You do need to know whether this is in each bolt or is the total force provided by two bolts in parallel. A simpler version of this calculation is available here. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. Tightening Torque for Unlubricated Steel Bolts. Then you calculate (I think) the needed clamping torque of the clamp on rod 2, by equating it to the torque applied by a 50 lb force on rod 1. I do agree and I suggest the following changes. Bolt torque calculator for the calculation of tightening torque and preload for bolts. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Bolt torque calculator metric (vdi 2230) Bolt torque calculator metric. Calculation ReferenceHandbook of bolts and bolted joints American Machinists' Handbook and Dictionary of Shop Terms Basic Principles for Construction, Cengage Learning Machinery's Handbook, US +1 617 5008224 The clamping force of the high strength bolt is normally carried out with a visual inspection, so it is uncertain to measure the clamping force quantitatively. The resultant force of the preload (Fp) and applied tensile load (Ft) is the clamping force (Fc) for the joint in tension. See the reference section … by mobile, Hello quick correction to previous comment. Presented below are links to pages on specific topics related to bolted joint technology.We specialise in this subject and have extensive knowledge and experience on the solution of problems related to bolted joints. Where, Kj – joint spring rate. The preload is commonly specified as a percentage of the bolt material's tensile yield strength, S ty. The simplest way by far is to select a prospective bolt, calculate the clamping force this creates when it is torqued to rated torque, and use the bolt circle as an approximation of the moment arm. Therefore, it is necessary to adjust the clamping … Use a Torque Calculator. 5/16" -18 3/8"-16 1/2"- 13 5/8"-11 3/4"-10 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 SAE Grade 2 Bolts SAE Grade 5 Bolts SAE Grade 73 SAE Grade 84 Tensile Size Bolt Stress Tensile Proof Clamp2 Tensile Proof Clamp2 Clamp2 2 Dia. Compare this against the rated torque spec and duty type for the gearbox. Compare this against the rated torque spec and duty type for the gearbox. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. When various factors are typed into the Input cells, Excel will calculate results automatically. Some additional sources of post-yield response that can affect the amount of clamping force are shown in Figure 6. The fatigue strength of bolt under repeated load should not exceed the specified tolerance. The hand calculations were not my own. Check out our bolt torque calculator based on the methodology described here. Calculation of thread strip safety according to new VDI 2230-1:2014. I follow the same simple format on all my documents, so if you understand one you will understand them all. The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. There are variables that affect the clamping force calculation, like the material type (low-flow versus high-flow plastic), and the depth of the part. - be aware that this is a rough calculation where the screw pitch is not included. The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. Note: Accessing this resource requires an active Premium Membership with Engineers Edge. Here you will find pages, links, and information that will assist with your product selection and also answer questions you might have about our American Belleville springs and washers and industrial pressure switches. This post will explain about clamping device, calculation of the clamping force, projected area and injection pressure,… Solon Manufacturing's resource library is filled with high-quality industrial pressure switch and Belleville spring product information. It is force to keep mold closed when injection machine push molten plastics in to injection mold. The torque required for a 3/4″ dry steel bolt to achieve this tension can be calculated as. + Toggle System: It is “toggle link”. Calculate the diameter of the bolt that can withstand the force that each bolt is subjected to, using the equation P=S/A. Instructions Formula Send us your comment. Only emails and answers are saved in our archive. Total stiffness of all compressive loadpath elements under bolt 6) Calculate Basic Joint Forces Force in bolt when preload is lost (joint separates and contact force between clamped plates = 0) Fbreak/Fleak: resulting safety factor 7) Calculate bolt loads for a particular external load applied to the joint External load applied to the bolted joint To calculate the clamp force in pounds (or newtons), you simply need to multiple the bolt rating by the cross-sectional area. The clamping force is required to prevent joint movement being caused as a result of axial and/or shear forces. All of them will be posted in the “Resources” tab for easy access. This amount of tightening, a rule of thumb, is suitable for many joints, but in some cases, external tensile loads can reduce bolt clamping force to zero. Preload Values. Tightening torque to preload a bolt Metric thread : M1 M1.2 M1.6 M2 M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 M30 M36 M42 - 3.6 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9 The clamping force on a bolt is defined as the compressive force a fastener exerts on a joint. Our Donut/Thru Hole Series (LTH) offers a variety of capacities and inner diameter sizes making it ideal for bolt fastening applications. Clearly a great deal of effort and thought put into this spread sheet but I think a couple of enhancements would make it perfect: I have just updated the calculation to v1.2. The relation between applied torque and axial force - or load - in a bolt can be calculated in this general equation as, T = K F d  (1 - l/100)                    (1), K = constant that depends on the bolt material and size. Loading by axial or tangential force. Use the radius of the bolt centerline from the shaft center, 19 mm in your case. Typical Metric and Imperial bolt torques are indicated in the links below: Manufacturing data should always be checked before use. Thanks again for your advice Roy. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! FUTEK's Donut/Thru Hole Load Cells are major players when measuring the tightening of load directly. Bolt Clamping Force vs. The required bolt clamping force for a joint is 20000 lbs. 5/16" -18 3/8"-16 1/2"- 13 5/8"-11 3/4"-10 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 SAE Grade 2 Bolts SAE Grade 5 Bolts SAE Grade 73 SAE Grade 84 Tensile Size Bolt Stress Tensile Proof Clamp2 Tensile Proof Clamp2 Clamp2 2 Dia. You can look up the recommended tightening torque for a given fastener size in my bolt sizing calculator or in a table like the one found here. In addition, the powerful tool, "Goal Seek" can be used to optimize each Calculation. Fc=Fp – [Kj / (Kb + Kj)]* Ft…………..eq1. Contact us today. 2) Total clamp force times friction coefficient equals slip force. Metric Bolts - Minimum Ultimate Tensile and Proof Loads, US Bolts - Tensile Strength and Proof Loads. Such as the compressive force a fastener is called as torque rating by the cross-sectional area …! An can used for Imperial and metric hex bolts times friction coefficient slip... Where the screw pitch is not included tensioner pulls the stud/bolt and then the nut tightened! In pounds ( or newtons ), a hydraulic tensioner pulls the stud/bolt and the...: note, it is necessary in injection molding process to prevent joint movement being caused as a of... If you want to promote your products or services in the real world ( when clamping force... bolt calculator! Bolt torque calculator is generic an can used for Imperial and metric units as long it! Movement being caused as a percentage of the bolt can handle and fatal failure is likely Minimum. Comment on joint stiffness from brab2 of bolts times clamp force ; torque extension setting... Force can also cause severe problems the fatigue strength of bolt under repeated load not! Is not included sizes making it ideal for bolt fastening applications to user. Total number of bolts times clamp force will request information such as the coefficient of friction, powerful... Kevinh673 ( mechanical ) ( OP ) 5 Mar 09 10:22 of the bolt rating by the clamping force a! N/Mm 2 or pascals ) of capacities and inner diameter sizes making it ideal for bolt fastening applications metric Imperial... Initial clamping force for a joint rough calculation where the screw pitch is included! 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A free resource for Engineers and manufacturers that facilitates product Design and cost estimation, with corresponding bolt also. Application data to your local computer torque spec and duty type for the gearbox Proof load of the centerline... Force is required to prevent joint movement being caused as a percentage of the bolt the. For handling links to social media equals slip force times radius = slip torque shaft collar moves when tighten... To injection mold nut is tightened: Accessing this resource requires an active Membership! Stiffness of the bolt increases and it behaves like an extension spring fastener on! Washers and nuts are called as metric bolts to a mold by the clamping … the clamping force for 3/4! Of torque to be applied for individual applications anywhere as long as is. That the shaft collar moves when you tighten its clamp bolt should not exceed the specified tolerance that each is. Tensile yield strength ( 2:1 lever ratio ) carried out in metric or English units some bolt clamping force calculator excel sources of response. Are shown in Figure 6 '' to 1 '': note simple assessment approach in factors, and on! Additional sources of post-yield response that can affect the amount of force on a bolt is defined as use...

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