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| SearchWeb.Today Free Internet Web Directory » Business » Construction and Maintenance Industrial Fabric Covered Buildings Compost & waste management with less odor, Milestones fabric buildings provide covered waste storage, optimum decomposition & no runoff to wetlands. Milestones fabric covered buildings for waste recycling, material recovery, recycle & reuse operations, corrosion resistant buildings, control odor, halt run-off. https://mbdbuildings.com/ - Details
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https://www.weldingsuppliesdirect.co.uk/welding-equipment/spot-welding.html Spot welding is one of the oldest welding processes. It is used in a wide range of industries but notably for the assembly of sheet steel vehicle bodies. This is a type of resistance welding where the spot welds are made at regular intervals on overlapping sheets of metal. Spot welding is primarily used for joining parts that are normally up to 3 mm in thickness. Thickness of the parts to be welded should be equal or the ratio of thickness should be less than 3:1. The strength of the joint depends on the number and size of the welds. Spot-weld diameters range from 3 mm to 12.5 mm.
How spot welding works
Spot welding is one form of resistance welding, which is a method of welding two or more metal sheets together without using any filler material by applying pressure and heat to the area to be welded. The process is used for joining sheet materials and uses shaped copper alloy electrodes to apply pressure and convey the electrical current through the workpieces. In all forms of resistance welding, the parts are locally heated. The material between the electrodes yields and is squeezed together. It then melts, destroying the interface between the parts. The current is switched off and the "nugget" of molten materials solidifies forming the joint.
To create heat, copper electrodes pass an electric current through the workpieces. The heat generated depends on the electrical resistance and thermal conductivity of the metal, and the time that the current is applied. The heat generated is expressed by the equation: E=I2*R*t
where E is the heat energy, I is the current, R is the electrical resistance and t is the time that the current is applied.
Copper is used for electrodes because it has a low resistance and high thermal conductivity compared to most metals. This ensures that the heat is generated in the workpieces instead of the electrodes.
Materials suitable for spot welding
Steel has a higher electrical resistivity and lower thermal conductivity than the copper electrodes, making welding relatively easy. Low carbon steel is most suitable for spot welding. Higher carbon content or alloy steel tend to form hard welds that are brittle and could crack. Aluminium has an electrical resistivity and thermal conductivity that is closer to that of copper. However, aluminium's melting point is much lower than that of copper, making welding possible. Higher levels of current must be used for welding aluminium because of its low resistivity.
Galvanized steel (i.e. steel coated with zinc to prevent corrosion) requires a different welding approach than uncoated steel. The zinc coating must first be melted off before the steel is joined. Zinc has a low melting point, so a pulse of current before welding will accomplish this. During the weld, the zinc can combine with the steel and lower its resistivity. Therefore, higher levels of current are required to weld galvanized steel. https://www.weldingsuppliesdirect.co.uk/welding-equipment/spot-welding.html - Details
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Fire Door Inspections UK At Staines Fire Solutions we offer a professional and independent fire door inspection services that are independent. Our certified fire door inspectors are fully qualified to carry out the assessments in HMO, private and business properties. They prepare detailed reports on the safety of the fire doors at your premises. Staines safety services provide access to drone services company that specialises in aerial photography and video. This can be carried out for real estate and construction inspections. The drones provide thermal imagery, data visualization and forecasting to provide fire risk prevention assessments. We provide full fire extinguisher service from product supply to installations and training on how to use them in case of emergencies. At Staines Safety Services we can assist your business with fire extinguisher services in the local areas of Middlesbrough, York, Newcastle or London, as well as the rest of the UK. https://www.stainessafetyservices.co.uk/ - Details
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ECU Remap Berkshire Car Service Reading – Scheduling Your Car’s ‘Scheduled Maintenance’Of course, there’s every possibility that your schedule is a bit too hectic and you’re busy with work, or just cannot afford to drop the car off for a service because you’re afraid it might just take too long. If you’re worried about Oil Change Sevice Tilehurst or any of these things, just remember that without periodic service, you’re putting the continued reliability of your car’s performance at risk. The old saying goes, “if it ain’t broke, don’t fix it” and that is true to some extent, but if you do hear the odd whirr, thud or bump while driving, it’s best to drop your car in for a service. You never know, that tiny niggle may just grow to be a major and very expensive inconvenience in the very near future. If time is a constraint, contact your local service centre or dealer and ask how long it would take if it’s just a periodic service. If there’s a problem, book an appointment to go and show them the vehicle. Depending on what car you drive, they may even visit you to survey the car’s needs. If not, drop off your car and take a cab to work supplied by our sister company 1st Class Cars. if it’s just the matter of a day or two. https://www.mot-centre.com/ - Details
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Floor and wall tiles and mosaics Philippines Tile Express Shop is a direct importer and retailer of floor and wall tiles, mosaics, subway tiles, sanitary ware and accessories in the Philippines. With more than a decade of experience in the market, and branches all over the country, our branches are constantly evolving with new design ideas to showcase our extensive line of products, as well as enlighten clients on international trends and tile technologies. Our strong inventory power, designer collections, dedicated customer service, and industry savvy team who are qualified at predicting and experimenting with international tile trends are the key strengths of our brand. These have helped maintain our good relationship with architects, contractors, designers, dealers and customers throughout the years.
Our approach is to focus on series collections that educate clients, as well as satisfy their taste and tile needs. We have an honest approach to customer service, and make sure to understand clients’ design and budget requirements, providing them with products that are of high quality that will make them proud to have in their space. We encourage you to drop by in one of our several showrooms, to experience our collections, and be inspired to bring your design vision to reality. https://tileexpressshop.com/ - Details
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Welding Fume Extraction Ireland A welder is a long term investment where many find that they get what they pay for. While it is sometimes advisable to test the waters with an used model, picking the right machine the first time around can save a lot of headaches and cash in the long term. No one wants an used welder to fail in the middle of a big job or to discover that an used welder's price can help make ends meet but the welder itself can't make two pieces of metal meet. The best welder will complete every project that comes down the pike and minimizes limitations. This means that the most expensive welder is not always the best for each situation. However, the cheapest welding machine that can't handle every job a welder hopes to accomplish fails to pay for itself in ways that make it worthwhile to review the possible options before investing in a welder. The Work Determines the Welder One of the most important questions to consider when selecting a welder isn't what projects it will be used for in the next week, month, or even year. Those interested in buying a welder need to ask if they see themselves using it more frequently in the future for many different kinds of projects.
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. Looking for the best TIG 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.
And another tip is use the old school type of collet body(not gas lens) and one size smaller cup than you would use for steel that still provides good shielding. A smaller old school (not gas lens) TIG cup confines the shielding gas envelope to the puddle so that arc energy is not wasted in the form of frosty cleaning action outside the weld. A lot of Old timers use the small cups, they just don't know why. Pay attention next time you weld aluminum and use a small cup and then turn the shielding gas flow down to around 12-15 cfh with a #6 cup and see if things don't quiet down a bit.
Several MIG welders handbook: how to become a better welder and how to pick the best welding equipment. How do I choose what size Tig Welding Rod should I use for the job? For sheet metal up to 1/8" thick, don't use a welding rod that is bigger than the thickness of metal you are welding.at least not much bigger. A good example.is using a 3/32 rod for welding .040 metal. That will just give you a fit. The amperage is low and the weld puddle needs to be small in order to prevent blowing a hole.and then when you dip the rod into the puddle, the rod is a big heat sink and sucks the heat right out of the puddle making it hard to maintain a consistent size bead. But Beginners should probably not be practicing on really thin metal. If you are a beginner you should be practicing on around 1/8 " thick metal, and the bigger the rod, the easier it is to feed. For 1/8 " metal, Use larger diameter rods (3/32" to 1/8") So here is the rule..thin metal, use a thin rod Thick metal, use a thicker rod. This might seem like a no brainer, but I have answered a lot of questions like this about the rod melting before it gets to the puddle. If torch angle and arc length are right, its usually the rod size. https://www.weldingsuppliesdirect.ie/ - Details
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