Thin plate burring processing method and thin plate female screw-forming method
AssigneeRicoh Company, Ltd.
InventorsTaiki Maeda, Hirokazu Kurihara
Life of this patent
Estimating the term…
Abstract
A thin plate burring processing method includes a first step of forming a thin portion thinner than an original thickness in a target portion by performing crushing processing on the target portion of a plate-like workpiece, a second step of forming a circular through-hole in the thin portion by punching processing, and a third step of forming an annular portion rising from a surface of the workpiece by performing projection processing with burring processing around the through-hole formed in the thin portion.
Claims5
A thin plate burring processing method, comprising:
- a first step of forming a thin portion thinner than an original thickness in a target portion by performing crushing processing on the target portion of a plate-like workpiece;
- a second step of forming a circular through-hole in the thin portion by punching processing;
- and
- a third step of forming an annular portion rising from a surface of the workpiece by performing projection processing with burring processing around the through-hole formed in the thin portion.
A thin plate female screw-forming method, comprising:
- a first step of forming a thin portion thinner than an original thickness in a target portion by performing crushing processing on the target position of a plate-like workpiece;
- a second step of forming a circular through-hole in the thin portion by punching processing;
- a third step of forming an annular portion rising from a surface of the workpiece by performing projection processing with burring processing around the through-hole formed in the thin portion;
- and
- a fourth step of forming a female screw in an inside wall surface of the annular portion.
Dependencies are inferred from the claim text.