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A kind of integral forming method of rectangular metal bellows

A metal bellows and integral forming technology, which is applied in the field of metal plastic forming, can solve the problems of multi-layer rectangular bellows that cannot obtain flexible compensation ability, fatigue life, and difficulty in satisfying no more than one weld seam, and achieve a wide range of use and a wide range of sizes. Good consistency and good processing flexibility

Active Publication Date: 2022-06-03
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The segmented tailor welding method is difficult to meet the strict requirements of no more than one weld, and it is impossible to obtain a multi-layer rectangular bellows with better flexibility, greater compensation capacity, and higher fatigue life

Method used

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  • A kind of integral forming method of rectangular metal bellows
  • A kind of integral forming method of rectangular metal bellows
  • A kind of integral forming method of rectangular metal bellows

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] The single-layer 316L material rectangular metal bellows, its structural diagram is shown in Figures 4a and 4b.

[0121] 1) Preparation of materials. After calculation, the inner diameter d of the cross section of the single-layer cylindrical blank

[0122] 2) Assembly: Since this example is a single-layer rectangular corrugated tube, this step is omitted.

Embodiment 2

[0129] The double-layer 316L material rectangular metal bellows, the schematic diagram of which is shown in Figures 8a and 8b.

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PUM

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Abstract

A method for integrally forming a rectangular metal bellows, comprising the following steps: material preparation: making a cylindrical tube blank; assembling: assembling each layer of cylindrical blanks sequentially and nesting them together; hydraulic bulging of a rectangular tube blank: making the cylindrical tube blank Put it into the rectangular billet bulging mold, and change the circular tube blank into a rectangular tube blank by hydraulic forming; the corrugated pipe semi-finished product hydraulic bulging: put the rectangular tube blank into the rectangular bellows hydraulic bulging mold to get a rectangular bellows Semi-finished workpieces; mechanical calibration: process mechanical calibration molds that are consistent with the outline of rectangular bellows, and obtain bellows samples that meet the design size requirements; edge trimming: remove mechanical calibration molds, and trim the excess material at both ends of rectangular bellows Physical removal; cleaning and packaging: After surface cleaning and packaging of the rectangular corrugated pipe workpiece, it is called a rectangular corrugated pipe product after the processing of the rectangular corrugated pipe workpiece is completed. The invention has the characteristics of simple and convenient operation and good product surface quality.

Description

A method for integral forming of rectangular metal bellows technical field The present invention relates to the technical field of metal plastic forming, particularly a kind of integral forming method of rectangular metal bellows. Law. Background technique [0002] A large number of non-revolving rectangular metal bellows are used in rectangular fan ducts, air-cooling unit turbine outlets, etc. one Generally speaking, the number of layers of rectangular corrugated pipes is 1 layer (single layer corrugated pipe), 2 layers (double layer corrugated pipe) and 3 layers... (multi-layer corrugated pipe). Compared with the cylindrical corrugated pipe, the rectangular corrugated pipe has obvious changes in the circumferential contour (rounded corners, straight sections), and the material at the rounded corners The material flow is difficult, and the deformation resistance is far greater than that of the straight section, which makes the overall forming extremely difficult. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/15B21D26/033
CPCB21C37/15B21D26/033
Inventor 刘静刘健左星煜刘强葛前任舒心
Owner XI'AN PETROLEUM UNIVERSITY