The objective of this work is to predict a type of thermal-induced process failure called recoater crash that occurs frequently during laser powder bed fusion
as the recoating speed and the recoater blade material were shown to also influence the spread quality. Previous article in issue Next article in issue Keywords Additive manufacturing Powder bed fusion Feedstock
Abstract Especially in the Laser Powder Bed Fusion (L-PBF) technology for metals, current manufacturing systems require the use of support structure to withstand recoater forces and lower thermal induced stresses. These support structures set limitations on the design freedom and affect the surface quality, part cost and lead-time in an
Powder bed fusion (PBF) is a 3D printing method that joins powdered material point by point using an energy source, typically a laser beam or an electron beam. Powder bed fusion is one of the most
Recoater collision prediction and correction method for additive manufacturing and system thereof Wai-Kwuen Choong, Tainan (TW); Kai-Yuan Teng, Chiayi County (TW); Ching-Chih Lin, Tainan (TW); I-Chun Lai, Tainan (TW); Tsung-Wen Tsai, New Taipei (TW
a mounting apparatus for a recoater rail of an additive manufacturing machine includes: a bracket including: a body having first and second ends; first and second flanges extending from the first and second ends respectively, the body and flanges cooperatively forming a C-shape; a first jack screw mounted to the first flange, the first jack screw extending parallel
During a laser powder bed fusion (LPBF) additive manufacturing process, powders are spread over a substrate into a thin powder layer, which is then selectively melted by a laser according to a computer aided design (CAD) model. 1–3 The characterization of the powder behavior during the spreading process is important for
The powder additive manufacturing apparatus 1 includes, as its main components, a recoater 10, a main-body block 20, a powder supply apparatus 30, and a laser oscillation device 40. Note that in FIG.
Multi-material sintering. The Aerosint die filling machine allows to stack up to 3 powders precisely in a mold with an internal diameter of up to 100 mm. This binder-free technique enables the combination of multiple materials into a multi-material blank or near net shape. The process is compatible with metals and ceramics.
and a hard recoater blade (Wohlfart, 2020). Other tests conducted by EOS include the manufacture of 100 mm discs of the titanium alloy Ti6Al4V also on the M290 with a hard recoater blade. The outline of the discs was supported by a 1 mm contour support
Abstract. The flowability and spreadability of three different polymer powders for selective laser sintering were investigated by analysing the powder at different temperatures. These measurements were performed using both the Revolution Powder Analyzer and the Schulze Ring Shear Tester. The latter device was modified with a self
While the engineering company found its roots in metrology, its orange and black display in Frankfurt is very much all about its RenAM 500 metal additive manufacturing family. The RenAM 500Q Ultra is the latest edition, a four-laser machine which comes equipped with TEMPUS technology as standard, though existing RenAM
In Powder Bed Additive Manufacturing processes, alternatively termed Powder Bed Fusion (PBF) processes, a 3-dimensional part is built sequentially, layer after layer. First, a thin layer of powder is applied onto the top surface of a downwards moving fabrication piston. The thickness of this layer typically varies between 30 and 150 μm.
The objective of this work is to predict a type of thermal-induced process failure called recoater crash that occurs frequently during laser powder bed fusion (LPBF) additive manufacturing.
The quality of the part developed with Additive Manufacturing (AM) is in direct relation with the powder flowing properties. The flowability should be adequately good to achieve homogeneous successive powder layers.
In metal additive manufacturing (AM), powder bed fusion technologies such as selective laser melting and binder jetting rely on the spreading of fine metal powder to build up the layers of a part. This work studies the complex interaction between metal powder particles and the recoater.
TEMPUS technology optimizes additive manufacturing by allowing the laser to fire during recoater movement, saving up to nine seconds per layer. Synchronized with the recoater, lasers track its
Additive manufacturing (AM) has been traditionally used for prototyping in various industries but has more recently been adopted for manufacturing production parts. Increasing adoption of this technology has opened up potential applications for production in various industries such as aerospace, medical, tooling, and oil and gas, to
the recoater collision prediction and calibration method for additive manufacturing in the disclosure includes the following steps: loading a printing image file to generate a simulated printing object according to the printing image file; performing a process thermal stress simulation on the simulated printing object to obtain a plurality of simulated deformation
We present a new framework for learning novel operational strategies and dynamically controlling the layering process in metal additive manufacturing. Metal additive manufacturing technologies such as powder bed fusion (PBF) are generally
Investigation of the fluid flow during the recoating process in additive manufacturing - Author: Andrei Kozhevnikov, Rudie P.J. Kunnen, Gregor E. van Baars, Herman J.H. Clercx This paper aims to explore the fluid flow in the stereolithography process during the recoating step.
Progress in Additive Manufacturing - In powder bed fusion of metal with laser beam (PBF-LB/M), repetitive melting and solidification of newly added layers lead
When it comes to different options of recoating blades, there has always been a debate in the Additive Manufacturing (AM) community whether to use a soft or a hard recoating solution. Here, I want to give an overview of different use cases and the advantages as well as disadvantages of soft and hard recoating.
Over the cycle time of the build, the time saving can cut the build time by up to 50%. Crucially, there is no reduction in part quality. With TEMPUS technology, as the recoater spreads a layer of powder, the lasers "follow" the recoater, melting the powder being spread before the recoater completes its stroke. When the recoater goes back to
Velo3D''s contact-free recoater process helps free engineers from the constraints of conventional LPBF rules by allowing them to evade traditional AM design limitations. These limitations hinder innovation through restrictive design for additive manufacturing (DfAM) rules, which prioritize manufacturability over optimization.
Additive manufacturing (AM) has the potential to revolutionize the way products are designed and produced in a wide range of industries. However, ensuring the quality and reliability of AM parts remains a challenge, as defects can occur during the building process.
Keywords Additive manufacturing ·In-situ monitoring ·Recoater-based imaging sensor 1 Introduction Quality assurance of AM products is crucial to ensure functionality and safety of the products. Metal AM can suffer from a wide range of defects such as porosity,
To find out if a different combination of additive manufacturing recoater and metal powder has any impact on the end quality of a build, we chose three
Laser-Powder Bed Fusion (LPBF) has been extensively utilized by a broad range of manufacturing industries in recent years. Fabricating parts with high mechanical properties and smooth surfaces has motivated such industries and academic communities to study different aspects and steps of the LPBF process, including powder spreading, laser
Additive manufacturing (AM), opposed to conventional subtractive manufacturing technologies, is an advanced manufacturing technology that can
With more than 20 years experience in metal Additive Manufacturing, our machines have been designed to master detail and optimize productivity. Reliable. Repeatable. Industrial. AddUp machines are built to do serial
The powder spreading inner-step of the LPBF process is dominated by powder feedstock characteristics, such as PSD (µm) and surface energy (mJ/m 2 ), and
Experiments #1 and #2 are designed to create the inhomogeneities scattered powder, protruding part, and ripples by making the recoater collide with the manufactured samples (cf. Fig. 4, a). Two samples have a square 10 × 10 mm 2 cross section that is twisted by 90° across the 10 mm build height, one ending in a 10 × 10 mm
Table of Contents. Selective laser melting (SLM), also known as direct metal laser sintering (DMLS) or laser powder bed fusion (LPBF), is a powder bed fusion technology used in additive manufacturing. SLM uses a high-powered laser to fuse and melt metallic powders together to produce fully dense 3D objects layer by layer.
Introduction. One of the most widespread additive manufacturing (AM) technologies is powder bed fusion, especially its laser-based version (L-PBF). Some of