Welding method for lengthening H-shaped steel of railway freight platform wagon chassis

A technology of railway freight and welding methods, which is applied in welding equipment, arc welding equipment, workpiece edge parts, etc., can solve the problems of complicated welding process, poor welding performance of welding joint length, etc., and achieve reduction of manufacturing cost, material saving, and butt weld seam Quality and reliable results

Inactive Publication Date: 2013-03-20
CRRC BEIJING ERQI VEHICLE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its weldability is poor and the welding process is complicated

Method used

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  • Welding method for lengthening H-shaped steel of railway freight platform wagon chassis
  • Welding method for lengthening H-shaped steel of railway freight platform wagon chassis
  • Welding method for lengthening H-shaped steel of railway freight platform wagon chassis

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the drawings and embodiments.

[0021] In order to meet product design requirements, reduce manufacturing costs, and ensure the quality of extension welding, the present invention provides a welding method for H-shaped steel extension for the underframe of a railway freight flat car. , The side beams are welded with rigid extensions, including the following steps:

[0022] 1) Such as figure 2 , image 3 As shown, according to the preset length requirements of the H-shaped center beam or side beam of the railway freight flat car, the H-shaped steel is cut according to the preset length, and the H-shaped steel web and wing surface are provided with blunt edges for extension. Groove

[0023] Among them, the groove on the web is V-shaped (such as figure 2 As shown), the groove on the wing surface is X-shaped (such as image 3 As shown), the groove angles of the V-shaped and X-shaped grooves are both 50°~6...

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Abstract

The invention relates to a welding method for lengthening H-shaped steel of a railway freight platform wagon chassis. The welding method comprises the following steps: intercepting the H-shaped steel according to preset length; arranging grooves with truncated edges on a H-shaped steel web and a wing surface; cutting the grooves by using oxygen-propane flame, removing adhering slag, oxide skin and oily rust, and grinding the grooves by using a grinding wheel; taking the web as a datum plane, butt-jointing the web with the wing surface in a horizontal position, wherein a butt-joint staggered edge of a flange and the web is not more than 1mm and a height difference between an upper wing surface and a lower wing surface of a butt-joint connector is not more than 1.5mm; performing two-sectional positioning welding on the web; after the positioning welding is qualified, welding; respectively welding end tabs and arc-collecting plates at two ends of the upper wing surface and the lower wing surface on the H-shaped steel; welding a butt welding seam on each side of the H-shaped steel by turning a crown block to a horizontal position; after welding, adopting the flame for cutting and removing the end tabs and the arc-collecting plates; reserving a 1-2mm step while cutting, and flatly grinding by using the grinding wheel; and when the staggered edge of the wing surface of the H-shaped steel is more than 1mm or the surplus height of seam exceeds 2mm, grinding an ultrahigh part and smoothly transiting the connector, thereby finishing the lengthening welding of the H-shaped steel.

Description

Technical field [0001] The invention relates to a welding method for parts and components of a railway freight flat car, in particular to a welding method for connecting an H-shaped steel for the underframe of a railway freight flat car. Background technique [0002] Railway freight flat cars include special flat cars for transporting various types of containers and shared flat cars for transporting goods such as tanks or containers. They occupy a dominant position in railway container transportation, and the annual market demand is about 10,000. The center beam of the container flat car, the center beam and the side beam of the shared flat car are all made of H-shaped hot-rolled steel, and their design lengths vary from 13000 to 15000 mm. When purchasing raw materials, the length of H-beam rolled by steel mills often does not exactly match the length required for the middle and side beams of the flat car. If the purchased size is too long, the remaining material waste will incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/235B23K33/00
Inventor 王秀琴田川金锋赵永军
Owner CRRC BEIJING ERQI VEHICLE CO LTD
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