Ice immobilization machining method for metal honeycomb workpiece

Abstract

The invention provides an ice immobilization machining method for a metal honeycomb workpiece, belongs to the field of machining technological methods and relates to a machine tool fixture device and a machining method for immobilizing a metal honeycomb material through an ice immobilization manner to achieve ultralow-temperature cutting. The method comprises the steps that after metal honeycomb holes arranged in a metal honeycomb ice immobilizing fixture are filled with low-temperature pure water or cutting liquid, the metal honeycomb ice immobilizing fixture is arranged in an adjustable refrigerating testing cabinet, and the freezing temperature and the refrigerating time are set; and then the metal honeycomb ice immobilizing fixture is clamped to a machine tool worktable, metal honeycombs are machined through a liquid nitrogen internal spraying cutter, and the freezing state is maintained through liquid nitrogen external spraying. The method achieves the purpose of clamping of the metal honeycomb workpiece difficult to machine, the freezing temperature of the pure water or the cutting liquid and the temperature maintaining degree are effectively controlled, the machining immobilizing effect can be better, and the cutting precision is improved; and the operation of the method is convenient, the immobilizing effect is stable, the machining efficiency is high, and the machining effect is good.

Description

technical field [0001] The invention belongs to the field of mechanical processing techniques, and relates to a machine tool tooling device and a processing method for holding metal honeycomb materials in an ice-holding manner to realize ultra-low temperature cutting. Background technique [0002] At present, metal honeycomb materials are widely used in the fields of aerospace, aviation and shipbuilding. Good adaptability and other characteristics. The honeycomb is a thin-walled porous structure, the wall thickness is generally less than 0.1mm, and the side length of the cell is generally less than 10mm, so that the honeycomb has a high strength along the cell axis, and the in-plane radial equivalent strength is very small. It is easy to deform under the action of radial force, so the traditional method of clamping solid workpieces cannot be used in machining to achieve clamping. Usually, during honeycomb CNC machining, especially during plane milling, the metal honeycomb ...

AI Technical Summary

Problems solved by technology

However, due to the lack of rigidity of the metal honeycomb material, the device is prone to deformation during processing, which affects the processing accuracy. In addition, the device structure and workpiece clamping are complex and the vacuum degree is difficult to maintain, which limits the reliability and efficiency of clamping for a long time.

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