determination of volumetric machine tool errors by using a ... · introduction : volumetric...
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French National Metrology Institute LNE-Cnam
Automated Production Research Laboratory of ENS Cachan – Univ Paris Saclay
Determination of volumetric machine tool errors by using a hole-bar
material standard (Multi-Feature Bar – MFB)
PhD Student Fabien VIPREY LNE – LURPA
Dr. Ing. Hichem NOUIRA LNE
Dr. Ass Prof Sylvain LAVERNHE LURPA
Prof. Christophe TOURNIER LURPA
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Introduction : Volumetric accuracy
2 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
5-axis machine tool (Mikron UCP710 at LURPA)
Kinematic Architecture
Rotary Table
Swiveling axis
2 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
5-axis machine tool (Mikron UCP710 at LURPA)
Kinematic Architecture
Rotary Table
Swiveling axis
Gap between theoretical
kinematic and real kinematic
2 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Causes of this effect:
Introduction : Volumetric accuracy
5-axis machine tool (Mikron UCP710 at LURPA)
Kinematic Architecture
Rotary Table
Swiveling axis
Gap between theoretical
kinematic and real kinematic
Geometric errors ~ 70% - 90%
Thermo-mechanical phenomena
Environmental hazards
Dynamic forces
Heats
CNC
Vibrations
…
[Mekid2012]
[Schwenke2008]
2 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
3 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
Maximum range of relative deviations between actual and ideal position and maximum
range of orientation deviations in the volume concerned, where the deviations are relative
deviations between the tool side and the workpiece side of the machine tool [ISO230-
1,2012]:
3 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
Maximum range of relative deviations between actual and ideal position and maximum
range of orientation deviations in the volume concerned, where the deviations are relative
deviations between the tool side and the workpiece side of the machine tool [ISO230-
1,2012]:
3 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Introduction : Volumetric accuracy
Maximum range of relative deviations between actual and ideal position and maximum
range of orientation deviations in the volume concerned, where the deviations are relative
deviations between the tool side and the workpiece side of the machine tool [ISO230-
1,2012]:
The aim of this study is to develop a novel material standard to identify motion errors:
- Usable on CMM, 3 or 5 machine tool, by on-line measurement, to insure
traceable and accurate results
- With large field of its application: Metrology room or Manufacturing shop
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Introduction : Literature review
4
Hole plate
[Trapet1991]
Conventional method [ISO 230], [ISO 10360], [ISO
10791], [ISO 13041], [ISO 3070]
2 4
3
Ball plate
[Bringmann2009]
Ball Bar
[Zhang1991] 1
Hole Bar
[Lim2005]
Laser Interferometry (On-line measurement)
[Schwenke2005], [Chen1999]
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Introduction : Literature review
4
Hole plate
[Trapet1991]
Conventional method [ISO 230], [ISO 10360], [ISO
10791], [ISO 13041], [ISO 3070]
2 4
3
Ball plate
[Bringmann2009]
Ball Bar
[Zhang1991] 1
Hole Bar
[Lim2005]
Laser Interferometry (On-line measurement)
[Schwenke2005], [Chen1999]
Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Hole-Bar
Actual Hole-Bar in litterature:
Identification of an additional parameter:
Fabien VIPREY 5 JRP-TIM: Final Workshop at PTB, May 18th, 2016
Development of a novel Hole-Bar with patterns
maximization of the number of geometric errors to identify for each
position of the Hole-Bar
One linear positioning error Exx
One linear positioning error Exx and
one horizontal straightness Eyx
One linear positioning error Exx and
two straightnesses Eyx and Ezx
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Outline
• Development of the Novel Hole-Bar
• Principle
• Technical attributes
• Calibration
• Reversal technique
• Intercomparison
• Application on Machine tool
• Measurement process
• Geometric model
• Results
• Conclusion
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
[ISO 5459:2011]
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
[ISO 5459:2011]
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
[ISO 5459:2011]
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
[ISO 5459:2011]
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
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The design of the Hole-Bar consists in a repetition of a 3D pattern in one
direction ()
Principle of the new Hole-Bar
JRP-TIM: Final Workshop at PTB, May 18th, 2016 7 Fabien VIPREY
The identified points Oi = (xi ,yi ,zi) offers 3 intrinsic geometric
parameters: 1 linear positioning and 2 straightnesses
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
Mistake-proofing
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
First mode of vibration
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
Setting-up on points of
minimum deformation
First mode of vibration
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Technical attributes of Hole-Bar (Invar)
8 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016
Setting-up on points of
minimum deformation Hole-Bar
Work holder
First mode of vibration
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Technical attributes of Hole-Bar (Invar)
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Technical attributes of Hole-Bar (Invar)
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Coordinates of points of interest
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Coordinates of points of interest
Nominal coordinates (3D-CAD model)
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Coordinates of points of interest
Nominal coordinates (3D-CAD model)
Real coordinates (real geometry)
Fabien VIPREY 9 JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Coordinates of points of interest
Nominal coordinates (3D-CAD model)
Real coordinates (real geometry)
Fabien VIPREY 9 JRP-TIM: Final Workshop at PTB, May 18th, 2016
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Coordinates of points of interest
Nominal coordinates (3D-CAD model)
Real coordinates (real geometry)
Fabien VIPREY 9 JRP-TIM: Final Workshop at PTB, May 18th, 2016
Calibration of the Hole-Bar on accurate
CMM insures traceable
measurements on machine tool
The reversal technique and
substitution technique are applied to
assess the calibration.
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Coordinates of points of interest
Nominal coordinates (3D-CAD model)
Real coordinates (real geometry)
Fabien VIPREY 9 JRP-TIM: Final Workshop at PTB, May 18th, 2016
Calibration of the Hole-Bar on accurate
CMM insures traceable
measurements on machine tool
The reversal technique and
substitution technique are applied to
assess the calibration.
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Calibration: Reversal technique
Fabien VIPREY 10 JRP-TIM: Final Workshop at PTB, May 18th, 2016
MFB calibration set-up on
CMM at LNE
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Calibration: Reversal technique
Fabien VIPREY 10 JRP-TIM: Final Workshop at PTB, May 18th, 2016
MFB calibration set-up on
CMM at LNE
Linear positioning error along XHB
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Calibration: Reversal technique
Fabien VIPREY 10 JRP-TIM: Final Workshop at PTB, May 18th, 2016
MFB calibration set-up on
CMM at LNE
Linear positioning error along XHB
Measurement
Linear positioning error
along ZCMM
Random error
Nominal
geometry
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Calibration: Reversal technique
Fabien VIPREY 10 JRP-TIM: Final Workshop at PTB, May 18th, 2016
MFB calibration set-up on
CMM at LNE
Linear positioning error along XHB
Straightness error along YHB and ZHB
Measurement
Linear positioning error
along ZCMM
Random error
Nominal
geometry
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Calibration: Reversal technique
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European Participants for intercomparison
Fabien VIPREY 12 JRP-TIM: Final Workshop at PTB, May 18th, 2016
NMI Type of CMM Size of CMM
(mm3)
U of CMM
(µm+L(m)xµm)
T in metrology
room (°C)
Along
the
CMM-
axis
Operator Signatory of
CIPM MRA
LNE Renault Automotion 251310 2500 x 1300 x 1000 4,5 + L x 4,0 20,26 0,03 Z-axis Fabien Viprey Yes
CMI SIP CMM5 710 x 710 x 550 0.8 + L x 1.3 19,73 0,09 X-axis Pavel Skalník Yes
UM Carl Zeiss UMC 850 1200 x 850 x 600 2,1 + L x 3,3 20,39 0,03 Y-axis Mitja Mlakar Designated by MIRS
PTB UPMC 850 CARAT 850 x 1200 x 600 0.8 + L x 3.5 20,18 0,04 X-axis Norbert Gerwien Yes
LNE Renault Automotion 251310 2500 x 1300 x 1000 4,5 + L x 4,0 20,04 0,03 Z-axis Fabien Viprey Yes
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Results: Linear positioning error along XHB
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Results: Straightness error along YHB
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Results: Straightness error along ZHB
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Results: Straightness error along ZHB
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Real time plateform for Identification of geometric errors
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Real time
probing
Developed end user interface
F=33,33 kHz
T=30 µs
Resolution = 10 nm
U(k=2) RMP600 = 0,25 µm
Udelay max at 240mm/min = 0,47µm
Probing
trajectory
Mikron UCP710
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Geometric model of 3-axis chain of the investigated machine tools
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Differential
analysis
Geometric errors effects on the joint
parameters
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Identification procedure of motion errors of X-axis
Application on Mikron UCP710 5-axis machine tool:
EXX , EYX , EZX , EAX , EBX and ECX along the X-axis identified on the points of interest Oi of the
Hole-Bar:
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Results of identification in the shop floor
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EXX in july EXX in december
EYX, and EZX in july EYX, and EZX in december
EAX, EBX, and ECX in july EAX, EBX, and ECX in december
T=201°C T=271°C
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Results of identification in the shop floor
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EXX in july EXX in december
EYX, and EZX in july EYX, and EZX in december
EAX, EBX, and ECX in july EAX, EBX, and ECX in december
Identified geometric errors
depend on the environmental
conditions
T=201°C T=271°C
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Results of identification in the shop floor
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EXX in july EXX in december
EYX, and EZX in july EYX, and EZX in december
EAX, EBX, and ECX in july EAX, EBX, and ECX in december
Identified geometric errors
depend on the environmental
conditions
T=201°C T=271°C
Solutions:
use of climate chamber
compensation of boundary
conditions: several geometric
models which depend on
boundary conditions
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Calibration using a Laser Tracer
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x4
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Calibration using a Laser Tracer
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A variation between the results can be observed definition of end-point reference straight
line (end-points), effects of the angular errors and boundary conditions
x4
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Conclusion
• Novel Hole-Bar made of thermo-invariant material (Invar) was defined and developed to
calibrate machine tool
• The design of the Hole-Bar involves several patterns, including cylindrical and plane
geometric entities, useful to extract 12 points of interests providing 3 geometric errors
(linear positioning error and 2 straightnesses) for each selected position
• The developed Hole-Bar was carefully calibrated on an accurate CMM, traceable to the
SI meter definition at LNE
• The reversal technique was applied to calibrate the Hole-Bar in order to separate the
motion errors of the CMM and the true intrinsic parameters of the Hole-Bar
• An intercomparison was shuttled between 4 european NMIs (PTB, CMI, UM, LNE)
• The Hole-Bar was used for the calibration of the Mikron UCP710 machine tool to
evaluate the efficiency
21 Fabien VIPREY JRP-TIM: Final Workshop at PTB, May 18th, 2016 Fabien VIPREY
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• Submission of a journal paper about the intercomparison
• Identification of the motion errors of the rotary axes using the Hole-Bar
• Application of a compensation
Dissemination
• 2nd MacroScale International Conference, Wien (Austria), October 2014
• Article submitted for publication in the journal: Precision Engineering
Novel multi-feature bar design for machine tools geometric errors identification
Further works
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French National Metrology Institute LNE-Cnam
Automated Production Research Laboratory of ENS Cachan – Univ Paris Saclay
Thank you for your attention!
The authors sincerely thank the EMRP organization. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union (IND62:
JRP-TIM)
Fabien VIPREY – LNE – LURPA [email protected]
Christophe TOURNIER – LURPA
Sylvain LAVERNHE – LURPA
Hichem NOUIRA – LNE