|Machining of Material/Metal - Course: Machining of Metal. Methodical Course-Guide for Instructors|
Instructions, demonstrations and exercises should be prepared thoroughly and meticulously. This includes:
2.1. Planning the Practical Training in the Techniques of Making Joints
Set an approximately appropriate number of hours in which you want to complete the instruction in the individual techniques of making threaded joints. Plan an appropriate number of hours for the theoretical introduction into each technique, the practical demonstrations, the task-related instructions in preparation of the exercises, the proper execution of the exercises for recapitulations and controls.
When planning your time schedule, remember the level of knowledge attained by your trainees, the conditions of training, the future jobs which your trainees will take on, the degree of difficulty of this training.
The emphasis at each stage of training is always on the teaching of manual skills. They must be given the biggest chunk of time in your schedule.
2.2. Preparing Labour Safety Instructions
A short labour safety instruction should precede any practical exercise, where the major points of the safe handling of all working tools are explained to avoid injuries. The details of the safe handling of drills, countersinks and thread cutting dies will be explained.
These main points should be repeated several times:
- Make sure that the tools are of the right type and size and in proper working order.
- Make sure that the workpiece is clamped tightly and safely. Do not use excessive force in clamping a workpiece as it will cause damage.
- Use assembly tools of the right size for tightening or loosening bolted and screwed joints. Tools of the wrong size tend to damage the workpiece and may slip off causing injuries.
- Make sure that large parts cannot drop to the ground when the bolts and nuts or screws are removed.
- Always keep your workplace in order, store all tools properly and place individual parts always together with their matching parts.
A notebook or file should be at hand to keep minutes of these instructions. All trainees are required to certify with their signature that they were instructed accordingly.
2.3. Teaching Aids and Materials
- Every trainee should be given a copy of the Trainees' Handbook of Lessons - Threaded Joints.
- Surveys and tables should be prepared as blackboard drawings prior to the instructions.
- Different kinds of tools, bolts and screws, a number of threaded joints, as well as functional models of assemblies using threaded joints should be used in the demonstrations.
2.4. Working Tools
- Each trainee should have a copy of the Instruction Examples for Practical Vocational Training - Threaded Joints as a theoretical basis of the exercises.
- Make a sufficient number of component parts and joints always available for practical exercises, as described in the Instruction Examples....
- Make sure that a sufficient number of tools, measuring and testing means as well as auxiliaries are available as specified in the Instruction Examples... - Threaded Joints.
The following basic stock of tools, measuring and testing means as well as auxiliary accessories is recommended:
- Marking gaugers, steel scribers, centre punches
- Locksmith's hammers, flat chisels
- Vernier callipers, try squares
- Drills, countersinks, thread taps, die stocks, dies
- Screw drivers, wrenches and spanners of different types and sizes
- Cutting fluid, machine grease, tap wrenches
- Vice with protected jaws, suitable types of clamping devices.
- A bench-type drilling machine or column-type drilling machine and the required work-holding devices should be available for necessary preparatory work, such as drilling, boring and countersinking.
- Check the safe and reliable operations of these machines before your trainees use them.