Manufacture method for curve plate of steel case girder
A production method and technology of curved plates, applied in the direction of manufacturing tools, auxiliary devices, auxiliary welding equipment, etc., can solve the problems of time-consuming and labor-consuming, different deformation of components, and poor controllability, so as to reduce the amount of correction and compensate The effect of welding shrinkage
Active Publication Date: 2015-02-04
CHINA 19TH METALLURGICAL CORP
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Problems solved by technology
[0005] Steel plate bending usually adopts the method of rolling or pressing the curved plate first, and then supporting and fixing it for assembly. After welding, due to the lack of controllability, the deformation of each component is different, and it needs to be corrected, which is time-consuming and labor-intensive.
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[0031] The present invention will be further described below in conjunction with accompanying drawing.
[0032] Such as figure 1 Shown, the present invention comprises the following steps:
[0033] A. Cut the steel plate that needs to be rolled according to the required length and open the butt groove; because the length of the steel box girder curve plate itself is long, affected by the rolling length, it is difficult to roll it at one time, so generally in Cut the steel plate in the length direction, which is the axial direction of the curved surface after curling. In the subsequent process, each part is welded into a whole, that is, a large curved surface is curled and formed in sections.
[0034] B. Roll the cut steel plate according to the design direction. The steel box girder curve plate is generally hyperbolic. Therefore, the rolled steel plate is divided into two types: inner arc plate 1 and outer arc plate 2. Inner arc plate 1 is in the The stiffener 3 is welded to...
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The invention discloses a manufacture method for a curve plate, and particularly relates to the manufacture method for the curve plate of a steel case girder. The invention provides the manufacture method for the curve plate of the steel case girder with a decreased correction amount or without correction on the constructional element of a finished product, and since the method of internal release and external shrink is adopted on a coiled steel plate, i.e., the inner radian semi-diameter of an inner radian plate is expanded, the outer radian semi-diameter of an outer radian plate is decreased, the replenishment control on a prior welding shrink amount is carried out on the curve plate. Therefore during a subsequent welding process, a welded shrink amount is right compensated by the reserved compensation amount of the part. The size of a final formed curve plate of the steel case girder is much closer to a designed size, and thus a correction amount is reduced or even correction is not needed. The split joint of the curve plate and the welding of a reinforcing rib can be carried out on a deformation-resistant jig frame, the compensation amount is reserved on the clamp arc plane of the deformation-resistant jig frame, thus the curve plate can be subjected to operation according to a radian during coiling, and subsequent welding shrink is effectively compensated.
Description
technical field [0001] The invention relates to a method for manufacturing a curved plate, in particular to a method for manufacturing a steel box girder curved plate. Background technique [0002] Steel box girders are widely used in large bridges due to their simple structure, easy manufacture, and good wind resistance. The appearance of the bridge is mainly streamlined and flat wing-shaped, and the bottom plate is mostly sloped or curved, and full-length stiffeners are installed. . The common steel box girder bottom plate adopts a hyperbolic design, which requires high requirements for deformation control caused by welding during the manufacturing process. [0003] Welding deformation is inevitable in welding manufacturing. It not only affects the appearance quality and dimensional accuracy of the structure, but also seriously affects the mechanical properties of the structure and reduces the bearing capacity of the structure. Especially in the welding of curved structu...
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IPC IPC(8): B23P15/00B23K31/02B23K37/04B21D5/00
Inventor 冉懿周胜杨海军杜光辉谢斌
Owner CHINA 19TH METALLURGICAL CORP