Manufacturing method for shape follow-up supporting model for selective laser melting metal additive manufacturing
A selective laser melting and metal additive technology, which is applied in the field of metal additive manufacturing, can solve problems such as large internal stress, affecting the normal use of parts, and shape deviation of parts, so as to reduce thermal stress deformation, reduce temperature gradient, reduce The effect of internal stress
Inactive Publication Date: 2017-05-10
北京航信增材科技有限公司
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Problems solved by technology
As mentioned above, the general support 202 can vertically conduct the heat generated by the parts during the manufacturing process. When dissipating heat in the vertical direction, a large temperature gradient will be generated. In addition, different heights of the parts and different regions of the same height will not solidify at the same time, which will generate a large internal stress. The general support mentioned above is in heat conduction and stress resistance. Deformation will appear weak
In addition, when the stiffness in the horizontal direction of the part is insufficient and there are stresses, the above-mentioned support that can only restrain the deformation in the vertical direction of the part can not do anything about it
Once the parts are deformed during the manufacturing process, the manufacturing process cannot continue, resulting in waste of time and materials
Even if the manufacturing can be completed, the shape and position of the part will be deviated due to deformation, which will affect the normal use of the part
Method used
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[0020] Selected area laser melting metal additive manufacturing technology is based on the three-dimensional model data of the part, and the physical part is made by means of material accumulation through the forming equipment. The manufacturing method of the conformal support model of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings are only for illustration and should not be construed as limiting the present invention.
[0021] image 3 A flow chart of the manufacturing method of the conformal support model of the present invention is shown. In step S301, a three-dimensional part model is created by using three-dimensional drawing software. Specifically, the format of the 3D part model needs to be compatible with the drawing software. Open the 3D drawing software, load the 3D part model to be added with conformal support into the software, and then place the parts according to the fi...
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Abstract
The invention relates to a manufacturing method for a shape follow-up supporting model for selective laser melting metal additive manufacturing. The manufacturing method comprises the following steps of: a, establishing a model of a three-dimensional part by utilizing a three-dimensional drawing software; b, determining the position of a shape follow-up support; c, manufacturing an original shape follow-up supporting model according to the position determined in the step b; d, putting the original shape follow-up supporting model on the position determined in the step b; e, removing a part, superposed with the part, in the original shape follow-up supporting model through Boolean operation to obtain a middle shape follow-up supporting model; and f, pruning away the excessive part of the middle shape follow-up supporting model through a pruning function to obtain a final shape follow-up supporting model.
Description
technical field [0001] The invention relates to the field of metal additive manufacturing, in particular to a method for manufacturing a conformal support model for selective laser melting metal additive manufacturing. Background technique [0002] Selective laser melting metal additive manufacturing has a similar manufacturing state to metal welding, that is, a large amount of heat is generated during the manufacturing process. When the thermal conductivity of the material is small and / or the shape of the part is not conducive to heat dissipation, a certain temperature gradient will be formed; and due to different heights and different regions in the horizontal direction, they will not melt and solidify at the same time. The two factors of temperature gradient and non-simultaneous melting and solidification will cause a large internal stress. If it is not improved through reasonable methods, the parts will be distorted and deformed, hindering the continuation of the manufac...
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IPC IPC(8): B22F3/105
CPCB22F10/00B22F10/47B22F10/80B22F10/28Y02P10/25
Inventor 王志会许淑泽
Owner 北京航信增材科技有限公司
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