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根据您3D打印部分的预期用例，结构完整性可能是至关重要的成分。这可能是确保您的产品在使用时不会崩溃的，甚至是确保用户安全的问题。2022年的世界在多学科行业（例如航空航天，医疗，汽车，甚至在家中的个人使用）中，对3D印刷零件的需求极大地加速。选择最佳3D打印设计提示for layer direction, design and material for your 3D printed parts can ensure the best structural quality for your product.
We’re going to look at an artistic, yet functionalWacom pen holderas an example and ascertain the different considerations and precautions utilized to ensure structural integrity in the 3D print.
For those of youusing your own 3D printer, this will help you understand the best settings to use. If you’reordering 3D print parts online，这将使您更好地了解可用于耐用的3D打印零件的不同技术和材料以及与供应商交流的内容。
对于此产品，艺术家的Wacom笔或写作仪器将插入笔孔中，并按照下图所示的力量使用力。该力相对较小，并且施加了与笔上的重力或写作仪器相同的方向。
我们能做什么来确保这个笔架long lifespan? There are a few design optimization methods to utilize to ensure durability and the most effective material usage. Read on to learn our top three tips.
1.层方向
One of the biggest considerations for the durability of your 3D printed parts is the direction of the 3D printed layers. If possible, you want to reduce the potential for a failure due to a shear force since you want your vertical force to distribute amongst the layers at a direction perpendicular to the layers. Therefore, it makes sense for your layers to be printed horizontally. Alternatively, if the force on your 3D printed structure is coming in from the side, underneath, or at any angle other than straight down, we will get an effect calledshearingamongst the horizontal layers.
Most engineers are already familiar with the term shearing, but for the designers, think of this as a deck of cards; they won’t slide apart if you press down on them from the top, but if you push them from the side, the deck will fall apart because the layers slip apart easily. The same concept can be applied to 3D printed part: the cards are like the 3D printed layers that make up a solid object with more force applied to it.
If you’re working with a 3D printing vendor, the main takeaway here is to make sure you explain the intended use of your part so the operator can choose the best build orientation.
2. Density
可以保证更好结构完整性的另一个元素是您的3D打印材料密度。在每个FDM打印机的软件中，通常都有一个填充密度选项。这些打印机的软件会自动知道在模型内部打印出丝图案。
At the default setting of 20%, your Fill Density will fill up your model with a nice light amount of filament. This is designed to provide stability while also reducing printing time and material costs. However, if structural integrity is a critical feature of your project, the Fill Density percentage can be increased.
By simply increasing the Fill Density by an extra 10%, you can see the Viking Wacom Penholder will be printed as a much more solid and slightly heavier object:
如果我们跳到一个SLA打印机（例如表格1 +），这些打印机会自动用树脂填充所有几何形状。许多人在打印之前“挖空”了自己的模型以节省时间和材料成本，但是由于我们希望提高结构完整性，因此用树脂填充整个几何形状是一个不错的选择。
If you do decide to hollow out your model, 3mm minimum wall thickness in VeroWhite is a good place to start. Go from there to determine the best wall thickness for your application.
3. Material Choice
Another one of the most important considerations for structurally sound 3D printed parts is choosing the strongest 3D printing material for your application. Here are 3 great options for durable 3D printing mechanical parts:
- ABS- 非常适合需要有力量但不会大量使用的零件。细丝直径的变异性也引起了对冷却过程中整体零件形状，精度和变形的关注。
- 类似ABS的 - 比ABS贵，但非常适合将获得大量使用的3D打印零件。
- Nylon – most expensive material, but works great for 3D print parts that will receive heavy use and need to be high-resolution (i.e. visual models).
- PLA - 销售一种可回收替代方案，在冷却过程中不易翘曲。但是材料在相对较低的温度下开始分解。
- PTEG – a widely utilized thermoplastic 3D printing filament which has excellent strength, impact resistance, transparency, and stability.
Your material selection should also take into consideration the moisture content of the plastic filament. Depending on the 3D printing bulk material you chose, they can either be hydroscopic (moisture loving) or non-hygroscopic (moisture resistance). Any presence of moisture in these bulk materials can cause your final product to be brittle or structurally weaker than its 3D printing mechanical parts design.
If you want to use 3D printing materials other than plastic resins or are looking to produce more than 1 or a few products, you can consider other fabrication technologies including:
- Direct Metal Laser Sintering
- 多喷射融合
- CNC Machining
- Electron Beam Melting
Follow the tips in this article to ensure your 3D printed parts perform to the best of their ability.
Here’s what the final pen holder design looks like molded and cast out of metal:
Quick FAQS:
- 3D printed parts are as strong as their weakest layer due to their additive manufacturing method. A 3D printed part is typically weaker than a part manufacutred utilizing another technology, such as milling, molding, or resin pouring.
- 3D printed parts offer a great durability for their manufacturing method and modifiable geometry.
- Polycarbonate is the strongest 3D printer filament by many manufacturers.
- As described in this article, strength of 3D printed parts is impacted by layer direction, density, and filament material selection.
