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Shaft induction quenching induction coil and machining method

A technology of induction hardening and processing, which is applied in the field of induction coils, can solve the problems that the surface hardness is difficult to meet the technical requirements, the depth of the effective hardened layer is uneven, and it is easy to overheat or underheat, so as to increase the density, increase the heating temperature and heat penetration. Depth, range-reducing effects

Pending Publication Date: 2022-04-15
HUNAN NANFANG AVIATION HIGH ACCURATE DRIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the above-mentioned background technology, and propose a processing method for the synchronous induction hardening of the journal step end face and the outer circle of the stepped shaft, which solves the problem that the synchronous induction hardening of the journal step end face and the outer circle of the shaft is effective Difficulties such as uneven depth of hardened layer, easy overheating or underheating, uneven temperature, hardening soft zone, surface hardness difficult to meet technical requirements, etc.

Method used

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  • Shaft induction quenching induction coil and machining method
  • Shaft induction quenching induction coil and machining method
  • Shaft induction quenching induction coil and machining method

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Embodiment 1

[0030] see Figure 1-7 As shown, the present invention is a shaft type induction hardening induction coil, the outer ring of the induction coil 1 is provided with a water spray ring 2, and the inner ring line of the water spray ring 2 is provided with a plurality of water spray holes, and the water spray ring 2 has a concentration of 4 -6% PAG quenching liquid is sprayed on the workpiece; the induction coil 1 and the water spray ring 2 are connected to each other through the insulating connecting plate 3, and the insulating connecting plate 3 is correspondingly installed on the induction coil 1 and the water spraying ring 2 through screws and nuts , the inlet and outlet of the induction coil 1 are respectively connected with water pipes, and the water pipes are connected with the connecting arm;

[0031] Preferably, the inner ring of the upper end surface of the induction coil 1 is provided with a tapered guide groove not less than 120°, the lower end surface of the induction ...

Embodiment 2

[0034] A processing method for a shaft-type induction hardening induction coil, comprising the following steps:

[0035] Step 1: The step end face of the step shaft journal of the workpiece starts to be heated by high-frequency induction, and then water-cooled and quenched after heating;

[0036] Step 2: use pulse induction heating on the step end face of the workpiece;

[0037] Step 3: The outer circle of the journal of the workpiece is heated by continuous scanning from bottom to top.

[0038] Induction hardening is carried out on the stepped shaft through the shaft induction hardening induction coil, and the results are as follows: Figure 7 , the effective layer depth of the end face of the step is 1.6-2.5mm (technical requirements 1-3mm), the surface hardness is 57.0 (technical requirements ≥ HRC52.0); the effective layer depth of the outer circle of the journal is 1.8-2.3mm (technical requirements 1-3mm ), the surface hardness is 55.5 (technical requirements ≥ HRC52.0)...

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Abstract

The invention discloses a shaft induction quenching induction coil which comprises an induction coil body, the induction coil body is connected with a water spraying ring through an insulation connecting plate, an inlet and an outlet of the induction coil body are connected with water pipes correspondingly, and the water pipes are connected with connecting arms; the inner ring of the upper end face of the induction coil is provided with a conical guide groove not smaller than 120 degrees, the lower end face of the induction coil is provided with a guide step, and the bottom face of the guide step is an inclined face which forms an angle of about 10 degrees with the horizontal plane. By means of the machining method for synchronous induction quenching of the journal step end face and the outer circle of the step shaft, the problems that the effective hardening layer depth of synchronous induction quenching of the journal step end face and the outer circle of the shaft is not uniform, overheating or underheating is prone to occurring, the temperature is not uniform, a quenching soft area exists, and the surface hardness cannot meet the technical requirement easily are solved.

Description

technical field [0001] The invention relates to the technical field of induction coils, in particular to a shaft induction hardening induction coil and a processing method. Background technique [0002] Such as figure 1 For the stepped shaft shown, the raw material is 40CrNiMoA. The marked end face of the journal step and the outer circle (bearing installation position) need to be induction hardened. The effective hardening depth is required to be 1-3mm, and the surface hardness is required to be ≥ HRC52.0. The step end face of the journal of the stepped shaft is connected to the outer circle, and synchronous induction hardening is required. The induction hardening technology is difficult and the achievement rate of technical indicators is low. In general, the realization of induction hardening mainly uses the characteristics of electromagnetic induction with skin effect, which forms the surface heating and quenching of the workpiece. Induction heating will form a ring eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/28C22C38/18C22C38/22C22C38/44C21D1/42C21D1/667C21D6/00
CPCY02P10/25
Inventor 陈葵邱荣春胡林森黄俊琼胡云波朱美玲
Owner HUNAN NANFANG AVIATION HIGH ACCURATE DRIVE