Machining Method of Large Thickness-diameter Ratio Plate Round Hole

Abstract

The invention provides a method of using a water cutting machine to process a round hole on a plate with a large thickness-to-diameter ratio, and controls the nozzle of the water cutting machine to move in the horizontal direction along a predetermined line to realize two cuts on the round hole. For multiple circular holes with fixed relative positions on the plate, the method of setting a base point is used to control the nozzle to cut the plate along the line formed by multiple circular lines starting from the base point, and cut each circular hole twice. According to the processing steps of the method, a plurality of circular holes with fixed relative positions can be processed on the plate, and the aperture and roundness of each circular hole can be guaranteed to meet the precision requirements. In short, this method can be used to process assembly holes on skins with large thickness-to-diameter ratios in the aerospace field, and ensure that the assembly holes meet the specifications, and has high production efficiency, high degree of automation, and high precision of the processed assembly holes without relying on mould, the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of plate perforation, and in particular relates to a processing method for round holes in a plate with a large thickness-to-diameter ratio in the field of aerospace, and can also be used in other fields. Background technique [0002] The skin is a key part to maintain the shape of the launch vehicle, withstand a certain amount of aerodynamic force, and protect the internal structure of the rocket. Its thickness is between 0.8 and 4mm. In the prior art, for skins with a thickness between 0.8mm and 2mm, a laser cutting machine can be used for plane processing; for thick skins with a thickness greater than 2mm, a CNC punching machine is used to punch holes in the skin. [0003] Chinese patent CN103230975A discloses a thin plate punching method, the steps of which are: making a stamping die for a thin plate, and setting concave and convex points at the corresponding positions of the stamping die body and the thin plate to...

AI Technical Summary

Problems solved by technology

When using this method to punch the skin, it is only applicable to the case where the diameter of the assembly hole is larger than the material specification (that is, the thickness-to-diameter ratio is less than 1). Due to equipment structure and parameter limitations, the holes processed by this method cannot meet the specifications and standards, and further manual operations are required. Moreover, this method will not only cause local deformation of the material, but also cause damage to the punch itself, and it depends on the mold and hole specifications. Can't choose flexibly

[0004] Therefore, when processing assembly holes on skins with large thickness-to-diameter ratios, if CNC punching machines are still used, there will inevitably be disadvantages such as poor product accuracy, low production efficiency, high labor intensity, and high production costs, making it difficult to meet the needs of product production and development.

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