机械5

Co
nte
nts Abstract 3 Chapter 1 Preface 4 Chapter 2 Process a
nalysis of workpiece 4 2.1 Fu
nctio
n of workpiece 4 2.2 Process a
nalysis of parts 5 Chapter 3 Bla
nk part determi
natio
n 6 Chapter 4 Ma
nufacturi
ng process pla
n
ni
ng 7 4.1 Selectio
n of positio
ni
ng refere
nce 7 4.2 Maki
ng process route 7 Chapter 5 Cutti
ng parameters a
nd labor-hour 10 5.1 Determi
natio
n cutti
ng parameters a
nd Time quota calculatio
n 10 Chapter 6 Jig/Fixture desig
n 13 6.1 Desig
n duty 13 6.2 Locati
ng datum 13 6.3 Fixture Degree of freedom a
nalysis 14 Chapter 7 Fixture desig
n a
nd usage of equipme
nt 15 7.1 Fixture desig
n 15 7.1.1 locati
ng a
nd clampi
ng of the workpiece 15 7.1.2 A
nalysis of locatio
n errors 16 7.2 Calculatio
n of cutti
ng force a
nd clampi
ng force 17 7.2.1 Calculatio
n of cutti
ng force 17 7.2.2 Calculatio
n of clampi
ng force 18 7.3 Brief descriptio
n of fixture desig
n a
nd operatio
n 19 Chapter 8 Co
nclusio
n 21 Refere
nces 22 Tha
nks 22 Abstract The desig
n course is a teachi
ng li
nk o
n the basis of fi
nishi
ng the course Tech
nology of Mecha
nical Ma
nufacture (i
ncludi
ng machi
ne tool fixture desig
n)a
nd most of the specialized courses. It is a desig
n of special fixture mai
nly for the processi
ng tech
nic of parts a
nd some procedure processi
ng of parts. From the process of the parts, it mai
nly a
nalyses what problems should pay atte
ntio
n i
n the processi
ng, a
nd what methods a
nd process should be adopted to e
nsure the accuracy a
nd raise labor productivity. As far as special clamp is co
ncer
ned, good fixture desig
n ca
n improve product productivity, accuracy, reduce costs a
nd so o
n, a
nd ca
n also expa
nd the scope of use of machi
ne tools, so that improve the productio
n efficie
ncy a
nd reduce the costs u
nder the premise of e
nsuri
ng accuracy. This desig
n e
nables us to apply the basic theory of ma
nufacturi
ng tech
nology, combi
ni
ng with practical k
nowledge gai
ned from productio
n practice, a
nd a
nalyze a
nd solve process problems i
ndepe
nde
ntly. Besides, it e
nables us to master the ability to desig
n a process specificatio
n for a moderately complex part (shell) a
nd the k
nowledge of the basic pri
nciples a
nd methods of fixture desig
n. This desig
n is also a practice shot of drawi
ng up jig desig
n pla
n, completi
ng jig structure desig
n ability, bei
ng familiar with a
nd usi
ng releva
nt ma
nuals, charts a
nd other tech
nical data a
nd writi
ng tech
nical docume
nts a
nd other basic skills, which lays a good fou
ndatio
n for future graduate desig
n a
nd future work. Due to limited capacity, lack of experie
nce, there are ma
ny i
nadequacies i
n the desig
n, I hope the teacher will be more advice. Key words: process pla
n
ni
ng, desig
n, special fixture Chapter 1 Preface I
n rece
nt years, with the rapid developme
nt of machi
nery ma
nufacturi
ng i
ndustry, ma
nufacturi
ng tech
nology i
n processi
ng is also developi
ng co
nti
nuously, a
nd the applicatio
n of various machi
ne tools is becomi
ng more a
nd more exte
nsive, a
nd various parts are also i
ncreasi
ngly dema
ndi
ng. This desig
n carries o
n the tech
nological a
nalysis to its fork parts, a
nd formulates the reaso
nable processi
ng procedure for this part is a
n effective measure to guara
ntee the processi
ng quality of the parts. Accordi
ng to this topic, the basic desig
n co
nte
nts i
nclude: 1. Accordi
ng to the "beari
ng seat" part drawi
ng, process a
nalysis is carried out, a
nd the tech
nical requireme
nts of each surface of the part are a
nalyzed. 2. Accordi
ng to eleme
nt formulate the mecha
nical process. 3. Draw up the fixture assembly drawi
ng of the special process. 4. Write desig
n i
nstructio
ns. Chapter 2 Process a
nalysis of workpiece 2.1 Fu
nctio
n of workpiece This time, the part is the beari
ng seat. The beari
ng seat is usually i
nstalled o
n a machi
ne tool. The correspo
ndi
ng co
n
necti
ng hole of the beari
ng seat relates to the correspo
ndi
ng co
n
necti
ng screw or the co
n
necti
ng shaft. The ce
ntral hole a
nd the correspo
ndi
ng beari
ng o
n the shaft cooperate with each other. With the rotatio
n of the shaft, it is
necessary to e
nsure that the ce
ntral hole a
nd the shaft have a certai
n co
nce
ntric effect. 2.2 Process a
nalysis of parts Some surfaces to be machi
ned i
n this beari
ng seat parts mai
nly i
nclude the wide grooves o
n the upper e
nd face a
nd the upper e
nd face, the wide grooves o
n the right lower e
nd face a
nd the right lower e
nd face, the opposite lower e
nd face of the upper wide groove, the opposite e
nd face of the right wide groove, a
nd the fro
nt a
nd rear e
nd face of the φ250. The surface features of the fro
nt a
nd back face of the φ250 are thick. The rough
ness requireme
nt is Ra6.3, a
nd the wide groove 50h11 requireme
nt of the two parts is Ra6.3. I
n additio
n, the other specified surface rough
ness requireme
nts are Ra12.5, a
nd the u
nspecified surface rough
ness requireme
nts are all
no
n-processed. The characteristics of the hole i
nclude the large circular hole φ180H7 o
n the ce
nter datum. The surface rough
ness requireme
nt of the hole is Ra1.6, the surface rough
ness requireme
nt of the 2-φ25 hole o
n the upper wide groove a
nd the right lower wide groove is Ra12.5, a
nd the through hole requireme
nt of the 6-φ13 hole o
n the large e
nd face is Ra12.5. I
n the form tolera
nce requireme
nts, the verticality betwee
n the upper e
nd face a
nd the lower right e
nd face is 0.12 mm, ce
nter large circle hole φ180 degrees rou
nd
ness requireme
nt 0.008mm, Large e
nd faceφ250 is the base B. Ce
nter large circular hole φ180 is the base C. Two wide grooves have positio
nal 0.4mm requireme
nts relative to the B datum. The fro
nt a
nd rear faces have the requireme
nt of perpe
ndicularity 0.1mm relative to the C datum ce
nter.