机械5

Co
nte
nts co
nte
nt 1 Preface 2 1. A
nalysis 3 1.1 Part actio
n 3 1.2 Process a
nalysis of parts 3 第2章Process pla
n
ni
ng desig
n 4 2.1 Determi
ni
ng the ma
nufacturi
ng form of bla
nk 4 2.2 Datum pla
ne selectio
n 4 2.3 Worki
ng out the process route 4 2.4 Determi
natio
n of machi
ni
ng allowa
nce, process size a
nd bla
nk size 5 2.5 Determi
ni
ng cutti
ng parameters a
nd basic worki
ng hours 6 2.5.1 crude、Fi
nish milli
ngφ250 Fro
nt a
nd rear e
nd face 6 2.5.2 crude、Fi
ne bori
ng φ180H7 8 2.5.3Drilli
ng reami
ngφ25 10 2.5.4 Milli
ng slot 10mm 11 2.5.5 Drilli
ng a
nd expa
nsio
n 6-φ13 12 第3 Fixture desig
n for face milli
ng 14 3.1 Workpiece degree of freedom a
nalysis a
nd locatio
n pri
nciple 14 3.3 A
nalysis of positio
ni
ng error 15 3.4 Calculatio
n of cutti
ng force a
nd clampi
ng force 16 3.5 Brief descriptio
n of fixture desig
n a
nd operatio
n 18 Co
nclusio
n 19 Refere
nce 20 Preface The fixture of machi
ne tools is
now very widely used i
n the curre
nt metal cutti
ng process, it ca
n be said that basically all of the mecha
nical processi
ng will be more or less applied to fixture. The fixture is mai
nly able to accurately determi
ne the positio
n of the work piece, a
nd the work piece ca
n be firmly fixed a
nd clamped, so as to facilitate cutti
ng tools to meet the
needs of processi
ng. I
n other words, the mai
n fu
nctio
n of fixture is to e
nsure the quality of the work piece, improve the efficie
ncy of processi
ng, reduce the i
nte
nsity of labor, ca
n give full play to the performa
nce of machi
ne tools, so fixture i
n the curre
nt machi
nery ma
nufacturi
ng occupies a very importa
nt positio
n With the great developme
nt of mechatro
nics, automatio
n a
nd artificial i
ntellige
nce, the fixture used i
n the field of machi
nery has gradually evolved i
nto a variety of forms, from the former ma
nual fixture to the automatic assembly li
ne fixture, a
nd eve
n to the prese
nt i
ntellige
nt automatic fixture, the applicatio
n of fixture is more a
nd more people. With the developme
nt of i
ndustry, fixture will be improved a
nd developed co
nti
nuously to meet the
needs of moder
n a
nd diversified mecha
nical ma
nufacturi
ng productio
n From the actual developme
nt of machi
nery to the prese
nt, we lear
n the desig
n of fixtures a
nd mecha
nical ma
nufacturi
ng process k
nowledge, so that a good combi
natio
n of the curre
nt mecha
nical ma
nufacturi
ng productio
n, has a good lear
ni
ng effect, a
nd ca
n lay a certai
n fou
ndatio
n i
n the future developme
nt of mecha
nical ma
nufacturi
ng work, so familiar with the machi
ne Machi
nery ma
nufacturi
ng tech
nology a
nd tooli
ng a
nd fixture desig
n k
nowledge, for the future of mecha
nical ma
nufacturi
ng work has a great help, but also make their ow
n step by step, gradually upgrade, for the motherla
nd's mecha
nical ma
nufacturi
ng i
ndustry to co
ntribute. 第1章Part a
nalysis 1.1 Part actio
n This part is a beari
ng seat, beari
ng seat is ge
nerally i
nstalled o
n a machi
ne tool, the beari
ng seat a
nd the correspo
ndi
ng co
n
necti
ng holes co
n
nected with the correspo
ndi
ng co
n
necti
ng screw or co
n
necti
ng shaft, the ce
nter hole a
nd the correspo
ndi
ng shaft beari
ng with each other, with the rotatio
n of the shaft, to e
nsure that the ce
nter hole a
nd the shaft have a certai
n co
nce
ntric effect. 1.2 Process a
nalysis of parts Some surfaces to be machi
ned i
n this beari
ng seat part mai
nly i
nclude wide grooves o
n the upper e
nd face a
nd upper e
nd face, wide grooves o
n the lower right e
nd face a
nd the lower right e
nd face, opposite lower e
nd face of wide grooves o
n the upper side, opposite e
nd face of wide grooves o
n the right side, fro
nt a
nd rear e
nd face of 250, a
nd so o
n. The fro
nt a
nd rear e
nd face of 250 is thick i
n these surface features. The rough
ness requireme
nt is Ra6.3, a
nd the width slot 50h11 requireme
nt of the two parts is also Ra6.3. I
n additio
n, the surface rough
ness requireme
nt of the other two parts is Ra12.5, a
nd the surface rough
ness u
nmarked is
not processed. The characteristics of the misalig
nme
nt hole i
nclude the large circular hole_180H7 o
n the ce
nter datum, the surface rough
ness requireme
nt of this hole is Ra1.6, the surface rough
ness requireme
nt of 2-_25 holes o
n the upper wide groove a
nd the lower right wide groove is Ra12.5, a
nd the requireme
nt of 6-_13 through holes o
n the large e
nd face is Ra12.5.