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System and method for additive forming of metal parts

A technology of additive molding and metal parts, which is applied in the field of metal 3D printing, can solve the problems of unsmooth powder falling, easy clogging, and easy powder sputtering, etc., and achieve the effects of improving reliability, smooth pushing, and accurate powder feeding volume

Active Publication Date: 2022-05-24
SICHUAN ENG TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a system and method for additive molding of metal parts to solve the problems of concentrated powder falling points in the upper powder box in the prior art, dense metal powder at the powder outlet that is easy to block, and falling powder that is easy to sputter. The resulting low utilization rate of the metal powder in the upper powder box and unsmooth powder falling

Method used

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  • System and method for additive forming of metal parts
  • System and method for additive forming of metal parts
  • System and method for additive forming of metal parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] like Figure 1 to Figure 3 A metal part additive molding system as shown includes a molding chamber 1, and a powder spreading platform 3 is arranged in the molding chamber 1, and a molding cylinder 4 and a lower powder box 6 are arranged under the powder spreading platform 3, and the powder spreading platform 3 is provided. An upper powder box 5 is arranged above the platform 3, and a first driving device 7 is arranged on the powder spreading platform 3. The first driving device 7 is used to drive the scraper 8 to be transferred from the upper powder box 5 or the lower powder box 6 to the powder spreading. The metal powder on the platform 3 is scraped and sent to the forming cylinder 4 for printing. The heat insulating frame 2 is arranged above the forming cylinder 4, and the bottom of the upper powder box 5 is provided with a feeding tray 52. ​​The feeding tray 52 is provided with several The second through hole 521 , a rotating plate 51 rotatable relative to the unloa...

Embodiment 2

[0063] On the basis of Example 1, as Figure 2 to Figure 5 In the illustrated metal parts additive molding system, the rotating plate 51 is provided with a connecting column 512, the connecting column 512 movably penetrates the unloading plate 52 and extends to the top of the unloading plate 52, the connection The column 512 is provided with a stirring plate 53 located above the unloading plate 52. The stirring plate 53 is provided with a plurality of third through holes 531. In the open state, the third through holes 531 are connected to the first through holes. 511 and the second through hole 521 together constitute a blanking channel.

[0064] In some embodiments, the connecting column 512 is provided with a first stirring member 513 , and the diameter of the first stirring member 513 gradually decreases along the direction from the connecting column 512 to the inner wall of the upper powder box 5 .

[0065] In some embodiments, an annular second stirring member 532 is dis...

Embodiment 3

[0072] On the basis of Example 2, as image 3 , Figures 6 to 8 As shown, a first groove is formed on the lower surface of the stirring plate 53, a spring 534 is arranged in the first groove, and a scraper 533 is connected to the spring 534. In the open state, the The scraping member 533 is integrally located in the first groove. In the closed state, the scraping member 533 enters the second through hole 521 to scrape the metal powder in the second through hole 521 .

[0073] like Figure 8 As shown, in the open state, the scraper is entirely located in the first groove, the spring is compressed at this time, and the bottom of the scraper is in contact with the upper surface of the unloading tray. like Figure 7 As shown, in the closed state, with the rotation of the stirring plate, the first groove is aligned with the second through hole, and the scraper that loses its blocking is squeezed into the second through hole under the force of the spring, scraping , Squeeze the ...

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Abstract

The invention discloses a system and method for additive molding of metal parts. The system includes a molding chamber. A powder spreading platform is arranged in the molding chamber. A molding cylinder and a lower powder box are arranged below the powder spreading platform. An upper powder box is arranged above the powder spreading platform. The first driving device is set on the powder platform, and the first driving device drives the scraper to scrape the metal powder on the powder spreading platform into the forming cylinder. The bottom of the upper powder box is provided with a feeding tray, and the feeding tray is provided with a number of second through holes. A rotating disk is arranged below the feeding tray, and several first through holes are arranged on the rotating disk, and a toggle member is arranged on the first driving device, which is used to drive the rotating disk to switch between the closed state and the open state; in the closed state, the first The through hole is not connected to the second through hole; in the open state, the first through hole is connected to the second through hole to form a feeding channel, and the bottom end of the feeding channel is located between the scraper and the forming cylinder. By adopting the metal part additive forming system and method of the present invention, the powder falling is smooth and the utilization rate of the metal powder is high.

Description

technical field [0001] The invention relates to the technical field of metal 3D printing, in particular to a metal part additive forming system and method. Background technique [0002] Additive manufacturing, also known as 3D printing, is the process of stacking special metal materials, non-metal materials and medical biomaterials layer by layer according to extrusion, sintering, melting, light curing, spraying and other methods through software and numerical control systems to create solid objects. manufacturing technology. [0003] Powder bed electron beam 3D printing is an additive manufacturing technology that builds a solid product by melting metal powder layer by layer based on a digital model. However, due to the influence of the size of the powder bed electron beam additive manufacturing equipment itself and other structures inside the molding chamber, the size of the powder box is limited, and the metal powder contained is limited. In order to solve this problem,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F12/52B22F12/67B22F10/28B22F10/73B33Y30/00B33Y40/00
Inventor 胡津李登万刘浩杜东方张永盛韩俊峰李忠利胡雅清
Owner SICHUAN ENG TECHN COLLEGE
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