The invention relates to a hammering device for influencing the subsurfaces of workpieces comprising a beating tool for acting on the workpiece, a beating mechanism which has a first beater for producing a beating pulse on the beating tool, and a drive for driving the beating mechanism, wherein the beating mechanism has at least a second beater for producing a beating pulse on the beating tool. According to the invention, it is intended for the beating mechanism to comprise a drive shaft that extends along a drive axis and a wobble ring for transforming a rotational movement of the drive shaft into a translational movement, and the first beater and the second beater to be driven by the wobble ring.

Provided is a bilateral ultrasonic rolling processing track coordination method for a blade surface, the method comprising: step S1, performing layering processing on a blade to acquire a contour curve of A-shaped and n-shaped blade edges of a blade model at different heights; step S2: determining the endpoints of a blade processing track; and step S3: planning the thickness and the rotation angle of the blade, comprising: step S31, solving a main direction angle .sub.main of the contour curve; step S32, solving the thickness d of the blade; step S33, solving a rotation angle required by blade processing when the blade edge is A-shaped; and step S34, solving the rotation angle required by blade processing when the blade edge is n-shaped. According to the method, blade deformation generated by an ultrasonic rolling force is reduced, the processing efficiency is improved, and the blade processing precision is also improved.

A preventive maintenance method includes performing abrasive blast-cleaning; performing shot peening: applying a fluorescent coating material before the shot peening is performed; and irradiating a portion applied with the fluorescent coating material with an ultraviolet ray after the shot peening is performed. Coverage is calculated based on a residual fluorescent coating material that fluoresces.

A preventive maintenance method includes performing abrasive blast-cleaning; performing shot peening: applying a fluorescent coating material before the shot peening is performed; and irradiating a portion applied with the fluorescent coating material with an ultraviolet ray after the shot peening is performed. Coverage is calculated based on a residual fluorescent coating material that fluoresces.

There is provided a method for processing a raceway groove configured to circumferentially form a to-be-processed side raceway groove on a surface to be processed of a workpiece, the to-be-processed side raceway groove is configured to be brought into rolling contact with a rolling element, and the surface to be processed is a cylindrical circumferential surface. The method for processing a raceway groove includes: arranging a processing rolling element rotatably between the to-be-processed side raceway groove and a tool side circumferential surface which is opposed to the surface to be processed and which is a cylindrical circumferential surface of a machining tool; rotating the machining tool relatively with respect to the workpiece; and performing a burnishing process on the to-be-processed side raceway groove.

A method of cavitation peening may include coupling a moveable water source to a portable nozzle, through a flexible conduit. The method may include positioning the nozzle adjacent a treatment surface and discharging a first and second stream of fluid through a first and second channel of the nozzle, with the second channel concentrically positioned around the first channel. The first stream may have a first pressure, and the second stream may have a second pressure, the first pressure being greater than the second pressure and the two streams combining to generate a cloud of cavitation bubbles.

A method of cavitation peening may include coupling a moveable water source to a portable nozzle, through a flexible conduit. The method may include positioning the nozzle adjacent a treatment surface and discharging a first and second stream of fluid through a first and second channel of the nozzle, with the second channel concentrically positioned around the first channel. The first stream may have a first pressure, and the second stream may have a second pressure, the first pressure being greater than the second pressure and the two streams combining to generate a cloud of cavitation bubbles.

An electromagnetic hammer device adapted to provide non-contact mechanical treatment of a material in planar items, cylindrical items, or tubular items including a conductor provided along a predetermined path within the material being treated and being supplied with a first pulsed current and a second linearly configured conductor or V-shaped conductor or conductive tube lined on top of conductor and being supplied with a second pulsed current, a layer of insulating material being lined intermediately between the first and second conductors. The simultaneous application of the first and second pulsed currents in the same direction results in exerting tensile forces onto the material and application of the currents in opposite directions results in exerting compressive forces therein. A pair of auxiliary conductors is preferably provided in each side of the second conductor, which provides adjustment of the angle in which the tensile or compressive forces are applied. A method for the mechanical treatment of a material using the hammer device.

An electromagnetic hammer device adapted to provide non-contact mechanical treatment of a material in planar items, cylindrical items, or tubular items including a conductor provided along a predetermined path within the material being treated and being supplied with a first pulsed current and a second linearly configured conductor or V-shaped conductor or conductive tube lined on top of conductor and being supplied with a second pulsed current, a layer of insulating material being lined intermediately between the first and second conductors. The simultaneous application of the first and second pulsed currents in the same direction results in exerting tensile forces onto the material and application of the currents in opposite directions results in exerting compressive forces therein. A pair of auxiliary conductors is preferably provided in each side of the second conductor, which provides adjustment of the angle in which the tensile or compressive forces are applied. A method for the mechanical treatment of a material using the hammer device.

A robotised hammering method for hammering a weld seam (C) made on a base surface (S) of a metal workpiece (V) using a robotised system (32), comprising the following steps:controlling the robotised system (32) provided with an effector (35; 38) carrying a scanning tool (30) in such a way as to follow, with the scanning tool (30), an initial path along the weld seam (C), said initial path having been determined from the digital model of the workpiece or from the actual workpiece,acquiring, by means of the scanning tool (30), along the initial path, local data concerning the elevation and position of the weld seam and of the area or areas of the base surface close to the weld seam,calculating, from the elevation and position data acquired in this way and from the initial path, a corrected path, andcontrolling the robotised system (32) provided with an effector (40; 38) carrying a hammering tool (41) to hammer the weld seam along this corrected path.