Method for automatically adjusting powder supply of metal 3D printer

Abstract

The invention discloses a formula for automatically adjusting the powder supply height of a metal 3D printer, which includes the following steps: S1 input the size parameters x0 and y0 of the forming cylinder, and the size parameter x0' of the powder supply cylinder; S2 according to the current printing layer Outline, obtain and input the x and y values; S3 obtain the layer thickness h0 of the current printing layer; S4 change the powder supply height in real time according to the formula; S5, when steps S1 to S4 are carried out to 15 times, according to the remaining material in the remaining material collection box Amount, multiplied by the coefficient A before the calculation formula of the current powder supply height. The powder supply height of the current printing layer can be dynamically adjusted in real time according to the factors such as the placement position of the powder, the powder batch, the change of the powder density in the forming cylinder and the powder supply cylinder, and the operator, so as to achieve the premise that the current printing layer is covered. , to minimize the volume of the remainder.

Description

technical field [0001] The invention relates to a method for calculating the powder supply amount of a 3D printer, in particular to a method for automatically adjusting the powder supply amount of a metal 3D printer. Background technique [0002] Selected area laser melting technology, also known as metal 3D printing technology, its working principle is as follows: figure 1 As shown in , first, use the existing slicing and laser scanning path planning software to design the path of the laser beam; then, the powder supply cylinder rises to a certain height, the forming cylinder descends to a height of layer thickness, and the powder spreading scraper will supply the powder The powder on the cylinder that is higher than the forming cylinder is pushed to the surface of the forming cylinder, and spread evenly, and the excess material is pushed to the remaining material collection box at the other end, and then the machine drives the laser beam to process the evenly spread powder...

AI Technical Summary

Problems solved by technology

Although this form of quantitative powder supply can prevent the remaining material from entering the powder supply tank directly, and can also improve the utilization rate of powder to a certain extent, however, according to the above-mentioned 3D printing principle description, it can be known that when parts are stacked and formed layer by layer, each The contours and shapes of one layer are all different, but the powder conveyed by the powder spreading body is quantitative, which will inevitably cause insufficient powder supply on the layer with a larger effective physical area, and some layers with a smaller effective physical area The amount of powder supplied exceeds the actual amount, resulting in a large volume of remaining material

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