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In welding, undercutting is when the weld reduces the cross-sectional thickness of the base metal. This type of defect reduces the strength of the weld and workpieces. One reason for this defect is excessive current, causing the edges of the joint to melt and drain into the weld; this leaves a drain-like impression along the length of the weld.
The company was founded in 1895 by John C. Lincoln with an investment of $200 to make electric motors he had designed. [3]The company is headquartered in Euclid, Ohio, and has 44 manufacturing locations, including operations and joint ventures in 19 countries and an international network of distributors and sales offices covering more than 160 countries.
Gas tungsten arc welding (GTAW), or tungsten/inert-gas (TIG) welding, is a manual welding process that uses a non-consumable electrode made of tungsten, an inert or semi-inert gas mixture, and a separate filler material. Especially useful for welding thin materials, this method is characterized by a stable arc and high quality welds, but it ...
Spot welding is a resistance welding method used to join two or more overlapping metal sheets, studs, projections, electrical wiring hangers, some heat exchanger fins, and some tubing. Usually power sources and welding equipment are sized to the specific thickness and material being welded together.
Photokeratitis or ultraviolet keratitis is a painful eye condition caused by exposure of insufficiently protected eyes to the ultraviolet (UV) rays from either natural (e.g. intense direct or reflected sunlight) or artificial (e.g. the electric arc during welding) sources. Photokeratitis is akin to a sunburn of the cornea and conjunctiva.
The cost of materials includes the cost of the base and filler material, and the cost of shielding gases. Finally, energy cost depends on arc time and welding power demand. [78] For manual welding methods, labor costs generally make up the vast majority of the total cost. As a result, many cost-saving measures are focused on minimizing ...
The Lincoln Zephyr V12 was a 75° V12 engine introduced by Ford Motor Company's Lincoln division for the Lincoln-Zephyr in 1932. Originally displacing 267 cubic inches (4.38 L), it was also manufactured in 292 cubic inches (4.79 L) and 306 cubic inches (5.01 L) displacements between 1940 and 1948.
The ARCA Truck Series was a pickup truck racing series which ran on numerous short tracks throughout the American Midwest, running in Indiana, Ohio, Pennsylvania, Kentucky and Michigan.