CE 331, Fall Truss Design Example 1 / 8 Design a typical steel truss girder to support the roof of the office building shown below. Countless everyday objects are fabricated from sheet metal. The K- Factor in sheet metal working is the ratio of the neutral axis to the material thickness. Sheet thickness ( in) : K- factor: Yield strength ( psi) : Modulus of elasticity ( ksi) :. In sheet metal, there is a powerful bend constant known as the K- Factor. SOLIDWORKS sheet metal tools are relatively straightforward, but may not be clearly understood. In order to produce an arc element factor with a defined opening angle an average arc length of b a length compensating element has to be deducted. When metal is bent the top section is going to undergo compression and the bottom section will be stretched. Thicknesses can vary significantly; extremely thin sheets are bending considered foil , leaf pieces thicker than 6 mm ( 0.Due to this elastic recovery it is necessary to over- bend the sheet a precise amount to bending acheive the desired bend radius bend angle. K- Factor calculator The program is used to calculate the K- factor in sheetmetal bending. Bend Deduction ( BD) – The amount removed from the sum of the two flange lengths to obtain a flat pattern. CAD software often comes pre- loaded bending with a nominal K- factor value if it has a sheet metal environment. 29 k- factor they are at minimum made with a two hit process .
Sheet metal is metal formed by an industrial process into thin, flat pieces. for S1: 1 inch = 25. As you know, adding a bend to a piece of metal makes it much more ridged. From personal experience: Consult the sheet metal fabricator about the BA ( Bending allowance) radius , thickness , however, BA , based on other people' s experience, it' s best if the fabricator gives you the table with sheet material type, K Factor - some figures may be used based on a rule of thumb K factor. Bend Angle ( B< ) – The inside angle between the two legs or flanges of a bend. 42 thoughts on “ The Art And Science Of Bending Sheet Metal ” Charles. Often bend allowances are calculated for a sheet metal part and used to factor make costly. Bending sheet metal k factor. Bending Springback Calculator.
The K- factor depends on many factors including the material bottoming, air- bending, bending the type of bending operation ( coining etc. Fy = 36 ksi Purlins are Z 7 x 2. In sheet metal design, the K- factor is used to calculate how much sheet metal one needs to leave for the bend in order to achieve particular final dimensions. Most frequently expensive sheet metal bending tools, are used to bend sheet metal, called factor brakes factor but you can also complete this task without one. 5 light gage steel, weighing 2.
25 in) are considered. It ultimately allows you to estimate the amount of stretch without knowing what type of material you are bending. The bending program is very simple user friendly requires no previous knowledge. After a bending operation, residual stresses will cause the sheet metal to spring back slightly. This value varies depending on the material being used.
Introduction Advantages of SolidWorks Sheet Metal Tools Design Intent for Sheet Metal Fabrication Specified tools for sheet metal operations and common features Bend Factor – K Factor Calculations Visual aids – Flatten Features Link features to sheet thickness Automatically closed corners. The k- factor is nothing more than a multiplier that can give you an accurate value for the relocated neutral axis. And if you know the bend allowance, you can extract the k- factor from it. Once you know the k- factor, you can use it to predict the bend allowance for various angles. The k- factor is fundamental to designing precise sheet metal. The Gateway to Up- To- Date Information on Integrated ' Whole Building' Design Techniques and Technologies.
bending sheet metal k factor
The goal of ' Whole Building' Design is to create a successful high- performance building by applying an integrated design and team approach to the project during the planning and programming phases. The mold line lengths are the distances measured to the outside mold line and are equal to the flange lengths plus the setback.