Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1980-10-24
1983-05-03
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
269 57, 269224, 269226, 269902, 269909, B23Q 308
Patent
active
043818587
ABSTRACT:
This invention relates to a fluid operated, positioning apparatus for a workholder (43, 144, 146, 148, 150) for maintaining the locating surfaces (22 and 24) of a workpiece, such as a crosshead (2), in contact with fixed abutments (62 and 68) of a workholder (43, 144, 146, 148, 150) designed to receive workpieces (2) subject to substantial manufacturing tolerances in which forces are imparted to each workpiece (2) during machining operations which tend to move the locating surfaces (22 and 24) of the workpiece (2) away from the fixed abutments (62 and 64) of the workholder. The positioning apparatus (44) includes an L-shaped member (46) in which are mounted a movable pin (70) operating in an advanced position to clamp a crosshead against fixed abutments (62 and 64) of the workholder (43, 144, 146, 148, 150) and a retracted position in which the crossheads (2) may be inserted and removed from the workholder (43, 144, 146, 148, 150). Movable pin (70) is operable by means of a second piston (96) and threaded pin (100) which is accessible from an end surface of one leg portion (50) of the L-shaped member (46). Opposite parallel longitudinal movement of the movable pin (70) and second piston (96) is effected by means of a hydraulic link means (107).
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patent: 4017703 (1977-04-01), Lavins et al.
Cummins Engine Company, Inc.
Watson Robert C.
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