A composite texture roll forming die and a composite texture forming method thereof

Abstract

The invention discloses a composite texture roller forming die and a composite texture forming method thereof. The composite texture roller forming die comprises an upper roller with an arc-shaped convex and a lower roller with an arc-shaped groove; orderly distributed composite texture shapes are arranged on both the arc-shaped convex surface of the upper roller and the arc-shaped groove surface of the lower roller; each composite texture shape comprises a micro-concave cavity and a micro convex; plate materials to be machined are pressed between the arc-shaped convex of the upper roller and the arc-shaped groove of the lower roller. The composite texture roller forming die has the advantages that effective forming force distribution state of the die surface is actively controlled, flowing behavior and stress-strain distribution of materials are improved, equivalent plastic strain of edge materials of the plate materials is improved, probability of bulge appearing is reduced by about 5%, the roller precision is improved, the quality of forming parts is improved, surface hardness and wear resistance of the roller are improved, the service life of the roller of the roller die can be effectively prolonged, and comprehensive performance is enhanced; and structural design is reasonable, comprehensive using performance of the roller is improved, using reliability is high, and machining economy is high.

Description

technical field [0001] The invention relates to a roll forming mold surface treatment technology, in particular to a composite texture roll forming mold and a composite texture forming method thereof, belonging to the technical field of mechanical manufacturing. Background technique [0002] In the metal plastic forming process, the friction force provides the active force for the workpiece forming, which is the key factor affecting the quality of the formed part. The friction distribution of the workpiece-mold contact surface directly affects the flow behavior of the plastic forming material. The bulge caused by the unreasonable material flow in roll forming is a common form of failure. Research and practical application show that the distribution of forming force can be optimized by artificially controlling the distribution of surface friction characteristics; the roll forming die requires the roll to have high hardness, good wear resistance and a certain roughness; laser ...

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Problems solved by technology

[0003] For example: Chinese patent CN200510059343.6 The manufacturing method of the hardened layer of the cold-rolled work roll body discloses a method for manufacturing the hardened layer of the roll body. The roll body is preheated, induced electric heating, water spray cooling and Tempering treatment processes the hardened layer, although the wear resistance of the roll body is improved, but this process modifies the roll body as a whole, and subsequent maintenance is inconvenient and economical, and does not involve modification of the surface of the formed workpiece

[0004] For example: Chinese patent CN103602791A discloses a roll body surface treatment method, which measures the wear degree of the roll body before and after use, and uses laser to strengthen the severely worn area. This method is quick to repair, but the lubrication state of the roll mold surface has not been improved. Unable to improve the overall performance of the roll mold

[0005] For example: Chinese patent CN103628053A discloses a roller whose surface is covered with a lubricant composed of graphite milk, alcohol and water. Although the lubricating performance of the roller is improved, the bonding strength of the lubricant covered on the surface of the roller and the base material is low and easy to fall off, causing wear and tear. After that, the roll mold needs to be reprocessed, resulting in inconvenient maintenance of the roll mold, high manufacturing cost and poor economy

[0006] For example: Chinese patent CN105080979A proposes a process method of rolling thin plates using textured rollers, using EDT, shot peening, bead spraying, grinding or cross grinding to process textured rollers, and then the textured rollers modify the surface of the formed workpiece , modified treatment, but the surface of the mold obtained by this method has uneven roughness distribution, insufficient controllability, and inconvenient maintenance

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