Aluminum profile extrusion extrusion press stem installation method

The extrusion press stem of aluminum extrusion machine refers to the pressure generated in the main cylinder of the extruder being transmitted to the ingot in the extrusion cylinder, so that the ingot is plastically deformed and flows out from the extrusion die hole to form an extruded product. Squeeze tool. The extrusion rod is divided into hollow and solid. Hollow extruded rods are used in tube press stem extruders. The solid extrusion rod is used for aluminum rod profile extrusion machines. The structure of the extrusion rod is as shown. The squeeze rod is generally a cylindrical overall structure that can be divided into a head, a shaft and a root. On a large tonnage extruder, the extrusion rod is made into a variable cross section to increase the longitudinal bending strength. At this point, the extrusion should have an internal bore of variable cross section. In addition, in order to save the high-grade alloy steel, sometimes the extrusion rod is made into an interference fit type, and the strength of the material for the shaft portion can be higher than that of the root portion.

The outer diameter of the squeeze rod is determined according to the inner diameter of the squeeze press stemrel. The outer diameter of the extrusion press stem of the horizontal extruder is generally proportional. The inner diameter of the cylinder is 4 to 10 mm. The outer diameter of the extrusion press stem of the vertical extruder is 2 to 3 mm smaller than the inner diameter of the cylinder, and the diameter of the inner hole of the pipe extrusion rod should be larger than the outer diameter of the perforated needle.

When the extrusion rod is operated at a high temperature, the end of the extrusion rod may be plastically deformed and be upset. Therefore, the diameter of the end of the solid extrusion rod should be made smaller, and the inner diameter of the end of the hollow extrusion rod should be larger, so as not to be replaced when the large perforation needle is replaced after deformation. In order to avoid stress concentration, the transition portion of the root of the squeeze rod should be tapered and have a large rounded corner with a radius of R ≥ 100 mm. If the arc is too small or the root is not well matched with the diameter of the shaft, the squeeze rod will break.