Fastening Metal Flexible Manufacturing Copyright Texas Education Agency

Fastening Metal Flexible Manufacturing

Copyright © Texas Education Agency, 2017. These Materials are copyrighted © and trademarked ™ as the property of the Texas Education Agency (TEA) and may not be reproduced without the express written permission of TEA, except under the following conditions: 1) Texas public school districts, charter schools, and Education Service Centers may reproduce and use copies of the Materials and Related Materials for the districts’ and schools’ educational use without obtaining permission from TEA. 2) Residents of the state of Texas may reproduce and use copies of the Materials and Related Materials for individual personal use only, without obtaining written permission of TEA. 3) Any portion reproduced must be reproduced in its entirety and remain unedited, unaltered and unchanged in any way. 4) No monetary charge can be made for the reproduced materials or any document containing them; however, a reasonable charge to cover only the cost of reproduction and distribution may be charged. Private entities or persons located in Texas that are not Texas public school districts, Texas Education Service Centers, or Texas charter schools or any entity, whether public or private, educational or non-educational, located outside the state of Texas MUST obtain written approval from TEA and will be required to enter into a license agreement that may involve the payment of a licensing fee or a royalty. For information contact: Office of Copyrights, Trademarks, License Agreements, and Royalties, Texas Education Agency, 1701 N. Congress Ave. , Austin, TX 78701 -1494; phone 512 -463 -7004; email: copyrights@tea. state. tx. us. Copyright © Texas Education Agency, 2017. All rights reserved. 2

Basic Welding Symbols Copyright © Texas Education Agency, 2017. All rights reserved. 3

Basic Welding Symbols > American Welding Society developed the following set of symbols to be used on plans. > This is a basic explanation of the many types of symbols used in welding. Copyright © Texas Education Agency, 2017. All rights reserved. 4

Basic Welding Symbols Reference line is a horizontal line where all welding information is placed. Arrow is the other required part of the symbol. It points to the location of the weld. Copyright © Texas Education Agency, 2017. All rights reserved. 5

Basic Welding Symbols Bead Fillet Plug or Slot Butt or Groove Square V Bevel U J C Build up Edges on in in hole left surface corner square Weld all the around Both edges cut to an angle One edge cut to an angle Both edges cut to a concave One edge cut to a concave Weld in the field Copyright © Texas Education Agency, 2017. All rights reserved. 6

Basic Welding Symbols The location of the weld type symbol on the reference line indicates the side of the part to be welded. Symbol on the bottom of the reference line indicates the weld is on the same side as the arrow. Symbol on the top of the reference line indicates the weld is on the opposite side. Symbols on both sides of the reference line indicates the weld is on both sides of the joint. Copyright © Texas Education Agency, 2017. All rights reserved. 7

What Does This Symbol Mean? Copyright © Texas Education Agency, 2017. All rights reserved.

What Do These Symbols Mean? Copyright © Texas Education Agency, 2017. All rights reserved.

Sheet Metal Seams LAP SEAM INSIDE CORNER LAP SEAM STANDING GROOVE SEAM OUTSIDE CORNER

Seams are lines of junction between two metal plates. They form a joint. The grooved seams form a self-locking joint. They do not need any extra fasteners to hold them together. Copyright © Texas Education Agency, 2017. All rights reserved. 12

Types of Seams LAP SEAM This seam is two pieces of sheet metal laid

Outside Corner Lap Seam This seam is one piece of metal bent to a 90 degree angle with a second piece of metal fastened to the inside of the angle. Copyright © Texas Education Agency, 2017. All rights reserved. 14

Inside Corner Lap Seam This seam is one piece of metal bent to a 90 degree angle with a second piece of metal fastened to the outside of the angle. Copyright © Texas Education Agency, 2017. All rights reserved. 15

Standing Groove Seam This seam is made by folding the edge of two pieces of sheet metal over onto itself. These two lips of metal are then slipped together. A hand groover is used to lock the joint or seam together. Copyright © Texas Education Agency, 2017. All rights reserved. 16

A Sheet Metal Seam Groover Seam groovers are made in different groove widths to

Single Bottom Seam This seam is made by folding the bottom edge over itself. The side lip is folded to 90 degrees and then slipped into the bottom lip. The two lips are hammered down to close the seam. Copyright © Texas Education Agency, 2017. All rights reserved. 18

1 9 COUNTERSUNK SEAM This seam is opposite the standing groove seam. The grooving is done to the back side making the seam flat. The lips are inserted into each other and a groover is used to lock the seam. Copyright © Texas Education Agency, 2012. All rights reserved. Copyright © Texas Education Agency, 2017. All rights reserved. 19

Fastened Sheet Metal Seam Fastened sheet metal seams can be done in different ways: > resistance (spot) welding > mechanical fasteners ( screws or pop rivets) > seams that lock together (standing groove seam) Copyright © Texas Education Agency, 2017. All rights reserved. 20