Heel Line In Sheet Metal

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.

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. Fabricating precision sheet metal aircraft parts. Point to draw the line tilting the tool slightly in the direction of movement figure 13 1. Air bending one of the three types of bending for sheet metal where the outside mold line is not pressed against the die.

Using wood you eliminate one of those hard points so the metal can move without stretching. Whatever you want to call it. 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. 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.

This is a specialty of mine so this section will be fairly extensive. This page also includes a link to a on line calculator. A common mistake the length of the throat and heel is radius x 1 57. Fhe ends of the box are closed off by separate end panels 5 which are spot welded or otherwise secured to walls 3 and i4.

Mark your width of the fittings on both ends and draw a straight line. The best is to use heat a wood hammer and a dolly. Shrinking metal is a special technique and there are many ways to do it. The following illustration shows the equation calculation for determining the bend line to mold allowance when forming sheet metal.

Laying out the throat and heel. Some of the methods of measuring marking. This chapter introduces you to basic sheet metal and fiberglass ductwork fabrication. You will be introduced to the tools needed to work the sheet metal.

Most sheet metal materials will conform to the calculations. 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. 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. Bend line shift bls the distance from the outside mold line to the original bend line on the flat pattern.

This is used to calculate the back stop location when working off of a flat pattern. Any time you hit sheet metal with steel hammer against a steel dolly it stretches.