Transcript:
I’m currently working on a small project where I need a threat in my 3d printed part because it needs to be threaded onto a faucet outside I spin modeling and 3d printing threaded parts for quite a while. Why I thought I’ll show you how that’s easily done in fusion 360 and share some best practice with you. Guten tag everybody my name is! Stephan and welcome to CNC kitchen. So there are a couple of ways how to model threats in fusion 360 from very simple ones to more complex ones, depending on the application. You need to choose the method, which is most suitable for you. Fusion 360 has quite a nice threat tool since some time, which includes threat models for probably 90% of your applications. My father, for example, has a g3 quarter pipe thread, which is also included in the library and the part fits perfectly on its first print, so lets. Take a look how the tool is used. Okay, so let’s start with the first method, which is also the most simple one in this method. We’ve gonna use the integrated thread tool and fusion 360 to create our thread in order to do that. We will at first create a cylinder and on the outer diameter of cylinder. We will create a thread so I will create a new sketch in here circle. I want to model an m10 so a metric 10 millimeter thread with a pitch of 1.5 millimeters, so I create a circle with 10 millimeters in diameter, but the diameter actually is not that important because it will later be adjusted when you create the thread. Okay, then we are extruding the circle to get a cylinder and now we can go under create thread and just select the outer diameter of the cylinder. Fusion 360 will already prompt us with a threat which fusion things is the meal most suitable one. So since we have chosen a cylinder with 10 millimeters in diameter, it’s already selected a metric profile, 10 millimeter in diameter and [Music]. Right here, the pitch, so the most coarse one 1.5 millimeters that if you want to go finer, there’s also the possibility to select all the other ones, which are in the ISO standard. The class right here is the tolerance class so 6g Is the nuts out tied one? If you want to have a little bit more tied, you can select for g6g direction, right hands. And now there’s actually come something quite important. So if you want to later 3d print this stress, it’s not possible. If you just do it this way, because if we say OK, the threads, you will see the threat right here. But that’s just a visual representation. So in the STL file, only a cylinder would be exported. And that’s not what we want to have, so it’s very important that you select right here. This option, which is modeled if you select that the threat will really be modeled as a three-dimensional part. And if you export it now as an STL, the STL will also include the geometry of the threat as you can see it right here, so it’s actually really simple. The same procedure can also be used. If you want a model enough, so an internal thread, So I will just hide this body right here. I will create a new circle, which has an inner diameter of like something around 8 millimeters. I create a second circle, which is 13 millimeters in diameter. We extrude this annular profile so something like 3 millimeters and it’s just as simple as that so select thread again select the internal diameter select the right size of your thread, 10 millimeters 1.5 millimeters pitch select modeled and hit. OK, so this is already our internal thread, so or not. If we do a section analysis, we can take a look at how good they match up, so let’s do it this way and take a look at it. All right, so you can already see that there is already some kind of tolerance included in your model, and that’s good because a thread just works. If there is a tolerance between the two parts. In some cases, the tolerance, which is included in the model, might not be sufficient for the specific kind of printer You’re using or the material you’re using, and there is kind of a simple way to just make the tolerance a little bit bigger, and that’s it’s working like that, so you select the modify tool, select this part right here and just extrude it a little bit on the inside, so just by like 0.2 millimeters, this will increase the clearance in here and additionally select one length of your thread and two more or less the same thing, so just also by a tiny amount or 0.1 millimeters 0.2 millimeters. You just sometimes need to to try it out, which works best for you and for your application, but that’s how you increase the play between your inner thread and your outer thread, and this is how you can adjust the play between the parts and make sure that they are later movable when you print them out, okay, So the second method uses the coil tool and with the coil you can, for example, do some some round threads which which might be useful for, for example, a ball thread or something like that. Okay, so we start again with a cylinder, so I create a circle. Let’s use 20 millimeters as a diameter. I choose the cylinder and then we go into the coil tool so for the coil tool you at first need to define a diameter and that’s the diameter of the coil itself, so not the wire, but the diameter of the coil of well the diameter of the of the winding. So I select this plane again. I create a circle which, in my example, has the same diameter as our cylinder, so 20 millimeters. Okay, and then you have different options, so for the type. I want to say height and pitch because usually you know the pitch, and you know how high your thread should be. You can just drag this a little bit right here. Change the section diameter. I change this to 4 millimeters high, for example 1 I have a pitch of 6 millimeters and then you just hit. Okay, and there. You have your whole thread so to make it even nicer. What you can do is, for example. Add an additional. Philips right here and right here. I’m just like well. 1.5 millimeters let’s see and hit. OK, and you have a really nice threat, which is going all around of your part. Cool, okay, so the last method. I’m going to show you is also the most advanced one. This method will enable you to create any thread shape. You you want to have, and for this? We’re going to use different tools and at last, the sweep command so for this? I am going to create a cylinder again. So circle 12 millimeters in diameter hit. OK, stop the sketch, extrude the sketch to have a cylinder. Let’s make it to 20 millimeters high. Okay, so what we want to have now is we wanna revolve a sketch? We create around our cylinder, but it’s not just on one plane, but we want to have it in something like a helical shape, so I haven’t found so far in easy methods to create this helix, so we wanna we, so we will use a separate tool to create the helix, and then we create a sketch to finish our profile. So what you’re going to use is the coil tool again, So I selected. I select this surface right here select. The origin of our coordinate system make it 12 millimeters in diameter. So this time we won’t use a circular pattern, we will use a triangular one. So for this one, we gonna use a triangular external section and we will set the section position to inside. Yeah, there we go. We will just make this a little bit smaller, and then we will adjust the the parameters of of our thread. So one parameter is the height, so we want to go all the way up, and we want to have a pitch of lets. Say three millimeters. So what we want to do later Is we want to extract this helical line right here, which is going all the way around so in order to do that. I will change the operation to a new body. This will enable us later to use this new body to create exactly the silikal shape just hit. OK, and let’s hide our cylinder. So in order to extract the helical line, we will use a projection method, So you gotta go Under Sketch Project include 3d geometry, select any plane you like, and we will select this line right here and you can already see in this purple color that we will get this helical line. Additionally, additionally, we also need a second line because otherwise the command will not work out properly so. I also going to select this line right here. Just say, stop sketch. We where we can hide the body and we can see that we have this really nice line going upwards. OK, so let’s show, so let’s show our first body again. The next thing we need to do is create the shape of our threat. We want to have in order to do that. We will create a new sketch on this surface right here. And now it’s important to use the plane, which is going through these two points right here. Okay, and now we can just sketch the profile we want to have, and this can be as fancy as we like. And now it’s quite important to set the outer line to a diameter, which is just slightly smaller than the outer diameter of your cylinder So I will choose twelve point one. I will also dimension the angle right here and let’s make this, so let’s make it 45 okay, so what’s the lift, okay, and make the width right here? One point to look like one millimeter. Okay, so now we stop. So stop the sketch. And now we will use the sketch. Revolve it around this line right here to cut out our thread, so go under create sweep, select for the type path and guide rail. The profile is the sketch right here. The path is the outer. Phoenix and the guide rail is our inner helix. [music] there! We go so for profile skating. I usually set this to none because otherwise it’s sometimes screws up the dimensions of the thread. We will use the cut operation it. Okay, and there we go. We have our custom threads on cylinder right here. Perfect to make it a little bit nicer. We can also add a chamfer down here. Four millimeters hit. Okay, so now you have seen three methods to model threats in fusion 360 Choose the one you like, best and works well for you. Depending on the printer and the materials you use, there might be some trial and error to figure out the perfect tolerance. But if you master it, there are some really cool things you can do from my experience. Bigger threats with higher pitch are easier to handle than small ones, but it’s usually no problem to even get small ones to work. If you don’t have the cheapest printer, there is whenever I’m working with 3d printer threats, I print out a small section of the part at first to see how the tolerances are if they are too tight. I remove some material. If they are too loose, you can add some material. This can save you quite a lot of printing time. It’s even possible to rethread your part with a normal tab to get it working properly as with most 3d prints. PLA is the easiest material to print your thread because it can handle overhangs very well and due to its brittle nature. It’s easier to rework if you want to have a nice and tight threaded connection, it might be necessary to use some force in the first couple of passes until the sliding surfaces adjust to each other, depending on the size of your threats You have modeled, you will need to adjust the layer height. Small threads might require a layer height of 0.1 millimeters or even less. This might need some trial and error, but usually thinner layers lead to a better result in order to optimize the printing time make use of the layer editing tools and slicer all the processes and simplify 3d they enable you to reduce the layer height only in the region, where your threads are and use thicker layers in the rest of your part. What’s your experience with 3d printing threads? Do you have different methods to model them? Then leave a comment down below, hit that like button. If you learn something, if you want to see more of these videos, please consider subscribing thanks to all the Paypal donations and your general support, which helped me keep the channel running. Have a good one of wiedersehen. And I’ll see you next time [Music]!