PSI - Issue 59

O.M. Zaika et al. / Procedia Structural Integrity 59 (2024) 786–792 O.M. Zaika et al. / Structural Integrity Procedia 00 (2019) 000 – 000

788

3

In general, recent research in the field of 3D printing emphasizes technological improvements, new materials and applications, opening prospects for revolutionary changes in manufacturing and other areas. 2. 3D printing process 3D holders should be compact and have no protruding edges, as they have to provide the functions and the possi bility of fixing the clip-strip by means of electrical tape. However, they should also hold the clip on the PCB and have sufficient rigidity to prevent breakage when the wiring is removed from the PCB. Considering that metal clips have a longer shelf life and can be used many times, but with today's urgent changes, delivery delays and manufac turing costs, plastic clips have more advantages to ensure uninterrupted production. We obtain the required location of the holder in the space to drive the connectors into the vehicle frame from the input data of the PCB drawings. Therefore, ensuring the correct output on the assembly boards is our main priority. However, if we have specific requirements for a particular bracket, making such metal brackets is a long and expen sive process. The price of a metal part can be 10 times higher than a plastic equivalent. When designing holders for small plugs, we need to ensure that the plug is firmly positioned on the board, or special positioning is required. This includes ensuring that the wires are stuffed into the plug, and that the plug is strong enough to stay in place and withstand being wrapped around the product with electrical tape. Holders for large connectors also have different design solutions to hold the connector in the required position on the PCB. The brackets need to provide a strong hold as the wires are precisely inserted into the connector on the production lines. Most of these holders have an engraved pattern of nests. The engraving of metal holders is an ex pensive operation, and in some cases, the price of the holder is equal to the price of the engraving on its surface. Thanks to 3D printing, this operation becomes familiar and does not require a lot of time and materials; the main thing is to create this engraving on a 3D model of the part and get the desired result.

Fig. 2. Layout of a plastic holder with Gebel 6 metal fasteners.

Engraving in plastic holders (see Fig. 2) is also done using a 3D printer. Therefore, the side edges should be as rounded as possible. It is well known that when the model partially cools down during printing, there is a directed tearing force at sharp edges, and at rounded edges it is distributed along the edges of the rounding. To improve ad hesion, the surface must be degreased and free of dust and plastic residue. Platform degreasing is one of the most important indicators of successful, high-quality printing. Before printing, every 3D printer squeezes out the remain ing material in the extruder to create a smooth first layer of material. However, a microfibre cloth and alcohol solu tion can be used to degrease and remove dust. Printing times vary widely, from a few minutes to tens of hours. Print ing time depends on factors such as the number of objects to be printed, the complexity of the models and their dimensions. The energy consumption of the various components of a 3D printer ranges from minimal for the display to significant for the stepper motors that remain in constant motion throughout the printing process. The largest power requirements are for heating the platform table and extruder throughout the printing process. Improving print quality and minimising power consumption are key issues when modernising equipment, especially when it comes to an entire printer farm of 9 printers operating continuously 24 hours a day, 7 days a week.