Three-dimensional thinking method for the dimensioning integrity of composite solids
The dimensioning integrity of a composite solid had poor practicability for having neglected local cutting structures such as holes,slots and wedges when using the conventional shape analysis method.A three-dimensional thinking method was proposed in which any composite solid could be considered as the superposition of basic bodies with positive and negative volumes.Following the order of"shaping-location-overall",all dimensions in length,width and height directions could be sought one by one and repetitive,controlled and zero-valued dimensions were simultaneously eliminated.A composite solid of bearing block was taken as an example.The results demonstrated that the proposed method could effectively avoid the deficiency and redundancy of dimensioning for three-view drawings,and therefore ensure the dimensioning integrity.
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