Laser head containing moving atmosphere chamber and method for laser additive nonferrous metal

A technology of laser additive materials and non-ferrous metals, which is applied in the field of laser additive non-ferrous metals and laser heads, which can solve the problems of difficult to realize industrial applications, difficult to ensure the stability of the inert atmosphere in the additive area, and the limitation of processing space, so as to improve the accuracy of additive materials. Efficiency and quick response capability, shortened complex preparation process, strong flexibility effect

Active Publication Date: 2019-06-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 201610986062.3 discloses a laser additive manufacturing forming method for titanium alloy thin-walled components. During the implementation of this method, the dependence on the inert atmosphere chamber is high, and the efficiency of inert gas filling and exhausting is low. The time for a suitable processing environment is longer, and the processing space is also limited by the volume of the inert cabin
Adding non-ferrous metals by laser direct metal deposition also requires the establishment of a small fixed inert gas protection box. The size of the deposited workpiece is limited by the inert gas protection box, making it difficult to achieve industrial applications
In addition, the patent 201711113696.9 proposes a laser additive manufacturing or remanufacturing conformal protection method. This method can save the inert gas cabin, is light and flexible, and is convenient for transportation. However, the protective cover used in this method has a large space filled with argon gas. The idea of ​​"light gas" driving out "heavy gas" is easily disturbed by the movement of external air during the fast movement process. The probability of oxygen and nitrogen in the air entering the molten pool is high, and it is difficult to ensure the stability of the inert atmosphere in the additive area. Sex, and the protective cover is not suitable for additive manufacturing of non-ferrous metals in underwater environments

Method used

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  • Laser head containing moving atmosphere chamber and method for laser additive nonferrous metal
  • Laser head containing moving atmosphere chamber and method for laser additive nonferrous metal
  • Laser head containing moving atmosphere chamber and method for laser additive nonferrous metal

Examples

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Effect test

Embodiment 1

[0028] Example 1: as Figure 1-3 As shown, the laser head 10 with a moving atmosphere chamber according to the present invention includes a cylindrical protective cover 100, a connecting surface 200 at the top of the protective cover 100, and a laser head whose one end passes through the connecting surface 200 and is sealed and fixed to the protective cover 100. The main body 300 and the optical fiber transmission module 400 connected to the main body of the laser head.

[0029]The bottom edge of the protective cover 100 expands outward to form a trumpet-shaped protective outer edge 130. The bottom edge of the protective outer edge is located on the same horizontal plane and is used for contacting the substrate 700. The upper end of the protective cover 100 is provided with an inertial opening on the outer wall surface of the protective cover. The gas inlet 110, the inert gas inlets are evenly distributed along the circumference of the outer wall of the protective cover, there...

Embodiment 2

[0033] Example 2: Laser additive non-ferrous metals in air using a laser head with a moving atmosphere chamber:

[0034] The first step: connect the laser head 10 containing the moving atmosphere chamber to the CNC machine tool equipment, and continuously introduce argon or helium with a purity of 99.999% as an inert gas through the inert gas inlet 110 set on the protective cover 100. The gas is sprayed from the outlet nozzle 121 through the second gas channel 120 to form an inert protective gas curtain, and at the same time, the inert gas is continuously introduced from the first gas channel 310 located on the main body 300 of the laser head, which can protect the molten pool from being oxidized and prevent the molten pool from being oxidized. The inert gas ejected from the head body and the inert gas ejected from the outlet nozzle together form an inert gas protective atmosphere 600 to establish a working environment for laser additive materials. Laser additive can be perfor...

Embodiment 3

[0038] Example 3: Underwater laser additive non-ferrous metals using a laser head with a moving atmosphere chamber:

[0039] Step 1: Add an outer cover 500 to the main body 300 of the laser head, fix the bottom end of the outer cover 500 to the connecting surface, connect the protective cover 100, the main body 300 of the laser head, and the outer cover 500 to the remote-controlled submersible, using the first step in Example 2 The method forms an inert gas protective atmosphere 600 .

[0040] Step 2: Put the above device into the designated water area, and the ROV adjusts the position through the push fans in different directions. Through the underwater camera system, the main body of the laser head 300 is vertically aligned with the area to be added. Before the ROV is launched, it is inert. The gas inlet 110 and the first gas channel 310 are continuously supplied with argon gas or helium gas, and gas is continuously supplied during the whole process of the additive process. ...

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Abstract

The invention discloses a laser head containing a moving atmosphere chamber and a method for laser additive nonferrous metal. The laser head containing the moving atmosphere chamber comprises a protective cover, a connecting surface is arranged at the top end of the protective cover, a laser head main body is fixedly connected to the protective cover in a sealed mode, and a first gas channel usedfor introducing inert gas into a molten pool is arranged on the laser head main body; and inert gas inlets which are formed in the outer wall surface of the protective cover are formed in the protective cover, a second gas channel communicating with the gas inlets is formed in the cover body of the protective cover, and an outlet nozzle of the second gas channel is located at the bottom edge of the protective cover. According to the method, the moving atmosphere chamber is used for forming a movable inert atmosphere in air or under an underwater environment to carry out additive manufacturingof the metal and alloy, in the moving atmosphere chamber, laser deposition adopts a layer-by-layer accumulation mode to complete the specified deposition shape; and a fixed vacuum chamber with a largesize does not need to be established, the equipment cost is saved, and the nonferrous metal with excellent performance can be additive manufactured under a specific process condition.

Description

technical field [0001] The invention relates to laser additive equipment, in particular to a laser head containing a moving atmosphere chamber in the laser additive equipment and a method for laser additive non-ferrous metals. Background technique [0002] Non-ferrous metals include titanium and titanium alloys, aluminum and aluminum alloys, magnesium and magnesium alloys, copper and copper alloys, etc. Due to their high specific strength and specific stiffness, and easy forming, they are widely used in aerospace, aircraft, automobiles, etc. , medical, chemical, marine engineering and other fields. When forming non-ferrous metals, complex molds need to be designed and manufactured, and multiple processing procedures are required, the processing and forming cycle is long, and the production cost is high. Laser additive manufacturing is a technology that uses digital models to manufacture solid parts by means of layer-by-layer accumulation. This technology can effectively imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/34B23K26/342B22F3/105
CPCY02P10/25
Inventor 孙桂芳王占栋张胜标倪中华
Owner SOUTHEAST UNIV
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