Tool force sensor and method of making same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 3, 1988
Grant Date -
N/A
app pub date -
Apr 14, 1986
filing date -
Apr 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tool force sensor assembly (20) generates an electrical signal which is related to the change in force applied by a tool (24) to a workpiece (28) and is indicative of the wear condition or failure of the tool (24). The sensor assembly (20) is mounted in force transmitting relationship between a movable tool support (30, 36) and a nut member (44, 45) which is driven by screw shaft (40, 41). The sensor assembly (20) comprises a plurality of ring-shaped piezoelectric transducers (48) which are held in preselected, circumferentially spaced relationship to each other around the screw shaft (40, 41) by a retainer ring (56, 58) which is sandwiched between a pair of load distribution plates (52, 54). Fasteners (46) extend through each of the transducers (48) and mount the sensor assembly (20) between the nut member (44, 45) and the tool support (30, 36). An alternate form of the retainer ring (80) is formed by molding the transducers (48 ) within a layer of flexible molding material which allows the transducers (48) to seat properly against the load distribution plates (52, 54). A pair of the sensor assemblies (20) may be respectively mounted on the slide (30) and carriage (36) of a machine tool (22) in order to monitor tool force in two mutually orthogonal directions.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully