TRUING DAI HOC SLT PHAM KY THUAT BE THI CUOI HOC KY 1 NAM HOC 2023-2024
THANH PHOl lO CHI' MINI ! Mon: Co’ Sir Cong Nghe Che Tao May
KHOA: CO Kill CHE 1 AO MAY
BO MON: CONG NGHE CHE 1 AO MAY Ma mon hoc: FMMrI'330825
Dc so/Ma dc: 0 1 -23/DT Dc thi co 02 trang.
Thai gian: 75 phut.
Khong duoc phep sur dung tai lieu.
Cau 1: (2,5 diem)
Cho so do tien cat ranh nhu Ilinh 1.
1.1 Ve lai hinh vai day du cac chuyen dong cat chinh, chay dao. Chi ro dau la chuyen dong
cat chinh, chay dao kem theo don vi cua dai lugng dac trung
1.2 Ve mat phang cat, mat phang day
1.3 Ve tiet dien phoi cat vai day du cac thong so va goi ten cac thong so do
Cau 2: (2,0 diem)
Khoan 16 dat cac kich thuoc LI va 11 nhu Hinh 2.
2.1 Ve he toa do va ke ten cac bac tu do can han chc.
2.2 Ky hieu dinh vi va goi ten cac chi tiet dinh vi.
I linh 2
So hieu: BM1/QT-PDT-RD I’V/02 Lan soat xct: 02 Ngay hieu luc: 15/5/2020 Trang: 1/2
Cau 3: (2,5 diem)
3.1 Gia su chi tiet tren Hinh 2 duoc dat len lchoi V de khoan 16. Hay tlnh sai so chuan cho
klch thuoc H
3.2 Xem xct sai so chuan cho klch thuoc L I. Truong hop nao LI co va khong co sai so
chuan? Vi sao?
Cau 4: (1,5 diem)
4.1 Hien tuong cung nguoi la gi? Anh huong cua hien tuong cung nguoi den qua trinh gia
cong nhu the nao?
4.2 Iiay neu anh huong cua vat lieu gia cong va goc trade cua dao den hien tuong cung
nguoi.
Cau 5: (1,5 diem)
Trinh bay phuong phap tir dong dat kich thuoc tren may cong cu da dieu chinh san: khai
niem, dac diem va pham vi sir dung.
Ghi chu: Can bo coi thi khong duoc giai thick de thi.
Chuan dau ra cua hoc phan (ve kien thuc) Noi dung kiem tra
[CLOIJ: Xac duoc duoc cac thanh phan cua qua trinh
cong nghc. Phan tich duoc ket cau, thong so hinh hoc
cua dung cu cat.
Cau 1
[C L 02]: Lira chon dung cu cat, che do cat va phuong
phap gia cong phu hop voi yeu cau ky thuat cua tung be
mat chi tiet.
Cau 5
[CL04]: Van dung duoc nguyen tac dinh vi 6 diem vao
ga dat chi tiet. Tinh duoc sai so chuan va chuoi kich
thuoc cong nghe.
Cau 2, 3
[CL03]: Nhan biet duoc cac hien tuong xay ra trong
qua trinh cat got, cac nguyen nhan gay ra sai so gia
cong, cac yeu to anh huong den chat luong be mat cua
chi tiet may, tir do dc xuat cac bicn phap nham nang cao
do chinh xac gia cong va chat luong be mat cua chi tiet.
Cau 4
Ngay 26 thang 12 nam 2023
X
,T ru ong bo mon
(ky va ghi ro ho ten)
S6 hieu: BM1/QT-PDT-RDTV/02 Lan soat xet: 02 Ngay hieu lire: 15/5/2020 Trang: 2/2
D A P A N M O N C O SCf C N C T M - T H I N G A y 28 /12/2 02 3
Cau 1: (2,5 diem)
- Ve hinh co n, S (0,5 d)
- Chuyen dpng cat chinh: cd quay cua chi tiet: so vong quay: n (vong/phut) (hoac: van
toe cat V (m/phut)) (0,25 d)
- Chuyen dong chay dao: cd tinh tien cua dao: luqng chay dao: S (mm/vong) (0,25 d)
- Ve mp cat, mp day (ve 3D): (0,5 d + 0,5 d)
Ve tiet dien phoi (0,25 d) Goi ten cac thong so (0,25 d)
Cau 2: (2,0 diem)
Khoan 16 nhu hinh can han che 5 bac tu do:
- Tinh tien: OX, OY, OZ
- Quay: OX, OZ
(i,o d)
So hieu: BM1/QT-PDT-RBTV/02 Lan soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 3/6
Phuang an ky hieu dinh vi (0,5 d) va goi ten chi tiet dinh vi (0,5 d) (cham theo bai lam)
Vi du nhu hinh tren, chi tiet ducrc dinh vi bang khoi V dai (4 btd) va 1 chot ty (1 btd).
Cau 3: (2,5 diem)
3.1 Gia su chi tiet tren Hinh 2 dirge dat len
kich thuac H
Taco: A -X i-X 2 + H = 0
H =-A + X! + X2 (1)
Trong do:
X r= O J-O M = OI + U-OM (2)
X2 = OM + y (2)
Thay (2) vao (1) va chu y doi dau, ta co:
H = -A + O I+ IJ-O M + OM + —
2
Don gian OM va chu y rang dai luong A va
oi V de khoan 16. Hay tinh sai so chuan cho
+ Ve chuoi kich thuac: 0,5 d
+ Tinh sai so chuan: 0,75 d
+ Ky hieu dinh vj va chi ro
chuan dinh vi, goc kich thuac
cho truang hap co sai so chuan:
0,5 d
+ Ky hieu dinh vi va chi ro
chuan dinh vi, goc kich thuac
cho truang hap khong co sai so
chuan: 0,5 d
+ Giai thich: 0,25 d
la hang so.
D D
Do do H chi phu thuoc vao dai lugng O I+ 2 2
Ket qua sai so chuan khi thuc hien H :
+D
2sin a ! 2
..
£s_n ,
____
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c{H) 2 1 s in a /2 )
S6 hieu: BM1/QT-PBT-RBTV/02 Lan soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 4/6