摘要:
There is provided a lighting device excellent in mass productivity and capable of significantly reducing a production cost and allowing easy provision of a light-weight and large-size lighting device as well as improving a degree of freedom in choosing materials and exhibiting an adequate heat dissipation effect. A heat dissipation portion is obtained by press-working a metal plate. For example, the heat dissipation portion is configured by press-deforming the metal plate into a substantially dome-like shape having a vertically extending peak portion and a vertically extending valley portion that are peripherally and consecutively formed, by repeatedly bending the metal plate along a circumferential direction into a wave shape and concurrently warping the metal plate in an axial direction such that the outer peripheral side of the metal plate is positioned closer to the tip in the axial direction than the central side thereof.
摘要:
There is provided a lighting device excellent in mass productivity and capable of significantly reducing a production cost and allowing easy provision of a light-weight and large-size lighting device as well as improving a degree of freedom in choosing materials and exhibiting an adequate heat dissipation effect. A heat dissipation portion is obtained by press-working a metal plate. For example, the heat dissipation portion is configured by press-deforming the metal plate into a substantially dome-like shape having a vertically extending peak portion and a vertically extending valley portion that are peripherally and consecutively formed, by repeatedly bending the metal plate along a circumferential direction into a wave shape and concurrently warping the metal plate in an axial direction such that the outer peripheral side of the metal plate is positioned closer to the tip in the axial direction than the central side thereof.
摘要:
The present invention provides a caulked assembly to be manufactured at low cost, and maintain sufficient caulking strength, and the manufacturing method and apparatus thereof. The manufacturing method comprises steps of forming a mounting hole for inserting and assembling a columnar body in a metal plate body, and forming a thick part along an inner circumferential edge of a mounting hole; forming a circumferential groove with a predetermined depth at an assembled position of a outer circumferential surface of the columnar body inserted into the mounting hole; inserting the columnar body into the mounting hole to set to the assembled position where the thick part is opposed to the circumferential groove; and caulking for compressively pressing the thick part from an axial direction of the columnar body to plastically deform the thick part in a center direction of the mounting hole to bite the thick part into the circumferential groove.
摘要:
The present invention provides a caulked assembly to be manufactured at low cost, and maintain sufficient caulking strength, and the manufacturing method and apparatus thereof. The manufacturing method comprises steps of forming a mounting hole for inserting and assembling a columnar body in a metal plate body, and forming a thick part along an inner circumferential edge of a mounting hole; forming a circumferential groove with a predetermined depth at an assembled position of a outer circumferential surface of the columnar body inserted into the mounting hole; inserting the columnar body into the mounting hole to set to the assembled position where the thick part is opposed to the circumferential groove; and caulking for compressively pressing the thick part from an axial direction of the columnar body to plastically deform the thick part in a center direction of the mounting hole to bite the thick part into the circumferential groove.