METHOD AND APPARATUS FOR TESTING THE ADHESIVE STRENGTH OF OVERLAYS OF PLAIN BEARING BUSHINGS

摘要

A method and an apparatus (1) are described for testing the adhesive strength of overlays (3) attached to the inside of plain bearing bushings (2). The method is characterized in that clearance is specified between the plain bearing bushing (2) to be tested and a rotating or oscillating pin (5) extending through the plain bearing bushing (2). A liquid medium is fed into the gap (8) between the plain bearing bushing and the pin. Plain bearing bushing (2) and pin (5) are moved oscillatingly relative to one another perpendicularly to the bushing axis (9) for a given period with a given force and the plain bearing bushing (2) is examined after the load test for damage to the overlay (3). The corresponding apparatus comprises a pin (5), which is mounted rotatably with its two ends in a pin receptacle (20) and on which there is arranged a first drive means (7). In addition, a bushing receptacle (10) is provided, in which the plain bearing bushing (2) to be tested is interference-fitted, wherein the pin (5) is mounted with predetermined clearance in the plain bearing bushing (2). The apparatus additionally comprises means for bringing about oscillating relative movement of bushing receptacle (10) and pin receptacle (20).