Preassembly-free manufacturing process for main beam of large gantry crane
A manufacturing process and gantry technology, which is applied in the pre-assembly process of the main girder of the gantry crane. It can solve the problems that the pre-assembly process occupies a large area, it is difficult to lift out the tire frame in sections, and the working surface cannot be unfolded. easy effect
Inactive Publication Date: 2012-12-26
南通方正能源科技有限责任公司
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Problems solved by technology
[0003] The disadvantage of the above process is that the traditional pre-assembled process occupies a large area
The working face cannot be expanded, and the structures at the large joints are staggered, which makes it very difficult to lift out the tire frame in sections
Method used
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[0010] like figure 1 , figure 2 Shown includes: the main girder is a box structure, including top cover plate 1, bottom plate 2, web plates 3 on both sides, and internal frame structure. The specific structure is as follows: webs 3 are arranged on both sides of the top cover 1 and the bottom 2 , and aggregates are arranged inside the top cover 1 , bottom 2 and web 3 . In this process, the height of the main girder is 12000mm, the width of the top cover plate is 5000mm, and the width of the bottom plate is 2950mm.
[0011] When setting out, place a 30mm-50mm process allowance in the top cover plate 1, the bottom plate 2, the longitudinal structure of the internal aggregate, and the lower openings of the web plates on both sides. The top cover plate 1, the bottom plate 2, and the web plates 3 on both sides are respectively assembled and welded with the corresponding internal aggregates to form plate unit parts. The margins at both ends of the top cover plate 1 and bottom pla...
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The invention discloses a preassembly-free manufacturing process for a main beam of a large gantry crane. In the process, the main beam is of a box-type structure, web plates are arranged on two sides of a top plate and a bottom plate, and aggregates are arranged in the top plate, the bottom plate and the web plates. The process is characterized by comprising the following steps of: performing allowance pay-off on the top plate, the bottom plate, all structural members of the internal aggregates and lower openings of the web plates of two sides at two ends of a fragment during pay-off, performing allowance cutting on each component, and assembling and welding according to the conventional process. The process has the advantages that: by using the process of substituting allowance scribing for fragmental preassembly, the working face can be smoothly unfolded without a big enough preassembly site, and the problem of difficulty in fragmental hoisting of a jig frame due to staggered structures at a big joint is solved. The total assembly operation is easier and faster.
Description
technical field [0001] The invention relates to a pre-assembly process of a main girder of a gantry crane, in particular to a process method for pre-assembling a large main girder structure of a gantry crane with margin markings instead of sections. Background technique [0002] The traditional pre-assembly scheme has two basic forms, one is to make no margin at the stage of the plate unit, and then carry out solitaire on the full-length tire frame to form the box girder; , the left and right segments are paired into a group to carry out solitaire and cut the margin. [0003] The disadvantage of the above process is that the traditional process requiring pre-assembly occupies a large area. The working face cannot be expanded, and the structure at the large joint is staggered, which makes it very difficult to lift out the tire frame in sections. Contents of the invention [0004] The main task of the present invention is to provide a precise section of the main beam, whic...
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IPC IPC(8): B23P15/00B66C6/00
Inventor 陈志峰姚金金
Owner 南通方正能源科技有限责任公司