2. to weaken or destroy the impact or effectiveness of; undermine. 3. to offer goods or services at a lower price or rate than (a competitor). 4. to cut away material from so as to leave a portion overhanging, as in carving or sculpture. 5. to hit (a ball) underhand so as to cause backspin; slice. 6. to cut a notch in (a tree) in order to control the direction in which the tree is to fall.
http://www.thefreedictionary.com/undercut
To diminish or destroy the province or effectiveness of; undermine: The partnership between the United States and Western Europe is undercut by diverging economic interests (Scott Sullivan). 2. To sell at a lower price than or to work for lower wages or fees than (a competitor).
http://www.thefreedictionary.com/undercut
Note that the maximum allowable. undercut for qualifying procedures, welders, welding operators, and tack welders was revised to. 1/32 in. maximum in AWS D1.1-88.
https://app.aws.org/technical/interps/d1-88-001.pdf
AWS D1.1, Structural Welding Code—Steel, is prepared by the AWS Structural Welding Committee. Because the Code is written in the. form of a specification, it cannot present background material or discuss the committee’s intent.
https://app.aws.org/technical/interps/d1-88-001.pdf
6 However, as the arc voltage is raised to excessive levels, undercutting may again appear. This is particularly true in spray arc welding. When the arc becomes very long, it also becomes too wide. This results in an increased amount of base material being melted. However, the heat transfer of a long arc is relatively poor, so actually the arc is supplying no more total heat to the weld zone.
http://www.esabna.com/euweb/mig_handbook/592mig10_6.htm
AWS D1.1, Structural Welding Code—Steel, is prepared by the AWS Structural Welding Committee. form of a specification, it cannot present background material or discuss the committee’s intent. and other that appear to be overly conservative. sufficient latitude for the exercise of engineering judgment.
https://app.aws.org/technical/interps/d1-88-001.pdf
Check out the Welded Metal Sculptures from Eclectic Metals. Click here. UNDERCUT AND UNDERFILL. There have been questions posed regarding one of the questions on the CWI exam. A weld replica is provided with an underfilled joint in which the edge of the base metal is undercut. Here are my ideas on this without going through all the AWS definitions, Charts etc. Feel free to contact me with any information to straighten me out and provide others with information.
http://weldingdata.com/undercutunderfill.htm
5 UNDERCUTTING As shown in Figure 10-3, undercutting is a defect that appears as a groove in the parent metal directly along the edges of the weld. It is most common in lap fillet welds, but can also be encountered in fillet and butt joints. This type of defect is most commonly caused by improper welding parameters; particularly the travel speed and arc voltage.
http://www.esabna.com/euweb/mig_handbook/592mig10_5.htm
Undercut designs are often used to create threaded parts, such as screw-on bottle caps, snap-on products such as lipstick containers, and a variety of consumer, medical, automotive, and other products.
http://www.thefreedictionary.com/undercut
When the travel speed is too high, the weld bead will be very peaked because of its extremely fast solidification. The forces of surface tension have drawn the molten metal along the edges of the weld bead and piled it up along the center. Melted portions of the base plate are affected in the same way.
http://www.esabna.com/euweb/mig_handbook/592mig10_5.htm
welding definition undercut
Undercut is the loss of base metal caused by welding.