Page 4 - Dasar-Dasar Pengelasan (Modul Pembelajaran CoE)

UMUM
i. Pengertian / Definisi tentang Las ........................................................................ 1
ii. Macam-macam Jenis Sambungan ....................................................................... 2
iii. Klasifikasi Pengelasan Berdasarkan Cara Kerja .................................................... 3
iv. Sumber Energi Pengelasan ................................................................................ 4
v. Daya Listrik Arus Las ......................................................................................... 4

I. SUMBER LISTRIK UNTUK PENGELASAN
1.1 Macam Listrik......................................................................................... 5
1.2 Arus Listrik untuk Pengelasan .................................................................. 6
1.3 Sambungan Kabel .................................................................................. 7
1.4 Macam-macam Mesin Las ....................................................................... 8
1.5 Diagram Statis Mesin Las ........................................................................ 11
1.6 Diagram Dinamis Mesin Las .................................................................... 12

II. TEKNOLOGI PENGELASAN LAS BUSUR LISTRIK MANUAL (MMA)
2.1 Busur Listrik (Penyalaan) ........................................................................ 13
2.2 Proses Pencairan Elekctroda .................................................................... 14
2.3 Diagram Statis Pengelasan dan Penggunaannya ....................................... 17
2.4 Pembelokan Busur Listriknya (Arc Blow) ................................................... 20
2.5 Tanda Pengenal Mesin Las ...................................................................... 22

III. MATERIAL

3.1 Klasifikasi Baja Menurut DIN 17100 ......................................................... 25
3.2 Bahan Tambah (Electroda) ...................................................................... 25

IV. KESEHATAN DAN KESELAMATAN KERJA
4.1 Bahaya Listrik dan Pengaruhnya .............................................................. 35
4.2 Bahaya Cahaya dan Sinar ....................................................................... 36
4.3 Sarana Pelindung Tubuh ......................................................................... 37
4.4 Tempat Kerja ......................................................................................... 38
4.5 Peningkatan Keadaan Berbahaya pada Listrik ........................................... 39
4.6 Keselamatan Kerja pada Ruang Kerja yang Sempit .................................... 40
4.7 Bahaya Bising ........................................................................................ 41
4.8 Bahaya Penanganan Alat dan Peralatan ................................................... 43
4.9 Tempat Kerja ......................................................................................... 44
4.4 Tempat Kerja ......................................................................................... 44
4.4 Tempat Kerja ......................................................................................... 44

V. PERSIAPAN PENGELASAN

5.1 Bentuk Penampang dan Nama Kampuh Las .............................................. 45
5.2 Posisi Pengelasan ................................................................................... 46
5.3 Teknik Mengelas .................................................................................... 47

VI. KUALITAS PENGELASAN
6.1 Kesalahan (Cacat) Luar/Dalam ................................................................ 48

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