shop safety practices and idea laboratory...
TRANSCRIPT
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Shop Safety Practices and IDEA Laboratory Introduction
C h r i s t o p h e r S a l d a n a , P h . D.W o o d r u f f S c h o o l o f M e c h a n i c a l E n g i n e e r i n gG e o r g i a I n s t i t u t e o f T e c h n o l o g yA t l a n t a , G e o r g i a U S A
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IDEA Laboratory (powered by Autodesk)
https://www.youtube.com/watch?v=X69bVXh17b8 (Eddie Nguyen, Sec. N TA, EPICS fellow)
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Understand the IDEA Laboratory equipment and tools
Understand safety policies for laboratory use
Identify hazards in manual fabrication processes
Use equipment safely and follow shop rules and procedures
Learning Objectives
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Primary Fabrication Equipment
Engine Lathe (geared, 3 hp, 105-2000 RPM)https://www.mscdirect.com/product/details/09517350
Milling machine (geared, 1 hp, 65-1550 RPM)https://www.mscdirect.com/product/details/64162779
Turning tool
Endmill tool
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Primary Fabrication Equipment
Engine Lathe (geared, 3 hp, 105-2000 RPM)https://www.mscdirect.com/product/details/09517350
Z-Axis Control
X-Axis Control
Carriage (Z)
Tailstock
Quill FeedSpindle
Digital Read Out
E-Stop
Motor On
Foot brake
ChuckTool Post &
Tool
Lathe Characteristics Use: axisymmetric parts Fixture: part is clamped in chuck Primary motion: workpiece
• No need to adjust speed DOF: 2-axis motions (X, Z) Carriage axes: Z(left/right), X(front/back)
Control: handwheels Position: digital read out
Caution: carriage/spindle crashes Tailstock: used for centerline drilling
• Control: handwheel• Position: tailstock marked scales
IDEA Laboratory Lathe
Head Stock
Main Power
Quill
Cross Slide (X)
Compound
Lathe Bed and WaysSpindle
Engage (Fwd& Rev)
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Primary Fabrication Equipment
Milling machine (geared, 1 hp, 65-1550 RPM)https://www.mscdirect.com/product/details/64162779
Milling Machine Characteristics Use: prismatic parts Fixture: part is clamped in vise Primary motion: tool DOF: 3-axis motions (X, Y, Z) Table axes: X (left/right), Y (front/back)
Control: handwheels Position: digital read out
Head axis: Z (vertical) Control: hand crank (coarse), handwheel (fine) Position: digital read out
Caution: tool/vise crashes
Z-Axis Controls (Quill feed –
fine and coarse)
Vise
Head
Spindle
E-Stop
Start
Digital Read Out
Y-Axis Control
X-Axis ControlTool
ColletTable
IDEA Laboratory MillMain Pwr
Quill
Locks on all axis
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Primary Fabrication Equipment
3-axis CNC mill (Siemens 828D controller)https://emco.co.uk/emcomill-e350/
G-code file
Autodesk Fusion 360 (free!)
IDEA Laboratory CNC Mill
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Primary Fabrication EquipmentIDEA Laboratory Bandsaw IDEA Laboratory Drill Press
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Primary Fabrication EquipmentIDEA Laboratory Hand and Power Tools The most important tool…
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Mechatronics AssignmentMechatronics task sheet
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Machining Assignment
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Machining Assignment
Sheet tolerances
Top view
Front view
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Machining Assignment
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Machining AssignmentDigital CalipersAssignment Rubric (HW4)
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ME2110: Lab & Shop Safety
S p r i n g 2 0 1 9J a i m e B e r e z , V B . 0 4S e c t i o n F TA , E P I C S F e l l o w
Master Safety Policy: http://safety.me.gatech.edu
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1. This lecture2. Studio this week – everyone agrees to the GWW User Agreement
on SUMS (bring your ID)• Agreement document (link) is on the course website, it is each student’s
responsibility to review it before studio3. Machining training in studio• TAs certify each trained student on SUMS (bring your ID)• Training takes the duration of studio – being late or leaving early invalidates
your training (make-up independently)4. Safety assessment on Canvas
Safety and Shop Training Procedures
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Setting scope
Rules and procedures
Equipment specific notes
Shop etiquette, cleanliness, and 5S
Enforcement
Contents
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1. The consequences are real; everyone needs to make it home safe at the end of the day
• Severe, life-changing injuries are possible
• You AND everyone around you can be affected
2. Efficiency, professional skill, and courtesy• A safe shop is an efficient shop
• Just like any other engineering skill, this is an important skill to leave school with
• Coworkers and colleagues expect it of you
Why is Safety Important?
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Misconception: being safe, methodical, and deliberate ‘isn’t cool’
Actuality: In the professional world, those who don’t follow safe practices are the ones who receive criticism
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Dangers of a Lathe (and Negligence)
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Dangers of a Lathe (and inappropriate Lab Wear)
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23- New York Times
A somewhat recent case…
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Proper PPE
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Common complaint: “But for what I’m doing, it’s not dangerous. Why do I have to follow this rule?”
Answer: Safety procedures are built to avoid judgement calls by individuals. People get tired, bored, lazy, lax, forgetful… 100% observance of rules 100% of the time removes human error.
This is especially important for young, inexperienced students in a busy, exciting environment.
Why aren’t there exceptions to the rule?
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Lathe, mill, drill press (trained in-person)Bandsaw (trained in-person)Hand drills, Dremels, other power toolsSoldering iron, hot glue gun, heat gunHand saws, hand toolsRaw materialsTripping hazards, electrical cords, blocked aisles, other personnelEquipment fall risksElectrical shock
Hazards in the IDEA Lab
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Your actions have the potential to affect those around you
Consider the radius of effect• Where is/are the debris/dust/chips going?
• If you loose purchase/miss/etc. what’s in the way?
Every tool is a potential hazard – treat it as such
General Awareness
This is not a hammer
it is a thumb-detector
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1. Fire extinguishers (2), first aid (2), eyewash station (1)• Know where they are!
2. Safety glasses are always available
3. In case of injury: If serious – call GTPD @ 404.894.2500 or 911 on a landline
• If not serious, utilize the first-aid resources immediately available Report the incident immediately to the TA on-duty
• ALL incidents and near misses, large and small, should be reported –culpability is not the goal here, improving safe practices is
Emergency Procedures in the Lab
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Fire Ext.
First Aid Kit
Eye Wash Station
• Do not enter without closed toe shoes (classroom included)
• Leave all coats and bags at the front of the lab
• Acquire safety glasses immediately
• Know where emergency equipment is located
LAB ENTRANCE
CLASSROOM
EMCO MILL
LATHES MILLS
SAFETY GLASSES
TA STATION
IDEA Lab LayoutAnd Critical Equipment
Note: IDEA lab/classroom are video-monitored
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Proper Lab Wear
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Loose clothing and other hazards
Proper Lab Wear
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Distracting an operator
Using devices while a machine is on
Tripping hazards
Two operators on one machine
Lab Use and Safety
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Only use drills to hold tools meant for drillsUtilize proper work-holding
• Never hold your work by hand ALWAYS use clamps• Always be aware of where your and other hands are – NEVER behind a workpiece
Use a sacrificial backing piece• Prevents tear-through, damage to work tables
Apply light force onlyPut the drill into neutral when not in useSmoke, excessive/irregular noise, heavy vibrations, etc. are all signals to stop and figure out what is wrong
Hand Drill Safety
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Hand Drill Safety
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Use the proper tool for the job• Cut-off wheels and grinding stones are for steel ONLY
• Burrs, sanding attachments can be used for wood
Need to cut steel?• You’re going to make sparks
Take it to the machining mall
Guidelines for drills apply
Dremel Safety
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38IDEA Lab
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Bandsaw Safety
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Hand tools do have the potential for dangerAlways be conscious of how much load you are applying – never apply so much load that if you lost grip or slipped you would be out of controlWho’s in the path of danger?Soldering irons, heat guns, hot glue guns• Always assume hot• Never use to melt materials they are not designed for• Do not place near paper, cloth, other flammables• Unplug when not in use
Hand Tools, Tools that Generate Heat
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Fire hazard
What happens when the saw slips?
Hand Tool Safety
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All electrical equipment for mechatronics in ME2110 is <12V DC• There is high-powered equipment elsewhere in the lab
Smoke? Unplug main-power.
Treat all circuits as if they’re live
Pay attention to wires and connection points• Minimize exposed wiring (use heat-shrink, electrical tape, proper technique)
• Keep an eye out for fatigued or cracking wiring sheaths and cables – replace as needed
Do not leave devices running indefinitely
Electrical Safety
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Detailed safety training in studio
GWW official documents (link)
Machine Tool Safety
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… is a safe, happy, efficient shop.
Professional courtesy
Safety – trip/slip hazards, flammables• Always use cable drops directly above your workspace – stretching cords
across the room is a tripping hazard
Searching for tools is a waste of everyone’s time
In industry, organization and cleanliness are strongly linked with quality control, efficiency and safety• 5S, TPS, aerospace shadow-boxing, etc.
A Clean Shop…
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Please report broken and damaged tools!
This is a learning environment and mistakes are expected. You will not be in trouble for reporting honest mistakes or
freak failures.
Help keep the lab well-stocked, safe, and help staff identify unsafe machines.
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We are here to help!
If you don’t know, ask! If you’re unsure, ask! This is a learning environment, TAs and instructors are here to teach, not to scold
You will not be marked-down or in any way discouraged from asking questions
Failure to follow instructions from lab staff, or the posted lab safety rules is not optional• In severe cases, students can be asked to leave, or
barred from using lab equipment
Lab Staff
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Stay safe, and have fun out there!
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Understand the IDEA Laboratory equipment and tools
Understand safety policies for laboratory use
Identify hazards in manual fabrication processes
Use equipment safely and follow shop rules and procedures
Learning Objectives