Engineers must not only consider design and material requirements, but also should take the actual welding process into account. Part positioning and welding procedures affect weld quality. Designers must compensate for distortions induced by welding. And once the parts are welded, they must be inspected. The quality of welds is ultimately the designer's responsibility. Use jigs, fixtures, and positioners: Jigs and fixtures hold parts in correct alignment for welding. Fabrication shops may have suitable ones available, but when designers and manufacturing engineers have to specify new ones, this cost must be included in the cost of welding. Motorized positioning equipment can turn massive components to position them for welding. If such equipment is available, workers must mount the components on the equipment and make sure that it is properly aligned before welding. The time this takes must be compared to the welding time involved. If mounting time equals or exceeds the welding time saved, it is better to choose a welding process that will operate in the position the structure is already in. Welding position is important. Thoughtful designers can arrange to have most welding done flat, so processes such as submerged-arc welding can be used. Flat-position welding is easier for welders, yields better quality, and improves production rates. Other positions limit the processes that can be used. The lack of access also makes inspection more difficult, and both quality and productivity are likely to suffer. Ideal welding procedures are those that produce acceptable-quality welds at the lowest overall cost. The procedures should be tailored to the application and should spell out exactly what welds are to be made and how they are to be made. Procedure variables include the welding process, conditions, and operation details; joint details; filler metal and shielding gas (if any), and safety. Different procedures produce different
Products & Services
Plasma Welding Machines
Plasma welding equipment melt areas with an arc and then use a high-velocity, high-temperature ionized gas to make welds.
Welding and Fabrication Services
Welding and fabrication services provide customized metal forming and processing, typically on a contract basis. Capabilities are usually not limited to welding and fabrication, and may include design consulting, on-site operations, prototyping, and other useful industrial procedures.
Welding accessories includes products used in, or related to, processes such as MIG, TIG and resistance.
Laser Welding Services
Laser welding services use high-powered laser welding equipment to fuse materials together.
Malish Plastic's Extrusion tooling is usually much more cost effective than tooling for other plastics operations. Dependent on the material, size of the extrudite, level of dimensional tolerance, and...
Topics of Interest
R GUDMUNDSON, Air Liquide Gas AB, Sweden
MIG welding is used both in manual and automatic operations. Automation includes equipment especially built for specific workpieces or...
17.1 Welding Cost Calculations
The choice of a particular welding process is usually made on cost as well as technical terms. Technical limitations can be such as the type of material, its...
Fiber lasers have now matured into exceptionally reliable and stable industrial tools. These lasers have unique capabilities that enable a wide range of high quality micro-machining processes; of...
Flanged End Connections
Flanged valves are perhaps the most widely used. Flanges used to mate valves with adjacent piping and/or equipment must conform to the following:
They must provide sufficient...
A welding process that's been around for years proves to be more versatile and economical than other conventional methods Friction welding is the process of rubbing two components together at a...