Machining device special for long and large bent-up steel bars of frame box bridge

Abstract

The invention discloses a machining device special for long and large bent-up steel bars of a frame box bridge. The machining device comprises a machine frame with an operating platform. A fixed formwork is installed on the operating platform. A movable formwork arranged at the position, corresponding to the fixed formwork, of the operating platform is driven by an ejecting device on the machine frame to move forwards and backwards. The working face between the fixed formwork and the movable formwork is of a curved surface structure with the same shape as the long and large bent-up steel bars.The machining device has the advantages of being simple and ingenious in structure and low in manufacturing cost. When the long and large bent-up steel bars are machined, only three operating workersare needed, the once machining and forming efficiency of the steel bars is high, and the design size and code standard can be reached at a time without repeated correction; and compared with a GW40 bending machine, work efficiency can be improved by 10 times or more, accumulative errors of ordinary bending machines in the working process can be avoided, and accidental errors in the manual operation process can also be avoided.

Description

technical field [0001] The invention relates to steel bar processing equipment, in particular to a special processing equipment for long and bent steel bars of frame box bridges. Background technique [0002] The frame box bridge of the Gucheng Coal Mine Special Railway Project has a total length of 740m, and the design of the box bridge adopts a reinforced concrete structure. The frame box girder of the reinforced concrete structure is equipped with 8 rows of steel skeletons per linear meter of box body, with a skeleton spacing of 125mm. Reinforcement bars N4 and N4-1 are arranged in the bottom slab skeleton, and steel bars N3 and N3-1 are arranged in the roof slab skeleton. These four types of steel bars are all Φ25 long and curved steel bars, with a length of about 15 meters; Φ25 steel bars require forward and reverse bending. These long and curved steel bars not only require strict dimensional accuracy, but also have many bending points. figure 1 Shown is the shape and ...

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Problems solved by technology

[0003] The conventional processing of these long and bent steel bars uses a bending machine of the model GW40. Five operators are required to work at the same time, and the bending machine has a large cumulative error. It is difficult for the finished steel bars after bending to meet the design requirements. Correction defects lead to large labor costs and low work efficiency

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