A device and methods are provided for deep rolling. In one embodiment, a deep rolling tool includes a fork having a base section and a plurality of fork arms, wherein each fork arm extends outwardly from the base section and wherein the fork arms are separated from one another to form an opening. The deep rolling tool may also include a plurality of rolling elements configured to apply a compressive stress to articles received by the deep rolling tool, wherein each rolling element is mounted at the distal end of a fork arm, and wherein each rolling element includes a cantilever shaft retained by a fork arm and a crowned roller.

An apparatus to cut and surface process a workpiece includes a cutting tool to cut the workpiece; a peening tool to peen surfaces of the cut workpiece; and a controller to control the cutting tool, the peening tool and the workpiece to move simultaneously.

An apparatus to cut and surface process a workpiece includes a cutting tool to cut the workpiece; a peening tool to peen surfaces of the cut workpiece; and a controller to control the cutting tool, the peening tool and the workpiece to move simultaneously.

A hammer assembly for a power tool. The hammer assembly provides a first, proximal engagement portion couplable directly to a backside of the power. A second, distal engagement portion is directly connected to the first engagement portion. A head portion is directly connected to the second engagement portion. The second engagement portion provides one or more chambers, each chamber housing a spring for storing energy imparted by compressive forces against the head portion. Each spring directly interconnecting the first and second engagement portions through an open side of the chamber facing the first engagement portion. There is a gap between the first and second engagement portions, between their respective distal and proximal surface, which is spanned by the spring, enabling the latter to deflect before said surfaces contact under compressive loading.

A hammer assembly for a power tool. The hammer assembly provides a first, proximal engagement portion couplable directly to a backside of the power. A second, distal engagement portion is directly connected to the first engagement portion. A head portion is directly connected to the second engagement portion. The second engagement portion provides one or more chambers, each chamber housing a spring for storing energy imparted by compressive forces against the head portion. Each spring directly interconnecting the first and second engagement portions through an open side of the chamber facing the first engagement portion. There is a gap between the first and second engagement portions, between their respective distal and proximal surface, which is spanned by the spring, enabling the latter to deflect before said surfaces contact under compressive loading.

A method of operation is provided during which a tool is arranged with a surface of a component. The tool includes a roller contacting the surface. A rolling operation is performed on the surface using the roller. A vibration operation is performed on the surface through the roller concurrently with the performing of the rolling operation.

A method of weld repairing a cast component includes identifying a repair zone on the cast component. The repair zone represents a region of a cast substrate of the cast component requiring a directed energy deposition repair operation. A surface preparation operation is performed on the repair zone before performing the directed energy deposition repair operation. The surface preparation operation imparts a pre-selected level of compressive residual stress to the repair zone. The directed energy deposition repair operation is performed on the repair zone without formation of microcracks in a heat affected zone adjacent to the repair zone. The directed energy deposition repair operation includes formation of a directed energy deposition deposit on the cast substrate.

The present disclosure relates to a method of treating a cutting tool of a cemented carbide or cermet substrate, wherein the cutting tool is subjected to shot peening at a temperature of or above 100 C. The cutting tool typically has a rake face, a flank face and a cutting edge extending therebetween. The shot peening is performed at least on the rake face of the cutting tool. The present disclosure also relates to a cutting tool treated with the method.

A cavitation surface processing nozzle includes: a nozzle tip including a first plane from which liquid is ejected and perpendicular to an ejection axis; a second plane perpendicular to the ejection axis and another side plane of the first plane; and a nozzle hole including a discharge groove located on the first plane and having a semi-cylindrical shape extending in a first direction perpendicular to the ejection axis, an ejection hole extending along the ejection axis to be connected to the discharge groove and having a right elliptic cylindrical shape having an elliptic cross section with a long diameter extending in the first direction, and an introduction portion having a right conical surface centered on the ejection axis and connected to the ejection hole.

A cavitation surface processing nozzle includes: a nozzle tip including a first plane from which liquid is ejected and perpendicular to an ejection axis; a second plane perpendicular to the ejection axis and another side plane of the first plane; and a nozzle hole including a discharge groove located on the first plane and having a semi-cylindrical shape extending in a first direction perpendicular to the ejection axis, an ejection hole extending along the ejection axis to be connected to the discharge groove and having a right elliptic cylindrical shape having an elliptic cross section with a long diameter extending in the first direction, and an introduction portion having a right conical surface centered on the ejection axis and connected to the ejection hole.