Flat blank length 4. General - When pressure per square inch is known: psi x area of work/2000 = 2 tons of ram force required Example: Where it is known that 100 psi is needed to do a job on a 5" x 8" wide piece. We convert 5.7 ft 3 dryer capacity to pounds: We can now divide 228 lbs by 52.47 lbs/hr to get dryer residence time in hours: It is useful to reexamine the above calculation to review how we cancel units. Cutting force 2. Each time, we calculate the two fractions And we use for the calculating of the MACO Value the smallest value And by default if the two values are above the limit of 10ppm, we use the value of 10ppm for the MACO calculation. We must first determine the molding press thruput rate or total pounds per hour processed. 1910.217(b)(7)(viii) If the clutch/brake control system contains both the single and Tonnage calculations need to be precise in order for a sheet metal tooling project to be successful. If it's a hydraulic press, the max tonnage is calculated by multiplying the maximum hydraulic pressure generated by the power unit times the area of the rams' hydraulic cylinder times the number of cylinders. Mechanical Power Press Guarding and Construction, General Yes No N/A 1910.217(b)(7)(vii) If all operating controls are bypassed, is the clutch/brake control system designed to prevent actuation of the clutch? How do you calculate tonnage of forging press for the part to be forged? Motor Sizing Calculations This section describes certain items that must be calculated to find the optimum motor for a particular application. In best case scenarios, accurate tonnage calculations for sheet metal will help clients quote projects confidently and know the required forces to choose the correct press size. It is customary to provide the torque necessary to exert the rated press tonnage at some given point above the bottom of the stroke, commonly 1/4 up in the case of a double geared press. Selection Procedure First, determine certain features of the design, such as drive mechanism, rough dimensions, distances moved, and positioning period. Correction factor for flat blank length Related Topics . Press Force Calculation Bending is one of the most widely used sheet metal working processes. Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort; Related Documents . Selection procedures and examples are given. Hydraulic Press tonnage calculation How to compute tonnage requirement: 1. The nominal (Stated) tonnage for a press is around 70% of peak. That graph would likely have been included in the manual for the machine. Metal stamping calculation formular, inclusive of stripping force, cutting force, flat blank length calculation ... Online Formula for press Tool Design : 1. Bending a plate- metal requires a great amount of force, which is applied to the plate metal by means of a folding bench. It is very important to calculate the required pressing force before bending, because overloading can cause damage to the machine. 1st: traditional approach… Stripping force 3.