nccer unit 11- welding level 1. a _____________ is made in a opening in a part or between two...

SMAW- GROOVE WELDS NCCER Unit 11- Welding Level 1

GROOVE WELDS A _____________ is made in a opening in a part or between two parts.

They can be made in any position on all five of the basic types of weld joints.

Can include the square, V, U, bevel, J, flare V, and flare bevel.

Typically use ____________ or a torch to prepare the bevel on a weld coupon.

Beveling serves two purposes…. __________ the metal Creates a greater space for metal to fill

GROOVE WELD TERMS Bevel angle- angle formed between the edge of a piece of metal and the

surface

_______________- the distance the joint preparation extends into the base metal

Groove angle- the total angle between the groove face

_______________- any surface in a weld groove prior to welding

Root opening- the separation between the members to be joined at the root of the joint.

BACKINGS Single groove welds with backing are used for __________________, high

quality welds.

Backing also makes welding the _____________ easier… these are often called root reinforcements.

Thick metal pieces that have to be joined must be beveled so that the weld will penetrate the full thickness.

PREPARING BACKING STRIPS Weld coupons should be ________ inch thick carbon steel to meet AWS test

requirements.

Always clean the steel prior to welding by using a _________________ or grinder.

Always cut your backing strips at least _____ wide by ___ long.

Once the backing strips are cut, clamp it to the weld coupon and ensure that the root opening is at least____ inch wide.

V-GROOVE WELDS WITH BACKING The V-groove with backing is a common groove weld normally made with

_______ hydrogen electrodes.

The V-groove with steel backing is also the standard AWS qualification test for plate welding.

The most common test is the limited-thickness qualification (up to ¾”) which requires the use of _______ carbon steel plate and welding with low hydrogen electrodes.

GROOVE WELD POSITIONS Groove welds can be made in _____ positions.

Weld position is determined by the weld and the orientation of the work piece.

In the 1G and 2G positions, the weld axis can be inclined up to ______ degrees.

FLAT V-GROOVE WELDS (1G) Always use ________ electrodes.

If using weave beads, keep the electrode at a ___ degree work angle and a ____ to ____ degree drag angle.

If using a __________ bead, use a 10 to 15 degree drag angle.

When finished, never cool test coupons with ________. This can cause ____________ and affect the mechanical properties of the base metal.

HORIZONTAL WELDS (2G) Horizontal welds can be made with or without backing.

Drag angle should be ___ to _____ degrees and work angle should be 0 degrees.

Always pay attention to the termination of the weld to fill in the crater.

VERTICAL WELDS (3G) Can also be made with or without backing.

Set the amps in the _________ part of the range for better puddle control.

The electrode should be at a ___ to ____ degree push angle with a 0 degree work angle.