Intro to Man

The amount of material removed in lapping is usually less than _____

0.001"

The milling process will produce a surface finish with a surface roughness measurement of 60 to ___ microinches.

150

Which of the following describes the ultrasonic machining process?

A harden steel tool is vibrated at high frequencies (>20,000 Hz) with an small amplitude (~0.003") with an abrasive slurry pumped between the materail being machined and the tool as a process to remove material.

Identify the best type of cutter that would be used for each of the following milling operations in a vertical milling machine. (some answers maybe used more than once)

Deep slots with straight side walls endmill finishing the top surface of a work piece face mill producing a groove with a 1/8" diameter concave bottom ball end mill bearing pocket in gearbox housing form cutter producing a pocket in a workpiece end mill Producing a flat-bottom groove in the surface of a part end mill

Electrochemical Machining is a deplating process using high DC voltage, high current for the process.

False

The honing process uses stones with a grit size of 1200 or more particles per inch.

False

Which of the following is a function of the dielectric in the electical discharge machining process?

Flushing agent

The numeric control programming language used for computer-aided manufacturing (CAM) is called

G-Code

Which of the following statements is false regarding thread grinding?

Only coarse threads can be produced.

Which of the following is a correct statement for rapid prototyping?

Rapid prototyping is an additive manufacturing process that can produce parts from various materials using various processes.

What device is commonly used to quickly produce external threads on screw machines?

Self-opening die head

What is most commonly used to produce internal threads?

Tap

Which of the following statements correctly descibes the purpose of the mask in chemical machining?

The mask is applied to the area of the part that is is desired to not remove material from the part.

In centerless grinding, the work piece must be round and not include flats or keyways.

True

The use of a spiral fluted tap is to force chips up (rearward) and out of a hole during the threading process.

True

Which of the following surface grinding machines requires the grind wheel diameter to exceed the width of the part being abrasively machined?

Vertical spindle, reciprocating table

Which of the following surface grinding machines is primarily used in production operations?

Vertical sprindle, rotary table

Which is the most frequently used delivery system for abrasives?

bonded

By using extremely hard materials for abrasives it is possible to machine such materials as ceramics .

ceramics

The teeth of an end mill cutter are located on the ___.

circumference and the face of the cutter

Friability refers to the ability of the abrasive material to ____.

fracture, producing new, sharp edges

Slab milling is typically performed using what type of knee-and-column milling machine?

horizontal milling machine

In the slab milling process, the finished surface is _____ to the axis of rotation of the cutter and is normally performed on a ____ spindle milling machine.

parallel horizontal

Threads are frequently produced in _____ products by casting or molding where excellent surface finish can be realized.

plastic

In centerless grinding, the regulating wheel controls _____ in the grinding process.

rotating speed and axial feed of the work piece

What is the milling of two parallel surfaces with side cutters called ?

straddle milling

The structure of a grinding wheel refers to ___.

the spacing of the abrasive grit in the wheel

End milling, drilling, and boring is typically performed using what type of knee-and-column milling machine?

vertical milling machine