Apparatus and method to measure the dimensional and form deviation of crankpins at the place of grinding
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United States of America Patent
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May 23, 2006
Grant Date -
Mar 27, 2003
app pub date -
Jan 19, 2001
filing date -
Mar 6, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus and a relevant method for checking a crankpin (18) of a crankshaft (34) positioned on a numerical control grinding machine where it is worked includes a gauging head (39) with a Vee-shaped reference device (20) and a feeler (17), axially movable along a translation direction, that touches the crankpin surface, and an articulated support device (5,9,12) connected to the grinding-wheel slide (1), carrying the guaging head and allowing the reference device (20) to keep contact with the crankpin during its orbital motion around the main rotation axis (0) of the crankshaft. Rough values corresponding to a transducer (41) signals provided at predetermined angular positions of the crankshaft are stored and are processed also to compensate alterations caused both by contact between the sides of the Vee-shaped reference device and the surface of the crankpin to be checked, and by variations of the angular arrangement of the Vee-shaped reference device in the course of orbital rotations of the pin.
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