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Multi-wavelength laser processing light path system of melting additive manufacturing equipment

An optical path system and laser processing technology, applied in the field of metal additive manufacturing, can solve the problems of reducing speed, reducing the service life of the optical path system, reducing the effective utilization rate of energy, etc.

Pending Publication Date: 2020-11-10
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Application Information

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Problems solved by technology

[0002] In the field of metal additive manufacturing, the center wavelength of lasers usually used is 1064nm, and the absorption rate of this wavelength band is much lower than 532nm during the sintering and forming process of powders such as copper alloys and superalloys. Therefore, during the printing process, it is necessary to reduce the speed for processing. The processing efficiency is significantly reduced
At the same time, the effective utilization rate of energy is also greatly reduced, and some reflected light of the unabsorbed light affects the optical path system, so long-term use of reflected light will reduce the service life of the optical path system

Method used

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  • Multi-wavelength laser processing light path system of melting additive manufacturing equipment

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Embodiment approach 1

[0016] Such as figure 1 As shown, it is the multi-wavelength laser processing optical path system and device for selective melting additive manufacturing equipment according to the embodiment of the present invention. The device includes a scanning galvanometer 1, a dynamic focusing mirror 2, a movable frequency conversion device 3, a collimator 4, optical lens 5, laser 6, control system 7.

[0017] In the embodiment of the present invention, the scanning vibrating mirror 1 can meet the frequency bands before and after frequency conversion at the same time, ensuring that energy can reach the forming area during the metal sintering forming process. The laser 6 is usually a fiber laser in additive manufacturing equipment with a center wavelength of 1064nm, which is used to provide energy for metal powder melting.

[0018] In the embodiment of the present invention, there are two dynamic focusing mirrors 2, which are respectively used for focusing the beams before and after freq...

Embodiment approach 2

[0025] Such as figure 2 As shown, it is the multi-wavelength laser processing optical path system and device for selective melting additive manufacturing equipment according to the embodiment of the present invention. The device includes scanning galvanometer 1, achromatic focusing mirror 2, movable frequency conversion device 3, quasi- Straightener 4, laser 5, control system 6.

[0026] In the embodiment of the present invention, the achromatic focusing lens 2 also needs to meet the requirements of focusing the wavelength bands before and after frequency conversion on the same working plane at the same time, so that the beams of the two wavelength bands at different positions in the shaping area are uniform.

[0027] In the embodiment of the present invention, the control system 6 is used to control the normal operation of the scanning vibrating mirror 1 and the laser 5; at the same time, the control system 6 also controls the movable frequency conversion device 3, when the ...

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Abstract

The invention provides a multi-wavelength laser processing light path system of melting additive manufacturing equipment. The system is suitable for the field of metal additive manufacturing. The light path system device comprises a laser (6), an optical lens (5), a collimator (4), a movable frequency conversion device (3), a focus lens (2) and a scanning galvanometer (1). According to the multi-wavelength laser processing light path system, the position and the angle of the movable frequency conversion device are controlled through a control system, thereby achieving switching processing among different wavelengths. A processing device can sinter and form different powder, and meanwhile, the energy absorption rate of different powder is effectively improved, so that the processing efficiency is improved.

Description

technical field [0001] The invention relates to the field of metal additive manufacturing, in particular to a multi-wavelength laser processing optical path system for selective melting additive manufacturing equipment. Background technique [0002] In the field of metal additive manufacturing, the center wavelength of lasers usually used is 1064nm, and the absorption rate of this wavelength band is much lower than 532nm during the sintering and forming process of powders such as copper alloys and superalloys. Therefore, during the printing process, it is necessary to reduce the speed for processing. The processing efficiency is significantly reduced. At the same time, the effective utilization rate of energy is also greatly reduced, and some reflected light of the unabsorbed light affects the optical system, so long-term use of reflected light will reduce the service life of the optical system. [0003] In order to effectively improve the energy absorption rate of differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y30/00
CPCB33Y30/00Y02P10/25
Inventor 王旭琴李鹏丘廉芳孙靖王飞柳玉文杨洋
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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