Fixed dummy block for aluminum section extruder

Abstract

The invention relates to a fixed dummy block for an aluminum section extruder. The fixed dummy block comprises a fixed pad on an extrusion stem, a screw, an expanding ring and a conical gasket. The fixed pad is connected with the conical gasket through the screw; the expanding ring is arranged outside the fixed pad; and an inner conical surface of the expanding ring is matched with a conical surface of the conical gasket. The fixed dummy block is characterized in that: a conical angle between the inner conical surface of the expanding ring and the conical gasket is 48 to 51 degrees. The fixed dummy block has the advantages that: an angle of the fixed dummy block is reduced so as to make the expansion component force generated by the same extrusion force increased; the expansion deformation of the fixed dummy block can be controlled by adjusting a gap between the gasket and the fixed pad; a deformation working tape of the expanding ring is lengthened; a deformation part of the expanding ring is deepened and thinned and is easy to deform; a proper gap between the expanding ring and an extruding container can be guaranteed; and the service life of the expanding ring is prolonged.

Description

technical field [0001] The invention belongs to extrusion processing of aluminum and aluminum alloy, in particular to an improved fixed extrusion pad of an aluminum profile extruder. Background technique [0002] The extrusion gasket is one of the extremely important extrusion tools in the extrusion machine. When extruding, an extrusion gasket is set between the extrusion rod and the billet aluminum ingot to transmit the extrusion force and seal the extrusion cylinder, so as to avoid the reduction of strength due to the direct contact between the extrusion rod and the high-temperature billet, Prevent the entire extruded rod from being scrapped due to excessive wear and deformation caused by the direct fit between the extruded rod end and the extruded cylinder. In a traditional extrusion machine, generally 2 to 3 movable extrusion pads must be set independently from the extrusion rod without any connection with the extrusion rod, and the movable extrusion pads are recycled t...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the deficiencies in the prior art, and provides a fixed extrusion pad for an aluminum profile extrusion machine. The thickness of the gasket solves the fracture problem; the inner cone of the pad expansion ring and the cone of the cone gasket are reduced The surface angle can make the expansion ring expand in place during extrusion production, and the overflow of aluminum is less; the expansion and deformation of the fixed extrusion pad can be controlled by adjusting the working gap between the cone gasket and the fixed pad.

Images