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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2013 SAE International All rights reserved. No part of this pu
3、blication 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: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970
4、 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/ARP142CAEROSPACERECOMMENDED PRACTICEARP142 REV. CIssued 1943-07 Revised 2004-02 Sta
5、bilized 2013-12 Superseding ARP142B Assembling of Studs in Aluminum and Magnesium RATIONALEThis document has been determined to contain basic and stable technology which is not dynamic in nature. This standard has been stabilized. STABILIZED NOTICE This document has been declared “Stabilized“ by the
6、 SAE E-25 General Standards for Aerospace and Propulsion Systems Committee and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical requirements. Newer technology may exist. Copyright SAE International Pro
7、vided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1. SCOPE: This document covers the recommended basics to be considered when assembling cadmium plated steel studs with rolled threads into cast, or forged, aluminum or magnesium part
8、s.2. APPLICATION: This specification covers a suggested procedure for the assembling of cadmium plated steel studs with rolled threads into cast or forged aluminum and magnesium. 3. ASSEMBLING TORQUE: Studs should be assembled with a minimum torque sufficient to resist backing out when a self lockin
9、g nut is used and the maximum torque should not be great enough to damage the stud when driving. Suggested torques are given in Table 1. 4. LUBRICANT: Lubricants, when assembling studs, should be used with care. Anti-seize compound composed of Petrolatum and Graphite or a 240 viscosity lubricating o
10、il or a compound composed of lead soap base grease and mineral oil may be used. SAE INTERNATIONAL ARP142C Page 1 of 5_Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.1 The lubricant may be applied
11、to the hole or the stud. It is preferred that the lubricant be applied to the hole; however, extreme care should be used so that an excess amount of lubricant will not cause the stud to hydraulic in a blind hole. Use only sufficient lubricant to cover the sides of the threads with a thin layer. 5. S
12、ELECTION OF TAP: A tap should be selected to produce a hole which will permit the assembling of the studs within torque limits specified in Table 1. 6. ASSEMBLING: The torque required for driving a stud is a function of: 6.1 The smoothness of the thread in the tapped hole and on the stud. 6.2 The ac
13、curacy of the thread in the tapped hole and on the stud. 6.3 The accuracy of the lead threads. These and the stud end threads must bear a constant lead relationship. 6.4 The hardness and the physical properties of the material into which the stud is assembled. 6.5 The length of thread engagement. 6.
14、6 The type and amount of lubricant used. 6.7 The quality, thickness and type of plating on the stud. 6.8 The interference fit between the stud and the hole is dependent upon the material the stud is driven into. 7. GENERAL: It is very important that accuracy and the smoothness of the thread and the
15、accuracy of the lead threads be maintained in order to be able to maintain the assembling torque within specification requirements. 7.1 The amount of interference fit required for assembling a stud within the torque specified varies. In soft cast aluminum, maximum interference is required and the am
16、ount decreases with increased hardness; also the amount of interference in magnesium is less than in aluminum for a given hardness of the material. 7.2 To guide in assembling of studs Table 2 forms a part of this specification showing the stud size, material, hardness of the material and the approxi
17、mate interference fit. SAE INTERNATIONAL ARP142C Page 2 of 5_Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 1 SAE INTERNATIONAL ARP142C Page 3 of 5_Copyright SAE International Provided by IHS
18、under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 2 SAE INTERNATIONAL ARP142C Page 4 of 5_Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 2 (continued) SAE INTERNATIONAL ARP142C Page 5 of 5_Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
