The Process of Turning

The characteristics of a turning machine are defined by a rotating work piece, which is fixed in a chuck tool. The chuck tool consists of a swivel chuck unit with a so-called three-jaw chuck., which allows for centrical fixing of the work piece. In another version, the work piece is fixed by a so-called collet, which is only used in smaller machines, especially in bar automatic bar-turning machines. The use of collets is much less dangerous than the use of three-jaw chucks.

Dangers of the Turning Process

The highest dangers during the turning process are caused by the high speed. The mass of the turned part and the dimensions of the part are crucial factors, which must be taken in consideration. With larger parts, chuck jaws with appropriate dimensions are used. These chuck jaws cause the highest danger in the turning process. They are located in orbits. Since they are installed on so-called circular paths, they may be ejected in tangential direction. Chips are another source of danger. For ecological reasons, the amount of coolant used in machines was reduced. As a consequence, the chips ejected during the machining of the work piece will be much hotter than with the previously used amount of coolant.