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Laser machining method and system of surface composite micro-structure of nodular cast iron material

A nodular cast iron and surface composite technology, which is applied in laser welding equipment, metal processing equipment, cleaning methods and appliances, etc., can solve the problems of the development limitation of composite micro-textured surface technology, the inability to prepare multiple sizes, and low processing efficiency. , to achieve the effect of eliminating original scratches and microcracks, low cost, and eliminating microcracks

Inactive Publication Date: 2020-08-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, laser processing technology cannot produce composite micro-textured arrays of various sizes in one go and continuously.
For composite micro-textured surfaces, the current method of laser processing is multiple processing, each processing a micro-textured array of a certain size, the processing efficiency is low, and the process is more complicated.
The development of laser preparation of composite micro-textured surface technology is limited

Method used

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  • Laser machining method and system of surface composite micro-structure of nodular cast iron material
  • Laser machining method and system of surface composite micro-structure of nodular cast iron material
  • Laser machining method and system of surface composite micro-structure of nodular cast iron material

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Experimental program
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Effect test

Embodiment 1

[0016] refer to figure 1 : Laser processing system for composite micro-texture on the surface of ductile iron materials, which is a processing system with focusing lens, including laser [1], photoelectric shutter [2], beam expander [3], mirror [4], computer control system [5], focusing lens [6], CCD [7], workpiece [8], stage [9] and fixture [10]. The computer control system [5] is connected to the laser [1], photoelectric shutter [2], CCD [7] and displacement stage [9] through lines respectively.

[0017] The method for processing the composite microtexture on the surface of a ductile iron material by laser comprises the following steps.

[0018] (1) Prepare the workpiece [8], the workpiece material is QT900-5, firstly polish the surface with sandpaper to make the surface burr-free and smooth. Ultrasonic cleaning with acetone, ethanol, and water for 1-3 minutes each to make the surface free of oil, particles, and other pollution.

[0019] (2) Fix the fixture [10] on the di...

Embodiment 2

[0023] refer to figure 2 : Laser processing system for composite micro-texture on the surface of ductile iron materials, which is a processing system with focusing lens, including laser [1], photoelectric shutter [2], beam expander [3], mirror [4], computer control system [5], CCD[7], workpiece[8], displacement stage[9], scanning galvanometer[11] and f-θ mirror[12]. The computer control system [5] is connected to the laser [1], photoelectric shutter [2], CCD [7], displacement stage [9] and scanning galvanometer [11] respectively through lines.

[0024] The method for processing the composite microtexture on the surface of a ductile iron material by laser comprises the following steps.

[0025] (1) Prepare the workpiece [8]. The material of the workpiece [8] is QT900-5. First, polish the surface with sandpaper to make the surface burr-free and smooth. Ultrasonic cleaning with acetone, ethanol, and water for 1-3 minutes each to make the surface free of oil, particles, and oth...

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Abstract

The invention provides a laser machining method and system of a surface composite micro-structure of a nodular cast iron material and belongs to the technical field of laser machining. The laser machining method and system utilize the feature that spherulitic graphite is randomly and evenly distributed in cast iron, and obtain micro-pit arrays in distribution of multiple diameters and depths through ablation of the spherulitic graphite; by adjusting the laser parameters, the micro-pit distribution of the ideal dimension proportion is obtained; and meanwhile, by means of the feature of a laserremelting technology, a surface of a lower roughness is obtained on the peripheral region of the micro-pits, and micro-cracks, scratches and other defects on the original material surface are eliminated. The laser machining method can achieve continuous one-time machining of the composite micro-structure surface, and eliminates the original scratches, micro-cracks and other defects of the materialduring machining at the same time. The prepared composite micro-structure surface has a low friction coefficient and high anti-wear performance. The laser machining method and system of the surface composite micro-structure of the nodular cast iron material has the features of being high in efficiency and low in cost and can achieve assembly line production.

Description

technical field [0001] The invention relates to a method and a processing system for laser processing the compound microtexture on the surface of ductile iron materials, belonging to the technical field of laser processing. Background technique [0002] The use of laser processing technology to prepare micro-textures is one of the methods to improve friction and wear performance. Micro-texture arrays such as micro-pits, micro-grooves, and micro-protrusions can be prepared on the surface of materials by laser processing. The prepared micro-textured array can reduce the friction coefficient and improve the anti-wear performance under dry friction, starved oil lubrication and fluid lubrication conditions. At present, a large number of studies have reported the use of laser processing technology to prepare single-size micro-textured surfaces. The reported surface texture types include regular hexagonal micro-convexes, square convex bodies, circular pits, square pits, and paralle...

Claims

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Application Information

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IPC IPC(8): B23K26/0622B23K26/064B23K26/082B23K26/60B23K26/70C22C37/04B08B3/12
CPCB08B3/12B23K26/0643B23K26/0648B23K26/0622B23K26/082B23K26/60B23K26/702C22C37/04
Inventor 王志文郑宏宇袁伟丛建臣郭前建张立国张磊安
Owner SHANDONG UNIV OF TECH
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