duk748
Mechanical
- Jul 18, 2007
- 167
hello - i have a situation here at our company where someone is trying to convince me that the the term "squareness" for the checking of a rail face attached to a post
mounted to a base which in turn is mounted to a flat housing is not being taken into account for the completed assembly at the point of inspection -
the rail mounted to the post is held both perpendicular & parallel to the slot in the post - the base of the post is held also to the machined rail slot -
the flat housing is machined w/ very tight tol. dowel pins to locate the completed post/rail assembly to the housing -
the only time the rail face is inspected is when the entire assembly is complete & the roller assembly rides on the rail face - then the
rails are checked for paralleisum/perpendicularity to the flat housing -
the persons contention is that at that point of the assembly you cannot have any "squareness" of the rail face to the flat housing due to it consisting of 3 different parts
now assembled together - i believe what the person is meaning to say is that the rail face is not "perpendicular" to the flat housing -
i know this is difficult to see so i will try to post a sketch later - my belief is that inorder to change this assembly & get the "squareness" this person wants is to
make a fixture for the post to the housing, indicate the perpendicularity of the rail face w/ respect to the top of the housing & then pin it -
any info or suggestions would be appreciated - thank you
mounted to a base which in turn is mounted to a flat housing is not being taken into account for the completed assembly at the point of inspection -
the rail mounted to the post is held both perpendicular & parallel to the slot in the post - the base of the post is held also to the machined rail slot -
the flat housing is machined w/ very tight tol. dowel pins to locate the completed post/rail assembly to the housing -
the only time the rail face is inspected is when the entire assembly is complete & the roller assembly rides on the rail face - then the
rails are checked for paralleisum/perpendicularity to the flat housing -
the persons contention is that at that point of the assembly you cannot have any "squareness" of the rail face to the flat housing due to it consisting of 3 different parts
now assembled together - i believe what the person is meaning to say is that the rail face is not "perpendicular" to the flat housing -
i know this is difficult to see so i will try to post a sketch later - my belief is that inorder to change this assembly & get the "squareness" this person wants is to
make a fixture for the post to the housing, indicate the perpendicularity of the rail face w/ respect to the top of the housing & then pin it -
any info or suggestions would be appreciated - thank you