Additive manufacturing method and additive manufacturing device for metal materials
A technology of additive manufacturing and metal materials, applied in the field of additive manufacturing, can solve problems such as limited effect, influence of powder coating thickness, influence of powder layer shrinkage, etc., to achieve the effect of improving workpiece quality and reducing defects
Active Publication Date: 2021-10-15
XIAN SAILONG AM TECH CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In addition, in addition to the influence of powder porosity, the splash of powder during the forming process and the thermal expansion of solidified metal will have a great influence on the shrinkage of the powder layer, and at the same time have a great influence on the actual powder coating thickness
If you continue to use the energy input corresponding to the preset powder coating thickness, it will cause a mismatch between the powder coating thickness and the energy input, resulting in defects such as poor interlayer bonding inside the formed part
In the existing technology, it is usually possible to reduce the thickness of the powder layer, use powder with a higher bulk density or optimize the preheating process to reduce powder splashing to suppress the impact of powder layer shrinkage on the forming quality, but the effect is limited
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] An example embodiment will now be described more fully with reference to the accompanying drawings. However, an example embodiment can be implemented in a variety of forms, and is not to be construed as being limited to the examples described herein; in contrast, the present disclosure will make the present disclosure will be more comprehensive and complete, and the concept of an example embodiment is fully conveyed A technician in the art. The features, structures, or characteristics described may be incorporated in one or more embodiments in any suitable manner.
[0035] Please refer to figure 1 , figure 1 Setting method for slice thickness in the existing additive manufacturing technology, such as figure 1 Among A 1 , A 2 , A 3 For the powder shrinkage of each layer, the thickness of each layer is equal to the H. After the top layer is released, the powder will be thermally mixed, so that the thickness of the powder layer after the melting shrinkage is smaller than the t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an additive manufacturing method and an additive manufacturing device for metal materials, and relates to the technical field of additive manufacturing. The method includes: establishing a three-dimensional model of the workpiece to be processed; calculating the slice thickness of each layer according to the preset powder coating thickness, powder splash degree, porosity and material thermal expansion state; performing slice processing and path planning; controlling the descent of the forming platform , powder spreading; the additive manufacturing device melts and scans the powder layer according to the preset melting process and path planning data, and repeats the steps of powder spreading and melting and scanning, so as to obtain the metal material. The present invention corrects the powder shrinkage according to the preset powder spreading thickness, powder splashing degree, powder porosity and material thermal expansion state, and obtains the corresponding slice thickness. The slice thickness is a gradient change, but the actual powder spreading thickness of each layer It is the same, so as to ensure that the energy input matches the powder coating thickness, reduce the internal defects of the workpiece, and improve the quality of the workpiece.
Description
Technical field [0001] The present invention relates to the field of additive manufacturing techniques, and more particularly to a method of manufacturing a metal material and a refueling manufacturing apparatus. Background technique [0002] The principle of manufacturing a molding method for the powder bed molten apron is to lay a layer of powder on the preset bottom plate. According to the part path planning data, the laying powder is selected to segment the laying powder, depending on the height of a layer thickness according to the slice data bottom plate. The next layer is made and melted, and the new melting layer is fused to the previous layer, and the layer is stacked until the parts are processed. [0003] It can be seen that the powder molten additive manufacturing is achieved by a layer-by-layer melting of loose metal powder, and there is a phenomenon of volume contraction after melting. Generally, the porosity of the powder by the powder is 0.4 to 0.6, which means th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/20B22F10/366B22F10/85B22F12/00B33Y10/00B33Y30/00
CPCB33Y10/00B33Y30/00
Inventor 李会霞车倩颖程康康朱纪磊汤慧萍
Owner XIAN SAILONG AM TECH CO LTD