1. WIRE AND BAR DRAWING
POLIN P PANGGABEAN 1504305064
GEMILANG AYU ISWARI 1504305067
STEFANUS DI SALVIO 1504305069
2. DRAWING PROCESS
Drawing is a cold metal forming process
involving pulling a workpiece through a die
providing reduction of the cross section of
the workpiece.
3.
4. Change in size of work is usually given
by area reduction:
r =
𝑨𝑶 −𝑨𝑭
𝑨𝑶
where,
r = area reduction in drawing;
Ao = original area of work;
AF = area of final work;
5. BATAS TEMPERATURE :
temperature kawat tidak lebih dari 160
ºC
BATAS REDUKSI :
Batas reduksi 30 – 35 % dari
penampang awal
6. PROSES DRAWING
Annealing
Pickling
Cleaning
Phosphating
Normalisasi Pointing
Lubrakasi
DRAWING PROCESS
8. Δ FAKTOR
Perbandingan antara diameter rata-rata terhadap
panjang daerah deformasi
Pada wire drawing besarnya Δ faktor :
D : diameter kawat
L : panjang kontak perm. Kawat dan dies
: setengan sudut reduksi
r : reduksi area (%)