Component i.e. sash fastener, manufacturing method for motor vehicle door, involves cooling metallic sleeve in die tool such that sleeve takes martensitic microstructure, and taking out sleeve from die tool as finished sash fastener

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This patent describes a manufacturing method for a metal component, specifically a sash fastener used in motor vehicle doors. The process involves heating a metal sleeve, shaping it through massive forming in a die, then quickly cooling it within the die to obtain a strong martensitic microstructure, resulting in a finished and robust sash fastener.

Use CasesContent extracted from patent full text and abstract with AI.

• Production of high-strength sash fasteners for motor vehicle doors
• Manufacturing of secure fastening components for windows and doors in vehicles
• Applications in any mechanical assemblies requiring strong, shaped metal fasteners with enhanced durability

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• Results in a sash fastener with superior mechanical strength due to martensitic microstructure
• Enables precision forming and finishing in a single process, improving manufacturing efficiency
• Improved safety and reliability of vehicle doors and windows through use of stronger components
• Reduces the need for further processing or heat treatment after removal from the die

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Patent Abstract

The method involves heating a metallic sleeve to an austenitizing temperature within a range of 850 to 950 degree Celsius such that the sleeve takes an austenitic microstructure. The sleeve is brought to desired end geometries in a die tool by a massive forming process. The metallic sleeve is cooled in the die tool such that the sleeve takes a martensitic microstructure. The sleeve is taken out from the die tool as a finished sash fastener (4). A material of the sleeve flows against a press direction of the die tool during the massive forming process.