Belt Drives

Hi and welcome to all students!

As you were informed, click the link below to find information on  belt drive.


BELT DRIVES

BELT DRIVES PRESENTATION

What is a belt?
A belt is a looped strip of flexible material used to mechanically link two or more
rotating shafts. A belt drive offers smooth transmission of power between shafts
at considerable distance. Belt drives are used as source of motion to transfer to
efficiently transmit power or to track relative movement.

TYPES OF BELT DRIVES BASED ON ARRANGEMENT:
Types of Belt drives based on the arrangement are as follows

• OPEN BELT DRIVES

• CROSSED OR TWIST BELT DRIVES

• BELT DRIVE WITH IDLER PULLEYS

• COMPOUND BELT DRIVE

OPEN BELT DRIVE

• The Open belt drive is arranged with shafts arranged parallel and rotating in the same direction.
• The driver pulls the belt  from one side and delivers it to the other side thus the tension in the one side belt will be more than that in the other side belt.

CROSSED BELT DRIVE

• The crossed  or twist  belt drive is used with shafts arranged parallel and rotating in the opposite directions.
• The tension in the tight side will be more than the slack side. The point where the belts rubs against each other and there will be excessive wear and tear.
• To avoid this the shafts should be placed at a maximum distance of 20b where b is the width of the belt and the speed should be less than 15 m/s.

COMPOUND BELT DRIVE

• A compound belt drive is used when power is transmitted from one shaft to another through a number of pulleys.
•  The belts are connected in such a way that the driver moving one system of drives is simultaneously moving the other connected system.

IDLER PULLEY

1) Adjust tension and slack in the belt

2) Increase the belt contact area with pulley

3) To make drive compact

Mechanical Components

Click HERE for Multiple choice papers

The following mechanical components are used in designing engineering to make design solutions functional and practicable. Click the link to see more on these components.

Coupling

Coupling.pdf 

Belt drives

Gears

Bearings

Bushings

Mechanical Seals

Properties of materials

Click the links below to find information on theses additional topics.

Nonferrous metals and non-metals

Properties of non-ferrous metals

Production of ferrous metals

Heat treatment

Assignments

Class: HE11¹                        Subject: Mechanical Engineering Technology

Assignment 1: Properties of metals

Due Date: March 31, 2015

1.       Define the following properties of metals:

              a)      Malleability

              b)      Tenacity

              c)       Ductility

              d)      Hardness

              e)      Toughness

              f)       Brittleness              

              g)      Elasticity

              h)      Machinability

              i)        Corrosion resistant

              j)        Strength

                                             i.      Compressive

                                           ii.      Tensile

                                          iii.      Shear

2.       Explain the following metal treatment processes:

             a)      Hardening

             b)      Case Hardening   

             c)       Quenching

             d)      Tempering

             e)      Annealing

             f)       Normalizing

             g)      Spherodizing

3.       Discuss electroplating and state its purposes.

4.       Explain the following processes:

            a)      Galvanizing

            b)      Copper plating

            c)       Terneplating

            d)      Anodizing

Assignment 2: Production of Ferrous Metals

Due: April 14, 2015

1.       Explain what are ferrous metals.

2.       Explain how the following ferrous metals are manufactured:

            a)      Pig iron

            b)      Cast iron

c          c)       Plain Carbon steel

3.       Also give the furnaces used in the manufacture of each metal above.

4.       What are the types of ores used in the production of pig iron.

5.       Give the countries where each type of ore can be found.

6.       Give the percentage iron content in each type of ore.

7.       Explain  how steel is made in the following furnaces:   

             a)      Bessemer converter

             b)      Open hearth furnace

             c)       Electric Arc furnace

8.       State the carbon content and uses of

            a)      Low carbon steel

            b)      High carbon steel

CXC Mechanical Engineering Technology Syllabus & Past Papers

For the syllabus click here.


Below are links to some past papers.

PAPER 02

1. 2014_May
2. 2011_May
3. 2010_May
4. 2007_May
5. 2006_May

PAPER 01

1. Multiple Choice 1
2. Multiple Choice 2
3. Multiple choice 3

SBA Material List

Material List

PIPE VICE

Pipe Vice Material List

Pictorial Sketch of Pipe Vice

Pipe Vice Sketch

Material List of Machine Vice

Machine Vice Material List

Pointers for SBA Report

• Have a cover page with

Your Topic

CXC Mechanical Engineering Technology

School Based Assessment

2015

                                                              Candidate:  

                                                             Territory: Jamaica

Centre #:   100163        

                                                              School:     Dunoon Park Technical High School           

• Introduction

                 - Outline your topic

                 - Discuss how information was collected and treated

                 - Give a brief background to your chosen company

• Products Made
• Management structure
• Employment profile
• Norms of the company and codes of regulations and policies which affect the company's operation
• Process chart of a major product(s)
• and description of the Method (s) of production
• Types and sources of raw materials used
• Types and function of machines
• Marketing of products
• Safety practices and policies
• Waste disposal procedures
• Environmental protection practices and policies
• The use / impact of technology on/in:
• employment / careers
• security / processing
• environment
• Major findings (discuss the impact of the manufacturing process on: the environment; community; workers etc. or anomaly in any area of the company's operation)
• Recommendations (make suggestions to address the major findings)

Format of report

• Font type Times New Roman 12 pt and double line spacing.
• Headings should be bold and centre
• Subheadings should be bold and aligned left
• All margins should be 1 inch
• Pictures should be formatted as follows:

For figures, make sure to include the figure number and a title with a legend and caption. These elements appear below the visual display. For the figure number, type Figure X. Then type the title of the figure in sentence case. Follow the title with a legend that explains the symbols in the figure and a caption that explains the figure. Example:

Figure 1. Mushroom head chisel. figure showing the head of a chisel that is mushroomed.

SBA due date

The due date for FINAL submission of ALL pieces of SBA is February 16, 2015.

CXC Timetable

Mechanical Engineering Technology paper 02 May 5, 2015.
Mechanical Engineering Technology paper 01 June 11, 2015.
Access your CXC 2015 timetable here .