Hollow knife handle with spindle direct-connection transmission mode adopting ultralow-temperature medium

Abstract

The invention discloses a hollow knife handle with a spindle direct-connection transmission mode adopting an ultralow-temperature medium, and belongs to the technical field of numerical-control machine tools, and relates to the hollow knife handle with the spindle direct-connection transmission mode adopting the ultralow-temperature medium. The hollow knife handle comprises a knife handle main body, a high-performance heat insulating part and a multi-layer sealing structure, wherein in the high-performance heat insulating part, a heat-insulating sleeve and a guide tube are made of a material with low temperature resistance and a low heat conduction coefficient; both the heat insulating sleeve and the guide tube are hollow structures, and are sequentially mounted in the knife handle main body to form an ultralow-temperature medium hollow channel of the knife handle device to isolate heat conduction between the ultralow-temperature medium and the knife handle main body; and in the multi-layer sealing structure, three sealing rings and a flooding plug are low-temperature-resistant sealing rings, so that multi-layer ultralow-temperature sealing is formed, and radial sealing for the ultralow-temperature medium is realized. The hollow knife handle is directly connected with a hollow type main shaft, so that function integration is good, a vaporization rate, in the knife handle, of the ultralow-temperature medium is reduced, and cooling efficiency is improved. The knife handle is free of frosting, is convenient to dismount, and is safe and reliable to operate.

Description

Technical field [0001] The invention belongs to the technical field of numerical control machine tools, and relates to a hollow tool holder with a direct connection transmission type of a spindle adopting an ultra-low temperature medium. Background technique [0002] Ultra-low temperature cooling is applied to the cutting area, such as liquid nitrogen, which has a boiling point of -196°C under normal pressure, which can effectively reduce the extremely high cutting heat of titanium alloy and other difficult-to-machine materials in the cutting process, improve the cutting performance of the material, and improve the tool Longevity, and replace traditional cutting fluid to achieve green manufacturing. Internal spray cooling is a relatively advanced method of applying ultra-low temperature medium. The processing machine tool needs to spray the ultra-low temperature medium through the spindle, tool holder and the hollow channel inside to the blade-workpiece contact area to directly c...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to overcome the deficiency of the existing tool handle device, aiming at the problem that the conventional inner-cooled CNC tool handle has poor heat insulation and sealing performance, which makes it unable to be suitable for ultra-low temperature medium hollow transmission, and invented a kind of ultra-low temperature medium spindle straight With transmission hollow tool holder

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