在一年前首次亮相后，格勞博于2023年的in-house 展會上再次展示了液態金屬打印系統GMP300，這是一臺具有改進性能的用于生產增材制造領域近凈形工件的制造系統，為用戶提供廣泛優化的選擇。

為適應市場對定制化和近凈成形部件的要求，格勞博開發了液態金屬印刷（LMP），這是一種面向未來、經濟合理、同時具有靈活性的增材制造工藝，消除了傳統增材制造在金屬加工領域的缺點。在去年的in-house 展會上，格勞博首次展示了GMP300——一種可靠、高效、成本低廉的液態金屬打印系統，具有很大的生產靈活性，適用于單件和小批量生產。

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“GMP”是格勞博金屬印刷 (GROB Metal Printing)的縮寫，而“300”則代表了工作區域的大小即300 x 300 x 300 mm3。GMP300配備了3軸運動學，最大軸速為30 米/分鐘。帶有屏蔽氣體的減氧氣氛保護部件不被氧化，保證了一貫優良的材料質量。

格勞博液態金屬打印系統GMP300

GMP300：改進體現在細節方面

近幾個月來，GMP300在成功推出的同時，也得到了進一步的發展，在今年的格勞博in-house 展會上展示了其創新成果。

通過進一步開發的保護氣體理念和改進后的密封性，安裝空間中的殘余氧氣含量可以進一步降低到低ppm含量；同時格勞博在材料方面也取得了進展，因此現在可以加工更多的鋁合金；在鋁鎂合金的液滴生成方面我們也取得了長足的進步，這在以前是難以加工的。所以，格勞博成功地掃除了生產含鎂鋁部件的第一個障礙。除了識別和探究新材料外，我們正在進行各種試驗，作為確定的測試過程的一部分，以鑒定已經可以印刷的材料。其目的是確定和量化用該工藝生產的部件特定材料特性。

格勞博還能夠在工藝開發領域實現進一步的優化。在附加傳感器的幫助下，現在可以在印刷過程中就地檢測液滴大小、液滴速度和工件高度，并對工件生產進行糾正性干預。這些額外的質量保證步驟大大改善了工件質量和工藝穩定性。

格勞博液態金屬打印系統GMP300

過程優勢：引起用戶高度關注

自去年正式向市場和用戶推出格勞博液態金屬打印系統GMP300以來，我們與感興趣的合作伙伴進行了多次討論，并制造了許多單獨的用戶工件，以向用戶證明該技術的優勢和特性。格勞博的AM團隊在分析工件和重新設計工件方面都為這些公司提供了支持，以便利用LMP工藝對其進行優化生產。除了首件樣品的生產，格勞博還提供首批小批量樣件生產，作為印刷服務的一部分。

格勞博液態金屬打印系統GMP300加工的工件

在討論中，用戶對LMP程序的眾多優勢評價很高。與已知的粉床熔接工藝相比，格勞博開發的LMP工藝的原材料是線材。這不僅降低了材料成本，而且消除了健康和爆炸危險，免除了額外的工作步驟，如部件脫粉和粉末的篩分和加工。另外，LMP工藝是一種微鑄造工藝，而不是焊接工藝，幾乎沒有熱變形。這允許對不可焊接的合金進行加工。LMP工藝產生了均勻的微觀結構，其屈服強度等于或有時大于原材料的值。除此以外，該工藝還提供了令人印象深刻的高靈活性和生產率。靈活性是通過快速更換材料的能力來實現的，不需要過多的清潔工作，通過高度可變的液滴直徑和坩堝更換器，可以快速更換打印頭和噴嘴。LMP工藝的高生產率主要是通過高建立率、減少后處理工作以及組件成本僅略高于建筑基座的填充水平來實現的。

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.

格勞博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.