上锐紧固件生产工艺.ppt

LOGO,单击此处编辑母版文本样式,第二级,第三级,第四级,Page,*,单击此处编辑母版标题样式,紧固件制造,Surface Treatment,Heat Treatment,Thread Rolling,Cold Head/Hot Forging,Raw Material,Packing,Inspection,Fastener Manufacture Process,Without machining,Page,2,Raw Material,Page,3,Raw Material,Designated area for different types of steel,Page,4,Types of steel,indicated by colour,Raw Material,Page,5,Tags showing:,-The manufacturer,-The heat number,-The dimension,-The weight,-The Carbon content,Raw Material,Page,6,Wire Material,Control:,-Wire diameter,-General aspect,-Hardness,-Hardenability,-UTS,-Decarb,on,Raw Material,Page,7,Raw Material,Page,8,Phosphating bath,Raw Material,Baths control,Regular cleaning,Page,9,Phosphated wires,Page,10,Wire calibration,Raw Material,Page,11,Page,12,Cold Heading,/Hot Forging,Page,13,Hex Head Cap Screw Forging Sequence 4 Stn,CUT OFF STN,1ST STN,2ND STN,3RD STN,4TH STN,Cold Heading,Page,14,Page,15,Page,16,Cold Heading,Page,17,Page,18,Cold Heading,Page,19,Cold Heading,Page,20,In process control,Cold Heading,Page,21,Hot Forging,Page,22,Hot forging,Bars heating,Hot Forging,Page,23,Hot Forging,Over 25 mm Diameter,Page,24,Thread Rolling,Page,25,THREADS ROLLING,A PROCESS OF FORMING THREADS WITHOUT REMOVING THE MATERIAL,FLAT THREAD ROLLING,PLANETRYY THREAD ROLLING,CIRCULAR THREAD ROLLING,SEGMENTAL CIRCULAR THREAD ROLLING,Thread Rolling,Page,26,1 Flat rolling dies,2 Segmental rotary rolling dies,3 Two rolls one supporting ledge,4 Three rolls,Thread Rolling,Page,27,FLAT THREAD ROLLING,STATIONARY DIE,MOVING DIE,BEFORE,AFTER,For moderate production,CG 1,2,4(partly),5,9,10&11,12,90%products from catalogue,Thread Rolling,Page,28,Page,29,CIRCULAR THREAD ROLLING,CIRCULAR ROLLING DIE 2 NOS.,Low production rate,suitable for Odd head shape CG 4(e.g.BN 253,256,276,278,258&above M24&critical auto parts),Thread Rolling,Page,30,Thread rolling,after,heat treatment,Horizontal thread rolling is mainly used to form thread after heat,treatment,process is very precise but slow and not fit for large quantities,Thread Rolling,Page,31,Page,32,SEGMENTAL CIRCULAR THREAD ROLLING,CIRCULAR ROLLING DIE 2 NOS.,STATIONARY DIE,ROTATING DIE,3 TO 4 PIECES AT A TIME,For M/c screws,CG 5,Thread Rolling,Page,33,Planetary Thread rolling,Page,34,Thread rolling,Set up thread rolling:,5 samples are checked by QC,Page,35,In-process control,5 samples/15 mn(No record),Recorded values:every 1 hour(min-max),Page,36,Heat Treatment,Page,37,LPS,HEAT TREATMENT,A COMBINATION OF HEATING&COOLING OPERATIONS TO OBTAIN DESIRED PROPERTIES,HARDENING HEATING&QUENCHING,TEMPERING,Heat Treatment,Page,38,HEATING,HEATING THE MATERIAL ABOVE AUSTENISATION TEMPERATURE&SOAKING AS PER CROSS SECTION,QUENCHING,RAPID COOLING OF AUSTENISED MATL.,?,IMMERSING IN OIL OR WATER,MARTENSITIC TRANSFORMATION RESULTING INTO INTERNAL STRESSES,Heat Treatment,For 8.8 and above 820 to 900 Degree C,Page,39,LPS,TEMPERING,Heating Hardened material to specific temp.much below austenisation temp.for specific desired properties,?,Immediately after Quenching,REDUCES INTERNAL STRESSES&ALSO REDUCES HARDNESS,HEAT TREATMENT PROCESS FOR 8.8&ABOVE,45010 Degree C,Page,40,Fasteners of various grades made out of different steels,At room temp.the Material is in Pearlite(Lamellar)/Spherodised&ferrite form,Quenching,Fast Cooling,Hard Martensite(accicular)Structure,Brittle,not suitable for use,Tempering,Tempered Martensite Structure,product suitable for use,Furnace Having three zones,Controlled atmosphere of endo Gas available from gas generator,cracked gas(LPG:Air:1:10),Heating to austenising temp.of 820 to 900 degree C,temp.controllers provided,1,2,3,Austenitic Structure as a result of heating,HEAT TREATMENT PROCESS FLOW CHART,Page,41,CD John,谢谢观赏,谢谢观赏,Page,42,