Minor-diameter semicircle inner hole surface hardening inductor

Abstract

The invention relates to the technical field of heat treatment, in particular to a minor-diameter semicircle inner hole surface hardening inductor. The minor-diameter semicircle inner hole surface hardening inductor comprises an inductive head, an electric conduction tube, a cooling water pipe and a connecting plate; the minor-diameter semicircle inner hole surface hardening inductor is characterized in that the inductive head is in a bent hook type formed by bending a copper pipe and comprises two long edge sections, two short edge sections and a U type pipe, the short edge sections extend into workpiece semicircle inner holes, and parts, facing the semicircle inner holes, of the short edge sections are arc shapes matched with the semicircle inner holes; and a T-type magnetizer is clamped in the middle of the inductive head and is fixed to the inductive head through a connecting sheet. According to the minor-diameter semicircle inner hole surface hardening inductor, the problems about minor-diameter semicircle inner hole surface hardening heating is solved; the bent hook type inductive heating head is adopted, a valid ring formed by two parallel short edge sections is used for heating the semicircle inner holes, the induced current short circuit effect of the round inductive head is avoided, and the cross sections of the extending-in parts, close to the semicircle inner holes, of the short edge sections are arc; and the T-type magnetizer is installed, the induced magnetic field is more even, and the heating effect is better.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a surface quenching heating inductor with a small-diameter semicircular inner hole. Background technique [0002] When inductively heating inner semicircular holes such as brake shoes and bearing raceways, it is difficult to heat effectively by traditional heating methods due to the special shape of the surface to be heated. [0003] like figure 1 As shown, the prior art uses a circular inductor 14 when heating the workpiece 7 with a semicircular inner hole. The effective circle of the circular inductor 14 is circular (one turn) or spiral (multiple turns), and due to the short circuit of the induced current Effect, the current flows through the inner wall of the effective circle, the smaller the aperture (such as the diameter is less than Φ25mm), the larger the ratio of the outer diameter to the inner diameter, and the shorter the inner diameter, the lower the resistance, so most o...

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Problems solved by technology

[0004] In order to solve the problem of difficulty in heating due to the short circuit effect when the traditional circular inductor is quenching and heating the surface of the semicircle inner hole with a small diameter (especially the diameter is less than Φ25mm), this invention proposes a new type of inductor

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