(b) A rectangular block with a bolt hole was produced based on the drawing in Figure Q4(b). An engineer was given the task to check the quality of the product to ensure it follows the drawing specifications. The drawing shows dimension of the hole and the form tolerance. Ø 10.0 ± 0.1 ? | Ø 0.2 ? | A Figure Q4(b): Drawing of a block with a bolt hole (unit in mm). (i) The form tolerance is described by feature control frame. Interpret the requirements stated in the feature control frame. [4 marks] (ii) Interpret the hole diameter as required by the feature control frame. [2 marks] (iii) Assume that a CMM has been calibrated and is set to run a measurement program specifically for the product. Outline briefly FOUR (4) CMM measurement steps to verify the tolerance requirements stated by the feature control frame. [4 marks] (iv) Given a shaft with a diameter of 10.2±0.1 mm is fabricated as the mating part to the rectangular block's hole. Analyse the type of fitting for this assembly. [7 marks]
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The form tolerance is described as 10.0 ± 0.1 ± 0.2. The first ± 0.1 represents the straightness tolerance, which means that the axis of the hole must be within a straightness tolerance of ± 0.1 mm. This means that the axis of the hole must not deviate more than Show more…
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