Process for producing built-up camshafts
AssigneeMusashi Seimitsu Kogyo Kabushiki Kaisha
InventorHideo Suzuki
Life of this patent
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Abstract
A built-up camshaft is fabricated by fitting cam disks on a hollow shaft, fitting shaft end caps over the ends of the hollow shaft, placing the resulting structure in a die, compressing the hollow shaft in the axial direction thereof inwardly from the opposite ends thereof thereby to carry out swaging tube expansion thereof to place all parts in a temporarily fixed state, and introducing a fluid under pressure into the hollow shaft thereby to carry out bulging and expansion of diameter at specific parts of the hollow shaft and obtain an integral built-up camshaft.
Claims12
A process for producing built-up camshafts, comprising the steps of fitting cam disks on a hollow shaft, fitting shaft end caps over the ends of the hollow shaft, placing the structure thus assembled in a die, and introducing a fluid under pressure into the hollow shaft thereby to subject the same to bulging and expansion of diameter at specific parts thereof and thereby to simultaneously join the cam disks and the shaft end caps integrally to the hollow shaft.
A process for producing built-up camshafts, comprising the steps of fitting cam disks on a hollow shaft, fitting shaft end caps over the ends of the hollow shaft, placing the structure thus assembled in a die, compressing the hollow shaft in the axial direction thereof inwardly from the opposite ends thereof thereby to carry out swaging tube expansion of the hollow shaft to place the cam disks and the shaft end caps in a temporarily fixed state, and introducing a fluid under pressure into the hollow shaft thereby to subject the same to bulging and expansion of diameter at specific parts thereof and to increase the joining strength of the cam disks and shaft end caps to the hollow shaft.
Dependencies are inferred from the claim text.