One-way pressing device for ultrasonically assisted indexable end mill inserts

Abstract

The invention belongs to the field of ultrasonic-assisted forming, in particular to an ultrasonic-assisted one-way pressing device for indexable end mill blades. The one-way pressing mold includes an ultrasonic transducer, an upper pressure head, a mold, a transducer fixing frame, a mold support block, a base connecting bolt, a base, a core column, a milling cutter blade blank, and a lower pressure head; the mold support block is laid flat On the center of the base, the mold is placed above the mold support block, the outside of the mold is connected with an ultrasonic transducer, the mold is an integrated structure, and the inside is provided with a mold hole that penetrates up and down. Indenter, the mold cavity after the upper indenter and the lower indenter are matched with the shape of the blank of the milling cutter blade, and in the pressing process, the mold supporting block bears the pressure in the pressing process. The pressing device provided by the present application adopts ultrasonic assistance for pressing. Ultrasonic vibration can promote the movement rearrangement of the green body shared by the cutter, reduce the pressing force, facilitate the pressing of the green body, and increase the density of the green body.

Description

technical field [0001] The invention belongs to the field of ultrasonic-assisted forming, in particular to an ultrasonic-assisted one-way pressing device for indexable end mill blades. Background technique [0002] Unidirectional compression molding technology is the simplest and most intuitive molding method. Pour the prepared powder into a mold of a certain shape, and press the powder into a green body with the help of external pressure on the plug. Due to its low cost, convenient maintenance, and simple equipment, process and molds, the one-way press molding technology has been widely used in traditional blade production. Due to the limitation of powder deformation and densification by the friction of the mold during unidirectional compression molding, the stress field in the molded part is almost always inhomogeneous. [0003] Ultrasonic assisted pressing technology is a kind of unidirectional or multidirectional complex ultrasonic external field applied to the outer p...

AI Technical Summary

Problems solved by technology

[0004] Due to its complex structure and blade shape, the complex tool further aggravates the unevenness of the green body density distribution

This non-uniform density distribution will lead to inconsistent shrinkage of the blade during sintering, which is more likely to cause distortion and cracking of the blade, impairing the performance of the blade

[0005] Due to the complex shape of the indexable end mill blade, the flow performance of the powder during the pressing process is poor, resulting in the low density of the edge part of the green body of the end mill blade and the uneven overall density distribution of the green body

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