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- เผยแพร่เมื่อ 25 ส.ค. 2022
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/ @cadxtraining
Let's design Rack and pinion gear in Creo Parametric
relations for spur gear:
pressure_angle = 14.5° & 20° (Standard value)
module = reference_dia/no_of_teeth /*module
reference_dia = module*no_of_teeth /*reference_dia
circular_pitch = pi*module /*circular pitch
addendum = module /*addendum
dedendum = 1.25*module /*dedendum
tip_dia = reference_dia+2*addendum /*tip diameter
root_dia = reference_dia-2*dedendum /*root_diameter
base_dia = reference_dia*cos(pressure_angle) /*base_diameter
root_fillet = 0.38*module /*root fillet radius
semitopping = 0.1*module
teeth_thickness = circular_pitch/2 /*teeth thckness
clearance = dedendum - addendum
Involute equation:
theta = 90*t
angle_ratio = theta/360
S = angle_ratio*pi*base_dia
base_radius = base_dia/2
Xc = base_radius*cos(theta)
Yc = base_radius*sin(theta)
X = Xc+(S*sin(theta))
Y = Yc-(S*cos(theta))
Z = 0
relations for rack
pressure_angle = 20
module = 3
width = 20
pitch = pi*module /*circular pitch
addendum = module /*addendum
dedendum = 1.25*module /*dedendum
teeth_thickness = pitch/2 /*teeth thckness
tooth_depth=2.25*module
root_fillet = 0.38*module /*root fillet radius
semitopping = 0.1*module
clearance = dedendum - addendum
Since I didnt find them in the description
Really useful..and genuine content..please keep sharing such videos🎉
Thank You sir for putting this tutorial
Thank you sir
I really like your video and you provided a lot of information. Thank You. I do wish that the formulas lead themselves to being converted to imperial measurements would you be interested in converting this to imperial from metric with the updated formulas and geometry?
Great sir, while creating if you give more insides about commands then it will be helpful
@cadx request you to make a video on bevel gear making using parameter as you made spur and helical gears.
Sir,your tutorials are very helpful,can you do for internal gears?
I am so busy these days, not getting enough time to do any new things.
@@CADxTrainingit's ok,thank you👍🏻😂
How to make internal gear?
Hello please make video on sieve web belt sprocket
hello
Is it available in the wildfire version other than the cleo version?
An invalid symbol 'module' was found when substituting it into the relational expression.'
A phrase appears
Any workaround?
Please reply if you have any.
take care
If you follow the same procedure it will work in wildfire. There is no difference in relation between wildfire and Creo.
Hi Mr. I am new in Creo 4. I am confuse. Why after I give dimension to my sketch, the line still be able to deform? Let say my line is 10mm, if I drag the end point it will be larger or smaller than 10mm. I have to manually lock each line. It is a very time consuming job which is kinda different with previous cad software (inventor)
Go to File-option-sketcher and select "lock user defined dimension"
Can you upload that file location link from your Google drive
That relation for spur gear
how are the relationships for the helical rack?
I need to check that
Hello.
I am on Creo 3.0 and I am struggling with the step you did at 09:42 (putting dimensions for teeth thickness
It is same in all the versions. You just need to put arc length there.
@@CADxTraining when I click first point point and second point, and then the arc, the dimension is not appearing. Maybe I am doing something wrong. Please help 🙏🏾
Click the first point and hold the control key. Then click on the second point and click on the arc.
@@CADxTraining Hi im on creo 9.0 and im having the same issue with the tooth thickness. Any idea what i might be doing wrong or missing?
Relation file not in description sir
Check now
@@CADxTraining thank you
Sir can u send this drawing link
I don't have any drawing other than what you see on the screen. Take a snapshot.
Are these dimensions ISO standart ?
Yes
@@CADxTraining how about worm,rack and pinion and helical gears ?. Are these also appropriate iso standarts ?
Yes
@@CADxTraining Will you make a videos about bevel types gears ?
I'll try if I get the time
Where are the rack part relations?
If you watch the full video, you will get the answer.