Fluid Power Challenge: Workshop Day PRESENTERS:

Discovering Fluid Power Video Stop at 4:15

Introduction to Fluid Power

Fluid Liquid Gas Water Oil Air Nitrogen Hydraulics Pneumatics What is a Fluid?

Hydraulics Pneumatics Examples of Fluid Power Airplane Flaps Automotive Brake Dentist Drill Pneumatic Drill Excavator Hydraulic Press Office Chair Nail Gun Advantage and disadvantage to each? / How far away is the power source for each?

What is Pressure? Molecules Pump Tank Hose Pressure is eventually the same everywhere

What is Mechanical Advantage? Image Source: en.wikipedia.org/wiki/Lever

What is Mechanical Advantage? e.g. Hydraulic Lift 100 lbs Use 60ml and 10ml syringe to demonstrate mechanical advantage. Piston Area = 20 in2 Piston Area = 1 in2 Pressure = ?

How much force is exerted by the piston? Pneumatic Cylinder Diameter Pressure P Area Force F Side View of Cylinder Cross Section of Piston How much force is exerted by the piston? If pressure = 60 psi and diameter = 1 inch: Area = pi x (1 in)2 / 4 = 0.785 in2 Force = (60 psi) x (0.785 in2) = 47 lbs/ in2

WEAR SAFETY GLASSES NOW! Explore Tool Kits! SAFETY FIRST! WEAR SAFETY GLASSES NOW! Don’t Open Workshop Kits Yet!

Verify Kit Contents Item Description Quantity Bench Hook/Mitre Box (double-sided, 7/16" slots) 1 C'-clamp (3") Acrylic Ruler (with 1/16" inch divisions) Kerf Razor Saw Scissors (5` rounded, 1 pr) Craft drill Wood drillbit 3/16" (brad pt) Round file with handle (1/4" diam.) Safety Glasses clear lens 4 Mini low-temp Glue Gun, 10W What is the bench for? What in this kit could hurt you or others?

Using 2ft. wooden pieces from the Workshop Kit as needed, a small amount of wood glue and green cardboard triangular gussets, build two squares each with external sides of 4” Each pair builds 1 square. Build one first and make sure the 2nd is the same

Construct the lifter and rotating platform using the materials in the kits, instructions in your folders, and tools from the tool kit

Divide Tasks Elect Group Leader Assign Roles: Leader (Check progress of parts and help where needed) Wood Cutter / Later Arm Builder Cube Maker 1 Cube Maker 2 Without dividing tasks and working in parallel, you won’t complete the activity. (Same on challenge day)

Lifter Kit – Bill Of Materials Item Quantity Description 1 7 12” Wooden pieces (⅜” cross-section) 2 Cards of green corner gussets 3 20cc Syringes (1 has a hole in the plunger) 4 Length of plastic tubing 5 5” long 3/16” Wooden Dowel 6 3” long 3/16” Wooden Dowel 16 White Cardboard Axle Holders 8 Syringe Holder 9 Mini-washers 10 Stirring Sticks 11 Small piece of sand paper

Rotating Platform Kit – Bill of Materials Item Quantity Description 1 4 8” Wooden pieces (⅜” cross-section) 2 1 of each 3¼” Wooden piece & 2¾” piece with hole 3 20cc Syringes (1 has a hole in the plunger) Length of plastic tubing 5 Wooden Dowel, 3/16” diam., 1⅝” & ⅞” 6 Wooden Dowel, ⅞”diam., 2⅞” 7 Large wheel & medium wheel 8 Syringe Holder 9 4” square platform 10 Card of green corner gussets 11 Small piece of sand paper & stirring stick

Lunch!

Lifter Kit – Reflection What was the hardest part to build? What was the most difficult part to coordinate? Why did we ask you to build this lifter as part of the challenge? How can you make the process more efficient?

The Challenge

The Challenge Objective To design a robot, to be built on challenge day in 2.5 hours, using only the supplied tools and materials, that can score as many points as possible. Deliverable Two portfolios on Challenge day Notes We are using the “with hands” variation.

Discussion Why is one destination position worth more points than the other? What if you design a robot that only works when using your hands? How long will you have to move cylinders? What tools/materials can you use in your robot on Challenge day? What are the contents of the Challenge kit you’ll get on Challenge day?

How to Maximize your Points!

Awards are given for each sub-category and for overall. Discussion How many points are determined without competing with your robot? What pre-challenge action can you take to get the most Teamwork Skills points? Or the most Interview Question points?

Know the Grader Rubric Show that device is structurally sound. 1-5 points. Team 1 -> Team 2 -> Which team is more likely to get points?

Sketching is a way of communicating ideas

Sketching is a cheap and fast prototype, a simple way to explore new ideas. Fast way to explore options You could cut and glue everything to explore your mechanism idea, but that takes a lot of time. If you sketch it first

Examples of tasks Read project rules Research clamping mechanisms Research rotating mechanisms Sketch ideas for clamping mechanisms Build prototype mechanisms Sketch whole robot design Build whole robot Practice challenge activity Read portfolio scoring rubric Generate final sketches of design for portfolio Write a description of the principles of strength and stability Write an explanation of the chosen location of your syringes Have writing reviewed by a mentor Assemble all portfolio elements into a final report

Identify concrete tasks and milestones Read rules and scoring rubrics Build prototype rotating mechanism Have draft portfolio reviewed by a mentor Milestone: Assemble writings and sketches into final portfolio Milestone: Finalize robot design Research clamping mechanisms Tasks Remember, as Ben said, you don’t have to bring a robot to the competition in 50 days. Can anyone tell me what you have to bring? Portfolio. It’s a lot of points. the first thing to do is identify what tasks you will have to perform. These are things like xyz. Additionally you identify major milestones. It is important to remember that even though you will be building robots to learn about them, you will not be building one for the competition day. Can anyone tell me what deliverable you will be bringing on competition day? Portfolio. So lay out tasks for portfolio as well.

What you should be doing right now Identify 3 tasks or milestones Lay out the schedule Choose dates for your milestones Go do it

Watch videos from previous Fluid Power Challenges on the web at: http://www.nfpafoundation.org/fpchallenge/pastchallengeevents.aspx or google: “Fluid Power Challenge” Successful products are always made by carefully researching existing products. Just talk about value of iterative prototyping. Don’t need to use the syringes, just get used to working with the materials. Know its limits so your sketches have more value.