Manufacturing method of hinge point of pitched steel bridge
A manufacturing method and hinge point technology, applied in the direction of manufacturing tools, arc welding equipment, welding equipment, etc., can solve problems such as difficult to avoid welding cracks, poor precision control, etc., and achieve the effect of strengthening stability and controlling deformation
Active Publication Date: 2018-01-23
SHANGHAI ZHENHUA HEAVY IND
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a method for manufacturing hinge points of pitched steel bridges in order to overcome the defects that it is difficult to avoid welding cracks in the production of steel bridge hinge points in the prior art, and the precision control is poor
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[0030] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.
[0032] The invention discloses a method for manufacturing a hinge point of a pitched steel bridge. The method includes the following steps:
[0033] Step 1. Process each component of the pitch-type steel bridge, and design and process the shape of the joint groove between each component.
[0034] figure 1 It is a structural schematic diagram of the hinge point assembly in the hinge point manufacturing method of the pitching steel bridge ...
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Abstract
The invention provides a manufacturing method for a luffing steel bridge hinge point. The method comprises the following steps: S1, processing each part of luffing steel bridge, designing and processing the shape of butt joint grooves of the parts; S2, assembling hinge point assembly and pre-heating, hanging and positioning the hinge point assembly on a idler wheel shelf in a turning over mode; S3, building the welding fixture and preparing to weld; S4, welding the hinge point assembly in a turning over mode for many times and finishing manufacturing the hinge point assembly. The manufacturing method for the luffing steel bridge hinge point adopts the pre-heating, welding and thermal insulation processes for manufacturing the hinge point assembly, the manufacture precision of the hinge point assembly is effectively controlled, and the stability of the hinge point assembly is strengthened; the method can effectively control deformation of the hinge point assembly during the welding process.
Description
technical field [0001] The invention relates to the field of steel bridge hinge point manufacturing, in particular to a pitch type steel bridge hinge point manufacturing method. Background technique [0002] In the field of steel bridges, the manufacturing method of steel bridge hinge points has always been the top priority. For example, the Antwerp steel bridge in Belgium is 99m long, 21m wide, 22m high, and weighs about 1650 tons. [0003] Usually, the hinge point assembly is made of special materials such as C460 cast steel, C35 forged steel, and S355NL steel plate, and weighs about 50 tons. The cast steel and the S355NL cylinder are butt welded, with a thickness of 125mm. C35 forged steel and S355NL cylinder are fillet welded, and the welding thickness is 100mm, both of which are thick plate welding. The shape of this component is irregular, and the welding of C460 cast steel is the first time in China. How to avoid welding cracks and precision control are the key poi...
Claims
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IPC IPC(8): B23K9/18
CPCB23K9/173B23K9/18
Inventor 李森周力伟戴文秀高丽彬祝文军
Owner SHANGHAI ZHENHUA HEAVY IND