Electric arc additive and milling composite machining method and product thereof

Abstract

The invention discloses an electric arc additive and milling composite machining method. The electric arc additive and milling composite machining method comprises the following steps: (1) carrying out hierarchical slicing and route planning on an STL three-dimensional model of a part needing to be machined to generate a corresponding G code, and then importing the G code to an electric arc additive and milling machining composite device and machining; (2) carrying out electric arc additive manufacturing through control on on-off of a welding gun, on-off of argon gas and movement of the composite device; (3) suspending the electric arc additive machining, controlling the welding gun to be lifted higher relative to a milling cutter through the G code, moving formed parts to a space below the milling cutter and carrying out milling machining on an outline and a top surface while using the welding gun for accumulating to achieve a threshold value needed for the milling machining; and (4) concluding the machining to obtain the machined parts if the machining meets conclusion conditions; or else, turning to the step (2), and cyclically executing. The invention further discloses a corresponding product. The electric arc additive and milling composite machining method and the product, which are disclosed by the invention, enable the electric arc additive and milling composite machining to be effectively fused, and have high machining efficiency; and the accuracy and morphology dimensions of the machined parts are controlled better.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, and more specifically relates to a compound processing method of arc additive and milling and its products. Background technique [0002] Arc additive manufacturing technology is a process (Wire Arc Additive Manufacturing, WAAM) of 3D forming of metal parts using arc fuse technology, that is, using argon arc welding arc as a heat source, melting metal wires and depositing them layer by layer to produce close-to-products Design the three-dimensional metal blank required by the size. Compared with other metal additive manufacturing technologies, arc additive manufacturing technology has the advantages of less investment in equipment, high manufacturing efficiency, stable operation of equipment, and low operating costs (the electric-arc conversion rate is more than 85%, and for lasers, the electric-optical conversion Rate is less than 10%) and other advantages. However, arc addi...

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Problems solved by technology

[0004] However, although the plan discloses the intervention of milling to improve the precision control of the shape and size, because the two processes of arc additive manufacturing and milling are independent of each other, when milling is involved in the arc additive process and how to intervene Among them, how to combine and cooperate with each other to process and coordinate and control them is the key to the combined processing of electric arc material addition and milling, and is the core means to improve the machining accuracy of the workpiece and obtain accurate shape and size. It is not mentioned in the above, so there are still some deficiencies in the precision of processing parts and the control of shape and size

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