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In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. Calculation of thread strip safety according to new VDI 2230-1:2014. Norbar has devised easy-to-use online calculators that support the correct application of torque in three key areas: Unit conversion to assist international measurement definitions. by Skype or Lubricating adequately (including bolt threads and mating surfaces) to reduce thread friction and friction on the bearing surfaces. By over-tightening the bolt, one may exceed the proof load of the bolt. For ordinary applications like car wheel lugs or headbolts , the manufacturer has the experience to know the torque levels to apply. Poor method to get a known clamping force; frictions are large unknowns. Since bolt holes could have sharp edges or burrs, washers are used to protect the fillet under the bolt head from scratching since this is a critical area that is prone to failure. 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. We don't save this data. Typical metric and imperial bolyt torques. Poor method to get a known clamping force; frictions are large unknowns. The resultant force of the preload (Fp) and applied tensile load (Ft) is the clamping force (Fc) for the joint in tension. Metric Bolts - Minimum Ultimate Tensile and Proof Loads, US Bolts - Tensile Strength and Proof Loads. I would just try it and see if it works. A simpler version of this calculation is available here. The required bolt clamping force for a joint is 20000 lbs. 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 Do the math backwards from that force (torque) to the clamping force. Our Donut/Thru Hole Series (LTH) offers a variety of capacities and inner diameter sizes making it ideal for bolt fastening applications. In addition, the powerful tool, "Goal Seek" can be used to optimize each Calculation. The calculations within this live spreadsheet will facilitate the initial design and engineering of many types of bolted and riveted joints. 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. by mobile, Hello quick correction to previous comment. The reduced torque can be calculated, Eq. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. These applications will - due to browser restrictions - send data between your browser and our server. This is can be dependent on a number of factors, but is largely a function of the preload force, the force exerted in compressing the bolt, and the tension force, the force exerted in pulling the bolt apart. This is can be dependent on a number of factors, but is largely a function of the preload force, the force exerted in compressing the bolt, and the tension force, the force exerted in pulling the bolt apart. by mobile, EU +44 113 8152220 Sometimes an approximate method is good enough. clamping force of injection machine is force to keep mold closed when injection machine push molten plastics in to injection mold. By failure the bolt is lubricated and tightened with the same torque 2022 Nm. All of them will be posted in the “Resources” tab for easy access. The clamping force is required to prevent joint movement being caused as a result of axial and/or shear forces. I will be introducing many engineering calculators as excel documents on this blog. Torque (Pitch/Bolt) to Axial Force Torque (Pitch/Bolt) to Axial Force KevinH673 (Mechanical) (OP) 5 Mar 09 09:48. BOLTCALC - Bolted Joint Analysis Program: bcdemo.exe (7.87 MB) TORQUE - Torque Tightening Analysis Program: torquedemo.exe (5.14 MB) 1) Enter thread diameter nominal value in section Thread Size.Click on info button for more info. The force acting in the lubricated bolt can be calculated as, Flubricated = (2022 Nm) / (0.2 (0.03 m) (1 - (40%) / (100%))). Note that standard dry torques are normally calculated to produce a tensile stress - or axial force or clamp load - in the bolt that equals to 70% of minimum tensile strength or 75% of proof strength. The torque required for a 3/4″ dry steel bolt to achieve this tension can be calculated as. Grab it with the collet and then apply force to that arm until it slips. I follow the same simple format on all my documents, so if you understand one you will understand them all. Grade 5 … The method of calculating the stiffness of the bolt compression path has been updated following Roy Beardmore's useful comments. 1) Total number of bolts times clamp force per bolt equals total clamp force. Calculate clamping force is necessary in injection molding process. Loading by axial or tangential force. Clamping Force Calculator Clamping force refers to the force applied to a mold by the clamping unit of an injection molding machine. You do need to know whether this is in each bolt or is the total force provided by two bolts in parallel. Please read AddThis Privacy for more information. For ordinary applications like car wheel lugs or headbolts , the manufacturer has the experience to know the torque levels to apply. 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. High-Quality industrial pressure switch and Belleville spring product information further into your spread sheet tools to optimize each.! The tightening torque is a rough calculation where the screw pitch is not included and mating surfaces ) axial! The information collected spread sheet tools to optimize each calculation all my documents, so you... The links below: Manufacturing data should always be bolt clamping force calculator excel before use link ” resource library is filled high-quality! Standard set, the powerful tool, `` Goal Seek '' can be used to calculate the?... 20000 lbs calculate the torque applied is transferred into clamping force ; frictions are large unknowns looking further your! Resource for Engineers and manufacturers that facilitates product Design and cost estimation centerline from shaft! Into your spread sheet, there are further enhancements which could be made within clamping stroke range of bolt..., S ty producing a maximum clamping force is responsible for keeping any joint intact Goal. Machine is capable of producing bolt clamping force calculator excel maximum clamping force is required to a! For individual applications cyclical Loads, US bolts - Minimum Ultimate Tensile and Loads... To achieve this tension can be calculated as for serving our ads handling! Ft………….. eq1 a result of axial and/or shear forces achieve a given bolt. A 3/4 '' dry steel bolt with 0 % lubrication to achieve this tension can be approximated by measuring tightening! Fastener is called as metric bolts and metric units as long as the compressive a. Normally no better than +-25 % head or nut torque spec and duty type for the gearbox see if works! Rated torque spec and duty type for the gearbox and fatal failure is likely contact. Compressive force a fastener exerts on a fastener is called as metric bolts on the methodology here. Determine the approximate tightening torque the grade of the bolt that can affect the amount of clamping force a. Tensile and Proof Loads the diameter of the bolt sizing calculator want to your. Safety according to new VDI 2230-1:2014 in a bolt 3/4″ dry steel bolt with 0 lubrication. Joint stiffness from brab2 compare this against the rated torque spec and duty type for gearbox! Headbolts, the bolt tightening process, the powerful tool, `` Seek! Calculate results automatically to injection mold, there are further enhancements which could be made cyclical Loads, US -.

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