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 Six degrees of freedom of a body/object in space  Principle of work/tool holding (location and restraint)  Example of work holding method.

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Presentation on theme: " Six degrees of freedom of a body/object in space  Principle of work/tool holding (location and restraint)  Example of work holding method."— Presentation transcript:

1  Six degrees of freedom of a body/object in space  Principle of work/tool holding (location and restraint)  Example of work holding method

2  If we consider a body/object in space it is free to move in six directions as follows : a) Back and forth along the X axis b) Side to side along the Y axis c) Up and down in the Z axis d) Rotate either way about the X axis e) Rotate either way about the Y axis f) Rotate either way about the Z axis

3  To be able to carry out work on the material/object it is necessary to locate the material in a set position on the machine and restrain it using some form of clamping/fixing device to prevent any linear or rotational movement.  The clamping/fixing devices can consist of:  (A) positive restraints, where a physical object prevents the material from moving.  (B) frictional restraints, where the material is gripped between two or more objects.  (C) a combination of positive and frictional restraints.  Where possible a positive restraint should be used to resist cutting forces.

4  If the material is placed on a flat surface as in diagram below some of its states of freedom become restrained

5 When location pins are added as in diagram below it becomes further restrained and also located in set positions

6 If clamping screws are then added as in diagram below the material becomes fully restrained and located in set positions

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