Week 11- Assembly Workbench

AIM: To create the assemblies and draft the individual parts and assemblies.

QUICK RETURN MECHANISM

A quick return mechanism is a device that generates a reciprocating motion in which the return stroke takes less time than the forward stroke. It uses a system of links with three turning pairs and a sliding pair to be driven by a circular motion source (usually a motor of some sort). With an offset crank, a quick-return mechanism is a subclass of a slider-crank linkage.

An assembly is created by creating individual components with the help of given drawings.

Rocker

Fig 1 : Rocker part body

Fig 2: Rocker drafting

Rocker arm

Fig 3 : Rocker part body

Fig 4: Rocker arm drafting

Slider

Fig 5: Slider

Fig 6: Mounting bush

Fig 7: Pin

Fig 8: Bush, pin and slider drafting

Assembly

Fig 9: Quick return mechanism assembly

Fig 10: Quick return mechanism drafting

CONSTANT VELOCITY JOINT

Allows a drive shaft to convey power across a varied angle while maintaining a steady rotating speed with minimal friction or play. They're mostly found in front-wheel-drive cars. CV joints are commonly used at the ends of rear axle halfshafts and are increasingly being used on the drive shaft in modern rear wheel drive cars with independent rear suspension.

An assembly is created by creating individual components with the help of given drawings.

Main body

Fig 11: Main body in assembly environment

Fig 12: Main body in part environment

Fig 13: Drafting of main body

Joint

Fig 14: Joint in assembly environment

Fig 15: Joint in part environment

Fig 16: Joint drafting

Rocker

Fig 17: Rocker in part environment

Fig 18: Rocker in assembly environment

Fig 19: Rocker drafting

Assembly

Individual parts are imported into assembly environment as shown in figure. A skeleton part or a refernce part is created.

Fig 20: Parts imported in assembly environment

Main body is constrained using coincidence with the skeleton part created.

Constraint used

• Coincidence.

Fig 21: Constraining skeleton part and main body

Joint is constrained onto mainbody using

• Angle constraint.
• Coinciding the axis of main body and joint.

Fig 22: Constraining main body with joint

Final assembly is created by assembling the rocker onto previously created assembly using the coincide constraint.

Fig 23: Final assembly

Fig 24: Final assembly drafting