The invention provides a device and method for eliminating, reducing and homogenizing the residual stress in the milling, boring, drilling, planning and other machining processes in which machined components are fixed and kept unmoved. According to the device and method, a plurality of high-energy sound wave exciters on a working table are tightly coupled with the components coated with coupling media, high-energy sound waves are emitted into the components, and the residual stress inside the machined components is eliminated, reduced and homogenized by utilizing the elastic wave energy whichis generated in the components by the high-energy sound waves. Thus, the purpose that the residual stress is eliminated and homogenized and meanwhile machining is carried out is achieved, the stress-elimination-free machining control is achieved, and it is ensured that the deformation amount in the machining process of the mechanical components and the deformation amount after the machining are the minimum.

Tool and method for eliminating, reducing and homogenizing residual stress of components in machine tool machining

The invention discloses an ultrasonic vibration device capable of improving the longitudinal torsion conversion efficiency. The upper end and the lower end of a pull rod are both provided with fine threads; piezoelectric ceramic, a copper sheet and an insulating sleeve are fixed on a longitudinal-torsion ultrasonic amplitude-variable rod through pressing caps in a threaded and fastening mode; theinner conical surface of the bottom of the longitudinal-torsion ultrasonic amplitude-variable rod is connected with a cutter through a clamp spring and a nut; and a through hole is formed in the longitudinal-torsion ultrasonic amplitude-variable rod, and a plurality of inclined grooves are formed in the outer wall and the inner wall of the longitudinal-torsion ultrasonic amplitude-variable rod, sothat the longitudinal vibration components on the two sides of the inner wall and the outer wall of the longitudinal-torsion ultrasonic amplitude-variable rod are converted into torsional vibration components, and the energy loss caused by friction loss of the torsional vibration inside material is reduced. According to the ultrasonic vibration device, the grooves are formed in the outer wall andthe inner wall of the longitudinal-torsion ultrasonic amplitude-variable rod, so that not only the stable and controllable longitudinal vibration is ensured, but also the conversion efficiency and the transmission efficiency of the torsional vibration components are greatly improved.

Ultrasonic vibration device capable of improving longitudinal torsion conversion efficiency

The invention relates to the field of crude oil pipeline conveying, and particularly relates to a pipeline conveying device for power ultrasonic crude oil viscosity reduction The pipeline conveying device includes a base, a spiral propulsion mixing device, a spiral pipeline, an ultrasonic power supply, a supporting shell and six ultrasonic heating and stirring devices, the spiral propulsion mixing device and the supporting shell are fixedly connected to the base, the left end of the screw propulsion mixing device is fixedly connected with the spiral pipeline, the ultrasonic power supply and the spiral pipeline are fixedly connected to the supporting shell, and the six ultrasonic heating and stirring devices are fixedly connected to the spiral pipeline and the supporting shell correspondingly The pipeline conveying device for power ultrasonic crude oil viscosity reduction has the beneficial effects of small space occupation, high heating efficiency, high fusion speed of crude oil andcoagulating liquid and obvious viscosity reduction effect

Pipeline conveying device for power ultrasonic crude oil viscosity reduction

The invention provides a knife back structure and an ultrasound knife including the knife back structure. The length of the knife back structure is 251.5 mm. The knife back structure comprises a tailpart, a coupling area I, a coarse-fine alternate area and a coupling area II, wherein the tail part, the coupling area I, the coarse-fine alternate area and the coupling area II are sequentially connected. The coarse-fine alternate area is formed by alternately arranging cylinders with different diameters. The tail part is a cylinder body. The coupling area I is a cylinder body. The coupling areaII is a cylinder body. The coarse-fine alternate area is provided with four fine structures and four coarse structures. All the coarse structures have the same diameter. All the fine structures have the same diameter, and the diameter difference between the coarse structures and the fine structures is less than 0.3mm. The coupling area I is connected with the fine structures in the coarse-fine alternate area, and the coupling area II is connected with the coarse structures in the coarse-fine alternate area. The ultrasound knife can work safely in a fixed frequency range without causing difficulty in operation or unsafe use due to frequency drift; and when an ultrasound wave passes through the coarse-fine alternate structure, the amplitude of an ultrasound knife head can be enhanced, and the electrical energy conversion efficiency can be improved.

Knife back structure and ultrasound knife including knife back structure

The invention discloses a gear longitudinal-torsional ultrasonic rolling device, which comprises a main worktable, a driving shaft and an ultrasonic vibrating mechanism. The driving shaft is transversely mounted on the main worktable, one end of the driving shaft is connected with a motor, and the other end of the driving shaft is used for clamping a workpiece gear; and the ultrasonic vibrating mechanism comprises a vibrating amplitude-change pole and an ultrasonic vibration generating device, and the ultrasonic vibration generating device is used for generating ultrasonic vibration, being effected by the vibrating amplitude-change pole and then transmitting longitudinal-torsional vibration to a tool gear. Through the gear longitudinal-torsional ultrasonic rolling device, ultrasonic vibration is generated by the ultrasonic vibration generating device and subjected to amplification conversion of the vibrating amplitude-change pole, then longitudinal-torsional ultrasonic vibration is transmitted to the tool gear, the tool gear conducts ultrasonic rolling reinforcement on the workpiece gear, the mechanical properties of the gear surface of the machined gear can be improved, the efficiency is high, and the reinforcing range is wide.

Gear longitudinal-torsional ultrasonic rolling device

The invention provides a longitudinal-torsion ultrasonic-vibration processing device, which comprises an ultrasonic vibrator and an amplitude-change pole converting longitudinal ultrasonic vibration provided by the ultrasonic vibrator into longitudinal-torsion compound vibration. The amplitude-change pole is connected with one end of the ultrasonic vibrator, and comprises a first-stage amplitude-change pole and a second-stage amplitude-change pole; the first-stage amplitude-change pole is hollowly cylindrical; the second-stage amplitude-change pole is fixed at one end of the first-stage amplitude-change pole, and is used for fixing processing tools; the inner diameter of the first-stage amplitude-change pole is greater than one half of the outer diameter of the first-stage amplitude-changepole; and a plurality of spiral grooves penetrating a cylinder wall are formed on the cylinder wall of the first-stage amplitude-change pole. The longitudinal-torsion ultrasonic-vibration processingdevice is high in energy conversion and transmission efficiency.

Longitudinal-torsion ultrasonic-vibration processing device

The invention relates to the technical field of machining, and discloses an ultrasonic vibration workbench and machining technology. The ultrasonic vibration workbench comprises a base, an ultrasonictransducer, a composite booster and a clamp; the base is provided with a cavity, and the ultrasonic transducer is encapsulated inside the cavity; an input end of the composite booster is detachably connected with the ultrasonic transducer, and an output end of the composite booster is connected with the clamp; and the clamp is used for clamping a workpiece to be machined. According to the ultrasonic vibration workbench, the workpiece performs the ultrasonic vibration so as to be free of limitation from high-speed rotation of a tool, the machining process is more stable and the ultrasonic vibration workbench can be applied to a high-speed cutting environment; the cutting force and the cutting temperature can be effectively reduced, the damage of the tool and the ultrasonic transducer can bereduced, and the machining quality can be improved; and the ultrasonic vibration workbench is simple in structure, convenient to detach, and ready to mount and use.

Ultrasonic vibration workbench and machining technology

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Longitudinal-torsion ultrasonic-vibration processing device

Ultrasonic vibration workbench and machining technology