Method for manufacturing disk member
a technology of disk members and manufacturing methods, applied in the direction of machines/engines, positive displacement liquid engines, transportation and packaging, etc., to prevent the occurrence of a boss hiatus
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second embodiment
[0070] In the second embodiment, subsequent to the completion of the burring step, the upper die 5, the lower die 6 and the punch 4 which are similar to those shown in FIG. 2 are used to compress the burring area Wb in the axial direction to form the boss 1B. The lower surface 1a of the boss 1B which represents the bottom end is formed so as to project below the body 1A, thus on the opposite side from the direction in which the burring area Wb is caused to rise to its feet (FIG. 7 (a)). On the other hand, the upper surface 1e of the boss 1B is recessed below the upper surface 1d of the body 1A. The swaging step also shapes the through-opening 1F. In this embodiment, the upper boundary region 1D is shaped so as to be gently tapered, and the lower boundary region 1C is also shaped to be tapered.
first embodiment
[0071] Subsequently, the finishing steps takes place in the similar manner as in the first embodiment to shape the junction between the boundary region 1C and a lower surface 1b into an arcuate configuration (FIG. 7 (b)).
[0072] Finally, a chamferring, a surface roughening, and a coating are applied at required locations in the similar manner as in the first embodiment to complete the steps of manufacturing the disk member 1 as a final product (FIG. 8).
[0073] The second embodiment described above is capable of achieving a similar functioning and effects as in the first embodiment.
[0074]FIG. 9 shows a third embodiment of the present invention. In the third embodiment, by changing the cross-sectional configurations of the pressing surfaces of the upper die 5 and the lower die 6 shown in FIG. 9 (a) which illustrates the swaging step, the boss 1B and associated parts have different cross-sectional configurations from those in the first embodiment shown in FIG. 1 (c). The piercing step ...
third embodiment
[0075] In the third embodiment, subsequent to the completion of the burring step, using an upper die, not shown, having a pressing surface (lower surface) which is an entirely flat surface, a lower die 6 and a punch 4 which are similar to those shown in FIG. 2, the burring area Wb is compressed axially to form the boss 1B (FIG. 9 (a)). The boss 1B has an upper surface 1e which is coplanar with an upper surface 1d of the body 1A and a lower surface 1a which projects downwardly of the lower surface 1b of the body 1A on the opposite side from the direction in which the burring area Wb is caused to rise to its feet. Accordingly, a through-opening 1F is shaped during the swaging step, and a lower boundary region 1C is shaped to be tapered.
[0076] Subsequently, a finishing step takes place in the similar manner as in the first embodiment, shaping a junction between the boundary region 1C and a lower surface 1b into an arcuate configuration (FIG. 9 (b)). At the same time, a boundary region ...
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Abstract
Description
Claims
Application Information
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