Machine Shop Midterm
Edge finder tip is ____ in diameter
0.1
The three types of taps are
7, 10, 14
Internal threads are made with a
tap
A micrometer caliper measures to ____ mm, or ______ with a vernier scale
0.001 or 0.01 mm
When was the American National Thread System adopted?
1911
Computer controlled machining got its start during ______s as numerical control.
1950s
____ jaw universal chuck is used to hold large diameter work
3 jaw
A lip clearance of ____ to ___ degrees is satisfactory for most drilling.
8 to 12
____, _____, and ______ are used to identify steel.
AISI/SAE, Color coding, spark test
The Aluminum _____ _____ system is used to classify aluminum alloys.
Association Designation
_____ is a manufacturing process for machining flat, round, and countered surfaces.
Broaching
____ simulate the CNC program graphically
Cam software
This material is used for heavy roughing of most materials
Carbide
____ steel is a common types of steel made of iron, various alloying elements with carbon as the major allowing agent.
Carbon
The _______ system is the basis of CNC programming.
Cartesian coordinate system
Sometimes low carbon steel is ______ to produce a very hard outer steel and retain the soft middle.
Case hardened
An abrasive cutoff saw, or ____ saw, uses a rapidly revolving abrasive wheel.
Chop
Use the ____ to taper turn a part.
Compound rest
_______ is the operation that cuts a chamfer in a hold to permit a flat-headed fastener to be inserted with he head flush to the surface.
Countersink
______ or EDM is a process that can work tough, hard, fragile, or heat-sensitive metals to close tolerances.
Electrical discharge machining
_____ or ECM uses electricity to remove metal from the work.
Electrochemical machining
The milling machine can do ____ and ____ milling.
Face and peripheral
____ codes are preparatory codes that control the positioning of the machining cutter relative to the path the cutter takes, offsets from a defined path, and temporary reference coordinates.
G-codes
_____ is the controlled heating and cooling of a metal or alloy to obtain certain desirable changes in its physical characteristics.
Heat treatment
____ (HSS) makes deeper cuts at higher cutting speeds than regular tool steels
High speed steel
______ are the most versatile of the cutter materials
High speed steel
________ cutting tools are used for turning and milling operations
Indexable insert
______ is the process of forming horizontal or diamond shaped serrations on the circumference of the work.
Knurling
____ ___ is the term used to describe the location and marking of lines circles, arcs, and points for drilling holes or making cuts
Lay out
_____ steels, or mild steel do not contain enough carbon to be harmed.
Low carbon
The _____ command causes the machine cycles to stop.
M00
Which metric thread is closest to 3/8 -16
M10 x1.5
_____ ____ is the location of the table and spindle given the cartesian coordinates.
Machine Home
____ are CNC milling machines equipped with an automatic tool changer.
Machining centers
____ is the lights of structural metals.
Magnesium
The science that deals with systems of measurement is called...
Metrology
____ is added to steel to make it stronger
Nickel
______ metals are metals that do not contain iron as their basic ingredient.
Nonferrous
_____ saves time when programming a CNC program
Offline programming
____ are used to raise work above the vise base
Parallel
_____ produces holes that are extremely accurate in diameter and have a fine surface finish.
Reamer
_____ cycles remove large amounts of material using a rough cutting operation.
Repetitive
___ and _____ tooth blades are best for cutting aluminum, and other non ferrous materials.
Skip and hook
______ or process annealing is done to remove internal stresses that have developed in parts that have been cold worked, machined or welded.
Stress relieving
____ wrenches are used when fasteners must be tightened to pithing certain limits to prevent stress and strain on the part.
Torque
Spindle motion is assigned to the __ axis, which is vertical
Z
The advantage of a turret-type CNC lathe are its....
accuracy and speed
What are the three types of stainless steel?
austenitic, martensitic, ferritic
Remove all ____ and _____ from stock before starting layout work.
burrs and sharp edges
Carbon steels are classified according to their _______
carbon content
Excessive overhand of the compound rest rest causes _____
chatter
Stainless steel contains ____ to keep it corrosion resistant.
chromium
The ____ is used for holding work in the lathe
chuck
The _____ permits angular tool movement
compound rest
A _____ is used to enlarge the drilled hole to the proper depth and machine a square shoulder on the bottom to ensure maximum clamping of the fastener.
counterbore
The _____ on a lathe permits transverse tool movement
cross feed
A telescoping gauge is used with a micrometer to ...
determine internal dimensions
The ___ is a precision tool that will locate the edge of the work in relation to center of the spindle with 0.0002 accuracy.
edge finder
Cutting fluids carry away heat, act as a lubricant, flush away chips, and influence the ____ quality of the machine surface.
finish
In the absolute positioning system, all coordinates are measured from a _________
fixed point of origin
Most drills are made of ____ or ___ steel
high speed or carbon
The ____ ___ saw, also called the cut off machine, has greater precision, faster speed, lower heat and less waste than the power hacksaw.
horizontal band saw
Which steel can be heat treated the most?
hot rolled steel
US conventional units of measure are
inches and feet
The two types of micrometers are:
inside and outside
Never blow chips out of the _____ machine.
milling
When using a tap drill, the drill used to made the hole before adding threads, the hole should be drilled to the ____ diameter
minor
Drill sizes are expressed in ...
numbers, letters, inches, fractions, and metrics
a micrometer or micron is ____ of a meter
one-millionth
A ___ makes drilling a large hole much easier
pilot
While broaching multi toothed cutting tool is ____ or _____ across the work.
pushed or pulled
In a heat treatment process the metal is heated then ____ rapidly.
quenched
A _____ point is used to establish a program zero position.
reference
A ____ produces fine lines that layout the cuts on a part.
scriber
Oxidation of carbon steel can be avoided by wrapping the part in...
stainless steel foil
A ____ tooth blade is best for cutting most ferrous metals
standard
Never check your part while the machine is ______
still running
A ____ is a large piece of granite to measure objects.
surface plate
Lathe size is determined by the ____.
swing and length of the bed
To drill on a lathe, mount the drill in the ______
tailstock
Threads are started with a ____ tap, then finished with a ____ tap
taper, plug
The minor diameter of a thread is
the smallest diameter of a thread
Screw pitch gauge is used to measure the number of ______ on a screw.
threads per inch
The ____ states you should always keep 3 saw teeth in contact with the part
three tooth rule
Use slower cutting speeds with cutting _____
titanium
The ____ is used to mount the cutting tool
tool post
____ pattern determines the efficiency of the blade
tooth
Three types of saw blades used to cut metal are
toothed, friction and abrasive
_____ is the hardest known metal
tungsten carbide
A CNC lathe machine was equipped with an automatic tool changer known as a _________
turning center
You can machine on a ____ turning center.
two axis
Cutting speed for a reamer should be about _____ of a similar sized drill
two-thirds
The working direction of the mill in the shop is ______
veritical
