Device and method for controlling surface quality of metal droplet printed 3D part

A surface quality and control device technology, applied in the direction of additive processing, etc., can solve problems such as difficult to meet the technical requirements of parts, large surface roughness, etc., to reduce interlayer defects and step effects, improve forming quality, and reduce fish scales topographical effect

Inactive Publication Date: 2017-03-08
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the existing problems that the surface of the existing metal droplet deposition parts has regular "fish scale morphology", unevenness, large surface roughness, and it is difficult to meet the technical requirements for the use of parts, the present invention proposes a rapid surface melting method using laser A method for controlling the forming surface of parts by directional scraping and pressing composite treatment of covering and flattening rollers, and providing a device for realizing forming surface control by using this method

Method used

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  • Device and method for controlling surface quality of metal droplet printed 3D part
  • Device and method for controlling surface quality of metal droplet printed 3D part
  • Device and method for controlling surface quality of metal droplet printed 3D part

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1. Test of Tin Alloy Droplet Printing and Forming Parts

[0022] (1) According to the material properties of the tin alloy droplet, the diameter of the selected deposited droplet is: 200 microns, the thickness of the deposited layer is 150 microns, the selected laser power is 1.5KW, the spot size is 250 microns, and the scanning speed is 5m / s;

[0023] (2) According to the layered data information of the parts, the computer sets the appropriate temperature of the deposition substrate as: 150°C, the injection frequency of metal droplets is 5Hz, the speed of the moving platform is 1mm / s, and deposits a single layer point by point according to the scanning deposition path. level;

[0024] (3) Move the deposited single layer to the laser cladding area, turn on the laser and set the laser power to 1.5KW and the spot size to 250 microns, and set the appropriate roller cladding depth to 50 microns through the roller height adjuster and a pressure of 0.2MP;

[0...

Embodiment 2

[0030] Example 2. Aluminum Alloy Droplet Printing Forming Part Test

[0031](1) According to the material characteristics of the aluminum alloy droplet, the diameter of the selected deposited droplet is: 300 microns, the thickness of the deposited layer is 250 microns, the selected laser power is 3KW, the spot size is 350 microns, and the scanning speed is 5m / s;

[0032] (2) According to the layered data information of the parts, the computer sets the appropriate deposition substrate temperature as: 550°C, the injection frequency of metal droplets is 10Hz, and the speed of the moving platform is 3mm / s, and deposits a single point by point according to the scanning deposition path. level;

[0033] (3) Move the deposited single layer to the laser cladding area, turn on the laser and set the laser power to 3KW and the spot size to 350 microns, and set the appropriate roller cladding depth to 50 microns and The pressure is 0.5MP;

[0034] (4) Control the vibrating mirror ...

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Abstract

The invention discloses a device and a method for controlling surface quality of a metal droplet printed 3D part. The device comprises a computer system, a metal droplet injection head, a laser, a scanning galvanometer, a galvanometer motor, a moving platform, a deposition substrate, a driving motor, a leveling roller, a roller motor and a charge coupled device (CCD) camera and is characterized by further comprising a laser power regulator, a leveling roller height regulator, a substrate temperature control device, an edge scraper and the like. The laser is used as an energy source, rapid surface cladding of a formed layer by a laser beam is realized through the scanning galvanometer, the leveling depth and pressure of the roller are controlled through the leveling roller height regulator, in the state that the surface layer metal droplets or melt is not solidified at all, directional scraping pressing is performed on the rapidly cladded metal surface by controlling the speed of the moving platform and the speed of the leveling roller, secondary spreading and filling are realized, then the original uneven formed layer is subjected to roller flattening, the surface quality of the layer is controlled, and real-time detection and feeding back of the roller flattening effect are realized.

Description

technical field [0001] The invention relates to the technical field of metal 3D printing additive manufacturing, in particular to a surface quality control device and a control method for metal droplet printing 3D parts. Background technique [0002] Metal droplet printing deposition forming technology is a method of directly manufacturing metal parts that combines layered manufacturing technology and droplet on-demand injection technology, and takes "part model discrete-material layer by layer" as the forming idea. This forming technology does not require special molds and expensive equipment, and can directly form complex three-dimensional metal structures. It has the advantages of low cost, high forming efficiency, wide range of material sources, flexibility, low energy consumption and no pollution. It has a good application prospect in the fields of micro-weapon system and equipment. However, the process of metal droplet printing and deposition forming parts is a dynami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115B33Y30/00B33Y50/02
Inventor 晁艳普白政民李耀辉丁瑞华卢帅
Owner XUCHANG UNIV
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