A method and device for refining grains in additive manufacturing
A technology of additive manufacturing and grain refinement, applied in the field of additive manufacturing/welding, which can solve problems such as difficult to achieve stable and reliable performance, low surface quality, long manufacturing process, etc., to reduce the tendency of dendrites/branches , stable performance, high efficiency, and low-cost additive manufacturing effect
Active Publication Date: 2020-01-14
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology
[0007] Aiming at technical problems such as long traditional manufacturing process of high-performance, melting and additively formed metal components, high energy consumption, difficulty in stably and reliably reaching the level of forgings, and low surface quality of additive manufacturing technology. , the present invention proposes a method and device for refining grains in additive manufacturing, in which the semi-solid blank in the additive manufacturing process is melted, and a new process method of side conformal flexible constraint and synchronous stirring composite manufacturing is adopted
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Embodiment 1
[0028] A method for refining crystal grains in additive manufacturing. In the process of melting additive manufacturing, the method of stirring semi-solid blanks with shoulder-constrained stirring pins 14 breaks dendrites, increases the nucleation rate, increases the crystallization rate, and refines the crystal grains. Particles, synchronously combined with side conformal constraints on both sides to restrain the billet, prevent the billet from flowing away from the digital model during the mixing process, and the side conformal restraint and stirring movement advance synchronously with the additive manufacturing movement.
[0029] Through the method of stirring the semi-solid billet with the shaft shoulder constraining the stirring pin 14 in the process of melting the additive manufacturing process, the synchronous high-efficiency and high-precision additive manufacturing is realized; the purpose is to improve the forming accuracy and material utilization rate of the additive ...
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Abstract
The invention relates to a method and device for refining crystal particles in additive manufacturing. According to the method, in the fusion additive manufacturing process, a semisolid formed blank stirring method is adopted, dendrites / branch crystals are smashed under stirring, the nucleation rate is increased, the crystallization rate is increased, the crystal particles are refined, two-side-face and vertical-direction shaft shoulder shape follow-up restraint modes are synchronously combined to restrain a blank, the problem that in the stirring process, the blank flows and deviates from thedigital-analog or forming is discontinuous due to stirring is prevented, and side-face shape follow-up restraint and stirring movement are both synchronously conducted along with additive manufacturing movement. Stable-property, efficient, high-precision and low-cost additive manufacturing of complex parts made of materials difficult to form can be achieved.
Description
technical field [0001] The invention relates to a method and a device for refining crystal grains in additive manufacturing, and belongs to the technical field of additive manufacturing / welding. Background technique [0002] The design and manufacturing concepts of aerospace components tend to be lighter in weight, longer in life and lower in cost. The traditional manufacturing of parts and components mainly relies on traditional casting, forging, and welding methods to complete, which makes the product difficult to reduce weight, long cycle, high cost and other contradictions that are contrary to the design concept and cost budget, so it is urgent to develop Research on efficient design and manufacturing methods of alloys and equipment manufacturing technologies that take into account multiple constraints such as weight, life, cost, cycle, materials, and processes. [0003] Due to the high production efficiency of the current plasma arc / arc fuse additive manufacturing and ...
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IPC IPC(8): B23K37/00B23K10/02B23K9/04B23K15/00B33Y10/00B33Y30/00
CPCB23K9/04B23K10/027B23K15/0086B23K37/00B33Y10/00B33Y30/00
Inventor 单飞虎巩水利张升刘琦
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST