Lobster Back Bend Sheet Metal

Calculation flat pattern used as a template for cutting the pipe producing with wall thickness s 0.

Lobster back bend sheet metal.

Duct size remains constant between inlet and outlet. As with all standard lobster back bends the start and finish segments are basically a normal segment cut in half. We start off by modeling sheet metal cylinder diameter same as required duct diameter. From 2 to 10 gores permitted.

Ducts have circular cross sectional shape. Generally a template is produced from an orthographic drawing when small quantities are required larger quantities may justify the use of press tools and the template will include allowances for bending and seams bearing in mind the thickness of material used. Many articles such as cans pipes elbows boxes ducting hoppers etc. These can be light sheet metal or manufactured from thick plate.

One type of industrial component i have been involved with the design and manufacture of is lobster back bends. Calculator will calculate the necessary dimensions for the construction flat pattern segments lobsterback bend elbow tee piece frustum cone and truncated pipe truncated cone with an accessible vertex and triangulation method. It depends how much material frame cut forming welding cost in your shop. This type of duct bend is made up of segments cut from flat sheets or plates rolled into cylindrical parts then assembled.

Technical description lobster provides a multi gored bend between two ducts. The lobster software module is for the development of tapered segmental bends commonly known as lobster back bends in sheet and plate. Are manufactured from thin sheet materials. On light gauge sheet metal you could bend by hand after rolling.

The location of the segment seam see image of finished bend assists the fabricator in lining up the parts to assemble the bend.