A wave cutting and extrusion hole fine strength integrated processing method

Abstract

The invention relates to a fluctuating integrated processing method for cutting and extruding holes, which includes: configuring a machine tool according to a preset strategy for manufacturing reinforced holes, and the machine tool controls the integrated hole making of tools according to the strategy; and in the process of manufacturing holes, by means of Ultrasonic frequency elliptical vibration realizes the cutting and squeezing operation of the tool, and creates a negative relief angle area on the flank flank of the tool to impact and strengthen the hole surface of the processed part of the hole; the strategy for manufacturing the strengthened hole includes: used to make the main cutting of the tool Intermittent cutting of the edge reduces the cutting force and improves the phase difference of the machining accuracy, which is used to make the side edge flank of the tool produce the amplitude of the elliptical vibration in the negative clearance angle area during the hole making process. The processing method provided by the invention can take into account the precision of the hole, the surface roughness of the hole and the strengthening of the hole subsurface, and can simultaneously complete the cutting and strengthening of the hole in one process, so that the processed hole can meet the industrial requirements.

Description

Technical field [0001] The present invention belongs to the field of machining, aperture and aperture, and more particularly to a fluctuating type cutting hole precision integrated processing method. Background technique [0002] The aircraft accident caused by the current structure connection site accounted for about 70% of the total of the aircraft accident, which was fatigued by the structural components caused by stress concentrations as the main reason for the failure of the connection site. Therefore, the quality of the aperture process largely determines the quality of the aircraft. Improve the quality of the fastening holes, improve the anti-fatigue performance of the aircraft structure, extend the service life, is an important research topic of design and material researchers. [0003] The current hole in the field is the most widely used sewing lining cooling squeezed, which is inserted in the surface of the holes to be inlaid, and the hole is refrigerated using a mandr...

AI Technical Summary

Problems solved by technology

However, high-power lasers, high operating costs, and the instability of the production process limit the application of laser shock processing in aircraft components

[0004] In addition, studies in recent years have shown that the surface roughness, dimensional accuracy, and geometric accuracy of holes are also positively correlated with the fatigue life of mechanical connection parts, and the above-mentioned hole strengthening methods cannot improve the hole accuracy, and even shot peening, laser strengthening, etc. It will also destroy the surface integrity of the hole surface, increase the surface roughness of the hole, and offset the gain of residual compressive stress on fatigue life

[0005] To sum up, the current hole strengthening processes have defects or development limitations, and none of them can take into account the hole making precision and surface roughness. Accuracy, surface roughness and strength requirements seriously reduce processing efficiency

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