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A surface quality control device for metal droplet printing 3D parts and its control method

A surface quality and droplet 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 improve production efficiency effect

Active Publication Date: 2021-09-24
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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  • A surface quality control device for metal droplet printing 3D parts and its control method
  • A surface quality control device for metal droplet printing 3D parts and its control method
  • A surface quality control device for metal droplet printing 3D parts and its control method

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1. Tin alloy droplet printing forming part test

[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;

[0025] (4) C...

Embodiment 2

[0030] Example 2. Aluminum alloy droplet printing forming part test

[0031] (1) According to the material properties of aluminum alloy droplets, the diameter of the selected deposited droplets 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 motor, roller...

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Abstract

The invention discloses a metal droplet printing 3D part surface quality control device and a control method thereof, comprising: a computer control system, a power adjustable laser, a polarizer, a polarizing motor, a deposition platform, a servo motor, a flattening roller, and a roller motor , CCD camera, and its features also include laser power regulator, leveling roller height regulator, substrate temperature control device and flow edge scraper, etc. The present invention uses a laser as an energy source, realizes rapid surface cladding of the laser beam on the forming layer through a polarizer, and controls the roller's leveling depth and pressure through a leveling roller height adjuster, so that there is no solidification of the metal droplet or melt on the surface layer In this state, by controlling the speed of the moving platform and the flattening roller, directional scraping is performed on the rapidly cladding metal surface to cause secondary spreading and filling, and then the original uneven forming layer is rolled out to complete the layer The control of surface quality, and through the CCD image detection system, realize the real-time detection and feedback of the roller flattening effect.

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 Patents(China)
IPC IPC(8): B22F3/115B33Y10/00B33Y30/00
Inventor 晁艳普白政民李耀辉丁瑞华卢帅
Owner XUCHANG UNIV
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