|Pinned Joints - Course: Techniques of Fitting and Assembling Component Parts to Produce Simple Units. Methodical Guide for Instructors|
All instructions, demonstrations and exercises should be prepared thoroughly and meticulously.
2.1. Planning the Practical Vocational Training in the Techniques of Making Pinned Joints
Draw up a time schedule and set an approximate number of hours in which you expect to complete the instruction on the various techniques of making pinned joints. Plan an appropriate number of hours for the theory instruction on each subject, the practical demonstration, the instruction in the preparation of a particular job, especially the exercises, the proper execution of the exercises, for repetitions and checks. When planning your time schedule, remember the level of know-how of your trainees, the conditions of training, the jobs which your trainees will take on in future and the degree of difficulty of the respective training stage.
The emphasis at each stage of training is always on the impairment of high craftsmanship and teaching of mechanical skills with the help of practice-related exercises which should be given the biggest chunk of time in your schedule.
2.2. Preparing Labour Safety Instructions
A short labour safety instruction should precede every practical exercise, where the main points of the safe handling of all tools, auxiliaries, etc. are explained to avoid injuries. The directions which are binding on the safe handling of drills, countersinks and reamers should be repeated as they apply to the techniques of pinning. The following focal points should be repeated several times:
- Make sure that all tools are clean, sharp and undamaged.
- Use hammers, drifts, punches, etc. which are in good condition.
- Make sure that the workpiece is clamped securely and safely. Never apply excessive force. This may damage the workpieces.
- Put all measuring and testing means aside at their proper places. Use pads, supports, etc. where provided, to protect them against impact, shock and corrosion.
- Drive in pins only when the component parts are securely clamped and cannot slip.
- It is regarded as good workmanship to keep ones workplace tidy and always to put down individual components together with their matching parts.
Have a notebook or file at hand where you keep minutes of these instructions. All trainees shall certify with their signature that they were instructed accordingly.
2.3. Preparing the Teaching Aids
- Each trainee should have a copy of the Trainees Handbook of Lessons - Pinned Joints.
- Prepare surveys and tables which you can write at the blackboard prior to theory struction periods.
- Make available a sufficient number of pins, pinned joints, as well as samples or functional assemblies with pinned joints for demonstration.
2.4. Preparing the Working Materials
- Each trainee should have a copy of the Instruction Examples... - Pinned Joints for theoretical reading.
- Make sure that a sufficient number of tools, measuring and testing means and auxiliary accessories are available as specified in the Instruction Examples.... -Pinned Joints.
- Check that there is a sufficient supply of tools, measuring and testing means and auxiliary accessories for the practical exercises at hand.
- The following is recommended as a basic stock:
· Marking gauges, steel scribers, centre punches
· Locksmiths hammers, light metal hammers, drifts, punches
· Vernier callipers, plug limit gauges, try squares
· Drills, cylindrical and taper reamers, countersinks, triangular scrapers
· Cutting fluid, machine grease, tap wrenches
· Vices with protected jaws, specific clamping devices
- A bench-type or column-type drilling machine and the required work-holding devices are needed for preliminary operations (drilling, boring, countersinking).
- Check the safe and reliable operation of these machines before your trainees use them.