Near-net forming method and device for composite manufacturing fine workpiece based on laser additive manufacturing and subtractive manufacturing

A laser additive and near-net forming technology, which is applied in the direction of additive processing, additive manufacturing, and process efficiency improvement, can solve the problems of low molding precision, high roughness, and insufficient fineness, so as to improve the smoothness and dimensional accuracy, Effect of improving forming accuracy and surface quality

Pending Publication Date: 2019-10-25
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a near-net-shaping method and device for manufacturing fine workpieces based on laser additive and subtractive materials, organic fusion of laser selective melting technology and ultrafast laser material reduction technology, and layer-by-layer material addition in the laser powder bed During the manufacturing process, the ultrafast pulsed laser is alternately used to reduce the edge profile of the formed workpiece sheet and other selected areas, and form a complex and fine structure after layer-by-layer stacking, while improving the surface finish and dimensional accuracy of the workpiece. Overcome the technical problems of low molding precision, high roughness and insufficient fineness of laser additive manufacturing technology

Method used

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  • Near-net forming method and device for composite manufacturing fine workpiece based on laser additive manufacturing and subtractive manufacturing
  • Near-net forming method and device for composite manufacturing fine workpiece based on laser additive manufacturing and subtractive manufacturing
  • Near-net forming method and device for composite manufacturing fine workpiece based on laser additive manufacturing and subtractive manufacturing

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Embodiment 1

[0044] The following combination figure 2 with image 3 The present invention will be described in detail by taking the near-net forming of 316 stainless steel capillary tube based on laser selective melting additive manufacturing as an example. The selected 316 stainless steel powder is nearly spherical powder with a particle size of 15-53μm.

[0045] image 3 The device that implements the near-net shaping method of complex and fine workpieces based on laser adding and reducing materials, mainly includes a computer control device 11, a sealed molding chamber 2, an optical path selection system 3, and an inert protective gas source 1. Among them, the optical path selection system 3 includes an increase Material laser mirror 301, additive laser beam expander 302, additive laser 303, scanning galvanometer 304, subtractive laser beam expander 305, and subtractive laser 306; the additive laser 303 and scanning oscillator in the optical path selection system 3 The mirror 304 and the...

Embodiment 2

[0056] The following combination figure 2 with Figure 4 Take the 316 stainless steel capillary tube based on laser selective melting additive manufacturing as an example to illustrate the present invention in detail. The selected 316 stainless steel powder is a nearly spherical powder with a particle size of 15-53μm.

[0057] Figure 4 The device that implements the near-net shaping method of complex and fine workpieces based on laser adding and reducing materials, mainly includes a computer control device 11, a sealed molding chamber 2, an optical path selection system 3, and an inert protective gas source 1. Among them, the optical path selection system 3 includes an increase The material laser 303 and the additive laser emitting end 307 connected thereto, the subtractive laser 306 and the subtractive laser emitting end 308 connected thereto, the additive laser emitting end 307 and the subtractive laser emitting end 308 are fixed in the sealed molding chamber 2 On the guide...

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Abstract

The invention belongs to the field of laser processing, and relates to a near-net forming method and device for composite manufacturing a fine workpiece based on laser additive manufacturing and subtractive manufacturing. According to the method, the construction parameters of a three-dimensional digital-to-layer slicing layer are generated by utilizing software, laser additive manufacturing processing is carried out, and ultrafast pulse laser subtractive manufacturing processing is carried out alternately in the laser additive manufacturing processing process to form a three-dimensional entity. The device comprises a computer control device, a sealing molding chamber, a light path selecting system and an inert protection gas source; during additive manufacturing processing, the computer control device controls the light path selecting system to select the laser emitted by an additive manufacturing laser device and perform laser additive manufacturing processing; and during subtractivemanufacturing processing, the computer control device controls the light path selecting system to select ultrafast pulse lasers emitted by a subtractive manufacturing laser device and perform the ultrafast pulse laser subtractive manufacturing processing. According to the near-net forming method and device, the preparation of complex and fine-structure parts can be completed in a high-precision and integrated manner, the defects that traditional laser additive manufacturing is low in the forming precision, high in roughness and cannot be used for preparing a fine and complex inner cavity areovercome.

Description

Technical field [0001] The invention belongs to the field of laser processing, and in particular relates to a near-net shaping method and device for manufacturing fine workpieces based on laser adding and reducing materials. Background technique [0002] Laser additive manufacturing is a technology for manufacturing solid parts based on the discrete-gradual accumulation method of materials. It can realize rapid and moldless near-net forming of dense materials with complex structures, providing a new way for the integrated preparation of complex and fine-structured parts. The idea, especially for the forming of key precision parts in the fields of aerospace, medical equipment, precision machine tools, electronic communications and other fields, provides a simple, fast, low-cost, green flexible manufacturing technology from powder to complete parts, which has a beautiful Prospects. [0003] At present, laser additive manufacturing technology is mainly divided into: Selective Laser M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y30/00
CPCB33Y10/00B33Y30/00B22F10/00B22F12/49B22F10/28B22F10/36B22F10/32Y02P10/25
Inventor 何博高双兰亮
Owner SHANGHAI UNIV OF ENG SCI
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