65 results about "Ultrasonic shot peening" patented technology

The invention discloses an ABAQUS-based finite element simulation method of correcting welding deformation through ultrasonic shot-peening. The method includes: firstly, utilizing the finite element software ABAQUS to simulate the welding process of a certain-sized aluminum alloy sheet to obtain the distribution of the welding residual stress and the deformation;and secondly, reading in a stress force and deformation grid and performing the simulative computation of a shot-peening shape correction process on the basis of the welding stress and deformation. The ABAQUS-based finite element simulation method of correcting the welding deformation through the ultrasonic shot-peening takes the limits that the complexity of mechanism of the shot-peening process and the influence of various variable factors result in great difficulties in optimizing shot-peening process parameters and the method which purely relies on experimental data and experience consumes much time and money into consideration, so that the ABAQUS-based finite element simulation method is introduced to assist the selection of the ultrasonic shot-peening process parameters and the strain of the stress and the change of the deformation are analyzed to explain the mechanism of the shape correction.

Ultrasonic peening treatment is desirable where an application of a compressive stress is helpful to reduce the incidence of crack formation on highly stressed parts. Ultrasonic peening treatment can be performed in field applications without requiring a rotor to be removed from the machine. The system includes an acoustic element that excites peening media within a peen chamber. A frame is attachable to an assembled turbine rotor component and includes support structure engageable with the acoustic element. The frame is cooperable with a chamber tooling that defines and encloses the peen chamber together with the turbine rotor component.

The invention relates to a reflective ultrasonic shot-peening strengthening device for the inner hole surface. The ultrasonic shot-peening strengthening device for the inner hole surface includes a cover plate, a workbench and an ultrasonic vibrating head. The workbench is provided with a positioning hole and has The part to be processed through the hole is fixed on the workbench through the fixture, the ultrasonic vibration head is movably installed in the positioning hole, and the through hole of the part to be processed corresponds to the positioning hole, so that the After passing through the positioning hole, the ultrasonic vibration head enters the through hole from the lower port of the through hole, the cover plate is fixed above the part to be processed, and the upper port of the through hole is blocked by the cover plate to form a closed cavity. A number of shot blasts are placed in the cavity, and the lower surface of the cover plate is provided with a protruding piece, and the protruding piece protrudes downwards and enters the through hole. The ultrasonic shot peening strengthening device of the present invention has the advantages of low energy consumption, space saving, low environmental pollution, less shot peening consumption and good strengthening effect on the inner hole surface of parts.

The invention relates to a planar array type ultrasonic shot peening strengthening device and method. The ultrasonic shot peening strengthening device includes: an array of ultrasonic vibration equipment, a shot peening chamber and a workbench, and the array of ultrasonic vibration equipment is composed of a plurality of ultrasonic vibration equipment. The vibrating heads of multiple ultrasonic vibration equipment are arranged and installed on the vibrating head clamping device, the shot blasting chamber is installed on the workbench, and the vibrating heads of multiple ultrasonic vibrating equipment can move through the bottom of the workbench and extend into the blasting chamber. in the pill chamber. The present invention adopts the mode of forming an array of vibrating heads of a plurality of ultrasonic vibrating devices, which reduces the surface roughness of the strengthened parts, reduces the usage of projectiles, improves the efficiency of shot peening, and reduces energy consumption.

The present invention relates to a method for ultrasound shot-blasting by means of a cloud of balls set in motion through contact with a sonotrode having one metallic surface including an area of difficult access. It is characterized in that the surface is that of a hook axially restrained on a turbomachine blade including a groove (5) provided between the hook and the base of the blade, and a surface portion (7) outside said groove, and the cloud of balls is contained in a chamber (25) encompassing said groove and said surface portion (7) outside said groove.

The embodiment of the invention relates to a piezoelectric vibrator array type ultrasonic shot peening strengthening device. The piezoelectric vibrator array type ultrasonic shot peening strengtheningdevice comprises a supporting device, a shot peening chamber, piezoelectric ultrasonic vibrators and a vibration excitation sheet, wherein the supporting device comprises a shot peening chamber clamping plate, a transducer clamping plate, a bottom plate and a supporting rod; the transducer clamping plate is connected with the shot blasting chamber clamping plate and the bottom plate through supporting rods so as to provide sufficient space for mounting of the shot blasting chamber and the piezoelectric ultrasonic vibrators; the output ends of the piezoelectric ultrasonic vibrators extend intothe shot blasting chamber; an vibration excitation sheet is connected to the output ends of the piezoelectric ultrasonic vibrators; and a plurality of shots are laid on the side, far away from the output ends of the piezoelectric ultrasonic vibrators, of the vibration excitation sheet. The piezoelectric ultrasonic vibrators convert an ultrasonic frequency electric oscillation signal input by an ultrasonic power supply into a mechanical vibration signal with the same frequency, and acts on the vibration excitation sheet after the amplitude is amplified; and the vibration excitation sheet vibrates at high frequency to drive the shots to repeatedly impact the surface of a workpiece to be machined, so that the shot blasting quality and the shot blasting efficiency of an ultrasonic shot peening device are improved.

The invention discloses an ultrasonic shot blasting efficient and uniform processing system for various molded surfaces. The system comprises a workpiece clamping mechanism, a working table and a first connecting member arranged on the working table, a first vibration amplitude transformer, a mixer, a shot blast filling device, a jet mechanism, a driving mechanism, and a control system; a pair ofoppositely positioned first piezoelectric actuators are arranged at the first vibration amplitude transformer; the mixer is located above the first vibration amplitude transformer, and is used for mixing the compressed gas and the shot blast, the shot blast is sprayed to the end surface of the first vibration amplitude transformer, and the shot blast is accelerated by end surface rebounding to process a workpiece at a lower part; The workpiece clamping mechanism includes a second connecting member, a second vibration amplitude transformer, the second vibration amplitude transformer is mountedwith a second piezoelectric actuator, and is capable of generating axial-bending-torsional coupling vibration. The system can improve the speed of shot blast processing, under the action of the vibration of the second vibration amplitude transformer, the workpiece is uniformly processed at a high speed, and efficient processing of the workpiece is realized.

The invention relates to a shot peening forming method for prolonging the fatigue life of a ribbed integral panel. Barrier strips at the two sides of a rib top are clamped, groove bodies are formed on the barrier strips, and shot peening forming is cairred out on shots in an area limited by the groove bodies by using shot peening equipment with the shot diameter of 1-6mm; the barrier strips are detached, metal sliding blocks are clamped to the two sides of the rib top, and sliding block grooves are formed in the metal sliding blocks; ultrasonic shot blasting equipment with the diameter of a spray needle being 2-6 mm is used, and the spray needle is sprayed and shaped in an area limited by the sliding block groove; and in the machining process, the metal sliding blocks are moved in the length direction of the rib top till the shape of the area to be subjected to shot peening forming machining on the rib top is corrected. According to the method, the surface quality of the rib top is effectively protected, reasonable shot peening strengthening parameters are combined, the fatigue life of the rib can be greatly prolonged, and application of the shot peening forming technology to the complex ribbed integral wall plate is expanded.

An ultrasonic peening method which, in order to improve the fatigue strength of the weld (3) between a floating building (1) and a structure (2) welded to the floating building (1), applies an impact to the weld (3) by a pin (4) vibrated by an ultrasonic wave. The ultrasonic peening method comprises: a building construction step for constructing the floating building (1); a structure welding step for attaching the structure (2) to the floating building (1) by welding; a building launching step for lowering the floating building (1), to which the structure (2) has been attached, into water; and an ultrasonic peening step for applying ultrasonic peening to the weld (3) of the floating building (1) having buoyancy.

An ultrasonic peening method which, in order to improve the fatigue strength of the weld (3) between a floating building (1) and a structure (2) welded to the floating building (1), applies an impact to the weld (3) by a pin (4) vibrated by an ultrasonic wave. The ultrasonic peening method comprises: a building construction step for constructing the floating building (1); a structure welding step for attaching the structure (2) to the floating building (1) by welding; a building launching step for lowering the floating building (1), to which the structure (2) has been attached, into water; and an ultrasonic peening step for applying ultrasonic peening to the weld (3) of the floating building (1) having buoyancy.

The invention discloses a workpiece shape correcting method and a workpiece shape correcting device. The workpiece shape correcting method comprises the steps that a to-be-corrected workpiece is measured, the difference between the to-be-corrected workpiece and a reference workpiece is calculated according to data obtained through measurement, the machining allowance of the to-be-corrected workpiece is obtained, and the machining allowance comprises a deformation area of the to-be-corrected workpiece and the corresponding deformation amount; according to the machining allowance of the to-be-shaped workpiece, ultrasonic shot blasting guns with different frequencies are adopted for conducting shape correction treatment on the to-be-shaped workpiece; and the steps are repeated until the corrected workpiece meets the correction standard. According to the device, a to-be-machined metal plate and a to-be-shaped hub can be subjected to shape correction treatment, the hub shape correction precision is improved, meanwhile, damage to the hub is avoided, and the application range is wide.