دانلود رایگان مقالات عمران و معماری

دانلود رایگان فیلم هاي آموزش جوشكاري

در این آدرس می توانید فیلم های زیادی با ساختار فلش را به طور رایگان ببینید...!

Watch MIG Setup and Procedure Videos

MIG Welding Principles
Principles, procedures, and techniques. What happens at the MIG arc? Identifies weld equipment and setup before welding.
(Duration: 3 Min 18 Sec)

MIG Aluminum Welding
Aluminum welding. How to MIG weld on aluminum with a Millermatic and a Spoolgun. Setup and weld techniques are covered.
(Duration: 3 Min 45 Sec)

Flux cored MIG Welding
Flux cored wires. How the process works for both self-shielded and gas-shielded wires, and where to set polarity.
(Duration: 2 Min 10 Sec)

MIG Welding Troubleshooting Guide
Troubleshooting. How to prevent and fix: birdnesting of the wire, burnback of the contact tip, poor gas coverage, exceeding the machine duty cycle, and thermal overload of the machine.

(Duration: 3 Min 57 Sec)

Butt Joint MIG Welding Demo & Quality Check
After a butt joint is tack welded, see a weld being made using a push gun technique. See what to look for in a finished weld, on both the front and back of the weld. Look for good penetration into the metal without burn-through.
(Duration: 1 min. 13 sec.)

atch Panel Planning
A common MIG application is patching an automotive body panel. See how to prepare for the patch by marking the area to be cut out for plasma cutting. A butt joint is recommended for the edge of the patch.
(Duration: 1 min. 05 sec.)

Lap Weld on Aluminum Plate
See a lap weld made on 1/4-inch aluminum plate, after cleaning the metal and tacking the joint at each end. The finished weld shows good fusion, with the weld flowing nicely into the plate on both sides.
(Duration: 56 sec.

منبع : مجله اینترنتی سیویل

تست چشمی جوش

A      جوش قابل قبول

B       آمپر پایین است

C      آمپر زیاد است

D     طول قوس کوتاه است

E     طول قوس بلند است

F      سرعت حرکت کم است

G     سرعت حرکت زیاد است