SAE-AS-9132A-2005.pdf
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1、 AEROSPACE STANDARD (R) Data Matrix Quality Requirements for Parts Marking 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 suitabilit
2、y for any particular use, including any patent infringement arising therefrom, 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
3、2005 SAE International All rights reserved. No part of this publication may 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:
4、Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org Issued 2002-02 Revised 2005-02 Superseding AS9132 AS9132 REV. A TABLE OF CONTENTS 1. SCOPE 2 1.1 Convention.2 2. NORMATIVE REFERENCES3 3. MARKING REQUI
5、REMENTS 3 3.1 General Requirements.3 3.2 Dot Peening .4 3.3 Laser10 3.4 Electro-Chemical Etching.19 4. MARKING VERIFICATION25 5. MARKING VALIDATION AND MONITORING.25 6. NOTES.25 APPENDIX A DOT PEENING DATA CAPACITY GUIDELINES FOR SELECTED SURFACE TEXTURES26 APPENDIX B DOT PEENING - RECOMMENDATION FO
6、R STYLUS GRINDING28 APPENDIX C EXAMPLES OF REQUIRED TOLERANCES WITH REFERENCE TO THE NOMINAL MODULE SIZES FOR DOT PEENING.30 APPENDIX D EXAMPLE METHODOLOGY FOR CHECKING DOT PEEN CHARACTERISTICS32 APPENDIX E VISUAL QUALITY GUIDELINES - ELECTRO CHEMICAL ETCHING .36 -,-,- SAE AS9132 Revision A - 2 - 1.
7、 SCOPE: This SAE Aerospace Standard (AS) defines uniform Quality and Technical requirements relative to metallic parts marking performed in using “Data Matrix symbology“ used within the aerospace industry. The ISO/IEC 16022 specifies general requirements (data character encodation, error correction
8、rules, decoding algorithm, etc.). In addition to ISO/IEC 16022 specification, part identification with such symbology is subject to the following requirements to ensure electronic reading of the symbol. The marking processes covered by this standard are as follows: Dot Peening Laser Electro-Chemical
9、 Etching Further marking processes will be included if required. This standard does not specify information to be encoded. Unless specified otherwise in the contractual business relationship, the company responsible for the design of the part shall determine the location of the Data Matrix Marking.
10、Symbol position should allow optimum illumination from all sides for readability. 1.1 Convention: The following conventions are used in this standard: The words “shall” and “must” indicate mandatory requirements. The word “should” indicates requirements with some flexibility allowed in compliance me
11、thodology. Producers choosing other approaches to satisfy a “should” must be able to show that their approach meets the intent of the requirement of this standard. The words “typical”, “example”, “for reference” or “e.g.” indicate suggestions given for guidance only. Appendices to this document are
12、for information only and are provided for use as guidelines. Dimensions used in this document are as follows. Metric millimeter sizes followed by inches in brackets unless otherwise stated. -,-,- SAE AS9132 Revision A - 3 - 2. NORMATIVE REFERENCES: Air Transport Association (ATA), Spec2000, chapter
13、9 “Bar Coding“ ISO/IEC 16022 “Information Technology - International Symbology Specification - Data Matrix“ AS/SJAC/PrEN 9102 Requirements “First Article Inspection Requirements“ 3. MARKING REQUIREMENTS: 3.1 General Requirements: Rows and Columns: Rows and columns connected with Data Matrix symbolog
14、y shall conform to ECC200 in the ISO/IEC 16022 Square versus Rectangle: Matrix may be square or rectangular within ECC200 requirements. Square is preferred for easier reading. Quiet Zone: The quiet zone (margin) around the matrix shall be equal to or greater than one (1) module size. Round Surface:
15、If the marking is made on round/curved surface, the symbol coverage shall be equal to or less than 16% of the diameter (or 5% of circumference). Symbol Size: To facilitate electronic reading of symbol, the overall symbol size should be less than one 25,4 mm (1.000 inch), outside dimension, longest s
16、ide. Irrespective of matrix size used, the requirements included in this standard shall be applied. Angular Distortion of the symbol: Angular deviation of 90-degree axes between row and column shall not exceed 7 degrees (see Figure 1). -,-,- SAE AS9132 Revision A - 4 - FIGURE 1 - Angle of Distortion
17、 3.2 Dot Peening: 3.2.1 Description of Process: Dot-peen marking technology typically produces round indentations on a parts surface with a pneumatically or electromechanically driven pin, otherwise known as a stylus. Critical to the readability of dot-peen marked symbols are the indented dots shape
18、, size, and spacing. The dot size and appearance are determined mostly by the stylus cone angle, marking force, and material hardness. The indented dot created should be suitable to trap or reflect light and large enough to be distinguishable from the parts surface roughness. It should also have spa
19、cing wide enough to accommodate varying module sizes, placement, and illumination. The issues involved in marking and reading dot-peen-marked symbols on metals are different than symbols printed on paper. The first fundamental difference is that the contrast between dark and light fields is created
20、by artificial illumination of the symbol. Therefore, the modules shape, size, spacing, and part surface finish can all affect symbol readability. The key to a successful dot-peen marking and reading project is to control the variables affecting the consistency of the process. Symbol reading verifica
21、tion systems can provide feedback of the process parameters to some extent. Marking system operating and maintenance procedures must be established to help ensure consistent symbol quality. Regular maintenance schedules should be established to check for issues such as stylus wear. Additional proces
22、ses, like machining dedicated surfaces, may be necessary to improve the symbol readability. Cleaning the part surfaces prior to marking with an abrasive pad to remove coatings, rust, and discoloration, or using an air knife to blow away excess machining fluids, debris, or oil can also increase the s
23、ymbol readability. -,-,- SAE AS9132 Revision A - 5 - 3.2.2 Instructions for Determination of Marking Parameters: FIGURE 2 3.2.3 Requirements: Data Matrix Symbol Nominal Module Size: The surface texture of the part affects the quality of a Data Matrix symbol produced by dot peening. Table 1 and Figur
24、es 3 and 4 show the minimum readable module size requirements to the surface texture of the part. The Engineering Design authority shall approve changes to the minimum module size. -,-,- SAE AS9132 Revision A - 6 - TABLE 1 - Minimum Readable Module Size by Surface Texture (Ra) Surface Texture (Ra) M
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