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AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsManabu Sugiura, Hidekazu Iwamori, Takayuki Kato
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A method of producing a hollow piston for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocating the piston, at least the head portion of the piston being hollow, the method comprising a step of preparing at least one piston blank by forging, which piston blank includes an engaging-portion-forming section which provides the engaging portion of the piston, and a head-portion-forming section which provides at least a part of the head portion of the piston, the at least one piston blank being prepared by a two-axes forging process which uses a forging die assembly including a set of two first dies which are movable relative to each other along a first axis which is one of two mutually perpendicular axes, and at least one second die which is movable along a second axis which is the other of the two mutually perpendicular axes. An apparatus for practicing the method is also disclosed.
A method of producing a hollow piston for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocating the piston, at least said head portion of the piston being hollow, said method comprising a step of preparing at least one piston blank by forging, which piston blank includes an engaging-portion-forming section which provides said engaging portion of the piston, and a head-portion-forming section which provides at least a part of said head portion of the piston, said at least one piston blank being prepared by a two-axes forging process which uses a forging die assembly including a set of two first dies which are movable relative to each other along a first axis which is one of two mutually perpendicular axes, and at least one second die which is movable along a second axis which is the other of said two mutually perpendicular axes.
A method of producing a blank for a hollow piston used for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocating the piston, at least said head portion of the piston being hollow, said method comprising a step of preparing at least one piston blank including an engaging-portion-forming section which provides said engaging portion of the piston, and a head-portion-forming section which provides at least a part of said head portion of the piston, said at least one piston blank being prepared by a two-axes forging process which uses a forging die assembly including a set of two first dies which are movable relative to each other along a first axis which is one of two mutually perpendicular axes, and at least one second die which is movable along a second axis which is the other of said two mutually perpendicular axes.
An apparatus for producing a blank for a hollow piston used for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocating the piston, at least said head portion of the piston being hollow, said apparatus comprising a forging die assembly which includes a set of two first dies which are movable relative to each other along a first axis which is one of two mutually perpendicular axes of the blank, and at least one second die which is movable along a second axis which is the other of said two mutually perpendicular axes.
Dependencies are inferred from the claim text.