TRUING DH SIS PHAM KY THU AT TPHCM
KHOA CG KHl CHE TAO MAY
BO MON HAN VA CONG NGHE KIM LOAI
DE THI CUOI HOC KY II NH 2019-2020
Mon: Cong nghe kim loai
Ma mon hoc: METE330126
De so/Ma de: 9A De thi co 20 cau, 6 trang (3 to).
Thai gian: 75 phut.
Khong diroc phep su dung tai lieu.
Sinh vien lam true tiep tren de thi va nop lai de thi
(khong tach roi cac to giay)
Chu ky giam thi 1
K? Chu ky giam thi 2
CB chain thi thir rihat CB cham thi thu hai
So cau dung: So cau dung:
Diem va chir ky Diem va chir ky Ho va te n :........................................................................
Ma so SV:
...............................................
So T T :
........................
Phong th i:..................................
CAU HOI
1. So sanh iru va nhiroc diem cua viec tao phoi bang phirong phap phirong phap gia
cong ap lye so voi viec tao phoi bang cac phirong phap Due. (0.5d)
Tao phoi bang iTu Nhiroc
phirong phap
Gia cong ap lire
so voi phnong
phap tao phoi
bang phirong
phap due
7
2. So sanh iru nhuoc diem va pham vi irng dung cua gia cong nong so voi gia cong
nguoi (0.5d)
_____
_____________________
________
_____________
________________
Phirong phap Uu Nhiroc Pham vi
Gia cong nong
Gia cong nguoi
3. Cac phirong phap dune sir dung d! tao phoi cho san xuat co khi
4. Can cir d l lira chon phoi (phirong phap tao p h o i) de gia cong co khi la gi?
/
5. Dau ngot bo tri o’:
a. O cho co thanh mong b. Cl vi tri giua cua long khuon
c. Ci vi tri cao nhat trong khuon d. Cung phia vdi he thong rot
6. Kich thude mau due bang
a. Kich thude ehi tiet may + lupng du gia cong + do co kim loai.
b. Kich thude vat due
c. Kich thude chi tiet may + do co kim loai + kich thude loi.
d. Kich thude chi tiet may + kich thude loi.
7. Kich thurdc vat due bang:
a. Kich thude chi tiet may + lupng du gia cong + do co kim loai.
b. Kich thude chi tiet may - lupng du gia cong - dung sai due - do co kim ldai.
c. Kich thude chi tiet may - lupng du gia cong + do co kim loai + kich thude loi.
d. Kich thude chi tiet may + lupng du gia cong + dung sai due.
*7 >
8. Khi chon chuan tho phai chu y hai yeu cau:
a. Phan phoi du lupng du cho cac be mat gia cong.
b. Bao dam do chinh xac can thiet ve vj tri tuong quan giua cac be mat khong gia cong
va cac be mat dupe gia cong
c. Ca 2 y tren deu dung
d. Ca 2 y tren deu sai
9. Lupng du gia cong phu thuoc vao
a. Kich thude chi tiet, phuong phap gia cong
b. Vi tri be mat chi tiet trong long khuon, phuong phap due
c. Kich thude chi tiet, phuong phap gia cong
d. Nhiet do chay cua kim loai,
10. Goi z la khe hd giua chay va coi, z phu thuoc vao? (0.25d)
11. Cho chi tiet sau tren khuon dap lien hop, biet vat lieu thep CT31, he so K = l.l
(0.5d)
a. Tinh luc dap
1
« r-3>
b. Trong nguyen cong tren san pham nao la dap cat,
san pham nao la dot 16.
12. Cho cac chi tilt nhu hinh ve hinh 1, lupng du gia cong mat tren 4mm, mqt dudi, mat ben
3mm. Dung sai due :±1.5, Goc thoat khuon 1°, Loai hinh san xudt: hang khdi. Ve ban ve
khuon Due cat cho chi tilt 1 (true tilp len ban ve cho sin), bilt vat lieu GX 15-32, (2d)
2/6
5* ^
\
13. Ve hinh dang MAU DUC BANG GO ngay tren ban ve chi tiet hinh 2 dirai day:
Cho biet san xuat hang loat. (0.5d)
Hinh 2: ban ve cho cau 13
14. Chi tiet Ul hinh 3 diro-c tao phoi b5ng phurong phap ren, b iit vat lieu thep C45. Yeu
cau (Id)
3/6
Hinh 3: Ban ve cau 14
a. Ve ban ve vat ren cho chi tiet hinh 3 biet liryng dir gia cong cho trircrc la 2
mm (ve tryc tiep tren hinh)
b. Gia sir ren ty do tir phoi ren hinh tru. Nguyen cong phu hyp de tao vat ren
nhir hinh la...................................................................................................................
15. Chi tiet blank holder trong khuon dap co vai tro gi? (0.5d)
Hinh 4: hinh ve cau 15
16. Neu cac vi tri han (ong co dinh) khi thyc hien moi han (han het chu vi ong) nhur
hinh ve (0.5d)
WELD
Nguon anh: upwweld.org
17. Khi han ho quang tay ngvoi thy phai thyc hien cac chuyen dong nao, cac chuyen
dong do co vai tro gi? (0.5d)
18. Ve so1 do cac phirong phap noi day khi han ho quang tay? Cac phirong phap noi
day do dtryc sfr dung khi nao? (0.5d)
4/6
19. Cho bieu <36 nhir hinh sau va co 2 phuong phap due: due khuon kim loai (die casting) va
due khuon cat (sand casting). Duong A, B bieu dien cho phuong phap nao? Giai thich y
nghTa bieu do tren. (0.5d)
A:...............................
.
.......................................................................................................
B:.......................................................................................................................................
Giai thich:........................................................................................................................
5/6