Method for manufacturing and controlling camber of crane main girder

A crane and camber technology, applied in manufacturing tools, welding equipment, metal processing, etc., can solve problems such as complex transfer, affecting material performance, and large demand for casting platforms, so as to avoid secondary damage, reasonable welding sequence, and low cost saving effect

Active Publication Date: 2015-05-13
大连船舶重工集团装备制造有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional method of domestic crane construction, especially the main girder construction, is to build the main girder of the crane with the casting platform as the horizontal reference, and control the camber of the main girder by adding adjustment pads in the middle of the girder and pyrotechnic orthopedic

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  • Method for manufacturing and controlling camber of crane main girder
  • Method for manufacturing and controlling camber of crane main girder
  • Method for manufacturing and controlling camber of crane main girder

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[0019] The following is a detailed description based on the structural diagram of a method for making and controlling the camber of the crane's main girder shown in the attached drawings: A method for making and controlling the camber of the crane's main girder, the specific steps are:

[0020] a) Tailor-weld angle steel or T-shaped material with the leftover material or material head cut from the plate, and preform all of them into a uniform length as the frame shape;

[0021] b) Weld the prefabricated frame profile to the embedded part 1 on the ground of the workshop, and calculate the reserved camber of the main beam of the crane;

[0022] c) Use theodolite to transfer all the reserved camber values ​​to each frame profile, and weld transverse profile 3 to this height;

[0023] d) Lay the main beam bottom plate 2 to match the reserved camber, and fix it with the tire frame as a whole;

[0024] e) Diaphragm 4 in the assembly beam, welded orthopedic;

[0025] f) Cover the top plate of t...

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Abstract

The invention relates to a method for manufacturing and controlling the camber of a crane main girder, and belongs to the technical field of crane structure manufacturing. The method comprises the steps that a web plate is welded to a connecting plate according to the longitudinal length and is cut and formed according to the reserved camber, all longitudinal long ribs on the web plate and the web plate are assembled and welded in place, an upper jig frame and a base plate are assembled after shaping and flattening are carried out, an inner transverse partition plate and the web plate are welded, longitudinal welding joints of the web plate and the base plate are formed, welding should be completed from the middle to the two sides gradually so as to control welding deformation, and the two sides of the girder are symmetrically welded to form the U-shaped girder. The method has the advantages that excessive materials and defective materials are used for manufacturing so that resources can be recycled and the cost can be saved; due to the rigid connection of the structure and the jig frame and the reserved camber value of the jig frame, the structural forming precision is completely controlled, secondary damage of flame distortion rectification to materials is avoided, and the welding sequence is reasonable.

Description

technical field [0001] A method for manufacturing and controlling the camber of a main girder of a crane belongs to the technical field of crane structure manufacturing. Background technique [0002] At present, the traditional method of domestic crane construction, especially the main girder construction, is to build the main girder of the crane with the casting platform as the horizontal reference, and control the camber of the main girder by adding adjustment pads in the middle of the girder and pyrotechnic orthopedics. The disadvantage of the traditional method is that the casting platform has a large demand and the transfer is complicated. The adjustment block cannot control the deformation of the structure, which affects the overall dimensional accuracy of the structure, and the pyrotechnic orthopedic affects the performance of the material. Contents of the invention [0003] In view of the defects existing in the prior art, the object of the present invent...

Claims

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Application Information

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IPC IPC(8): B23K31/02
CPCB23K31/02B23K2101/28
Inventor 徐志升周伟胡大勇周巍嵬郝振兴林森
Owner 大连船舶重工集团装备制造有限公司
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