1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991 10 21 NC00E10079779012 Revised & Updated A. Yuhas1984 05 03 CEN2-897050-CB Revised 3.1.1 N. Gribble1980 11 05 CAK2-878234-C Released K.P. FrancisWP 3948-a Page 1 of 4 ELASTOMERIC PARTS, MINIMUM
2、 QUALIFICATION AND ESA-M9P7-AACCEPTANCE TEST REQUIREMENTS1. SCOPEThis specification establishes the minimum qualification and acceptancetest requirements for molded and extruded elastomeric parts.2. APPLICATIONThis s pecification was released originally to establish requirements thatare nece ssary t
3、o produce and determine the acceptability of Chassisela stomeric parts. Compliance with all of the requirements in thisspecific ation must be demonstrated prior to ISIR approval and at thespecif ied frequency on a continuing basis. Revalidation will be requiredif any change is made that may affect p
4、art function and/or performance.3. REQUIREMENTS3.1 QUALIFICATION TESTS3.1.1 Raw MaterialOscillating Disk Rheometer or Shearing Disk Viscometer(ASTM D 2084 or ASTM D 1646, respectively)Each batch must have a curve or viscosity and scorch datathat corresponds to the original compound approv ed for use
5、 byMa terials Engineering. This correspondence shall beestablished by the compounder through consecutiv e analysis ofthe initial batches used to mold acceptable parts utilizingestablished operating parameters.3.1.2 Slab StockEach batch must be tested by approved methods to the original(unaged) requi
6、rements for tensile strength, elongation,hardness, and modulus as shown in the material s pecification,prior t o release to production. All other slab stockrequirements including aging tests must be perfo rmed prior toin itial sample approval and a minimum of once every sixmonths.ENGINEERING MATERIA
7、L SPECIFICATIONESA-M9P7-AWP 3948-b Page 2 of 4 3.2 ACCEPTANCE TESTS - MOLDED OR EXTRUDED PARTS3.2.1 Specific Gravity +/- 0.03(ASTM D 792)Hardness - Micro +/- 5(ASTM D 1415)Each supplier must esta blish values for their compound priorto i nitial approval and be able to maintain these valueswithin the
8、 given tolerance. A minimum of 3 samples per lot(8 h production maximum) must be tested after vulcanizationprior to secondary operations. A sampling pattern shall bees tablished so that samples tested will vary and representeach part in a multicavity system.3.2.2 Infrared Spectrophotometry and/or Th
9、ermal AnalysisFord Motor Company, at its option, may conduct infraredand/o r thermal analysis of material/parts supplied to thisspeci fication. The IR spectra and thermograms establishedfor initial approval sh all constitute the reference standardand s hall be kept on file at the designated material
10、laborat ory. All samples shall produce IR spectra andtherm ograms that correspond to the reference standard whentested under the same conditions.3.3 ADJUSTMENTS TO TEST PLANAlternate tests and/or frequencies must be authorized in writing byth e Ford Supplier Quality Assurance, Product Engineering an
11、dMaterials Engineering Office representatives.3.4 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respectto these properties s
12、hall be clearly designated on the engineeringdrawing.3.5 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used t
13、o analyze process/product data sothat variation in the final product is continuously reduced.3.6 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior t
14、o testing and tested under thesame conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONESA-M9P7-AWP 3948-b Page 3 of 4 3.7 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasorigina
15、lly granted.Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify
16、 Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regula
17、tions or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by thi
18、s specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to t
19、he affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designa
20、tion a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering
21、Material ApprovedSource List.5. GENERAL INFORMATIONThe information below is provided for clarification and assistance inmeeting the requirements of this specification.5.1 ACC EPTANCE TESTS are those tests specified on Ford ProductEngineering, applied (w herever possible) to the production part, foru
22、se as an acceptance criterion on a continuing basis duringproduction.ENGINEERING MATERIAL SPECIFICATIONESA-M9P7-AWP 3948-b Page 4 of 4 5.2 LOT defi nes a homogeneous quantity of parts produced during aspecified period of time from the final operation, and which can beclearly identified and isolated.
23、 Unless otherwise specified by theappli cable Engineering Material Specification(s), lot size shallnormally represent parts produced during a perio d not exceeding eighthours o r one working shift and not exceeding 250 000 pieces.Produ ction processes shall be a factor in determining lot sizes,which
24、 must be acceptable to the Ford representative.5.3 BATCH defines a specific quantity of raw material either blended orcomp ounded at a supplier location for use at that facility.Nor mally, a batch of raw materials will represent that quantityprocess ed in a given vessel at a given time. Batches can
25、varysignificantly in weight and/or volume, but generally can be definedby the total quantity of constituent materials mixed at one time.5.4 QUALIFICATION TESTS are those tests specified by Ford ProductEngineering, in the Eng ineering Material Specification, and are usedto qualify materials to engineering requirements. Qualificationtests and acceptance tests must be performed as part of the initialsample approval. Quali fication tests shall be used as necessary forraw ma terial approval, blending or compounding control and whenquestions regarding material quality arise.
