Die with roller inner rib rotating and extruding function and molding method thereof

Abstract

The invention relates to a die with a roller inner rib rotating and extruding function and a molding method thereof. According to the technical scheme, the die with the roller inner rib rotating and extruding function comprises a split male die, an upper female die, a key, a lower female die, a rotary plate, a tray, a sand core lining and a steel ring lining, The tray is arranged at the bottom ofthe lower female die and is connected with the rotary plate through a sliding key. The bottom surface of the lower female die is connected with the rotary plate. The upper female die is connected to the lower female die through bolts. The sand core lining is mounted in an inner cavity of an extruded conical barrel blank. The steel ring lining is arranged on the periphery of the upper end surface of the sand core lining. The split male die is mounted on an upper die base. The molding method comprises the steps that the die with the roller inner rib rotating and extruding function is mounted onan extruding rotating machine, thus the rotary plate is connected with an extruding rotating power system of the extruding rotating machine, then the conical barrel blank is put into an inner cavity of the upper female die and an inner cavity of the lower female die, the sand core lining and a steel body lining are sequentially placed in an inner cavity of the conical barrel blank, and the split male die is descended to a groove position of the inner wall of a barrel in a combined state, so that rotating and rolling forming is conducted.

Description

technical field [0001] The invention relates to a mold with rollers for rotary extruding inner ribs and a forming method thereof, belonging to the technical field of rib forming devices and forming methods for the inner wall of cylindrical parts. Background technique [0002] Large cylindrical parts are widely used in navigation, aerospace, military and other fields. The forming of the inner ring rib on the inner wall of the large cylindrical part is the technical bottleneck of the plastic forming of the large cylindrical part. [0003] The internal ribs of traditional large-scale cylindrical parts are usually welded or integrally cast to form ribs. The internal ribs formed by these two ribbing methods are too low in compressive capacity to withstand large loads and cannot meet high fatigue requirements. Performance requirements, in order to improve the performance of inner ribs, forging must be used to integrally form large workpieces and inner ribs, but the bottleneck of ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of complex forming operation process, low forming efficiency, easy wrinkling and high forming pressure existing in the existing inner transverse rib extrusion mold, and to provide a mold with rollers for rotating inner rib and its forming method

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