Hole milling device

Abstract

The invention belongs to the technical field of hole milling, and particularly relates to a hole milling device. The hole milling device is good in cooling effect. The hole milling device comprises atool handle 7 with external cooling converted to internal cooling, a liquid nitrogen container, an electromagnetic valve and a flow regulating valve. According to the structural main points of the hole milling device, a milling tool is installed on the tool handle 7 with external cooling converted to internal cooling, the liquid nitrogen container, the electromagnetic valve, the flow regulating valve and the tool handle 7 with external cooling converted to internal cooling are connected in sequence, a liquid nitrogen channel is arranged in the milling tool, the upper end of the liquid nitrogenchannel communicates with a cooling liquid inlet, and the lower end of the liquid nitrogen channel communicates with a liquid nitrogen nozzle formed in the lower part of the milling tool.

Description

technical field [0001] The invention belongs to the field of hole milling technology, and in particular relates to a hole milling device. Background technique [0002] Quartz fiber reinforced composite materials have good mechanical properties, high and low temperature resistance, stable physical and chemical properties, etc., and are widely used in aerospace, national defense and military industries. However, since this type of material is mostly an anisotropic and non-uniform laminated material, defects such as delamination, burrs, and ablation inevitably occur in traditional hole-making processes such as milling and drilling. For example, when making large-diameter and deep holes, due to the low bonding strength between fiber layers and high cutting force, severe delamination and burr defects caused by fiber force avoidance will appear at the entrance and exit of the hole. However, during high-speed hole making, due to the low thermal conductivity of the composite materi...

AI Technical Summary

Problems solved by technology

However, due to the fact that this type of material is mostly an anisotropic and non-uniform laminated material, defects such as delamination, burrs, and ablation will inevitably occur in traditional hole-making processes such as milling and drilling.

For example, when making large-diameter and deep holes, due to the low bonding strength between fiber layers and high cutting force, serious delamination and burr defects will appear at the entrance and exit of the hole caused by fiber force avoidance

However, during high-speed hole making, due to the low thermal conductivity of the composite material, and the composite material is not easy to use cutting fluid to cool down, the temperature rise in the hole is too high to cause serious ablation defects

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