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Selective-laser-melting two-dimensional ultrasonic vibration introducing device

A technology of laser selective melting and ultrasonic vibration, which is applied in the directions of additive manufacturing, additive processing, and process efficiency improvement.

Inactive Publication Date: 2016-07-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practice, it is found that such methods still have two limitations. One: these two treatments are post-processing, and they cannot solve the influence of warping deformation caused by residual stress on part processing during processing; Larger size parts are more restrictive

Method used

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  • Selective-laser-melting two-dimensional ultrasonic vibration introducing device
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  • Selective-laser-melting two-dimensional ultrasonic vibration introducing device

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] refer to figure 1 , figure 2 , image 3 , a laser selective melting two-dimensional ultrasonic vibrating device, including a support box 1, the inside of the support box 1 is respectively connected to an ultrasonic transducer fixing base 3 in the X and Y directions, and the ultrasonic transducer fixing base 3 The ultrasonic transducer 4 is fixed on the top, and the ultrasonic transducer 4 is connected to the connecting shaft 6 through the horn 5. The connecting shaft 6 is rigidly connected to the connecting block 7, and the connecting block 7 is screwed to the corresponding side of the counterweight 10. , the counterweight 10 is connected with the lower surface of the ultrasonic vibration platform 8 by screws, a square ring-shaped first support boss 2 is provided inside the support box 1, and square rings are provided on the edges around the lower surface of ...

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Abstract

The invention discloses a selective-laser-melting two-dimensional ultrasonic vibration introducing device.The selective-laser-melting two-dimensional ultrasonic vibration introducing device comprises a supporting box.Ultrasonic transducer fixing bases where ultrasonic transducers are fixed respectively are connected inside the supporting box in the X direction and the Y direction respectively, the ultrasonic transducers are connected through amplitude-change rods and connecting shafts, the connecting shafts are rigidly connected to connecting blocks, the connecting blocks are connected with a balance weight, the balance weight is connected with the lower surface of an ultrasonic vibrating platform, a first supporting boss is arranged inside the supporting box, a second supporting boss is arranged at the edge of the periphery of the lower surface of the ultrasonic vibrating platform and is in planar contact with the first supporting boss to form an integrated box structure, the upper surface of the ultrasonic vibrating platform is connected with a base plate of a selective-laser-melting device, and the ultrasonic transducers are connected with an external ultrasonic generator and a controller.By means of the selective-laser-melting two-dimensional ultrasonic vibration introducing device, vibration of the selective-laser-melting device in the two-dimensional directions is achieved, residual stress generated in the machining process of SLM metal parts is eliminated in real time, crystal grains can be refined, and the structure can be homogenized.

Description

technical field [0001] The invention belongs to the technical field of laser selective melting in additive manufacturing, and in particular relates to a two-dimensional ultrasonic vibration device for laser selective melting. Background technique [0002] Selective laser melting (SLM) is one of the research hotspots in the field of additive manufacturing technology. In metal forming by laser selective melting, due to the extremely high energy density of the laser, the metal powder undergoes a process of rapid heating, melting and sudden cooling during processing. The data show that the cooling rate of the molten metal pool can reach 10 5 K / s, this extremely high cooling rate is the main factor leading to the presence of large residual stresses in metal parts. The principle is mainly in two aspects. First: during the solidification process of the molten metal pool, the excessively high cooling rate causes the cooling rate of each area of ​​the molten metal pool to be inconsi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y30/00
CPCB33Y30/00B22F2999/00B22F10/00B22F12/30B22F10/28B22F2202/01Y02P10/25
Inventor 李涤尘杨东曹毅王成李玉哲张旺
Owner XI AN JIAOTONG UNIV
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