Additive substrate plane distortion compensating method

Abstract

The invention discloses an additive substrate plane distortion compensating method. A distance measuring head is used, and plane distortion data on the surface of an additive substrate are scanned andmeasured; parameters such as a plane distortion compensation value are calculated by a three-dimensional printing controller, and a forming action head is controlled to follow additive substrate surface distortion and implement deposition operation; in the process of printing a plane distortion compensation base, by real-time adjustment of the deposition compensation amount of the forming actionhead, plane distortion of the additive substrate is cumulatively compensated layer by layer; and finally an upper surface close to an ideal plane is obtained on the finally-completed plane distortioncompensation base, and upper surface is used as a reference plane for a three-dimensional printed part. By means of the method, high flatness of the additive substrate does not need to be ensured, complicated and precise multi-point leveling mechanisms are not needed, large-format deposition additive operation can be realized, and the material and processing cost of the additive substrate can be reduced.

Description

Technical field [0001] The invention belongs to the category of electromechanical methods, and specifically relates to a plane distortion compensation method. Background technique [0002] With the rapid development of 3D printing technology, the application of 3D printed parts, especially large-sized parts, has developed rapidly. In the process of using fused deposition methods, such as FDM (Fused Deposition Modeling) and LMD (Laser Fused Deposition) to print large-size plastic or metal three-dimensional parts, it is used as an additive substrate for the deposition starting surface and reference surface, and its flatness is required Also getting higher. When the flatness deviation of the additive substrate is large, it will not only cause the initial deposition layer to warp and cause printing failure, but also cause the print head and the additive substrate to scratch and collide, causing major equipment damage accidents. At the same time, in 3D printers, additive substrates ...

AI Technical Summary

Problems solved by technology

When the flatness deviation of the additive substrate is large, it will not only cause warping of the initial deposition layer, which will lead to printing failure, but also cause scratches and collisions between the print head and the additive substrate in severe cases, resulting in major equipment damage accidents

At the same time, in 3D printers, additive substrates are generally designed as quick-disassembly parts and wearing parts. Therefore, relying on improving the mechanical strength of the substrate and improving the processing accuracy to ensure its flatness is not only costly, but also structurally difficult. In terms of design, such as installation space, weight, etc., there are major limitations

[0003] In order to ensure the flatness of the additive substrate in the 3D printing coordinate system, the traditional method generally regards the additive substrate as a rigid whole, and sets manual adjustment bolts at its four corners, and then relies on measuring tools such as feeler gauges and repeated manual adjustments to achieve increasing. The flatness of the substrate relative to the print head, but the operation is cumbersome and cannot correct the plane distortion of the substrate itself

In order to achieve automatic leveling, CN106827540A discloses an automatic leveling mechanism for additive substrates using 3-point support and controlled by 3 Z-axis motors, but there are still limitations in that the driving mechanism is complex and the plane distortion of the substrate itself cannot be corrected

In addition, CN207496021U also discloses a leveling scheme for the additive substrate based on a single Z-axis motor and multiple electromagnetic clutches, but it is still unable to correct the plane distortion of the additive substrate itself, and can only adjust its overall Parallelism

At present, in the field of 3D printing, there is still a lack of a simple and technically feasible structural scheme and control method that can compensate for the plane distortion of large-scale additive substrates.

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