Online flexible wheel hub internal diameter measuring apparatus based on laser automatic rotation scanning and application method thereof

Abstract

The invention discloses provides an online flexible wheel hub internal diameter measuring apparatus based on laser automatic rotation scanning and an application method thereof. The apparatus is characterized in that the apparatus comprises a master control system, a to-be-measured wheel hub, a servo motor, a laser displacement sensor, a precision power transmission device, a rotating shaft positioning device and a wheel hub placing reference surface. On the premise of wide measuring range (the to-be-measured diameter range difference can reach 20 mm), the measuring precision of +/- 5 micrometers can be reached through key technologies including automatic online error correction and automatic online compensation calibration etc., oil stain spots on the surface of the internal diameter of the wheel hub and abnormal values generated by abnormal burrs can be automatically eliminated, and the influence on measuring results can be avoided; besides, the installation is convenient, the maintenance and the usage are convenient, the cost is low, and compared with the conventional contact precision measurement (the to-be-measured diameter range difference is 2 mm), the measuring range is wide, and the apparatus can be applicable flexible measurement of various wheel hubs.

Description

technical field [0001] The invention relates to the technical field of wheel hub automatic size measurement in a hub production smart factory, in particular to an online flexible hub inner diameter measuring device based on laser automatic rotation scanning and an application method thereof. Background technique [0002] With the rapid development of intelligent manufacturing technology and information technology in smart factories, the construction of digital workshops based on flexible manufacturing automation production lines is the only way for manufacturing enterprises to transform and upgrade, and the market prospects are very broad. As the basic guarantee for flexible manufacturing automated production lines, automated dimension measurement technology is the top priority. As the main direction in the field of auto parts processing, the inner diameter measurement in the process of auto wheel hub machining is particularly important. [0003] At present, the inner diame...

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Problems solved by technology

[0003] At present, the inner diameter online measuring instruments on the market are divided into two types: contact type and non-contact type. The contact type inner diameter measuring instrument, such as the inductive probe type measuring instrument, has high measurement accuracy (±2µm), but it is sensitive to temperature and cannot automatically fit the workpiece online. Inner diameter, the abnormal value caused by the irregular shape of the inner diameter of the workpiece or the adhesion cannot be automatically eliminated, and the measuring axis cannot measure the inner diameter of the workpiece in an eccentric state, and the inner diameter range of compatible products is extremely small (within 2mm), and the cost is relatively high. It is suitable for High-precision measurement of the inner diameter of a single product

Non-contact inner diameter measuring instruments such as visual measuring instruments have a large range of compatible inner diameters, but their accuracy is low (±10µm), they are sensitive to light sources, the measurement results are greatly affected by light sources, their reliability is poor, and their cost is relatively high. They are suitable for Inner diameter measurement of products with low detection accuracy and a large detection inner diameter range

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