Fiber reinforced, plastic sliding bearing preform manufacture involves compressing fiber reinforced preform while moving preform along its own plane to produce rubbing and /or sliding effect on material surface

• Main Authors: DENECKE, ULRICH, KUNTZE-FECHNER, GERALD
• Format: Patent
• Language: English; German
• Published: 11.01.2007
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BEARINGS; BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL PROCESSES OF COMPOUNDING; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; WEAPONS; WORKING-UP

A non-metallic, fiber-reinforced material(12) for a sliding bearing is prepared as a solid, semi-finished sheet or strip. The semi-finished preform is pre-compressed(F z) using a pressure applicator(6,8,10) acting perpendicular to the plane(E2) of the material. Simultaneously the preform is moved in a direction(Y) along the material plane which creates a rubbing and/or sliding effect(F y) between the material and the pressure applicator to enhance the friction, wear and fitting characteristics. Bearing material(12) is prepared at a thickness of 0.15-1mm, preferably 0.25-0.75mm and more preferably 0.5mm. The initially coarse structure and/or texture of the material is smoothed during pre-compression and becomes more uniform. Applied pressure(F z) is 8-50MPa, preferably 10-30MPa, more preferably 15-25MPa. Preform material movement(Y) during compression is parallel to the principal direction of the fiber reinforcement and the direction of movement is at =45[deg] to the principal direction of the fiber arrangement. Preform movement is at 10-30mm/sec. preferably 20mm/sec. Pre-compression and preform movement can be repeated several times until a required surface finish is achieved. The preform is then formed three-dimensionally to produce a sliding bearing. An independent claim is included for a sliding bearing manufactured as claimed from a formed preform and mounted in a sliding bearing housing. Verfahren zur Herstellung eines nichtmetallischen, mit Verstärkungsfasern versehenen Gleitlagerwerkstoff-Halbzeugs mit verbesserten Reib-, Verschleiß- und Passungseigenschaften, umfassend folgende Schritte: a) Bereitstellen eines nichtmetallischen, mit Verstärkungsfasern versehenen Gleitlagerwerkstoffs (12) in einem platten- oder streifenförmigen, festen, ausgehärteten Halbzeugstadium; b) Vorverdichten und optionales Vorverschleißen (F¶Z¶, F¶Y¶) des bereitgestellten nichtmetallischen Gleitlagerwerkstoff-Halbzeugs (12) durch Druckbeaufschlagung (F¶Z¶) mittels einer Druckbeaufschlagungseinrichtung (6, 8, 10) in einer zur Plattenebene des Halbzeugs (12) im Wesentlichen senkrechten Druckbeaufschlagungsrichtung (Z), während das Halbzeug (12) relativ dazu in Richtung (Y) der Plattenebene fortbewegt wird, so dass ein Reib- und/oder Gleitvorgang (F¶Y¶) zwischen dem Halbzeug (12) und der Druckbeaufschlagungsrichtung (6, 8, 10) erzeugt wird.