We Claim:
[Claim 1] A press device for manufacturing a product by
punching a material, wherein
in punching of a thin-width portion of the product
to be formed in a smaller width than a sheet thickness of the5
material, punching is performed while movement of the thin-
width portion in a plane direction is restricted.
[Claim 2] The press device according to claim 1, comprising:
a punch;10
a backup;
a stripper; and
a die, wherein
the punch and the backup are placed so as to be
opposed to each other on upper and lower sides with the15
material interposed therebetween,
the stripper and the die are placed so as to be
opposed to each other on upper and lower sides with the
material interposed therebetween, and
the punch, the backup, the stripper, and the die20
are placed at such positions that movement of the thin-width
portion in the plane direction is restricted.
[Claim 3] The press device according to claim 2, wherein
the stripper and the die are placed so as to bring25
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a part punched by the punch back into the material.
[Claim 4] The press device according to claim 2 or 3, wherein
in a case where a surface to be formed by cutting
one side in a width direction of the thin-width portion is5
defined as a first surface, a surface to be formed by cutting
another side in the width direction is defined as a second
surface, and the first surface and the second surface are
punched in different stages,
the punch has a protrusion to contact with the10
first surface or the second surface punched previously.
[Claim 5] The press device according to claim 2 or 3, wherein
in a case where a surface to be formed by cutting
one side in a width direction of the thin-width portion is15
defined as a first surface, a surface to be formed by cutting
another side in the width direction is defined as a second
surface, and the first surface and the second surface are
punched in different stages,
the backup has a protrusion to contact with the20
firs