A 15°dc tubeless wheel rim flaring mold

Abstract

The invention discloses a flaring die for a 15-degree DC non-inner tube wheel rim. The flaring die comprises an upper die holder, a lower die holder, an upper pressing block arranged on the upper die holder and a lower pressing block arranged on the lower die holder. The flaring die is characterized in that an extruding surface of the upper pressing block and an extruding surface of the lower pressing block are conical surfaces; an inward-concaved circular arc surface is arranged on each conical surface; inverted R angles are formed between the upper side and the lower side of each circular arc surface and the corresponding conical surface. The flaring die for the 15-degree DC non-inner tube wheel rim, disclosed by the invention, is used for flaring the 15-degree DC non-inner tube wheel rim series, so that a frictional force of the die on the surface of a workpiece in a flaring process is effectively reduced, strain is controlled, the appearance quality of a product is remarkably improved, and the quality of the product is improved; meanwhile, the service life of the die also can be prolonged.

Description

technical field [0001] The invention relates to the field of tubeless wheels, in particular to a 15°DC tubeless wheel rim flaring mold. Background technique [0002] Flaring is an important process in the rim forming process of steel wheels, which is closely related to the final forming quality of the rim and also affects the scrap rate of materials. During the rim forming process, the two ends of the cylindrical workpiece need to be flared into a bell-shaped shape through the rim flaring die. The structure of the existing rim flaring die is as shown in Zhang Yiqing and Chen Zhihao's Chinese invention patent "A Kind of Passenger Car Steel Wheel Rim Flaring Die" with the publication number CN201625710U. It mainly includes upper and lower mold bases, which are respectively embedded in the The upper and lower mold inserts of the grooves on the outer surfaces of the upper and lower mold cores, and the outer surfaces of the inserts are tapered surfaces. During use, put the cyli...

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Problems solved by technology

However, since the outer surface of the insert is a conical surface, during the extrusion process, the inner surface of the workpiece often suffers from strain during the interaction between the inner wall of the workpiece and the surface of the flared die, which has a serious adverse effect on the appearance and quality of the product and affects the product quality. , and even lead to waste

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