A Controlled Composition Continuous Powder Feeding System

Abstract

The present invention involves a continuous powder delivery system, including the recycling system (1), powder delivery (2), continuous powder delivery switches (3), multi -way powder (4), control system (4), control system (control system (4), control system (control system (control system5) Atmospheric protection box (6), giving metering tube (7).Powder head (2) and multi -road powder delivery device (4) continuously powder delivery switch through controllable ingredients (3) can achieve rapid and continuous switching of a variety of powder, and the controllable component continuously pollination switch (3)Connect with the recycling system (1) to recycle the unused powder. The control of the controlled component continuously gourns switches (3), and multi -road powder delivery (4) control through the control system (5).The continuous pollination system of the control ingredients can be combined with the additive manufacturing system to realize the rapid and free switching of metal powder in the process of additive manufacturing, and meet the formation requirements of the flexible interface of the gradient structure.

Description

technical field [0001] The invention relates to a powder feeding system for laser additive manufacturing, in particular to a continuous powder feeding system with controllable components, belonging to the technical field of laser additive manufacturing. Background technique [0002] Laser additive manufacturing is a fast and flexible manufacturing technology. It adopts the concept of discrete accumulation and material growth, and breaks away from the shackles of traditional processes. It is a major leap in the field of manufacturing technology. At present, this technology has been applied to metals, ceramics, plastics and Preparation of various composite materials and repair of parts. [0003] Synchronous powder-feeding laser additive manufacturing technology organically combines rapid prototyping technology and laser cladding technology, uses metal powder as processing raw material, and adopts high-energy-density laser beam to clad and accumulate the powder sprayed on the m...

AI Technical Summary

Problems solved by technology

In the forming process of gradient structures of dissimilar alloys, not all interfaces of gradient structures are planes perpendicular to the forming height direction, and it is necessary to optimize the design of gradient structures of parts according to the specific temperature gradient environment; the traditional laser additive manufacturing process usually It needs to be carried out in the atmosphere protection box, especially when forming large-sized parts, the size of the protection box is relatively large, and the powder feeder needs to be placed outside the protection box due to the need for powder addition and other operations, resulting in a long powder feeding pipeline

In addition, from the start of the powder feeder, to the transmission of the metal powder with the carrier gas in the powder feeding pipeline, to the stable powder output of the powder feeding nozzle, the response time is relatively long

[0005] In the layer-by-layer accumulation process of a single material in laser additive manufacturing, the powder feeding process mostly adopts the preset powder feeding parameter method, that is, after adjusting the powder feeding rate and carrier gas flow rate, laser additive manufacturing starts after the powder feeding nozzle is stable. , but in this method, the powder acceleration time is long, and it is impossible to realize the fast and free switching of metal powder in the process of laser additive manufacturing gradient structure, so it is necessary to develop a controllable component continuous powder feeding system suitable for flexible interfaces

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