Scraper-free selective laser melting additive manufacturing process

Abstract

According to the scraper-free selective laser melting additive manufacturing process, part preparation is conducted through a scraper-free selective laser melting preparation structure; the scraper-free selective laser melting preparation structure comprises a forming base plate arranged in a forming cabin, a laser generator used for emitting laser beams is correspondingly arranged at the top of the forming cabin, and the forming cabin is further correspondingly provided with a powder feeding device and a powder pressing plate. The forming method comprises the steps that (1) a powder feeding device feeds forming material powder to a forming base plate, and then resetting is conducted; (2) compacting the forming material powder on the forming base plate by a powder pressing plate, and then resetting; (3) laser selective melting forming is conducted through light-emitting laser beams of the laser transmitter, and the formed substrate is lowered by one thickness; and (4) the steps (1)-(3) are repeated till part preparation is completed.

Description

technical field [0001] The present invention relates to precision manufacturing technology, in particular to precision molding technology, specifically, it shows a scraperless laser selective melting additive manufacturing process. Background technique [0002] With the development of aerospace and military equipment, higher requirements are put forward for the equipment manufacturing industry. [0003] Laser selective melting additive manufacturing technology is a common precision preparation technology. Traditional laser selective melting additive manufacturing technology uses a scraper to spread powder layer by layer. The printing process can be divided into "scraper powder spreading-laser sintering-forming cylinder drop-powder cylinder Rise-powder", repeat the above steps until the part is printed. [0004] The process of powder spreading by the scraper has special requirements on the placement angle of the parts. When the forming angle is lower than 45° and the shape i...

AI Technical Summary

Problems solved by technology

[0004] The process of powder spreading by the scraper has special requirements on the placement angle of the parts. When the forming angle is lower than 45° and formed against the forward direction of the scraper, it is easy to cause the edge of the part to warp and jam the scraper, which eventually leads to the failure of the part to be printed.

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