Bat knocking machine PDF

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final report of my course project Theory Of Machines...

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COMPLEX ENGINEERING PROBLEM-2020 FINAL REPORT-ME313 Faculty of Mechanical Engineering

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Complex Engineering Problem

Project Course: Theory Of Machine Course Instructor: Dr. Sohail Malik Project Members: 1. Hamza Amir Nawaz (2017135)

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TABLE OF CONTENTS 1

Introduction.........................................................................................4 1.1 Abstract…………………………………….……….…………..............5 1.2 Background……………..………………………………………………….5 2-Literature Review………………………………………………………………………….7 2.1 Manual Bat Knocking Technique.………………………………..8 2.2 Bat Knocking Mahcine………………………………………………..8 2.2.1 Drawbacks of Bat Knocking Machine.………………………9 3-Design and Modelling……………………………………………………………..10 4-Analytical Method…… ……………………………………………………………….27 5-Conclusion ……………………………………………………………………………….35 6-References………………………………………………………………………………..37

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Chapter

1

INTRODUCTION

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1.1 Abstract The Aim of this task is to configuration bat thumping machine utilizing MSC Adams Simulation Software and examines the instrument through systematic conditions and analytical solution. While investigating and structuring the bat thumping system we need to remember the accompanying requirements: •

Design ought to be basic and effectively applicable

•

Cost effective Machine

• Reduce Human Effort 

Environmental Friendly Machine

• Increase the profitability of bats

1.2 Background

Bat Knocking Machine is a device used to prepare the new cricket bat to be used for the first time. This process is the significant portion for the preparation of the new bat. [1] The commonly seen wears in bats are surface cracking and decolourization on the blades surface; these don’t usually affect the performance of the bat. But in addition, damages can also occur due to mistimed shots, mishandling of bat, contact with wet conditions or even playing with substandard balls. The bat should be immediately assessed if any one of the above mentioned damages appears on the bat. To maximize the life of the bat and to gain the most out of it, it is strongly recommended not to play with it before knocking in.

[2] Figure-1 Knocking-In Process

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Chapter

2

Cricket bats are commonly made of stringy woods. After the assembling of the bat, it ought to be oiled, dried and appropriately thumped in so as to get the best execution. To future secure the bat tape ought to be applied at the edges of the bat. It ought to be guaranteed that the bat is appropriately arranged before it is put to use in ground or net for better strokes and long life. As the willow is delicate, it must be packed and made hard enough to hold up under the weight of the ball. A cricket bat without oiling and thumping can't proceed as great as the ones that are thumped in. Thus oiling and thumping are the mustdo ventures for another bat; if not, it not just motivations lackluster showing yet prompts breakage and tears. [1] The duties that a knock-in process does to a bat are as follows

     

Compresses and binds the fibers firmly Eliminates pores between the fibers Makes the edges round and compact Prevents the bat from cracking Increases the usable life of the bat Increases the sweet-spot on the face of the bat

LITERATURE REVIEW

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Following are the method through which the the knocking-in process can be performed:

2.1 Manual Bat Knocking Technique Under manual activity, the bat ought to be pleasantly oiled by the linseed oil. The bat is then permitted to be dry for very nearly 24 hours. The thumping in process is proceeded as appeared in Figure-1. Ball hammer is hit on the bat on various occasions. After each blow hammer, power is progressively expanded. The fiber tape ought to be applied on the corners for insurance.

2.2 Bat Knocking Machine It ought to be guaranteed that the bat is appropriately arranged before it is put to use in ground or net for better strokes and long life. As the willow is delicate, it must be packed and made hard enough to hold up under the weight of the ball. A cricket bat without oiling and thumping can't proceed as great as the ones that are thumped in. Thus oiling and thumping are the mustdo ventures for another bat; if not, it not just motivations lackluster showing yet prompts breakage and tears. [1]The knock in process can also be done with the help of automatic or semiautomatic knocking machines available in the market. These machines are highly sophisticated and takes less time to knock compared to the manual knocking process. These Bat Knocking Machines can produce 12 knocks per second and comes fitted with bat feeding mechanism that allows the bat to move to and fro in both direction. This machine is also equipped with counter sensor that stops the machine autonomously once the desired value is achieved. Our work is just to set the required number of knocks; the machine will automatically knock the bat uniformly. If needed, we can also knock a particular portion of the bat by just disabling the feeding mechanism as shown in figure 2.

[3]FIGURE-2

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Chapter

2.2.1 Drawbacks of Bat Knocking Machine

3

[1] Following are the drawbacks:   

Machine is Expensive. The maintenance and operation is also expensive. Cannot be operated at homes and small sports shops as machine is heavy.

Design & Modeling

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3.1 Design Procedure Step 1: a.) Click on the MSC Adams application. b.) Click “New Model”.

Figure-3

Step 2 (Creating model database): a.) Now click “Working Directory”, where you want to save the file. b.) Set model name according to your choice. c.) Set Gravitational Force in negative y-axis. d.) Units should be MMKS-mm, kg, N, s, deg.

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Figure-4

Step 3 (Setting Working Grid): a.) Double click the working grid icon in the bottom right corner. The icon is fourth from right side. b.) Adjust Working Grid according to your model size.

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Figure-5

Step 4 (Setting up the Slider-Crank Mechanism) a.) Click “Bodies icon”. b.) Click “RigidBody:Link”. c.) The crank is 20 cm, coupler is 40 cm and hammer radius is 5 cm

Figure-6 d.) Another slider crank mechanism is set to move the bat, as shown in Figure-7. The coupler, which is attached to the base of the bat, is 20 cm and the crank is 10 cm.

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Figure-7

Step 5 (Setting the revolute and translate joints) a.) Click on the “connectors”. b.) Click the “revolute joints”. Set the revolute joints between the links. c.) Set the translate joint on the hammer and bat base.

Figure-8

Step 6 (Setting the motion) a.) Click “Motions”. b.) Click “Rotational Joint Motion”. c.) Set the rotational speed 30 rad/s for crank joint having hammer assembly and rotational speed 5 rad/s for crank joint having bat base assembly.

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Figure-9

Step 7 (Simulation of the model)

a.) b.) c.) d.)

Click “Simulation”. In the simulate section, click “Run an Interactive Simulation” icon. Click “Forever” and set step size to 0.1. Now click “Start”.

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Chapter

4 Position, Velocity and Acceleration Analysis of Slider-Crank Mechanism using Analytical Method

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POSITION ANALYSIS

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VELOCITY ANALYSIS

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ACCELERATION ANALYSIS

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Chapter

5

Conclusion

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Chapter

6

We introduced two slider-crank mechanisms in our project. This way through better utilization of bat knocking mechanism, it can bring many benefits. It results in accurate knocking and reduced labor rate. We made an in-depth analysis of bat knocking machine and been able to analyze the motion in MSC Adams Software. References

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[1] Dr.R.Naveenkumar, S.Janaki Raman, C.P.S.Hari Haran, S.Karthick Raja.” Cricket Bat Knocking Machine”. INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 9, ISSUE 01, JANUARY 2020, pg 3117-3118. Retrieved from http://www.ijstr.org/finalprint/jan2020/Cricket-Bat-Knocking-Machine.pdf [2]

CJI Oiling & Knocking In Service. (n.d.). Retrieved May 10, 2020, https://www.cjicricket.com/accessoriesf/bat-care/cji-oiling-knocking-in-service-detail.html

from

Khandivar, Milan. “Automatic bat knocking machine ppt”. Slideshare, October 17 2019. Retrieved from https://www.slideshare.net/AshwinGrx/automatic-bat-knocking-machineppt Kell, Leana. “Knocking in, oiling and protecting your bat”.newitts.com, April 17 2015. Retrieved from https://www.newitts.com/blog/knocking-in-oiling-and-protecting-your-cricket-bat? country=/

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