SAE AS 6414A-2017 Manufacturing Processing Requirements for Molded Elastomer Components Used in Aerospace Applications.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 ther

2、efrom, 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 2017 SAE International All rights reserved. No part of this

3、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: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49

4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS6414A AEROSPACE STANDARD AS6414 REV. A Issued 2016-08 Revised 2017-06 Superseding AS6414 Man

5、ufacturing Processing Requirements for Molded Elastomer Components Used in Aerospace Applications RATIONALE This revision changes the CERTIFICATE OF CONFORMANCE requirement to CERTIFICATE OF ANALYSIS, clarifies blended batch requirements and updates references. 1. SCOPE 1.1 Application This specific

6、ation is applicable to the processes that are used in the manufacture of aerospace elastomer parts utilizing materials conforming to AMS7XXX series specifications, user specifications, or print on a Purchase Order (PO) that calls out this document for aerospace applications. The elastomer parts are

7、in the form of O-rings, plate seals and other compression seals. 1.2 Safety-Hazardous Materials While the use of materials, applications and processes described or referenced in this specification may involve hazardous materials, this specification does not address the hazards involved in their use.

8、 It is the responsibility of the manufacturer to provide the purchaser with the safe and proper use of materials and processes and to take necessary precautionary measures and training of personnel to ensure the health and safety of all personnel involved. However, it is not addressed in this docume

9、nt. 1.3 Order of Precedence This specification is in addition to and in no way limiting, superseding, or abrogating any contractual obligation as required by the applicable procurement document. In the event of conflict in requirements, the order of precedence shall be: 1. Procurement Document or Co

10、ntractual Agreement (excluding this document) 2. Applicable purchasers drawing 3. Specifications referenced on the drawing 4. This document 5. All specifications referenced in this document SAE INTERNATIONAL AS6414A Page 2 of 13 2. REFERENCES 2.1 APPLICABLE DOCUMENTS The following publications form

11、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 cited herein,

12、 the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (ins

13、ide USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2750 Pyrometry AMS2817 Packaging and Identification, Preformed Packings ARP5316 Storage of Elastomer Seals and Seal Assemblies Which Include an Elastomer Element Prior to Hardware Assembly AS568 Aerospace Size Standard for O-Rings

14、 AS5752 Aerospace - Visual Inspection Standard for Elastomeric Sealing Elements Other than O-Rings AS9100 Quality Management Systems - Requirements for Aviation, Space and Defense Organizations 2.1.2 ANSI Accredited Publications Copies of these documents are available online at http:/webstore.ansi.o

15、rg/. ANSI/ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 2.1.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D1414 Standard Test Methods for Rubber O-Rings ASTM

16、D2240 Standard Test Method for Rubber Property-Durometer Hardness ASTM D7969 Standard Specification for Gravity Convection and Forced Ventilation Ovens ASTM E145 Standard Specification for Gravity-Convection and Forced-Ventilation Ovens SAE INTERNATIONAL AS6414A Page 3 of 13 2.1.4 ISO Publications C

17、opies of these documents are available online at http:/webstore.ansi.org/. ISO 3601-1 Fluid Power Systems O-Rings Part 1: Inside diameter, cross sections, tolerances and size identification codes ISO 3601-3 Fluid Power Systems O-Rings Part 3: Quality Acceptance Criteria ISO 9001 Quality management s

18、ystems Requirements ISO 17025 General requirements for the competence of testing and calibration laboratories ISO 27996 Aerospace Fluid Systems Elastomer Seals Storage and Shelf Life 2.1.5 PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, T

19、el: 724-772-1616, www.pri-network.org. AC7115 Nadcap Audit Criteria for Manufacture of Elastomer Seals AC7122-P Nadcap Audit Criteria for Non Metallic Materials - Testing Laboratories P - Part Manufacturers Captive Laboratories AC7122/1 Nadcap Audit Criteria for Non Metallic Materials - Testing Labo

20、ratories - Mechanical Testing AC7122/2 Nadcap Audit Criteria for Non Metallic Materials - Testing Laboratories - Physical Testing AC7122/3 Nadcap Audit Criteria for Non Metallic Materials - Testing Laboratories - Chemical Testing AC7122/4 Nadcap Audit Criteria for Non Metallic Materials - Testing La

21、boratories - Thermal Analysis PD2102 Aerospace Quality Assurance Product Standards, Qualification Procedure, Elastomeric Seal 2.2 Definitions BATCH: The quantity of a compound run through a mill or mixer at one time. Mixing of batches of previously compounded material restricted to the requirements

22、of this document. BATCH TESTING (BATCH ACCEPTANCE TESTING or BATCH CONFORMANCE TESTING): Material property testing on a batch of compound through identified industry test methods and utilizing the same operating parameters of time, temperature, and pressure that lead to the same state of cure as the

23、 test specimens used to generate qualification data. The batch testing or acceptance tests and methods are identified within the applicable specification. In the event no specimen type or test method is identified then durometer (ASTM D2240, Type A), tensile and elongation (ASTM D1414), and specific

24、 gravity (ASTM D1414) shall be utilized. BLENDED: The combination of the same formulation of multiple batches of uncured, conforming material to create a new batch of material of the same formulation. CAPTIVE COMPOUNDER: A rubber mixing operation owned by or otherwise integrated into the same organi

25、zation or management structure as the manufacturer. CAPTIVE LABORATORY: A rubber testing laboratory owned by or otherwise integrated into the same organization or management structure as the manufacturer. CERTIFICATE OF ANALYSIS (CofA): A document that displays the requirements and results with a st

26、atement of conformance for the compounded material or a finished part. CHEMICAL MANUFACTURER: A company that produces compounding ingredients. SAE INTERNATIONAL AS6414A Page 4 of 13 COMPOUND: A general term used to describe a particular formula/formulation that is mixed, uncured rubber material. COM

27、POUNDER: A company that combines raw materials into the form of an uncured product (can be the same as the manufacturer). COMPOUNDING INGREDIENT*: Any material incorporated with an elastomer to form a compound or mix. DEFLASHING: The removal excess rubber at the parting line on molded rubber parts.

28、EXTERNAL COMPOUNDER: An independent rubber mixing operation that is not owned by the manufacturer or otherwise integrated into the manufacturers organization or management structure. FORMULA/FORMULATION: A list containing the identity of the ingredients to be included in a compound. INITIAL QUALIFIC

29、ATION (QPL): Refer to the PD2102 document for the amount of testing required where a full specification testing is based on one batch of data and a second set of verification data is also required. LOT: A quantity of one size of product processed as one entity from a single batch. LOT TESTING: Testi

30、ng on lot samples with the specimen type and test methods as identified within the applicable specification. MANUFACTURER: A company that receives an uncured rubber compound and produces finished product (can be the same as the compounder). MASTER BATCH: The first pass of a multiple pass mix that do

31、es not include curatives. This is not tested. PROCEDURE: An established, documented, implemented and maintained way to carry out an activity or a process. PROCESS: Any activity or set of activities that uses resources to transform inputs into outputs. PURCHASER: A company that procures product direc

32、tly from a particular specification. RECIPE: Based on the formula/formulation wherein the concentration of each ingredient to be present is specified with tolerances. REQUALIFICATION (QPL): Refer to the PD2102 for the amount of testing required. REWORK: The act of reprocessing noncomplying, in-proce

33、ss materials or finished parts, through the use of original or equivalent processing, in a manner that assures full compliance of the final part with applicable drawings or specifications. SUBCONTRACTOR: A company that is hired to perform any function requested by a compounder or manufacturer. WORK

34、INSTRUCTION: A detailed document outlining tasks within a procedure. WORK ORDER: A document that provides all processing conditions for a specific part that accompanies the part through the manufacture process which should include at a minimum reference to the part or drawing being manufactured, the

35、 quantity of material being produced, material identification, material lot identification, material cure date, and reference to the manufacturing process. (*Definitions taken from Fundamentals of Rubber Technology) 3. COMPOUNDER REQUIREMENTS 3.1 Compounder 3.1.1 If an external compounder is used, t

36、hey shall be approved by the manufacturer based upon: 1. Being currently registered to ISO 9001, or SAE INTERNATIONAL AS6414A Page 5 of 13 2. If the compounder is not currently registered to ISO 9001 then the manufacturer shall annually approve the compounder by on-site audit. The compounders qualit

37、y record shall be current and on-file at the manufacturers facility. 3.1.2 A captive compounder shall be qualified as part of the manufacturers AS9100 registration. 3.2 Control of Compounding Ingredients 3.2.1 The compounder shall have a process for receiving and storing compound ingredients until t

38、hey are needed. All compounding ingredients shall be stored according to the chemical manufacturers recommendations and in a work environment per AS9100 to ensure conformity of ingredient requirements. 3.2.2 The compounder shall have a process to identify and maintain initial shelf life of compoundi

39、ng ingredients not to exceed the chemical manufacturers expiration date. 3.2.3 If an extension of shelf life is required, the compounder shall have a process to verify the extension of all compounding ingredients shelf lives. Extended shelf life of any ingredient shall be documented along with the v

40、erification data per the manufacturers standard of work. 3.3 Process for Combination of Compounding Ingredients 3.3.1 Formulation Control 3.3.1.1 The compounder shall have a controlled recipe that specifies formulation or the compounder shall use the manufacturers supplied formulation. 3.3.1.2 The c

41、ompounder shall not change any ingredient in the formulation without the prior written approval of the manufacturer who may require verification testing up to and including full qualification testing prior to approving a change. 3.3.1.3 If required by the customer contract or purchase order, the man

42、ufacturer shall notify the customer of any formulation change. 3.3.2 Mixing 3.3.2.1 The Compounder shall have a documented procedure for the mixing of the compound and shall have evidence that will include but are not limited to: COMPOUND INGREDIENTS AND PROPORTIONS THEREOF WITHIN ESTABLISHED LIMITS

43、 SEQUENCE OF MIXING COMPOUND INGREDIENTS TYPE OF MIXING EQUIPMENT (OPEN MILL OR INTERNAL MIXER) The Compounder shall have evidence that the procedure has been followed and verified. The supplier shall identify those changes which require customer acceptance in accordance with contractual requirement

44、s prior to making any change. Changes affecting processes, production equipment, tools and programs shall be documented. Documented procedures shall be available to control their implementation. The results of changes to production processes shall be assessed to confirm that the desired effect has b

45、een achieved without adverse effects to product quality. 3.3.3 Testing at the Compounder 3.3.3.1 The compounder shall perform the appropriate tests required by the manufacturer to confirm that the manufacturers requirements for each batch have been met and the results shall be documented and availab

46、le upon request by the manufacturer. If required by the manufacturer, the compounder shall also prepare a duplicate series of test samples for the manufacturer. SAE INTERNATIONAL AS6414A Page 6 of 13 3.3.4 Rework at the Compounder 3.3.4.1 Material that fails to meet the initial manufacturers PO requ

47、irements, may be reworked up to a maximum of three (3) times and retested after each rework prior to informing the manufacturer. If the reworked compound meets the initial manufacturers PO requirements for acceptance, then the compound can be shipped with provisional approval pending the manufacture

48、rs review of the compounders data and the manufacturers acceptance testing. 3.3.5 Rejected Compound 3.3.5.1 Compound batches that fail the compounders quality control requirements or those rejected by the manufacturer shall be clearly identified and excluded from use in products requiring AMS7XXX se

49、ries specifications, user specifications, or print on a Purchase Order (PO) that calls out this document for aerospace applications. 4. MANUFACTURING REQUIREMENTS 4.1 General Requirements 4.1.1 The manufacturer shall have a procedure for identification of the status of all batches of compounded material at the production facility (for example, “Hold for Testing”, “Approved”, “Rejected”). 4.1.2 The manufact