Ultrasonic vibration assisted machining of axial-bending-torsional coupled vibration horn

Abstract

The invention discloses an ultrasonic vibration assisted machining axial direction-bending-torsion coupled vibration amplitude-change pole which sequentially comprises a coordinated positioning section, a first actuator installing section, a second connector installing section, a second actuator installing section, a third connector installing section and a cutter gear installing section arrangedaccording to the sequence. The coordinated positioning section and the cutter gear installing section are located at two ends of the vibration amplitude-change pole, the coordinated positioning section is used for coordinated positioning with a machine tool cutter worktable, and the cutter gear installing section is used for installing a cutter gear. The ultrasonic vibration assisted machining axial direction-bending-torsion coupled vibration amplitude-change pole can achieve coupled vibration of axial direction, bending and torsion, improves the material cutting efficiency, prolongs the service life of a cutter, improves the surface quality of workpieces, can synchronously achieve coarse and finish machining of a gear, produces an ultrasonic cavitation effect through ultrasonic vibration,enables a cutting fluid to more deeply penetrate into its contact parts, further reduces the temperature of the area, in contact with the cutter, of a workpiece, improves the surface quality of the workpiece and prolongs the service life of the cutter.

Description

technical field [0001] The invention relates to the field of gear processing, in particular to an ultrasonic vibration-assisted machining of an axial-bending-torsional coupled vibration horn. Background technique [0002] At present, in cylindrical gears, due to the different tooth shapes, cylindrical gears are divided into spur gears, helical gears, bolt gears and hyperbolic gears. The tooth shapes are straight line, oblique line, spiral curve, hyperbolic, The relative motion of tool and workpiece is one-dimensional and two-dimensional. Gear shaping is an effective method for processing gears, such as image 3 As shown, during the gear shaping process, the tool gear A feeds up and down to process the workpiece gear B. The gear after the gear shaping process usually requires finishing processes such as grinding, lapping, or honing to improve its surface quality and meet complex working conditions. usage requirements. For this reason, the existing technology often uses ultr...

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Problems solved by technology

For this reason, the existing technology often uses ultrasonic vibration to assist gear processing, so that the cutting force in the processing process is smaller, the tool wear is lower, the surface quality of the workpiece is better, and the cutting efficiency is higher. The existing research on gear shaping processing It is mainly focused on one-dimensional ultrasonic longitudinal vibration assisted gear shaping machining, but due to the height of the gear shaping cutter, it is difficult to achieve a complete non-contact cycle between the tool and the workpiece within one ultrasonic cycle

In the two-dimensional ultrasonic vibration-assisted vibration machining in the axial and horizontal directions, the original motion should be as follows: Figure 4 As shown, but due to factors such as the amplitude of ultrasonic vibration, bending deformation caused by ultrasonic vibration, and bending deformation caused by cutting force in gear shaping processing, it will be as follows Figure 5 The geometric interference shown

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