MIG welders guides: how to become a more skilled welder and how to select the best welding equipment. Contact tips can have a significant impact on MIG welding performance since this consumable is responsible for transferring the welding current to the wire as it passes through the bore, creating the arc. The position of the contact tip within the nozzle, referred to as the contact tip recess, is just as important. The correct contact recess position can reduce excessive spatter, porosity, insufficient penetration, and burn-through or warping on thinner materials. While the ideal contact tip recess position varies according to the application, a general rule of thumb is that as the current increases, the recess should also increase.
Look for ways to create more efficiencies in the welding process. This includes examining such things as wire diameter, wire feed speed, voltage, travel speed, gas type, transfer mode, etc. For instance, if the shop is currently welding with a short arc process and a 75/25 blend of shielding gas, it may be more effective to switch to a different gas and a spray mode of transfer. Or, a change in process may be warranted based on the condition of the part. If there is oxide on the part, it may be easier to change to a process that will overcome contamination problems rather than try to clean each part before welding. Your welding supplier should be up to date on the latest technology and be able to advise you on new processes, machinery and consumables that can optimize welding at the shop. In some cases, it may be better to double bevel a joint to prepare it for welding rather than single bevel it. It is recommended to double bevel any material that is more than 3/4″ in thickness. Just this simple change in procedure can save quite a bit in weld metal. On a 3/4″ thick piece, a double bevel will use 1.45 lbs. per foot of weld metal while a single bevel will use 1.95 lbs. per foot.
A few advices about welding equipment, MIG and TIG welders, plasma cutters. Identify the types of welding projects and materials you will weld most of the time. Are you creating metal sculptures? Do you intend to restore an old muscle car in your garage? Does the motorcycle you bought years ago require some fabrication? Maybe you need to do basic repair on farm equipment. Taking the time up front to identify the projects that will occupy the biggest percentage of your welding activity will help you determine the specific thickness of metal you will likely weld most often – and ultimately help you select the most suitable welder. Time to get a bit more specific. Let’s take a look at what welding process you can use for each metal type. Keep in mind that many of these materials are also processed using varying combinations of two or more metals to reinforce strength and functionality.
The welding setup, welder settings, and electrode selection will impact how fast welders can work. Industrial welders invest time in planning the size and shape of their welding areas, how parts are laid out, and how they supply their shielding gas. Testing settings or an electrode on a piece of scrap metal, especially for a beginners, will save time in the long run. Learn more about setting up an efficient shop here. Welding Downhill Increases Welding Speed: While welding downhill is a faster way to weld, it’s not as strong as welding uphill. On most projects it’s not worth sacrificing strength and durability for the sake of welding speed. However, if the metal is thin enough, then welding downhill won’t make the weld weaker and may even be the correct technique for the job. Learn about uphill and downhill welding and see these diagrams of vertical and downhill welding. Read additional info at MIG Welding Machines.
Don’t use too much torch gas when welding aluminum on A/C. Don’t use too much torch gas when welding aluminum on A/C. Aluminum takes a lot of amperage to weld. Even though the melting temperature of aluminum is less than half that for steel, it takes about twice as much amperage to weld. Why? Because aluminum conducts heat away from the weld puddle faster than you can put it in. this brings me to an important point. Do not use more argon than necessary on your torch gas. If you do, it will be like blowing cool air on something you are trying to heat up with a torch. All that argon blowing on the part makes for a loud erratic arc because the arc force is so great. Have you ever lit up on a thick aluminum casting and listened to how loud the arc is? I bet your torch gas was up around 20 like the books recommend. That’s too much for aluminum (unless you are using an argon helium mix).
Best value MIG welders online and welding advices? We have many articles on this topic, you can use the search form of this post doesn’t answer your questions.
Gasless welding, which is also called “Gasless” or “No-Gas” welding, is the main convenience of contemporary MIG welders. That means they can make welds either with or without gas. It is possible thanks to the use of a special tubular wire filled with a flux and metal powder called a flux-cored wire. In a nutshell, when a flux-cored wire is used, its components generate a shielding gas under a high temperature that is essential for a high-quality joint. The thermal overload protection is also a useful feature that will switch the unit off automatically if the temperature reaches a certain level. Surely, a MIG welder is not something you will carry every minute. Yet, if a machine is lightweight and fitted with wheels, using it will be much more pleasurable. Finally, pay attention to the kit each tool comes with. Some models include a welding shield, coil, attachment for flux-cored welding, hammer, or brush. So, take these features into account when buying a welder.
How to pick a welder tips: MIG wire inch button: A great feature. This will save you wasting your shielding gas when feeding wire through at the start of a new reel. Gas purge button: Another nice option. Save yourself some MIG wire, when you’re setting your gas flow. Burn back facility: Not all machines have this externally, buy it’s good to be able to trim the burn back to the wire according to the application & operator. Selecting the correct amperage machine: Generally, you should work on 35-40 amps per 1 mm diameter of material to be welded.
Delivery of parts to the welding station in an organized and logical fashion is also a way to reduce welding costs. For example, one company was manufacturing concrete mixing drums. In the fabrication process, the company produced 10 parts for one section, then went on to make 10 parts of another drum section, etc. As pieces came off the line, they were put onto the floor of the shop. When it was time to weld, the operator had to hunt for the pieces needed and sort through them. When the outside welding expert pointed out the amount of time being wasted in this process, the company started to batch each one on a cart. In this way, the pieces needed to weld one drum were stored together and could easily be moved to the welding area. This type of scenario is also true for companies that may outsource parts to a vendor. Though it may cost more to have parts delivered in batches, it may save more in time than having to organize and search through parts to be able to get to the welding stage. How many times each piece is handled in the shop may be an eye-opener to reducing wasted time. To measure such an intangible as this, operators are asked to put a soapstone mark on the piece each time it is touched – some companies are surprised to find out how many times a part is picked up, transported and laid down in the manufacturing process. In the case of one company, moving the welding shop closer to the heat treatment station eliminated four extra times that the part was handled. Basically, handling a part as few times as possible and creating a more efficient production line or work cell will reduce overall costs.
A few advices about welding equipment, MIG and TIG welders, plasma cutters. A MIG welder uses a continually feeding spool of thin filler wire as an electrode fed by a wire feed gun to form an electric arc between a wire and the work-piece metal. This heats the work-piece metal and the electrode, causing them to melt and join together to create the weld. Mig welding can be either Gas or Gasless and each have benefits. Gasless welding is far more portable as there’s no gas bottle to carry around, saves cost on having to buy gas bottles and regulators, is easier on positional welds and can penetrate deeper than Gas MIG although the welding wire for a gasless MIG is more expensive than a gasless MIG. Gas MIG welding produces much cleaner welds with no slag or spatter, is slightly better on thinner metals and the welding wire is cheaper than gasless MIG wire. Read extra details at MIG Welders Online Store.
USA market pick: LOTOS Technology is a California company that has only been around since 2007. Still, the LOTOS MIG is impactful and high quality enough to make it onto our list. This one is a versatile machine that is a fair price of about $400. And—provided that you have the necessary 240-volt outlet in your home—it can be set up in a matter of minutes. The duty cycle of this welding newcomer is impressive, and it can be utilized by pros and amateurs who have been continually impressed by the bang they’ve gotten for their buck. The LOTOS can weld steel and stainless steel from 18 gauge to ¼ inches and aluminum to 1/8 inch or thicker. Thermal overload protection doesn’t let this machine overheat, and infinitely adjustable heat/amperage as well as wire speed makes using the LOTOS simple. Check out the LOTOS MIG140 for a lower power alternative.
Another quality machine from Hobart that has 25A for 190A output range so you can weld up to 5/16 in steel. The power input is only 230V so you won’t be able to use this on your standard household power outlet. The 190 is a wise choice if you’re considering buying a 140A welder but think you may want to upgrade in the future. It’s not much more expensive and you can always turn the 190 down but you can’t turn a 140 up. There’s loads including for the price, you get power, durability, a good duty cycle and all the extras you need to get started, including .030 contact tips, 0.30 flux cored wire and gas gauges. See the full review here.
If you are looking to buy the best drill, then you must ensure that you get value for your money. Based on the review about each of the drill is perfect for different users based on their preferences and the features they have to offer. Since it may be used in construction application, please ensure that you understand the security feature being offered by the different manufacturers.
BLACK BLUEROCK BRM-35A – In case you’re looking for something with a good drilling capacity and consistent performance, the BRM-35A model might be a good solution. It comes with a free chuck, oil bottle, adapter, safety chain, and a hard case. Its 110V motor is able to deliver up to 570 RPM which is more than enough to drill through tough materials. On top of that, this model uses a standard 3/4? Weldon Shank which is a good thing because it can be found easily in almost any hardware store. The design is a pretty standard one, although there are some things that should be pointed out. The first thing most people notice is the simplicity. In simpler terms, everything is at reach and positioned well. Two on/off switches are located on the side of the machine, one is for the machine itself, while the other regulates the magnet. As far as the magnetic aspect goes, the electromagnet works fine and performs as advertised. Bluerock might not be the most well-known brand out there, but they do produce relatively good machines, especially mag drills.
As you can already tell from the title, it has more features and accessories compared to its predecessor in this list. It is very lightweight, powerful, versatile and compact. These are the four best words to describe it. It has a lift detector system, rear mounted control and gravity feed system where the HMD904S coolant bottles are stored. The coolant help reduce heat build especially when you are performing a heavy-duty assignment. It comes with a three-year warranty meaning the manufacturers assures of quality service from this tool. See extra info on Rotabroach.
This drill, though not quite as advanced as our top pick, will be an excellent addition to your arsenal. It is a lightweight mag drill that comes with a swivel base magnet, making it easy to use during horizontal or overhead jobs. The HMD904S has a powerful 7.2A motor and you can drill holes with a diameter of up to 1.5” and up to 2” deep. This drill is incredibly versatile and features a two-stage magnet that increases power by up to 30%. The drill is also fitted with a pilot light, making it possible to do accurate work, even in conditions with inadequate lighting. For added convenience and accuracy, the drill is fitted with a slot drive arbor, making it quicker to change out accessories. This drill is designed for industrial and heavy-duty applications. You will be able to drill thousands of holes with no problems whatsoever. As a versatile tool, this drill is perfect for the casual handyman as well as the professional steelworker.
Hougen 115 volt hmd904 magnetic drill press is one of the best mag drill machine available in the market. And also the best thing is that Hougen upgraded this drill press recently. Thus it becomes more efficient and accurate from the previous one through their continuous development and innovative designs. New attachments of this great product are slot drive arbor, which not only enhances accuracy but also enhances the change-out mechanism. Drill bit also made with sturdy material. Cutter/Mount – Rota broach or Copperhead 3/4 inch shank. Thus it can make a smooth hole. This is great for horizontal, overhead, tight areas, and getting out of another piece of steel.
Looking to purchase the best flexible metal conduit? Here are some recommendations and extra details helping you to make the best choice.
Conduit is a type of tubing that you can feed your cable through, it can be made up of plastic, fibre or metal. Electrical conduit can provide the structure, cable protection and support for the cable you run through it. Electrical conduit is a safe and tidy solution when installing single or bunched cable together. Cable conduit is the perfect solution to support the installation of electrical cable, running cable underground, through walls or when cabling needs protection in an exposed area.
The general procedure for using thin wall conduit is similar to the use of steel armor cable. The big difference is that conduit cannot be “snaked” through openings in ceilings and walls. You must have full access to joists and studs to install electrical conduit. So you probably won’t want to use it unless your local code requires it. IMC is typically used in hazardous locations, and in its stainless steel formulation, IMC is widely used in the food and beverage industry, in chemical plants, in cosmetic and pharmaceutcial industries, in refineries, in pulp and paper mills, in marine and coastal sites, in other corrosive environments. An advantage of IMC is its larger interior diameter compared with RMC of the same nominal sizes, making it easire to pull wires. See extra info at Corrugated Conduit.
Electrical metallic tubing, or EMT, is the most common type of conduit for exposed interior installations, such as in a basement or an unfinished garage or workshop. It is the lightest and thinnest of the rigid metal conduit types and comes in a few different diameters; 1/2-inch is the most standard size for household circuits. EMT is also called “thin-wall” and is relatively easy to bend with a tool called a conduit bender. EMT is permitted by the National Electrical Code (NEC) for dry and wet locations but requires special watertight fittings and connectors in wet locations. With proper installation, EMT raceway can serve as a circuit ground path and be used in place of a separate ground wire running inside the conduit.
The flexible metallic tubing (FMT) is made to give great flexibility and includes a metallic tube-like design. It really is very easy to route or shape to fit probably the most difficult areas. That is why it is great to utilize on the do-it-yourself projects where it is much better to not join multiple components of Stainless Steel Flexible Conduit together. Also, this kind of tubing does not feature any form of waterproof protection.
Liquid-tight flexible metal conduit (LFMC) is a special type of flexible metal conduit that has a plastic coating and is used with sealed fittings to make it watertight. It is commonly used with outdoor equipment, such as air conditioner units.
CorrugatedConduit.com is a leading supplier of flexible conduit located in Kowloon, China. We have 15 years cooperating qualified manufacturer in mainland. Because of our good quality control management and large volume we are able to sell you the best flexible conduit at competitive prices. Source: https://corrugatedconduit.com/.
Denver company for quality 3D printing fiberglass latest news. 3D printing is a relatively new technique in the manufacturing world. Let’s start with some examples, focusing on 3D printing applications in the modern world.
Companies now offer mass customization services where consumers can customize objects through simple web-based customization software, ordering the resulting items – mobile phone cases for example – as unique 3D printed objects. 3D printing technologies have created what is called ‘agile tooling’. This is where tooling used in manufacturing processes such as hydro-forming, stamping, and injection molding is designed by modular means, enabling quick prototyping and responses to tooling and fixture needs.
Fashion is often on the cutting edge, so it’s no surprise it’s started to pick up on 3D printing applications. What’s cool about the one above, though, is that you can use the software and materials to create an awesome printed design and then sew it on to an existing piece of clothing – it’s a really neat DIY and customizable twist. Some of the following projects are incredible with people creating everything from food to fashion to actual human body parts. Read on for our picks of the coolest projects.
Looking for 3D printing services in Denver? Not every prototype can be printed. We have many other Denver based sources for machining and fabrication, and will make sure that you are getting parts that meet your expectations for fit and finish. If you need a basic physical model made for scale reference, or a fully functioning representation of a production part, our 3D printing services will be a perfect fit. We can create the CAD file for you, or you can send us an existing model to print. We will work with you to determine the best method of printing to meet your needs. Read extra details on 3D Printing Denver.
This is the reality of 3D printing today. Digital files of real things change hands with little or no control over who creates it or when it gets created. This is where the music industry was at the time of Napster. The difference today is how the major players are handling the loss of IP control. So far, the industries most affected by 3D printing have taken a step back and are looking at where everything is heading. That’s not to say they are not going after IP theft; plenty of companies actively remove offending models from sites like Thingiverse and others. It is the smart companies that see the future and want to be a big part of it.
Geoff is an industrial designer with ten years of product development service and mechanical design experience. He received his bachelors degree in Industrial Design from Philadelphia University, and has Solidworks and additive manufacturing certifications. Source: http://maxkohldesign.com/.
Highly conductive materials like aluminum require very high power to form quality spot welds. However aluminum alloys are routinely spot welded (see Table I for weldability). Here, cleanliness is much more of a concern than with low-carbon steels because of aluminum’s rapid surface oxidation characteristics. For optimum quality and weld performance, expensive cleaning procedures to remove surface oxide are required. For demanding applications, equipment to monitor surface resistivity from lot to lot is necessary to assure consistency of quality. This leads to a related consideration. If aluminum has been chosen for an important reason, such as lightweight or high strength-to-weight ratio, the added expense of ensuring a high-quality weld should be justified. If it has not, re-evaluation of the original material selection is in order or, perhaps, another assembling method should be considered.
If the sheets are the same thickness then the power setting used for plug welding would be the same as you would use for 1.5 times the thickness of one of the sheets. This is the sort of penetration you would expect from a plug weld. The molten pool is just breaking out of the reverse of the back sheet. The heat marks indicate the weld has arced against the back sheet rather than at the side of the hole. If you don’t get these marks then consider a little seam welding just to be sure. There is a special clamp designed for plug welding that makes life really easy. The parts you see in the photograph are attached to a normal mole grip. This clamp came in a set of three random welding clamps all of which are extremely useful.
Spot welding is a resistance welding process that is used primarily for welding two or more metal sheets together by applying pressure and heat to the weld area. It works by contacting copper alloy electrodes to the sheet surfaces, whereby pressure and electric current are applied and heat is generated by the passage of current through resistive materials such as low carbon steels. Read more details at Tecna Spot Welder Parts.
To make sure your welding settings are correct, you should carry out a test run using metal offcuts, followed by a destructive test where you separate the welded parts with a hammer and a forked chisel. After separation, a hole must be made in one of the two conjoined sheets – a process known as “unbuttoning” in metalworking jargon – as proof that the settings are right for the metals and thicknesses involved. Apologies for the abstruse technical term! When welding radiators, make sure you also carry out a leak test.
How to earn cash by playing games ? Sounds fabulous but this thing really exists ? Yes and i will make an overview of the “play and earn” methods available in 2019 and finishing with an InBoxDollars review, a make money from home opportunity platform that also has a gaming section, where you can earn cash by playing games.
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Now let’s move with some simple make money while gaming method: Sites such as Swagbucks and MyPoints offer their members opportunities to play online games in exchange for points – and these points can then be traded in for gift cards or even Paypal payments! Now, this method often includes spending some money up front: you purchase game tokens at GSN.com (or whatever game site your points club partners with), and earn a certain number of points in exchange. But if you like to play those sorts of online games anyway – games like Super Plunko, Deal or No Deal Slots, and Bejeweled 2 – this can be a good way to turn your enjoyment into a gift card or cash return. And Swagbucks even has some free games on their own site! Read extra details at InBoxDollars Review.
Bananatic is one of the best mobile apps out there for mobile gaming. In short, you get paid for every activity you partake in on this app, and all of the tasks are related to gaming in one way or another. When you earn with Bananatic your points can be exchanged for paid games, gift cards, cash or other forms of paid digital content. The best part is that you can also connect with other like-minded plays are develop an online community that you can connect with. Long Game is a little bit different when it comes to its counterparts. Long Game works by having you deposit money into their in-app savings account from your bank account with as little as $5. Each time you make a deposit, you earn a certain amount of coins.
With all of the information about InboxDollars available, you need someone to break it down for you and give you the insider scoop. Guess what? We’re here for just that. We’ll tell you if you should use the platform, and how to use it. If you’re an online gamer, then this is the way to earn your cash. With options for word search, solitaire, or a candy crush imitation game, you will be able to find something that you can at least tolerate playing. Source: https://yourmoneygeek.com/inboxdollars-review/.
Today’s topic is : Span gas bottle online provider UK. Of course the right shielding gas is not the only consideration – your safety when using high-pressure cylinders is also paramount. It’s important to go to a reputable company to rent your shielding gases, so you can be sure strict standards are met and cylinders comply with regulations. Renting a cylinder from WSD (weldingsuppliesdirect.co.uk) gives you peace of mind. You know it is well maintained and renting can also be more cost effective. Find out why it’s good to rent. It’s also a priority to use the right safety equipment such as helmets and gloves, which you can also find through WSD (weldingsuppliesdirect.co.uk).
Safety: While argon is a good fit for a variety of welding jobs, it can be a safety risk. As with any gas work, there are steps to take to prevent causing an accident. Argon is stored in high-pressure tanks, and although its inert qualities mean that it doesn’t easily react to other chemicals, it is essential to be fully trained in handling and transporting gases to minimise the risk of accidents and hazards. The risk of gas leaking or spilling needs to be taken seriously; gas should be stored in a well-ventilated room. Argon is colourless and odourless so ensuring ventilation is available and that tanks are sealed adequately is critical. Read more info on Span gas.
Helium / argon mixtures are sometimes used for their higher heat characteristics. Gas mixtures, usually 25% helium and 75% argon are sometimes used and can help to increase travel speeds when AC – gas tungsten arc welding. Mixtures of more than 25% helium for AC – gas tungsten arc welding are used, but not often, as they can tend to produce instability, under certain circumstances, in the AC arc. Pure helium or high percentages of helium (He-90%, Ar-10%) shielding gas are used primarily for gas tungsten arc machine welding with direct current electrode negative (DCEN). Often designed as seam welders, the combination of GTAW – DCEN and the high heat input from the gas used can provide fast welding speeds and outstanding penetration. This configuration is sometimes used to produce full penetration butt welds, welded from one side only, onto temporary baking with no vee-groove preparation, just a square edged plate.
Welding and cutting activities can generate gases that are hazardous to health. The gas or gases generated and their concentrations depend on the process used and the gas formation mechanisms. Gases, some of which may be hazardous, are inherent in some processes, either as a shielding gas to protect the molten weld pool against atmospheric contamination or, for flame processes, as a consumable that is burnt.
Nitrogen can be used for duplex steels to avoid nitrogen loss in the weld metal. The purity of the gas used for root protection should be at least 99.995%. When gas purging is impractical, root flux can be an alternative. In submerged-arc welding (SAW) and electro-slag welding (ESW), the shield is achieved by a welding flux, completely covering the consumable, the arc and the molten pool. The flux also stabilizes the electric arc. The flux is fused by the heat of the process, creating a molten slag cover that effectively shields the weld pool from the surrounding atmosphere.
Calibration gases are split into two categories. These are zero calibration gas and span calibration gas. Calibration gas is used to calibrate gas analyser’s. Calibration gas is in addition used to calibrate Gas detectors. These Gases will also be known as Span Gas and come in a Span Gas cylinder. This product has added one or more component(s). Source: https://www.weldingsuppliesdirect.co.uk/industrial-gas/specialist-gases.html.
Here are some tricks about welding supplies and how to make the best buying picks. MIG Welding Increases Welding Speed: In addition to welding aluminum and other softer metals, MIG-welding works faster, provides cleaner welds, and handles many different types of metals. The downside is its complexity. MIG Welders need direct currents, a steady stream of inert gas, and precise control of their torches. The amount of heat generated from MIG welding provides the deep penetration required for a strong weld, while also melting the feed wire rapidly enough to maintain a higher welding speed than other techniques. Given the inert gas required for MIG welding, keep in mind that this technique cannot be conducted in windy areas. The Right Stick Electrode Increases Welding Speed: There are three kinds of electrodes used for stick welding: fast-fill, fill-freeze, and fast-follow. While each electrode has its advantages, the fast-fill electrodes melt quickly and allow welders to work faster.
What factors should you consider when determining a budget? You may already have an estimated budget in mind. The type of welder you purchase should be suited for the specific functions you require as well as the projects you will work on the most. Think about your end goal and consider opportunities to expand the usefulness of your welder. Will you want more power or amperage in the future? It is important to take note of the varying amperage and power requirements as well as the duty cycle necessary to achieve the most effective and economical operational results for the projects you’re looking to complete. In addition to the cost of the welder itself, don’t forget to include costs for the accessories and supplies you’ll need to operate your new welder. This includes welding protection (helmet, gloves, jacket, etc.) as well as gas and consumables.
Delivery of parts to the welding station in an organized and logical fashion is also a way to reduce welding costs. For example, one company was manufacturing concrete mixing drums. In the fabrication process, the company produced 10 parts for one section, then went on to make 10 parts of another drum section, etc. As pieces came off the line, they were put onto the floor of the shop. When it was time to weld, the operator had to hunt for the pieces needed and sort through them. When the outside welding expert pointed out the amount of time being wasted in this process, the company started to batch each one on a cart. In this way, the pieces needed to weld one drum were stored together and could easily be moved to the welding area. This type of scenario is also true for companies that may outsource parts to a vendor. Though it may cost more to have parts delivered in batches, it may save more in time than having to organize and search through parts to be able to get to the welding stage. How many times each piece is handled in the shop may be an eye-opener to reducing wasted time. To measure such an intangible as this, operators are asked to put a soapstone mark on the piece each time it is touched – some companies are surprised to find out how many times a part is picked up, transported and laid down in the manufacturing process. In the case of one company, moving the welding shop closer to the heat treatment station eliminated four extra times that the part was handled. Basically, handling a part as few times as possible and creating a more efficient production line or work cell will reduce overall costs. Searching for the best MIG Welders? We recommend Welding Supplies Direct & associated company TWS Direct Ltd is an online distributor of a wide variety of welding supplies, welding equipment and welding machine. We supply plasma cutters, MIG, TIG, ARC welding machines and support consumables to the UK, Europe and North America.
Put a vent hole in anything you weld that will be sealed up completely: Put a vent hole in anything you weld that will be sealed up completely or air will heat up and expand and blow away your shielding gas or even blow out at the end of the weld bead. Some machined joints that are sealed on one end will not even allow you to start welding because the fit is so good that the part is air tight before you even weld. Other machined parts where a part is pressed in and bottomed out can give cracking problems because there is no where for the part to shrink. If you have to weld something that has been pressed in and bottomed out, make sure to add more filler metal than average to tacks and the final weld bead. That is to prevent the cracking that happens when you run a concave bead and the metal has nowhere to shrink.
Welding supplies tricks: how to become a better welder and how to select the best welding equipment. Use the smallest tungsten that will get the job done. Use the smallest tungsten to get the job done. …within reason. Another way of saying this is don’t just use a 1/8” electrode for everything. There are jobs where a 1/8” electrode is great like for welding 3/16” thick aluminum. But what if you are welding on the edge of a .030” turbine blade? A .040” electrode will be plenty to handle the 15 amps and will give much better starts than even a 1/16” electrode. Too large an electrode can cause an erratic arc and contamination…and A bad start where the high frequency tries to arc up inside the cup and off the side of the tungsten can easily melt off a thin edge and scrap an expensive part. 2% thoriated or lanthanated tungsten electrodes hold up at high amperage better than most all other electrodes. When welding at higher amperages, often times you can use one size smaller electrode by using 2% thoriated or lanthanated. And that is a good thing.
Keep in mind that heavy-duty MIG welding often produces a lot of heat, sparks and spatter, and requires a lower degree of dexterity than some other forms of welding. Therefore, using thick, stiff leather gloves that provide a higher level of protection is smart. Similarly, choose leather footwear that covers your entire foot and leaves as little room as possible for spatter to fall along your ankle line. High-top leather shoes and work boots often provide the best protection. Finally, always be sure you have adequate ventilation per OSHA recommendations and check material safety data sheets (MSDS) for each metal being welded and filler metal being used. Use a respirator whenever required by the MSDS.
The arc is shaped like a cone, with the tip at the electrode and the base on the metal being welded. The closer the electrode is held to the metal, the smaller the base of the cone — but as you pull the electrode farther away, the base (and puddle) gets larger. If the puddle gets too large, gravity will simply pull it away from the base metal, leaving a hole. This is why thin-gauge metals are especially challenging for beginners. Perhaps the most important skill needed for TIG welding is moving the torch in a controlled manner, with steady forward movement, while keeping the gap between the tip of the electrode and the base metal consistently small — usually in the range of 1/8 inch to 3/16 inch. It requires a lot of practice to precisely control the arc length, keeping it as short as you can without allowing the electrode to touch the base metal or filler rod. Source: https://www.weldingsuppliesdirect.co.uk/.
TIG welders handbook: how to become a better welder and how to select the top welding equipment. TIG Torch angle should only be around 10 degrees or less: Ideally, torch angle should only be around 10 degrees or less. Too much torch angle will deflect the heat and melt the rod before you ever get it into the puddle. This causes the rod to ball up and blob into the puddle. That’s bad. You don’t want that. You want to slip the filler rod into the puddle so that you can get a consistent bead. There are exceptions to this…like when you are using a lay wire technique and leaning the torch back while you walk the cup. But if you are dipping the rod in the puddle, too much torch angle usually is not a good thing.
Use gas lens style collet bodies and cups to weld stainless steel: Use gas lens style collet bodies and cups to weld stainless steel. The screen in the gas lens allows far better gas coverage of your welds. You can use gas lenses to weld all materials is you want; they also allow you to stick your tungsten up to 1” out of the cup by increasing gas flow. Sometimes you need to extend it just to reach a tight spot. The screen diffuses gas at higher gas flow rates eliminating turbulence which is what you would get if you tried this without the gas lens. Too much gas is as bad as too little gas. (Especially for TIG welding aluminum) Typical gas flow rates are around 15 to 20 cfh. Bu it really depends on the nozzle/cup diameter. While I am on the subject, what do the numbers on TIG cups mean? I am glad you asked… A #4 means 4/16″ or 1/4″ A #7 means 7/16″. In other words the number cup means how large the inside diameter in 1/16’s. When you use a #4 cup remember to adjust the argon flow to around 10cfh. And the bigger the cup inside diameter, the more gas flow….to an extent.
Make sure everything is ‘squeaky’ clean. TIG welding is not tolerant of any contaminants. Be sure to clean your base metal with a good degreaser, BEFORE you scrub it with a dedicated wire brush. Do not use the same brush on different kinds of metal. Wipe the filler rod down with degreaser, too. Get comfortable. Whenever possible, I like to be seated when I’m welding. Even in situations where sitting isn’t possible, any little adjustments to my stance or body position that make me more comfortable will have a noticeable effect on the weld.
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Contact tips can have a significant impact on MIG welding performance since this consumable is responsible for transferring the welding current to the wire as it passes through the bore, creating the arc. The position of the contact tip within the nozzle, referred to as the contact tip recess, is just as important. The correct contact recess position can reduce excessive spatter, porosity, insufficient penetration, and burn-through or warping on thinner materials. While the ideal contact tip recess position varies according to the application, a general rule of thumb is that as the current increases, the recess should also increase.