Basics of Welding from Logos Weld

Just like any work of art, welding too requires a thorough knowledge of the basics in order to master its different processes. Here is a simplistic understanding about welding and related topics from Logos Weld Products - one of the leading Weldingrod manufacturing plants in India.

To begin with welding is the process through which materials are joined together to form a firm joint. Usually metals or thermoplastics are used in this process. What makes welding different from the other metal joining techniques like brazing and soldering, is the fact that when two metals are joined together in this process, a decent amount of 'melting' of the metals takes place.

Some of the best welding methods are:

1. Shielded Metal Arc Welding
2. Gas Metal Arc Welding
3. Flux-Cored Arc Welding
4. Submerged Arc Welding

Shielded metal arc welding uses an electrode which has the flux around it. This flux is the protectant for the puddle around the electrode. The electrode holder on the other hand holds the electrode as it melts away in the welding process. The slag on the other hand protects the weld puddle from atmospheric contamination of any kind. Gas Metal Arc Welding on the other hand uses a wire feeding gun. This wire feeding gun feeds the wire at an adjustable speed and flows an inert gas (Argon gas) or a mix of carbon dioxide and Argon over the weld puddle to protect it from atmospheric contamination.

Flux-Cored Arc Welding is quite similar to Gas metal arc welding. The only exception is that this method of welding uses a special tubular wire filled with flux. Depending on the filler, you can either use or not use the tubular wire. While the Submerged Arc Welding makes use of an automatic fed consumable electrode along with a blanket of granular fusible flux. In this method of welding the molten weld and the arc zone are constantly protected from the atmospheric contamination as it is “submerged” under the flux blanket.

These are some of the basic ways in which welding can be done. 

For better understanding about the various kinds of welding and other Logos Weld products visit www.logosweld.com.

Logos Weld with their state-of-art Weldingelectrode machine exporter are the best Weldingelectrode flux exporter in India. 

We are ISO 9001:2008 certified and have been providing quality welding services since 1994.

Different kinds of sieving machines

Sieving is the process through which unwanted elements are removed from the wanted elements. This surely is a very lose way to describe the process of sieving; because many times this technique is also used to separate particles of various shapes and sizes in order to refine the product. Usually a siever has a net or a mesh in order to screen out the unwanted material.

A sieving machine typically consists of two chambers – one in which the waste/ unwanted materials are collected; another which collects the required material. These machines come in various shapes & sizes and are used depending on the industry of work. Based on their shape and size sieves can be broadly of three types:

1. Perforated plate sieves: This type of sieve confirms to the ISO 3310-2 and has a diameter range from 200 to 450 millimeters. The perforated plate sieves have square/ round nominal apertures which ranges from 1 millimeter to 125 millimeters.
2. American standard sieves: They are also known as ASTM sieves, as they conform to the ASTM E11 standard. Unlike the perforated plate sieve, ASTM sieves are available in only 8 and 12 inch diameter sizes. Their nominal aperuture ranges from 20 micrometers to 200 millimeters.
3. Woven wire mesh sieves: One of the most commonly used sieves, woven wire mesh sieves conform with the ISO 3310-1. Their nominal aperture ranges from 20 micrometers to 3.55 millimeters, and when it comes to their size – these sieves diameter ranges from 100 to 450 millimeters.

As has already been mentioned, based on the end-requirement, sieves are selected and brought into use. According to Logos Weld – leading Wire Straightening and Cutting Machines Manufacturer in India – it is important that the size and capacity of the work load should be taken into consideration before investing on any such machines. The other important aspects that needs to be paid attention to are:

• The construction of the sieve

• Its design

• The housing should be non-corrosive in nature

Most of all, the sieve should be easy to maintain

Logos Weld also recommend a sieve analysis test before settling on a sieving machine. A sieve analysis is basically a process through which the gradation or the size of the particles to be separated can be assessed. This test can be performed on organic as well as non-organic materials. Usually this process is quite widely used in the area of civil engineering. But those belonging to other industries too can make use of this analysis so that they choose an appropriate siever.

For more information on sieving machines and welding rodmanufacturing plants you can visit www.logosweld.com or call at +91 422 2934784.

Flux-Cored Arc Welding

Welding involves joining different materials together. In the welding process a good amount of 'melting' of the metals takes place while fixing two metals together, andn this is what differentiates it from soldering and brazing. Usually metals or thermoplastics are used in the welding process. Flux-cored arc welding (FCAW) is one of the popular welding processes. It is an automatic or semi-automatic arc procedure. Introduced in the 1950s, this process involves the use of a new kind of wire electrode on an MIG welding machine. This is the reason why flux-cored is regarded as similar to MIG welding process. The equipments used in both the processes are same, so are wire fields and power supply. The wire used in this purpose is the tubular wire and not that the usual solid wire.

Basically there are two types of flux-cored wire:

• Self-shielded

• Dual Shield

While self-shielded wires do not use any external gas shield, rather they employ the flux to shield the molten weld puddle; dual shield wire uses both the external shielding gas as well as the flux to protect the molten weld puddle. Usually carbon dioxide and argon are used as shielding gases in dual shield flux cored wire.

If we compare flux-cored arc with MIG welding process, then it is has greater productivity. While a MIG welder can produces on an average 5 to 8 pounds of weld in an hour, FCAW produces above 25 pounds of weld per hour. Along with higher productivity, flux-core welding can weld 1/2” plates at a time that too on both the sides with full penetration. This is the precise reason why this welding process is used in the ship building industry which requires high quality welds which are not time consuming and can work even in windy conditions. It is also used in construction industry due to its speed and portability.

Advantages of Flux-cored arc welding

• This welding process involves minimal weld clean up

• It requires lower heat inputs.

• The electrode efficiency is extremely high.

• No external shielding gas is required.

• Reduced welding fumes.

Disadvantages of Flux-cored arc welding

• It is recommended for heavy material only. Thus cannot be used for thin materials.

• Lot of smoke is generated in the whole process.

• Produces a lot of slag.

• The cost of the equipment is extremely high.

For more information on welding and weldingelectrode making machine, you can visit http://www.logosweld.com/Contact-us.html or call at +91 422 2934784.

Logos Weld with their state-of-art weldingrod manufacturing plant are the best WireStraightening and Cutting Machines Manufacturer. They hold ISO 9001:2008 certification and have been providing quality welding services since 1994.

Common welding mistakes which you need to avoid

Welding is the process which involves joining different materials together. Unlike soldering and brazing, during welding a good amount of 'melting' of the metals take place while fixing them together. Ususally thermoplastics or metals are used in the welding process.

Like any other sphere of work, welding too requires an indepth understanding of the basics. There are some mistakes which are commonly committed in the welding process. Right from using the wrong voltage, to creating an arc way too longer than is required. Logos Weld Products is one of the leading welding electrode plant supplier in India. With years of experience and expertise, here is a list of mistake which needs to be avoided in the welding process.

Mistake #1 – Making the arc outside the weld joint

Striking is not an easy task, more so in case of beginners, due to which several times it is seen that the arc is striked outside the weld joint. The best way to avoid this situation is to begin from the point you plan on welding. This way not only will you avoid striking in the wrong manner and also bring down the risk of damaging the other parts of your work piece.

Mistake #2 – Using the wrong current for welding

Yet another common mistake, often it is seen that welders use the wrong current in the welding process. You just need to take the type of metal and electrode into consideration, and it becomes easier to decide which current to use (DC/ AC) and the quantity of current to be used. If you are a first-timer, it is recommended that you cut some scraps of the metal and test it with your settings. This way you will get to know which is the right current for that particular metal.

Mistake #3 – Using electrodes which are damaged

It is very important that the welding electrode plant is not damaged in order to get the results you are looking for. A MIG wire with oil/ rust or a moist electrode for stick welding is sure to cause problems. Always keep in mind that the 7018 electrodes which are used in stick welding needs to be kept dry and warm in an electrode oven. In case there is no oven, then all you need to do is heat the 7018 electrodes before using them for welding.

Mistake #4 – Not cleaning the metal correctly

This is one of the most common and perhaps easily avoidable mistakes in the welding process. The quality of welding is affected if the metal is not cleaned in the right manner. Especially in the case of TIG welding, it is crucial that you use the right solvent like acetone. This way the quality of the welding will not be compromised. Other solvents like paint thinners etc too can be used for cleaning the metal.

To get more information on weldingelectrode making machine you can visit www.logosweld.com or call at +91 422 2934784.

Logos Weld with their state-of-art welding rod manufacturingplant are the best weldingproducts suppliers in India. They hold ISO 9001:2008 certification and have been providing quality welding services since 1994.

Sieving machines and their types

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The process of removing unwanted elements from those which are wanted is called sieving. Apart from this the process is also used to separate particles of various shapes and sizes in order to refine the product. In most of the cases a siever has a net to screen out the unwanted material.

Typically a sieving machine consists of two chambers – one which collects the required material, and the other wherein unwanted material is collected. Depending on the industry of work, seiving machines come in various shapes & sizes. Broadly they are of three types:

1. Perforated plate sieves: It confirms to the ISO 3310-2 and has a diameter range from 200 to 450 millimeters. The appertures in the perforated plate sieves ranges from 1 millimeter to 125 millimeters and are square/ round in shape.

2. American standard sieves (ASTM): They conform to the ASTM E11 standard and unlike the perforated plate sieves, are available in only 8 and 12 inch diameter sizes. Their nominal aperture ranges from 20 micrometers to 200 millimeters.

3. Woven wire mesh sieves: This is the most commonly used sieves. They confirm with the ISO 3310-1 and have a nominal aperture ranges from 20 micrometers to 3.55 millimeters. Their diameter ranges from 100 to 450 millimeters.

Based on the end-requirement, sieves are selected and brought into use. According to Logos Weld – leading sieve machinemanufacturers in India – it is important that the size and capacity of the work load should be taken into consideration before investing on any such machines. The other important aspects that needs to be paid attention to are:

• The construction of the sieve

• Its design

• The housing should be non-corrosive in nature

• Most of all, the sieve should be easy to maintain

Logos Weld also recommend a sieve analysis test before settling on a sieving machine. A sieve analysis is basically a process through which the gradation or the size of the particles to be separated can be assessed. This test can be performed on organic as well as non-organic materials. Usually this process is quite widely used in the area of civil engineering. But those belonging to other industries too can make use of this analysis so that they choose an appropriate siever.

Logos Weld is the leading weldingelectrode flux manufacturer exporter. They have some of the best wirestraightening and cutting machines. You can get more information on sieving machines at www.logosweld.com or call at +91 422 2934784. 

TIG welding – How does it work?

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TIG in TIG welding stands for Tungsten Inert Gas. It is also known as Gas Tungsten Arc Welding (GTAW) and involves the use of non-consumable tungsten electrode to deliver current to the welding arc. This welding technique was developed in 1930s and was used during the times of secong world war to weld parts of aircraft and is today used in welding stainless steel, chromoly, aluminum, bronze, brass and gold.

How to weld with TIG?

Logosweld is among the top welding electrodes machine suppliers inIndia. Here is a brief expalnation on how the TIG weld works.

The first step is to clean the welding material. You can use stainless stell wire brush for aluminum, sander for carbon steel while for stainless steel all you need to do is wipe the weld area with a solvent. Once the surface is clean, the next step is to use tungsten electrode. You need to open the back of the electrode holder on the collet. Then insert the tungsten electrode and close the electrode holder. Make it a point that the electrode hangs at least 1/4-inch away from the protective sheath on the collet.

Now use a C-clamps to secure the parts you wish to weld together. You can also make use of tack welds to hold the parts in place, until the final welding has taken place. The next step is to hold the TIG torch at about 75 degree angle, with the tunsgten raised up to 1/4 inch off the metal. It is important that the tungsten does not touch the work piece, or else it will contaminate the material.

With the torch heatup the base metal and advance the puddle in the desired direction using your arc. Continue to advance the puddle until the whole of the desired area has been welded.

And with this your TIG welding has been completed.

To get more information on welding and related services, visit www.logosweld.com. You can also call at +91 422 2934784 and get a detailed understanding of their services.

LogosWeld is the top welding electrode plant and machineriesexporter. They have the best welding electrode manufacturing plant which is in-sync with the latest technology.

Various powders used in welding electrode

One of the major raw materials used in the electrode welding process are powdered form of metals, minerals and ferro alloys. With higher productivity, improved quality of weld products and demand for better welding characteristics, most welders have starting using metal powders as an important component in cored wired as well as for coating the welding electrodes.

Nickel powder, iron powder, tin powder, tungsten powder are some of the most commonly used metal powders in the welding rod manufacturing plant. Among all these powders, the use of iron powder shows great results in improving the quality of the products. Even the efficiency of the electrode improves as slag is removed, spatter level comes down and the re-striking feature is quite better.

Iron powder can be used in various industries – right from welding, brazing, metallurgy, iron fortification, dyes & stains, treatment of iron chlorosis to the making of sintered products, soft magnetic products, friction products, breaks & clutches, filtration and metallurgy. Generally the high quality fine iron powder is used in the manufacture of soft magnetic components, printing, surface coating, polymer filterations and in soft magnetic components.

Here are some varieties of iron powder:

Iron325

This variety is used specifically in the manufacture of low to medium density P/M applications, resin casting, printing inks and smooth magnetic paints. It is super fine and high in green strength.

Iron100

Used mainly in rough magnetic paints and resin casting. It is a high green strength reduced iron powder.

S100

Used in fire works, electro magnetism as iron fillings, chemical reactions for the production of iron chloride, iron sulfide etc and in concrete to increase weight.

S1001

A highly compressible, water-atomized steel powder, S1001 is specifically designed for providing high density and strength in powder metallurgy and forging applications. Along with this it is also used in the production of metal clays, magnetic paints, resin casting and brazing pastes.

SM1001

This is a high purity soft iron powder used in making of soft magnetic components using resin casting method. It is highly compressible, water-atomized powder specifically meant for high density and high strength soft magnetic P/M components.

IRON12

A coarse spongy iron powder made of high purity iron ore, it is used in chemical applications as well as in friction and filtration applications as well.

Depending on the industry and application requirements, any of these welding electrode powders can be used.

For more information on welding and welding powders, visit www.logosweld.com or call at +91 422 2934784.