A Stress Relaxation Correction Method for Stringer Structural Cylindrical Parts
A technology for stress relaxation and cylindrical parts, which is applied in the field of stress relaxation and shape correction, and can solve the problems that the inner wall of the stringer cannot be calibrated to the ideal size, etc.
Active Publication Date: 2015-09-09
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defect that the existing stress relaxation correction method cannot correct the shape of the inner cylinder wall of the stringer to the ideal size, and provide a stress relaxation correction method for the stringer structure cylindrical part, which can effectively reduce the The ellipticity of the outer diameter of the shaped part can eliminate the petal structure of the section caused by uneven bulging
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[0045] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0046] like figure 1 As shown, the embodiment of the present invention provides a method for stress relaxation correction of stringer structure cylindrical parts, the method needs as follows Figure 2 ~ Figure 4 A set of prefabricated shape-correcting tires is shown, the material is ZGlCr18Ni9Ti, after being cast and integrally formed, a cylindrical structure is machined, and grooves are processed on 8 equally divided positions to avoid stringers, and the bottom of the tire is assembled A lug can be extended to the inside of the stringer. Two lifting lugs are welded on both sides of the upper part of the mold tire, which is convenient for hoisting when correcting the shape. It is a fixed part, and the bottom of the mo...
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Abstract
The invention relates to a stress relaxation correcting method for a stringer structure cylindrical piece and belongs to the technical field of stress relaxation correcting methods. A size calculation method suitable for an assembled correcting mould is adopted to determine the size of the assembled correcting mould. Specifically, bulging correction coefficients are introduced, difference calculation (called as a difference calculation method) is adopted for supporting lug parts, and the overall size of the assembled correcting mould and the sizes of the supporting lugs are respectively calculated through the difference calculation method; in this way, the outer diameter ellipticity of the stringer structure cylindrical piece is effectively reduced, the bulging amount of the supporting lugs is made consistent with that of the assembled correcting mould, a petal-type section caused by inconsistency of the bulging amount of the supporting lugs and the bulging amount of the assembled correcting mould is avoided, and the size of the stringer structure titanium alloy cylindrical piece can be corrected to be ideal.
Description
technical field [0001] The invention relates to the technical field of stress relaxation and shape correction methods, in particular to a stress relaxation and shape correction method for stringer structure cylindrical parts. Background technique [0002] The stringer structure cylindrical part is composed of a cylindrical shell and a stringer. The cylindrical shell is welded by two semicircular titanium alloy plates with a wall thickness of 2mm. Eight stringers are evenly welded inside the cylindrical shell. , stringer width 30mm. Ovality requires ±0.2mm. After welding, the outer diameter of the cylindrical shell and the welded part of the stringer are deformed, and there is a large welding residual stress. When it is docked with the end frame, it is difficult to meet the welding step difference requirement of ±0.2mm. It is difficult to correct the tube wall at the stringer part to the ideal size by using the integrated stress relaxation correction mold tire. It is neces...
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IPC IPC(8): B21D1/08
Inventor 周野王永平李志勇蔡虎
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP