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A powder bed device for laser additives and its laser additive method and application

A laser additive and powder bed technology, applied in the direction of additive processing, process efficiency improvement, additive manufacturing, etc., can solve the problems of metal powder waste, substrate heat deformation, etc., to reduce the actual amount, improve substrate deformation, cost reduction effect

Inactive Publication Date: 2019-04-09
TIANJIN UNIV
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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 overcome the waste of metal powder by existing devices and equipment and the thermal deformation of the base material during the forming process, and propose a simple new powder bed device to improve these aspects, and it is easy to operate and simple to manufacture. Realize high-precision manufacturing of small-sized and complex metal parts in a single piece

Method used

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  • A powder bed device for laser additives and its laser additive method and application
  • A powder bed device for laser additives and its laser additive method and application
  • A powder bed device for laser additives and its laser additive method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The equipment of the embodiment of the present invention adopts Nd:YAG laser wavelength 1.06um, the focal length of the focusing lens is 80mm, the thickness of the substrate is 6mm, the protective gas used in the experiment is Ar gas, the substrate material is Q235, 316L stainless steel powder, and the powder particle size is 500 mesh , the selected parameters are shown in Table 1 and Table 2. Different laser powers and different scanning speeds are used for single-layer and single-pass forming, and the forming corresponds to Figure 11 , Figure 12 .

[0072] Table 1

[0073]

[0074] Table 2

[0075]

[0076]

Embodiment 2

[0078] The equipment of the embodiment of the present invention adopts Nd:YAG laser wavelength 1.06um, the focal length of the focusing lens is 80mm, the thickness of the substrate is 6mm, the protective gas used in the experiment is Ar gas, the substrate material is Q235, 316L stainless steel powder, and the powder particle size is 500 mesh , the selected parameters are shown in Table 3. The distance between the centerlines of the two melting channels is 0.4mm, and two-layer multi-pass forming is performed, and the results correspond to Figure 13 shown.

[0079] table 3

[0080]

Embodiment 3

[0082] The equipment of the embodiment of the present invention adopts Nd:YAG laser wavelength 1.06um, the focal length of the focusing lens is 80mm, the thickness of the substrate is 6mm, the protective gas used in the experiment is Ar gas, the substrate material is Q235, 316L stainless steel powder, and the powder particle size is 500 mesh , the selected parameters are shown in Table 4. The distance between the centerlines of the two melting channels is 0.4mm, and five layers and three passes are formed, and the results correspond to Figure 14 shown

[0083] Table 4

[0084]

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Abstract

The invention discloses a powder bed device for laser material addition and its laser material addition method and application. Two copper splints are symmetrically arranged on the left and right sides of the top of the base. There is a threaded column, the upper nut and the lower nut are threadedly matched with the threaded column, the lower nut is set at the bottom of the copper splint, the upper nut is set at the top of the copper splint; the top of any copper splint is provided with a cooling water pipe, the cooling water pipe It is set on the edge of the copper splint in the shape of "Π", the water inlet port of the cooling water pipe is connected with the water tank through the water supply pipe, and the water outlet port of the cooling water pipe is connected with the drainage pipe; the base is set in the glass cover, and the top of the glass cover is provided with The glass cover, the left side wall of the glass cover is provided with an air inlet through the inert protective gas, the right side wall is provided with an inert protective gas outlet, and the left and right side walls of the glass cover are also provided with holes for the water supply pipe to pass through. A water inlet and an outlet through which a drain pipe passes.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing and technology, in particular to a powder bed device for laser additive and its laser additive method and application. Background technique [0002] Laser additive manufacturing is a high-end forming technology developed in the mid-1990s. In recent years, it has developed into an advanced manufacturing technology integrating optics, mechanics, electricity and new materials. Among them, laser additive manufacturing based on powder bed includes selective laser melting technology (Selective Laser Melting, referred to as SLM), selective laser sintering (selective laser sintering, SLS) and selective electron beam melting (selective electron beam melting, SEBM) and other processes. SLM technology is developed from SLS technology, and there are some differences between them. The manufacturing process of SLS technology is complex, and the performance and precision of the manufactured...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y30/00B33Y10/00
CPCB33Y10/00B33Y30/00B22F10/00B22F12/41B22F10/36B22F10/28B22F10/366B22F12/70B22F10/32B22F12/20Y02P10/25
Inventor 杨立军邱文聪赵德金赵圣斌
Owner TIANJIN UNIV
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