B-13

OPERATION

B-13

Vertical-Up Welding

The problem, when welding vertical-up, is to put the molten metal where it is wanted and make it stay there. If too much molten metal is deposited, gravity will pull it downwards and make it “drip”. Therefore, a certain technique has to be followed:

Long arc

Short arc

NOTE: Holder end of electrode is lower than arc.

1.Use 1/8” (3.2mm) 90-115 amps or 3/32” (2.5mm) 70 amps AWS 6011.

2.When welding, the electrode should be kept hori- zontal or pointing slightly upwards. (See drawing above).

3.The arc is struck and metal deposited at the bot- tom of the two pieces to be welded together.

4.Before too much molten metal is deposited, the arc is SLOWLY moved 1/2-3/4” (12-20mm) upwards. This takes the heat away from the molten puddle, which solidifies. (If the arc is not taken away soon enough, too much metal will be deposited, and it will “drip”.)

5.The upward motion of the arc is caused by a very slight wrist motion. Most definitely, the arm must not move in and out, as this makes the entire process very complicated and difficult to learn.

6.If the upward motion of the arc is done correctly with a wrist motion, the arc will automatically become a long arc that deposits little or no metal. (See drawing above.)

7.During this entire process, the ONLY thing to watch is the molten metal. As soon as it has solidi- fied, the arc is SLOWLY brought back, and another

few drops of metal are deposited. DO NOT FOL-

LOW THE UP AND DOWN MOVEMENT OF THE ARC WITH YOUR EYES. KEEP THEM ON THE MOLTEN METAL.

8.When the arc is brought back to the now solidified puddle, IT MUST BE SHORT, otherwise no metal will be deposited, the puddle will melt again, and it will “drip”.

9.It is important to realize that the process consists of SLOW, DELIBERATE movements. There are no fast motions.

Vertical-Down Welding

Vertical-down welds are applied at a fast pace. These welds are therefore shallow and narrow, and are excellent for sheet metal. Do not use the vertical-down technique on heavy metal. The welds will not be strong enough.

1.Use 1/8” (3.2m) or 3/32” (2.5mm) AWS 6011.

2.On thin metal use 70-75 amps.

(14 ga. 75 A - 16 ga. 60 A.)

3.Hold the electrode in a 30-45° angle with the tip of the electrode pointing upwards.

4.Hold a VERY SHORT arc, but do not let the elec- trode touch the metal.

5. An up and down whipping

Very

short

motion will help prevent

arc

burn-through on very thin plate.

30°-40°

 

6. Watch the molten metal carefully.

The important thing is to continue lowering the entire arm as the weld is made so the angle of the electrode does not change. Move the electrode fast enough so that the slag does not catch up with the arc.

POWER-ARC 5500

Page 27 Page 29
Page 28
Image 28
Lincoln Electric IM871-A manual Vertical-Up Welding, Vertical-Down Welding
Page 27 Page 29

IM871-A specifications

The Lincoln Electric IM871-A is a cutting-edge industrial welding machine that exemplifies the brand's commitment to quality, innovation, and efficiency. Designed specifically for professionals in various sectors, including manufacturing, construction, and maintenance, the IM871-A boasts a range of features that streamline the welding process while ensuring longevity and reliability.

One of the standout features of the IM871-A is its advanced inverter technology. This technology not only enhances the machine’s portability but also improves energy efficiency. The inverter design allows for a compact and lightweight unit without sacrificing power output, making it easier for welders to move around job sites while maintaining peak performance. Welders can expect to achieve high-quality welds with minimal spatter, ensuring a clean and professional finish.

The IM871-A is equipped with a multifunctional interface, allowing users to easily navigate through various settings and customize their welding parameters according to specific project requirements. This user-friendly display includes digital readouts for voltage and current, providing real-time information that aids in precision control. Such adaptability makes the IM871-A suitable for a wide range of welding applications, from thin sheet metal to heavier structural components.

Additionally, the Lincoln Electric IM871-A supports multiple welding processes, including MIG, TIG, and Stick welding. This versatility makes it an ideal choice for professionals who require a machine that can handle diverse tasks without the need for multiple setups or equipment. The welder's robust output range further enhances its capabilities, accommodating various materials and thicknesses for both ferrous and non-ferrous metals.

Safety is paramount in any welding operation, and the IM871-A incorporates several features designed to protect the user. These include built-in thermal overload protection, which prevents the machine from overheating during extended use, and an automatic voltage reduction system that ensures the welder remains safe while efficiently managing power.

In summary, the Lincoln Electric IM871-A is a powerful and versatile welding machine built to meet the rigorous demands of industrial applications. With its advanced inverter technology, intuitive user interface, multiple welding process support, and essential safety features, it stands out as a reliable choice for professionals aiming for quality and efficiency in their welding operations. Whether for onsite applications or workshop environments, the IM871-A is engineered to deliver exceptional performance and durability, solidifying its place in the competitive welding market.
Top Page Image Contents