One of the most widely used additive manufacturing process for medal devices is Laser Based Powder Bes Fusion (LB-PBF). LB-PBF facilitates mass customisation of parts due to the design freedom and the fact that specific tooling is not needed to adjust designs. This makes it a useful tool for producing medical devices and implants, which can be tailored to the customer’s needs. Qualifying the LB-PBF process and parts produced by LB-PBF machines for use in the highly regulated medical devices field takes significant time and resources. There are very few published standards to guide manufacturers when it comes to part quality control, limiting the ability of the industry to be agile and to employ the MaaS models for more efficient machine usage. Our aim is to apply the Digital Twin concept to LB-PBF processing to improve process oversite, facilitate MaaS production models and increase confidence in this production method.
PURPOSE OF THE EXPERIMENT
It has been established that parts printed on different LB-PBF machines often have physical and material variances due to the complex nature of the process. Many machines vendors have added process monitoring sensors of different types to machines to identify and correct for these variances. The analysis of sensor data in material and part development is well established on individual machines. However, to facilitate MaaS, a procedure needs to be developed to standardize the collection and processing of data from different machines in different locations, and a framework put in place to share and compare the data to aid in process validation and quality control.
3D Medlab, the end user, and IMR, the Digital Innovation hub, will be carrying out a series of experiments to identifying key indicators in the process sensor data, understanding how variation in the data impacts the quality of end use parts, and identifying what the acceptable level of variance is between 2 LB-PBF machines producing the same part. This will allow for the development of digital process models to compare the performance of different machines and improve confidence in decentralized manufacturing.
Experimental Technical Architecture of Experiment 4.
Our DigitBrain solutions aims to improved transparency and trust in the LB-PBF process, facilitate decentralized manufacturing, and help with the development of technical standards for how the LB-PBF process is qualified and monitored. This experiment is developing a standardized method for ingesting and analyzing process monitoring data so that it can be compared in a meaning full way across multiple platforms. This will aid in the development of models for the ideal working parameters of LB-PBF machines to be used to streamline product development and increasing the agility of high-performance markets like the biomedical and aeronautical sectors.