Patent ID: 6470546
Filing Date: 2002-10-29
Classification: B21D,F01N,Y10T

Abstract:
Apparatus for producing a linkage between an exhaust pipe and a hollow cylindrical air/fuel ratio detector holder with an opening for receiving an air/fuel ratio detector in the holder, comprising means for providing a desired finished shape of the exhaust pipe through internal high-pressure on a buckling portion of the exhaust pipe so as to have an inverted contact contour shape complimentary to a convex casing surface of the detector holder, said means including:an internal high-pressure tool divided into an upper die and a lower die for forming a surface by inserting a blank pipe into the desired finished shape of the exhaust pipe, and a shaping device integrated into the tool with a contour facing the pipe corresponding to a contact contour of the casing surface of the holder at a location of intended contact surface at the exhaust pipe.