Metal dot matrix 3D printing system and method based on electromagnetic-thermocompression coupling adsorption

Abstract

The invention relates to a metal dot matrix 3D printing system and method based on electromagnetic-thermocompression coupling adsorption. The invention relates to the technical field of metal additive manufacturing, in particular to a 3D printing system integrating imprinting welding adsorption characteristics and hot-pressing deposition, and is suitable for high-precision scenes such as microelectronic devices and space on-orbit manufacturing. The technical problems that due to the fact that traditional metal 3D printing depends on gravity powder laying, the microstructure precision is low (gt; 100 microns), and the welding process and the printing process are separated are solved.

Description

Technical Field

[0001] The present invention belongs to the field of metal additive manufacturing technology, and specifically relates to a 3D printing system that integrates the adsorption characteristics of imprint welding and hot pressing deposition, which is suitable for high-precision scenarios such as microelectronic devices, in-orbit manufacturing in space, and biomedical implants. Background Art

[0002] 1. Deficiencies in existing technology - Limitations of gravity-based powder spreading: Traditional metal printing (such as SLM) relies on gravity-based powder spreading, which limits microstructure accuracy (>100μm); - Welding technology fragmentation: Existing welding-printing composite technology (such as Aero Engine CN202111535227.2) is only used for post-repair and does not achieve in-situ adsorption deposition; - Single adsorption application: Lianzan's laser negative pressure adsorption patent (CN202410489146.0) is only used for workpiece fixation and does not integrate energy field control.

[0003] 2. Technological gaps There are currently no patents involving the simultaneous control of electromagnetic adsorption and hot pressing deposition (search end June 2025). The Gangyan high-nano high-temperature alloy patent (CN202410780731.6) optimizes the material but does not solve the adsorption mechanism. Summary of the Invention

[0004] (1) Core innovations 1. Multi-physics coupling print head - Electromagnetic adsorption module: Radially distributed coils pass pulse current (0.1-5T), accurately adsorbing magnetic powder (such as Fe-Co-Ni alloy) with a positioning accuracy of ±5μm; - Hot pressing composite module: a transient current (100-500A) is passed through the resistance electrode to soften the material, and mechanical pressure (5-20MPa) is applied simultaneously to achieve atomic diffusion bonding.

[0005] 2. Intelligent closed-loop system - Integrated vertical cubic Z-axis zeroing algorithm (CN119610678A) to compensate for thermal deformation; - Integrates Weijing's intelligent 3D visual tracking technology to calibrate the printing path in real time.

[0006] (2) Material innovation - Matrix material: Kingfa PBT composite material (CN202410530186.5) to enhance interlayer toughness; - Magnetic powder: Gradient Fe-Co-Ni alloy (cited from Gangyan Gaona patent), with 40% increase in resistance to oxygen-rich ablation. DETAILED DESCRIPTION Example 1: 50 μm microcircuit printing 1. Parameters: - Electromagnetic field strength: 1.2T (pulse frequency 200Hz); - Hot pressing temperature: 380℃ (copper alloy), pressure: 15MPa.

[0007] 2. Effect: - The wire width is reduced to 50μm (the traditional SLM limit is 100μm), and the conductivity is increased by 22%.

[0008] Example 2: Space titanium alloy repair 1. Inert gas protection: using Chuangxiang three-dimensional sealing module (CN222610457U); 2. Zero-gravity adaptation: Adsorption force replaces gravity to successfully print satellite brackets (strength ≥ 850MPa).

Claims

1. A point adsorption 3D printing system, characterized in that Include: - Electromagnetic adsorption print head, hot pressing composite deposition module, and multi-physics closed-loop controller.

2. A system as described in claim 1, wherein the electromagnetic coils are radially distributed and the magnetic field gradient is adjustable.

3. As in the system described in right 1, a strong new material light-curing composition (CN202211608271.6) is used to coat the powder to improve leveling.