3 1176 00148 8247 ' NASA TECHNICAL MEMORANDUM NASA TM "_5_ AN IMPROVED EVALUATION OF SURFACE FINISH WITH A THREE DIMENSIONAL TESTER Grandadam -- Prebet -- Riout NASA-TM-75835 19810013830 Translation of "Le rugiosimetre tridimensionnel pour une meilleure evaluation des etats de surface", Centre d'Etude Technique des Industries Metallurgiques, Senlis, France, Study no. I._D.04.0, Report 6, July 20, 1979, 20 pages LIBP,ARY COPY A/J6 1.3 1980 LANGLEY RESEARCH CENTER LIBRARY,NASA HAMPTON_VlRGINI_' NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON, D.C. 20546 JULY 1980 https://ntrs.nasa.gov/search.jsp?R=19810013830 2020-02-16T05:24:08+00:00Z
25
Embed
LIBP,ARCOPY Y - NASA · Grandadam -- Prebet -- Riout Centre d'Etude Technique des Industries Metallurgiques (CETIM) The common dimensional unit for measuring surface finish is the
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
3 1176 00148 8247
' NASA TECHNICAL MEMORANDUM NASA TM "_5_
AN IMPROVED EVALUATION OF SURFACE FINISHWITH A THREE DIMENSIONAL TESTER
Grandadam -- Prebet -- Riout
NASA-TM-75835 19810013830
Translation of "Le rugiosimetre tridimensionnel pour une meilleureevaluation des etats de surface", Centre d'Etude Technique desIndustries Metallurgiques, Senlis, France, Study no. I._D.04.0,Report 6, July 20, 1979, 20 pages
LIBP,ARYCOPYA/J6 1.31980
LANGLEY RESEARCH CENTERLIBRARY,NASA
HAMPTON_VlRGINI_'
NATIONAL AERONAUTICS AND SPACE ADMINISTRATIONWASHINGTON, D.C. 20546 JULY 1980
t (CETIM) \. . .. _iY',.----.-.. -.- ..--------.-------.--------.-------------.------------.---------------..--.--.--~ I J. Con t,oct '" G,an! No., C f..; ~l'formirJr: O'~H~"H ;nhon Nomft or1d Addr~$8 ! NASw - 3199
1----------._--------------------.-------1i 13. I yp .. of Report and Pe,iod Cove,ed---i Translation
_E.oring Agency Code
I l.1-i 4. Tlti~ 'md Swbt:!la
Ii AN IMPROVED
!FINISH WITHTESTER1-
Translation of "Le rugiosimetre tridimensionnel pour unemeilleure evaluation des etats de surface", Centre d'EtudeTechnique des Industries Metallurgiques, Senlis, France,I Study no. 1·aD.04.0. Report 6. July 20. 1979. 20 pages
~e' design and programming of an automated surface finishtester is described. This device produces a threedimensional image of the microscopic texture of thesurface being examined. It is a vast improvement overolder types of instruments that can only plot one surfacecross section at a time.
I
17. Key Wo,d. (Selected by AuthOr(51) 18. Distribution Stot"monl
Unclassified-Unlimited
An Improved Evaluation of Surface Finish
with a Three Dimensional Tester
Grandadam -- Prebet -- Riout
Centre d'Etude Technique des Industries Metallurgiques
(CETIM)
The common dimensional unit for measuring surface finish is the /I*
micron. We are therfore studying a subject of very small size.
However, its influence can be found in almost all fields of
mechanical engineering° Because dealing with such small dimensions
is outside of ordinary human experience, descriptions of surface
finish are full of words that evoke the convoluted terrain of the
14ode d usino_ge :"Fre_isage" Cu't,-of'f [en _1,'=]?
2.5Echel le vertical
Reference du _QI e 9ro.phi_ue Pertr..eur I llel'_ [en e_icron/¢"BFRH 750/Ir.j" fq]:H?
E5
Incree',entX [en_.lic.ren]:P?30Ir_cre_'_ent I' [ene_icron]:Q?120Code den, 1 ,.:,;e_,_ent
" toble/X[l ou 2]:ReICode depl_toer_enttable/Y[4 ou 8]"S?4
Hombre point_ech_nt iIionr,_,e :N?450lib de ligne.:.:Z?70Ir,crer_ent sur9rctpl_i_ue[en r._,q]:E?3Rf_,pli4 ico.tic,n selot, X sur _t',:,.phi.'lue : 11725
J
Figure 9a
Calculator Imput
15
IMPUT:o
. Transducer code(I or 10):T?I0
Test Length(in mm) :C?15
Date: Evaluation length"06/20/79" (in mm):
12Test speed
Type of part: (in mm/s) :D?"Stainless Steel .5Sample"
Cutoff (in mm)?2.5
How machined: Vertical diagram"Milled" scale (in microns/
cm) :H?25
Transducer
model no.: X increment"BFRW 750/10" (in microns) :P?
30Y increment
(in microns) :Q?120
Table displacemntcode/X (I or 2):R?1
Table displacementcode/Y (4 or 8):S?4
Number of pointschecked:N?450No. of lines:Z?70
Diagram increment(in mm):E?5
X axis diagramamplification:M?25
Figure 9b
Translation of Figure 9a
16
YBLEUP.CF..'TTERE'._,
F'P,RLIGIIEEen _.Jic /15iton] "
- I Only the data for the first tenRt= '23.40R_,= 3.50 lines are presented here.R_= 5.80
2Rt= 23,@gRe.-" 3.60R_= 5,7()
3Rt.= 23.0¢_IRa= 3.60Rp: " 5.68
4R_= 2::3.28R,I= _,*'.60RF.,= 5.70
5Pt.= 2_,.,. @@R,._= 3.6@Rp= 5.8@
6Rt-- 2_-"•:",ARo.= .,">".6AR_= " 5.78
7F..'_= 22.7r_,Ra= 3.78Rp= 5.70
8"" 58Rt.= ,-..-.
F.'._'_= ?..60R_= 5.80
9"'_@',ZIRt.= ,-..,
Re= 3.5nRF-,= 5.90
18F.:t= 23..'-'_1",_:a= "Rp= 5.,:.@
Figure I0
Calculator Output
Parameter Values
per Line
(in microns)
17
|
/16
a VRLEUP. CF,'ITEF.:_SGI OE:F,IJ,,.
b Rt [r,;oy_..;-,] = _",,:,:,.04 It is evident from the smallR_,[r.',o.xi ] - 24.60Rt[,.,ini]=21.80 average deviationsthat the surface
£co.rt.-t.yr.._.Rt= under examinationis very homoge-0,67neous,
b F:_[,,,oyen]:3.65F:o." .:.,_._:':":"]= 3 80
Ro[r.',i,',i]=.S.50 The amplificationof surfacec Ec.o.rt-%yr..eR,.1.-0,07 featuresis the same along the
b Rr..[r.,c,'x_r,]=5.'" X and the Y axes (The X axis
Rr-.[r._o.xi]=6.20 is the directionin which theRp[r.,ini]: 5.00C £cot'_.-_'x_.Rr..= transduceris moved. Y is
0.,30perpendicularto this direction.)
d ECHELLE ISF..:FIPHI.r.,U The amplificationalong the ZE [e,',;',icror,/cr_] axis (perpendicularto the sur-
e s_lon X 400 face) is forty times greater.
f selot-,y 400 Therefore,the distortionfactorC = 40.
g se!,_nZ lO anamorphosis
h 8MF'LIF!CATION fir8F'H I QUE
e _.lor, × 25 Key: a) Value of overall parameters
f _elon Y Z5 b) (average)
g _elor, Z 1000 c) Average deviation
d) Scale of graph (microns/cm)Figure 11 e) Along the X axis