Davison HF Welding Machine experience

Davison HF Welding Machine experience

Postautor: julylee » 25 maja 2017, o 03:27

Regardless of your interests, needs, or motivation, you're a do-it-yourselfer interested in buying your first welder. Whether you already have previous HF Welding Machine experience, or, you're a welding novice, you are likely here because you need some help getting started. Miller Electric Mfg. Co. is dedicated to providing objective, informative and practical information to assist you in making the appropriate choice. Relax and read on. You've come to the right place!
Getting started

Unfortunately, there is no single welding process suitable for all applications, so let’s begin with an overview of the basic processes and highlight the capabilities and advantages of each. This will help us better match a process to your specific needs.

If you have previous welding experience, feel free to skip ahead. If you are somewhat of a novice, this section will provide you with a better understanding of the types of welders available, how each performs and degree of welding skill required to operate each. In addition, we’ll offer examples of specific applications best suited to each process.

Matching your needs and welding skills with a specific process is critical before moving on to discuss specific welder model options.
Welding Processes

The most common welding processes include Stick, MIG/Flux-cored and TIG. Each process has its own unique set of benefits and limitations, works well in some welding applications, and not well in others. There’s no “one size fits all” — and as you will soon discover — for good reason.

Stick Welding — If you learned to weld years ago, you likely learned using an arc welder. Stick welding has, for many years, been the most popular method for most home-shop welding needs. Stick welding uses an electric current flowing from a gap between the metal and the welding stick, also known as an arc-welding electrode. Stick welding is an effective method for welding most alloys or joints and can be used both indoors and outdoors, or in drafty areas. It is also the most economical welding method and largely popular because of its ability to create an effective bond on rusty or dirty metals.

Arc welding is limited, however, to metals no thinner than 18-gauge, requires frequent rod changing, emits significant spatter; and welds must be cleaned upon completion. Stick welding is also more difficult to learn and use, particularly the ability to strike and maintain an arc. Arc welders are available in either AC or DC or AC/DC; with AC being the most economical. It is used for welding thicker metals of 1/16-inch or greater. They are a good choice for farmers, hobbyists and home maintenance chores.

MIG Welding / Gas Metal Arc Welding (GMAW) — MIG welders use a wire welding electrode on a spool that is fed automatically at a constant pre-selected speed. The arc, created by an electrical current between the base metal and the wire, melts the wire and joins it together with the base, producing a high-strength weld with great appearance and little need for cleaning. MIG welding is clean, easy and can be used on either thin or thicker plate metals.

A slight variation of MIG welding — Flux-Cored Arc Welding (FCAW) — is similar in that it is also a wire-feed process but differs in that it does not require a shielding gas. This gas-free welding application uses Flux-Cored wire to shield the arc, and is a simple, efficient and effective welding approach, especially when welding outdoors, in windy conditions or on dirty materials. The process is widely used in construction because of its high welding speed and portability.

Both MIG and Flux-Cored are very easy to learn and can create extremely clean welds on steel, aluminum and stainless. Both types have the capability to weld materials as thin as 26-gauge.

TIG Welding / Gas Tungsten Arc Welding (GTAW) — TIG welding is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually argon), and a filler metal, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy that is conducted across the arc through a column of highly ionized gas and metal vapors known as plasma.

TIG welding is most commonly used to weld thin sections of alloy steel, stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than other welding processes, allowing for stronger, higher quality welds. TIG welding is comparatively more complex and difficult to master than other welding types, and is significantly slower.

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