机械5

Co
nte
nts Co
nte
nts 3 Abstract 4 Chapter 1 Part A
nalysis 5 1.1 Part role 5 1.2 Process A
nalysis of Parts 5 Chapter 2 Process Desig
n 6 2.1 Determi
natio
n of the ma
nufacturi
ng form of the bla
nk 6 2.2 Datum selectio
n 6 2.3 Formulati
ng the route 6 2.5 Determi
ne the cutti
ng amou
nt a
nd basic worki
ng hours 8 2.5.1 Thick a
nd fi
ne milli
ng fro
nt a
nd rear e
nd faces of φ250 8 2.5.2 coarse a
nd fi
ne bori
ng φ180H7 10 2.5.3 drilli
ng reami
ng φ25 12 2.5.4 Milli
ng groove 10mm 14 2.5.5 drilli
ng expa
nsio
n 6-φ13 14 Chapter 3 Fixture Desig
n 17 3.1 Proposal of the problem 17 3.2 Selectio
n of positio
ni
ng criteria 17 3.3 A
nalysis of positio
ni
ng error 18 Operatio
n List Sheet 22 Co
nclusio
n 24 Refere
nces 25 Tha
nks 26 Abstract The mecha
nical ma
nufacturi
ng process curriculum is desig
ned after completi
ng all the basic courses, professio
nal basic courses a
nd most of the mai
n courses of the u
niversity. This is a
n i
n-depth a
nd comprehe
nsive review of the courses that stude
nts have take
n before graduatio
n desig
n. It is also a theoretical a
nd practical trai
ni
ng. Therefore, the desig
n of mecha
nical ma
nufacturi
ng tech
nology courses is very importa
nt. I hope that I ca
n adapt the mecha
nical ma
nufacturi
ng process desig
n through this course desig
n, from which I ca
n get exercise, a
nd co
nsciously a
nalyze the problem a
nd solve the problem, a
nd lay a good fou
ndatio
n for future work. Due to limited capacity, there are ma
ny deficie
ncies i
n the desig
n process, so please ask the teachers to e
nlighte
n me. Key words: process pla
n
ni
ng, desig
n, special fixture Chapter 1 Part A
nalysis 1.1 Part role The beari
ng housi
ng parts are ge
nerally the compo
ne
nts that co
n
nect the beari
ngs. Of course, if there are co
n
necti
ng beari
ngs, there will be shaft holes, a
nd the ce
ntral shaft hole will have high precisio
n. The ce
nter hole is co
n
nected with the correspo
ndi
ng shaft a
nd beari
ng. The ce
nter hole of the beari
ng housi
ng this time. It is co
n
nected with the beari
ng o
n the correspo
ndi
ng shaft. The ce
nter hole of the beari
ng co
n
nectio
n
needs to have a certai
n surface precisio
n, a
nd the cyli
ndricity a
nd other geometrical tolera
nce requireme
nts must be e
nsured. Therefore, the beari
ng seat ca
n e
nsure the rotatio
n of the tra
nsmissio
n shaft smoothly. The role. 1.2 Process A
nalysis of Parts Some of the surfaces to be machi
ned i
n this housi
ng part mai
nly i
nclude a wide groove o
n the upper e
nd surface a
nd the upper e
nd surface, a wide groove o
n the lower right side e
nd surface a
nd the lower right side e
nd surface, a
nd a lower e
nd surface o
n the upper wide groove opposite side, The opposite e
nd faces of the wide groove o
n the right side, the fro
nt a
nd rear e
nd faces of φ250, etc., the surface rough
ness of the fro
nt a
nd rear e
nd faces of φ250 i
n these surface features is Ra6.3, a
nd the width of 50h11 of the two parts is also Ra6.3, a
nd the others are The specified surface rough
ness requireme
nts are Ra12.5, a
nd the surface rough
ness is
not i
ndicated. The characteristics of the hole i
nclude a large circular hole φ180H7 o
n the ce
nter refere
nce, the surface rough
ness of the hole is required to be Ra1.6, a
nd the surface rough
ness of the 2-φ25 hole o
n the upper wide groove a
nd the lower right wide groove is required to be Ra12.5, o
n the large e
nd face. The 6-φ13 through hole requireme
nt is also Ra12.5. The geometrical tolera
nce requires 0.12mm betwee
n the upper middle e
nd a
nd the lower right e
nd. The ce
nter large rou
nd hole φ180 requires a rou
nd
ness of 0.008mm, the large e
nd surface φ250 is the refere
nce B, a
nd the ce
nter large rou
nd hole φ180 is the refere
nce C. The two wide slots are relative to The B-refere
nce has a positio
nality of 0.4 mm, a
nd the fro
nt a
nd rear large e
nd faces have a verticality of 0.1 mm with respect to the C-refere
nce ce
nter.