Double Seam Joint In Sheet Metal

Up to 4 times the material thickness may also need to be added for thicker.

Double seam joint in sheet metal.

The double seam is also called acme lock hammer lock and pipe lock in the sheet metal trade. The extra material allowance for a grooved seam is 3 times the width w of the seam one half of this amount being added to each edge note. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. A variety of seams are used to connect pieces of sheet metal in construction auto body creation and fine art sculpture.

Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance. Some seams are created entirely by machine or in a metal shop while others are made to snap together without requiring welding or soldering on site. Multiply 1 8 by 2 1 2 and your answer will be 5 16 inch which you will allow when laying out sheet metal for making the wire edge. Grooved seam are a type of self locking joint used commonly in the fabrication of cylindrical and conical objects.

The grooved seam joint fig. The seam can be on the outside or on the inside. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials.