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Nanosecond, picosecond and femtosecond beam combination laser parallel finishing and polishing machining method

A processing method, femtosecond technology, applied in the field of additive manufacturing, can solve problems such as low efficiency, high cost, and poor quality

Inactive Publication Date: 2021-08-03
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Purpose of the invention: The present invention provides a parallel finishing and polishing processing method of nanopicosecond beam combining laser, and its purpose is to solve the problems of low efficiency, poor quality and high cost in previous processing methods

Method used

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  • Nanosecond, picosecond and femtosecond beam combination laser parallel finishing and polishing machining method

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Embodiment 1

[0040] 1. Install the metal additive manufacturing parts 14 of TC4 alloy on the two-axis belt clamping workbench 15, and put the whole device in an argon inert gas sealed cabin, the oxygen and water content in the sealed cabin is ≤50ppm, the purpose It is to prevent the metal from being oxidized and polluted by the air; the digital model of the metal additive manufacturing part 14 of the TC4 alloy is established by reverse engineering modeling software, and compared with the shape and size of the three-dimensional model of the actual metal additive manufacturing part 14, through The model processing software determines the machining allowance of the metal additive manufacturing parts 14 of the TC4 alloy, and the machining allowance is determined to be about 800 μm;

[0041] 2. Through the CAM path planning software 20, the machining allowance path of the metal additive manufacturing parts 14 of the TC4 alloy is transmitted to the three-dimensional scanning galvanometer 13 and t...

Embodiment 2

[0047] The TC4 alloy in embodiment 1 is replaced by nickel-based superalloy, and the method is the same as in embodiment 1. The scanning speed of the three-dimensional scanning galvanometer 13 is 120m / min; the high energy density of the nanopicosecond combined laser beam 7 is used to combine the principle of evaporation and melting of the metal, and the focus of the nanopicosecond combined laser beam 7 Irradiate the metal additive manufacturing parts of nickel-based superalloy 14 to the commanding heights of the surface of the machining allowance, so that the metal at the commanding heights of the surface evaporates and melts. After the first layer is completed, the second layer is cycled, and so on for the twelfth cycle. Layer, realized the metal additive manufacturing parts of nickel-based superalloys, the subsequent processing thickness (depth) ≈ 50 μm, and the processing allowance was determined to be about 600 μm; the processing efficiency ≈ 10cm 2 / min, surface roughnes...

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Abstract

The invention relates to a nanosecond, picosecond and femtosecond beam combination laser parallel finishing and polishing machining method. The method comprises the steps of establishing a digital model of a metal additive manufacturing part through reverse engineering modeling software, and determining the machining allowance of the metal additive manufacturing part through model processing software; enabling a machining allowance path of the metal additive manufacturing part to pass through a computer control system through CAM path planning software; starting a nanosecond laser, a picosecond laser and a femtosecond laser through the computer control system to emit light at the same time, integrating three beams to form a nanosecond, picosecond and femtosecond beam combination laser beam, and transmitting the nanosecond, picosecond and femtosecond beam combination laser beam to a three-dimensional scanning galvanometer; and irradiating the nanosecond, picosecond and femtosecond beam combination laser beam to the surface of the metal additive manufacturing part along a planned machining path of the CAM path planning software through the computer control system. According to the method, the problems that an existing machining method is low in efficiency, poor in quality and high in cost are solved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a subsequent nanopicosecond combined beam laser parallel finishing and polishing processing method for metal additive manufacturing parts. Background technique [0002] With the rapid development of additive manufacturing technology, traditional manufacturing methods (such as casting, forging, and machining) of parts in aerospace and other fields are gradually replaced by near-net shape additive manufacturing methods. Compared with traditional manufacturing methods, the manufacturing cycle of additive manufacturing structural parts is shortened, the quality is improved, the manufacture of complex parts is easy to achieve, and the weight is significantly reduced. It is very popular in aerospace and other manufacturing fields. However, bottleneck problems such as low post-processing efficiency and high cost of metal additive manufacturing parts seriously ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/12B23K26/082B23K26/073B23K26/354B23K26/02
CPCB23K26/123B23K26/082B23K26/073B23K26/354B23K26/02
Inventor 徐国建徐诺王文博刘占起张国瑜井志成尚纯杭争翔郭志强郑文涛郑黎
Owner SHENYANG POLYTECHNIC UNIV
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