Small titanium alloy additive manufacturing atmosphere protection device and using method thereof

A technology for additive manufacturing and protection devices, which is applied in the field of small-scale titanium alloy additive manufacturing atmosphere protection devices, can solve problems such as air leakage, low reliability of sealing devices, and film rupture, achieving low risk of air leakage, simple structure, The effect of safety improvement

Pending Publication Date: 2022-07-29
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The sealing material used in this invention is a 0.3mm high-temperature-resistant film. During the additive manufacturing process, the splash of high-temperature metal powder will undoubtedly impact the top and side films. In the long-term, high-power titanium alloy additive manufacturing Under certain conditions, the reliability of the sealing device is not high, and the risk of film rupture and air leakage may occur

Method used

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  • Small titanium alloy additive manufacturing atmosphere protection device and using method thereof
  • Small titanium alloy additive manufacturing atmosphere protection device and using method thereof
  • Small titanium alloy additive manufacturing atmosphere protection device and using method thereof

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Experimental program
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Effect test

Embodiment 1

[0043] Some technical terms appearing in the present invention are explained.

[0044] Micro positive pressure means that in a closed environment, the air pressure of the internal environment is slightly greater than the air pressure of the external atmospheric environment, so that the flow of gas is always from the inside to the outside, preventing the external impurity gas from entering the closed environment.

[0045] 1ppm means one part per million of the gas concentration.

[0046] PLC is the abbreviation of Programmable Logic Controller (Programmer Logic Controller).

[0047] The invention provides a small titanium alloy additive manufacturing atmosphere protection device, such as Figure 1-2 As shown, it includes an acrylic box 2.1, a flow control box 4.1, and a PLC control box 4.2. The acrylic box 2.1 is provided with a water cooling device 3.2, a substrate 3.3, a laser cladding instrument and an oxygen concentration detector 2.7. The water cooling device 3.2 is used...

Embodiment 2

[0050] The present invention provides a small titanium alloy additive manufacturing atmosphere protection device. On the basis of Example 1, further, such as Figure 1-5 As shown, the acrylic box 2.1 is placed on the working platform 1.1, and the working platform 1.1 is provided with a moving device. The moving device includes an x-axis drive mechanism 1.6, a y-axis drive mechanism 1.2, and a z-axis drive mechanism 1.3. The x-axis drive mechanism 1.6 It is slidably connected to the working platform 1.1 and spans above the acrylic box 2.1, the y-axis drive mechanism 1.2 is slidably connected to the x-axis drive mechanism 1.6, and the z-axis drive mechanism 1.3 is slidably connected to the y-axis drive mechanism 1.2. The x-axis drive mechanism 1.6, the z-axis drive mechanism 1.3, and the y-axis drive mechanism 1.2 use conventional screw rods or pneumatic slide tables to adjust the spatial position of the laser head 1.4.

[0051] Further, the laser cladding apparatus is connected...

Embodiment 3

[0058] On the basis of Embodiment 2, the present invention provides a method for using a small-sized titanium alloy additive manufacturing atmosphere protection device, comprising the following steps:

[0059] Step 1. Place the acrylic box 2.1 on the surface of the working platform 1.1, put the bottom plate 3.1 into the bottom of the acrylic box 2.1, place the water-cooling device 3.2 in a suitable position on the bottom plate 3.1, and connect the water inlet pipe of the water-cooling device 3.2 And the return pipe is introduced to the outside through the small hole on the acrylic box 2.1, and the base plate 3.3 is placed on the water cooling base. The oxygen concentration detector 2.7 is fixed on the inner wall of the acrylic box 2.1, and the signal line is introduced to the outside through the holes in the acrylic box 2.1 to connect with the PLC control box 4.2.

[0060] Step 2: Adjust the laser head 1.4 to a suitable position through the moving device of the working platfor...

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Abstract

The invention discloses a small titanium alloy additive manufacturing atmosphere protection device and a using method thereof, and belongs to the technical field of additive manufacturing. Comprising an acrylic box body, a flow control box and a PLC control box, a water cooling device, a base plate, a laser cladding instrument and an oxygen concentration detector are arranged in the acrylic box body, an annular pipeline used for inputting argon is arranged along the inner wall of the acrylic box body, and a plurality of air holes are evenly distributed in the surface of the annular pipeline; the oxygen concentration detector is fixed on the inner wall of the acrylic box body and is connected with the PLC control box through a signal line; the annular pipeline is connected with the flow control box, and the PLC control box receives oxygen concentration content data from the oxygen concentration detector and adjusts the argon flow input from the flow control box to the annular pipeline. According to the device, the oxygen concentration content near an additive manufacturing area can be controlled within a reasonable range, so that the whole closed environment is kept in a micro-positive pressure state, and excessive waste of argon is avoided.

Description

technical field [0001] The invention relates to an atmosphere protection device for additive manufacturing, in particular to a small titanium alloy additive manufacturing atmosphere protection device and a method for using the same. Background technique [0002] Titanium alloy has many advantages such as high specific strength, high corrosion resistance, excellent performance at high temperature, good biocompatibility, etc. It is widely used in aerospace, marine ships, biomedicine and other fields; however, due to the poor thermal conductivity of titanium alloys, During machining, heat is easily accumulated at the tip of the tool, and the surface rebounds greatly during machining, which is prone to the phenomenon of "sticking to the tool", which makes the machining performance of titanium alloys inferior to steel and aluminum alloy materials. In the field of aerospace, titanium alloy is an important metal structure, such as titanium alloy aircraft frame beam structure; but i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F12/70B22F12/90B22F12/20B33Y30/00
CPCB22F12/70B22F12/90B22F12/20B33Y30/00
Inventor 何华兵周文强黄超叶春瑶李步金华永平
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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