steel column
R500 per metre
steel for cross braces
R20 per metre
sheave wheels
R 150 000
winch and motor
R 1 200 000
cable
R 100 per metre
cage and skip
R 350 000
project manager
R 30 000 per month
engineers
R 30 000 per month
artisans
R 25 000 per month
semi-skilled workers
R 20 000 per month
unskilled workers
R 12 000 per month
Now it is time to make a model of your head gear. You will need to make several different parts:
In this activity, you will make the first part, the head frame.
Remember : Your teacher will watch you while you make your model to see how well you:
Safety tips:
Never play with cutting tools. Never point the sharp end at someone else. Keep your tools neat and clean and in good working order. Do not spill glue or leave the lid open as the fumes are poisonous.
Not everything you try will work well. So don't beafraid to change your designs to improve them as you go along.
You can make your steel columns using cardboard. Look at Figure 7 to help you. You can make round or rectangular columns depending on the former you use:
A former is a shape that can be used to make tubes. For example, when you wrap a flat sheet over a rectangular former, you make a tube with a rectangular cross section.
1. Choose how you will make your columns and thenmake all the pieces you will need for your model. Have another look at Figure 7 to help you. (1)
You can make cross braces by joining flat pieces of corrugated cardboard together. You can use tape or glue to join the flat pieces. Look at Figure 8 to help you. Figure 8 shows three types of cross braces: angle irons, T-beams and I-beams.
2. Decide which of these cross braces you need for your head frame. Then make the cross braces you need. You will use these cross braces and the columns you made earlier to make a model of your head frame. (2)
Look at Figure 9. This figure shows one side of a frame.
3. Carefully cut your beams to the right size and shape to fit neatly between the columns. Then glue or tape them on. (2)
4. Cut your angle sections so that they can fit across the columns. Trim the ends so that the outside of the angle can be joined to the side of the column, but remember that the angle has to fit neatly between the columns. (2)
5. When you are happy with your first side frame, make the second inexactly the same way. (1)
6. Now make your head frame by joining your two side frames together. (2)
Look at the pictures shown in Figure 10. They show two ways to make a model sheave wheel:
For both methods, a plastic straw has been used to make a bearing through the middle of the wheel. This bearing will make the wheel turn easily on its axle or shaft.
7. Make you own sheave wheel. Try to make it as close to the correct scale size as you can. Use Figure 10 to help you. (1)
Your sheave wheel has to turn easily. It needs to have an axle passing through the centre of the wheel. You can use a dowel stick, about 4 mm in diameter, or a long nail (about 60 cm long) for your axle.
Look at the picture in Figure 11. A sheave wheel has been added to the top of a head frame in the following way:
8. Now add your sheave wheel to its head frame. Use Figure 11 to help you. (2)
Will your axle bend? Have a look at the axle supporting your wheel. This axle will have to carry all the weight of the lift. Does it have enough support? If the distance between the axle and the supports are too long, then it will bend and might break.
If you need to, add extra supports for the axle at the top of the head frame.
Next week, you will complete your mini-PAT. You will make a winch and a lift and then you will present your tender.
This week is the last week of your mini practical assessment task for mechanical systems in Grade 8.
You will make your mine winch and add it to the head frame you completed last week. Then you will add a lift, commonly called a cage, to your model.
After testing your system and adjusting it, you will collect all the work you have done so far for this mini-PAT, and use it to prepare a tender presentation to present to the tender board of the Platinum Stars Mining Company.
Do you remember investigating crank winches in Chapter 4 and in this chapter? Look at Figure 12 again. It shows you how to make a model mine winch yourself.
Here are a few important things to remember when making a mine winch such as this one.
Shafts and axles:
The centre of a wheel is called a shaft when it turns with the wheel.
When the centre of the wheel stays still and the wheel slides over it, it is called an axle .
1. Make a winch drum of your own. Remember it must be able to lift and lower a cage into the mine.
Will your cage be square or round? You can use a paper-towel tube for a round cage or any square box for a square cage. Tie your lift cage to the shaft side of the sheave wheel. [2]
Test your head gear
With your cage and your winch attached to the head frame, you now have a complete system. Test your system to ensure that you can lift and lower miners, and lift mined ore from a shaft underground.
Evaluate your solution
Look at the model your team has made.
1. Do you think the head gear is suitable for transporting miners to a depth of 500 m underground, and for lifting mined rock samples from underground? Explain your answer.
2. What have you done to ensure that your system will be safe?
3. What have you done to make your headgear look good so that the community will not complain about the mine ruining the area?
4. Do you think the environment will be damaged in any way by your structure?
5. Why should the tender board choose your head gear?
6. Are there any things the tender board won't like?
Prepare your tender.
1. Prepare a team presentation to the tender board of the Platinum Stars Mining Company. Each member of your team should talk about one of the points below:
2. Now present your tender bid to the tender board. (3)
3. While listening to other people's tender presentations, write down some of the best points about their tenders.
4. Which tender do you think should win? Explain your decision.
Remember : To be good at evaluating you must show that you can judge other people's work objectively. (1)
COMMENTS
Project overview. The project overview section of your brief should provide a clear and concise description of your design project. It should cover the what and why behind your project. For example: "We need a logo design for use online or in print", or "we need a logo animation in the MP4 format to be used in the introduction of our product ...
In the Design Brief, you will be writing about, how you intend to solve the problem. Always start the Design Brief by writing, 'I am going to design and make.....' What are you going to design and make? E.G. I am going to design and make a storage unit. E.G. I am going to design and make a photograph frame.
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Step 8: Share it with the team. RE: Step 1—design briefs are collaborative! You need the ability to quickly share, edit, and update your design briefs via custom permissions and convenient sharing options like a simple link. This will get the entire team quickly get on the same page (literally) and stay on target. 🎯.
Writing a design brief is a core skill of the Design and Technologies curriculum. A design brief presents the scope, audience and criteria for an effective design. It enables prospective clients to make sense of a designed solution and to understand how the designed solution will be achieved. The structure of design briefs can vary.
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Technology Grade 8 Teacher's Guide ... Week 8 (2 hrs) Lesson 15 Design brief: specifications and constraints 3D isometric projection Peer assessment to check if drawn to scale ... Learners write design brief with specifications for a device that uses a combination of gears: -
1. The brief and problem is mainly text (writing) that is printed in a clear style so that it can be read and understood easily. 2. The problem is a paragraph or more in length. It describes the problem you are aiming to solve. Do not say how you intend to solve the problem, only what the problem is.
2. Cover the scope. Now that the brief includes an overview of the business, you should lay out exactly what work is needed, also known as the project scope. Maybe the project is about creating a new logo for the company, doing graphic design work for a landing page, or web design for an existing product.
For example, you may improve a competitor's design by developing more creative ideas. 5. Outline the budget for the project. Understanding the project's budget is essential in the briefing process. Many clients provide a range to allow flexibility and more creative ideas.
TECHNOLOGY FACILITATOR'S GUIDE. Grade 8. ... writing, drawing or using models or products. ... . Design brief A short statement of a problem or need. For example, a plastic container for ...
The 'design brief' follows the 'problem' and states clearly how you intend to solve the design problem. Using a spider diagram helps you consider the project needs. Pop-Up Card Rich Picture. Writing a Design Brief A design brief is usually a paragraph in which you (the designer) explain what you intend to design. For this project, it ...
The drawing shows all hidden lines. (1) Make a 3D isometric drawing of what you will add to the structure Use a ruler. The drawing accurately shows the design you that sketched on page 92. (2) The drawing shows the dimensions in the correct way. (3) The drawing is to scale, and the scale is shown. (1)
GCSE; AQA; Creating a design brief - AQA Starting a design brief. Designers use a brief to give them guidance and focus. A brief helps define the design problem and gives details on important ...
Grade Eight. Learning Area: Technology. ( Further information on the Outcomes for this Learning Area ) Learning Outcome 1: Technological Processes and Skills. The learner will be able to apply technological processes and skills ethically and responsibly using appropriate information and communication technology. Assessment standards.
Write a design brief for a model of a bridge. Download free printable Grade 8 Technology Worksheets, Tests, Assignments and Projects for use in your classroom to enhance teaching.
Using a design brief helps you make goals and objectives clear to the other members of the team. It also helps you efficiently deliver important information and receive input from stakeholders. Here are some other benefits of using a design brief. Offers important insights and background information whilst giving the team a firm foundation for ...
Grade 8 Problem identification and finding a solution. Grade 8 Knowledge of structures, design and strengthening techniques. Grade 8 Knowledge of frame structures, r einforcement and relationships 1. Grade 8 Knowledge of frame structures, reinforcement and relationships 2. Grade 8 Knowledge of frame structures, reinforcement and r elationships 3.
assessment task for term 1. Over the next four weeks learners will investigate and design a model of a machine that can crush grains like. maize or wheat to make flour. They can start. the task after the first week. Each week learners can complete a part of the PAT, as the concepts.
Teacher's Guide 8Grade SM_Technology_G8_TG_CAPS_ENG.indd 1 2013/07/02 1:53 PM. Technology Grade 8 ... Week 8 (2 hrs) Lesson 15 Design brief: specifications and constraints 3D isometric projection ... Impact of plastic shopping bags on environment Report writing: effectiveness of using thicker, biodegradable shopping bags Homework activity ...
2.1 Writes or communicates a short and clear statement or a design brief in response to a given or identified situation for the development of a product or system. 2.2 Lists product and design specifications and constraints for a solution to an identified or given problem, need or opportunity based on most of the design key words listed below:
There are four main parts to a mine's headgear: Part 1: The winch or hoist is in a winding house. This part of the system is used to wind or unwind the steel cable. The hoist is attached to a motor and a control system. The mine cage and the skips are lowered into the mine when a steel cable unwinds from the winch.
Using a design brief helps you make goals and objectives clear to the other members of the team. It also helps you efficiently deliver important information and receive input from stakeholders. Here are some other benefits of using a design brief. Offers important insights and background information whilst giving the team a firm foundation for ...