To shorten a facility for manufacturing cages in a feed direction of a strip and a shaped material fabricated from the same and reduce the installation space.
There is employed a method of manufacturing punched cages including: forming the shaped material 20 of a longitudinal shape by using the strip 10 as a raw material and by forming a pair of annulus forming parts 11, 11 and a plurality of bar parts 13 which connect the pair of annulus forming parts 11, 11 to form pockets 12 for receiving rolling elements; and forming the shaped material 20 in an annular shape by joining the opposite ends 21, 21 in the longitudinal direction of the same. In the method, the longitudinal direction of the shaped material 20 is oriented in a direction perpendicular to the feed direction of the strip 10 in a state before the opposite ends 21, 21 of the shaped material 20 are joined, and the shaped materials 20 are shaped sequentially while the strip 10 is fed sequentially in the feed direction.
| WO/1995/022420 | DEVICE FOR EXPANDING ROTATIONALLY SYMMETRICAL MOULDINGS |
| WO/2013/137086 | METHOD FOR PRODUCING HOLDER AND HOLDER |
Takayoshi Tagawa
Higashio Masahiro
Yaichiro Nakatani
Takashi Shimizu
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