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Method for near-purification formation of parts

A near-net shape and parts technology, applied in the field of rapid prototyping, can solve problems affecting the shape and structural size of parts, and achieve the effect of avoiding pollution, avoiding deviation, and simple and easy process

Inactive Publication Date: 2006-11-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) After the hot isostatic pressing treatment, the sheath needs to be removed, so the shape and structural size of the part may be affected

Method used

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Examples

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Effect test

example 1

[0034] (1) First, according to the possible deformation of SLM parts after hot isostatic pressing, use 3D modeling software (such as UG, Pro / E, etc.) to design the CAD 3D model of the part before hot isostatic pressing, and then use the slicing software After processing, it is saved as an STL file, and the data information of the STL file is sent to the SLM rapid prototyping machine.

[0035] (2) Vacuumize the forming chamber of the SLM rapid prototyping machine.

[0036] (3) The powder feeding mechanism spreads a layer of stainless steel powder with a thickness of about 100 μm (particle size is about 20 μm) on the working platform.

[0037] (4) Use semiconductor pumped YAG laser or fiber laser with laser power greater than or equal to 100W, the laser spot is about 30μm, the scanning speed is about 200mm / s, the scanning distance is about 0.07mm, and the slice boundary of the layer is about 3mm The wide metal powder is scanned to melt the powder material at the boundary, and i...

example 2

[0042] (1) First, according to the possible deformation of SLS parts after hot isostatic pressing, use 3D modeling software (such as UG, Pro / E, etc.) to design the CAD 3D model of the part before hot isostatic pressing, and then use the slicing software After processing, it is saved as an STL file, and the data information of the STL file is sent to the SLS rapid prototyping machine.

[0043] (2) Vacuumize the forming chamber of the SLS rapid prototyping machine;

[0044] (3) The powder feeding mechanism spreads a layer of stainless steel powder with a thickness of about 100 μm (particle size is about 20 μm) on the working platform.

[0045] (4) Using CO with laser power greater than 100W 2 Laser, the laser spot is about 60μm, the scanning speed is about 100mm / s, and the scanning distance is about 0.1mm, scanning the stainless steel powder with a width of about 3mm at the slice boundary of this layer to sinter the powder material at the boundary; for this The powder material i...

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Abstract

A technology for manufacturing a part by proximal forming method includes such steps as inputting the 3D model of a part to a fast SLM or SLS machine, vacuumizing the shaping chamber of SLM or SLS machine, using laser to scan the metal powder outside the boundary for smelting it, scan the metal powder inside the boundary to form mesh structure, forming a compact shell sealed part, and HIP processing.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, in particular to a method for near-net-shaped parts. Background technique [0002] Hot isostatic pressing (HIP) is a comprehensive process method of powder forming developed on the basis of cold isostatic pressing and hot pressing technology, which can be used for near-net forming powders of various metals, ceramics, hard alloys and composite materials. Metallurgical components. It is made by assembling the package, filling it with metal powder, and putting it into a hot isostatic pressing furnace for hot isostatic pressing after vacuum pumping and sealing. After hot isostatic pressing, the powder in the mold will become a solid part with 100% density, and then remove the jacket by erosion treatment to obtain a part that is almost the same as the computer design. The mechanical properties of the metal parts manufactured by this technology are equivalent to those of the forging process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F3/105
CPCY02P10/25
Inventor 史玉升黄树槐刘锦辉魏青松任丽花
Owner HUAZHONG UNIV OF SCI & TECH
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