Lesson Notes By Weeks and Term - Junior Secondary 2

TERM – 2^ND TERM

WEEK EIGHT

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic:  METALSWORK MACHINES 2

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Identify the processes of involved in each care and maintenance of metal work machines.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS:   Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

 METALSWORK MACHINES 2

Processes for Cleaning

The process of cleaning metalworking machines typically involves the following steps:

1. Use a brush or vacuum to remove loose sawdust, chips, and debris from the machine's surfaces and components.
2. Use a damp cloth to wipe down surfaces, removing any remaining dust or residue.
3. Inspect and clean moving parts, such as gears and bearings, removing any accumulated debris.
4. Remove sawdust, pitch, or resin from blades and cutting components using an appropriate cleaning solution.
5. Inspect belts and chains for dust or debris accumulation, and clean if necessary.
6. Ensure that cleaned surfaces are thoroughly dry. Consider applying a protective coating to metal parts to prevent rust.

Processes for Lubrication

The process of lubricating woodworking machines involves several steps to ensure proper application and maintenance. Here are the key processes:

1. Locate the points on the machine where lubrication is required. These often include moving parts such as bearings, gears, and sliding surfaces.
2. Choose the correct lubricant based on the machine's requirements. Consider factors like temperature, load, and speed.
3. Before applying new lubricant, clean the lubrication points to remove any existing dirt or debris.
4. Apply the lubricant to the identified points using the appropriate method, such as a manual grease gun or an automatic lubrication system.
5. Regularly check the levels of lubricant in reservoirs or lubrication points and replenish as needed.
6. Adhere to the manufacturer's guidelines regarding the type and frequency of lubrication.

Processes for blade maintenance

Blade maintenance for woodworking machines involves several processes to ensure sharpness, efficiency, and safety. Here are the key steps:

1. Regularly examine the blade for any signs of damage, wear, or dullness.
2. Clean the blade to remove any pitch, resin, or other residues using an appropriate cleaning solution.
3. Ensure the blade is properly tensioned according to the manufacturer's specifications.
4. Use a sharpening tool or system to restore the blade's sharp edge.
5. If there are damaged or missing teeth on the blade, replace them as needed.
6. Inspect Blade Guides and Bearings: Check and clean blade guides and bearings for proper alignment and smooth movement.
7. Select the appropriate blade for the specific material and type of cut.
8. When not in use, store blades in a clean and dry environment.

Processes for maintaining tension belts and chain

Maintaining proper tension in belts and chains for woodworking machines is crucial for optimal performance and safety. Here are the processes involved:

1. Identify the locations where belts and chains require tension adjustments. Refer to the machine's manual for guidance.
2. Regularly inspect belts and chains for signs of wear, fraying, or damage.
3. Use the appropriate tension adjustment mechanism to achieve the recommended tension levels.
4. Ensure that belts and chains are properly aligned on pulleys and sprockets.
5. Use a tension gauge, if applicable, to measure and adjust the tension accurately.
6. Adhere to the manufacturer's recommendations regarding tension levels and adjustment intervals.
7. If chains are involved, lubricate them regularly according to the manufacturer's guidelines.

Processes for maintaining electrical components

Maintaining the electrical components of woodworking machines is essential for safety and optimal performance. Below are the processes involved:

1. Regularly inspect all electrical connections, terminals, and wiring for signs of wear, damage, or loose connections.
2. Clean electrical components, such as switches and control panels, using a dry, clean cloth or a gentle cleaner.
3. Inspect power cords for any damage, fraying, or exposed wires. Replace damaged cords immediately.
4. Regularly check and test circuit breakers and fuses to ensure they are in good working condition.
5. Tighten any loose electrical connections using appropriate tools.
6. Monitor electrical components for excessive heat buildup during operation.
7. Regularly inspect and test emergency stop buttons to ensure they function correctly.

Processes for maintaining safety features

Maintaining safety features on woodworking machines is crucial for protecting operators and ensuring a secure working environment. Below are the processes involved:

1. Conduct routine inspections of all safety features, including guards, emergency stop buttons, interlocks, and other safety mechanisms.
2. Regularly test emergency stop buttons to ensure they quickly and effectively stop the machine when pressed.
3. Check and test interlock systems to ensure they prevent machine operation when safety guards are open.
4. Regularly inspect and clean blade guards to ensure they are in good condition and properly positioned.
5. Test safety switches to ensure they engage and disengage as intended.
6. Regularly review and follow the safety guidelines outlined in the operator manual provided by the manufacturer.
7. Ensure operators are adequately trained in the proper use of safety features and understand their importance.

EVALUATION: 1. Identify 5 processes for cleaning metal work machines.

2. Identify 5 processes of lubricating metal work machines

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively