1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1985 11 26 CE3PRO863100E182 3.3.5.2 Revised1979 03 10 CE3HRD740100522 Metricated & Retyped1974 03 04 CE3D-PA750190-E Released (Was XE-M14P5-A)WP 3948-a Page 1 of 4 POLISHING FINISH - ABRASIVE SLURRY
2、 SPIN CLEANING ESE-M14P14-B1. SCOPEThis spe cification defines the finish polishing of parts by the abrasive- slurry spin cleaning method.2. APPLICATIONThis s pecification was released originally for a procedure used primarilyfor po wdered metal parts where a smooth surface, free of burrs and sharpe
3、dges is required in order to provide the following:2.1 Eliminate any break-in period by pre-honing for smooth operation andeli minate any harmful effect on timing belt, or other operatingparts.2.2 Remove any flash, sharp burrs, surface heat trea t scale and oxides byremoval and rounding of corners.3
4、. REQUIREMENTS3.1 SURFACE FINISH CONDITIONThe s urface finish rating in micrometers is to be specified on theen gineering drawing. The degree of surface finish is to becontrol led by the type of metal to be polished, effective spinvelocity, and finishing time cycle.3.2 APPEARANCEParts treated should
5、 have a uniform, homogeneous surface free of heattreat scale and oxides with no areas left unfinished and equivalentto the original approved samples.3.3 PROCEDUREThe process for slurry spin finishing with abras ive media shall be asfollows:Note: For product engineering approved material supplier sou
6、rce, forcompounds “A“, “C“, see Engineering Release.3.3.1 Degrease CleaningParts shall be free of any grease prior to polishing. Cleanwith M5B58 or equivalent.ENGINEERING MATERIAL SPECIFICATIONESE-M14P14-BWP 3948-b Page 2 of 4 3.3.2 Finishing MediaA Media BAbrasive WettingCompound Compound PartsConc
7、entration: %(By Volume) Note (1) Note (3) Note(4)Size: Dia. Range: 0.58-3.35 mm Nominal Note (2)Shape: Spherical SprocketNotes:(1) A we t slurry mix is maintained with excess waterheigh t sufficient to cover above the top of theabrasive level.(2) 97% of the abrasive particles fall within the rangeof
8、 0.58-3.35 mm. See Table 1, para 3.3.7.2.(3) Water solution with rust inhibitor and cleaningdetergent to maintain clean rust-free parts.(4) Par ts individually loaded on spindle or jigsuitable for treating all surfaces to be finished- polished.3.3.3 Polishing cycle: Load parts in slurry spin machine
9、 asfollows:. Materials: Finishing media and concentration per para3.3.2, Notes (1) and (2). Parts Load Size: See para 3.3.2, Note (4). Abrasive Depth and Part Coverage: Abrasive mix shall beof sufficient depth as to completely coat the part duringthe entire cycle without leaving uncleaned areas on t
10、hepart. Abrasive Mix Velocit y: 30 RPM minimum (at 1016 mm radiusmin).ENGINEERING MATERIAL SPECIFICATIONESE-M14P14-BWP 3948-b Page 3 of 4 . Part Velocity: 10 RPM min (1016 mm radius min oppositedirection to abrasive mix). Effective Cleaning Velocity: 40 RPM, or 287 m/min. Cycle time: 60 seconds, min
11、.3.3.3.1 Pol ishing cycle, velocity, and time requirementsfor other than values shown (for other parts) shallbe specified on the engineering drawing.3.3.4 RinseFinished parts are to be rinsed clean, free of all abrasiveparticles such that the y are free of abrasive dust when dry.Drain parts of all w
12、ater.3.3.5 Rust Preventive Treatment3.3.5.1 Corrosion Resistance 21 days min with(Humidity Test) 15% max rust(FLTM BJ 7-3)3.3.5.2 Rus t preventive material shall meet therequirements of ESA-M7C50-A or ESE-M7C71-A.Material: Compound “C“Application: Apply by dipping until parts aresaturated. Drain par
13、ts of excessliquid.3.3.6 Dry By suitable method such as by hotair blow off.3.3.7 Finishing Media MaintenanceThe a brasive media shall be maintained according to thefollowing:3.3.7.1 Maximum Loss of Media SizeWhen the original size of media A falls below theminimum shown, then replace the spent abras
14、ive tothe original level established per equipmentman ufacturer procedures by either adding newabrasive or replace the entire mix with new MediaA. Media “A“ Minimum screen size #30 - 0.58 mmopenings.ENGINEERING MATERIAL SPECIFICATIONESE-M14P14-BWP 3948-b Page 4 of 4 3.3.7.2 Abrasive SizeThe size of
15、abrasive Media allowable within th e mixis shown according to Table 1.Table 1 Abrasive Screen Size % Abrasive MediaMedia No. Opening, (mm) R etained on Screen“A“ 6 3.25 All pass20 6.84 85% min30 0.58 97% min3.4 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent i
16、nal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials abil
17、ity to meet the specificationrequir ements, the Supplier shall notify 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 sub
18、mitted with the request.Substance restrictions imposed by law, regulations 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
19、for the application.4. APPROVAL OF MATERIALSMat erials defined by this 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 Materi
20、als Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.
