金属刀具课程设计说明书（Design instruction for metal cutting tools）

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1、金属刀具课程设计说明书（Design instruction for metal cutting tools）= page first =College of engineering and technologyCollege of engineering and technologyCollege of engineering and technologyCollege of engineering and technologycurriculum designcurriculum designcurriculum designcurriculum designcourseClasscour

2、seChengCheng ChengCheng:Principles and tools of metal cuttingPrinciples and tools of metal cuttingPrinciples and tools of metal cuttingPrinciples and tools of metal cuttingExpertfocus ones attention onExperttradecautiousIndustry:Mechanical engineering and automationMechanical engineering and automat

3、ionMechanical engineering and automationMechanical engineering and automationyearEvery yearyearlevelClassClass:learnLearnlearnNumberNo. No.Number：:surnameSurname surnamesurnamenameNameName:TutorTutorTutorTutor:dayEvery daydaystagestammeringPeriod:Two thousand and tenTwo thousand and tenTwo thousand

4、and ten2010Every year6 yearsSixty-sixJuneEvery monthmonthCollege of engineering and technology, Yunnan Agricultural UniversityCollege of engineering and technology, Yunnan Agricultural UniversityCollege of engineering and technology, Yunnan Agricultural UniversityCollege of engineering and technolog

5、y, Yunnan Agricultural University= page second =orderDipteraorderrecordRecordrecordOneone by oneA,Design requirementsdesign requirementdesign requirementdesign requirementAnd.And.And.And.ThreeThirty-threeThreeTwo22Two,Design stepsDesign stepsDesign stepsDesign stepsAnd.And.And.And.ThreeThirty-threeT

6、hree1.1.1.1.1.1.1.1., the blade clamping structureChoose the blade clamping structureChoose the blade clamping structureChoose the blade clamping structureAnd.And.And.As to.ThreeThirty-threeThree1.2.1.2.1.2.1.2. select blade materialSelect blade materialSelect blade materialSelect blade materialAnd.

7、And.And.As to.FourForty-fourFour1.3.1.3.1.3.1.3. choose the reasonable angle of toolSelect the reasonable angle of toolSelect the reasonable angle of toolSelect the reasonable angle of toolAnd.And.And.As to.FourForty-fourFour1.4.1.4.1.4.1.4. selects cutting parametersSelect cutting parametersSelect

8、cutting parametersSelect cutting parameters.Mistake! No bookmark defined.1.4.1.1.4.1.1.4.1.Selection of cutting parameters in 1.4.1. rough machiningSelection of cutting parameters in rough machiningSelection of cutting parameters in rough machiningSelection of cutting parameters in rough machining.M

9、istake! No bookmark defined.1.4.2.1.4.2.1.4.2.Selection of cutting parameters during finishing of 1.4.2.Selection of cutting parameters in finishingSelection of cutting parameters in finishingSelection of cutting parameters in finishing.Mistake! No bookmark defined.Three33Three,Draw the working draw

10、ing of turning toolDrawing work drawing of turning toolDrawing work drawing of turning toolDrawing work drawing of turning toolAnd.And.And.And.Mistake! No bookmark defined.Four44Four,Concluding remarksConcluding remarksConcluding remarksConcluding remarksAnd.And.And.Mistake! No bookmark defined.Five

11、55Five,ReferencesReferenceReferenceReferenceAnd.And.And.And.Mistake! No bookmark defined.= page third =Principles of metal cutting and course design of cutting toolsPrinciples of metal cutting and course design of cutting toolsPrinciples of metal cutting and course design of cutting toolsPrinciples

12、of metal cutting and course design of cutting tools(4)(4)(4)(4)design requirementdesign requirementdesign requirementdesign requirementOn the CY6140 lathe, process parts as shown below. The relative sizes of the parts are shown in Figure 1Piece material 45 steel, blank is Phi 25mm bar material. A la

13、the tool is required.Figure 1 part drawings of machined partsTwo22Two,Design stepsDesign stepsDesign stepsDesign steps1.1.1.1.1.1.1.1., the blade clamping structureChoose the blade clamping structureChoose the blade clamping structureChoose the blade clamping structureTaking into account the process

14、ing in the CA6140 general lathe, and belongs to continuous cutting, the use of welded structural vehiclesKnife. The welding method is brazing, and the tool groove of the lathe tool adopts an open groove, and the manufacturing structure is simple, and the welding surface is few,= page fourth =Small w

15、elding stress.1.2.1.2.1.2.1.2. electionChooseSelect blade materialBlade selection materialBlade selection materialBlade selection material(Carbide gradeCarbide gradeCarbide gradeCarbide grade)From the original given conditions: the workpiece material is 45 steel, continuous cutting finished rough ca

16、r, fine car twoProcess, in accordance with the principle of carbide selection, select blade material (carbide grade) for YT15, typeThe number is A1.According to the center height of the lathe, the section size of the cutter bar is B * H=16 * 25mm.1.3.1.3.1.3.1.3. choose the reasonable angle of toolS

17、elect the reasonable angle of toolSelect the reasonable angle of toolSelect the reasonable angle of tool(1Eleven1)Front angle selectionFront angle selectionFront angle selectionFront angle selection:The carbon content of 45 steel is 42%50%, which is medium hardness carbon steel. The front angle can

18、be obtained according to the textbook page 79, table 4-5The approximate value between 15 degrees 25 degrees, and take into account the fine machining when the front angle is larger, rough machining when the front angle is smaller,So, select the front angle as:ZeroGamma=20 degrees:(2Twenty-two2)Selec

19、tion of back angleSelection of back angleSelection of back angleSelection of back angle:The main consideration of the selection of the rear angle is that the friction between the back of the tool and the cutting surface is affected and the back angle is increasedThe gap between the new surface and t

20、he back of the tool can be enlarged to improve the surface quality of the new surface, howeverExcessive rear angle leads to poor heat dissipation condition, and the strength of cutting resistance decreases, thus affecting the service life of the toolSelect the rear corner of the tool. Considering th

21、e design of the excircle tool, we need to do rough machining and finish machining at the same timeOptional angle of 2 degrees 8 degrees, select the angle of the back angle forZeroAlpha=5 degrees.(3Thirty-three3)Selection of main deflection angleSelection of main deflection angleSelection of main def

22、lection angleSelection of main deflection angleBecause in the whole turning process, the lathe tool mainly turns the excircle, the end face and the chamfer, therefore selectsThe main deflection angle of K=45 degrees is appropriate(1Eleven1)Selection of auxiliary deflection angleSelection of auxiliar

23、y deflection angleSelection of auxiliary deflection angleSelection of auxiliary deflection angleThe secondary deflection angle is the main angle affecting the surface roughness, and the size of the tool affects the strength of the toolThe principle is that the minor deflection angle should be chosen

24、 here without affecting the friction and vibrationThe main design tools are cutting shaft parts, shaft parts of the rigidity is not too strong, so the contrastTextbook 81 pages, select range of 6 degrees 10 degrees, and finally select k =8 degrees.(5Fifty-five5)Selection of rake angleSelection of ra

25、ke angleSelection of rake angleSelection of rake angleThe cutting edge angle controls the direction of the cutting flow, and the rake angle can also increase the strength of the cutter head and improve the impact resistance of the bladePower。 The excircle tool designed here can be used in a rough an

26、d precise car, so choose lambda s=2 degrees.(6Sixty-six6)knifeknifeSelection of arc radius of tool noseSelection of sharp arc radiusSelection of sharp arc radiusSelection of sharp arc radius= page fifth =In semi finishing and finishing,REThe feed 23 is taken. Selected feed f=0.3mm, due tothisRE=0.9m

27、m.One point fourOne point fourOne point fourOne point fourSelection of cutting parametersSelection of cutting parametersSelection of cutting parametersSelection of cutting parameters(1Eleven1) choiceChoiceChoiceSelect engagementBy engagementBy engagementBy engagementPAlphaThe cutting depth of aPGene

28、rally according to the processing properties and processing allowance to determine. According to the machining allowance (phi 25 - Phi)(20=5mm) 2.5mm, leaving the finishing margin as much as possible, depending on the machine toolPerformance and workpiece processing allowance, select aP=2mm, leaving

29、 the finishing allowance for 0.5mm.(2Twenty-two2)Feed rateFeed rateFeed rateFeed rate fFFFThe selection of feed rate can be based on what is the choice of processing, roughing feed can be large, due toThe work-piece diameter is 25mm, depthPAlpha=2 the tool bar size is 16 * 25, so you can have the te

30、xtbook80 also table 4-8 finds the optimum range of feed 0.3-0.4, because it involves finishing, so the feed is selectedF=0.3mm.(3Thirty-three3)Cutting speedcutting speedcutting speedCutting speed vVVVCCCCChoiceChoiceChoiceChoiceBy formula:KFATCVTYXVVVPMVC=Calculate the cutting speed.In the ordinary

31、lathe for cutting, the tool shape is simple, easy sharpening, simple tool change, check textbooks59 page 3-3 table carbide tool life is set to T=60min, take the cutting correction factorZero.One=KTV.According to f=0.3mm/r, turning the outer circle, the workpiece material is 45 steel, check the teach

32、ing material P60 page, table 3-4 get,Two hundred and ninety-one=CVFifteen.Zero=XV,Two.Zero=YVM=2.Well:Zero point one fiveTwo hundred and ninety-one=147m/min* * * 1Six hundred and threeTwoVC= page sixth =According to the machine speed and other related parameters, select roughing machine speed of n=7

33、35r/min, butAt a cutting rate of:WC=1869r/minOne thousandNDV=PI(4) calculating cutting force:By teaching materialP46surface3-1According to the formula of cutting force:CFFFCCCCPYXnFFCavF=By teaching materialP46surface3-13777,0.15,0.9,1.0;CrCCRoCFKFFKnKK= = = =?Calculated:(5) calculate the required p

34、ower:965147/60Five point twoZero point seven fiveCMVKWFP*= = =realETAEdPPrealSo dosage can meet the requirementTwo22Two,Draw the working drawing of the lathe toolDraw the working drawing of the lathe toolDraw the working drawing of the lathe toolDraw the working drawing of the lathe tool= page seven

35、th =Main view and top view of lathe toolMain view and top view of lathe toolMain view and top view of lathe toolMain view and top view of lathe toolMarking of main angle of lathe toolMarking of main angle of lathe toolMarking of main angle of lathe toolMarking of main angle of lathe tool= page eight

36、h =Four44Four,Concluding remarksConcluding remarksConcluding remarksConcluding remarksThroughout the tool learning course, I learned the tools not only from books but also from teachersThe relevant knowledge, but also the teachers efforts to visit Kunming University of Science and Technology to stud

37、y, which makes me more in the toolThe reverse of knowledge is more firmly grasped. The course principles and tools of metal cutting has been completedAfter that, I completed the course design of the course, which I learned both in this course and in the courseSummary and use of knowledge is a practi

38、cal activity. Next, I will study the contents of this semester as follows:Throughout the semester, I learned all about the tool, including the angle and the cut of the toolCutting elements, cutting tools, cutting process, and the working principle and structure of various cutters,= page ninth =Throu

39、ghout the course of the study, through the teacher organized to study outside the school, I am not just from books and imaginationIn the process of cutting tools, more practical contact with a variety of tools, tool for the curriculum design laid the foundation.Cutting tools are the most important p

40、art of the machine industry. Each part and machine must be machined by the cutting toolIt is impossible to machine without cutting tools, so it is necessary to learn metal tools wellCondition.Five55Five,ReferencesReferenceReferenceReferenceCutting principles and tools of metal cutting tools, Lu Jianzhong, Sun Jianing