Single boom section molding tool for crane booms and single boom section production technology

Abstract

The invention provides a single boom section molding tool for crane booms and single boom section production technology. The single boom section molding tool for crane booms includes a boom rack supporting portion and a joint positioning portion, wherein two lower chord members (106) which are used for supporting a boom section (100) of a crane boom face to surfaces of upper chord members (105) so as to support a boom rack, the boom section (100) consists of the boom rack, and the joint positioning portion is used for positioning various joints of the boom section (100). Upper planes of the lower chord members are used as positioning planes when the joints are installed and welded, accordingly, the single boom section molding tool resolves the problem that a positioning reference selected by a vertical positioning clamping device of a tool of the prior art does not conform to a designed reference of a product, positioning heights of the lower chord members with different sections do not need to be adjusted, and the single boom section molding tool is convenient in use.

Description

technical field [0001] The invention relates to the field of hoisting machinery, and more specifically, to a jib section forming tool for a jib and a production process for a single jib section. Background technique [0002] With the continuous development of society, there are more and more manufacturers of tower cranes, and the competition is becoming more and more fierce. The production of tower cranes must be low-cost, high-capacity, and high-efficiency. The production process and technology of the jib section face new challenges. [0003] The production process of the single jib section of the boom of the tower crane in the prior art is as follows: [0004] 1. The upper and lower chord tooling welds the lower chord and the female joint. [0005] 2. The upper overall weaving welding tooling 200’ welds the upper and lower chords and webs, such as figure 1 As shown, the jib section 100' of the boom is only welded with a female joint at one end. [0006] 3. Joints, such...

AI Technical Summary

Problems solved by technology

[0014] 1. After the welding of the jib section of each boom is completed, the joint process cannot be performed until the next jib section is completed, and the jib joint process cannot be performed until all the jib sections of the jib are completed, so that a large number of semi-finished products are stocked on the production line. Occupies a large amount of production space, occupying more than 40% of the total

[0015] 2. The production process of the single boom section of the boom is complicated, it is inconvenient to match the welding joints, and the welding deformation of the structural parts is serious

[0016] 3. The number of jib sections of the single-time loading and unloading chain is large, which affects the production beat

[0017] 4. The production line is too long, the number of operators is large, the labor load of workers is heavy, the intensity is high, the production efficiency is low and the products are not interchangeable

[0019] 1. Since the diagonals of the quadrilateral formed by the hole centers of the four connector positioning seats on the lower chord of the boom section are required to be equal in length, the position accuracy of the four connector positioning seats of the tooling equipped in the prior art depends on manual work. Adjustment during tooling installation is difficult to meet the design requirements of the tooling, so the male joint of the jib section needs to be welded when the arm is closed, and the joint joint of the jib joint is low in efficiency, takes up a lot of space, and the product is not interchangeable sex

[0020] 2. The positioning reference selected by the vertical positioning and clamping device of the tooling does not match the product design reference. The design reference is the upper plane of the lower chord, and the positioning height of the lower chord of different sections is different. The positioning height needs to be adjusted, which is inconvenient to use

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