Metode Penyambungan Logam: Rivet, & Baut Mur...
Transcript of Metode Penyambungan Logam: Rivet, & Baut Mur...
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Garis besar pengelasan Tipe – tipe pengelasan Karakteristik pengelasan Pengelasan untuk panel bodi kendaraan Prinsip dasar pengelasan CO2 – MIG Karakteristik pengelasan CO2 – MIG Konstruksi perlengkapan pengelasan CO2 – MIG Kondisi – kondisi pengelasan Metode – metode pengelasan Peralatan , perlengkapan & bahan Prosedur pengelasan CO2 – MIG Tipe – tipe kerusakan pengelasan CO2 - MIG
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Metode Penyambungan Logam:
1. Mekanis :
Rivet, & Baut Mur
2. Metalurgis :
Las
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Las Tekan ( Pressure Welding ) :
Spot Welding
Las Lebur ( Fusion Welding ) :
CO2-MIG Welding
Las Kuningan ( Braze Welding ) :
Kuningan Keras
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Dapat Membangun Suatu Bentuk yang
kokoh.
Berat dapat dikurangi
Kedap terhadap Udara & Air
Efesiensi Produksi meningkat
Memerlukan keahlian
Panel dapat Rusak bila terlalu panas
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Metode las : Las titik , Las Busur CO2
Brazing pada Area Yang di instruksikan
Pabrik
Las Oxy Acetylene, tdk dianjurkan
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Prinsip Dasar Las CO2- MIG
Pengelasan CO2 adalah suatu type dari las busur yang termasuk kategori las lebur.
Type ini menggunakan sebuah kawat pengisi ( filler wire ) sebagai elektroda yang menimbulkan nyala busur ( pelepasan elektris ) antara kawat pengisi dan logam dasar. Panas yang ditimbulkan oleh busur nyala ini melumerkan dan melebur kawat pengisi yang secara otomatis diumpankan pada kecepatan yang tetap.
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1. Kerusakan pada panel tipis
berkurang
2. Memerlukan ketrampilan
3. Semua posisi pengelasan dapat
dilakukan
4. Slag Pengelasan Sedikit
5. Tidak cocok kondisi berangin
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Metal inert gas (MIG) welding
Gas yang digunakan: argon & helium
Metal active gas (MAG) welding
Gas yang digunakan: carbon dioxide
atau campuranargon/carbon dioxide
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Tipe
pengelasan/karakteristik
Kecepatan
pengelasan
Penetrasi
pengelasan
Percikan
(Jumlah)
Biaya gas Tipe base
metal
Sh
ieldin
g g
as a
rc weld
ing
Pengelasan MIG
(100%)
Aluminium
Stainless
stell
Pengelasan MAG
( Ar + CO2)(Ar +
CO2)
Stainless
stell
Baja
Pengelasan dgn
CO2
(CO2)(100%CO2)
Baja
Baik Tidak Baik
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1. Torch
2. Pengumpan kawat
3. Peralatan supply gas perisai
4. Alat pengontrol
5. Sumber daya
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FUNGSI GAS : Melindungi dari kontaminasi dengan
atmosphere (udara).
Untuk mendukung kestabilan busur
nyala (arc)
Mengontrol bentuk dari beads
pengelasan
Mengontrol kekuatan logam
pengelasan
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Diameter kawat : 0.6, 0.8, 1.0mm
Berat kawat : 5 - 15kg
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1. Arus pengelasan
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Jumlah aliran gas perisai 10 – 15
ltr/menit
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Tip to Base
Metal
Nozzle
Contact Tip
Wire
Arc
Wire Protrusion Length
Tip-base metal distance
Tip to Base metal
Distance
8 ~15 mm
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(Drawing Method) (Thrusting Method)
Forehand Backhand
10 – 30
0
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5. Kecepatan Pengelasan
Tebal Pelat (mm)
Kecepatan
Pengelasan
(Cm/menit )
0.8 105 – 115
1.0 100
1.2 90 - 100
1.6 80 - 85
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1. Plug Welding
Metode Pengelasan
3. Fillet Welding
2. Butt Welding
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Perangkat Las
Peralatan Pengelasan
• Bahan anti karat
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• Air Chuck Grinder
Peralatan Pengelasan
• Belt Sander
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1. Dust respirator
2. Shield face protection
3. cover
4. Safety Technician uniform
5. Fire proof apron
6. Leather gloves
7. Leg shoes
8. Topi teknisi
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Butt Welding
Prosedur Pengelasan
1. Posisikan panel
2. Siapkan Perangkat Las
3. Lakukan Pengelasan Tack
5. Gerinda Ulir-ulir Las
4. Lakukan Pengelasan Utama
6. Pakai Bahan Anti Karat
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Tack welding
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Butt welding
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Welding points
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Plug Weding
Prosedur Pengelasan
1. Membuat Lubang
2. Posiskan Panel
3. Siapkan Perangkat Las
5. Gerinda Titik Las
4. Pengelasan
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Plug welding a damaged panel
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INSUFFICIENT PENETRATION
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EXCESS WELD SPATTER
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IRREGULAR BEAD SHAPE
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BURN THROUGH (Terbakar)