Abstract
The static, thermal and dynamic deformations of the machine tool structure are measured by means of holography. The whole optical system for laser holography is placed on the heavy reinforced concrete block supported by several air cushions. The double exposure method is used in the static and thermal tests, while the time average method is used in the dynamic tests to obtain the mode shape and vibration amplitude of the structure at a resonance frequency. The transient thermal deformation of the structure is evaluated by taking the interference photographs at a certain interval during the cooling-off period of the structure and by assembling these results in the preceding intervals. Holography is also proved useful to examine the mechanical behaviors of the machine interface.
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