Tooling u test 1

What standard allows CAD data to be translated back and forth between different vendors' CAD systems?

Initial Graphics Exchange Specifications (IGES)

Which of the following codes occurs before cutting takes place in a toolpath?

S codes

Which step of part program creation should happen before the part programmer determines the sequence of cutting operations?

Select the appropriate machine.

Which trigonometric function of a right triangle is the side opposite the angle divided by the side adjacent to the angle?

Tangent

In what form are toolpath instructions input into the CNC machine? Toolpath instructions are input into the CNC machine as a:

Part program

Which of the following describes the sequence of operations necessary to machine a part?

Part program

Which of the following is used by CNC machines to machine workpieces?

Part program

Which step of part program creation happens directly after the part programmer determines the appropriate sequence of operations? The part programmer:

Plans the workholding and tooling.

During what stage in the CAM process are coded machine instructions created and then converted into machine control data specific to a CNC machine?

Post-processing

What CAD/CAM function creates route sheets, documents that guide and organize steps in manufacturing parts?

Process planning

Why do most cutting operations on the lathe begin with a facing cut?

Program zero is usually located on the face of the part.

Which of the following is true about computer-aided manufacturing (CAM)? CAM:

Asks the programmer a series of questions to create a program.

What is the purpose of adding an approach to a cut?

It increases safety.

What allows designers to see how multiple parts move together?

3D assembly modeling

A programmer performs the following calculations to find a set of X and Y axis coordinates: Connect X and Y axes to hole center to form right triangle with radius as hypotenuse, where angle B is 60 degrees. Find the sine of B to find the X axis distance. Find the cosine of B to find the Y axis distance. For what feature is the programmer finding coordinate locations?

A hole in a bolt-hole pattern

In CAD, what is a hard copy? A hard copy is:

A physical part drawing that is printed on paper.

What does an N code communicate?

Block Number

What coordinate system is used to calculate CNC mill movements?

Cartesian

Which of the following refers to the use of computers to create scale-model drawings of parts?

Computer-aided design (CAD)

Which cutting variable speed mode is used when turning?

Constant surface speed

Which statement is true about CAD/CAM software? A part programmer uses CAD/CAM software to:

Create toolpaths for complex parts.

A programmer writes a part program to cut a 4.0 in. (101.6 mm) by 5.5 in. (139.7 mm) by 1 in. (25.4 mm) pocket into a workpiece using an end mill with a diameter of 0.5 in. (12.7 mm). After the program completes, the programmer finds that the pocket is 0.25 in. (6.35 mm) longer and wider than he had intended. What offset did the programmer forget to set?

Cutter radius compensation

What is the name of the storage method used for CAD/CAM data?

Database

An operator is using an end mill that is 4.000 in. (101.600 mm) long with a 1.000 in. (25.400 mm) diameter for a pocket milling operation. Given the measurements of the end mill, what issue could occur?

Deflection

What is the function of a G code? A G code:

Describes a toolpath's cutting operation.

When creating a part program, which of the following should the programmer do before recording the sequence of cutting operations?

Determine Program Zero

What is the first step in the CAM process?

Determining tools and workholding

Which of the following will correctly calculate the X axis location for the center of a concave full arc, when using TNRC?

Double the arc radius and add it to the value of X at the start of the cut (X at arc center = 2 x radius + X at start).

Which of the following is the correct order of canned cycles necessary to program tapped holes?

Drilling, Peck Drilling, and then Tapping

What is the purpose of the Standard for the Exchange of Product Model Data (STEP)? The purpose of STEP is to:

Exchange CAD/CAM data internationally.

Which word in a part program communicates the feed of a cutting operation?

F code

A standard twist drill has a 0.50 in. (12.70 mm) diameter. What trigonometric calculations can be used to find the accurate drill depth?

Find the length of the shortest side of the right triangle, side b, that is formed at the drill tip, using the ratio tan 59°=0.25 in. (6.35mm)/a.

What is a template? A template is a:

Format that repeats similar blocks of code at the beginning of each toolpath.

Which G code causes rapid positioning?

G00

For a program in absolute coordinate mode, which program block moves the tool in a straight line vertically to the center of the hole immediately above the current location? Image

G01 Y1

Which G code causes clockwise circular interpolation?

G02

Which of the following program blocks indicates that a canned cycle should run through program blocks 110 through 120?

G71 P110 Q120 U .02 W .005 D1250 F.012

Which of the following G codes indicates the necessary speed mode for drilling?

G97

When using the arc center method, which code locates the X axis coordinate of an arc's center point?

I code

In a turning program, how does the block G01 X1.375 Z-.048 move the cutting tool? G01 X1.375 Z-.048 moves the cutting tool:

In a line to a 1.375 in. diameter and 0.048 in. into the face.

During a peck drilling cycle, what does the R.25 stand for? R.25:

Instructs the machine to back the tool out 0.25 in. in front of the part.

In modern CAD processes, parts are designed:

Internally, using the design abilities of the CAD software itself.

Which of the following do standards dictate? Standards dictate the:

Language used by CNC machines and part programs.

Which of the following program blocks contain the coordinates that determine the cutting toolpath for the execution of this canned cycle? Image

N110 through N120

What term describes the sequence of commands necessary to machine a part?

Part Program

What is the most common location for program zero on a symmetrical part?

Part center

A series of G codes written one after the other with the object of producing a completed workpiece is called a:

Part program

Which of the following actions is necessary to prevent program error from causing serious problems?

Proving out a part program

What is necessary to prevent serious problems from occurring due to program errors?

Proving out.

Which of the following codes does a peck drilling cycle require?

Q code

A programmer wants to use arc-in and arc-out motions to create a circular cut. Which of the following would be best to accomplish this?

Radius method

Which of the following is a measurement of speed in a milling program?

Revolutions per minute

What must a programmer do to calculate the X-axis location of the start of the partial arc shown? The programmer must find the length of

Side a, double it, and subtract that amount from the workpiece face diameter.

What steps are necessary to find the Z axis coordinate for the end point of the partial arc shown? To find the Z axis location for the end of the partial arc, find the length of

Side a, then subtract it from the arc radius.

What trigonometric ratio for an angle is the side opposite of an angle divided by the hypotenuse?

Sine

An end mill is cutting a pocket into a workpiece. What are the likely toolpath movements that will create this pocket?

Start at pocket center, make linear cuts in the following pattern: +Y, -X, -Y, +X

What is the purpose of a spot drill? A spot drill:

Starts and locates holes.

What is the role of a template in a part program? A template:

Stops incorrect modes from other part program sections from affecting a toolpath.

What type of geometric model consists of planes that fit together to form a hollow object?

Surface model

Which of the following codes is a startup code?

T codes

Which of the following program blocks causes a tool change?

T18 H18 M06

Which of the following statements is true about the subprogram in this section of G code? Image

The M98 P7004 block executes the subprogram.

What is the difference between the R method and the I and K method of programming arc motions?

The R method uses the radius size, while the I and K method uses the arc center coordinates.

What is step-over? Step-over is:

The portion of the cutter that is engaged in the cut.

The use of CAD/CAM reduces cycle time. Cycle time is:

The total time from the beginning to the end of your process

What is the function of codes G41 and G42 in cutting an arc into a part?

They tell the control whether the tool is to the left or right of the feed direction.

In a face milling toolpath, how does the block X3.39 Z0.05 F30.8 move the cutting tool? X3.39 Z0.05 F30.8 moves the cutting tool:

To the right to 3.39 inches and 0.05 inches above the part surface

What is the best interpretation of the following codes in this boring operation? Image

Tool 4 will cut in CSS mode at 600 sfm.

In addition to the dimensions of the radius itself, what information must a programmer know in order to utilize tool nose radius compensation?

Tool orientation and programmed path

What is the series of program blocks that describes the movement of a single cutting tool?

Toolpath

Which of the following is the series of movements made by a single cutting tool?

Toolpath

What does a T code communicate?

Which tool to use

What component of a part program combines an address letter and a number?

Word

A programmer is determining the X axis locations for a face milling operation using a cutter with a 2.000 in. (50.800 mm) diameter. X= -3.500 in. (-88.900 mm) at the left edge of the workpiece. The cutter must start to the left of the workpiece, with a 0.150 in. (3.810 mm) approach. What is the X axis location that should be programmed for the start of the cut?

X = -4.650 in. (-118.110 mm)

What word in a part program tells the machine where to perform a cutting operation?

X code

A programmer is calculating the Z axis coordinate location for the total drill depth for a through hole on a 2.0 in. (50.8 mm) thick part. The tip length of the 1.0 in. (25.4 mm) diameter drill is 0.3 inches (7.62 mm), and it will require a 0.05 in. (1.27 mm) clearance. What is the correct Z value to program for this hole?

Z = -2.35 in. (-59.69 mm)