SAE AS 478N-2007 Identification Marking Methods《识别标记方法》.pdf

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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE International All rights reserved. No part of this publication m

3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)

4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AS478 REV. N AEROSPACE STANDARD Issued 1960-05 Revised 2007-07 Superseding AS478M Identification Marking Methods RATIONALE Table 1, Class letter column A, added “X” to line “2E2” Vibro Peen, Controlled. This will all

5、ow the additional option of “controlled” to the already allowed manual process. 1. SCOPE This standard provides the following: a. Definition of terms pertaining to marking. b. Symbols for marking location. c. Requirements and restrictions for permanent markings. d. Types of marking methods. e. Rules

6、 for designating marking methods. f. Table listing marking methods. 1.1 Purpose To define and control marking methods, and to provide a method for specifying desired marking methods on aerospace engineering drawings of parts and assemblies. 2. REFERENCES 2.1 Applicable Documents The following public

7、ations form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references c

8、ited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtainied. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitt

9、ed without license from IHS-,-,-SAE AS478 Revision N - 2 - 2.1.1 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. MIL-HDBK-57 Li

10、sting of Fastener Manufacturers Identification Symbols H4/H8 Commercial and Government Entity (CAGE) Codes 2.1.2 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ANSI X3.17 Character Set for Optical

11、 Character Recognition (OCR-A) ANSI X3.93M Character Positioning for Optical Character Recognition (OCR) 2.2 Definitions For the purpose of this standard, the following definitions shall apply: 2.2.1 CONTRACTOR Any individual, company, partnership, association, or corporation holding a contract or l

12、etter of intent to supply items for which this standard is specified. 2.2.2 IDENTIFICATION Any marking applied to an item or its package for the purpose of engineering, manufacturing, or inspection control. Examples are: a. Item number b. Vendor number c. Manufacturers identification d. Inspection s

13、ymbols 2.2.2.1 MANUFACTURERS IDENTIFICATION The actual manufacturers name, registered trademark, or the identification symbol listed in MIL-HDBK-57, or the CAGE code identification established in Cataloging Handbooks H4/H8, or as otherwise specified. 2.2.3 ITEM An article, used in this standard to r

14、elate to a part, assembly, or equipment. 2.2.4 PACKAGE The smallest enclosure into which an item(s) is placed for protection during storage or shipment. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-

15、,-SAE AS478 Revision N - 3 - 2.2.5 PERMANENT MARKING Marking which will ensure identification during the normal service life of the item. Methods of permanent marking are listed in 4.1. 2.2.6 TEMPORARY MARKING Marking which will ensure identification during ordinary handling and storage of items pri

16、or to assembly and use. Under certain service conditions these markings may exhibit the characteristics of permanent markings. Temporary marking methods are listed in 4.2. 2.2.7 OPTICAL CHARACTER RECOGNITION An automatic data entry system that utilizes predefined human readable shaped alphanumeric c

17、haracter fonts which can be read by automatic scanning equipment. 3. GENERAL REQUIREMENTS Items shall be marked in accordance with this standard unless otherwise specified on the item drawing. The method of marking shall be designated as shown in 6.1. 3.1 Marking Location Location of marking on item

18、s shall be in accordance with the following as applicable: 3.1.1 General The symbol as shown in Figure 1, or a local note, indicates general location for marking. FIGURE 1 - SYMBOL FOR GENERAL LOCATION FOR MARKING 3.1.2 Pad The symbol as shown in Figure 2, or a local note, indicates pad location for

19、 marking. FIGURE 2 - SYMBOL FOR PAD LOCATION FOR MARKING 3.1.3 Integral The symbol as shown in Figure 3, or a local note, indicates pad location for integral marking (cast, forged, or molded). FIGURE 3 - SYMBOL FOR LOCATION FOR INTEGRAL MARKING (CAST, FORGED, OR MOLDED) Copyright SAE International P

20、rovided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS478 Revision N - 4 - 3.1.4 Specific The symbol as shown in Figure 4, or a local note, indicates a specified area within which markings must be confined. FIGURE 4 - SYMBOL FOR

21、 SPECIFIED AREA WITHIN WHICH MARKINGS MUST BE CONFINED 3.1.5 Multiple Where two or more locations for marking are specified, markings shall be grouped so that as few of the locations as practicable are used. 3.2 Permanent Markings Permanent markings are permitted on finished items only when specifie

22、d on the engineering drawing from which the item is manufactured. 3.2.1 Items which require more than one identification number, such as item number, serial number, etc., shall have each number on a separate line; or consecutive identification numbers on the same line shall be separated by no less t

23、han two spaces. The separation or division of the digits of an identification number will not be objectionable provided the digits are in sequence and cannot be misread. 3.2.2 Permanent marking for the general categories of items shall normally be between 0.060 and 0.160 inch (1.5 and 4 mm) in heigh

24、t. In special cases when governed by size or configuration, 0.016 inch (0.4 mm) minimum or 0.250 inch (6.35 mm) maximum height is permissible, or as otherwise specified in this standard or on the item drawing. When integral marking is used, the height should not exceed 0.500 inch (12.7 mm) nominal c

25、haracter size. 3.2.3 Permanent marking is not recommended on contacting surfaces, nor on surfaces which are in motion with respect to the mating surface during operation of the items. However, when permanent markings must be placed on such surfaces, all raised metal and burrs shall be removed in acc

26、ordance with the requirements given on the item drawing. 3.2.4 Permanent markings shall not be applied on surfaces which have been chemically processed, painted, or plated unless the marking will be legible and the minimum requirements of the surface treatment process is maintained or restored. 3.2.

27、5 Permanent markings shall not be nearer than 0.031 inch (0.78 mm) to any corner, fillet, or edge unless specifically designated. Where a specific marking location, as designated and dimensioned, does not provide enough area for 0.031 inch (0.78 mm) distance to any edge, corner, or fillet, the marki

28、ngs shall be centered upon the area without breaking over an edge or encroaching into corners or fillets. When parts are machined from previously marked hexagon bar stock, the 0.031 inch (0.78 mm) edge restriction is waived, provided the marking is legible. 3.2.6 Precautions Stress concentrations re

29、sulting from improper applications of marking methods may cause item distortion or failure. Marking methods, such as methods 4 or 6 in Table 1, may produce secondary effects which are detrimental to item reliability and must be properly evaluated to the item design. Items distorted or otherwise dama

30、ged by marking shall be subject to rejection. Permanent markings not in compliance with the limits given in this standard may be the basis for rejection of the items by the purchaser. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permit

31、ted without license from IHS-,-,-SAE AS478 Revision N - 5 - 3.2.7 Legibility Identification marking shall be legible and make full use of the available marking area. Characters shall be block form capital letters and Arabic numerals without serifs, such as “Gothic“ or “Futura.“ Lower case letters ma

32、y be used when required for metric unit symbols. Other characters shall be of similar appearance. Condensed letters and smeared letters shall be cause for rejection. Templates for the electrochemical process may be produced by a conventional typewriter provided legibility is maintained. Processes pe

33、rformed after marking which may reduce legibility (such as vapor or grit blasting, tumbling, etching, etc.) shall be controlled to prevent loss of legibility. Normally all characters shall be legible without magnification. However, where space or surface condition limits the size of characters that

34、may be used, legibility with 3X magnification maximum is permissible when authorized. 3.2.8 Optical Character Recognition (OCR) Marking requirements for the standard OCR-A character set are specified in ANSI X3.17. The OCR-A marking characters height, width, spacing and positioning requirements are

35、specified in Table 2. See 6.1.1 for an example of designating OCR font marking method. 4. MARKING METHODS 4.1 Permanent Markings Permanent markings shall not affect the function or serviceability of the item. 4.1.1 Integral Characters are produced by casting, forging, or molding into or onto the ite

36、m. 4.1.2 Metal Stamp Characters are produced by forcible displacement of material. 4.1.2.1 Hammer Characters are produced individually or in groups by impact force applied mechanically or by hand. 4.1.2.2 Press Characters are produced individually or in groups with a controlled force applied without

37、 impact. 4.1.2.3 Roll Characters are produced by a rotating motion of either the item or the tool, or both, when in contact with each other under a controlled force. 4.1.2.4 Vibro Peen, Manual Characters are produced by a hand guided rapidly vibrating tool having a pointed tip making indentations on

38、 the item to produce the characters. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 1 - MARKING METHOD NUMBER, CLASS LETTER, AND DEPTH METHOD NUMBER DEPTH INCH MILLIMETER CLASS LETTER 1STTIER

39、2NDTIER 3RDTIER PARAGRAPH REFERENCE SEE NOTE 1 MARKING METHOD See Para 3.2.6 MIN MAX MIN MAX ABCDEFGHJKLMNPR1A 1A1 1A2 4.1.1 - - A A PERMANENT MARKING METHODSINTEGRAL Light Raised Depressed 0.005 0.005 0.010 0.010 0.13 0.13 0.25 0.25 X X1B 1B1 1B2 - - Intermediate Raised Depressed 0.008 0.008 0.035

40、0.035 0.20 0.20 0.89 0.89 1 1C Heavy(Raised Only) 0.030 0.130 0.8 03.3 2A 2A1 2A2 4.1.2 4.1.2.1 - - B C METAL STAMP Hammer ShallowDeep 0.001 0.004 0.006 0.010 0.03 0.10 0.15 0.25 XXX2B 2B1 2B2 4.1.2.2 - D E Press ShallowDeep 0.001 0.004 0.006 0.010 0.03 0.10 0.15 0.25 XXXXX2C 2C1 2C2 4.1.2.3 - D E R

41、oll ShallowDeep 0.001 0.004 0.006 0.010 0.03 0.10 0.15 0.25 XXXXXXXX2D 2D1 2D2 4.1.2.4 - D E Vibro Peen, Manual ShallowDeep 0.001 0.004 0.006 0.010 0.03 0.10 0.15 0.25 XXXXXXX2E 2E1 2E2 4.1.2.5 - - - Vibro Peen, Controlled ShallowDeep (a) 0.002 0.002 0.006 (a) 0.05 0.05 0.15 XXXXXXX2 2F 2F1 2F2 2F3

42、4.1.2.6 - - - - Dot-Peening ShallowIntermediate Deep (a) 0.001 0.002 0.002 0.004 0.006 (a) 0.03 0.05 0.05 0.10 0.15 XXXXX XXXX3A 4.1.3 4.1.3.1 - F ENGRAVE Manual 0.0005 0.006 0.013 0.15 XX3 3B 3B1 3B2 4.1.3.2 - G H Controlled ShallowDeep 0.0005 0.0020 0.003 0.006 0.013 0.050 0.08 0.15 XXXXX XXXXSAE

43、AS478 Revision N - 6 - Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 1 (CONTINUED) METHOD NUMBER DEPTH INCH MILLIMETER CLASS LETTER 1STTIER 2NDTIER 3RDTIER PARAGRAPH REFERENCE SEE NOTE 1 MARK

44、ING METHOD See Para 3.2.6 MIN MAX MIN MAX ABCDEFGHJKLMNPR4A 4A1 4A2 4.1.4 4.1.4.1 - - - - PERMANENT MARKING METHODSELECTRIC ARC SCRIBE Manual ShallowDeep 0.001 0.003 0.003 0.010 0.030 0.080 0.08 0.25 4 4B 4B1 4B2 4.1.4.2 - M - Controlled ShallowDeep 0.0005 0.0010 0.001 0.006 0.013 0.030 0.03 0.15 X5

45、A 4.1.5 4.1.5.1 - F SCRIBE Manual 0.001 0.006 0.03 0.15 XX5 5B 5B1 5B2 5B3 4.1.5.2 - G J - Controlled ShallowDeep Extra Shallow0.0010 0.0020 0.0002 0.0030 0.0060 0.0007 0.030 0.050 0.005 0.080 0.150 0.018 XXXXX XXXXX6 6A 6B 6C 4.1.6 - K - L ACID ETCH (See 4.1) ShallowIntermediate Deep (a) 0.0005 0.0

46、010 0.0005 0.0010 0.0030 (a) 0.013 0.030 0.013 0.030 0.080 XXX X7A 7A1 7A2 7A3 4.1.7 4.1.7.1 - - - - - ELECTRICHEMICAL ETCH (See 4.1) Etch ShallowIntermediate Deep (a) (a) (a) 0.001 0.003 0.005 (a) (a) (a) 0.03 0.08 0.13 XXXX XXXX7B 4.1.7.2 - - Deposit Raised (a) 0.0004 (a) 0.010 7C 7C1 7C2 7C3 4.1.

47、7.3 - - - - AC Etch ShallowIntermediate Deep (a) (a) (a) 0.001 0.003 0.005 (a) (a) (a) 0.03 0.08 0.13 XXXXXXXX7 7D 4.1.7.4 - AC Etch DC Deposit (a) 0.0005 (a) 0.013 X8 8A 8B 8C 4.1.8 - K G G BLAST ShallowDeep Intermediate (a) 0.0010 0.0003 0.0005 0.0030 0.0010 (a) 0.030 0.008 0.013 0.080 0.030 XX XX

48、 XX XX XXXSAE AS478 Revision N - 7 - Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 1 (CONTINUED) METHOD NUMBER DEPTH INCH MILLIMETER CLASS LETTER 1STTIER 2NDTIER 3RDTIER PARAGRAPH REFERENCE SEE NOTE 1 MARKING METHOD See Para 3.2.6 MIN MAX MIN MAX ABCDEFGHJKLMNPR9 9A 4.1.9 4.1.9.1 - - PERMANENT MARKING