A case study with real product and process data shows

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ns found for 2-holes patterns. The position of the locator p1 on the secondary datum is coincident with the Ycoordinate of the pattern barycentre. The locators p 2 and p 3 should be located in a quasi-symmetric configuration with respect to the X-coordinate of the pattern If we apply the barycentre method, we obtain that the probability the pattern of holes falls inside the tolerance zone reduces of about 0.9% when the distance between the holes is lower than half of the distance between 2 locators on the X axis and of about 0.09% when the distance is higher, as shown in Table 4. We obtain a reduction of 0.008% in the first case and of 0.56% in the second case, if we apply the maximum distance method (see Table 4). Table 4. Optimal position of 2-1 pins of the considered 4-hole plates Case 1 2 3 4 5 p1 0, 50 0, 60 0, 40 0, 60 0, 40 Proposed approach p2 p3 P robability 0, 0 0, 0 5, 0 0, 0 31, 0 120, 0 115, 0 120, 0 89, 0 120, 0 mean std. deviation 0.0914 0.0833 0.0833 0.0998 0.0998 0.09152 0.00825 p1 0, 50 0, 60 0, 40 0, 60 0, 40 Barycentre met...
View Full Document

This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

Ask a homework question - tutors are online