A thin-walled circular tube extrusion die

Abstract

The invention relates to the technical field of die processing, in particular to a thin-walled circular tube extrusion die, comprising an upper die and a lower die connected to each other; The cross-section in the direction from the feed end to the discharge end of the upper die is fan-shaped, and the inlet side of the diversion port is smaller than the outlet side; the middle part of the diversion port is provided with a tongue core, and the tongue core is self-guided from the diversion port. The direction from the outlet side to the discharge end of the upper die is set, and extends out of the discharge end of the upper die to form a protrusion. The section of the tongue core from the outlet side of the diversion port to the discharge end of the upper die is stepped. Fan-shaped; the beneficial effects of the present invention are: the entrance of the diversion hole of the upper mold adopts a large and wide diversion port, adopts a step-down design to reduce the frictional resistance of metal flow, and the welding chamber of the lower mold adopts the design method of an annular flow blocking wall , changed the metal flow welding and static pressure, the mold structure design is reasonable, the extrusion force is low, the forming is good, and the passing rate of the machine is high.

Description

technical field [0001] The invention relates to the technical field of die processing, in particular to a thin-walled circular pipe extrusion die. Background technique [0002] In recent years, aluminum alloy extruded profiles have been more and more widely used in various fields such as building curtain walls, industry, automotive lightweight, aerospace, and smart all-aluminum homes. The deep processing of aluminum profiles is developing rapidly in the direction of high precision. It is widely used in various aluminum structural parts and connectors, and puts forward higher requirements for the precision, mechanical properties and appearance of aluminum profile products. High-precision thin-walled round tubes are used to make high-precision telescopic ladders. They are mainly used as the load-bearing frame of telescopic escalators. They are assembled by cross-sections of more than a dozen high-precision round tubes with different diameters. The accuracy, strength, and wall ...

AI Technical Summary

Problems solved by technology

At present, the extrusion dies used to produce high-precision thin-walled round pipes often encounter the influence of metal flow welding and static pressure in the actual production process. The extrusion force is large, resulting in weld seams, extrusion lines and friction lines on the surface of the profile. and other defects, and the frictional resistance of metal flow is relatively large in the manufacturing process

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