在一年前首次亮相后，格劳博于2023年的in-house 展会上再次展示了液态金属打印系统GMP300，这是一台具有改进性能的用于生产增材制造领域近净形工件的制造系统，为用户提供广泛优化的选择。
为适应市场对定制化和近净成形部件的要求，格劳博开发了液态金属印刷（LMP），这是一种面向未来、经济合理、同时具有灵活性的增材制造工艺，消除了传统增材制造在金属加工领域的缺点。在去年的in-house 展会上，格劳博首次展示了GMP300——一种可靠、高效、成本低廉的液态金属打印系统，具有很大的生产灵活性，适用于单件和小批量生产。
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“GMP”是格劳博金属印刷 (GROB Metal Printing)的缩写，而“300”则代表了工作区域的大小即300 x 300 x 300 mm³。GMP300配备了3轴运动学，最大轴速为30 米/分钟。带有屏蔽气体的减氧气氛保护部件不被氧化，保证了一贯优良的材料质量。
格劳博液态金属打印系统GMP300
GMP300：改进体现在细节方面
近几个月来，GMP300在成功推出的同时，也得到了进一步的发展，在今年的格劳博in-house 展会上展示了其创新成果。
通过进一步开发的保护气体理念和改进后的密封性，安装空间中的残余氧气含量可以进一步降低到低ppm含量；同时格劳博在材料方面也取得了进展，因此现在可以加工更多的铝合金；在铝镁合金的液滴生成方面我们也取得了长足的进步，这在以前是难以加工的。所以，格劳博成功地扫除了生产含镁铝部件的第一个障碍。除了识别和探究新材料外，我们正在进行各种试验，作为确定的测试过程的一部分，以鉴定已经可以印刷的材料。其目的是确定和量化用该工艺生产的部件特定材料特性。
格劳博还能够在工艺开发领域实现进一步的优化。在附加传感器的帮助下，现在可以在印刷过程中就地检测液滴大小、液滴速度和工件高度，并对工件生产进行纠正性干预。这些额外的质量保证步骤大大改善了工件质量和工艺稳定性。
格劳博液态金属打印系统GMP300
过程优势：引起用户高度关注
自去年正式向市场和用户推出格劳博液态金属打印系统GMP300以来，我们与感兴趣的合作伙伴进行了多次讨论，并制造了许多单独的用户工件，以向用户证明该技术的优势和特性。格劳博的AM团队在分析工件和重新设计工件方面都为这些公司提供了支持，以便利用LMP工艺对其进行优化生产。除了首件样品的生产，格劳博还提供首批小批量样件生产，作为印刷服务的一部分。
格劳博液态金属打印系统GMP300加工的工件
在讨论中，用户对LMP程序的众多优势评价很高。与已知的粉床熔接工艺相比，格劳博开发的LMP工艺的原材料是线材。这不仅降低了材料成本，而且消除了健康和爆炸危险，免除了额外的工作步骤，如部件脱粉和粉末的筛分和加工。另外，LMP工艺是一种微铸造工艺，而不是焊接工艺，几乎没有热变形。这允许对不可焊接的合金进行加工。LMP工艺产生了均匀的微观结构，其屈服强度等于或有时大于原材料的值。除此以外，该工艺还提供了令人印象深刻的高灵活性和生产率。灵活性是通过快速更换材料的能力来实现的，不需要过多的清洁工作，通过高度可变的液滴直径和坩埚更换器，可以快速更换打印头和喷嘴。LMP工艺的高生产率主要是通过高建立率、减少后处理工作以及组件成本仅略高于建筑基座的填充水平来实现的。
English Edition
GROB in-house exhibition
GMP300 – GROB’s Machine for Additive Manufacturing
After its premiere a year ago, GROB will present the GMP300 at the 2023 In-House Exhibition, a manufacturing system for the production of near-net-shape components in the field of additive manufacturing with improved properties, offering its customers a modified machine variant.
格劳博GROB
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GROB Liquid Metal Printing System GMP300
To suit the market requirements for customized and near-net-shape components, Liquid Metal Printing (LMP) was developed at GROB for a future-oriented, economically sound and at the same time flexible additive manufacturing process that eliminates the disadvantages of traditional additive manufacturing in the metalworking sector. At last year’s In-House Exhibition, GROB presented the GMP300 for the first time – a reliable, efficient and cost-conscious system technology with maximum production flexibility for individual and small-series production.
GMP stands for GROB Metal Printing, and 300 for the size of the work area, 300 x 300 x 300 mm³. The GMP300 is equipped with 3-axis kinematics and maximum axis speed of 30 m/min. The oxygen-reduced atmosphere with shielding gas protects the component from oxidation, guaranteeing consistently good material quality.
GROB Liquid Metal Printing System GMP300
Improvements of the GMP300 Are in the Details
In recent months, the GMP300 has been continuously developed further parallel to its successful launch, and will now be presented with innovations at this year's in-house exhibition.
With a further developed protective gas concept and improved sealing, the residual oxygen content in the installation space can be further reduced to a low ppm content. Progress has also been made in materials, so that additional aluminum alloys can now be processed. Successful progress was also made in droplet generation with aluminum-magnesium alloys, which had been difficult to process. This way we successfully cleared the first hurdle to the production of magnesium-containing aluminum components. In addition to the identification and investigation of new materials, we are carrying out various trials to qualify already printable materials as part of a defined testing process. The goal is to identify and quantify the material-specific properties of the parts produced with the process.
