A method and apparatus for finishing a surface of a component. The method includes installing the component in an apparatus configured to deliver a flow of abrasives to the surface and to generate cavitation bubbles in a liquid contacting the surface using a cavitation generator that includes an ultrasonic generator configured to generate cavitation bubbles in the liquid contacting the surface by ultrasonic excitation in the liquid or a laser configured to generate cavitation bubbles in the liquid contacting the surface by laser excitation in the liquid; controlling the cavitation generator such that cavitation bubbles are generated to finish the surface by implosion of the cavitation bubbles; and controlling the flow of slurry to the surface so as to finish the surface by abrasion. An apparatus for finishing a surface of a component is also disclosed.

A method for separating a first mechanical part from a second mechanical part is described, wherein the second mechanical part is bonded to the first mechanical part by an adhesive film along a connecting area, the first mechanical part having a first specific thermal conductivity and the second mechanical part having a second thermal conductivity that is higher than the first thermal conductivity. The method includes at least one cooling step during which the second mechanical part is cooled to a negative temperature and at least one stressing step during which the second mechanical part is subjected to mechanical stress in order to cause the adhesive film to break.

A method for separating a first mechanical part from a second mechanical part is described, wherein the second mechanical part is bonded to the first mechanical part by an adhesive film along a connecting area, the first mechanical part having a first specific thermal conductivity and the second mechanical part having a second thermal conductivity that is higher than the first thermal conductivity. The method includes at least one cooling step during which the second mechanical part is cooled to a negative temperature and at least one stressing step during which the second mechanical part is subjected to mechanical stress in order to cause the adhesive film to break.

A method and apparatus for finishing a surface of a metal component made by additive manufacturing are provided. The method comprises: containing the component 41 in a fluid 43 that comprises abrasive particles 48; and generating pressure fluctuations that produce acoustic cavitation in the fluid by applying ultrasonic vibration into the fluid by an ultrasonic horn 45, thereby removing material from the surface of the component by a combination of cavitation bubble collapse on the surface and the striking of the surface by abrasive particles 48 accelerated by cavitation bubble collapse.

The present invention discloses a multi-dimensional vibration grinding cavity body. By adjusting amplitudes (power) and frequencies of the multi-dimensional ultrasonic vibration source, such that the multi-directional macroscopic flow is formed in the cavity body while keeping the vibration medium to have the original characteristics to improve the performance of grinding of slurry.

An ultrasonic peening-type integrated machining method for cutting and extrusion includes: applying transverse ultrasonic vibration or a vibration component, which is vertical to a cutting speed direction to a cutting tool on a machine tool; setting a cutting parameter and an ultrasonic vibration parameter such that a dynamic negative clearance angle is generated in a cutting procedure and a flank face of the cutting tool conducts ultrasonic peening extrusion on the surface of the workpiece; setting an extrusion overlap ratio; setting a wear standard of flank faces extruded by the cutting tool; controlling a vibration cutting trajectory phase difference of the cutting tool during two adjacent rotations; and turning on the machine tool in order to ensure that cutting and surface extrusion strengthening of the workpiece are completed in one procedure without separate strengthening procedures. The method conducts extrusion strengthening on the surface of the workpiece while cutting the workpiece.

An ultrasonic peening-type integrated machining method for cutting and extrusion includes: applying transverse ultrasonic vibration or a vibration component, which is vertical to a cutting speed direction to a cutting tool on a machine tool; setting a cutting parameter and an ultrasonic vibration parameter such that a dynamic negative clearance angle is generated in a cutting procedure and a flank face of the cutting tool conducts ultrasonic peening extrusion on the surface of the workpiece; setting an extrusion overlap ratio; setting a wear standard of flank faces extruded by the cutting tool; controlling a vibration cutting trajectory phase difference of the cutting tool during two adjacent rotations; and turning on the machine tool in order to ensure that cutting and surface extrusion strengthening of the workpiece are completed in one procedure without separate strengthening procedures. The method conducts extrusion strengthening on the surface of the workpiece while cutting the workpiece.

The impeller comprises: an impeller body (21) which includes a surface part (27) formed to a fixed depth (D) from a surface (21a) thereof, and which is made of Al or an Al alloy; and an NiP-based electroless-plated film (23) covering the surface (21a) of the impeller body (21), wherein the surface part (27) has a first compressive residual stress (P1).

A method and apparatus for finishing a surface of a metal component made by additive manufacturing are provided. The method comprises: containing the component 41 in a fluid 43 that comprises abrasive particles 48; and generating pressure fluctuations that produce acoustic cavitation in the fluid by applying ultrasonic vibration into the fluid by an ultrasonic horn 45, thereby removing material from the surface of the component by a combination of cavitation bubble collapse on the surface and the striking of the surface by abrasive particles 48 accelerated by cavitation bubble collapse.

A device for treating a metal part having an outer surface, includes a chamber, a vibration module including: a generator for generating an electric signal at ultrasonic frequency, a converter for converting the electric signal into a mechanical vibration, the mechanical vibration being transmitted to a sonotrode, the sonotrode positioned in the chamber facing the outer surface of the metal part, projectiles positioned inside the chamber for impacting against the outer surface of the metal part, the projectiles being moved by the vibration of the sonotrode and including a plurality of abrasive media which, when moved by the vibration of the sonotrode, introduce residual compressive stresses and improve the surface condition of the metal part.