Sheet metal weight calculation You also have access to the latest bending brochures and news. speed high tonnage blanking, and force type of forming rather than displacement type of forming. The Anatomy of a Die Cut A normal metal stamping process (creates a die cut) is to drive a sharpened tool steel punch through the sheet or strip material into a die cavity, where the slug or scrap is ejected. The calculated tonnage can be used for the selection of a machine, such as a press brake, to perform the bending operation. The calculator accepts measurements in decimal format based on inches. Select a shape below to calculate the punch tonnage required. 0.500 x 0.250 x 80 = 10 tons required. Portable Punching Unit Our Porta-Punch is the quickest and easiest way to punch up to 13/16" Round Holes in 1/2" thick mild steel with a MAXIMUM tensile strength of 65,000 psi. It is important to include the stripper pressure when calculating die tonnage requirements. When the mold gap is appropriate, the blanking deformation process can be divided into: 1. Thank you so much for this information! Tonnage calculations are estimates for … L = Total cutting length. Steel saws from 7-1/4" to 15", and the highest quality saw blades for any metal cutting application. For more information, please read Proper Die Clearance. Punch diameter x Material Thickness x 80 = Tons of pressure required. The shear strength of the material is determined, using the die and press providing a Pounds/Linear Inch value. Learn more about Bending. We can calculate the tonnage it will take to cut your product, from a particular material on a specific press with a certain cutting board. Total inches x thickness x (some material strength factor you know to be correct) /2,000 is one way to get total tonnage needed. From this you can calculate the press energy requirement. I, just like the above commenter, had been searching for information on this for a long time before I found your site - thank you it saved my day! 4. A = L x S = Shear area. The die ratio may be entered to calculate the die opening, which is typically 6 to 18 times the sheet thickness. Press Brake Tonnage Load Calculator. For your convenience, we included a tool below to calculate a decimal value from the fraction of inches. ... Maxium amount of shear will cut tonnage in half as long as you have enough stroke movement on the punch. Calculates the clamping force for injection molding and die casting. Without spraying oil, the punches will get dull twice as fast as the die, which is a good reason to buy twice as many punches as dies. Clamping force indicates the amount of force that the clamping unit can apply to the mold to … Use it to calculate die clearance required for perforating metals, plastics, and more. If the die width is acceptable, calculate the … . Elastic deformation stage 2. Interstate die cuts custom gaskets and other specialized products using steel rule and rotary die cutting machines, high tonnage beam presses, high-speed punches, and specialty shears. Has pre-entered densities for dozens of commonly-used metals and metal alloys like steel, aluminum, nickel, iron, copper, cadmium, gold, silver, etc. S = Material thickness. Use the following formula to calculate the approximate tonnage required to punch a shaped hole in mild steel: 1/3 Perimeter of punch x Material Thickness x 80 = Tons of pressure required Initial coll… After you calculate the required die tonnage, it is important to determine: Where in the press stroke the die load (tonnage) is applied from bottom dead center (BDC) of the press stroke. Input data into the required fields for your material and punch & die configuration. P = Stripping force. P= ( L x S x Tß ) / 10. Plastic deformation stage 3. This free online calculator determines die clearance according to a proprietary database containing over 2000 clearance tests. Fragmentation separation stage 1. Depending on the die cutting equipment and your application requirements, the following types of tooling are used: Example: 3.1416 X 2.000 X .250 X 25 = 39.26 TONS. Metal weight calculator online - free steel weight calculator. To calculate tonnage requirements for perforating, ... thickness times the length of the cut, or perimeter of the hole, times the material shear strength (see Figure 18). Elastic deformation stage The initial stage of the punch just touching the sheet undergoes elastic deformation. This estimates the tonnage required to complete a 90° bend. We use a factor of 400 pounds per linear inch of rule up to 500 pound per inch depending upon material being cut. I have looked over the information you supplied me and I feel fairly confident your 50 ton press would be able to cut your material to the size and # up you are considering. BACK TO BASICS ESTIMATING SHEET METAL FABRICATION COSTS A Step-By-Step Guide to Understanding How Fabricated Parts Are Estimated Brought to you by . Shear Strength = 0.3447kn/mm 2. Typical Die Clearance for Punching Mild Steel Required Tonnage for Punching Mild Steel with Tensile Strength of 50,000 PSI How to Calculate Required Tonnage for … The number of Good Dies will be as well calculated, using Murphy’s Low model of Die Yield and Defect density parameter. The heavier gauge the material is the bigger the Material Factor. L = a + ( R + q x s/2 ) ( Pi x ° / … So if a die has 1000 inches of cutting rule and is rubbered in strips of ½” wide on each side of the knife, it will calculate to 1000 x 300 and 1000 x 50 or 350,000 lbs of pressure or 175 tons. Paper is 400 pounds. Calculating Die Cutting Tonnage Continued... 6.5 inches of cut rule with ejection = 1 ton pressure This should be good for paper up to .030 thick for thickness .031 - .050 reduce the inch count by 10% for thickness .051 - .070 reduce the inch count by by 20% for thickness .071 - .100 reduce the inch count by by 30%. Example: to punch a 1/2" hole through 1/4" thick mild steel. So if a die has 1000 inches of cutting rule and is rubbered in strips of ½” wide on each side of the knife, it will calculate to 1000 x 300 and 1000 x 50 or 350,000 lbs of pressure or 175 tons. Punch Force (KN) = 80 x 3 x 0.3447 = 82.728 KN Convert into tonnage: 82.728 KN ÷ 9.81 = 8.43 Ton. You will need to consider the length of the bend as well. The distribution of die tonnage over the press bed and slide areas for press deflection. Calculating the tonnage requirements for different materials typically requires certain test equipment including a sharp circular die preferably 1“circumference (diameter x (p) 3.141), and an adjustable pressure press.

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