HW1: Turning,Milling & Drilling Processes

Lathe Turning

Lathe Turning

A metal cutting process used for the generation of cylindrical surfaces. Normally the workspace is rotated on a spindle and the tool is fed into it radially, axially, or both ways simultaneously, to produce the desired surface

Work holding methods

“Held in a chuck”

“Held in a collet”

“Held between Centers”

Held in a chuck

When a workpiece is _________, it is clamped in a rotary chuck containing 3 or 4 jaws for security

Held in a collet

When a workpiece is ______, it is held in precision cylindrical bushings

Held between centers

When a workpiece is_______, it is supported between 2 pointed mandrels.

-Used for long slender pieces

True

T or F: All standard tool holders are designed to cut with the cutting edge or point located on the center line of the machine and workspace

Name all of the Locations

1-Headstock

2-Spindle

3-Ways

4-Tool Post

5-Cross Slide

6-Carriage

7-Bed

8-Tailstock

Turret Lathe

Engine Lathe

Two Different Types of Lathe

Turret Lathe

Represents First step towards high production turning machines

Replaces the tail stock and tool post compound assembly with tool-holding turrets

Includes “skill of the worker”, inexperienced workers can reproduce identical parts

Higher production needs

Engine Lathe

Lower production needs

Skilled operator and requires time to produce identical parts

Milling

A process of generating machined surfaces by progressively removing a predetermined amount of material or stock from the work piece which is advanced at a relatively slow rate of movement or feed to a milling cutter rotating at a comparatively high speed

End Milling

The use of the end and periphery of the cutting tool to create a shoulder or pocket

Face Milling

The use of the end or tip of the cutting tool to create a flat work piece surface

High speed steel

From what material are most solid milling cutters and drills made?

Vise

What is the most common type of work holding device for a milling machine?

True

T or F: Drilling accounts for the majority of holes produced in industry today

Name of the components of the drill

1-Shank Length

2-Flutes

3-Lip

4-Drill diameter

Name of the components of the Mill

1-Motor

2-Overarm

3-Column

4-Base

5-Knee

6-Sadde

7-Table

8-Spindle

9-Quill

Facing

Surfaces are typically positioned perpendicular to the axis of the workpiece in the “___” operation.

-Dominated by racial feed

Knurling

In an operation known as “_____,” a regular cross-hatched pattern is produced in work surfaces through metal forming

Turning

The generation of any cylindrical surface with a single point tool is referred to as “______.” In this operation, the direction of the feeding motion is predominately axial with respect to the machine spindle.

Chamfering

For a “_____” operation, a tool cuts the corner of a cylinder at an angle

Threading

During a “_____” operation, external or internal threads are achieved by feeding a pointed tool linearly across the outside or inside surface of a rotating part

Drilling

In the “_____” process, a hole is produced by feeding a drill into a rotating workpiece along its axis

Boring

A single point tool is def linearly and parallel to the axis of a workpiece to enlarge a hole made by a previous process in the operation known as “_____”

Parting

For a “_____” operation, the end of a part is cut off by feeding a tool radially into a rotating workpiece at a particular location along its length

Profiling

In a “______” operation, both modes of tool feed are simultaneously desired to create tapered and contoured surfaces