Additive and subtractive composite 3D printing equipment and method based on (cold metal transfer) CMT welding and multi-axis numerical control machine tool

Abstract

The invention discloses additive and subtractive composite 3D printing equipment and method based on cold metal transfer (CMT) welding and a multi-axis numerical control machine tool. The equipment is composed of a forming equipment driving mechanism, a metal wire feeding mechanism, a water cooling machine, a high-pressure Ar protection gas cylinder, a central control system, a tool changer, a cooling liquid system and the like. The forming equipment driving mechanism comprises Z-direction moving guide rails, a milling mechanical arm used for loading a milling cutter, a welding mechanical arm used for loading a cold metal welding gun, a Y-direction controller, Y-direction moving guide rails arranged on guide rail supporting racks, an X-direction moving guide rail, an X-direction controller and a Z-direction controller. A positioner is arranged on a 3D printer base. Additive manufacturing is achieved by adoption of the cold metal welding gun of the equipment, and the part production efficiency is improved compared with a 3D printer with laser as the heat source; and meanwhile, the milling cutter is adopted for milling a welding machined surface, and the part surface quality is greatly improved.

Description

technical field [0001] The invention relates to 3D printing technology, in particular to a 3D printing equipment and method for adding and subtracting material composites of CMT and multi-axis numerical control machine tools. Background technique [0002] Cold Metal Transition Welding Technology (CMT) is a new type of welding technology without welding slag spatter. The so-called cold metal transition refers to the monitoring of the short arc and the reversing wire feeding of the welding wire under the digital control mode. This equipment greatly improves the welding production capacity and can effectively guarantee the welding quality of the welded parts. However, for some parts with complex shapes and high surface precision requirements, simple cold metal transition welding is difficult to achieve. Therefore, it is necessary to add another device to ensure the quality of the workpiece surface. [0003] Since Fronius proposed the cold metal transition in 2004, after more...

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Problems solved by technology

The invention overcomes the problems of low printing precision, low production efficiency, and small printing size in traditional printing, and at the same time minimizes the existence of supporting structures

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