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Manufacture of bridging crane main beam

A bridge crane and manufacturing process technology, applied in the direction of load hanging components, transportation and packaging, support structure, etc., can solve the problems of crane main girder deflection deformation, lifting weight drop, endangering safety, etc., to increase the cutting area, Low cost and long service life

Inactive Publication Date: 2009-09-09
傅萍 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the elastic deflection of the main girder is specified F ≤ L k 700 (calculated from the original camber), due to various reasons in the design, manufacture, and use, the main girder of the crane will be deflected and deformed. car", the lifting capacity drops, and even accidents occur, endangering safety

Method used

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  • Manufacture of bridging crane main beam
  • Manufacture of bridging crane main beam
  • Manufacture of bridging crane main beam

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Experimental program
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Embodiment Construction

[0010] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0011] The first step: preparation process:

[0012] Lift the crane main girder that has been completed according to the main beam manufacturing drawings and processes of the bridge crane, and position the lower cover plate at a height of 1.4-1.6 meters from the ground. Support the main girder and end girder with a supporting frame or pads to make them fall stably.

[0013] The second step: welding process:

[0014] Place the tensioner box 1 in the additional rectangular parallelepiped tensioner transition box 28, weld it into a whole piece, set some reinforcement plates as required, and then weld the whole piece to one end of the lower cover plate of the main beam 23, Rope head is connected hinge support 20 and is placed in the cuboid connection hinge support transition box 29 of setting up again, is welded into whole, and is welded on the ot...

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PUM

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Abstract

The invention discloses a manufacturing process of the main girder of a bridge crane, including preparation, welding, rope distribution, and tensioning. The welding process is as follows: welding the tensioner box and the additional tensioner transition box to form a whole , and welded on one end of the lower cover of the main girder, and then weld the rope head connecting the hinge support and the transition box of the added connecting hinge support into a whole, and welded on the other end of the lower cover of the main girder. In the rope matching process of the present invention, tin-based Babbitt alloy is used for the rope end to cast and fix the rope end in the square tapered inner cavity of the rope end casting opening. The process of the invention is easy to process and manufacture, low in cost and convenient in construction, and is suitable for manufacturing the main girder of bridge cranes with a lifting capacity of less than 100 tons. The main girder of the crane manufactured by the process of the present invention always maintains any value within the range specified by the national technical standards, increases the tangential area of ​​the main girder structure, improves the strength, static stiffness and lifting capacity of the main girder, saves steel materials, and reduces costs About 20%, at the same time can prolong the service life of the equipment.

Description

technical field [0001] The invention relates to a crane manufacturing process, in particular to a bridge crane main girder manufacturing process. Background technique [0002] Bridge crane is a special equipment widely used by industrial and transportation material enterprises. In order to ensure the performance requirements of the crane and avoid the phenomenon of "climbing" and "sliding" of the electric trolley as far as possible, the main girder of the crane must have a certain degree of camber. my country The crane manufacturing technical standard stipulates the upper camber of the main girder span when the main girder of the crane is unloaded. f 0 = L k 1000 + 0.4 - 0.1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C6/00
Inventor 傅萍傅昆傅国华
Owner 傅萍