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A droplet deposition rate detection method applied to arc three-dimensional rapid prototyping manufacturing

A detection method and deposition rate technology, applied in the direction of manufacturing tools, arc welding equipment, welding equipment, etc., can solve the problems of low microstructure density of formed parts, complex forming process, complex equipment, etc., to achieve offline detection and online The effect of monitoring, strong operability, and small amount of data calculation

Active Publication Date: 2019-01-29
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using high-energy beam heat sources such as lasers for rapid prototyping of metal materials, the equipment is complex, expensive, and the forming process is complicated, and the microstructure of the formed parts is not high.

Method used

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  • A droplet deposition rate detection method applied to arc three-dimensional rapid prototyping manufacturing
  • A droplet deposition rate detection method applied to arc three-dimensional rapid prototyping manufacturing
  • A droplet deposition rate detection method applied to arc three-dimensional rapid prototyping manufacturing

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The substrate used is a 6061 aluminum alloy plate with a thickness of 4mm, and the metal wire is an AlSi aluminum alloy welding wire with a diameter of 1.2mm. Weigh the mass of the substrate to get its mass m 0 = 58.44g. Install the base plate and securely fix it horizontally, clamp the arc welding torch to the traveling mechanism of the 3D CNC work platform, and adjust the direction of the arc welding torch so that it is perpendicular to the plane of the base plate. The aluminum alloy welding wire used is connected to the positive pole of the power supply, and the substrate is connected to the negative pole of the power supply. Install the arc power sensor at the positive and negative ends of the arc, install the acoustic emission sensor on the substrate, and face the center of the manufacturing area. Set the arc current output as 164A, and the arc voltage output as 22.8V. The protective gas used is 99.999% high-purity argon, and the flow rate of the protective gas ...

Embodiment 2

[0056] The substrate used is a 6061 aluminum alloy plate with a thickness of 4mm, and the metal wire is an AlSi aluminum alloy welding wire with a diameter of 1.2mm. Set the arc current output to 120A, the arc voltage output to 18.2V, the pulse frequency to 100Hz, and the base current to 20A. The protective gas used is 99.999% high-purity argon, and the flow rate of the protective gas is 20L / min. The aluminum alloy welding wire used is connected to the positive pole of the power supply, and the substrate is connected to the negative pole of the power supply. Install the base plate and fix it reliably horizontally, and adjust the direction of the arc welding torch to make it perpendicular to the plane of the base plate. Install the arc power sensor at the positive and negative ends of the arc. Set the moving speed of the worktable along the x direction to 10mm / s, the travel time to 4.5s, and the stroke to 45.0mm, so that the arc travels at a constant speed during the combusti...

Embodiment 3

[0060] The substrate used is a 6061 aluminum alloy plate with a thickness of 4mm, and the metal wire is an AlSi aluminum alloy welding wire with a diameter of 1.2mm. Set the arc current output to 130A, the arc voltage output to 18.6V, the pulse frequency to 100Hz, and the base current to 20A. The protective gas used is 99.999% high-purity argon, and the flow rate of the protective gas is 20L / min. The aluminum alloy welding wire used is connected to the positive pole of the power supply, and the substrate is connected to the negative pole of the power supply. Install the base plate and fix it reliably horizontally, and adjust the direction of the arc welding torch to make it perpendicular to the plane of the base plate. Install the arc power sensor at the positive and negative ends of the arc. Set the moving speed of the worktable along the x direction to 10mm / s, the travel time to 6.0s, and the stroke to 60.0mm, so that the arc travels at a constant speed during the combusti...

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Abstract

The invention discloses a molten drop deposition rate detecting method applied to electric arc three-dimensional rapid prototyping and manufacturing. The method comprises the steps that electric arc power signals in an electric arc circuit of the complete machining process are acquired in real time, and signal waveforms indicating variation of the electric arc power as time goes are obtained; an electric arc power signal amplitude threshold value is set, electric arc power time-domain signal waveforms with the amplitude higher than the threshold value are extracted, and electric arc power time-domain feature waveforms are obtained; noise is eliminated through a wavelet analysis method; low-frequency components in the electric arc power time-domain feature waveforms are extracted by means of a wavelet packet analysis method, and an electric arc power signal low-frequency component feature waveform drawing is drawn; and molten drop deposition rate variation time-domain waveforms in the machining process are obtained after calculation is conducted through application into an electric arc power-molten drop deposition rate mathematical model, and finally a molten drop deposition rate value at any time in the machining process is obtained. By means of the molten drop deposition rate detecting method, off-line detection and online detection of the molten drop deposition rate in the electric arc three-dimensional rapid prototyping and manufacturing process of the metal materials of TIG, MIG, MAG, PAW and the like.

Description

technical field [0001] The invention relates to a method for detecting droplet deposition rate applied to three-dimensional arc rapid prototyping manufacturing, which is applicable to the detection of droplet deposition rate in the arc three-dimensional rapid prototyping manufacturing process of TIG, MIG, MAG, PAW and other metal materials, and is also suitable for metal materials Detection of droplet deposition rate in arc surfacing, arc cladding and other arc additive manufacturing processes. Background technique [0002] Direct manufacturing of metal parts and components is the ultimate goal of the manufacturing industry for three-dimensional rapid prototyping of metal materials. As early as the early stage of the development of 3D rapid prototyping manufacturing technology in the 1990s, researchers have tried to realize the preparation of metal parts based on various rapid prototyping methods. Compared with rapid prototyping technologies such as stereolithography (SLA),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/095
CPCB23K9/0953
Inventor 罗怡韩静韬朱亮熊伟余艇王子琪李正
Owner CHONGQING UNIV OF TECH
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