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Near-net forging forming method of railway vehicle coupler knuckle

A technology for forging molding and railway vehicles, which is applied to metal processing equipment, etc., can solve the problems of forging knuckle manufacturing difficulties and complicated manufacturing processes, and achieve the effects of saving machining workload, high forming precision, and reducing heating times

Active Publication Date: 2016-11-09
JILIN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the difficult problems of forging knuckle manufacturing and complicated manufacturing process, and proposes a method for near-clean forging of railway vehicle coupler knuckles

Method used

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  • Near-net forging forming method of railway vehicle coupler knuckle
  • Near-net forging forming method of railway vehicle coupler knuckle
  • Near-net forging forming method of railway vehicle coupler knuckle

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0037] Such as Figure 1-6 As shown, the railway vehicle coupler knuckle of the present invention has a near net forging forming method, comprising the following steps:

[0038] Step (a), material preparation: according to the product model, the round steel of the corresponding specification is cut to a certain length with a band saw;

[0039] Step (b), heating: using 1500KW intermediate frequency induction heating equipment to heat the billet to 1150°C±20°C;

[0040] Step (c), prefabricating the blank: placing the heated blank on an 800-ton multi-directional forging device for multi-directional forging to prefabricate the blank.

[0041] Step (d), blank pre-forging: the pre-fabricated blank is closed forged in the pre-forging die on the 2000-ton multi-directional forging equipment, and pre-forged into a blank of a certain shape and size;

[004...

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Abstract

The invention discloses a near-net forging forming method of a railway vehicle coupler knuckle. The problems that forging forming of the railway vehicle coupler knuckle is difficult, and the machining and manufacturing process is complex are solved. The near-net forging forming method comprises the steps of material preparation, heating, prefabrication of blanks, preforging, closed die-forging, waste heat quenched-tempered heat treatment, finish machining, flaw detection and the like. A closed die-forging technology is adopted so that near-net forming of the coupler knuckle can be achieved, energy and materials are saved, the outer contour shape and size do not need to be machined, and the utilization ratio of the materials can reach 92% or above. In the whole forming process, workpieces are always in a three-dimensional stress state, and products have a compact structure, high toughness, good fatigue performance and long service life. The defects of air holes, shrinkage porosity, inclusions, cracks and the like in existing casted coupler knuckles are overcome, and the problems of complex process and difficult forming in the existing coupler knuckle forging manufacturing process are solved. The near-net forging forming method is simple in manufacturing process, high in material utilization rate and suitable for mass production and manufacturing of railway vehicle coupler knuckle products of various types.

Description

technical field [0001] The invention belongs to the technical field of plastic forming of complex parts, and in particular relates to a near-clean forging forming method for coupler knuckles of railway vehicles. Background technique [0002] The coupler of a railway vehicle is a key part connecting the railway locomotive and the vehicle and the vehicle, and the main part of the coupler part is the knuckle, so the coupler is a key traction component of the railway vehicle, and its performance is directly related to the operation safety and quality of the railway train. reliability. With the continuous development of my country's railway transportation in the direction of high speed and heavy load, the longitudinal impact force of the train has increased sharply, the friction and wear of the coupler knuckle contact surface is serious, and the performance of the coupler knuckle has become more and more difficult to meet the requirements of modern railway transportation, serious...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/04B21J1/06B21J5/02B23P15/20
Inventor 陈庆敏岳岩何东野
Owner JILIN UNIV
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