CATIA V5 Modelling and Kinematics Project

STACY

THE NITRO RC CAR

Chris CiambellaCory Lazzarato

Jack GilliesJoshua MolinaJeremiah Gill

CATIA MODELING AND KINEMATICS PROJECTFOR AUTOTECH 2AC3

INSTRUCTOR: LUCIAN BALAN

STACY

THE NITRO RC CAR The Car

• Unknown Brand

• Bought “From China”

• 2 different cars – one to take apart and model, the other for assembly reference

Group

STACY

THE NITRO RC CAR

Overview

• 219 components

• 300+ man-hours

• 65 “Final Assembly” Files

• 27 CATIA Crashes during assembly

Group

STACY

THE NITRO RC CAR

How It Works• 2-Stroke Nitro Engine

• Centrifugal Clutch Output Gears

• 2-Speed Transmission with Centrifugal locking for 2nd

gear

Group

STACY

THE NITRO RC CAR How It Works• Universal drive shafts to front/rear differentials

• Universal shafts from differentials to wheels

• Servo-driven steering and throttle

• Brake applied to transmission shaft upon throttle reverse

• Overall ratio of 6.7685 crankshaft turns per wheel turn in first gear

Group

STACY

THE NITRO RC CAR

Group

STACY

THE NITRO RC CAR

Frustration

• 60+ hours for kinematics and assembly alone

• Save paths corrupted and work lost

• Many attempts to restart without success

Group

STACY

THE NITRO RC CAR

When There’s A Will…

• File of all rigid parts in assembly made called “The Gods”

• Moving parts inserted into The Gods and Kinematics added

Group

STACY

THE NITRO RC CAR

There’s a Way

STACY

THE NITRO RC CAR

• Front Differential

• Front Suspension

• Drive Axles

Responsibilities - Cory

• Steering Knuckles• Coilover Suspension

Cory Lazzarato

“Never have I wanted less from a program.”

-Cory

40 Parts

STACY

THE NITRO RC CAR Self Taught Parts

• Bevel gears generated from gear sketch produced in class

Cory Lazzarato

STACY

THE NITRO RC CAR

Self Taught Parts..

• Coilover produced in the Generative Shape Design workbench

Cory Lazzarato

STACY

THE NITRO RC CAR

Difficulties

• Assembly of Differential/ Drivetrain Kinematics

Cory Lazzarato

STACY

THE NITRO RC CAR

The Engine

Chris Ciambella

Two Stroke Nitro Engine

42 Parts

STACY

THE NITRO RC CAR

The Block

Chris Ciambella

STACY

THE NITRO RC CAR

Wireframe & Surface Design

Chris Ciambella

STACY

THE NITRO RC CAR

Wireframe & Surface Design

Chris Ciambella

STACY

THE NITRO RC CAR

Wireframe & Surface Design

Chris Ciambella

STACY

THE NITRO RC CAR

Chris Ciambella

STACY

THE NITRO RC CAR Joshua Molina

21 Parts

STACY

THE NITRO RC CAR

Top Component FrameJoshua Molina

STACY

THE NITRO RC CAR Sheet Metal Design Joshua Molina

STACY

THE NITRO RC CAR

Joshua Molina

STACY

THE NITRO RC CAR

Joshua Molina

STACY

THE NITRO RC CAR

Joshua Molina

STACY

THE NITRO RC CAR

Responsibilities - Jack

• Gas Tank Assembly

• Transmission

• Wheel & Tire

• Muffler Assembly

• Frame

• Bumper Assembly

Jack

“No, YOU’RE unnecessary”-Jack

36 Parts

STACY

THE NITRO RC CAR Gas Tank Assembly

• Padded Body with chamfered sides

• Padded extremities

• Shell Body

• In-Context design of lid

• Assembly

Jack

STACY

THE NITRO RC CAR Transmission• Brackets painstakingly measured

• Initially spur gears, changed to helical gears

• Shaft made by…shaft command

• Functional shaft brake using cam lever

• Omitted centrifugal clutch on 2nd

gear

STACY

THE NITRO RC CAR Transmission Jack

STACY

THE NITRO RC CAR Wheel/Tire

• Shafted components

• Spline groove cut to curve rim ribs

• Tangent plane for tread sketch

• Tread circular & rectangular patterned

Jack

STACY

THE NITRO RC CAR

Muffler• Revolved splines to

generate shape

• In context design of bolt lips

Jack

STACY

THE NITRO RC CAR Out-of-Class Component –Helical Gears

• “Twist” angle of one sides profile generated by helix angle value and height of gear

• Profile projected, rotated

• Surfaces generated

• Surfaces filled

Jack

STACY

THE NITRO RC CAR

Rear suspension - Jeremiah

• 34 different parts

• 3 sub assemblies

Jeremiah

STACY

THE NITRO RC CAR

Symmetry Function• Problem: part needed to be

mirrored, but I cannot mirror and delete the original

Jeremiah

STACY

THE NITRO RC CAR Symmetry Function

• In the assembly workbench insert the part

• Go to insert Symmetry

Jeremiah

STACY

THE NITRO RC CAR

Symmetry Function

• Select a plane and the object to mirror

Jeremiah

STACY

THE NITRO RC CAR

Symmetry Function• New part created symmetrical to the other

Jeremiah

STACY

THE NITRO RC CAR

Creating a spring

• Use wireframe workbench

• Draw a helix

Jeremiah

STACY

THE NITRO RC CAR Creating a spring

• Use rib command and make the sketch follow the helix

• Create flat ends on the top and bottom

Jeremiah

STACY

THE NITRO RC CAR

Questions?