Positional reference system for ultraprecision machining

Patent · Fri Jan 01 00:00:00 EST 1982

OSTI ID:864448

Arnold, Jones B ^[1]; Burleson, Robert R ^[2]; Pardue, Robert M ^[1]

---

1. Knoxville, TN
2. Clinton, TN

A stable positional reference system for use in improving the cutting tool-to-part contour position in numerical controlled-multiaxis metal turning machines is provided. The reference system employs a plurality of interferometers referenced to orthogonally disposed metering bars which are substantially isolated from machine strain induced position errors for monitoring the part and tool positions relative to the metering bars. A microprocessor-based control system is employed in conjunction with the plurality of position interferometers and part contour description data inputs to calculate error components for each axis of movement and output them to corresponding axis drives with appropriate scaling and error compensation. Real-time position control, operating in combination with the reference system, makes possible the positioning of the cutting points of a tool along a part locus with a substantially greater degree of accuracy than has been attained previously in the art by referencing and then monitoring only the tool motion relative to a reference position located on the machine base.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4365301
• OSTI ID: 864448
• Country of Publication: United States
• Language: English

Related Subjects

positional
reference
ultraprecision
machining
stable
improving
cutting
tool-to-part
contour
position
numerical
controlled-multiaxis
metal
machines
provided
employs
plurality
interferometers
referenced
orthogonally
disposed
metering
bars
substantially
isolated
machine
strain
induced
errors
monitoring
tool
positions
relative
microprocessor-based
control
employed
conjunction
data
inputs
calculate
error
components
axis
movement
output
corresponding
drives
appropriate
scaling
compensation
real-time
operating
combination
makes
positioning
locus
degree
accuracy
attained
previously
referencing
motion
located
base
precision machining
cutting tool
reference position
position control
positional reference
stable position
numerical control
error components
data input
numerical controlled
/700/82/318/356/451/