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Manufacturing method of axle for low-floor vehicle

A manufacturing method and low-floor technology, which is applied in the field of rail transit, can solve the problems of low yield rate, difficult axle and bridge casting process, and short service life, and achieve the effects of high yield rate of production, superior performance of finished products, and good mechanical properties

Active Publication Date: 2015-07-08
CRRC CHANGZHOU TECH MARK IND CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two types of axle bridges for low-floor vehicles at home and abroad: the first is the split axle bridge, which is assembled by welding and fastening parts. The assembly process is complicated and the reliability is low. The coaxiality of the neck is poor, which affects the safety and comfort of the vehicle; the second is the integral casting axle bridge, which is difficult to cast, internal defects are difficult to control, and the yield is low. poor, short life

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  • Manufacturing method of axle for low-floor vehicle
  • Manufacturing method of axle for low-floor vehicle
  • Manufacturing method of axle for low-floor vehicle

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Embodiment Construction

[0030] Taking the DZ1990 axle axle for low-floor vehicles as a specific example, the manufacturing method of the axle axle for low-floor vehicles of the present invention will be further described in detail.

[0031] Such as figure 1 , 2 As shown, an axle bridge for a low-floor vehicle includes a journal 1, an axle head 2, a mounting seat 3 and an axle body 4. There are two axle heads 2 and they are respectively arranged at both ends of the axle body 4. Each axle head 2 A journal 1 and a mounting seat 3 are provided, the journal 1, the shaft head 2, the mounting seat 3 and the shaft body 4 are an integral single part, and the axle bridge is integrally forged, and its manufacturing method includes the following steps in sequence:

[0032] (1) Select 50CrMo4 alloy steel bar as the raw material of the integral forged axle bridge, and perform performance testing. The performance testing includes raw material chemical composition testing, low-magnification microstructure testing, ...

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Abstract

The invention relates to a manufacturing method of an axle for a low-floor vehicle. The method comprises the steps of selecting materials; preparing a blank; forging and pressing through a forging die to form; normalizing; roughly processing; ultrasonically detecting flaw; thermally processing; performing shot blasting; correcting; half finely processing; performing aging treatment; finely processing; performing magnetic particle inspection; spraying. The axle manufactured by the method for the low-floor vehicle is that a neck, a shaft head, a mounting seat and a shaft body are single parts formed as a whole; the axle is integrally formed by forging, has less defects, is basically free of defects such as air pores, air shots and shrinkage, high in yield, outstanding in performance, and high in mechanical performance; due to the serial of advantages, the integrally forged axle is suitable for mass production and use.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a method for manufacturing an axle bridge for a low-floor vehicle. Background technique [0002] With the rapid development of urban rail transit, low-floor vehicles have become an important choice for urban transportation due to their advantages of economy, environmental protection, convenience, and comfort. As an important part of the bogie of a low-floor vehicle, the axle bridge supports the weight of the entire car body. The independent wheels connected at both ends of the axle bridge rotate independently under the drive of the motor to drive the vehicle. In order to ensure the safety and comfort of vehicle operation, there are high requirements on the structural performance of the axle bridge and the assembly accuracy with the independent wheels. [0003] At present, there are mainly two types of axle bridges for low-floor vehicles at home and abroad: the first is the spl...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00B60B35/00
Inventor 吴志强付传锋戚援宁烨
Owner CRRC CHANGZHOU TECH MARK IND CO LTD
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