3D printed worm gears designed in Fusion 360

[Music] hello welcome to my tech file i'm igor and in this video i would like to show you how to design a later trigger print a warm gear using a fusion 360. what is a warm drive well it's a pair of gears where one of them looks like a treated cylinder and it's called a warm or warm screw and the other looks like a spur gear but it's not equal and it's called a warm gear or warm wheel unlike with the spool gears where the axes are parallel with each other here the one of them is rotted under 90 degree angle big advantage of the warm gears that we can have very big transmission ratio because one rotation of the wall will move the wheel by one tooth so for example if you want to have one to 60 radio speed reduction all we need is 60 feet wheel just for comparison with the spool gears uh if you want to keep the number of the teeth between 12 and 60 in this case we will need six gears to have the same 160 ratio but there is one big disadvantage with the worm gears and that is a big friction compared to the pair of spur gears and because of this friction we cannot reverse the drive so we cannot rotate the wheel to get very high rotation of the wall if we want to do this then we need a very big pitch angle for example i use this method to in this fully 3d printed top toy you can see this video link is in the description few examples of the usage but for example now i'm on my workplace in the food engineering department and i want to do some experiments with the mixing fluids measuring the power the torque rpm and similar and i want to use this small dc motor the problem with it that it has very high rpm rotation speed and providing very low torque so probably doesn't have enough power to rotate this propeller in the fluid so that's why i need this gear reduction quick tip if you already know the rpm for your future pro project try to buy the dc with the mounted gearbox of course search with a proper rpm on the rated voltage and you don't have to mess around gears and vomits unfortunately in future 360 we don't have these tools for inserting uh worm gears into our design for sport gears the tools are there so with few clicks we can have these purges part of our design my method is not perfect so you will see uh it cannot be actually i didn't test it combined with the standard wheel for example uh but if we pre 3d print both parts they can work together a few dimensions we can choose freely for example in my design we can choose the outer diameter of the worm it in my design it will be 16 millimeters and of course the length is not so important in my design it will be 14 millimeters and of course i have to choose the ratio and i want 1 to 60 ratio and with this information the diameter of the warm wheel has to be calculated so it now it will be given and also very important the distance between two axes is also given and it it has to be very precise because especially with the small teeth the best is if you can solve that position one of the gears can be adjusted a little bit okay i think it's time to start with the future v60 okay let's start from the sketch in this plane let's draw a circle let's see 16 millimeters let's extrude it to make a cylinder make symmetrical extrusion 14 millimeters fine and now we have to add the treat of course this has to be modded and very important that i i will use a trapezoidal trade for this now maybe this one is a little bit big so i can change here i will change it to three millimeter pitch size in this case so it's a little bit smaller this is very important number three millimeter pitch size will need that value later okay basically our worm is ready and now let's create that second gear and we will create it in this sketch first i need some contour lines from this previous worm gear for this i have to create a project intersect project body okay let's click on this and if i hide the body okay i can have these contours and i have to add some guidelines first i have to create this line from middle of this line to middle of this line this will be the reference diameter from my second gear but i have to add two more guidelines now this line will be the 0.2 millimeters this will be the tip and the root diameter for my second gear 0.2 millimeters okay and one more very important guideline is from the middle of this line i will go down vertically and of course this also has to be construction line i will extend that it okay now i have to draw the circle from the second gear i will start with the reference diameter so circle somewhere here on this line i will add the dimension later and until this intersection and very important is the diameter of this circle now uh here is the equation uh the d equal uh pitch multiplies z divided by b so in my case three multiply 60 divided by b is equal 57.9 0.3 57.3 millimeters so this dimension of this is 57.3 millimeters in this case we can place a 60 teeth on this gear of course i basically need the tip diameter here because this one is only a construction line only reference fine one very important imagine we have to check and that is the distance between two axes because we will need this value where we are mounting the gears okay let's extrude this let's finish the sketch extrude of course i need to make a cylinder eight minutes so this is the base this is a cylinder of my second gear and here now i have to use a combine tool so i have target body is this one tool body is the form gear and i want to cut but i want to keep the tool so i have to check this okay and if i hide the worm i can see those grooves made by with this cutting but only this middle groove has the full size so i have to remove these four now removing this there are several methods one of them is select the surfaces one by one and click delete button sometimes that doesn't work in that case you can use a press pull tool so i will click on this surface on the side and and you using the pull tool and okay and as you can see it's removed now one more time on this surface for example if i use this pull two oops not so much that's enough click and now we have only this one groove because it has full size now we have to copy this uh 60 times because we need 1 to 60 ratio but before i do that i want to add some clearance so first i will use the press pull tool and i will use and holding the shift to select these surfaces minus 0.1 millimeters and maybe one more time i use another 0.1 on this surface new offset minus 0.1 now let's turn on the form yes it would be good to see in section analyzes how does it look like inspects section analyzes looks good now i have to copy this 60 time for this i will use a pattern tool circle pattern and i will select faces right so it's borders here i have faces not body and now the x is well axis is middle center hole of this cylinder so i will click on this cylinder so it knows it's in center and i have 60 times and i hope this is very important moment because sometimes weaker computer may crash here but now we are lucky so it's done and the base of the second gear is also prepared let's analyze it a little bit better looks good let's see section analyzes okay there is no intersections here and let's see one more time so this is how it looks like base of gears are ready now only i have to create those holes for shafts and similar so let's see those design steps because it's not so important in this video now here i created this hole on the worm next i created this cylinder actually it's a ring and i removed it i cut it from the worm i add this stepper and now i have the this this will be the base for the set screws to mount on the shaft now these are holes for the square nuts they will be inserted in this plastic from in the poc as a pocket inserts and then i extrude them i created this hole it's four m3 set screws so the hole is a little bit bigger than three millimeters next step was to prepare the big gear i created this hole and also i created this holes here to save some material i created some fillets here and i added this cylinder and again i added a hose for m3 square knots fine it's ready for 3d printing so this is the warm preview in the crucial slicer and this is the warm wheel also can be printed without any supports [Music] conclusions this method can be used for 3d printing warm gears this is my first print and i noticed that these gears are much noisier compared to the metallic versions and i'm not sure about the varying of this plastic in my final setup i will reprint gears with four millimeter trapezoidal thread as originally suggested by fusion360 and size on rated voltage rpm is still too big i will use a pair of spool gears in combination with worm gears oh yes and if you are buying a dc motor try to find a version with some mounting hose or similar because now i have to trigger print some holder to this one that would be it i'd hope this was useful and i hope somebody can give me a better solution for this because it's not perfect i hope maybe in the future these tools will be added to the fusion 360. so with few clicks we can insert these formulas but until that so far i don't have better solution thank you for watching and happy printing bye

Channel: My Tech Fun

Views: 32,788

Keywords: worm gears, worm gear, 3d printing, fusion 360

Id: -6GqEHRKFXQ

Length: 15min 52sec (952 seconds)

Published: Sat Jul 18 2020