EN 586-3-2001 en Aluminium and Aluminium Alloys - Forgings - Part 3 Tolerances on Dimensions and Form《铝和铝合金 锻件 第3部分 尺寸和形状公差》.pdf

1、RATIFIED EUROPEAN TEXT EN5 8 6 -3 2 O0 1 European Standards only exist formally as national transpositions (i.e. a BS EN for the UK) of a commonly agreed “ratified“ text. This document will shortly be published as a British Standard. It is being made available in advance of its formal publication to

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3、s when using the document. O The British Standard may contain additional information in the national foreword or national annex, 0 Full rights confened by compliance with the standard may only be granted by reference to the formal national transposition of the text as a British Standard. This docume

4、nt was approved by CENKENELEC in its three official languages on the date given below. Under CENKENELEC rules, BSI is obliged to publish its national transposition within six months of this date. This ratified text was approved on 200 1-09-30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY

5、COPRIGHT LAW COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCOPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 586-3 October 2001 ICs 77.150.10 English version Alumini

6、um and aluminium alloys - Forgings - Part 3: Tolerances on dimensions and form Aluminium et alliages daluminium - Pices forges - Partie 3: Tolrances sur dimensions et forme Aluminium und Aluminiumlegierungen - Schmiedestcke - Teil 3: Grenzabmae und Formtoleranzen This European Standard was approved

7、by CEN on 30 September 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national sta

8、ndards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to

9、the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United

10、Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 586-3:2001

11、 E COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Contents Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions 5 4 Identification of symbols . 6 5 General requirements 7 Technical conditions for inspection and delivery 7 5

12、.1 5.2 Application of tolerances 7 5.3 Summarised references 7 5.4 Chemical composition . 8 5.5 Alloy groups . 8 6 Tolerances on dimensions and form . 6.1 Die forgings Annex A (informative) Design guidelines for die and hand forgings 30 Bibliography 56 6.2 Hand forgings . 25 2 COPYRIGHT European Com

13、mittee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Foreword This European Standard has been prepared by Technical Committee CEN /TC 132, ”Aluminium and aluminium alloys”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of

14、a national standard, either by publication of an identical text or by endorsement, at the latest by April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132WG3 “Forgings and cast a

15、nd wrought forging stock”to prepare the following standard : EN 586-3, Aluminium and aluminium alloys - Forgings - Part 3 : Tolerances on dimensions and form This standard is part of a set of three standards. The other standards deal with : EN 586-1, Aluminium and aluminium alloys - Forgings - Part

16、I : Technical conditions for inspection and delivery EN 586-2, Aluminium and aluminium alloys - Forgings - Part 2 : Mechanical properties and additional properties Annex A is informative. This standard includes a Bibliography. According to the CENKENELEC Internal Regulations, the national standards

17、organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 COPYRIGHT Euro

18、pean Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) 1 Scope This European Standard specifies the tolerances on dimensions and form of aluminium and aluminium alloy forgings for general engineering applications of usual design concepts which are formed hot. It

19、 applies to : - die forgings without machining all over : shape dimensions nmax O Q rn C C c o - .- .- E 5 .- 3 u) rn C .- ic E .- E 8 ic u) C O u) C .- o 3 u) O o a o C O u) a o C a O + E - .- E I 2 - r- a - G mr +i 3- 0 *ci ti o 0 .,ci ti O +i *- nj G wr +i 9 d wr +i rC rr +i n W U 3 3 r O O d O m

20、 W 3 0 v 3 3 3 * 3 3 0 u - O in w O O d z W COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) 6.1.4 Mismatch (offset) 6.1.4.1 General Mismatch (offset) is the distance rn between a given point in that part of the forging on one side of the par

21、ting plane and the corresponding point on the opposite side. Measurement shall be taken as shown in Figure 6. Intended construction Key 1 Longitudinal mismatch (offset) 2 Transverse mismatch (offset) Mismatch (offset) Figure 6 - Mismatch (offset) The tolerance for mismatch (offset) is independent of

22、 other dimensional tolerances and shall be applied separately. The basis for establishing such tolerances shall be the overall dimension of the forging nmax viewed in the direction of forging (see Figures 4 and 5). 6.1.4.2 Forgings without machining all over The mismatch (offset) tolerances on forgi

23、ngs without machining all over shall be as specified in Table 8 For wall thickness the mismatch (offset) tolerances shall be based on the largest nominal thickness and inboard draft angle (see Figure 7). 17 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 5

24、86-312001 (E) Nominal dimension nmax Mismatch (offset) tolerance Mt Dimensions in millimetres Up to Over 50 Over 120 Over 315 Over 600 Over 1 O00 50 to 120 to 315 to600 to1 O00 to2000 0,3 0,4 0,6 0,8 1 ,O 1,4 2 3 Key 1 Nominal wall thickness 2 3 Projected area = 120 cmz Example wall thickness mismat

25、ch (offset) Figure 7 - Wall thickness mismatch (offset) for forgings without machining all over Table 8 - Tolerances on mismatch (offset) for forgings without machining all over Dimensions in millimetres The mismatch (offset) tolerance for wall thickness of forgings without machining all over shall

26、be determined using the following formula : mismatch (offset) tolerance for wall thickness = Dt x tan j3+ Mt . where Dt is the die closure tolerance according to Table 5 when tmax is taken as the nominal wall thickness and projected area A = n1 x n2 (see Figure 3), is the inboard draft angle, and M

27、is the mismatch (offset) tolerance according to Table 8 where nmaxis taken as the nominal wall thickness. 18 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEXAMPLE Projected area A nominal wall thickness Nominal dimension nmax Mismatch (offset) Mt inboard dr

28、aft angle up to 250 Over 250 Over 400 Over 630 Over 1 O00 Over 1 600 Over 2 500 Over 4 O00 to 400 to 630 to 1 O00 to 1 600 to 2 500 to 4 O00 to 6 O00 03 1 ,o 12 13 13 2,1 23 3,O Applying the formula : For Plus tolerance : EN 586-312001 (E) = 120 cmz =8mm = IO“ (tan = 0,176 3) Ilt = + 0,8 mm ; Mt = +

29、 0,3 mm = (+ 0,8 mm x 0,176 3) + 0,3 mm = + 0,44 mm for Minus tolerance : Ilt = - 0,5 mm ; Mt = - 0,3 mm = (- 0,5 mm x 0,176 3) - 0,3 mm = - 0,39 mm mm - +0,45 -0.40 - Mismatch (offset) tolerance for wall thickness (rounded to nearest 0,051) 6.1.4.3 Forgings with machining all over The mismatch (off

30、set) tolerances on forgings with machining all over shall be as specified in Table 9. Table 9 - Tolerances on mismatch (offset) for forgings with machining all over 6.1.5 Flash and fin projections 6.1.5.1 General Flashes are formed by metal extruding between the mating surfaces of the dies and are e

31、ither cut off by mechanical means or removed using hand tools. Tolerances for the residual flash projections (see Figure 8) shall be as specified in Table IO. The fin or burr formed on the outline of certain forgings during the forming and fettling operations, notably near to the mating surfaces of

32、the dies, known as stamping, fettling or infiltration fins shall also be similarly restricted. Tolerances for fin projections (see Figure 9) shall be as specified in Table 11. 6.1.5.2 Flash projections Tolerances for flash projections shall be as specified in Table IO. Flash projections shall be mea

33、sured as shown in Figure8. 19 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Nominal dimension %ax Flash projection X Up to Over Over Over315 Over600 Over Over Over 50 50 120 to600 to1 200 1200 2000 3000 + 0,4 + 0,6 + 1,0 + 1,8 + 2,5 + 3,O

34、+ 33 + 4,O to120 to315 to 2 O00 to 3 O00 to 6 O00 I I Key 1 Flash projection 2 Theoretical point 3 Direction of forging Figure 8 - Measurement of flash projections 6.1 S.3 Fin projections Tolerances for fin projections shall be as specified in Table 11. Fin projections, defined by height x and width

35、 y, shall be measured as shown in Figure 9. Z 1 Z / 3 Key 1 Infiltration fin 2 Fettling fin 3 Stamping fin Figure 9 - Measurement of fin projections 20 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Nominal dimension Up to 120 Over 120 to 3

36、15 Over 315 to 600 %ax Height x 1 ,O 1,6 23 Width y 03 12 1,6 Table 11 - Tolerances for fin projections Over 600 to 6 O00 4,o 2,O 6.1.6 Roundings and transitions Roundings and transitions (see Figure IO) are required to facilitate forging (see also A.l .IO). 1 Key 1 Transition bend (fillet radius) 2

37、 Rounded edge (corner radius) Figure 10 - Roundings and transitions Tolerance for roundings and transitions shall be +IO % of the nominal radius dimension but not less than f 1 mm. 6.1.7 Ejector marks Ejector marks are areas on the forgings surface, either recessed or raised, residual from ejectors

38、included in the dies to facilitate release of the part (see Figure 11). Tolerances for ejector marks shall be as specified in Table 12. The basic dimension for establishing such tolerances shall be the projected area A (see Figure 3). The diameter and location of ejector marks shall be agreed betwee

39、n supplier and purchaser. Tolerances for ejector marks are independent of other dimensional tolerances and shall be applied separately. 21 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Projected Area A (cm) Ejector mark deviation from forg

40、ing surface (mm) 2 Upto Over Over Over400 Over Over Over Over Over 100 100 200 to800 800to 1200 2000 4000 6000 to 200 to 400 1 200 to 2 000 to 4 000 to 6 000 to 9 000 f 0,4 f 0,7 f 1,l f 1,5 f 1,9 f2,3 f 2,7 f 3,2 f 3,7 Key 1 Ejector mark (recessed) 2 Ejector mark (raised) Figure 11 - Ejector marks

41、Table 12 - Tolerances on ejector marks 2 14 000 I f45 I f60 If the purchaser requires that ejector marks be wholly recessed or wholly raised the tolerance range applies. EXAMPLE ejector mark recessed only or an ejector mark raised only would apply as For a forging with a projected area A of 80 om2 t

42、he ejector mark tolerance is f 0,4 mm. The tolerance for an O - 0,8 mm or +f8 mm respectively. 6.1.8 Flatness and straightness Warpage or distortion of the forging profile may occur as a result of the forging or heat treatment operations. Maximum deviations from flatness and straightness are indepen

43、dent of other dimensional tolerances and shall be applied separately. The basis for establishing such deviations is the largest overall dimension of the forging nmax viewed in the direction of forging see Figures 12 and 13). Measurement of deviation from flatness shall be made from a reference level

44、 (surface table or formed by three interrelated datum points, see Figures 12 and 13), whilst deviation from straightness shall be determined using a straight edge (see Figure 13). Datum points, where used, shall be agreed between purchaser and supplier at the time of ordering. For establishing datum

45、 points, see A.1.15. 22 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) fl mar Key 1 Datum points Figure 12 - Measurement of deviation from flatness fusing three datum points as a reference level Key 1 Surface table or straight edge Figure 1

46、3 - Measurement of deviation from flatness for straightness s using a surface table or straight edge as a reference level Where the variation extends to both sides of the reference level (dimension fin Figure 12) deviation from flatness shall be governed by a positive and negative tolerance. Where t

47、he variation is contained wholly on one side of the reference level (dimensions fand s in Figure 13), deviation from flatness and straightness shall be governed by a positive tolerance only. Tolerances for maximum deviation from flatness and straightness shall be as specified in Table 13. 23 COPYRIG

48、HT European Committee for StandardizationLicensed by Information Handling ServicesEN 586-312001 (E) Maximum length dimension %ax Over Up to and including 1 O0 Table 13 - Maximum deviation from flatness and straightness of die forgings Dimensions in millimetres Maximum deviation Maximum deviation fro

49、m from flatness f (see Figure 12) flatness f and straightness s (see Figure 13) f 0,7 1 ,O 1 O0 160 160 f l,o 12 250 f 1.1 1,3 I 250 I 400 I f 1,2 I 13 I 400 630 1 O00 630 f 1,5 2,O 1 O00 f 1,9 23 1600 f 2,4 32 1600 2 500 I 4 O00 I 6 O00 I f 6.0 I 8,O I 2 500 f 3,O 4,o 4 O00 f 4.5 6,O 6.1.9 Angles 6.1.9.1 General Angles occur as either draft or non draft types. Draft angles describe the taper applied to the side walls of the die impressions in order to facilitate removal of the part after forging. These lie in a plane perpendicular to the die parting plan