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Grooved Seam Joint

From DT Online

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Description

Grooved Seam are a type of self-locking joint used commonly in the fabrication of cylindrical and conical objects. The Seam can be on the outside or on the inside. 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: up to 4 times the material thickness may also need to be added for thicker sheet materials)..


Making a Grooved Seam
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  • When locking a Grooved Seam on the outside of a cylinder or conical object, the workpiece can be supported on a Mandrel Stake, Triblet, Anvil or Funnel Stake.
  • Grooved Seams on the inside of cylinders and cones can be supported by a rail extending out of the side of the Vice with a suitable groove cut along its top surface (alternatively, a temporary rail can be created by clamping together three steel strips and setting the middle one down a little to form the centre groove).


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Cap Strip Seam

A Cap Strip (aka Drive Slip) can be used to draw together two halves of a joint to make a Double Groove Joint. It is a method often used to assemble air-conditioning and heating ducts.


A similar strip can be used to create a Locked Corner Seam which is useful for the assembly of rectangular shapes.


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Standing Seam

A Standing Seam is similar to a Grooved Seam which has not been completely folded over. They are used for joining metals where extra stiffness is needed, such as roof coverings and ventilation ducting.


DT Online Buyers' Guide
Thor 114 Rawhide Mallet Size 3 Emir 86 Tinsmans Mallet 50mm Kreator Professional Quality Graphite Shaft Machinist Hammer 300g KRT901201 Gilbow G69 Right Hand Universal Tin Snip 11-inch Gilbow G67 Left Hand Universal Tin Snip 11-inch CLARKE METALWORK METAL FOLDER BENCH/VICE MOUNTED PANEL FLANGING / JOGGLER & 5mm HOLE PUNCH TOOL Extra Large Solid Steel Bench Block 6 Draper 35481 4.5KG Anvil Single Bick (Cast Iron) CLARKE SPOT WELDER 230v 13Kw MILD STEEL 2mm + 2mm CSW13T
Thor 114 Rawhide Mallet Size 3 Emir 86 Tinsmans Mallet 50mm Fiberglass Shaft Machinist Hammer 300g KRT901201 Gilbow G69 Right Hand Universal Tin Snip 11-inch Gilbow G67 Left Hand Universal Tin Snip 11-inch Bench/Vice Mounted Sheet Folder Panel Flanging/Joggler Tool & 5mm Hole Punch Extra Large Solid Steel Bench Block 6" x 4" x 3/4" Draper 35481 4.5KG Anvil Single Bick (Cast Iron) Clarke Spot Welder 230V 13kW