Abrading – Machine – Rotary tool
Reexamination Certificate
1999-12-10
2001-10-02
Rachuba, M. (Department: 3724)
Abrading
Machine
Rotary tool
C451S288000, C451S291000, C451S400000
Reexamination Certificate
active
06296554
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece carrier, and more particularly to a non-circular workpiece carrier for carrying a non-circular workpiece in a processing machine for receiving a processing process, for example, grinding, polishing, etc.
In a processing machine
9
for processing wafer, ceramic substrate, silicon substrate, back light board, glass board, etc., a center gear
92
and an external gear
91
are concentrically mounted on the machine base
90
, a plurality of workpiece carriers
93
are meshed between the center gear
92
and the external gear
91
and work as planet gears. When the top abrasive wheel
94
and a bottom abrasive wheel
95
are closed on top and bottom sides of the workpiece carriers
93
, the processing machine
9
is started, thereby causing the top and bottom walls of the workpiece to be ground and polished. The workpiece carrier
93
, as shown in
FIG. 2
, comprises a plurality of non-circular holes
931
for receiving a respective non-circular workpiece
31
′ for processing. The holes
931
fit the non-circular shape of the workpiece
31
′ to be processed. Because the non-circular workpiece
31
′ cannot be rotated relative to the workpiece carrier
93
when the workpiece carrier
93
is rotated and turned about the center gear
92
, different locations at the surface of the non-circular workpiece receive different cutting speed, thereby preventing the surface of the workpiece from being evenly processed. Further, the workpiece carriers
93
can be used for carrying a particular shape of workpiece only. For processing workpieces of different shapes, different workpiece carriers shall be used.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a non-circular workpiece carrier, which enables the surface of the loaded workpiece to be processed more evenly. It is another object of the present invention to provide a non-circular workpiece carrier, which uses replaceable carriages with a common carrier body, so that different carriages can be used to carry different workpiece. According to the present invention, the non-circular workpiece carrier comprises a wheel-like carrier body, and at least one carriage. The wheel-like carrier body comprises a transmission unit disposed around the periphery thereof, and at least one carrier unit. The transmission unit receives a transmission power for causing the wheel-like carrier body to rotate around the machine base. The at least one carriage is respectively disposed in the at least one carrier unit to hold non-circular workpiece, and forced to gyrate relative to the wheel-like carrier body, enabling loaded non-circular workpiece to be surface-processed (ground, polished, etc.) evenly. Each carriage has at least one positioning unit for the position of a respective non-circular workpiece. Different carriages are alternatively used with the carrier body subject to the shapes of workpiece to be processed. In one embodiment of the present invention, the carrier unit is a circular through hole, and the carriage is comprised of a disk-like base fitting the circular through hole. In another embodiment of the present invention, the carrier unit is a circular recess, and the carriage is a bracket fitting the circular recess. The positioning unit can be a non-circular through hole or recess fitting the shape of the workpiece. For example, the positioning unit can have a square shape, triangular shape, hexagonal shape, rhombic shape, or any of a variety of irregular shapes such as heart shape, S-shape, etc. The transmission unit of the carrier body can be driven by chain means, rack means, belt, friction wheel, electric power, magnetic force, etc.
REFERENCES:
patent: 4916868 (1990-04-01), Wittstock
patent: 4996798 (1991-03-01), Moore
patent: 5085009 (1992-02-01), Kinumura et al.
patent: 5140774 (1992-08-01), Onodera
patent: 6080042 (2000-06-01), McGregor et al.
patent: 6135854 (2000-10-01), Masumura et al.
patent: 47-27315 (1972-07-01), None
patent: 401092063 (1989-04-01), None
Hung Chang-Ku
Lai Kuo-Chih
Industrial Technology Research Institute
Rabin & Berdo P.C.
Rachuba M.
LandOfFree
Non-circular workpiece carrier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-circular workpiece carrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-circular workpiece carrier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2612439