Metal powder granularity screening device for selective laser melting forming

A technology of laser selective melting and metal powder, which is applied in the fields of filtration and sieving, solid separation, chemical instruments and methods, etc. It can solve the problems of ineffective powder particle size classification, fine powder easily clogging the screen, and low powder screening efficiency. , to achieve the effect of ensuring stability, preventing stagnation, and reducing the probability of blockage

Pending Publication Date: 2022-02-18
AEROSPACE HIWING HARBIN TITANIUM IND
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  • Application Information

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Problems solved by technology

[0003] The present invention aims at problems such as the "arch bridge effect" existing in the screening process of the existing metal powder screening device, the fine powder is easy to block the screen, the powder screening efficiency is low, and the powder particle size classification effect is not obvious, etc., and provides a laser Metal powder particle size screening device for selective melting and forming

Method used

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  • Metal powder granularity screening device for selective laser melting forming
  • Metal powder granularity screening device for selective laser melting forming

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Experimental program
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Embodiment 1

[0026] Such as figure 1 As shown, the vibrating screen body of the device includes a feeding mechanism and a screening mechanism. The outer wall of the feeding mechanism is installed above the outer wall of the screening mechanism. One layer of screening bottom curtain 11 is set, and vibrating balls 10 are arranged between each layer of screen mesh 12 and the screening bottom curtain 11 arranged below it, and ultrasonic transducer 5 is installed on the outer wall of the screening mechanism, ultrasonic transducer 5 It is on the same plane as the screen cloth 12 located below. In this way, the device of the present invention is provided with two layers of screens 12 with different diameters, so that the target metal powder can be screened out at one time, and the powder screening efficiency can be improved. And by introducing the ultrasonic converter 5 in the fine powder screen layer, it solves the situation that the fine powder is easy to block the screen due to the presence o...

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Abstract

The invention discloses a metal powder granularity screening device for selective laser melting forming, and belongs to the technical field of preparation of special equipment for screening metal powder for additive manufacturing. The problems that an arch bridge effect exists in the screening process of an existing metal powder screening device, fine powder easily blocks a screen, the powder screening efficiency is low, and the powder size grading effect is not obvious are solved. The device comprises a multi-layer screen, an ultrasonic conversion device, a rubber elastic vibration ball and the like. Target powder is screened out by adjusting the combined action of ultrasonic vibration and the vibrator, coarse and fine particles in metal powder are separated through ultrasonic vibration, the probability that fine powder is adhered and taken away by the coarse powder is reduced, meanwhile, the situation that the fine powder is blocked can be reduced through high-amplitude vibration of the vibrator, and the powder screening rate can be overall improved through vibration bounce of the elastic vibration ball; and fine screening work of the metal powder for additive manufacturing is achieved.

Description

technical field [0001] The invention relates to a metal powder particle size screening device for laser selective melting and forming, and belongs to the technical field of preparation of special equipment for metal powder screening for additive manufacturing. Background technique [0002] Metal powder is a form of solid existence. After the vacuum atomization powder is prepared, the powder needs to be sieved. Metal powder products in different application fields have different requirements for powder particle size. The quality of the product is greatly affected. In order to meet the technical conditions of metal powder for additive manufacturing, the powder particle size range should be as narrow as possible, and the average particle size of the powder should be controlled within the target requirement range to ensure that the powder can be spread smoothly during the additive manufacturing process to achieve the structure and performance of the target product. This require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B1/28B07B1/42B07B1/46B22F3/105B33Y40/10
CPCB07B1/28B07B1/42B07B1/46B07B1/4609B33Y40/10B07B2201/04Y02P10/25
Inventor 田操刘邦涛陈卓侯继伟刘振军邓姗珊
Owner AEROSPACE HIWING HARBIN TITANIUM IND
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