Comparison of Modelling and Analysis of Crane Hook with Modified Crane Hook

IJSRD - International Journal for Scientific Research & Development| Vol. 3, Issue 11, 2016 | ISSN (online): 2321-0613

Comparison of Modelling and Analysis of Crane Hook with Modified Crane Hook Dhaval H.Patel1 Dr. Kalpesh V. Modi2 1 P.G. Student 2Associate Professor 1,2 Department of Mechanical Engineering 1,2 Government Engineering College - Valsad, Gujarat (India) Abstract— A crane hook is a device for grabbing and lifting loads by means of a device such as a hoist or crane. A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain or rope to which the load is attached. An attempt is made in this paper to study the analysis of crane hook and our modified crane hook, reference crane hook dimensions, its load capacity and its application in the company’s official website of MAZZELLA LIFTING TECHNOLOGIES.I decided to change the cross-section of the crane hook which is capable of the lifting the 5 tonne load without fracture by use of modelled out in CREO PARAMETRIC 1.0 software and analyzed in CREO SIMULATE. After analyzed the crosssection of crane hook, we got best result of modified crosssection compared to reference product in different parameters such as weight, stress, and displacement. We got minimum weight 10.8kg which is approximately 0.4 kg lower than the reference product, and minimum stress of 176.0Mpa and displacement of 0.38mm which are lower than the reference product.

Key words: Crane Hook, CREO Software, Static Analysis

From above specification, I can see that MAZZELLA LIFTING TECHNOLOGIES used crane hook which has dimensions as follow: Load capacity: 5 tonne Bed diameter: 80mm Throat of the hook: 64mm Material: Aisi 4140 Alloy Steel Other specification we can compare with the below Fig.(2) and specification:

I. INTRODUCTION Crane hook is the basic load lifting equipment. Crane hook is mostly used in industry to move the material from one place to other place for various appliances A crane hook is a device for grabbing and lifting loads by means of a device such as a hoist or crane. A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain or rope to which the load is attached.

After deciding to work on crane hook for our project, I got the knowledge about crane hook such as its dimension, its load capacity and its application in the company’s official website of MAZZELLA LIFTING TECHNOLOGIES. And took their product as a reference for our project which capacity is 5 tonne during working.

I decided to change the cross-section of the crane hook which is capable of the lifting the 5 tonne load without fracture by use of modelled out in CREO PARAMETRIC 1.0 software and analyzed in CREO SIMULATE. Its crane hook specification as under Fig. (1):

Fig. 1: Specifications of Reference Crane Hook

Fig. 2: Crane Hook II. MODELLING AND MESHING OF CRANE HOOK A. Reference Crane Hook: In our project, we have taken reference from MAZZELLA LIFTING TECHNOLOGIES which can be seen from above chapter. It is modelled by us as its dimensions are taken from its catalogue. Its model is modelled by use of CREO PARAMETRIC 1.0 which is shown in Fig. (3) below that:

Fig. 3: Reference Crane Hook The detailed drawing of the crane hook shown in Fig. (4) under:

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Comparison of Modelling and Analysis of Crane Hook with Modified Crane Hook (IJSRD/Vol. 3/Issue 11/2016/072)

The detailed drawing of the crane hook shown in Fig. (8):

Fig. 4: Drawing of Reference Crane Hook The mass properties of this crane hook are as under in Fig. (5): Mass=11.28kg

Fig. 5: Mass Properties of Reference Crane Hook These properties are calculated within the CREO software from the model shown above .the meshing of the reference crane hook is shown in Fig. (6)

Fig. 6: Meshing of Reference Crane Hook B. Modified Crane Hook: In Modified crane hook, I change only the cross section of crane hook. Modelling of modified crane hook is shown in Fig. (7).

Fig. 7: Modeling of Modified Cross-Section

Fig. 8: Drawing of Modified Crane Hook The mass properties of this crane hook is Shown in Fig. (9) under: Mass=10.85kg

Fig. 9: Mass Properties of Modified Crane Hook The meshing of the reference crane hook is shown in Fig. (10):

Fig. 10: Meshing of Modified Crane Hook III. RESULTS AND DISCUSSION A. Stress Analysis: Stress analysis of Reference and Modified Crane hook is carried out in CREO SIMULATE Software is Shown in Fig. (11) &Fig. (12):

Fig. 11: Stress Analysis of Reference Crane Hook

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Comparison of Modelling and Analysis of Crane Hook with Modified Crane Hook (IJSRD/Vol. 3/Issue 11/2016/072)

which is less than allowable stress, so that we can say that our crane hook design is completely safe.

Fig.12: stress analysis of modified crane hook From stress analysis stress generated in Reference crane hook is 203.4MPa and Stress generated in Modified Crane hook is 198Mpa. B. Displacements Analysis: Displacement analysis of Reference and Modified Crane hook is carried out in CREO SIMULATE Software is Shown in Fig. (13)&Fig. (14):

C. Comparisons Table: We discussed Reference and Modified crane hook in our earlier part of our Paper and we are analyzed this two types of hook by stress and displacement analysis and mass properties also calculated within software. Below table show the comparison of all the above cross-section of crane hook: Hook Weight Stress Displacement Cross-section (kg) (Mpa) (mm) Reference 11.2 203.4 .44 Modified 10.8 176 .38 Table 1: Result Data of Reference and Modified Crane Hook IV. CONCLUSION As we conducted our extreme efforts to justify our aim for this project, finally we concluded some results as under.

After analyzed the cross-section of crane hook, we got best result of modified cross-section compared to reference product in different parameters such as weight, stress, and displacement. We got minimum weight 10.8kg which is approximately 0.4 kg lower than the reference product, and minimum stress of 176.0Mpa and displacement of 0.38mm which are lower than the reference product, we can see that in above comparison table.

REFERENCES

Fig.13: Displacement Analysis of Reference Crane Hook

[1] R.S.Khurmi ,Machine design [2] Machine design 2,(Tech max publication) http://en.wikipedia.org/wiki/crane_hook�

Fig.14: Displacement Analysis of Modified Crane Hook Maximum displacement of Reference crane hook and Modified crane hook is .44mm and .38mm respectively Which can be generated by CREO SIMULATE Software.

We have taken material AISI 4140 Alloy steel from standard material used for crane hook has yield stress 415MPa .The American Society of Mechanical Engineers (ASME) has for some time been the secretariat for the ANSI B56 Committee which deals with standards for crane hook, such as B56.1 – Safety Standard for Low and High crane hook We have taken Factor of Safety (F.O.S.) 1.5 for lifting equipment from ASME standard.

YIELD STRESS OF MATERIAL (293Mpa) Allowable stress = FACTOR OF SAFETY (1.5)

As per above equation, we get allowable stress (design stress) around 276Mpa.From stress analysis of modified crane hook, our max stress around 207.8Mpa

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