Table of Contents
What is a grooved seam?
A seam in which the edges of two metal sheets are bent approximately 180°, inserted in each other, flattened, and then locked by pressure.
What is the groove seam allowance?
The allowance for a grooved seam is three times the width (W in fig. 2-68) of the lock, one half of this amount being added to each edge. For example, if you are to have a 1/4-inch grooved seam, 3 x 1/4 = 3/4 inch, or the total allowance; 1/2 of 3/4 inch = 3/8 inch, or the allowance that you are to add to each edge.
What are the types of seams?
7 Different Types of Seams
- Plain seam. A plain seam is the simplest type of seam and can be used on almost any item.
- Double-stitched seam.
- French seam.
- Bound seam.
- Flat-felled seam.
- Welt seam.
- Lapped seam.
How many seams are there?
Seams are classified according to the type/number of components used. There are eight classes of seams defined as per ISO 4916:1991. In the past, seams were described as Flat, Superimposed, Lapped or Bound. Stitching (then differentiated from seams) were described as Edge finishing or ornamental.
What is the material used to manufacture rivets?
Aluminum. Known for being soft and lightweight, aluminum continues to be one of the most common material choices for rivets and fasteners. Aluminum provides strong corrosion resistance and is ideal for many applications.
What is the use of groove in sheet metal?
V Grooving creates decorative grooves, channels and shadow gaps. V-Grooving allows for sharp bends to be created from sheet material creating profiles that give the appearance of a solid material.
How do you make a wired edge?
Form a length of wire to suit the perimeter of the finished edge and tucked it into the previously formed channel. Lie the workpiece with its top edge face down on a Creasing Iron, Bench Block or similar surface and tuck the edge of metal down on to the wire with a Peening Hammer to complete the edge.
What products are made from sheet metal?
Sheet metal is used in automobile and truck (lorry) bodies, airplane fuselages and wings, medical tables, roofs for buildings (architecture), and many other applications.
How are grooved seams made in metal work?
The grooved seam process is similar to the folded seam process; it involves connecting two folded edges, usually made with a machine, which are interlocked and pressure-tightened to make the seam. Manual grooved seams are pounded with a mallet to finish, with no soldering required.
How much material do you need for grooved seams?
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) .. Mark out half the width of the Seam on each end of the piece to be joined.
How are grooved seams used in the fabrication of cylindrical shapes?
GROOVED SEAMS are useful in the fabrication of cylindrical shapes. There are two types of grooved seams-the outside grooved seam and the inside grooved seam (fig. 2-68). The allowance for a grooved seam is three times the width (W in fig. 2-68) of the lock, one half of this amount being added to each edge.
When to use a standing seam or grooved seam?
A similar strip can be used to create a Locked Corner Seam which is useful for the assembly of rectangular shapes. 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.