Method for forming friction welded compression based tubular structures
OwnerIsrael Stolinventor
Life of this patent
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Abstract
A method of making a compression based tubular structure having at least one structural joint using the friction welding process to improve the durability of tubular structures and structural integrity via increased resistance to tension and fatigue type loading and resistance to corrosion. A method of making a compression based tubular structure having at least one structural joint using the friction welding process is provided. In addition, a compression based tubular structure is provided. The compression based tubular structure comprises at least one tubular structure joint, at least one pair of flanges that surround each tubular joint, and a plurality of tension rods that connect the pair of flanges that surround the tubular structure joint.
Claims22
A method of making a compression based tubular structure comprising the steps of:
- machining square a first end and a second end of a first pipe;
- machining square a first end and a second end of a second pipe;
- friction welding the second end of the first pipe to the first end of the second pipe to create a first friction stir welded joint;
- machining square the first end of the first pipe and the second end of the second pipe;
- machining square a flanged-end of a first flange;
- friction welding the flanged-end of the first flange to the first end of the first pipe to create a second friction stir welded joint;
- machining square the second end of the second pipe;
- machining square a flanged-end of a second flange;
- friction welding the flanged-end of the second flange to the second end of the second pipe to create a third friction stir welded joint;
- connecting a plurality of tension rods between the first flange and the second flange;
- and
- stretching the plurality of tension rods during assembly to place in compression the first pipe, the second pipe, and the first stir welded joint therebetween.
A method of making a compression based tubular structure comprising the steps of:
- machining square a first end and a second end of a first pipe;
- machining square a first end and a second end of a first flange;
- friction welding the first end of the first pipe to the second end of the first flange to create a first friction stir welded joint;
- machining square a first end and a second end of the second pipe;
- machining square a first end and a second end of a second flange;
- friction welding the second end of the second pipe to the first end of the second flange to create a second friction stir welded joint;
- machining square the second end of the first pipe;
- machining square the first end of the second pipe;
- machining square the first end of the first flange;
- machining square the second end of the second flange;
- and
- friction welding the second end of the first pipe to the first end of the second pipe to create a third friction stir welded joint;
- and
- connecting a plurality of tension rods between the first flange and the second flange;
- and
- stretching the plurality of tension rods during assembly to place in compression the first pipe, the second pipe, and the first stir welded joint therebetween.
A compression based tubular structure comprising:
- two pre-stressed pipe sections;
- a joint joining the two pre-stressed pipe sections at adjacent ends thereto;
- a pair of monolithic flange/pipes joined to each opposing end of the two pre-stressed pipe sections;
- and
- a plurality of stretched tension rods connected between the pair of monolithic flange/pipes to place in compression the two pre-stressed pipe sections and the friction stir welded joint therebetween.
Dependencies are inferred from the claim text.