Selective laser melting device

Abstract

The invention discloses a selective laser melting device. The selective laser melting device comprises a motor, a scraper, a transmission mechanism used for transmitting the motor power to the scraper, a flatness detector and a computer, and the flatness detector detects the flatness of the upper layer of a forming piece in the powder paving process of the scraper and transmits the flatness data to the computer; the computer processes the flatness data and sends a stop signal to the motor to enable the scraper to stop paving powder after a warping signal is detected. The selective laser melting device is provided with the flatness detector and the computer, the flatness detector is capable of detecting the flatness of the upper layer of the forming piece and transmitting the flatness data to the computer in real time, once the processed part of the forming piece occurs warping deformation, the computer sends the stop signal to the motor to stop the powder paving movement of the scraper, the hard collision between the scraper and forming piece is avoided, and the loss due to material waste and scraper damage is avoided.

Description

technical field [0001] The invention relates to a powder processing molding device, in particular to a selective laser melting device. Background technique [0002] Selective Laser Melting (SLM) is a method of direct forming of metal parts. It is the latest development of rapid prototyping technology, which is based on the most basic idea of ​​rapid prototyping, that is, "incremental" manufacturing of layer-by-layer cladding In this way, parts with specific geometric shapes are directly formed according to the three-dimensional CAD model, and the metal powder is completely melted during the forming process to produce metallurgical bonding. Selective laser melting devices have attracted widespread attention because they can form complex metal parts that can be used directly, and are predicted to be one of the key technologies that may trigger the "third industrial revolution". Using the powder spreading method to ensure the levelness and uniformity of the powder layer is a c...

AI Technical Summary

Problems solved by technology

However, during the molding process of the workpiece, the processed part of the thermally deformed part tends to be warped and warped. This deformation makes the upper layer of the formed part bulge upwards, thereby hindering the continuous powder spreading movement of the scraper. When the resistance force is too large , the hard collision between the scraper and the formed part will not only make the processed parts scrapped and cause a great waste of materials, but even damage the scraper and have to stop the processing, especially when processing some larger parts. directly lead to huge losses

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