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Device for Improving the Density of Directly Formed Parts by Selective Laser Melting Process

A technology of selective laser melting and densification, which is applied in the directions of improving energy efficiency, process efficiency, and additive processing. wide range of effects

Active Publication Date: 2017-01-25
东营市东凯新材料技术研发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of low density of directly formed parts by selective laser melting, the invention provides a forming device that can improve the density and stability of the powder layer of the parts. The principle is that the charged powder is attracted to the high-voltage electrode under the action of the electric field force The charged powder is tightly adsorbed on the surface of the substrate or formed part through the electric field force, so that the density of the powder layer is increased, and the forming quality of the formed part is improved.

Method used

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  • Device for Improving the Density of Directly Formed Parts by Selective Laser Melting Process
  • Device for Improving the Density of Directly Formed Parts by Selective Laser Melting Process
  • Device for Improving the Density of Directly Formed Parts by Selective Laser Melting Process

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Experimental program
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Effect test

Embodiment 1

[0018] refer to figure 2 , the powder spreading module is composed of an insulating powder storage box 7 and a powder spreading roller 8, and the powder spreading roller is provided with two radially symmetrical grooves [ figure 2 (b)].

Embodiment 2

[0020] refer to image 3 ,Bundle figure 2 The powder spreading roller 8 is changed into a powder spreading scraper 14 in the middle, and a powder control plate 13 (with powder leakage slots) that can swing back and forth is increased on the powder spreading scraper.

[0021] During laser selective melting and forming, the electrode plate 9 is connected to a high voltage (50,000-200,000 volts), and electrostatic powder (metal or non-metallic powder) is placed in the powder storage box 7, and the electrostatic charge of the powder is connected to the electrode plate. The voltage polarity is reversed.

[0022] During the forming process, for Example 1: the powder spreading roller 8 is driven by the powder spreading motor 5 and rotates 180 degrees clockwise, and the charged powder is taken out by the groove on the powder spreading roller 8 and dumped on the right side of the powder spreading roller 8 (front side), and then the powder spreading module moves to the right (front) ...

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Abstract

The invention discloses a device for improving the density of a part directly formed through the selective laser melting process. The device comprises a box-type powder tank, a supporting board capable of holding a forming base board is arranged above the powder tank, and the lower face of the powder tank is connected with an ejector rod. The device is characterized in that the upper face of the supporting board is connected with an electrode board with the high direct voltage; guide rails with sliding blocks are arranged on the left side and the right side of the powder tank, a powder laying module located above the supporting board of the powder tank is connected between the two sliding blocks, a guide rail motor is arranged at the rear end of the guide rail on one side, and lead screw nuts in the sliding blocks are connected so as to drive the powder laying module to move horizontally forwards and backwards along the powder tank; the sliding block of one guide rail is provided with a powder laying motor used for driving a powder laying mechanism in the powder laying module to act.

Description

technical field [0001] The invention relates to a laser additive manufacturing technology, in particular to a forming device for selective laser melting of metal and nonmetal powders. Background technique [0002] Additive manufacturing technology is a new technology that emerged at the end of the last century. In the 21st century, additive manufacturing technology has developed rapidly. Among them, the United States has positioned additive manufacturing technology as a national new technology strategy. The strong support in the manufacturing field has set off an upsurge of additive manufacturing research across the country. Additive manufacturing has a wide range of research fields, including additive manufacturing of metals, polymers and other materials. Among them, the additive manufacturing technology in the polymer field is quite mature. Metal additive manufacturing includes metal cladding, selective laser melting, and arc welding accumulation. Compared with the field ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y30/00
CPCY02P10/25
Inventor 李涤尘张连重
Owner 东营市东凯新材料技术研发有限责任公司