Additive manufacturing and subtractive manufacturing composite machining equipment

Abstract

The invention discloses additive manufacturing and subtractive manufacturing composite machining equipment. The equipment comprises a sealing chamber, an additive manufacturing device and a subtractive manufacturing device, wherein the additive manufacturing device and the subtractive manufacturing device are jointly arranged in the sealing chamber; the additive manufacturing device comprises an upper powder feeding mechanism, a powder spreading mechanism, a powder spreading mechanism driving module, a laser device, a laser device lifting mechanism and a forming bin, the upper powder feeding mechanism is used for quantitatively feeding powder to the powder spreading mechanism, the powder spreading mechanism is used for uniformly spreading the powder on a forming base plate in the forming bin, the laser lifting mechanism is used for adjusting the height position of the laser device, and the laser device is used for carrying out sintering and printing on the uniformly-spread powder; thesubtractive device comprises a CNC main shaft capable of carryingout three-axis movement, a tool magazine and a tool measuring device, the CNC main shaft is used for taking a tool from the tool magazine under the control of a control system, and the contour of a printed model is subjected to subtractive machining through the CNC main shaft after the tool is measured by the tool measuring device. According to the equipment, internal subtractive machining of a complex model can be completed, laser printing precision can be effectively improved, the stability of printing and CNC machining is good, and the machining quality is high.

Description

technical field [0001] The invention relates to the technical field of metal 3D printing, in particular to a compound processing equipment for adding and subtracting materials. Background technique [0002] Metal 3D printing technology is a technology different from traditional subtractive manufacturing. Metal 3D printing technology is additive manufacturing. It is a manufacturing process that starts from scratch and is formed by material accumulation. First, use CAD to build a model, and then carry out layer accumulation. Manufacturing can complete the manufacture of some workpieces with complex shapes and internal structures, and has the advantages of low cost, diverse structures, and unlimited combinations of materials. However, there are still some defects in the existing metal 3D printing. The surface of the printed model is relatively rough, and the remaining machining allowance needs to be used in the later subtractive processing, and some parts with complex internal ...

AI Technical Summary

Problems solved by technology

However, there are still some defects in the existing metal 3D printing. The surface of the printed model is relatively rough, and the remaining machining allowance needs to be used in the later subtractive processing, and some parts with complex internal structures are difficult to carry out later subtractive processing ( For example, the cooling water channel inside the model), it is difficult to meet the production needs; the laser printing accuracy of the existing metal 3D printing equipment cannot be effectively controlled due to the large focal length; the existing metal 3D printing equipment adopts left and right ventilation methods, such ventilation The distance is long, the internal air circulation is disordered, and the smoke and metal condensation produced by printing will spread everywhere, thus affecting the service life and working environment of other components; the existing metal 3D printing equipment uses a metal base, and the laser generates heat during the printing process Large, easy to cause thermal deformation of the base; the existing metal 3D printing equipment adopts the method of directly rushing into the inert gas to ensure the gas environment, so that the required speed is slow and the air is not exhausted completely; the existing metal 3D printing equipment adopts the bare Or a certain degree of dust-proof linear guide, which still cannot prevent metal powder from entering the guide rail, which will cause wear of the guide rail and reduce the service life

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