Heel Line In Sheet Metal

Bending is a manufacturing process that produces a v shape u shape or channel shape along a straight axis in ductile materials most commonly sheet metal.

Heel line in sheet metal.

Shrinking metal is a special technique and there are many ways to do it. For short lines use the steel scale as a guide. The best is to use heat a wood hammer and a dolly. This chapter introduces you to basic sheet metal and fiberglass ductwork fabrication.

So in a part generated with the sheet metal tools your bend lines are stored in the flat pattern feature remember that this sketch you can show hide and suppress unsuppress to control how when it is displayed. A common mistake the length of the throat and heel is radius x 1 57. Body ii in this instance is formed from a sheet metal blank which is bent to provide a bottom l2 and upstanding front and rear walls l3 4 respectively. The following illustration shows the equation calculation for determining the bend line to mold allowance when forming sheet metal.

Mark your width of the fittings on both ends and draw a straight line. Most sheet metal materials will conform to the calculations. Fabricating precision sheet metal aircraft parts. Any time you hit sheet metal with steel hammer against a steel dolly it stretches.

Air bending one of the three types of bending for sheet metal where the outside mold line is not pressed against the die. Laying out the throat and heel. Laying out the heel and throat is pretty basic however you must take the length of your flat cheek pattern and not the length of the offset pattern. Using wood you eliminate one of those hard points so the metal can move without stretching.

Whatever you want to call it. This page also includes a link to a on line calculator. The file is formed of relatively light gauge sheet metal and comprises a main body or box it and a hinged cover ll. This is used to calculate the back stop location when working off of a flat pattern.

To think about bending a sheet of metal that has appreciable thickness focus on an imaginary central sheet the so called neutral line or neutral axis within the thickness. This is a specialty of mine so this section will be fairly extensive. You may be thinking that a preceptor pup is a rag and tube airplane and the sheet metal work makes up a very small portion of the airplane but when you take that innocent piece of sheet metal and try to put a bend in it things can get complicated in a hurry. You will be introduced to the tools needed to work the sheet metal.

Some of the methods of measuring marking. Commonly used equipment include box and pan brakes brake presses and other specialized machine presses typical products that are made like this are boxes such as electrical enclosures and rectangular ductwork.