it will lead to the distortion of the processed tread geometry, the equivalent taper and...

AI Technical Summary

Problems solved by technology

[0004] The existing calibration methods mainly have the following deficiencies: (1) The weight and size of the existing standard wheel sets used for calibration are equivalent to those of the actual vehicle wheels. higher

[0005] (2) The operation is cumbersome. It is necessary to manually transport the standard wheel set from the designated place to the non-falling wheel lathe. During the calibration process, the standard wheel set needs to be manually replaced. After the calibration is completed, the standard wheel set needs to be manually transported back to its original position. , bumps will inevitably occur during transportation, such as damage to the surface of the standard wheel set, which affects the accuracy of the calibration, and there is also a risk of damage to the equipment during transportation.

[0006] (3) The calibration efficiency is low, the accuracy and repeatability are average, the transportation and clamping process of the standard wheelset is time-consuming and laborious, the entire calibration process requires a lot of manpower, and requires a high degree of specialization of the operators; The standard wheel set has a large diameter and can only be formed by turning. However, large errors still exist after processing, which will have a certain impact on the calibration results. The repeated clamping process will also affect the repeatability of the calibration accuracy.

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