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Forging method of coupler knuckle for railway vehicle

A railway vehicle and coupler knuckle technology, which is applied in the field of forging coupler knuckles for railway vehicles, can solve the problems of inclusions and cracks, short service life, shrinkage and other problems, achieve long service life, reduce the risk of car accidents, and facilitate billet making Effect

Inactive Publication Date: 2009-10-21
CHONGQING CHANGZHENG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a forging method of a coupler knuckle for railway vehicles with a fine structure, high strength and toughness, and good fatigue performance, so as to solve the problems of air holes, shrinkage, inclusions, cracks, and short service life of the existing cast steel coupler knuckles. defect

Method used

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  • Forging method of coupler knuckle for railway vehicle
  • Forging method of coupler knuckle for railway vehicle
  • Forging method of coupler knuckle for railway vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as Figure 1 to Figure 5 As shown, taking the coupler knuckle for No. 16 railway vehicle as an example, the coupler knuckle for this railway vehicle has good forgeability. There is no doubt about the reliability of the forged steel knuckle, but it is impossible to directly forge the product. If forging With machine processing, it is able to produce qualified products. The coupler knuckle for railway vehicles weighs 62kg, so it must be forged on a 16t hammer or other large die forging equipment. The forging steps are:

[0035] (1) Prepare the material to obtain a certain length of blank. The material used is: 35CrMo, the weight of the feed is 72kg, the raw material is Φ160 bar, and the size of the blank is Φ160cm×456cm.

[0036] (2) Heating the billet, after the blank obtained by blanking is heated, free forging is carried out on the free forging anvil of the 16t hammer, so that the blank is subjected to preliminary deformation, and the rough blank of the shape and...

Embodiment 2

[0049] Example 2 of the present invention is the same as Example 1, except that the blanking size in step (1) is Φ160cm×451cm; the heating temperature in step (2) is 1050°C, and the forging temperature range is 850°C; The heating temperature is 1050° C.; the heat treatment of the coupler knuckle body blank for railway vehicles in step (5), that is, the normalizing temperature is 30° C. above Ac3 or Accm; the heat treatment of the coupler knuckle body blank for railway vehicles in step (7) is adjusted Quality treatment, that is, tempering after quenching, the quenching temperature is 830°C, and the tempering temperature is 500°C.

Embodiment 3

[0051] Embodiment 3 of the present invention is the same as Embodiment 1, except that the blanking size in step (1) is Φ160cm×461cm; the heating temperature in step (2) is 1150°C, and the forging temperature range is 1150°C; The heating temperature is 1150° C.; the heat treatment of the coupler knuckle body blank for railway vehicles in step (5), that is, the normalizing temperature is 50° C. above Ac3 or Accm; the heat treatment of the coupler knuckle body blank for railway vehicles in step (7) is adjusted Quality treatment, that is, tempering after quenching, the quenching temperature is 870°C, and the tempering temperature is 650°C.

[0052] The coupler knuckle for No. 16 railway vehicles forged by this method is as follows: Figure 4 and Figure 5 As shown, its various performance indicators can fully meet the requirements of heavy-duty and speed-increasing railway vehicles. Compared with cast steel coupler knuckles, there will be no inherent quality defects in casting pr...

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Abstract

The invention discloses a forging method of a coupler knuckle for railway vehicles. The coupler knuckle for railway vehicles is formed by forging, and coupler knuckle products for railway vehicles with qualified performance and size are forged by the working procedures of material preparation, heating and blank forming, die forging and forming, trimming, heat treatment, preliminary processing, heat treatment, shot blasting, fault detecting and machining. The forging method of the coupler knuckle for railway vehicles, in which the coupler knuckle for railway vehicles has compact texture, high toughness and good fatigue performance, solves the defects of air pore, shrinkage porosity, inclusion, crack, short service life and the like of the coupler knuckle of the existing cast steel vehicle coupler.

Description

technical field [0001] The present invention relates to a method for forging coupler knuckles for railway vehicles. technical background [0002] The coupler is a vehicle component used to realize the connection between the locomotive and the vehicle or between the vehicle and the vehicle, transmit traction and impact force, and keep a certain distance between the vehicles. The coupler is composed of three parts: the coupler head, the coupler body and the coupler tail. The thick part at the front end of the coupler is called the coupler head. Inside the coupler head, there are knuckle tongue, knuckle pin, lock lifting pin, knuckle tongue push iron and coupler lock iron. The rear of the coupler is called the coupler. In order to realize hooking or unhooking, and to connect or separate the vehicle, the coupler has the following three positions, that is, the three states of the coupler: locked position - the position where the knuckle of the coupler is blocked by the hook lock...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/20B23P23/04
Inventor 郑兴东何盛勇
Owner CHONGQING CHANGZHENG HEAVY IND
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