IJSTE - International Journal of Science Technology & Engineering | Volume 3 | Issue 07 | January 2017 ISSN (online): 2349-784X
Analysis and Modification of Screw Jack Body using Finite Element Analysis Omkar V. Shejwal UG Student Department of Mechanical Engineering Siddhant College of Engineering, Pune, India
Mohit D. Bhave UG Student Department of Mechanical Engineering Priyadarshini College of Engineering, Pune, India
Ranjeet D. Karande UG Student Department of Mechanical Engineering Siddhant College of Engineering, Pune, India
Abstract Screw jack is a portable device consisting of a screw mechanism used to raise or lower the load. There are two types of jacks most commonly used, Hydraulic & Mechanical .In screw jack, a small force is applied in the horizontal plane, used to raise or lower a large load. The efforts required in achieving the desired output can be effectively and economically be decreased by the implementation of better designs. Power screws are used to convert rotary motion into reciprocating motion. Screw jack is a device which is used to lift and support a heavy load in automotive vehicles, such as a car. Generally, human effort is required to rotate the screw; sometimes it becomes difficult to move the screw jack from one place to another due to its heavy weight. In this work, we have tried to reduce the weight of the jack body by creating holes on the body. So that the screw jack is easy to port and it will increase the human comfort while handling the screw jack. Keywords: Screw jack, Stress, Deformation, CAE Analysis ________________________________________________________________________________________________________ I.
INTRODUCTION
This paper deals with the design and modification of screw jack which is used for lifting heavy automobiles. The project helps in reducing the weight of screw jack body in comparison to the ordinary screw jack. A screw jack’s compressive force is obtained through the tension force applied by its lead screw. A square thread is most often used, as this thread is very strong and can resist the large loads imposed. These types are self-locking, which makes them more intrinsically safe than other jack technologies. This type of screw jack will be helpful for women and adolescents during the puncture to lift the vehicle when they have no means to serve. In a screw jack, rotary motion is converted into linear motion. There are stresses like shear and tensile stresses induced in materials which are responsible for failure of screw. Screw jack must consist of an adequate factor of safety and must be of high mechanical advantage, so that it can withstand sudden jerks which are unexpected. II. PROBLEM STATEMENT Design & FEA analysis of a screw jack body with holes, used for lifting a dead load of 800 kg. III. DIFFERENT PARTS OF SCREW JACK Screw jack has following parts:1) Frame 2) Screw 3) Nut 4) Handle 5) Cup 6) Set Screw 7) Washer
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