|Keyed Joints - Course: Techniques of Fitting and Assembling Component Parts to Produce Simple Units. Instruction Examples for Practical Vocational Training|
The present material gives 4 selected instruction examples, by which the making of different types of keyed joints can be practised.
In these examples, drive-fitted keys, sunk keys, tangential keys and cotters are used.
Since keyed joints are made in various ways according to the respective function of the machine parts, simple pieces for exercise were chosen for practising the assembly and disassembly of the connections.
The material for the exercises must be prepared mechanically by turning, milling, shaping and reaming. In doing so, the given fitting sizes must be observed.
The keys are taken from standardized ranges or are to be premanufactured according to the given dimensions.
The prefabrication of the starting material is not described in this material.
In order to facilitate the preparation and carrying out of the exercises, the required materials, tools, devices, measuring and testing means as well as auxiliary accessories are indicated for each instruction example. Furthermore, the previous knowledge required for the accomplishment of the exercises is mentioned.
With the help of the working drawings and the appertaining sequences of operations the exercises can be independently be done by the trainees.