Design and Analysis of Torque Handling Capacity of Slot Headed Grub Screw

[Ravinarayan.R.Rao, Lingaraj.K.Ritti, Pavana Kumara], Volume 3: Issue 2, August 2016, pp 13-19
Abstract—The main objective is to optimization of strength of flat slotted screw head with different slot shapes. These slot shapes are modeled on Solid Edge ST2, mechanical design software and analyzed in ANSYS 14.5, a finite element analysis (FEA) software. The model consists of 3 slotted flat headed grub screw profile with their corresponding screw driver profile. The aim was to obtain the maximum torque handling capacity from among the identified slot shapes. For this purpose, an iterative process involving design up gradation and finite element analysis was done. To validate the model, testing was conducted on the specimen in the Torsion Testing Machine and results were compared. The study shows that a variation in the slot shape of a screw can influence the torque handling capacity Measurement of torque carrying capacity of flat headed screws by varying the slot angles and identify the one that withstands higher torque. The primary objective is to conduct torque test on screw specimen with different slot angles and to identify the slot shape angle that withstands higher torque, and to determine the variation of torque carrying capacity with slot angles, and to carry out Finite Element Analysis (FEA) and to compare the experimental results The purpose of optimizing the slot shape design, an iterative process was carried on. Repetitive analysis on ANSYS® with a change in the design in SOLIDEDGE ST2 was conducted to make sure that failure occurs on the screw head. Methods followed to complete the tasks Identification of slot shape, Design of a grub screw, Holder and Driver Material Selection and properties, Fabrication of specimen, Experimentation conduct using Torsion Machine, Analysis using ANSYS workbench.

Index Terms—Grub screw, Finite Element Method, Torsion machine, Optimization, ANSYS.
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