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Ultrafast laser grinding wheel dressing device and method based on Bessel beams

A Bessel beam and grinding wheel dressing technology, which is applied in the field of ultrafast laser grinding wheel dressing devices, can solve the problems of grinding wheel precision and efficiency, achieve high peak power density, concentrate beam energy, and improve dressing efficiency.

Pending Publication Date: 2022-04-08
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a laser dressing method based on Bessel beams, aiming to solve the problem of precision and efficiency in the grinding wheel dressing process

Method used

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  • Ultrafast laser grinding wheel dressing device and method based on Bessel beams
  • Ultrafast laser grinding wheel dressing device and method based on Bessel beams
  • Ultrafast laser grinding wheel dressing device and method based on Bessel beams

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Experimental program
Comparison scheme
Effect test

Embodiment

[0048] Ultrafast femtosecond pulsed laser is used, and the specific parameters are: near-infrared light with a wavelength of 800nm, a pulse width of 35fs, and a pulse frequency of 1kHz.

[0049] Install the bronze bonded diamond grinding wheel on the special fixture, adjust the position of the outer circular surface of the grinding wheel relative to the focal point of the Bessel beam spot, and scan the grinding wheel with the laser beam. Laser process parameters for tangential dressing test of diamond grinding wheel, laser power range 0.5 ~ 5W, shaft speed range 2000 ~ 5000° / min, axial scanning speed range 0.05 ~ 1mm / min, scan times The value range is 1 to 10 times, and the "Zigzag" shape trimming method is adopted. Laser power, scanning speed and number of process parameters have a great influence on the effect of grinding wheel dressing. Therefore, these process parameters are respectively subjected to single-factor tangential dressing experiments to determine the optimal pr...

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Abstract

The invention provides an ultrafast laser grinding wheel dressing device and method based on Bessel beams. The ultrafast laser grinding wheel dressing device comprises a femtosecond or picosecond laser, a lens set and a grinding wheel fixing platform. The lens group comprises a reflecting mirror, a diaphragm, an axicon, a first plano-convex lens and a second plano-convex lens which are arranged in sequence, laser beams output by the femtosecond or picosecond laser are reflected by the reflecting mirror, after the diaphragm controls the shape of light spots, initial Gaussian beams pass through the axicon and are converted into Bessel beams with non-diffraction distance, and the Bessel beams are transmitted to the femtosecond or picosecond laser through the second plano-convex lens. The peak power density of the light is increased through the next plano-convex lens, the focus of the light beam focusing is irradiated on the grinding wheel through the second plano-convex lens, and the grinding wheel is installed on the grinding wheel fixing platform.

Description

technical field [0001] The invention relates to an ultrafast laser grinding wheel dressing device and method based on Bessel beams, and belongs to the technical field of laser dressing grinding wheels. Background technique [0002] In the past few decades, the demand for high-precision parts has increased dramatically, and hard and brittle materials must be processed by grinding processes. Ultra-precision grinding is a processing method that can take into account processing accuracy, surface quality and processing efficiency in ultra-precision machining. The aim is to produce parts with high surface finish, high shape accuracy, and high surface integrity. In order to reduce time and cost, the surface quality obtained by precision grinding process becomes more important. [0003] However, in the process of ultra-precision grinding, some problems will inevitably occur on the grinding wheel: [0004] 1. The surface of the grinding wheel will wear or clog, causing grinding ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B53/12B24B53/06B23K26/36B23K26/064B23K26/70
Inventor 姚鹏周嘉斌褚东凯何婉盈杜绪伟屈硕硕黄传真
Owner SHANDONG UNIV
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