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US 7,546,669 B1Granted
Progressive and transfer die stamping
AssigneeCheung Woh Technologies Ltd.
InventorLaw Kung Ying
Life of this patent
Estimating the term…
Abstract
Numerous embodiments of a method to form a base plate for a hard disk drive are described. In one embodiment, a blank base plate is advanced through plurality of die stations and parts of the base plate are press worked to form a disk drive base plate. In one embodiment, the blank base plate may be press worked by stamping the base plate with a progressive die assembly. In an alternative embodiment, the blank base plate may be press worked by stamping the base plate with a transfer die assembly.
Claims7
A method, comprising:
- advancing a base plate through a plurality of die stations of a progressive die assembly, wherein the base plate includes a scrap skeleton portion;
- press working a voice coil motor relief surface, a motor sitting relief, and a flex circuit opening relief in the base plate;
- press working a disk relief surface and an actuator relief surface and forming a rest area near the disk relief surface in the base plate;
- cold forging one or more bosses in the base plate;
- forming additional bosses and one or more piercing bend reliefs in the base plate;
- forming a motor hub, flex circuit openings, piercing holes and a bend relief in the base plate;
- trimming the base plate;
- press working the base plate to form side frames;
- trimming the scrap skeleton portion from the base plate;
- machining the base plate to refine datums.
7 more elements
A method, comprising:
- advancing a blank base plate having a scrap skeleton portion through a progressive die assembly having a plurality of die stations with the scrap skeleton portion;
- forming a disk drive base plate from the blank base plate wherein forming the disk drive plate comprises:
- press working a voice coil motor relief surface, a motor sitting relief, and a flex circuit opening relief in the base plate at one of the plurality of die stations;
- press working a disk relief surface and an actuator relief surface and forming a rest area near the disk relief surface in the base plate;
- cold forging one or more bosses in the base plate;
- forming additional bosses and one or more piercing bend reliefs in the base plate;
- forming a motor hub, flex circuit openings, piercing holes and a bend relief in the base plate;
- trimming the base plate;
- press working the base plate to form side frames;
- and
- separating the disk drive base plate from the scrap skeleton portion with the progressive die assembly.
8 more elements
Dependencies are inferred from the claim text.