Selective laser melting forming type two-way reciprocating powder paving device and control method thereof

Abstract

The invention discloses a selective laser melting forming type two-way reciprocating powder paving device and a control method thereof. The device comprises a powder supplying assembling body, a powder paving assembling body, a dust-free linear conveying assembly, a left cutter aligning instrument, a right cutter aligning instrument and a base platform, wherein the powder paving assembling body comprises a left scraping knife, a right scraping knife, a left ranging instrument, a right ranging instrument, a left scraping knife height adjusting assembly, a right scraping knife height adjusting assembly and a powder storing area; the powder supplying assembling body is used for supplying powder to the powder storing area of the powder paving assembling body; the dust-free linear conveying assembly is positioned at the side edge of the base platform; the powder paving assembling body can leftwards and rightwards move along the dust-free linear conveying assembly; and a base plate is arranged on the base platform. The control method is applicable to the two-way powder paving device. With the adoption of the device and the control method, the height of the scraping knives at two sides can be adjusted and controlled in real time, so that the consistency of effect of paving powder twice can be ensured.

Description

technical field [0001] The present application relates to the technical field of additive manufacturing, in particular to a selective laser melting forming bidirectional reciprocating powder spreading device and a control method thereof. Background technique [0002] With the continuous development of 3D printing technology, 3D printing technology of metal parts, as the most cutting-edge and most potential technology in the entire 3D printing system, has begun to receive more and more attention. In view of the problems of high mold cost, low material utilization rate, long production cycle and other problems in forming parts with complex shapes by traditional processing technology, selective laser melting technology (SLM, Selective Laser Melting) has become the main development direction of rapid prototyping in the future. Compared with traditional processing technology, this technology has many advantages, mainly reflected in the fact that it can directly form metal parts w...

AI Technical Summary

Problems solved by technology

[0005] For the powder spreading mechanism of the single-pole mode, the efficiency is low, the time is long, and the powder spreading effect is limited by the single powder supply amount.

For the double-knife mode, there is a technical problem that it is difficult to adjust the scrapers on both sides to the same level, which will cause differences in the effect of two consecutive powder coatings, which will also affect the forming of the part; in addition, due to the double-knife device in the printing process There is a powder storage area in the middle of the scrapers on both sides, and the powder cleaning is usually performed after multiple powder laying, so most of the powder laying powder on the printing platform will contain a certain amount of large particle powder after laser sintering , so the laid powder is polluted powder, which will not only affect the forming of parts, but also cause scraping by the scraper

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