Bell combined frog repair welding technique

A process method and frog technology, applied in the field of bell combination frog welding repair technology, to achieve the effect of stable and reliable performance, good quality after welding repair, and low requirements

Inactive Publication Date: 2009-10-07
重庆运达机电设备制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After on-the-spot investigation and on-site research, and through scientific and technological novelty search, there is no systematic research on the manual arc welding repair process method applied to Bell combined frog from the material welding process itself at home and abroad, and its application on the operation line Application evaluation of welding effect

Method used

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  • Bell combined frog repair welding technique
  • Bell combined frog repair welding technique
  • Bell combined frog repair welding technique

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Embodiment Construction

[0023] Before performing welding repair, the quality judgment of the damaged part of the bell combination frog should be carried out first:

[0024] 1. Do not weld and repair any part of the Bell combination frog that is broken.

[0025] 2. Confirm the damage degree of wing rail and center rail respectively:

[0026] (1) A small amount of defects or wear on the surface of the Bell combination frog will not affect the driving after grinding, and the maintenance "skylight" can be used to weld and repair online.

[0027] (2) When there are major defects such as surface wear, cracks, falling blocks, crushing and other major defects in Bell combined frogs, welding repairs can be made on the construction "skylight" timeline.

[0028] (3) When it is difficult to use the "skylight" time for welding repair, welding repair should be carried out offline or indoors.

[0029] (4) Welding repairs on the same part of Bell combined frogs should not exceed three times.

[0030] The process ...

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Abstract

The present invention presents a Bell combined frog repair welding technique, which respectively selects welding rods that are suitable for performing repair welding to austenite and bainite complex phase abrasion resistant steel by modification to Si-Mn-based, Cr-Mo-Ni alloy elements supplemented, supplemented rare earth alloy and V [0] Ti, to perform cold welding repair welding to center rail of the Bell combined frog, and selects chromium molybdenum vanadium steel surfacing electrode, to performing thermal welding repair welding to wing rail of the Bell combined frog. The method uses a 200A small-sized arc-welding power supply to complete the repair welding without any large-scale special welding complete plant. The repair welding process is more simple, because preheating is not needed before welding the center rail of the Bell combined frog, a buffer layer is not needed to weld in repair welding of the center rail and the wing rail, and the post-weld heat treatment is not needed after the welding of the wing rail. The technique is easy to grasp, has low requirement to the repair welding operators, and has low cost, high efficiency, good quality after repair welding, and stable and reliable performance.

Description

technical field [0001] The invention relates to a manual arc welding repair process method of a Bell combined frog made of a core rail made of austenite-bainite steel and a wing rail made of U75V (PD3) high-carbon rail steel. Background technique [0002] The railway frog is an important part of the railway operation line, and it is the most frequently damaged part in the railway structure. Since the implementation of my country's railway speed-up strategy, the Ministry of Railways has widely replaced and promoted the application of Bell combined frogs with advantages such as stable structure, high strength, less wear, and good ride comfort on existing operating lines and newly built lines. However, with the continuous improvement of railway speed and the increasing load capacity, Bell composite frogs inevitably have defects such as surface wear, cracks, peeling off blocks, and crushing. At present, the best solution is to repair them. Manual arc welding repair. [0003] B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/235B23K9/095B23K35/24B23K101/26
Inventor 朱亚云郑勇周兴平魏虎肖勇刘忠伦李红
Owner 重庆运达机电设备制造有限公司
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