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3D printing quality computer online monitoring method

A 3D printing and computer technology, applied in the field of 3D printing, can solve the problems of uneven powder mixing and discharge, increased misjudgment ratio, error, etc., and achieve the effect of uniform temperature field, less sintering defects, and improved quality

Active Publication Date: 2020-06-12
山东水利职业学院
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Problems solved by technology

Since different element powders need to be mixed online when multi-element powders are fed in different cylinders synchronously, there is a high probability that there will be uneven powder mixing or discharge errors due to the instability of the carrier gas and the structural defects of the powder nozzles, resulting in relatively stable The thermal fluctuation of the molten pool under laser energy is more obvious than that of the general powder supply method. Using the existing technology to adjust the printing parameters in real time based on the online detection of the molten pool will cause problems such as increased misjudgment rate or overshooting.

Method used

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  • 3D printing quality computer online monitoring method

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Embodiment 1

[0033] A computer online monitoring method for 3D printing quality, such as figure 1 In the shown process of laser 3D printing using multi-element powder synchronous feeding in different cylinders, the CCD camera 6 is used to collect the temperature data of the laser melting pool 4 in real time and upload it to the computer 8, which is compared with the standard temperature data pre-stored by the computer 8 and adjusted in real time Working parameters, multi-element powder synchronous powder feeding laser 3D printing is used to construct gradient functional materials, because the composition of metal elements changes, and the laser processing energy is mainly used to heat the metal powder to melt or sinter the metal powder, so When the gradient of the metal element composition changes greatly, the laser processing energy generally also changes according to the metal element composition of the current gradient layer. Therefore, the working parameters here mainly refer to the las...

Embodiment 2

[0045] To collect standard temperature data in the simulated state, the most important thing is to ensure that the simulated state is highly consistent with the actual printing parameter conditions, printing atmosphere conditions, and component heat-affected conditions in the multi-element powder synchronous powder feeding laser 3D printing. The main control printing parameters can be precisely controlled. When the printing atmosphere changes greatly, it can also be automatically adjusted by external interference. However, the formation of the heat-affected conditions of the components is passive. On the one hand, the use of high-energy laser beam forming Parts, the real-time temperature of the whole part, especially the temperature of the just completed part, is an important influencing factor. In addition to the laser energy directly irradiated to the molten pool, the temperature of the key parts of the part has the greatest influence on the cladding quality, especially for sm...

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Abstract

The invention discloses a 3D printing quality computer online monitoring method. In the multi-element powder different-barrel synchronous powder feeding laser 3D printing process, a CCD camera is adopted to collect temperature data of a laser molten pool in real time and update the temperature data to a computer, the collected temperature data are compared with standard temperature data prestoredin the computer, a working parameter is adjusted in real time, and the working parameter is at least one of the laser power, the scanning speed or the powder feeding speed; and the standard temperature data prestored in the computer are built according to a synchronous powder feeding laser 3D printing simulation experiment for premixed or pre-alloyed powder of which the element proportion is the same with that of multi-element powder conveyed by different barrels. According to the 3D printing quality computer online monitoring method, the relative ideal and stable simulation condition is adopted, thus, the standard data can meet the actual cladding requirements better, misjudgments and the overshoot proportion when real-time regulate and control are conducted on printing parameters are greatly reduced, sintering defects of cladding are decreased, and the quality of workpieces is improved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a computer online monitoring method for 3D printing quality. Background technique [0002] In recent years, 3D printing technology has begun to play an important role in the manufacture of special functional materials. For example, domestic and foreign enterprises, universities and research institutions are increasingly using 3D printing technology to prepare multi-metal or alloy functionally graded materials used in the electronics industry. And it has obtained mechanical, thermal, magnetic and other properties that cannot be achieved by traditional technology. At the same time, the incomparable advantages of 3D printing technology in terms of development cycle and manufacturing efficiency have also greatly promoted the progress of industry and technology. [0003] Based on the characteristics of 3D printing to generate parts layer by layer, online monitoring and control of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y50/02
CPCB33Y50/02B22F10/00B22F10/36B22F10/38B22F10/368B22F10/85B22F10/25B22F12/90B22F10/32Y02P10/25
Inventor 宋雅静王书平
Owner 山东水利职业学院
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