Finals for Manufacturing Technology (not finished)

Never attempt to part stock that is held ____.

mounted between centers

What fixed gage can be used to check a threaded hole?

...

What is a taper?

...

When using ____ positioning, the coordinates of all positions will be referenced from the beginning.

Absolute

Name one positioning system and describe it.

Absolute - references all positions relative to origin Incremental - specifies distance from current position to the next.

What is the first step that should be performed before using a lathe?

Do not attempt to operate a lathe until you know the proper procedures and it's been checked for safe operation by your instructor.

____ is a natural abrasive.

Emery

There are five important uses of screw threads, name one of them?

Important uses of screw threads is the ability to have the ability to close work.

A(n) ____ type chuck is normally fitted in the tailstock for drilling.

Jacobs

Why is knurling done?

Knurling is done to give the work a raised diamond pattern which is used for grip.

The ____ permits traverse tool movement.

cross-slide / cross slide

Parting is the operation of ____.

cutting off material after it has been machined

The ____ of cut refers to the distance the cutter is fed into the work.

depth

____ is the distance the cutter moves longitudinally along the ways during a single revolution of the work.

feed

The spiral grooves that run the length of a drill body are called ____.

flutes

In most lathe operations, you will be using a single-point cutting tool made of ____.

high-speed steel

After the machine has been properly turned on, most machines require a reference return to the machine's origin, or ____ position of the MCS.

machine home

Spotfacing is a machining operation that ____.

machines a circular spot on a rough surface for a bolt head or nut

CNC mills with an ATC are called ____.

machining centers

Symbols, lines, and figures are employed to give drawings ____.

meaning

The lathe operates on the principle ____.

of the work revolving against the controllable cutting tool

Plier size indicates the ____.

overall length of the tool

Dimensions placed between parentheses are _____ dimensions.

reference

The ____ is fitted to the carriage and slides along the ways.

saddle

Drawings made other than actual size are called ____ drawings.

scale

____ cutters are held in the machines with collets or special sleeves.

shank

A(n) ____on a workpiece is the point where the diameters change.

shoulder

Reaming is an operation that will produce a hole that is ____.

smooth and accurate

Assembly and ____ drawings provide the information necessary to correctly fit the various parts together.

subassembly

Lathe size is determined by the ____.

swing and length of the bed

Tolerances are ____

the amount you can be over or under when it comes to measurements

Round and hexagonal stock will center automatically in a 3-jaw universal chuck because ____.

the jaws move simultaneously

When cutting threads with a die, the material diameter should be ____ the desired thread diameter.

the same size as

On the plain milling machine, the worktable has ____ axes of movement.

three

Where possible, work should be set up in the vise so the cutting can be ____ (toward/away from) the solid vise jaw.

toward

When a CNC lathe is equipped with an automatic tool changer it is called a ____.

turning center

The ____ end mill is used when the cutter must be fed into the work like a drill.

two-flute

The ball-peen hammer is classified according to the ____.

weight of the head without the handle

The distance from the MCS to the WCS is called ____ offset.

work

Which machine mode is used to run the machine through a continuous machining cycle?

...

Why is boring done?

...

What is wringing?

....

Precision measurement refers to measurement beyond 1/64 or 1/100 of an inch, 0.5 (1/2) millimeter, and ____ degree(s).

1

The spindle speed when performing a parting operation is about ______________________________ the speed used for conventional turning.

1/3

The included angle of a drill point sharpened for general drilling is ____degrees.

118°

What is a blind hole?

A blind hole is a hole that cannot be seen and doesn't go through the work.

What does a detail drawing contain?

A detail drawing contains all dimensions and all instructions to an object or part.

What is a draw-in bar?

A draw-in bar is used on most vertical and horizontal milling machines. It fits into the spindle and screws into the arbor or collet and firmly hold the spindle.

What is a fly cutter?

A fly cutter is a single point tool that is used as a face mill and is designed to machine flat surfaces.

What is a modal code?

A modal code is a code that remains running until canceled.

What is a surface plate?

A surface plate, made of granite, is used as a solid surface for measuring but not for hammering or putting delicate tools on.

What does ANSI stand for?

ANSI stands for American National Systematic Institute.

External ragged threads are usually caused by ____.

All of the above

Which of the following actions are considered dangerous when operating a lathe?

All of the above - Using compressed air to clean the machine, Wearing loose clothing and jewelry, and Measuring with work rotating

A groove is cut at the point where the thread is to terminate and serves to ____.

All of the above - end the thread, provide a place to stop the threading tool after making a cut, and permit a nut to run up to the end of the thread

The spiral grooves in a drill body are used to ____.

All of the above - form channels through which the chips can escape from the hole, curl chips for easier removal, and help form the cutting edge of the drill point

The tailstock ____.

All of the above - is necessary to support long work being turned, is essential for drilling operations on a lathe, and permits taper turning to be done

When using an adjustable wrench, ____.

All of the above - use the smallest wrench that will fit the fastener, the movable jaw should face the direction the fastener is rotated, and adjust the jaws to fit snugly on the fastener

____ interpolation motion causes the cutter's path to travel in an arc.

Circular

To get the best cutting performance, a cutter bit must have a keen, properly shaped ____.

Cutting edge

____ indicates the distance the work moves past the cutting tool per minute.

Cutting speed

When using TNRC, the tool tip ____ orientation must also be entered in the geometry offset page.

Dimension

At the very end of each block is a semicolon (;) character is called a(n) ____ character.

End of block

____ is the distance the cutter moves longitudinally along the ways during a single revolution of the work.

Feed

What does the term feed indicate in drilling?

Feed indicates the rate that the work is going into the drill.

____-codes prepare a machine to engage in a particular mode for machining.

G

List one G Code and describe it's function.

G0 is rapid traverse.

____ blocks are extremely accurately sized blocks with very smooth surfaces that can be used for part inspection or to check the accuracy of other precision measuring tools.

Gage

What is geometric dimensioning and tolerancing?

Geometric dimensioning and tolerancing is the precision dimensions.

Once the tool measurement has been determined, the tool offset measurements are stored in the machine's ____ offset page.

Geometry

There are numerous advantages to band machining, list one of them?

Greater precision and less waste.

The ____ positioning system specifies a distance from the current position to the next position instead of a location related to the origin.

Incremantal

____-codes are used to turn on and off miscellaneous (auxiliary) functions.

M

List two M Codes and describe their function.

M8 is to turn the coolant on and M9 to turn the coolant off.

The ____ is a precision measuring tool that uses a very accurate screw thread to perform measurement.

Micrometer

A shoulder results when diameters change. There are four types of shoulders, name one of them.

One type of shoulder is angular.

There are five ways of machining tapers on a lathe, name one of them?

One way to machine tapers on the lathe is using a tool attachment.

____ gages are cylindrical rods with very accurate diameters that can be used to check hole dimensions.

Pin

____ traverse is designated by the code G0.

Rapid

Angular cuts can be made using the compound ____.

Rest

____ gages are used to inspect external diameters similar to the way pin or plug gages are used to check internal diameters.

Ring

A machinist can compare some surface finishes with required specifications by employing a surface ____ standard.

Roughness comparison.

What are the three parts of a CNC program?

Safe start, material removal, and program ending

____ tools have two equal-sized cylinders, called rolls, mounted near each end.

Sine

In ____ squares, because of their solid construction, the 90-degree surfaces between the blade and the beam are much more precise.

Solid

Linear interpolation produces a(n) ____ line between two points.

Straight

What do straight edges do?

Straight edges are put against a flat instrument to determine if they have gaps.

A telescoping gage is shaped like a(n) ____ and has two arms that expand when the locking screw is loosened.

T

What cutters are normally used on a vertical milling machine?

The cutters that are normally used on a vertical milling machine are side cutters, angle cutters, face mills, and end mills

List four operations of which the vertical milling machine is capable of performing.

The four operations of which the vertical milling machine is capable of performing are milling, boring, drilling, and reaming.

What are the three principal parts of a twist drill?

The three principal parts of a twist drill are flutes, grooves, and size.

Why should too much overhang be avoided when mounting a tool holder for machining?

Too much tool overhang should be avoided when mounting a tool holder because it can cause tool to chatter or vibrate and it can damage it and the work.

There are four types of cuts or operations that vertical band machines are capable of, list two of them?

Two operations that a vertical band machine is capable of are sawing and parting.

____ are often used to support round stock for drilling.

V- block

____ offsets are used when a size adjustment needs to be made after a given tool has been satisfactorily producing parts for a while.

Wear

____ offsets may be used to compensate and adjust for wear as the tool is used during production.

Wear

Reaming is an operation used to produce a hole ____.

accurate in diameter and improved surface finish

The ____ contains the drive mechanism to move the carriage along the ways using hand or power feed.

apron

The ____ controls and supports the cutting tool.

carriage

Mount work solidly and as close to the vise as practical for sawing, because if not, ____.

chatter and vibration will dull the blade

A ____ is a tool that shows small movements by displaying them with a needle on a graduated dial face.

dial indicator

Milling head perpendicularity can be checked with a(n) ____

dial indicator

Drill press size is determined by the largest ____.

diameter work that can be drilled on center

A proper drawing includes all ____ in proper relation to one another needed to make the part.

dimensions

The cutting edges of a(n) ____ milling cutter are on the circumference and the end.

end

Files are classified by their shape. File shape is determined by the ____.

general outline and cross section

A vise should be mounted far enough out on the bench edge to ____.

permit clamping long work in a vertical position

Counterboring is a machining operation that ____.

prepares a hole to receive a socket or fillister head screw

Countersinking is a machining operation that ____.

prepares the hole to receive a flat head screw

A twist drill works by ____

rotating against the material with sufficient pressure to cause penetration

____ cuts are made to reduce work diameter to approximate size.

roughing

A machinist can compare some surface finishes with required specifications by employing a surface ____ standard.

roughness comparison

Formula for calculating RPM

rpm=4xCS/D

When facing stock, a square shoulder "nubbin" of face material results if the cutting tool is ____.

slightly below center

A(n) ____ cutter has the shank and body made in one piece.

solid