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Metal sample 3D printing forming method with defect presetting process

A metal sample, 3D printing technology, applied in the direction of improving process efficiency, improving energy efficiency, additive manufacturing, etc., can solve the problems of material organization, performance change, and inability to measure mechanical properties, and achieves improved sample preparation accuracy, Simplify the difficulty of sample preparation and ensure the effect of continuity

Inactive Publication Date: 2018-08-24
无锡市产品质量监督检验院
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Problems solved by technology

[0005] The purpose of the present invention is to provide a 3D printing forming method for metal samples with preset defects in view of the defects in the prior art. The current method of preparing internal defects in metal samples causes changes in material structure and performance, which cannot be used to measure mechanical properties. , and can accurately and plannedly preset more types, sizes, distributions, and quantities of defects

Method used

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  • Metal sample 3D printing forming method with defect presetting process
  • Metal sample 3D printing forming method with defect presetting process

Examples

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Embodiment example

[0021] This case is to prepare a TC4 titanium alloy sample 10 with 3 pore defects 6 and 1 crack 9. The size of the sample is 20*20*20mm, the diameter of the pore is 0.05mm~0.1mm, and the crack length is 8mm. Its specific preparation process is as follows:

[0022] Step 1, utilize three-dimensional modeling software, such as Pro-E, UG, Solidworks etc. to carry out the modeling of TC4 titanium alloy sample 10;

[0023] Step 2, adding the required size and position of defects 6 and 9 to the sample model to form a three-dimensional model with defects;

[0024] Step 3. Select a laser selective melting (SLM) 3D printing device of appropriate size, use the software supporting the printer to slice the 3D model and plan the printing path, and then set the printing parameters;

[0025] Step 4: Place the substrate 8 on the lifting platform 7 of the forming platform, pass through the protective gas 2 , and the laser beam 12 generated by the laser 1 enters the forming cavity 11 after bein...

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Abstract

The invention discloses a metal sample 3D printing forming method with a defect presetting process. The 3D printing forming method comprises the following steps that 1, according to the actual size and shape of a required metal sample, a three-dimensional modeling software is adopted for data model designing; 2, different types of defects of a certain number, size and distribution are designed, and modifying is carried out in a three-dimensional model; 3, the slicing treatment is carried out on the designed model, contour data of each layer are obtained, and a forming path is planned; and 4, proper 3D printing metal powder is selected according to the material of the metal sample, and an SLM 3D printer with appropriate forming size is selected for printing and forming. According to the method, the 3D printing forming method is introduced into the preparation of the metal sample internally provided with the defects for the first time, the existing sample preparation difficulty is greatly simplified, and the sample preparation precision is improved; and a selective laser melting (SLM) 3D printing device is used so that the metal samples with various complex shapes can be prepared.

Description

technical field [0001] The invention relates to a 3D printing forming method of a metal sample with preset defects. Background technique [0002] At present, metal 3D printing technology is gradually mature, and has been applied in aerospace, medical, automobile, nuclear power and other fields. The defects formed by technologies such as , forging, and welding are different, and the existing evaluation methods are not applicable, and it is impossible to determine the influence of different types and sizes of defects on the mechanical properties of metal formed parts. As a result, the current application of metal 3D printed formed parts is basically It is limited to structural parts that do not require high mechanical properties. [0003] Through industrial CT, ultrasonic and other non-destructive testing technologies, it is found that the main defects in metal 3D printed parts are air bubbles (porosity), cracks, and poor fusion. For the preparation of metal samples with buil...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/66B22F12/49B22F12/63B22F10/28Y02P10/25B22F10/20
Inventor 周滢吕新峰冒浴沂
Owner 无锡市产品质量监督检验院
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