3-2-1 Principle of location | 3-2-1 principle of fixture design

[@GaneshPatil-yc1zy]

Thanks, now i got the exact concept 3-2-1 principle method

[@zainal9775]

Adtec shah Alam hadir 🗿success, berjaya

[@NAYAN-t3e]

3-2-1 principle :
3 (2T+1R) - 2 Translation + 1 Rotation,
2 (1T+1R) - 1 Translation + 1 Rotation,
1 (1R) - 1 remaining rotation.
In this way, all 6 degrees of freedom (3T + 3R) of a part should be constrained.

[@MechanicalDesignAdda]

Let me correct you my friend...
3- (1T+2R)
2-(1T+1R)
1-(1T)
And in this way We r constraining workpiece
And also we consider clockwise and anti clockwise rotation as one similarly upward and downward movement as one
I hope you got my point......

[@lok119]

Why you had taken 3 pins on x-axis, 2 pins in y-axis, 1 pin inz-axis

[@MechanicalDesignAdda]

3 pin forms the plane, 2 pin form the line and one pin
And combining above concept it will form the three plane we called it as primary secondary and tertiary plane

[@naveenk5442]

Welding details

[@naveenk5442]

Thanks you much

[@somnathk9483]

Note ta deben please

[@lok119]

Why 321 principle is called only 321 principle

[@MechanicalDesignAdda]

To hold any object we need to restrict 6 degrees of freedom, so the first plane restrict 3 motion, second plane restrict 2 motion and last one restrict one
That's why it is called as 321

[@lok119]

Regarding this

[@lok119]

My question is why 321 we can take 456 also know

[@MechanicalDesignAdda]

As already explained, 321 is because three plane restrict movement of object 3+2+1=6dof
Once we constrain 6dof we can say Part is fully constrain.