专业夹具设计全英文介绍.ppt

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1、专业夹具设计全英文介绍思诚机电第一页，编辑于星期六：十四点 三十三分。2Good Fixture DesignGood fixtures position,clamp and support workpieces in the most effective way possible第二页，编辑于星期六：十四点 三十三分。3Fixture design,workpiece Example 1第三页，编辑于星期六：十四点 三十三分。4Fixture design,process第四页，编辑于星期六：十四点 三十三分。5DatumFixture design,workpiece datums第五页，

2、编辑于星期六：十四点 三十三分。6Fixture design,supporting第六页，编辑于星期六：十四点 三十三分。7Fixture design,positioning第七页，编辑于星期六：十四点 三十三分。8Fixture design,clamping第八页，编辑于星期六：十四点 三十三分。9Fixture design,additional support and clamping第九页，编辑于星期六：十四点 三十三分。10Fixture,positioning,supporting and clamping第十页，编辑于星期六：十四点 三十三分。11Fixture desig

3、n,workpiece,Example 2第十一页，编辑于星期六：十四点 三十三分。12Fixture design,process第十二页，编辑于星期六：十四点 三十三分。13Fixture design,supporting第十三页，编辑于星期六：十四点 三十三分。14Fixture design,clampingXX第十四页，编辑于星期六：十四点 三十三分。15Fixture design,clampingDatum第十五页，编辑于星期六：十四点 三十三分。16Fixture design,positioning and clamping第十六页，编辑于星期六：十四点 三十三分。17Fi

4、xture design,positioning,supporting&clamping第十七页，编辑于星期六：十四点 三十三分。18Friction clampingIf clamping using friction only it must be remembered that the coefficient of friction()is normally calculated at 0.1Clamping force FReaction forceTotal clamping force=F x Clamping force FReaction forceTotal clamping

5、 force=FClamping force F 2-30 from horizontalPreferable第十八页，编辑于星期六：十四点 三十三分。19Friction clampingIf clamping using friction only it must be remembered that the coefficient of friction()is normally calculated at 0.1This can be improved on soft materials(eg.Al)if the clamping piston has enough force to

6、penetrate the workpiece第十九页，编辑于星期六：十四点 三十三分。20Fixture designDEFINITION OF A CLAMPING FORCEThe force acting on a workpiece to be clamped,is large enough to hold the workpiece firmly in its given position relative to the cutting tool,against the action of the machining forces第二十页，编辑于星期六：十四点 三十三分。21Fix

7、ture designCLAMPING FORCESnMechanicalnlow cost,relatively low forcesnPneumaticnhigher cost,relatively low forces,large componentsnHydraulicnhigher initial cost,high forces,reliable,small components 第二十一页，编辑于星期六：十四点 三十三分。22Mechanical ForcesMaximum clamping forceusing standard wrenchClamping force(kN)

8、Clamping force with extension piecesas shown,500N torque,=0.1第二十二页，编辑于星期六：十四点 三十三分。23Standard clamping strapM20 threadMax.recommended torque 223NmMax.clamping force 28kN Hydraulic swing clamp 6951F-11-21(page 63,metric catalogue)22 rod,76mm long armMax.oil pressure 23 MPaClamping force 7.3kN Force c

9、omparison第二十三页，编辑于星期六：十四点 三十三分。24Force comparisonStandard clamping strapM20 threadMax.recommended torque 223NmMax.clamping force 28kN Hydraulic swing clamp 6951F-11-21(page 63,metric catalogue)22 rod,clamping strapMax.oil pressure 35 MPaClamping force 13.7kN 第二十四页，编辑于星期六：十四点 三十三分。25Standard clamping

10、 strapM24 threadMax.recommended torque 383NmMax.clamping force 40kN Hydraulic swing clamp 6951FN-33-21(page 71,metric catalogue)38 rod,clamping strapMax.oil pressure 35 MPaClamping force 35kN Force comparison第二十五页，编辑于星期六：十四点 三十三分。26Standard clamping strapM24 threadMax.recommended torque 383NmMax.cla

11、mping force 40kN Hollow piston cylinder 6921-100 x10(page 26,metric catalogue)M24 threadMax.oil pressure 400 barClamping force 101kN Force comparison第二十六页，编辑于星期六：十四点 三十三分。27Mechanical or Hydraulic?第二十七页，编辑于星期六：十四点 三十三分。28Mechanical or Hydraulic?50 MPaSequence Valve 47-0440-02(J-3)Set at 30 MPaCartri

12、dge Mount Cylinder(x8)42-1010-04(page F-12)2.5 kN each 50MPaThreaded Cylinder42-0010-06(page F-4)3.4 kN 30 MPa5.7 kN 50 MPa第二十八页，编辑于星期六：十四点 三十三分。29Force diagram30 MPa50 MPaSequence valve opensWorkpiecesMovement of cylinderOil pressure第二十九页，编辑于星期六：十四点 三十三分。30Component&Fixture designSENSIBLE USE OF FO

13、RCESensible introduction of positioning,clamping and supporting forces will enhance the quality of a workpiece第三十页，编辑于星期六：十四点 三十三分。31Oil supply to fixturesn2 basic methodsnthrough pipesnthrough gun drilled channelsnMethod depends onncost targetncomplexity of fixturenproducts being used第三十一页，编辑于星期六：十

14、四点 三十三分。32Oil supply to fixtures,cost comparisonnA:Through pipes using flange type clampsnB:Through pipes using threaded type clampsnC:Through gun drilled channels&manifold mounted type clampsnD:Through gun drilled channels&threaded body type clamps第三十二页，编辑于星期六：十四点 三十三分。33Oil supply to fixtures,cost

15、 comparisonA:Through pipes usingflange type clampsnRelatively easy to manufacturenFittings weakest part of systemnChip trapsControl fixtureCOST 100%第三十三页，编辑于星期六：十四点 三十三分。34Oil supply to fixtures,cost comparisonB:Through pipes usingthreaded type clampsnLess swarf traps nReduces machining areanFitting

16、s weakest part of systemCOST?%against control fixture第三十四页，编辑于星期六：十四点 三十三分。35Oil supply to fixtures,cost comparisonC:Through gun drilled channels&manifold mounted type clampsnMaximum component density nMinimum swarf trapsCOST?%against control fixture第三十五页，编辑于星期六：十四点 三十三分。36Oil supply to fixtures,cos

17、t comparisonD:Through gun drilled channels&threaded body type clampsnMaximum component density nMinimum swarf trapsCOST?%against control fixture第三十六页，编辑于星期六：十四点 三十三分。37Oil supply to fixtures,cost comparisonC:Through gun drilled channels&manifold mounted type clamps98%B:130%D:104%A:100%第三十七页，编辑于星期六：十

18、四点 三十三分。Hydraulic circuit design第三十八页，编辑于星期六：十四点 三十三分。39Circuit design第三十九页，编辑于星期六：十四点 三十三分。40Cam Cover fixture example第四十页，编辑于星期六：十四点 三十三分。41Circuit design第四十一页，编辑于星期六：十四点 三十三分。42第四十二页，编辑于星期六：十四点 三十三分。http:/www.ec- fixture example第四十三页，编辑于星期六：十四点 三十三分。44Circuit design第四十四页，编辑于星期六：十四点 三十三分。45第四十五页，编

19、辑于星期六：十四点 三十三分。Getting the oil to the fixture第四十六页，编辑于星期六：十四点 三十三分。47Rotary&Rotary Valve Couplings第四十七页，编辑于星期六：十四点 三十三分。48Rotary CouplingsnUsed when free passage of oil is required to be distributed on rotary table arrangementsnStandard versions of single,twin,four and six passages with/without leak

20、age portnMaximum operating pressure 250/500 barnWhen specifying include data on rotation speed,pressure,temperature,media and cycle timenSpecial designs available on request第四十八页，编辑于星期六：十四点 三十三分。49Twin passage rotary couplingnUse on rotary table with two single acting cylinders第四十九页，编辑于星期六：十四点 三十三分。

21、50Four passage rotary couplingnUse on rotary table with 4 single acting or 2 double acting cylinders第五十页，编辑于星期六：十四点 三十三分。51Six passage rotary couplingnUse on rotary tables with combination of up to 6 oil feeds ie.6 s/a,3 d/a,2 d/a&2 s/a cylinders第五十一页，编辑于星期六：十四点 三十三分。52Rotary Coupling circuitSingle

22、acting circuitDouble acting circuit第五十二页，编辑于星期六：十四点 三十三分。53Application example第五十三页，编辑于星期六：十四点 三十三分。54Rotary Valve CouplingsnUsed on rotary table arrangements when loading/unloading of stations is required whilst maintaining clamping pressure on remaining stationsnVersions include 5,6,7,8,9&10 stati

23、ons.nApplications requiring 2,3 or 4 stations use 6&8 stations with unused ports plugged.nSpecial designs availablenUp to 200 bar an accumulator is recommended,above 200 bar it is essential due to internal leakage within the oil return cavity of the unit第五十四页，编辑于星期六：十四点 三十三分。55Rotary valve coupling

24、functionLoad stationUnload stationRotary couplingWork stationClamping cylinder第五十五页，编辑于星期六：十四点 三十三分。56Rotary Valve Coupling circuitSingleactingDoubleacting第五十六页，编辑于星期六：十四点 三十三分。57Application example第五十七页，编辑于星期六：十四点 三十三分。58Coupling unitsnQuick disconnect couplingsnOne-hand operation quick disconnectn

25、Coupling unitsnAutomatic coupling systemsnThreaded coupling elements 第五十八页，编辑于星期六：十四点 三十三分。59Quick DisconnectCouplingsnMax operating pressure 500 barnOne hand operationnAlways use dustcapsCoupling units第五十九页，编辑于星期六：十四点 三十三分。60Coupling UnitsnSingle or double actingnIntegral accumulator and pressure g

26、augenMulti-coupler units availableCoupling units&accumulators第六十页，编辑于星期六：十四点 三十三分。61Coupling SystemsnAlways use accumulators on static systemsn10 temperature difference relates to 10 bar pressure differenceCoupling units&accumulators第六十一页，编辑于星期六：十四点 三十三分。62Threaded coupling elements第六十二页，编辑于星期六：十四点

27、三十三分。Breathing第六十三页，编辑于星期六：十四点 三十三分。64What is breathing?Breathing is the action of single acting cylinders during the spring return part of the component cycle第六十四页，编辑于星期六：十四点 三十三分。65Why breathing has to be madenExcess pressure or vacuum in the spring area changes the spring forces which leads to ma

28、lfunctionnFormation of condensation water promotes rust formation and can lead to a complete failure of the elementsnLeakage of hydraulic seals must drain off to exterior without pressure otherwise there will be malfunctionsnDust and chips are retained by sintered metal air filtersnLiquids can be dr

29、awn through the sintered metal filter,thus the breathing spring area is reduced,a higher excess pressure or vacuum is caused and the function is impaired第六十五页，编辑于星期六：十四点 三十三分。66What is breathing?What happens during breathing第六十六页，编辑于星期六：十四点 三十三分。67PrecautionsCovernClamping elements without breather

30、ports can be covered.nDue to high coolant pressure and flow this is not always successfulnConsider using double acting elements wherever possible第六十七页，编辑于星期六：十四点 三十三分。68PrecautionsBreather hosenConnection of a breather hose is approved if the outlet is sited at a point where no liquid can penetraten

31、Ensure no fluid traps in hose第六十八页，编辑于星期六：十四点 三十三分。69PrecautionsClosed breather systemnSpring area is increased by connection of additional closed area.nElectrical die cast boxes are idealnVolume of additional area should be 10 times the stroke volume of all connected components第六十九页，编辑于星期六：十四点 三十三分

32、。70System bleedingThe system must always be free from air第七十页，编辑于星期六：十四点 三十三分。71Component DesignnComponents can be of fixed design第七十一页，编辑于星期六：十四点 三十三分。72Component DesignnClamping points can be incorporated into design of component第七十二页，编辑于星期六：十四点 三十三分。73Designed for Clamping第七十三页，编辑于星期六：十四点 三十三分。74

33、Designed for Clamping第七十四页，编辑于星期六：十四点 三十三分。75Inaccessible clamping positions第七十五页，编辑于星期六：十四点 三十三分。76Indirect Clamping第七十六页，编辑于星期六：十四点 三十三分。77Fixture DesignnStatic fixturenTombstonenHorizontal machining第七十七页，编辑于星期六：十四点 三十三分。78Fixture Design第七十八页，编辑于星期六：十四点 三十三分。79Fixture Design第七十九页，编辑于星期六：十四点 三十三分。8

34、0RemembernFIXTURE DESIGNnGood fixtures position,clamp and support components in the most effective way possiblenDEFINITION OF A CLAMPING FORCEThe force acting on a workpiece to be clamped,is large enough to hold the workpiece firmly in its given position relative to the cutting tool,against the action of the machining forcesnSENSIBLE USE OF FORCESensible introduction of positioning,clamping and supporting forces will enhance the quality of a workpiece第八十页，编辑于星期六：十四点 三十三分。81Vektek China Rep.O第八十一页，编辑于星期六：十四点 三十三分。