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Additive manufacturing apparatus and method

A technology of additive manufacturing and equipment, applied in the field of additive manufacturing equipment, can solve problems such as partial formation defects of evaporated materials

Inactive Publication Date: 2017-08-01
RENISHAW PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, during part formation, defects may form in portions of the solidified evaporated material at undesired locations on the powder bed

Method used

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  • Additive manufacturing apparatus and method
  • Additive manufacturing apparatus and method
  • Additive manufacturing apparatus and method

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Experimental program
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Embodiment Construction

[0047] refer to Figure 1 to Figure 3 , the laser curing apparatus according to an embodiment of the present invention comprises a main chamber 101 in which there are partition walls 115, 116 defining a build chamber 117 and a surface 110 onto which powder is deposited. A build platform 102 is provided for supporting a powder bed 104 and an article / articles 103 built from selective laser melting powder 104 . Platform 102 may be lowered within build chamber 117 as successive layers of object 103 are formed. The available build volume is defined by the extent to which build platform 102 can be lowered into build chamber 117 .

[0048] The build-up is performed by sequentially depositing powder layers on the powder bed 104 using a dispersing device 108 for quantitatively placing the powder on the surface 110 and an elongated wiper 109 for dispersing the powder on the bed 104 . For example, the dispersion device 108 may be a device as described in WO2010 / 007396. The wiper 109 m...

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Abstract

The invention concerns an additive manufacturing apparatus comprising a build chamber (101) containing a support (102) for supporting a material bed (104), a layering device (108, 109) for forming layers of the material bed (104), a laser or electron beam source (105) for generating a laser or electron beam (118), a device (106) for steering the laser or electron beam (118) to solidify selected areas of each layer to form a part and a microwave or radio wave source (111, 112, 113, 114) controllable to generate a microwave or radio wave field to differentially heat the material bed (104) based upon the selected areas.

Description

technical field [0001] The present invention relates to additive manufacturing apparatus and methods. The invention has particular, but not exclusive application to selective laser melting (SLM) or selective laser sintering (SLS) systems in which a powder bed is preheated prior to its selective melting or sintering. Background technique [0002] Selective laser melting (SLM) and selective laser sintering (SLS) equipment produce objects by layer-wise solidification of materials, such as metal powder materials, using a high energy beam, such as a laser beam. The powder bed is formed on the powder bed in the build chamber by depositing a pile of powder near the powder bed and spreading the powder with a wiper between the powder bed (from one side of the powder bed to the other), Thus forming layers. The laser beam is then scanned over an area of ​​the powder bed corresponding to the cross-section of the object being constructed. The laser beam melts or sinters the powder to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/153B29C64/20B29C64/264B33Y30/00
CPCB33Y30/00B22F12/44B22F10/36B22F10/28B22F12/41B22F10/362B22F2999/00B22F2203/11B22F2003/1054B29C64/153B29C64/268B29C64/295Y02P10/25B33Y10/00B33Y50/02B23K26/342
Inventor 艾德里安·波尔基杰弗里·麦克法兰
Owner RENISHAW PLC