Tài liệu Elastomer - Bars - Seets - Sections doc

B PrecisionGroundPlatesandFlatBars C LiftingandClampingDevices D GuideElements E GroundPrecisionComponents F Springs G Elastomer-Bars,-Sheets,-Sections  FIBROFLEX®andFIBROELAST®-Sheetsand-Profiles H FIBROChemicalToolingAids J PeripheralEquipment K SlideUnits L StandardPartsforMouldMaking A DieSets 2·2331·7·1 ° Elastomer–Bars –Sheets –Sections subjecttoalterations G 3  FIBROFLEX ® FormingElastomers Theoccurenceofsmallbatchlotsinthe pressshopgenerallymakesthemore expensivediesofconventionaldesign unadvisable–anditisinthissectorin particularthatFIBROFLEX ® Forming Elastomerscanoffereconomical alternatives. Overmanyyearsinthepast,rubberwas usedformetalformingwork,mostlywith indifferentresultsbecauseofinsufficient mechanicalresilienceandsusceptibilityto damagebyworkshoplubricants. FIBROFLEX ® ,apolyurethaneelastomer ofveryspecialproperties,representsa syntheticmaterialofsignificantadvantages overallcoventionalrubbersubstances.It provides: •  highestresistancetorupturing •  outstandingelasticproperties •  extensivelifespanwhenusedcorrectly •  goodthermalresilience •  inertnesstoalllubricantsusedinmetal  formingoperations. Tothedesignerofforming-andshearing dies,FIBROFLEX ® offershighlyattractive solutionstomanyatoolingproblem–asfor instancethecompletioninoneoperationof intricatereturnflangesetc.Specialmention oughttobemadehereofthespecific suitabilitythiselastomerexhibitsinthe formingofdelicatesurface-coatedorsurface- refinedsheetmetal. Thequiteoutstandingelasticproperties ofFIBROFLEX ® havemadeitanalmost indispensablematerialintoolrooms everywhereandalsoinmanysectorsof generalengineering.Itsnumeroussuccessful usescomprisebumperstops,strippers, ejector-andformingpads,springelements aswellasnoisesupressionapplications. FIBROFLEX ® FormingElastomers,available inthreeShorehardnessestosuitdifferent conditions,aresuppliedinacomprehensive rangeofsectionshollowandsolid,alsoin sheetformofmanydimensions. Intendedassuggestionsforthesolutionof formingproblems,anumberofillustrated applicationexamplesarecontainedinthis catalogue.Furtherdetailledinformation onelastomertoolingcanbefoundinour freepublication“ElastomersinSheetMetal FormingandtheToolroom”,whichweshall gladlymailtointerestedcustomers. 2·2683·5 ° subjecttoalterations G 4 F I B R O F L E X * 2·9390·3·1 ° *Polyurethane accurate partsto customers specifi- cations subjecttoalterations G 5 2·2685·9·2 °  Contents Page   TechnicalData G 6 –G 7   onFIBROFLEX ®  251. FIBROFLEX ®  G 8   SheetsandPads  252. FIBROFLEX ®  G 8   SquareSections  250. FIBROFLEX ®  G 9   ChannelSections  255. FIBROFLEX ®  G 9   HollowSquareSections  253. FIBROFLEX ®  G 10   RoundSections  254. FIBROFLEX ®  G 10   HollowRoundSections  256. FIBROFLEX ®  G 11   EquilateralTriangle-   Sections  257. FIBROFLEX ®  G 11   EquilateralHollow   Triangle-Selections ExampleofFIBROFLEX ® Application:G 17–19 CombinationBlanking-,Embossingand FormingDie BlankingandformingwithG 21– 27 FIBROFLEX ® -Elastomers Appendix: ElastomereToolsforMetalForming andBlanking Page 2511.3. FIBROELAST ®  G 12   Sheets 2531.4. FIBROELAST ®  G 13   RoundSections 2541.4. FIBROELAST ®  G 13   HollowRoundSections 2450. ShockAbsorbing G 15   WashersFIBROFLEX ® subjecttoalterations G 6 2·2686·7·2 ° TechnicalDataonFIBROFLEX ® FormingElastomer PhysicalProperties: FIBROFLEX ® Type DIN 5 6 7 Shore-A-Hardness 53505 80 90 95 Densityg/cm 3  53479 1,07 1,11 1,13 max.deformationin%  35 30 25 ImpactresistancevalueN/cm(ASTMD470)  124 150 270 Elongationtotearin% 53504 490 430 380 TearingstrengthinN/mm 2  53504 34,4 38 44,8 Workingtemperature,max.°C  +70 +70 +70 Embrittlementtemperature°C  below–68 below–68 below–63 ModulusofelasticityN/mm 2   38 70 133 Electricpuncturestrength(permmthickness)   400Volt Reboundelasticity% 53512 58 42 40 At100 %elongationMPa 53504 5,5 5,6 12,4 At300 %elongationMPa 53504 10,3 15,2 29,6 CoefficientoffrictionofFIBROFLEX ®   dry0,35anyShorehardness   wet0,25anyShorehardness TensilestrengthMPa 53504 34 38 45 Elongation% 53504 490 430 380 TearstrengthkN/m 53515 36 42 58 Abrasionresistancemm 3  53516 48 32 41 Torsionalstiffnessat24°CinMPa  17,9 17,9 19,8 CompressiveSet 70h/22°Cin% 53517notavailablenotavailablenotavailable CompressiveSet 70h/22°Cin%–MethodeB– 53517 25 27 36 ResistancetoSeaWater(saline)approximately6months  Resistivity(directcurrent)at    24°C4,8310 11      70°C3,8310 10     100°C2,3310 10   Coefficientofexpansion  0upto–36°C=1,43 –4   0upto 24°C=1,01 –4  25upto100°C=0,95 –4  GuideLinesfortheMachiningofFIBROFLEX ® : FIBROFLEX ® FormingElastomerscanbemachinedonordinarymachinetoolsandwithconventionalcutters. Akeencuttingedgeismandatory. FIBROFLEX ® Type 5 6 7  IdentificationColour green yellow red  Shore-A-Hardness 80 90 95  Sawing  V c =approx.1600m/min. Circularsaw,carbide-tipped,coarsetoothed Rakeangle25°–30° Clearanceangle12°–15°  Drilling  V c =approx.30m/min.  Turning  V c =approx.140m/min. Rakeangle25° Clearanceangle12°–15°  Milling  V c =approx.100m/min. Rakeangle25° Clearanceangle12°–15°         Pleasenotethatwecansupplyformparts,requiredinlargerquantities,intheready-castcondition.Enquiriesareinvited.  V c =cuttingspeed  subjecttoalterations G 7 2·2687·2·1 °  TechnicalDataonFIBROFLEX ®  FormingElastomers TemperatureResistance FIBROFLEX ® canbeusedsafelyattemperaturesupto+70°C. FIBROFLEX ® willretainmostofitsflexibilityattemperaturesas lowas–62°C.Agradualincreaseinrigiditysetsinbelow–18°C. Resistancetothermalshockisexcellent. ResistancetoOxygenandOzone Notraceableinfluencesareincurredatnormalatmospheric concentrations. ResistancetoAging Agingshowsnodiscernableeffectsinconditionsofnormal ambienttemperaturesandgenerallyconstantenvironmental surroundings. TableNo1–ResistancetosomeChemicals DieselFuel v MineralFats,acc.toadditives +to– VegetabilicFats + AnimalFats + Petrol(freeofalcohols) v MineralOils–dependingonadditives + Paraffin +to– RapeSeedOil + LubrificantsonMineralOilBasis v SoapEmulsions – Vaseline + Waterat+95°C – Waterat+20°C +tov + resistant=canbeused v conditionallyresistant=conditionaluse – notresistant=notrecommended Pleasenotethatblendedoilsandfatsmayhavedetrimentalinfluence duetotheirvariousadditives.Inordertoeliminateanyrisk,itis recommendedottesttheelastomerunderexposuretoanyspecific oilyand/orfattysubstance.Suchtestsoughttoberunforseveral weeks. WaterResistance FIBROFLEX ® exhibitsoutstandinglong-termstabilityunder exposuretowaterofupto+50°C.Swellingand/ordestructive influencesremainabsent. Thistypicalresistanceagainsthydrolysisischaracteristicforthe specificmolecularstructureoftheelastomer. Water-Oilemulsionspresentnoproblemseither. TheseareclearadvantagesofFIBROFLEX ® overother polyurethaneelastomerstructures. Resistancetooil,chemicals,andsolvents FIBROFLEX ® ispresentinganexcellentresistancetooiland solventsandis,particularly,suitingapplicationsinconnection withlubricatingoilandfuel. Typicaldataofchemicalresistanceareshowninthefollowing table. subjecttoalterations G 8 OrderNo PartI PartII      PartIII    a3b a3b a3b a3b a3b   s 2503250 2503500 5003500 50031000 100031000 251.. .  1–7 • • • •    008.  8 • • • • •  010. 10 • • • • •  012. 12 • • • • •  015. 15 • • • • •  020. 20 • • • • •  025. 25 up to s = 80 mm  up to s = 80 mm  up to s = 80 mm  up to s = 80 mm  up to s = 50 mm  . 30–80       2·8843·9·3 ° 1 l b a b a s FIBROFLEX ® -SheetsandPads 251. FIBROFLEX ® -SquareSections 252. 251. 252.   l 1     l 1     l 1   250 500 1000  a3b 250 500 1000  a3b 250 500 1000 252. .008.008.h  • 252..020.020.h  • 252. .060.080. b b b  008.015.h  •  020.030.h  •  080.080. b b b  008.025.h  •  020.040.h  •  080.100. b b b  008.050.h  •  020.050.h  •  100.100. b b b  010.010.h  •  022.022. • • •  100.125. b b b  010.015.h  •  025.025.h  •  100.180. b b b  010.025.h  •  025.040.h  •  125.125. b b b  010.050.h  •  025.060.h  •  012.012.h  •  025.080.h  •  012.020.h  •  030.030. • • •  012.030.h  •  040.040.h  •  012.050.h  •  040.060. • • •  015.015. • • •  045.045. • • •  015.025.h  •  050.050. • • •  015.040.h  •  050.180. • • •  015.050.h  •  060.060. • • • 252. OrderNoa3b h=machineddimensionaledge 251. Execution: FIBROFLEX ® isavail.in3Shorehardnesses:  .5. = 80ShoreA=colour:Green  .6. = 90ShoreA=colour:Yellow  .7. = 95ShoreA=colour:Red Furthertechnicaldata:seepages G 6– G 7 OrderingCode(example): FIBROFLEX ® Sheet =251. Hardness95Shore-A =251.7. s=1mm =251.7.001. a3b=5003 500mm=251.7.001.0500.0500 OrderNo =251.7.001.0500.0500 Execution: FIBROFLEX ® isavailablein3Shorehardnesses: .5. = 80ShoreA=colour:Green .6. = 90ShoreA=colour:Yellow .7. = 95ShoreA=colour:Red Furthertechnicaldata:seepages G 6– G 7 increasingin stepsof1mm increasing insteps of10mm subjecttoalterations G 9  PartIII OrderNo PartI PartII       PartIII       OrderNo     l 1 PartI PartII a3b a 1 3b 1 d 1  250 500 1000 255. .040.060.  403 60 203 35  • • •  045.045.  453 45  20 • • •  050.050.  503 50  25 • • •  050.180.  503180 203120  • • •  060.060.  603 60  30 • • •  060.080.  603 80 303 50  • • •  080.080.  803 80  40 • • •  080.100.  803100 403 60  • • •  100.100. 1003100 503 50  • • •  100.125. 1003125 503 70  • • •  100.180. 1003180 503 123  • • •   125.125. 125 3125 753 75  • • •  255.      l 1 l 1   a3b a 1 3b 1  250 500 250. .050.050.  503 50  353 20 • •  050.075.  503 75  353 30 • •  075.100.  753100  503 40 • •  100.200. 1003200  603120 • •           250. 250. FIBROFLEX ® ChannelSections 255. FIBROFLEX ® HollowSquareSections Execution: FIBROFLEX ® isavail.in3Shorehardnesses:  .5. = 80ShoreA=colour:Green  .6. = 90ShoreA=colour:Yellow  .7. = 95ShoreA=colour:Red Furthertechnicaldata:seepagesG6–G7 OrderingCode(example): FIBROFLEX ® ChannelSection =250. Hardness90ShoreA =250.6. a3b=503 50mm =250.6.050.050. l 1 =250mm =250.6.050.050.0250 OrderNo =250.6.050.050.0250 Execution: FIBROFLEX ® isavail.in3Shorehardnesses:  .5. = 80ShoreA=colour:Green  .6. = 90ShoreA=colour:Yellow  .7. = 95ShoreA=colour:Red Furthertechnicaldata:seepages G 6– G 7 a 1 a b 1 b 1 l b 1 d a b 1 b 1 l 1 a a 1 l OrderingCode(example): FIBROFLEX ® HollowSquareSection=255. Hardness80ShoreA =255.5. a3b=503 50mm =255.5.050.050. l 1 =500mm =255.5.050.050.0500 OrderNo =255.5.050.050.0500 250. 255. 2·8844·9·2 ° subjecttoalterations G 10 253.  253. .002   2 •  003   3   •  004   4   •  005   5   •  006   6   •  007   7   •  008   8   •  010  10   •  012  12   •  016  16 •  020  20  •  025  25  •  032  32  •  040  40  •  050  50  •  063  63  •  080  80  •  100 100  •  125 125  •  140 140  •  150 150  •  160 160  •  180 180  •  200 200  •     PartIII OrderNo  l 1  PartI PartII d 1  330 500 1000 l 1 1 d 2 d l 1 1 d FIBROFLEX ® -RoundSections 253. FIBROFLEX ® -HollowRoundSections 254. Execution: FIBROFLEX ® isavail.in3Shorehardnesses:  .5. = 80ShoreA=colour:Green  .6. = 90ShoreA=colour:Yellow  .7. = 95ShoreA=colour:Red Furthertechnicaldata:seepages G 6– G 7 254.  254. .016  16  6,5 •  020  20  8,5  •  025  25 10,5  •  032  32 13,5  •  040  40 13,5  •  050  50 17,0  •  063  63 17,0  •  080  80 21,0  •  100 100 21,0  •  125 125 27,0  •  140 140 50,0  •  150 150 50,0  •  160 160 50,0  •  180 180 50,0  •  200 200 50,0  •               PartIII OrderNo   l 1 PartI PartII d 1 d 2  330 500 253. 254. OrderingCode(example): FIBROFLEX ® RoundSection = 253. Hardness95Shore-A = 253.7. d 1 = 40mm = 253.7.040 OrderNo = 253.7.040 OrderingCode(example): FIBROFLEX ® HollowRoundSection= 254. Hardness90Shore-A = 254.6. d 1 = 50mm = 254.6.050 OrderNo = 254.6.050 2·2448·9· 2 ° [...]... spring-back of the bend and the shallower is the required penetration of the punch 3 0-7 0 b Fig 6 Bending of Vee- and U-Shapes Displacement possible: a1 = 40–50% of a b1 = 50–60% of b Bending of Vee- and U-shapes can be achieved either with stacked FIBROFLEX® pads of different hardness (Fig 5), or with the aid of solid and hollow FIBROFLEX® Sections These may consist of squares, channels or triangular sections. .. an elastomer can be displaced but cannot be compressed Consequently it is of paramount importance to ensure that sufficient space is provided in an elastomer forming die for the accommodation of the displaced FIBROFLEX® subject to alterations G 17 Application Examples of Forming Operations ® with FIBROFLEX Elastomers Fig 5 Vee-Bending One of the easiest elastomer- forming operations is that of Vee-bending...256 257 FIBROFLEX® Triangular -Sections FIBROFLEX® Hollow Triangular -Sections 256. 257 l1 l1 d1 60° b 60° b 256 Order No Part I Part II 256 .035 050 080 b 35 50 80 l 1 250 • • • Part III l1 500 • • • Ordering Code (example): FIBROFLEX® Equilateral Triangle-Section Hardness 90 Shore-A size b = 35 mm l1 = 500 mm Order No 257 Order No Part I Part II... the press pressure first deforms the elastomer As soon as the elastomer reaches the limits of its deformation the workpiece is cut The less the stretch of the sheet metal, the easier it can be cut using the elastomer blanking process Spring band steels, electric sheets and sheet aluminium all cut well using this process Deep-drawing sheet steel is unsuitable for the elastomer blanking process The even... a1 = 50–60% of a b1 = 60–70% of b 30 subject to alterations b G 19 2· 2696·5  ° G 20 subject to alterations 2· 2697·2001·6  ° Blanking and forming with FIBROFLEX®-Elastomers subject to alterations G 21 Blanking and forming with FIBROFLEX®-Elastomers Description Choice of Machine FIBROFLEX forming materials for blanking, embossing and forming are eminently suitable for use in small and medium series... 4,6   26 550   46   45   58   40 2 ·12575 · 9·1  ° FIBROELAST® Sheet Hardness 65 Shore A s =   15 mm a = 250 mm b = 500 mm Order No subject to alterations 2531.4 2541.4 FIBROELAST®-Round Sections FIBROELAST®-Hollow Round Sections 2531.4. 2541.4 l1 l1 d1 d2 d1 2531.4 Order No Part I Part II 2531.4 016 020 025 032 040 050 063 080 100 125 2541.4 d 1   16   20   25   32   40   50   63   80 100... necessary penetration of the punch and the amount of over-bending depend on the thickness, hardness and type of the material – and furthermore on the bending radius, the length of the free legs on the piece part, and lastly on the Shore hardness of the cushion Especially with larger batch quantities it is advisable to ensure all-round retention of the stacked elastomer cushion; it also pays to make punch and... be required The “opposite member“ is provided by the elastomer cushion This means that elastomer dies are usually made very quickly and therefore cost less Moreover they afford great flexibility in regard of component modification at a later stage Whereas the foregoing considerations left the choice of an alternative solution, presswork with surface-coated or surfacerefined material usually does not:... sufficiently rigid 30 a a1 The hollow space of the channel-shaped cushion has the effect of increasing the horizontal pressure component in the die; this also holds true for hollow die cushions G 18 b 2· 2694·5  ° 30 subject to alterations Application Examples of Forming Operations with FIBROFLEX® Elastomers Fig 8 Fig 9 FIBROFLEX® Triangular Sections are shaped to fit into the existing forming grooves... FIBROFLEX®   Blanking Dies In the actual working cycle of en elastomer blanking die, the ram force is initially absorbed by the resistance of the deforming elastomer cushion As the limit of deformability is reached, shearing and stock breakaway must have taken place As a general rule it can be stated that stock of high ductility has a detrimental effect on elastomer blanking The brittler materials on the other . PrecisionGroundPlatesandFlat Bars C LiftingandClampingDevices D GuideElements E GroundPrecisionComponents F Springs G Elastomer- Bars, -Sheets, -Sections  FIBROFLEX®andFIBROELAST®-Sheetsand-Profiles. ApplicationExamplesofFormingOperations withFIBROFLEX ® Elastomers 2·2694·5 ° 30 a 1 a b3 0-7 0 Vee-Bending Oneoftheeasiest elastomer- formingoperationsisthatof Vee-bendingoffasolidpunchandintoadiecushionofstacked