Mechanical Design ID-19

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12/24/2012

SABITA DEVI EDUCATION TRUST

BRAINWARE GROUP OF INSTITUTIONS Approved by AICTE & affiliated to WBUT

BY STUDENTS OF BRAINWARE GROUP OF INSTITUTIONS

OVERHAUL----A PROJECT ON ROBOTICS.

A Synopsis Of The Project Work | By--->Rohit Bhattacharya

SABITA DEVI EDUCATION TRUST BRAINWARE GROUP OF INSTITUTIONS Approved by AICTE & affiliated to WBUT

BONAFIDE CERTIFICATE: This is to certify that the project entitled “OVERHAUL” has been jointly developed by the following members :

   

Anupam Das Debabrata Pal Saikat Das Rohit Bhattacharya Belonging to the stream Electronics And Communication .

Signature of the Guide

Submitted for the Project Work Viva held on ______________.

ACKNOWLEDGEMENT

We express our sincere gratitude and extend our grateful thanks to Prof.Shyamol Guha, Department of Civil Engineering, Brainware Group of Institutions for encouraging us and giving valuable suggestions for doing this work.

We also would like to thank Mr. Pradip whose valuable suggestions and constructive criticism helped us immensely in improving this project.

Last, but not the least, we are grateful to our family members for their constant encouragement that helped us in improving ourselves

CONTENTS I.

Abstract-----------------------------------------------------------

II.

Introduction------------------------------------------------------

III.

Components Used---------------------------------------------

IV.

Block Diagram To Build The BOT------------------------------

V.

Component Description-----------------------------------------

VI.

Model Of The Overhaul BOT------------------------------------

VII.

Limitations Of The BOT------------------------------------------

ABSTRACT  Overhaul basically is project that deals with constructing a ROBOT, which will be manually controlled.  In our real life there arise many situations such as earthquakes, floods, and avalanches etc. which demand swift and appropriate action.  This timely action can save many lives, but it’s not always possible for rescue teams to reach the most inaccessible areas.  This calls for a ROBOT which can accurately sight the victims, reach them by traversing any terrain and then finally save them by bringing them safely to the safe area.  In Overhaul we therefore try to develop such a BOT which can travel over any broken terrain be it sandy, covered with pebbles, water or anything else and recue dummy victims by effectively bringing them safely to the designated area.

INTRODUCTION  The first step towards building the BOT is to design the BOT within the specified dimensions which is of 40cmX40cmX40cm.  Our BOT measures approximately about 35cmX35cmX35cm.  It uses standard 4 PVC tires of diameter 6.5cm each.  Our BOT works efficiently on a standard 12V DC supply.  For this we either use an Adapter or a SMPS.  The main component of the BOT is the crane which needs to lift weights of maximum 300g.  To build the crane we have designed a wooden plank capable of holding the crane.  This wooden plank can rotate around 360®, giving the crane maximum possible flexibility.

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The crane is then connected with 2 High Torque Motors whose work is move the Crane arm up and down.  These High Torque Motors are of 10 R.P.M. Another motor is used to control the final Arm of the crane to which is attached the hooks.  These hooks are fixed to the last Arm of the Crane giving it maximum possible stability.  The whole BOT is controlled by TWO CONTROLS, to which is attached a maximum of 6 DPDT switches which enables the controller to maneuver the BOT sufficiently well.

COMPONENTS USED  Wooden Planks  Simple Motors (60 R.P.M)  High Torque Motors ( 5 and 10 R.P.M)  PVC Wheels  PVC gears  Clamps  Shafts  Metal hooks

 Screws and Bolts  DPDT switches  10-wires  Single string and Multi string wires  Remote Control Box  SMPS  220V power supply

BLOCK DIAGRAM TO Construct A Bot

Take a wooden plank measuring 35 X 26cm and make yhje edges plain

Attach 2 clamps on either side of the plank, with exact distnace of 20 cm between them on either side

Attach two High Torque motors to the wooden plank and connect either sde of the 1st arm of the crane, so that it can be moved up and down.

Dril a hole through the pieces and put an axle through it which contains the first arm of the crane.

Attach the 60R.P.M motors to each of the axles of the motors and fix the 4PVC tires tightly to each of them

On the plank attach a block of wood of 10 X 20cm. Attcah two pieces of wood to the sides of the block such that jut out.

Screw a mtor in the middle of the plank leaving a distance of 10 cm on either side.. Screw a PVC Gear to the axle of the motor

Attach a wooden Plank of 20 X 20 cm on the Gear, such that its able to 360.

Attach another arm where the first arm ends, to which is attached two fixed hooks. Fix a High Torque motor on the wooden block, wind a thread on the pulley attached to the motor. the thread is then connected to the 2nd arm of the crane

Component Description 1.Wooden Planks-

We use wooden plank here because of the stability which it provides. Its easy to shape, cut and use. Other materials such metal or aluminum can be used but then the BOT will not be as flexible.

2. 60 RPM Motors-

Features      

60RPM 12V DC motors with Gearbox 3000RPM base motor 6mm shaft diameter with internal hole 125gm weight 2kgcm torque No-load current = 60 mA(Max), Load current = 300 mA(Max)

3.High Torque Motors

Features          

10RPM 12V DC motors with Metal Gearbox and Metal Gears 18000 RPM base motor 6mm Dia shaft with M3 thread hole Gearbox diameter 37 mm.

Motor Diameter 28.5 mm Length 63 mm without shaft Shaft length 15mm 180gm weight 42kgcm torque No-load current = 800 mA, Load current = upto 7.5 A(Max)

4.PVC Wheels

High quality Plastic Tracked Wheel for motors with 6 mm diameter.     

68mm diameter 4cm width Hole diameter 6.1 mm Screw for fastening on motor shaft Made from virgin plastic

5.PVC Gears

This is a plastic gear building your own gearbox with customized gear ratio. The gear diameter is 12.50mm with 30 teeths. The motor shaft diameter is 3.00mm. It can be used with Motor axle diameter 2.0mm .

6.DPDT Switches:

This is a multipurpose DTDP Slide Switch. It is medium sided and perfect for mounting on boards and on enclosures, for which it comes with two holes on its body. Use this as a On/Off switch or just as a general purpose switch. This switch can also be used to control the direction for a DC Motor.

7. 10 Wires

Ribbon cable is really helpful in situations where you need to make a lot of connections without a big mess of wires. Nothing makes a project look more finished than a nice clean wiring harness.This is a 15ft. length of 10-wire ribbon cable.

8. Clamps

The clamp is used to mount the motors.

9. SMPS

General Purpose Power supply, 12V 2A, SMPS Based Design, Light Weight used to convert the 220V AC supply to 12V DC at which the motor works.

10. Shaft

1" diameter up to 2 11/16"Standard lengths: 20', 10', & 5'

MODEL OF THE ROBOTIC CRANE

Basic Moving BOT

MODEL OF THE CRANE.

LIMITATIONS OF THE BOT    

Needs a stable supply of 220V AC .

The crane cannot lift weights more than 300 g.

The BOT has a maximum speed of 60 RPM per second Cannot rescue more than two victims at a time.