Seam Joint In Sheet Metal

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.

Seam joint in sheet metal.

The grooved seam joint fig. Up to 4 times the material thickness may also need to be added for thicker. 2 57 is one of the most widely used methods for joining light and medium gauge sheet metal. It is used to join different material and sheet thickness parts.

This seam is similar to the slip expansion seam. Where as the slip expansion lock is formed by braking a sheet of copper the lock on this seam is formed by soldering a small strip of copper below the sheet. This increases productivity while keeping each seam consistently formed on multiple pieces of duct. Joints the grooved seam joint fig.

Grooved seam are a type of self locking joint used commonly in the fabrication of cylindrical and conical objects. In sheet metal shops a rollforming machine is used to fold the pittsburgh seam on one end of a piece of ductwork for example. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. 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.

It consists of two folded edges that are locked together with a hand groover fig. The seam can be on the outside or on the inside. The difference is in forming the lock. Clinching joint is a type of permanent sheet metal joining operation that involves joining sheet metal parts using cold forming operation.

Sheet metal clinching joint creates a button type positive connection between two or three layers of sheet metal. The type of seam used depends largely on the application. A variety of seams are used to connect pieces of sheet metal in construction auto body creation and fine art sculpture. When making a grooved seam on a cylinder you fit the piece over a stake and lock it with the hand groover fig.

A pittsburgh lock consists of three bends that form an extended s shape which creates an airtight seal after completion. When making a grooved seam on a cylinder you fit the piece over a stake and lock it with the hand groover fig. 2 57 is one of the most widely used methods for joining light and medium gauge sheet metal. In the above content we introduced various joining methods of sheet metal.

Directly melt the local sheet metal material at the welding head to complete the sheet metal connection. Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance.