Problem 1 Using the figure below draw on the figure itself s

Problem #1 Using the figure below (draw on the figure itself), specify the datums according to the following instructions: 1. Specify the axis of the 12.2 diameter as datum D. 2. Specify the centerplane of the 12.0 slot as datum C. 3. Specify the pattern of two 6.4-6.8 diameter holes as datum E 4. Specify the centerplane of the 38.0-38.6 width as datum B. 5. Specify the axis of the 4 diameter hole as datum F

Solution

Answer for problem 2

1. Minimum no. Of point in contact

Datum A- 3 points (primary)

Datum B- 2 points (secondary)

Datum E- 1 point (tertiary)

2. The datum B is secondary datum and it will restrict 2 degrees of freedom.

-rotation about Y axis

-translation along X axis

3. No. Of DOf will restrict by Datum A

Since datum A is PRIMARY datum.

It will restrict three(3) Degree of freedoms.