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This tool design is a concept adapted to fit all situations of chip gang placement where a linear shrink factor is applicable. One need only build the family of tools based on chip array and size.
English (United States)
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Chip Orientor With Shrink Compensation for Gang Placement
This tool design is a concept adapted to fit all situations of chip gang
placement where a linear shrink factor is applicable. One need only build the
family of tools based on chip array and size.
Shown in Fig. 1 is an outline overlay of the major contributive design
principles to accomplish this. A 5 x 5 array is used since it is the largest array
and, therefore, a good example. The arrows indicate a direction of travel for
each chip holder 1. The holders are keyed so that they can only move in one
direction. A drive pin 2 in the center of each holder is driven outward by a rotary
cam plate 3 (Fig. 2B) that has a series of radial skewed slots into which the pins
fit. The center chip holder R0 is fixed, and its center is used to reference all other
positions R1-R5 (Fig. 2A). The cam plate rotates about the center chip holder's
axis, and contains a fixed pattern of slots whose geometry is calculated to give
proper motion and force. The pin is close fit to the slot, giving the cam plate full
control in both directions. There is need for three-type keying arrangements, as
indicated, and the center key is pinned in location (fixed). A section of Fig. 2 and
Fig. 3 show types of chip holder designs that suit the purpose. Accurate
machining of bearing surfaces is required to minimize "Z" motion.
The drive pin design shown here gives options on how to
accomplish center reference of the holder by the use of locatin...