毕业设计(论文)阀体零件机械加工工艺规程及夹具设计（Graduation design (thesis)mechanical processing procedure and fixture design for body parts）

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1、毕业设计(论文)阀体零件机械加工工艺规程及夹具设计（Graduation design (thesis) mechanical processing procedure and fixture design for body parts）Orders to recordPreface? 1The analysis of parts. 2The design of process procedure? 2Choose blank? 2Choose the base surface? 2Make the technical route? 34. Determination of the amoun

2、t of mechanical processing, the size of the process and the size of the blank. 4Determine the amount of cutting and the basic working hours. 6Three fixture design? 13Choose 1 positioning reference? 132. Calculation of axial force, cutting torque and clamping force? 13Location error analysis? 144. Br

3、ief description of fixture design and operation? 14References? 15 docin preface mechanical manufacturing technology foundation course design in the end of the locomotive mechanical manufacturing technology and the most professional class And the production practice of another practical teaching link

4、. This design enables us to take it togetherOr using the basic theory of mechanical manufacturing technology foundation and combining with production practice learned knowledge aloneSite analysis and solve the problem of the mechanical parts manufacturing process designed a special machine tool fixt

5、ure this typical processEquip increases the ability structural design for the graduation design in the future and the future work laid a goodThe foundation.Due to the limitation of ability inexperienced and there are many deficiencies in the design of hope everybody the teacher refers to moreTo teac

6、h. docin 1. Analysis of partsTechnical analysis of partsBased on the detail drawing of redraw accurately and completely know the view of the design dimensions, tolerances and skillThe skill is required. The parts need machining surface must be machining the surface machining accuracy and surface rou

7、ghnessRoughness is not difficult to obtain. Here is the cover need processing between machined surface and the surface of the position requirement1. Around end surface roughness is 25 hole phi 35 roughness of 12.5 the benchmark of the holes for the processing of other hole.Inner surface phi 35 rough

8、ness of 12.5 hole phi roughness for 20.2. 41 cylindrical surface roughness for 25 phi phi 50 cylindrical roughness of 12.5 phi 50 cylindrical right end surface roughness is 12.5 phi cylindrical 53 right face roughness of 25 phi 53 cylindrical roughness of 25 Phi cylindrical 53 left face roughness is

9、 253. The hole phi 14 h8 roughness of 12.5 According to the processing method of economic precision and the position of general machine tool can achieve accuracy not difficult to add the partsBore of the above technical requirements are using conventional processing technology can guarantee.2. Desig

10、n of process regulations1. Select blankThe parts material is cast steel structure is simpler parts in the product type to batch production has to make the partsGood mechanical properties guarantee parts reliable casting was presented in this paper.This can be guaranteed by increasing production effi

11、ciencyIt is also necessary to consider machining precision. Part shape is not complicated so blank shape parts similar to the shapeAs far as possible close to inner hole not cast out. The blank size can be determined after determining the allowance. The production of partsLed belong to mass producti

12、on. docin 2 choose base levelBase selection is one of the important tasks in process discipline. Base choose correctly and reasonable can makeTo improve work quality guaranteed productivity. Otherwise processing process will be patchy even more so still can cause parts of scrap make production cant

13、normal.The choice of crude benchmark according to the principle of selecting the benchmark namely when parts are not processed surface should be in the noAs if crude benchmark parts machined surface to several processing surface should not relative with machining surface requirementsHigh precision n

14、on-machining surface for rough reference. Now in parts of the cylindrical 35 as the main orientation crude benchmark.Fine benchmark choice consider to ensure the processing precision of parts and the clamping is accurate, convenient basis benchmarkPrinciple and the principle of unified benchmark cho

15、ose fine benchmark for cylinder 20 holes.3 process is obtainedPlan aProcess coarse milling outside the upper and lower end face.Process , rough hinge 35 of the holes.Process economic drill economic 35 inside surface.Process 20 holes.Process coarse car phi 41 cylindrical surface.Process coarse car, h

16、alf fine phi cylindrical 50 right face.Process coarse car, half fine 50 cylindrical phi.Process thick cylindrical car phi 53 next face.Process coarse car phi 53 cylindrical.Process thick cylindrical car phi 53 on the face.Process rough turning M36 external thread. docin process chamfering.Process XI

17、II drill, hinge, hinge phi 28.5 hole.Process XIV economic drill economic phi 28.5 hole right face.Process XV 4-14 holes.XVI cleaning.Procedure XVII: final inspection.Scheme 2Process 20 holes.Process coarse milling outside the upper and lower end face.Process , rough hinge 35 of the holes.Process eco

18、nomic drill economic 35 inside surface.Process coarse car phi 41 cylindrical surface.Process coarse car, half fine phi cylindrical 50 right face.Process coarse car, half fine 50 cylindrical phi.Process thick cylindrical car phi 53 next face.Process coarse car phi 53 cylindrical.Process thick cylindr

19、ical car phi 53 on the face.Process drill, hinge, hinge phi 28.5 hole.Process economic drill economic phi 28.5 hole right faceProcess XIII 4-14 holes.Process XIV rough turning M36 external thread. docin chamfering process XV car.XVI cleaning.Procedure XVII: final inspection.Plan a is phi 36 crude be

20、nchmark processing was carried out on the two end face first. In the process of finishing the two endsBenchmark hole phi 20. Without a fine reference positioning when drilling, coarse hinge holes 35 with 20 holesThere is an error in the axis.Other process arrangements are more reasonable and need no

21、t be changed. Scheme 2 first 35 as crude benchmark After processing 20 holes benchmark avoided using crude benchmark determine fine processing other process so as to improve the zeroThe machining accuracy of the piece. Two solutions compared to a more reasonable so options.4 machining allowance, the

22、 size of the process and the determination of blank dimensionsCover parts material for ZG230 production type using casting method casting MAO for mass productionBillet.According to the above raw materials and processing technology respectively determine the processing surface machining allowance, pr

23、ocessSize and the blank size as followsCheck the mechanical manufacturing process design manual hereinafter referred to as the process manual table 1 to 52The surface roughness of the dimension surface of the process procedureProcess coarse milling outside the upper and lower end face. 1 mm mm290. 0

24、390.048 umRa5.12Process , rough hinge 35 of the holes. 7.5 mm mm160. 0035 umRa5.12Process Process 20 holes. 10 mm 20 mm umRa25 docin process coarse car phi 41 cylindrical surface. 2 mm 41 mm umRa25Process coarse car, half fine phi cylindrical 50 under the face. 1 mm mm0 390.044 umRa5.12Process coars

25、e car, half fine 50 cylindrical phi. 2 mm phi 50 umRa25Process thick cylindrical car phi 53 next face. 1 mm mm0 480.039 umRa25Process thick cylindrical car phi 53 on the face. 1 mm mm0 480.038 umRa25Process coarse car phi 53 cylindrical. 0.5 mm phi 53 umRa25Process drill, hinge, hinge phi 28.5 hole.

26、 4.25 mm phi 28.5 umRa5.12Process economic drill economic - phi 28.5 hole end 5 um 1 mmRa5.12Process XIII 4-14 holes. 7 mm phi 14 umRa25Process XIV rough turning M36 external thread. 1 mm M36Chamfering process XV car. C1.5 umRa25The cover of the casting blank dimensions as shown in figure Table 1 ca

27、lculation table of machining allowanceProcessing dimensions and tolerancesprocessThe casting blank(20 mm hole The two end face mm290. 0390.048 Rough mill two endsProcessing before The biggest (51.3)Minimum 50 docin 5 determining cutting parameter and basic workProcess face rough milling around two l

28、evel.(1) the cutting speed tool is durable min60 v t pa = 10 mmpueyxpmV. v.pkZafatqdCV. v.vvV 0Check the process manual table 1-152 f = 0.2 0d = 20mmCheck the process manual table 4.2-8 vk = 0.96 check the process manual table 2-13 get the coefficient vC = 26 x = 0.1 y = 0.4 Z = 3 m = 0.2Vq = 0.25 v

29、p = 0.1 u = 0.15 ea = 1 pa = 4 0d = 20mmAvailable 96 V. 0312.046025.020261. 015.04.01.02.0 )min(7.81m) 36.1 (s.m(2) determine the spindle speed of machine tool(7.212014.336.110001000s.rdvnwS (3) cutting hours according to the process manual table 7-5After processing The biggest 51.3 48.29Minimum 50

30、47.61Machining allowance unilateral 1The biggest (2.3)A minimum of 0.71Machining tolerance unilateral + 0.70.3- 0.22/2 docin Cutting tool length.Try to cut out the mmlmmlmml0 cut length, 13621 fnThe name LLLts21 207.21.136)(53.8 s Process , rough hinge 35 of the holes.(1) the cutting speed tool is d

31、urable min60 t vyxpmzVitamin kfatdCV. v.vV 0According to pa = 7.5 mm f = 1.0 search vk = 0.93Check the process manual table 2-13 get the coefficient vC = 8 x = 0.2y = 0.3z = 0.6m = 0.25Available 93 V. 00.15.7603583. 02.025.006 )min(9.15m) 27.0 (s.m(2) determine the spindle speed of machine tool(46.2

32、3514.327.010001000s.rdvnwS (3) cutting hours according to the process manual table 7-5Cutter machining length mmLmml271 fnllts1 0146.2.27)(66.3 s docin process economic drill economic 35 inside surface.(1) the cutting speed tool durable min60 t vyxpmzVitamin kfatdCV. v.vV 0According to pa = 1mm f =

33、1.0 search vk = 0.93Check the process manual table 2-13 get the coefficient vC = 8 x = 0.2y = 0.3z = 0.6m = 0.25Available 93 V. 00.10.1603513. 02.025.006 )min(28.2m) 04.0 (s.m(2) determine the spindle speed of machine tool(36.03514.304.010001000s.rdvnwS (3) cutting hours according to the process man

34、ual table 7-5Cutter machining length mmLmml211 fnllts1 0136.0.21)(33.8 s process 20 holes.(1) the cutting speed tool is durable min60 v t pa = 10 mmyxpmzVitamin kfatdCV. v.vV 0Check the process manual table 1-161 for the hole to be drilled phi 20 to f = 0.65 docin and the process manual table 4.2-8

35、to vk = 0.94Check the process manual table 2-13 get the coefficient vC = 11.1 x = 0 y = 0.4z = 0.125Available 94 V. 065.060201.1140125.0.025 )min(7.15m) 26.0 (s.m(2) determine the spindle speed of machine tool(14.42014.326.010001000s.rdvnwS (3) cutting hours according to the process manual table 7-5

36、Cutting tool length.Try to cut out the mmlmmlmml2 cut length, 25021 fnThe name LLLts21 65014.4.2250 )(2.24 s Process coarse car phi 41 cylindrical surface.(1) cutting depth of unilateral residual can be removed at one time., 2 MMZ (2) supply rmmF4.0 according to the process manual table 3-13 (3) cal

37、culate the cutting speed according to the crafts handbook table 3-38 tool durability. tmin45 Chad coefficient of vC = 292 x = y = 0.3 0.15 m = 0.18 vyxpmVitamin kfatCV. v.V 81. 06007354.02452923. 015.018.0 docin ).min(170m) 8.2 (s.m(4) determine the spindle speed of machine tool(7.214114.38.21000100

38、0s.rdvnwS (5) cutting hours(5.1514.07.21214128321 sfnLLLLTs Process coarse car, half fine phi cylindrical 50 under the face.(1) the removal of the depth of the cutting depth can be removed at a time., 1 MMZ (2) supply rmmF4.0 according to the process manual table 3-13 (3) calculate the cutting speed

39、 according to the crafts handbook table 3-38 tool durability. tmin45 check coefficient of vC = 242 x = y = 0.35 m = 0.2 0.15vyxpmVitamin kfatCV. v.V 81. 04.014524235. 015.02.0 )min(2.126m) 1.2 (s.m(4) determine the spindle speed of machine tool(4.135014.31.210001000s.rdvnwS (5) cutting hours(3.304.0

40、4.1315.41571 sfnThe name llLTs docin process coarse car, half fine 50 cylindrical phi.According to table 1-143 technology handbook according to processing conditions for reference)(8.0rmmF ) (15.0)s.mV Determine spindle speed of machine tool(96.05014.315.010001000s.rdvnwS The cutting hours are 7 to

41、5 according to the process manualCut depth mmLmml5221 fn cut to lengthThe name LLLts21 8096.0.2557 )(3.83 s Process thick cylindrical car phi 53 next face.According to table 1-143 technology handbook according to processing conditions for reference)(8.0rmmF ) (15.0)s.mV Determine the spindle speed o

42、f machine tool(90.05314.315.010001000s.rdvnwS The cutting hours are 7 to 5 according to the process manualCut depth mmLmml5.1121 cut to length at docin fnllts21 8090.0.5.11)(5.3 s Process coarse car phi 53 cylindrical.According to table 1-143 technology handbook according to processing conditions fo

43、r reference)(8.0rmmF ) (3.0)s.mV Determine the spindle speed of machine tool(8.15314.33.010001000s.rdvnwS The cutting hours are 7 to 5 according to the process manualCut depth mmLmml5.0121 fn cut to lengthllts21 808.1.5.01)(05.1 s Process thick cylindrical milling phi 53 on the face.According to the

44、 process handbook of table 1-147-148, table 1 according to processing conditions for reference)(2.0rmmF ) (5.0)s.mV Determine spindle speed of machine tool: docin ) (96.72014.35.010001000s.rdvnwS The cutting hours are 7 to 5 according to the process manualCut depth mmLmml166121 fn cut to lengthllts2

45、1 2096.7.1661)(8.104 s Process drill, hinge, hinge phi 28.5 hole.According to table 1-163 technology handbook according to processing conditions for reference)(8.0rmmF ) (18.0)s.mV Determine the spindle speed of machine tool(29.22514.318.010001000s.rdvnwS The cutting hours are based on table 7-5 of

46、the process manual.5 l cut depth mmlmml805.121 fn cut to lengthThe name LLLts21 8029.2.805.15 )(2.47 s Process XIII 4-14 holes.According to table 1-163 technology handbook according to processing conditions to take reference docin ) (7.0)rmmF ) (55.1)s.mV Determine the spindle speed of machine tool(

47、14.61414.355.110001000s.rdvnwS The cutting hours are 7 to 5 according to the process manualCut depth mmLmml12721 fn cut to lengthThe name LLLts21 703.35.12744 )(7.9 s Three fixture designIn order to improve the labor productivity guarantee processing quality reduction of labor intensity need to desi

48、gn special fixture.After consultation with the instructor decided to design process rough milling two face under the outer side. This fixture will beSpecial machine tool supporting the use cylindrical milling cutter tool.The selection of positioning baseThe procedure selects mm20 cylindrical pin and

49、 a plane positioning a plane for the first must have a benchmark. Mm20 limits the workpiece positioning pin and the five degrees of freedom.2 cutting torque and axial force, the calculation of clamping force1 axial forceTool cylindrical milling cutter phi 25According to the process manual, table 3-3

50、6 docin vvvvqW.uxeyxpFdnzafaCF0 3-1 = 86. 086.072.02544008.01.3650 )(3.377 N 2 cutting torque is 3010 My MkfdCMM 3 to 2= 375.08.09.110)735600(4.02554).333 31086.048.038.151089 =)(34.62 mN 3 clamping forceAccording to the machine tool fixture design manual table 2-13 clamping force is221112)(LFLFKFlf

51、MW. 3-3 1925.0323.03.3773225.062340 (6.1) =)(25.6614 N3. Positioning error analysisThe workpiece end face for the first base on the short pin positioning as the first datum no benchmark displacement by mistakePoor is 0 position B and the second positioning base inner hole centerline will be because the end verticality erro