Online reduction method and device for additive composite manufacturing stress based on symmetric high-frequency vibration

Abstract

The invention belongs to the technical field of residual stress reduction, and relates to a large thin-walled part additive composite manufacturing stress online reduction method and device based on symmetric high-frequency vibration. The method comprises the specific steps that frequency sweeping vibration is conducted on a base body, and the inherent frequency of the base body is obtained; process parameters of an upper-end vibration device and a lower-end vibration device are obtained; after additive manufacturing is started, firstly, the lower-end high-frequency vibration device is used for conducting vibration aging on the base body part; and along with the increase of the height of a workpiece, when the height reaches a preset height (namely the upper-end vibration device can clamp the workpiece), the upper-end high-frequency vibration device is started to vibrate and age the workpiece. According to the online reduction method and device for the additive composite manufacturing stress based on the symmetric high-frequency vibration, four high-frequency vibration sources are arranged at a joint of the base body and the additive manufacturing workpiece, so that the vibration superposition effect is achieved, the amplitude of high-frequency vibration is improved, energy input is increased, then the residual stress reduction effect is regulated and controlled, and therefore on-line reduction of the composite additive manufacturing stress of the large thin-walled workpiece is achieved.

Description

technical field [0001] The invention belongs to the technical field of additive composite manufacturing, and in particular relates to an online stress reduction method and device in the additive composite manufacturing of large thin-walled parts. Background technique [0002] With the development of additive manufacturing technology, it has been more and more used in the manufacturing and maintenance of large and complex components in aerospace, marine engineering and other equipment fields. Combined with the rapid manufacturing needs of large and complex components such as aircraft panels and engine blisks, the composite manufacturing technology of casting and forging + additive manufacturing has become the most potential solution. , wall plate structures of different sizes, additive manufacturing of blisk blades on the forging base, etc. With the layer-by-layer forming of the additive manufacturing structure, the temperature gradient between the formed structure and the s...

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Problems solved by technology

This method interrupts the forming manufacturing many times, which seriously affects the manufacturing efficiency; in addition, the metal additive manufacturing needs to purify the processing atmosphere, and the atmosphere is filled and exhausted many times to purify the atmosphere, which also increases the manufacturing cost.

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