Term
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Definition
| ALPHA, The angle that the tool makes with respect to a vertical from the workpiece. p495 |
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Term
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Definition
| Enlarging a hole of diameter D1 to diameter D2. Can be done with multiple cutting tools. (picture on 485) |
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Term
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Definition
| A cutting too moves into a stationary workpiece (picture on 482) |
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Term
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Definition
*This is a self-excited vibration that is caused by the closed loop force displacement response of the machining process p504
-self-excited vibration that is caused by the closed loop force-displacement response of the machining process. p504 |
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Term
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Definition
| The local high temperature and extreme pressure in the cutting zone cause the work material to adhere or pressure-weld to the cutting edge of the tool forming this. p512 |
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Term
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Definition
used to compute the shear angle.
[rc]=t/[tc] p499
t=thickness of an uncut chip
tc= thickness formed by the shear process.
Can be determined dynamically if a reliable means to measure Vc can be found. |
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Term
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Definition
| Vc, the cutting speed of the chip p498 |
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Term
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Definition
Fc, this and Ft(tangential force) compose R p500
Fc=Ks*t*w p505 |
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Term
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Definition
| Ks, Closely aligned with flow stress but simpler to calculate in that phi is not used. Can be viewed as a material property on the workpiece. p505 |
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Term
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Definition
| Is used to machine the workpiece and is the most critical component. p482 |
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Term
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Definition
*This is represented by (D1-D2)/2 p482
in turning it is the distance the tool is plunged into the surface
Represents the third dimension p482
Primary cause and control of chatter. Defines chip width p508 |
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Term
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Definition
| A drill feeds and rotates into a stationary work (picture on 482) |
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Term
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Definition
| Machining is a ____ process of large strain and high strain rates. p503 |
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Term
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Definition
| *What is the amount of material removed per revolution? p481 |
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Term
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Definition
F, this and normal force acting on the tool/chip interface contact area compose R
p500 |
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Term
| Grinding (Abrasive Machining) |
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Definition
| Work feeds into a rotating wheel (picture on 482) |
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Term
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Definition
a lathe is a typical one for the turning process p482
-a machine designed for solid shaping work. (Websters) |
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Term
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Definition
| Removing unwanted metal from a workpiece p480 |
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Term
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Definition
| Work feeds into a rotating cutting wheel (picture on 482) |
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Term
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Definition
| The cutting edge and the cutting motion are not perpendicular to each other. (drilling, shaping, and single-point turning) p497 |
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Term
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Definition
*What process is used to determine experimentally values for specific horsepower? p512
-Is done to test machining mechanics p497 |
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Term
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Definition
| A constant chip thickness results in a steady cutting force and the elimination of the feedback mechanism responsible for _________. |
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Term
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Definition
A basic chip formation process. p481
the saw blade move along the work. (picture on 482) |
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Term
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Definition
| the periodic response of the system to a constant input. The vibration may grow in amplitude and occurs near the natural frequency of the system regardless of input. |
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Term
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Definition
| Work feeds laterally into a reciprocating tool (picture on 482) |
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Term
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Definition
| PHI, a function of the measurable chip thickness ration by expanding the cosine term and simplifying. p499 |
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Term
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Definition
| Vs, cutting speed at the onset of the shear angle. p498 |
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Term
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Definition
| dependent only on the rake angle |
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Term
| Shear Force (Flow Stress) |
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Definition
| Fs, This and Ns acting on a shear plane area As compose R' p500 |
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Term
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Definition
| also called unit power. Represents the approximate power needed at the spindle to remove a cubic inch of metal per minute. p493 |
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Term
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Definition
*What is the primary cutting motion? p481
relates the velocity of the cutting tool relative to the workpiece p481 |
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Term
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Definition
| relates the total width of cut that can be machined to the rotational speed of the tool with a specified number of cutting edges. p509 |
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Term
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Definition
an example of a single point tool process. p485
The tool feeds and the work rotates (picture on 482) |
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Term
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Definition
| the mechanism by which a process dissipates energy. p(504) |
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Term
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Definition
| workpieces are held in these. |
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Term
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Definition
The velocity of the cutting tool is relative to this. p481
The object you are working with (best guess) |
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Term
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Definition
| AlO, used as a metallic binder in ceramics. p528 |
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Term
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Definition
| The unwanted rough edge of a cutting tool. (p528 and google.) |
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Term
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Definition
| Non ferrous alloys, they are manufactured by powder metallurgy techniques. Became popular in WWII. p525 |
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Term
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Definition
*Another name for what is Stellite Tools? p523
Are cobalt rich, Chromium-Tungsten-Carbon cast alloys having properties and applications in the intermediate range between high speed steel and cemented carbides. p523 |
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Term
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Definition
| *What is made of pure aluminum oxide? p528 |
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Term
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Definition
A new class of tool materials best suited for finishing. p528
Ceramic material in a metal binder. New ceramic materials that will have significant impact on future manufacturing productivity. p522 |
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Term
| Chemical Vapor Deposition (CVD) |
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Definition
| *What is an atmosphere controlled process carried out at temperatures in the range of 950 to 1050 degrees C p520 |
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Term
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Definition
| can consistently improve tool life 200 or 300% |
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Term
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Definition
| a concave depression in the face of the cutting tool above the cutting edge(tooling u) |
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Term
| Cubic Boron Nitride (CBN) |
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Definition
High cost, but sometimes their use is justified. p522
Used for hard workpieces and high speed machining. p529 chart |
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Term
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Definition
Acts primarily as a coolant and secondly as a lubricant, reducing the friction effects at the tool/chip interface and the work/flank regions. p543
These have flourished in variety and are employed in virtually every machining process. p543 |
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Term
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Definition
| Cutting speed and feed are limited by this. p521 |
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Term
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Definition
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Term
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Definition
| *What is the hardest material known? p530 |
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Term
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Definition
| hardness decreases slowly with temperature. The most critical characteristic. p517 |
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Term
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Definition
*F. W. Taylor and White introduced these in 1900? p522
Superior to tool steel in that it retains irs cutting ability at temperatures up to 1100 degrees F. Can operate at higher cutting speeds. p522 |
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Term
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Definition
| Refers to the ease with which a metal can be machined to an acceptable surface finish. p542 |
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Term
| Physical Vapor Deposition (PVD) |
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Definition
| *What uses reacting free titanium ions with nitrogen away from the surface of the tool? p520 |
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Term
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Definition
| consist of fine grain size diamond particles sintered together and metallurgically bonded tp a cemented carbide substrate. p530 |
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Term
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Definition
| cutting-edge radius of 100 A or less, have been used for precision machining of large mirrors. p530 |
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Term
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Definition
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Term
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Definition
| cobalt-rich, Chromium-Tungsten-Carbon cast alloys having properties and applications in the intermediate range between HSS and cemented carbides. p523 |
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Term
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Definition
| TiN, Used in Physical Vapor Deposition as a coating. |
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Term
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Definition
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Term
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Definition
| attached to the front of the carriage, has the controls for providing manual and powered motion for the carriage and powered motion for the cross slide. p559 |
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Term
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Definition
| Term applied to a lathe that is semiautomatic and makes simultaneous cuts using massed tooling but does not use screw-machine or turret principles. p568 |
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Term
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Definition
| the base and the backbone of the lathe. p557 |
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Term
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Definition
A variation of turning. Essentially it is internal turning. Can be used to form internal cylindrical or conical surfaces. p549
Always involves the enlarging of an existing hole p551 |
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Term
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Definition
| A relatively flat H-shaped casting. p558 |
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Term
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Definition
| Used to support a variety of workpiece shapes and to permit more operations to be performed than can be accomplished when the work is held between centers. p577 |
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Term
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Definition
| Used to hold smooth cold-rolled bar stock or machined workpieces more accurately than with regular chucks. p578 |
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Term
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Definition
| The tool is fed all the way to the axis of the workpiece, it will be cut in two. A simple thin tool is used. p549 |
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Term
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Definition
| Most lathes use single point __________. p572 |
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Term
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Definition
| This and smaller feeds are preferred to the reverse procedure, because fewer cuts are required and less time is lost in reversing the carriage and resetting the tool the tool for the following cut. p550 |
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Term
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Definition
| Can be done on lathes with the drill mounted in the tailstock quill of engine lathes or the turret on turret lothes and fed against a rotating workpiece. p553 |
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Term
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Definition
| The essential components of this are the bed, headstock assembly, tailstock assembly, carriage assembly, quick-change gearbox, and the leadscrew and feed rod. p556 |
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Term
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Definition
| Used to support irregularly shaped work that cannot be gripped easily in chucks or collects. p579 |
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Term
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Definition
| The tool is fed at 90 degrees to the axis of rotation, using a tool that is wider than the width of the cut. A flat surface is produced. p548 |
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Term
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Definition
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Term
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Definition
| Is bolted to the lathe carriage. It has two contact figures that are adjusted to bear against the workpiece, opposite the cutting tool, in order to prevent the work from being deflected away from the cutting tool by the cutting forces. p580 |
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Term
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Definition
| Mounted in a fixed position on the inner ways, provides powered means to rotate teh work at carious rpm values. |
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Term
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Definition
| produces a regularly shaped, roughened surface on a workpiece. p554 |
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Term
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Definition
hold in the quill. p557
Workpieces that are relatively long with respect to their diameters are usually machined between centers. p576 |
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Term
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Definition
normally holds the workpiece that is used in the facing process. p552
Workpieces that must be machined on both ends or are disk-shaped are often mounted on _______ for turning between centers. p577 |
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Term
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Definition
| Long equations with L and D or =12Vfd p552 |
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Term
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Definition
| Can be done on a lathe but requires special attachments. p555 |
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Term
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Definition
| The operation by which one section of a workpiece is severed from the remainder by means of a cutoff tool. p552 |
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Term
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Definition
| A hollow steel cylinder that can be moved longitudinally in and out of the upper casting by means of a handwheel and screw. p557 |
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Term
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Definition
| On a lathe involves no special precautions. They are held in the tailstock quill, taper-shank types by means of a drill chuck. p554 |
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Term
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Definition
| lathes designed for completely automatic operation. Originally designed for machining small parts like screws and bolts. p565 |
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Term
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Definition
| Provide means of supporting such work between the headstock and the tailstock. p580 |
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Term
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Definition
| consists of three parts in a classic engine lathe. A lower casting, an upper casting, and a quill. p 557 |
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Term
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Definition
| The tool is fed at an angle to the axis of rotation, an external conical surface result. p548 |
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Term
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Definition
The process of machining external cylindrical and conical surfaces. p548
Constitutes the majority of lathe work. p550 |
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Term
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Definition
| A longitudinally feedable, hexagon turret replaces the tailstock. p562. |
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Term
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Definition
| Methods used for supporting workpieces in lathes. p576 |
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