Global Reflection of Tolerance Analysis:
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Based on our calculation, the minimum machined hole radius must be 0.088 inches, or diameter of 0.174 inches in order to ensure the plastic putter insert and the putter head mates correctly.
Tolerance Analysis: Putter Face Insert Hole Location
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Global Statement:
Our goal with this tolerance analysis is to find out the relevant hole diameter for the holes in the interchangeable plastic piece.
Relevant Physical Restrictions:
Location: Plastic Injection Molding Tolerance: +/- 0.003in
Machining Tolerance: +/- 0.002in
Diameter: Machining Tolerance: +0.004, -0.001in
Assumptions:
We picked one hole on the insertable piece to be in a set location, and calculated all our tolerances around the location of that point. We calculated based on the worst-case scenario, which would be machined holes being as close, or as far, as possible. The machined holes were set to be as big as possible and the injection molded holes were set to be as small as possible so that we could calculate the smallest hole size on the putter head.
Sketches
Hole locations of putter head and insert relationship
Dimension:
A = 2 in Length between center of machined holes
B = 2 in Length between threaded injection molded holes
a = 0.003 in Tolerance of Injection molded hole location
b = 0.002 in Tolerance of machined hole location + tolerance of machined diameter size.
ri = 0.082 in Radius of threaded injection molded holes
ro Radius of machined holes
Calculation:
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Equation relating hole location of both pieces
Solving for ro
Substituting numbers
ro in inches
Discussion:
Based on our calculation, the minimum machined hole radius must be 0.088 inches, or diameter of 0.174 inches in order to ensure the plastic putter insert and the putter head mates correctly.
