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Calculation method for unfolding and unloading of Y-shaped symmetric crescent rib steel branch tube

A calculation method and symmetrical technology, which is applied in the field of Y-shaped symmetrical crescent rib steel bifurcation pipe expansion and blanking calculation, can solve the problems of many calculation steps, many calculation parameters, and complicated calculation process

Active Publication Date: 2018-06-29
DONGFANG ELECTRIC MACHINERY
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Problems solved by technology

The traditional unfolding and blanking calculation is carried out in the asymmetric bifurcation pipe model, which has many calculation parameters, many calculation steps and needs to be transformed back and forth in multiple coordinate systems, and the calculation process is extremely complicated

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  • Calculation method for unfolding and unloading of Y-shaped symmetric crescent rib steel branch tube
  • Calculation method for unfolding and unloading of Y-shaped symmetric crescent rib steel branch tube
  • Calculation method for unfolding and unloading of Y-shaped symmetric crescent rib steel branch tube

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] Such as Figure 4 As shown, the Y-symmetrical crescent-ribbed steel branch pipe passes through a main cone 1 and two branch cones 2, and a crescent plate 3 is welded between the two branch cones 2, the main cone 1, branch cones 2 and the crescent plate 3 are jointly welded to form a Y-shaped tubular structure, which has the following two structural characteristics, namely: 1) the steel branch pipe is completely symmetrical about the vertical plane where the bisector of the support cone angle is located; 2) the main cone and the support cone It has a co-cutting sphere whose intersecting lin...

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Abstract

The invention provides a calculation method for unfolding and unloading of a Y-shaped symmetric crescent rib steel branch tube. The method comprises the steps of establishing a coordinate system; establishing a cone surface equation of a main cone tube in a main cone tube coordinate system and a cone surface equation of a branch cone tube in the branch cone tube coordinate system of the cone tube;obtaining the coordinates of the intersecting line intersection point of the main cone tube and the branch cone tube in the main cone tube coordinate system and the branch cone tube coordinate systemrespectively; obtaining an intersection line equation of a plane of the main cone tube and the intersecting line; obtaining an intersection line equation of the plane of the branch cone tube and theintersecting line; obtaining the equation of a crescent plate plane in the branch cone tube coordinate system; solving the unloading of the main cone tube, and calculating a cone tessellation line family equation of the main cone tube; solving the unloading of the branch cone tube, and calculating a cone tessellation line family equation of the branch cone tube; deficiency error analysis and compensation of a cusp of the unloading of the branch cone tube are conducted; the method has the advantages that a complicated coordinate iterative transformation process is avoided, the calculation process is simple, the unloading precision is high, the unloading errors are compensated, and the risk of material shortage is avoided.

Description

technical field [0001] The invention relates to the technical field of water turbine design, in particular to a Y-shaped symmetrical crescent-rib steel bifurcated pipe expansion and blanking calculation method. Background technique [0002] Water diversion steel bifurcation pipe is an important hydraulic component in water diversion power station. In pumped storage power station, due to the high water head and complicated two-way operation conditions of the unit, the water diversion steel bifurcation pipe is particularly important and occupies a large share of the project cost. . Key manufacturing technologies such as blanking, forming, and welding of water diversion steel branch pipes are also where a pumped storage power station can gain a favorable position in market competition. The traditional unfolding and blanking calculation is carried out in the asymmetric bifurcated pipe model, which has many calculation parameters, many calculation steps and needs to be transform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/12
CPCG06F17/12G06F30/17
Inventor 熊欣李小兵
Owner DONGFANG ELECTRIC MACHINERY
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