Production technology of box girder of crane

A production process and crane technology, applied in the direction of manufacturing tools, metal processing equipment, arc welding equipment, etc., can solve the problem of weak bending resistance, shear resistance and local compression capacity of the flat web girder, which cannot adapt to the growing needs of the flat web. Long manufacturing cycle and other issues, to achieve the effect of small welding deformation, improve the economic benefits of the enterprise, and small residual stress

Inactive Publication Date: 2015-03-11
ANHUI WEISA HEAVY MACHINERY
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AI Technical Summary

Problems solved by technology

The box girder is one of the basic forms of the metal bridge frame of the bridge crane. At present, the flat web box girder is commonly used. In the prior art, the flat web is welded with stiffeners to avoid local instability, but the welding residual At the same time, the st

Method used

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Embodiment Construction

[0019] A kind of production technology of crane box-type girder of the present invention is characterized in that, comprises the following steps:

[0020] (1) Raw materials are put into storage for standby: select appropriate raw materials according to the requirements, inspect them, and put them into storage for standby after passing the test;

[0021] (2) Scribing: draw the camber lines and contour lines of the upper and lower cover plates, web plates, rib plates, inner partitions and other plates on the raw materials according to the size requirements;

[0022] (3) Cutting: semi-automatic gas cutting and shearing of the raw materials drawn in step (2);

[0023] (4) Cleaning and correction: remove the cutting slag and other objects in the parts that need to be welded, and grind the welding groove, and correct the welded parts to meet the straightness requirements;

[0024] (5) Butt tailor welding: Splicing and fixing other plates other than the partition plate and the lower...

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Abstract

The invention discloses a production technology of a box girder of a crane. The production technology is characterized by comprising the following steps of (1) delivering raw material into a warehouse for standby; (2) scribing; (3) blanking; (4) cleaning and correcting; (5) butt welding; (6) assembling and welding separating plates; (7) assembling and welding a lower cover plate; (8) correcting and checking. By adopting the scheme, the production technology has the advantages that the technology is simple and reasonable; the rigidity of the girder is greatly improved; the submerged arc automatic welding technology is adopted for welding, so the welding deformation is small, the strength of welding seams is high, the residual stress is small, the bearing capability is improved, the service life of the girder is prolonged, the manufacturing cost is reduced, and the economic benefits of enterprises are increased.

Description

field of invention [0001] The invention relates to the field of crane manufacturing, in particular to a production process of a box-shaped main girder of a crane. Background technique [0002] As the main mechanical equipment for material lifting, transportation, loading and unloading or installation, cranes have been widely used in the development of my country's national economy. Strengthening the research and improvement of cranes is very important for improving the level of material lifting, transportation, loading and unloading or installation in our country. Significance. At present, the cranes widely used in machinery, metallurgy, transportation, electric power, coal, construction and other industries in China are mainly bridge cranes. The bridge frame of bridge cranes is the main load-bearing component, which mainly bears the weight of itself and the weight of lifting heavy objects. The box girder is one of the basic forms of the metal bridge frame of the bridge cran...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23K9/18
CPCB23P15/00B66C6/00
Inventor 马向阳
Owner ANHUI WEISA HEAVY MACHINERY
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