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Step-link shaft superaudio induction quenching method and special induction coil thereof

An induction coil and induction hardening technology, which is applied in the field of ultrasonic frequency induction hardening of step shafts, can solve the problems of low production efficiency, overheating at sharp corners, and induction hardening cracking of step shafts, so as to shorten the processing cycle, reduce production costs, and ensure Effect of hardened layer depth

Inactive Publication Date: 2010-07-28
济南中森机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. It is easy to produce step shaft induction hardening cracking;
[0006] 2. Induction heating and quenching adopts two clamping, and the production efficiency is low;
[0007] 3. The excessive fillet R between the large-diameter shaft and the small-diameter shaft is generally heated by prolonging the heating time, which is easy to overheat and burn or quench the sharp corner.

Method used

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  • Step-link shaft superaudio induction quenching method and special induction coil thereof
  • Step-link shaft superaudio induction quenching method and special induction coil thereof
  • Step-link shaft superaudio induction quenching method and special induction coil thereof

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the technical solution of the present invention.

[0026] like figure 1 The step shaft shown includes a large-diameter shaft and a small-diameter shaft, and there is an excessive fillet between the large-diameter shaft and the small-diameter shaft. The present invention is used for the method of supersonic induction hardening of the above-mentioned step shaft, and a suitable induction hardening is selected according to the large-diameter shaft. Coil, then wrap the induction coil on the part that needs to be quenched, and make the step shaft rotate, the input voltage is 380V, the input power of the super-audio induction heating power supply is 150KW-250KW, and the oscillation frequency of the super-audio frequency induction heating power supply is 25 -40KHZ.

[0027] The method for s...

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Abstract

The invention discloses a step-link shaft superaudio induction quenching method. The step-link shaft comprises a large-diameter shaft and a small-diameter shaft; and a transition round corner is formed between the large-diameter shaft and the small-diameter shaft. The method comprises the following steps: selecting a suitable induction coil according to the large-diameter shaft; packaging the induction coil in a part which needs to be quenched; and rotating the step-link shaft, wherein the input voltage of the induction coil is 380V; the input power of a superaudio induction heating power supply is between 150 and 250KW; and the oscillation frequency of the superaudio induction heating power supply is between 25 and 40 KHZ. The invention also provides a special induction coil of the method. The special induction coil is provided with a bracket, two magnetic conductors and a plurality of groups of coils embedded in grooves of the magnetic conductors; the bracket is provided with an upper conducting surface and a lower heat conducting surface which are arranged in parallel and have arc-shaped cross sections; the two magnetic conductors are respectively arranged on the heat conduction surfaces; and the diameters of the heat conducing surfaces are the same as those of the large-diameter shaft. The step-link shaft superaudio induction quenching method and the special induction coil thereof have the advantages of ensuring the depth of a hardening layer of the step-link shaft, performing self-tempering by using afterheat, reducing a processing cycle and reducing production cost.

Description

technical field [0001] The invention relates to a step shaft super-audio frequency induction hardening method and a special induction coil thereof, belonging to the technical field of metal heat treatment technology and equipment. Background technique [0002] In the previous process, in order to achieve a hardened layer of 4-7mm on the step shaft, an intermediate frequency quenching machine tool must be used. The characteristic of the intermediate frequency quenching machine tool is that the depth of the hardened layer of the workpiece is 5-10mm. , it is impossible to complete the workpiece with 2-5mm hardened layer, so that it is impossible to realize the same equipment to complete the workpiece required by multiple processes. [0003] like figure 1 Shown is a stepped shaft, the stepped shaft includes a large diameter shaft and a small diameter shaft, and there is an excessive fillet R between the large diameter shaft and the small diameter shaft, wherein the difference b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/28C21D1/10
CPCY02P10/25
Inventor 虞泳渔于良郝炳琪
Owner 济南中森机械制造有限公司
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