Large inner gear ring induction quenching hardened depth quick detection method

Abstract

The invention relates to a large inner gear ring induction quenching hardened depth quick detection method. The method includes steps of grinding and polishing to enable the surface to be a mirror surface and specifically includes: after large inner gear ring induction quenching is finished and gear grinding process is already completed, randomly selecting two teeth at an inlet end of a gear ring induction head, using an angle grinder to grind away turning tool grains on the end faces and at the tops of the two teeth, and using the angle grinder to grind the end faces and the tops of the two teeth again, wherein depth of grinding of two times is 0.4-0.6mm; wiping off oil dirt and floating dust, and using cotton to dip a corrosive agent to wipe ground parts, wherein after corrosion lasts 10-30sec, a hardened layer is bright white, and a non-hardened area is grayish black, so that thermal treatment state is displayed; using a camera to photograph the thermal treatment state of the end faces, the tops and roots of the teeth, judging qualification if seeing from the pictures of the end faces, a continuous bright white area completely covers the tooth surface and the tooth roots, seeing from the pictures of the tooth tops, the continuous bright white area completely covers the tooth tops, and judging disqualification if not; subjecting ground areas to rustproof treatment.

Description

technical field [0001] The invention relates to the field of physical and chemical detection and quality verification of large wind power gearboxes, and is mainly applicable to on-site detection of the hardened layer depth of a large internal ring gear whose surface is hardened through an induction hardening process. Background technique [0002] Due to the high manufacturing cost of the large induction hardened inner ring gear of wind power equipment, and the surface hardening depth cannot be monitored through the furnace sample, currently only one rack in the same type of ring gear can be used as the detection object. The tooth is subjected to induction hardening with the same process as the corresponding batch of workpieces and then inspected to realize the quality control of the ring gear. The specific process is: cut a certain tooth in the sample ring gear according to the test requirements, and induction harden the rack with the same process as the batch of parts; cut ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rapid detection of the depth of the induction hardening layer of a large inner ring gear in view of the low detection efficiency, long time consumption and high cost of the current detection method, and the actual problem of only providing a reference for the heat treatment quality of the actual workpiece method