Material removal through a cutting action that involves shear deformation of work material to form a chip. As a chip is removed, a new surface is exposed.
Either the only operation or the finishing operation.
What is Machining?
100
These chips are formed due to brittle materials, low cutting speeds, and high tool-chip friction
What is a discontinuous chip?
100
v-primary motion of the tool
What is the cutting speed?
100
Measured perpendicular from the vertical, usually between 0 and 20 deg.
This is the angle of the cutting tool.
What is a rake angle?
100
A single point cutting tool removes material from a ROTATING work piece to form a cylindrical shape. Cutting tool moves inward and needs to move down linearlength as the work piece rotates, otherwise only one layer of material would be removed...
*** what shape is the removed material?
What is turning?
200
Various energy forms OTHER than sharp cutting tool removal.
Ex. laser cutting, chemical milling...
What is a non-traditional process?
200
These chips are formed due to ductile materials, high cutting speeds, and low tool-chip friction
What is a continuous chip?
200
f-secondary motion, motion of the work piece relative to the tool
What is the feed?
200
Measured from the horizontal. Important that this back angle is not flush with the piece in order to eliminate friction.
What is the relief angle?
200
Used to create a round hole by means of a rotating tool with TWO cutting edges.
What is drilling?
300
This is the material removal by hard, abrasive particles, ex. grinding.
**small grains form all over the cutting tool
What is an abrasive process?
300
These chips are formed in ductile materials, tool-chip friction causes part of chip to stick to rake face.
What is a Built Up Edge (BUE) chip?
300
d-penetration of tool below the original work surface
What is the depth of cut?
300
This usually had one dominant cutting edge with a point that is usually rounded to form a nose radius.
What is a single point cutting tool?
300
This cut completes the part geometry. Final dimensions, tolerances and finish. LOW speeds and depths, HIGH cutting speeds.
What are the characteristics of a Roughing Cut?
400
It is wasteful of material (chips generated)
It is time consuming (multiple cuts for accuracy)
What are the disadvantages of machining?
400
This chip has a semicontinuous/saw-tooth appearance. Cause is due to alternating high and low shear strain.
What is a serrated chip?
400
RMR
What is the material removal rate?
400
This tool has more that one cutting edge, with the motion relative to the work achieved by rotating.
ex. drilling and milling.
What is a multiple cutting edge cutting tool?
400
In this process, the cutter axis is parallel to the the surface being machined (the cutting edges are on the outside periphery of the cutter).
What is horizontal milling?
500
Because a variety of materials can be machined. A variety of shapes are possible, it provides food dimensional accuracy and surface finish.
Why is machining important?
500
This cut removes large amounts of material. Some material remains for finishing cuts. Cuts at HIGH feeds and depths, LOW speeds.
What are the characteristics of a Roughing Cut?
500
linear speed, depth of cut, feed rate
**fluid (lubricant, coolant, flushes away chips)
What are the 3 conditions of metal cutting?
500
The process of using a rotating multiple-cutting-edge tool that moves across work piece to cut a plane or straight surface.
What is milling?
500
In this process the cutter axis is perpendicular to the surface being milled. There are cutting edges on both the end and outside periphery of the cutter.