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Radio-frequency welding, also known as dielectric welding and high-frequency welding, is a plastic welding process that utilizes high-frequency electric fields to induce heating and melting of thermoplastic base materials. [1] The electric field is applied by a pair of electrodes after the parts being joined are clamped together.
American Welding Society ATFs are listed on the official AWS website and advertised in the American Welding Society's Welding Journal magazine. The ATF program requires that a facility implements a quality assurance program that meets the requirements established in the AWS QC4-89, Standard for the Accreditation of Testing Facilities. [ 5 ]
As with all welding processes, the proper electrode must be chosen to obtain the required mechanical properties. Operator skill is a major factor as improper electrode manipulation or machine setup can cause porosity. Flux-cored arc welding machine. Another type of FCAW uses a shielding gas that must be supplied by an external source.
Shielded metal arc welding process, showing slag. Welding flux is a combination of carbonate and silicate materials used in welding processes to shield the weld from atmospheric gases. When the heat of the weld zone reaches the flux, the flux melts and outgasses.
Map of Golden Triangle Tiny Jewel Box storefront on Connecticut Avenue. The Golden Triangle is a neighborhood and business improvement district (BID) in Washington, D.C. Covering 43 blocks, it encompasses the western part of Washington's central business district, running from the front yard of the White House's north side to Dupont Circle and from 16th Street NW to 21st Street NW and ...
ACORN announced it was closing its remaining state chapters and disbanding. [10] On November 2, 2010, its U.S. offices filed for Chapter 7 liquidation effectively closing the organization. [11] ACORN members and organizers formed new organizations in at least three states [12] [13] [7] while ACORN groups outside of the US continued unaffected ...