Online detecting method of spiral bevel gear machining process

Abstract

The invention provides an online detecting method of a spiral bevel gear machining process. The method comprises the following steps of 1, directly acquiring point cloud data of a gear on a gear machining machine tool by using a laser scanner; 2, pre-processing the point cloud data of the gear, converting the point cloud data into curve surface data with st1 format, and according to the curve surface data, building a reconstruction model of the detected gear; 3, taking the designed model of the gear as a reference target, re-positioning the reconstruction model of the gear; 4, making section lines of the reconstruction model and the designed model of the gear along the gear height direction and the gear length direction of the gear, and measuring the deviation value of the section lines. Online detection on a spiral bevel gear can be realized, and the gear is not required to be loaded or unloaded for multiple times in a detecting process, so that mounting error is avoided.

Description

technical field [0001] The invention relates to the technical field of gear processing, in particular to an online detection method for the processing process of large Gleason gears made of spiral bevel gears. Background technique [0002] Due to the advantages of large coincidence, stable transmission and high load capacity, large spiral bevel gear pairs are widely used in intersecting and intersecting shaft transmissions of various equipment. The core transmission system of machinery, etc. At present, there are two kinds of Gleason tooth system and Oerlikon tooth system commonly used, among which Gleason tooth system is more widely used. [0003] The manufacturing process of Gleason gears mainly includes rough milling, repairing, heat treatment, grinding, and finished product inspection. Among them, the cutting method of rough milling adopts the intermittent indexing method. The precision of tooth division depends on the precision of the gear division mechanism of the ma...

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Problems solved by technology

[0006] The gear meshing detection method is a qualitative inspection, and it is impossible to measure the specific deviation between the processed tooth shape size and the design size. It can only be repeated meshing inspection and tooth repair based on experience, so the processing cycle is difficult to guarantee. Blank scrap

Moreover, every meshing inspection and tooth repair requires repeated loading and unloading of the gears on the processing and inspection equipment, resulting in assembly errors

[0007] The three-coordinate measurement method also needs to remove the gear from the equipment, which cannot be detected online, and when the point is linearly fitted based on the principle of the least square method, there is a fitting deviation. To obtain a curve that matches the actual tooth surface, it is required to collect The data points are concentrated in a certain tooth length or tooth height direction, and because the tooth surface of the spiral bevel gear is a free-form surface, it is difficult to meet this requirement during measurement, so there is an uncontrollable deviation between the fitted curve and the actual tooth surface

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