Bearing surface laser quenching device and method based on distributed three-dimensional light beam scanning

Abstract

The invention discloses a bearing surface laser quenching device and method based on distributed three-dimensional light beam scanning, and belongs to the field of metal material surface laser quenching. A laser device, a laser transmission optical fiber, a laser machining head and a robot arm are included. Laser beams emitted by the laser device sequentially pass through the laser transmission optical fiber and the laser machining head to arrive at the surface of a bearing roller bed, and the robot arm carries the laser machining head. The robot arm controls the light beam focus of the lasermachining head to correspond to the laser quenching initial position of the bearing roller bed. The device further comprises a partition plate, a cooling medium nozzle and a transposition machine. Asthe transposition machine drives a bearing workpiece to rotate at the constant speed, the position and the posture of the laser machining head are kept unchangeable, the laser machining head is constantly aligned with the surface of the bearing roller bed, and high-speed scanning is conducted on the whole bearing roller bed along with rotation of the bearing workpiece. The problem about 5-8 MW wind turbine generator large main shaft bearing roller bed surface softened belts is solved.

Description

technical field [0001] The invention belongs to the field of laser quenching of the surface of metal materials, and in particular relates to a laser quenching device and method for bearing surfaces without tempering soft bands; the invention relates to a laser surface strengthening method for bearing materials such as 42CrMo, Cr18Mo, G20Cr2Ni4A and the like. Background technique [0002] Large-scale wind power main shaft bearings are crucial to the safety and reliability of offshore wind turbines. They are subjected to instantaneous strong impacts and irregular direction-changing heavy loads, and have extremely high requirements for comprehensive mechanical performance and reliability. The domestic spindle bearing raceway adopts intermediate frequency induction hardening, which requires the depth of the hardened layer to be ≮5mm and the surface hardness to be ≮58~62HRC. ), unable to meet the service performance requirements of 5~8MW wind turbines. Fatigue spalling and corro...

AI Technical Summary

Problems solved by technology

Aiming at the deficiencies of the prior art, the present invention proposes a bearing surface laser quenching device and method based on distributed three-dimensional beam scanning to solve the problem of soft strips on the raceway surface of large-scale main shaft bearings of 5-8MW wind turbines

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