Gas injection dry drilling system

Abstract

The invention relates to the field of machining of aeronautic structural components, in particular to a gas injection dry drilling system. The system comprises a storage device, a pressure source, a mixing portion and a drill bit. Oil is stored in the storage device, the pressure source is used for outputting gas with pressure, the mixing portion enables the storage device and the pressure source to be communicated and can mix oil with gas, the drill bit is driven by an independent power source, a channel is arranged in the drill bit, one end of the channel is communicated with the bottom of the drill bit, and the other end of the channel is communicated with the mixing portion. The gas injection dry drilling system aims at overcoming the defects in the prior art, and the gas injection dry drilling system is applicable to machining of the aeronautic structural components and better in drilling effect, and enables the service life of a hole to be longer.

Description

technical field [0001] The invention relates to the field of aerospace structural parts processing, in particular to a gas jet dry drilling system. Background technique [0002] Drilling refers to the operation of machining a hole in a solid material with a drill bit; [0003] For the traditional drilling process, generally speaking, when drilling, either the process hole is drilled for the convenience of subsequent processing, or the assembly hole is drilled for later cooperation with other components or other uses; [0004] For these two cases, when drilling process holes, the requirements for the holes are very low. It is only necessary to roughly ensure that the position and diameter of the holes meet the subsequent processing. When drilling assembly holes, only the requirements for the hole diameter and the axis of the hole are met. s position; [0005] However, in the field of aviation, since aeronautical structural parts need to be used in high altitudes, with high ...

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Problems solved by technology

[0006] In the traditional way, the assembly can only be guaranteed after processing, but the flatness of the inner wall of the hole cannot be guaranteed. In the traditional processing drilling, there will be a lot of drilling chips, which will be discharged into the hole with the rotation of the drill bit and washed away by mineral oil. , when drilling, only a small amount of oil enters the hole, and the drill cuttings exist between the drill bit and the inner wall of the hole. The flatness mentioned above will affect the service life of the hole on the aerospace structural parts. Perhaps the positioning and assembly are no problem, but after assembly, there will be irregular gaps between the inner wall of the hole and other assembly parts, and there will be redundant Air, in the environment of high heat, high vibration, and high pressure, will greatly affect the service life of the hole (for example, when there is air, under high heat, the expansion of air will cause the hole and its assembly to a certain extent loose between components), causing safety hazards;

[0007] At the same time, the instantaneous temperature of the drilling process is also very high, and the high temperature will also affect the quality of the inner wall of the hole. The impact may be small, but in the aviation field, in the harsh environment of use in the future, it is easy to amplify this quality. The use effect brought by the gap will also cause safety hazards

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