Back to results
US 11,697,881 B2Granted
Manufacture of pipes
AssigneeCommonwealth Scientific and Industrial Research Organisation
InventorsMahnaz Jahedi, Stefan Gulizia, Bill Tiganis, Caixian Tang, Saden Zahiri
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method of manufacturing a pipe, which method comprises cold-gas dynamic spraying of particles onto a suitable support member thereby producing a pipe, and separating the pipe from the support member.
Claims20
A method of manufacturing a pipe, the method comprising:
- pre-heating a mandrel, the mandrel made of a single material having a coefficient of thermal expansion;
- cold-gas dynamic spraying of particles of at least one of titanium or titanium alloy directly onto the material of the pre-heated mandrel to produce the pipe;
- and
- allowing the pre-heated mandrel and the pipe to cool prior to removal of the pipe from the mandrel,
- wherein the coefficient of thermal expansion of the pre-heated mandrel material is greater than the coefficient of thermal expansion of the pipe, so that separation of the pipe from the pre-heated mandrel takes place by contraction of the pre-heated mandrel away from the pipe when the pre-heated mandrel and the pipe are allowed to cool.
2 more elements
A method of manufacturing a pipe, the method comprising:
- pre-heating a mandrel formed entirely of a material having a first coefficient of thermal expansion, the material of the mandrel defining an outer surface of the mandrel;
- cold-gas dynamic spraying particles of a second material onto the outer surface of the pre-heated mandrel to produce a pipe such that an inner surface of the pipe forms on the outer surface of the pre-heated mandrel, the second material comprising titanium or a titanium alloy and having a second coefficient of thermal expansion;
- and
- allowing the pre-heated mandrel to contract away from the inner surface of the pipe as the pre-heated mandrel and the pipe cool prior to removal of the pipe from the mandrel such that a difference between the first coefficient of thermal expansion and the second coefficient of thermal expansion separates the mandrel from the pipe.
1 more element
A method of manufacturing a pipe, the method comprising:
- pre-heating a mandrel, the mandrel having an inner surface or core and an outermost surface, the mandrel formed of a material having a first coefficient of thermal expansion at the inner surface or core and the outermost surface thereof;
- cold-gas dynamic spraying particles of a second material onto the mandrel to produce a pipe such that an inner surface of the pipe forms on the outermost surface of the mandrel, the second material comprising titanium or a titanium alloy and having a second coefficient of thermal expansion;
- and
- removing the pipe from the mandrel after the pipe and the mandrel have cooled such that a difference between the first coefficient of thermal expansion and the second coefficient of thermal expansion separates the mandrel from the pipe.
1 more element
Dependencies are inferred from the claim text.