Design and analysis Of Crane Hook – Mechanical CAD/CAM Project

Abstract –

Hoists and cranes have a very important role in many sectors of various industries like the logistics, in ship building industries, steel industries, some transport vehicles, etc., for lifting loads and carry them. Many types of hooks having different ratings and sizes are used according to the specified objective. The types of hooks used are based on the type of hoist or the type of crane to which they are attached. This paper aims at building a 245 KN or 25-ton resistant block hook with a hook made up of using lead alloy in the market, Alloy 1.2367 (X38CrMoV5-3), which have high tensile strength, compression strength, and yield strength compared to the presently used alloy in the manufacturing of crane hooks. The design of block hook and its components is done in Solidworks Part Design and the individual components are assembled in the Solidworks assembly. The analysis on the hook using the Alloy 1.2367 (X38CrMoV5-3) is carried out in Solidworks Simulation. The images are rendered using Solidworks Visualize.

INTRODUCTION

The hooks used in hoists and various types of cranes play a major role in lifting the heavy loads in many sectors, industries, oil rigs, vehicles, etc. The performance of the hook depends on its load rating. Even though the hook may have high load rating, the failure of the hooks has many reasons such as the bearing used in the hook block, types of fastening system by which they are fastened to the hoists or cranes, materials used in the design of the hook, etc.

The hooks used for heavy loads also need to be large, big, huge and heavy in order to function safely at the prescribed loads. Due to this various types of researchers are taking place in the field of manufacturing of hooks such as process by which they are manufactured, metallurgy involved in the manufacturing, etc., in order to reduce the size, cost of manufacturing and to increase the flexibility in the usage of the hooks which can be used for high loads.

The present paper aims at building a hook by using the small shape in its design which can withstand heavy loads than the presently available hooks in the market for the same standards and rating.

GOVERNING THEORY

The strategy utilized as a part of the geometric simulations of design in Solidworks Simulation is the Finite Element Analysis (FEA). Finite Element Analysis utilized as a part of simulation software or solvers, for the most part, includes three stages. They are as per the following:

A. Pre-processing: In this progression, the finite element mesh for the designed model is produced and boundary conditions, material properties, and loads are applied to the composed model.

B. Solution: In this progression, the solutions for the problems for the given loads and boundary conditions. The outcomes, for example, Von Mises stress, displacements, strain, thermal impacts, and so on., are acquired in this progression.

C. Post-processing: In this progression, the results are pictured as contours, deformed shapes, and plots. This progression helps in the investigating, confirmation and approval of results.

hook joint
hook joint

Test Conditions

In this study conducted on the crane hook, the applied load value is equal to mg which is the weight of the crane hook. Here m is total mass of the crane hook and g is acceleration due to gravity. The force load is applied on the C- section of the crane hook in the direction of the gravity. Bolted supports at the bolt hole of the crane hook is used as fixtures on which the complete weight of the crane hook acts. The results of the crane hook analysis in the study using the materials Alloy 1.2367 (X38CrMoV5-3) are shown in Table 5, Table 6, Table 7 and Table 8.

The analysis criterion and the test conditions are:
The crane hook has mass m = 9.06591 kg when analyzed with Alloy 1.2367 (X38CrMoV5-3). Acceleration due to gravity which is equal to g = 9.8 m/s2 causes the load L = 88.8459 N when analyzed with Alloy 1.2367 (X38CrMoV5-3). Force load of F = 245 KN or 25 t is used on the inner C – section of the crane hook.
Von Mises stress failure criterion, URES Displacement criterions are used in the study.

Download Pdf Of Report : 

https://www.irjet.net/archives/V4/i9/IRJET-V4I912.pdf

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