An ultrasonic laser and mechanical composite processing method. While ultrasonic vibrations are being produced in a workpiece to be processed, laser light generated by a laser performs coarse processing on the workpiece to be processed, and the laser light processing causes a damage layer having cracks to be produced on the workpiece to be processed. Ultrasonic vibrations are used to increase the expansion of the damage layer, and then fine processing is performed on the workpiece to be processed by means of a cutter. The ultrasonic vibration helps molten droplets to fall off after the laser light ablates the workpiece to be processed, increasing contact between the laser light and the workpiece to be processed. The action of the laser light ablation causes a damage layer having microcracks to be produced on the workpiece to be processed, and under the action of the ultrasonic vibrations, after the microcracks are formed, release of stresses inside the material are caused to be released more completely because of the high-frequency vibration, and the expansion of the microcracks is stably increased, thus stably increasing the expansion of the damage layer, aiding the removal of material when the cutter performs fine processing on the workpiece to be processed, and reducing cutting force and wear on the cutter, thus improving processing efficiency. The invention further relates to an ultrasonic vibration fixture, a machine tool, and a laser.
B23P 25/00 - Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
B23K 26/346 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding
Provided are a ultrasonic laser mechanical composite processing method, a ultrasonic vibration fixture (20), a machine tool and a laser. When ultrasonic vibration is generated on the workpiece (10) to be processed, the laser light generated by the laser performs rough machining on the workpiece (10) to be processed. Laser processing produces a damaged layer (11, 11') with cracks on the workpiece (10) to be processed. Ultrasonic vibration is used to increase the expansion of the damaged layer (11, 11'), and then a cutting tool is used for finishing the workpiece (10) to be processed.
B23K 26/346 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding
B23K 26/02 - Positioning or observing the workpiece, e.g. with respect to the point of impactAligning, aiming or focusing the laser beam
3.
TRANSDUCER AND ASSEMBLING METHOD THEREFOR, AND ULTRASONIC WELDING DEVICE
A transducer (10) and an assembling method therefor, and an ultrasonic welding device. The transducer (10) comprises: a front cover plate (1); a screw rod (2), a front end of the screw rod (2) being connected to the front cover plate (1); a piezoelectric vibrator (3) provided outside the screw rod (2) in a sleeving manner and located at a rear end of the front cover plate (1); and a rear cover plate (4) provided outside the screw rod (2) in a sleeving manner and located at a rear end of the piezoelectric vibrator (3); wherein the piezoelectric vibrator (3) is tightly pressed between the front cover plate (1) and the rear cover plate (4). A Teflon insulating sleeve (5) is provided at a position, opposite to the piezoelectric vibrator (3), of the outer periphery of the screw rod (2), so that the screw rod (2) is insulated from the piezoelectric vibrator (3).
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
B29C 65/08 - Joining of preformed partsApparatus therefor by heating, with or without pressure using ultrasonic vibrations
B23K 20/10 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
4.
MICRO/NANO TEXTURED SUPERHARD TOOL BIT AND LASER-ASSISTED GRINDING COMPOSITE MACHINING METHOD THEREFOR
A micro/nano textured superhard tool bit (10) and a laser-assisted grinding composite machining method therefor. The superhard tool bit comprises a front surface (12), rear surfaces (13) and a tip (11). The front surface is provided with a micro textured structure comprising a plurality of first micro grooves (14) parallel to each other. The depth H of the first micro grooves is 50-800 μm, and the distance D between two adjacent parallel first micro grooves is 50-800 μm, thus increasing a heat-dissipation area and implementing a better grinding effect. The composite machining method comprises: S1. cutting, using a laser (30), a front surface of a tool bit to be machined to form a first prefabricated shallow groove; S2. performing, using a sharp end of a grinding wheel (20), grinding machining on the first prefabricated shallow groove to rapidly form a first micro groove; and S3. repeating steps S1 and S2 to form, on the front surface, a plurality of first micro grooves parallel to each other. The machining efficiency and precision are improved.
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