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A heat treatment method for the spline shaft head of the rotating shaft of the shield machine

A heat treatment method and shield machine technology, applied in heat treatment furnaces, heat treatment equipment, improvement of process efficiency, etc., can solve problems such as complex surface structure of the shaft, difficult process to meet technical requirements, large influencing factors of induction hardening process, etc.

Active Publication Date: 2019-12-24
ZHUZHOU TIANLI FORGING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The surface structure of the shaft is complex, and the induction hardening process has a large influence factor. From the perspective of heat treatment process, the process is difficult to meet the technical requirements

Method used

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  • A heat treatment method for the spline shaft head of the rotating shaft of the shield machine
  • A heat treatment method for the spline shaft head of the rotating shaft of the shield machine
  • A heat treatment method for the spline shaft head of the rotating shaft of the shield machine

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Embodiment Construction

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0030] Such as Figure 1-Figure 5 As shown, the embodiment of the present invention discloses a heat treatment method for the spline shaft head of the shaft of the shield machine, including the following steps:

[0031] 1) Install the positioning tool for the positioning of the shaft of the shield machine on the induction hardening machine.

[0032] 2) Hoist the shaft of the shield machine on the induction hardening machine tool. In order to ensure that the spline shaft head 1 of the shaft of the shield machine can be heated evenly during the quenching process, in this embodiment, the spline shaft head 1 of the shaft of the shield machine It is rotatably socketed in the quenching sensor 7 of the high-frequency induction hardening equipment. During ...

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Abstract

The invention discloses a heat treatment method of a spline shaft head of a rotating shaft of a shield tunneling machine. The heat treatment method comprises the following steps of: 1) quenching the spline shaft head with high frequency induction quenching equipment, 2) performing spray quenching with polymer quenching liquid, and 3) performing tempering: holding the temperature at 180-260 DEG C for 1.5h-4.5h, and then performing air cooling. The effective depth of quenching zones of tooth roots of the spline shaft head after heat treatment is 0.7mm, the surface hardness of the spline shaft head after the heat treatment is HRC 50-55, the mean surface hardness is HRC 53, and design requirements are met.

Description

technical field [0001] The invention relates to the field of heat treatment of rotating shafts, in particular to a heat treatment method for a spline shaft head of a rotating shaft of a shield machine. Background technique [0002] The shaft of the shield machine is a product used in the field of rail transit infrastructure construction. It is mainly used as the transmission part of the geared motor of the shield machine for excavating tunnel equipment. The design length of the general shaft is 841mm-1600mm, and the hollow shaft device is used to reduce the weight. The material is 40CrNiMoA, the outer diameter is φ95-φ155mm, the tip diameter of the spline shaft head at the end is φ94.4mm, the tooth root diameter is φ88.4 mm, the modulus is 3, the number of teeth is 30, and the spline height is 41 mm , the teeth are required to be hardened, the depth of the hardened layer at the tooth root is 0.5-1.0mm, and the surface hardness of the tooth top is HRC50-55. The surface struc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/10C21D9/00
CPCC21D1/10C21D9/0068Y02P10/25
Inventor 郑业方赵彦民陈玲张旭东马连喜
Owner ZHUZHOU TIANLI FORGING IND