INTERNATIONAL STANDARD ISO 3070-2 Fourth edition 2016-08-01 Machine tools — Test conditions for testing the accuracy of boring and milling machines with horizontal spindle — Part 2: Machines with movable column along the X-axis (floor type) Machines-outils — Conditions d’essai pour le contrôle de l’exactitude des machines aléser et fraiser broche horizontale — Partie 2: Machines montant mobile le long de l’axe X (de type au sol) Reference number ISO 3070-2:2016(E) © ISO 2016 ISO 070 -2 : 01 6(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2016, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2016 – All rights reserved ISO 070-2 :2 016(E) Contents Page Foreword iv Introduction v Scope Normative references Terminology and designation of axes Special remarks concerning particular elements 5.1 Spindle heads 5.2 Tables Preliminary remarks 6.1 Measurement units 6.2 Reference to ISO 230 series of standards 6.3 Testing sequence 6.4 Tests to be performed 6.5 Measuring instruments 6.6 Software compensation 6.7 Minimum tolerance Geometric tests 7.1 Straightness and angular deviations of linear axes 7.2 Squareness and parallelism between linear axes 13 7.3 Fixed table independent of the machine 18 7.4 Boring spindle 22 7.5 Milling spindle 26 28 35 Checking accuracy and repeatability of positioning by numerical control 37 Annex A (informative) Geometric accuracy of axis of rotation 44 Annex B (normative) Tests of accessory facing heads [see Figure b ) ] 48 Annex C (informative) Nomenclature of machine tool components in other languages 52 Bibliography 53 Terms and definitions 7.6 Ro tary and movab le tab le 7.7 I ndexing o r ro tary tab les © ISO 2016 – All rights reserved iii ISO 070 -2 : 01 6(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso.org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html The committee responsible for this document is ISO/TC 39 Machine tools, Subcommittee SC Test conditions for metal cutting machine tools This fourth edition cancels and replaces the third edition (ISO 3070-2:2007), which has been technically revised ISO 3070 consists of the following parts under the general title Machine tools — Test conditions for testing the accuracy of boring and milling machines with horizontal spindle: — Part 1: Machines with fixed column and table movable on a cross slide — Part 2: Machines with movable column along the X-axis (floor type) — Part 3: Machines with movable column along the Z-axis (T-bed type) iv © ISO 2016 – All rights reserved ISO 070-2 : 01 6(E) Introduction Most horizontal spindle boring and milling machines fall into the following three categories cha rac teri ze d b y thei r p ar tic u la r figu ration: a) mach i ne s with fi xe d colu m n a nd table movab le on a c ro s s s l ide; b) mach i ne s with movab le colu m n a long the X- a xi s (flo or typ e) ; c) mach i ne s with movab le colu m n a long the Z- a xi s ( T-b e d typ e) T he obj e c t o f I S O 70 i s to s upply i n formation a s wide and comprehen s ive as p o s s ible on te s ts wh ich c an b e c arrie d out for comp ari s on, accep tance , mai ntenance or a ny o ther pur p o s e This revision of this part of ISO 3070 provides additional information on tests to be performed and s p e ci fie s new tolerance s to b e tter refle c t the c u rrent te ch nolo g y Machining tests have been excluded from this revision of this part of ISO 3070 considering that such te s ts c an typic a l ly b e the obj e c t o f agre ement b e twe en ma nu fac turer/s uppl ier a nd u s er, ( p o s s ibly) i nclud i ng te s ts th at are s p e ci fie d i n I S O 10 791-7 © ISO 2016 – All rights reserved v INTERNATIONAL STANDARD ISO 070-2 :2 016(E) Machine tools — Test conditions for testing the accuracy of boring and milling machines with horizontal spindle — Part 2: Machines with movable column along the X-axis (floor type) Scope T h i s p ar t o f I S O 70 s p e ci fie s , with re ference to I S O -1 , I S O -7 and I S O -2 , ge ome tric te s ts , s pi nd le te s ts a nd te s ts for che cki ng the acc u rac y a nd rep e atabi l ity o f p o s ition i ng b y nu meric a l control of horizontal spindle boring and milling machines having a movable column along the X-axis and also s p e ci fie s the appl ic able tolera nce s corre s p ond i ng to genera l-pu rp o s e, norma l acc u rac y mach i ne s T h i s typ e o f mach i ne s are u s ua l ly provide d with sl id i ng b ori ng s pi nd le s and c an b e provide d with u ni vers a l s pi nd le he ad s o f the — fol lowi ng typ e s , who s e te s t cond ition s are covere d b y I S O 175 43 -1 : fi xe d or i ndexable he ad s , with acce s s or y s pi nd le(s) s qua re to the Z- a xi s , with or without one s pi nd le p ara l lel to the Z-a xi s; — 45° split indexable heads, with mechanical indexing of the different angular positions of the two b o d ie s (e g H i r th coupl i ngs) ; — 45 ° s pl it co nti nuo u s he ad s , p ro vide d w i th co nti nuo u s p o s i tio n i n g of the two nu me r ic a l l y co ntro l le d a xe s ; — s wivel he ad s , with two nu meric a l ly control le d ro ta r y a xe s p erp end ic u lar to e ach o ther Annex B This part of ISO 3070 concerns machines having movement of the column on the bed (X-axis), vertical movement of the spindle head on the column (Y-axis), axial movement of the ram (Z-axis), axial movement of the boring spindle (W-axis), and, in most cases, one or more tables moving on a bed parallel to the spindle (R-axis) and rotating around a vertical axis (B-axis) Te s t cond ition s for acce s s or y fac i ng he ad s a re s p e ci fie d i n T h i s p ar t o f I S O 70 de a l s on ly with the veri fic ation o f the acc u rac y o f the mach i ne I t e s no t apply to the operational testing of the machine (e.g vibration, abnormal noise, stick-slip motion of components) nor to mach i ne ch arac teri s tics (e g s p e e d s , fe e d s) , a s s uch che cks are genera l ly c a rrie d out b e fore te s ti ng the acc u rac y Normative references T he fol lowi ng i nd i s p en s able c u ments , i n whole or i n p ar t, are normatively re ference d i n th i s c u ment a nd are for its appl ic ation For date d re ference s , on ly the e d ition cite d appl ie s For u ndate d re ference s , the late s t e d ition o f the re ference d c u ment (i nclud i ng any amend ments) appl ie s ISO 230-1:2012, Test code for machine tools — Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditions ISO 230-2:2014, Test code for machine tools — Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes ISO 230-7:2015, Test code for machine tools — Part 7: Geometric accuracy of axes of rotation © ISO 2016 – All rights reserved ISO 070-2 :2 016(E) Terms and definitions For the pu rp o s e s o f th i s c ument, the fol lowi ng term s and defi nition s apply 3.1 boring operation machining operation for generating holes of various sizes and geometries in which the principal cutting motion is the rotation of a single-point cutting tool against the non-rotating workpiece and where the c utti ng energ y i s brought b y the c utti ng to ol ro tation N o te to entr y: B or i ng the d i a me ter o f c yl i nd r ic a l , co n ic a l , b l i nd o r th rou gh hole s to the re qu i re d s i z e i s ach ie ve d b y u s i n g a b or i ng b a r to lo c ate the c utti ng e dge o f the b o r i n g to ol i n a wel l- de fi ne d p o s ition with re s p e c t to the axis average line of the boring spindle N o te to entr y: I n the c a s e o f co a xi a l b ore s s itu ate d on o pp o s ite face s o f the s a me wo rkp ie ce , the o p eration m ay be carried out using the sliding boring spindle, if it can work through all the workpiece, or turning the table 180º to bore the opposite side of the workpiece (reverse boring) 3.2 milling operation machining operation to generate surfaces of various geometries in which the principal cutting motion is the rotation of a cutting tool with multiple cutting edges against the non-rotating workpiece and where the c utti ng energ y i s brought b y the c utti ng to ol ro tation N o te to entr y: M i l l i n g o p eration s mo s tl y i nvol ve face m i l l i ng or end m i l l i ng T he to ol s a re mo u nte d either i n the boring spindle taper (see Figure 2) or, as for face milling cutters, on the milling spindle nose 3.3 boring and milling machine machine tool in which boring and milling operations are executed Terminology and designation of axes I n a b ori ng and m i l l i ng mach i ne, c utti ng movement i s generate d b y the ro tation o f the s pi nd le(s) and , p o s s ibly, o f the faci ng he ad The feed movements are as follows: a) tran s vers e movements o f the colu m n on the b e d ( X-a xi s) ; b) ver tic a l movement o f the s pi nd le he ad ( Y- a xi s) ; c) a xia l movement o f the ram ( Z-a xi s) ; d) a xia l movement o f the s pi nd le ( W-a xi s) ; e) a xia l movement o f the table (R’- a xi s) , where ava i lable; f) p o s s ible (op tiona l) movement o f rad ia l g) p o s s ible (op tiona l) movement o f the ro tar y table (B ’- a xi s) Figure fac i ng s l ide ( U- a xi s) ; s hows two typic a l figuration s o f s uch mach i ne s T he de s ignation o f the figu ration with fi xe d table i s: w b X Y Z W (C ) t where a s the de s ignation o f the figuration with ro to -tra n sl ati ng table i s: w B ’ R’ b X Y Z W (C ) t NO TE T he fo u nd atio n i s ver y i mp or ta nt fo r the s e m ach i ne to o l co n figu ratio n s T he de s ign atio n “ b” mach i ne s typ ic a l l y i nclude s the b e d o n the workp ie ce s ide , the fou nd ation , for the s e a nd the b e d o n the to ol s ide Table provides the nomenclature for various structural components of machines shown in Figure © ISO 2016 – All rights reserved ISO 070-2 :2 016(E) NOTE For elements to 10, see Table Figure — Machine with movable column along the X-axis with (optional) roto-translating table Table — Nomenclature (see Figure 1) Figure ref 10 NO TE English French bed column base spindle head ram column spindle banc base du montant chariot porte-broche coulant montant broche fi xe d tab le tab le fi xe table bed banc de la table trnard de la table rotative table rotative ro ta r y tab le s add le ro ta r y tab le Russian станина о снов ан ие с той ки ш п и н де л ьн а я бабк а п о д в и ж н ы й ко р п ус ш п и н де л я с т о й ка ш п и н де л ь н еп о д в и ж н ы й с т о л о снов ан ие с то л а кар е т ка п о в о р о т н о г о с т о л а пов оро тны й сто л I n add ition to the ter m s u s e d i n the th re e I S O o ffic i a l l a ngu age s , p re s ente d i n th i s tab le , Table C.1 provides the e qu iva lent term s i n I ta l i a n a nd Pers i a n; the s e a re pub l i s he d u nder the re s p o n s ib i l ity o f the memb er b o dy I n ( I S I RI ) a nd a re g iven fo r i n fo rm atio n fo r I ta l y ( U N I ) a nd o n ly O n ly the ter m s given i n the o ffic i a l l a ngu age s c a n b e co n s idere d a s I S O term s Special remarks concerning particular elements 5.1 Spindle heads Reference should be made to Figure f is given in Table or example s o f the variou s typ e s o f he ad Rel ate d nomenclature Faci ng he ad s genera l ly have a rad ia l te s ts are s p e c i fie d i n Annex B © ISO 2016 – All rights reserved faci ng sl ide and i n mo s t c as e s are acce s s orie s Releva nt ge ome tric ISO 070-2 :2 016(E) a) Headstock for boring and milling NOTE b) Headstock with facing head c) Headstock with ram For elements to 5, see Table Figure — Types of headstocks Table — Nomenclature (see Figure ) Figure ref NO TE English French Russian boring spindle milling spindle facing head headstock with facing head broche d’alésage broche de fraisage plateau surfacer bélier avec plateau surfacer ram coulant р ас т о ч н ы й ш п и н де л ь ф р е з е р н ы й ш п и н де л ь п л а н ш а й ба ш п и н де л ьн а я бабк а с п л а н ш а й бо й п о д в и жн ы й ко р п ус ш п и н де л я I n add itio n to the ter m s u s e d i n the th re e I S O o ffic i a l l a ng uage s , gi ven i n th i s tab le , Table C.2 provides the equivalent ter m s i n I ta l i a n a nd Pers i a n; the s e a re pub l i s he d u nder the re s p o n s ib i l ity o f the memb er b o dy and a re gi ven 5.2 fo r fo r I ta ly ( U N I ) and I n (I S I RI ) i n for m atio n o n ly O n ly the ter m s given i n the o ffic i a l l ang u age s c a n b e s idere d a s I S O ter m s Tables I n mo s t c as e s , th i s typ e o f mach i ne s i s provide d with b o th fi xe d table s a nd movable table s with l i ne ar and ro tar y movements T he ro tar y movement o f the table may b e u s e d a) angu la r p o s ition i ng o f the workpie ce; b) a s a c i rc u la r work fe e d for for the fol lowi ng pu rp o s e s: m i l l i ng op eration s; c) circular cutting movements for turning operations © ISO 2016 – All rights reserved ISO 070 -2 : 01 6(E) Object P3 C he cki ng o f acc u rac y a nd rep e atabi l ity o f p o s ition i ng o f the ram movement (Z- a xi s) b y numeric a l control, EZZ Diagram Key laser head interferometer Measured length Tolerance ≤500 a EZZ , A a EZZ , EZZ , f f EZZ , R Mean reversal value of Z-axis EZZ,Bmean a f EZZ , E a Mean bi-directional positioning error of Z-axis EZZ , M B i- d i re c tiona l p o s ition i ng acc urac y o f Z- a xi s Unid i re c tiona l p o s itioni ng rep e atabi l ity o Z- a xi s B i- d i re c tiona l p o s itioni ng rep e atabi l ity o Z- a xi s Bi-directional s ys tematic positioning error o Z-axis a M ay provide a b a s i s for refle c tor R↑; R↓ 0,014 0,007 0,011 0,005 0,008 0,003 ≤1 0 0,020 0,009 0,014 0,006 0,011 0,005 ≤2 000 0,022 0,011 0,017 0,008 0,013 0,006 Measured deviation mach i ne accep tance Measuring instruments Laser measurement equipment or linear scale Observations and references to ISO 230-2:2014, Clause 3, 5.3.2 and 5.3.3 The linear scale or the beam of the laser measurement equipment shall be set parallel to the travelling axis Positioning feed speed shall be agreed between manufacturer/supplier and user The position of the starting point of measurement shall be stated Number and position of 000 test segment(s) shall be stated in the test report 40 © ISO 2016 – All rights reserved ISO 070-2 : 01 6(E) Object P4 C he cki ng o f acc u rac y and rep e atabi l ity o f p o s itioni ng o f the s l id i ng b ori ng s pi nd le movement ( W- a xi s) b y numeric a l control , Diagram EZW Key laser head interferometer Tolerance a EZW, A a f EZW, EZW, f EZW, R Mean reversal value of W-axis EZW,Bmean a EZW, E f Mean bi-directional positioning error of W-axis a EZW, M a f B i- d i re c tiona l p o s ition i ng acc u rac y o f W- a xi s Un id i re c tiona l p o s ition i ng rep e atabi l ity o B i- d i re c tiona l p o s itioni ng rep e atabi l ity o W- a xi s W- a xi s B i- directional s ys tematic positioning error o M ay provide a b as i s W-a xis R↑ ; R↓ refle c tor Measured length Measured