old hw1 solutions

old hw1 solutions - force. PART C. Advantages of new design...

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Homework 1 Solutions Grading: Problem 1.1, 1.4, 1.13, 1.15 : 2 points each. Part B and C : 1 point each.
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PART B . Problems with the 7/24 taper tool holder in high speed applications: Some important points: Due to centrifugal force the spindle taper expands resulting in loss of contact between the tool and the holder. Vibration increases due to loss of taper contact. Tool may move in the Z direction due to loss of contact resulting in machining errors. Lack of end-face contact between tool and holder decreases rigidity of the assembly. Tool gripping force at the gripping fingers decreases with increase in centrifugal
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Unformatted text preview: force. PART C. Advantages of new design : Figure 5 More gripping fingers ensure better balance of centrifugal force. Axial positioning is improved by the flange around the cone. Hollow cone ensures lesser centrifugal force and better balance at high speeds. Design provides repeatable accuracy and high speed capability. Figure 6 End surface contact provides greater rigidity to the assembly. Spherical elements on the flange improve axial positioning and radial stiffness. High repeatability for axial and concentric positioning....
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old hw1 solutions - force. PART C. Advantages of new design...

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