Heat treatment device for rotary support outer ring raceway

Abstract

The invention discloses a heat treatment device for a rotary support outer ring raceway. The heat treatment device comprises a cooling barrel, the upper end of the cooling barrel is symmetrically provided with two supporting columns, the two supporting columns are provided with a heating unit capable of ascending and descending up and down through a horizontal beam, the cooling barrel is divided into upper and lower two layers, and the upper layer of the cooling barrel contains cooling liquid and is further internally provided with a positioning unit capable of moving up and down and capable of rotating. According to the heat treatment device for the rotary support outer ring raceway, by means of the positioning unit, rotary support outer rings of various sizes can be placed, and heat treatment is performed on these rotary support outer rings at the same time, and the heat treatment efficiency of the rotary support outer ring raceway is greatly improved; and in addition, by means of the heat treatment device for the rotary support outer ring raceway, heating, heat preservation and cooling are concentrated on one device, three heat treatment processes of the heating, the heat preservation and the cooling are made to have good continuity, and the heat treatment effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of slewing bearing processing, in particular to a heat treatment device for the raceway of the outer ring of the slewing bearing. Background technique [0002] The slewing bearing is a new type of mechanical component. It consists of inner and outer rings, rolling elements, etc. The slewing bearing is a large bearing that can bear comprehensive loads. It can bear large axial and radial loads and overturning moments at the same time. It has multiple There are different models, but they all need rolling heat treatment. The raceways of the slewing bearings are all surface induction hardened, and the quenching hardness is guaranteed to be HRC55-62, which can reach a sufficient depth of hardened layer. Quenching is to heat the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), keep it warm for a period of time to make it fully or partially austenitized, ...

AI Technical Summary

Problems solved by technology

Quenching is to heat the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), keep it warm for a period of time to make it fully or partially austenitized, and then cool it at a cooling rate greater than the critical cooling rate. Rapid cooling to below Ms (or isothermal near Ms) for martensite (or bainite) transformation heat treatment process; therefore, it can be seen that quenching is divided into three continuous processes of heating, heat preservation, and cooling, so it must be processed during processing Only by ensuring continuity can the manufacturing strength be guaranteed; in addition, the existing heat treatment devices generally can only heat treat a single component, and cannot heat treat outer rings of various sizes at the same time, which will compromise the processing efficiency

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