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| a basic machining process by which a surface is generated by progressive chip removal |
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| the cutting tool used in milling is known as a _____ |
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| when equally spaced peripheral teeth intermittently engage and machine the workpiece |
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| the surface is generated by teeth located on the periphery of the cutter body. The surface is parallel with the axis of rotation of the cutter |
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| usually performed on horizontal milling machines. The tool rotates at some rpm while the work feeds past the tool at a table feed rate in inches per minute |
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| done on both horizontal and vertical spindle machines |
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| very common operation performed on both vertical and horizontal spindle milling machines or machining centers |
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| the traditional way to mill, AKA conventional milling. The cutter rotates against the direction of feed of the workpiece |
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| the cutter rotation is in the same direction as the feed rate |
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| staggered-tooth milling cutter |
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| narrow cylindrical cutters having staggered teeth, and with alternate teeth having opposite helix angles |
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| two or more side milling cutters often are spaced on an arbor to straddle the workpiece |
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| made for the purpose of milling the semi-cylindrical seats required in shafts for woodruff keys...they also come in standard woodruff key sizes |
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| the column mounted on the base, is the main supporting frame for all the other parts and contains the spindle with is driving mechanism |
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| milling machines that can duplicate external or internal geometries in two dimensions |
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| produce forms in 3 dimensions |
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| designed to specifically hold a part in the correct location with respect to the tool. They also reduce the time it takes to put the part in the machine...provide clamping forces that counteract the cutting forces |
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| holes are made by doing this |
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| most common type of drill with 3 parts: body, point, and shank |
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| contained in the body, spiral or helical grooves that are separated by lands |
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| Principal rake angles behind the cutting edges are formed by the relation of the flute ________ to the work |
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| the thin ______ between the flutes that forms a metal column or backbone |
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| the intersection of the web and cone produces this |
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| at the end of the taper shank, fits loosely in a slot at the end of the tapered hole in the spindle |
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| AKA gun drills, used when deep holes are to be drilled |
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| half-round drills, drilled axially with a coolant hole to deliver cutting fluids to the cutting edge |
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| widely used for making holes 1in or larger in diameter at low speeds, or with high-feeds |
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| can produce a hole four times faster than a spade drill because they run at high speeds/low feeds and are really more of a boring process than a drilling process |
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| holds straight-shank drills, are adjustable over a considerable size range and have radial steel fingers |
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| Work that is to be drilled is held in a vise or in specially designed workholders called _____ |
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| the common name for the machine tool used for drilling. consists of a base, a column that supports a pwerhead, a spindle, and a worktable |
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| used when several related operations, such as drilling holes of different sizes, reamin, or counterboring, must be done on a single part |
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| used when a series of holes of different sizes, or a series of operations must be done repeatedly in succession |
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| radial drilling machine tools |
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Definition
| used on large workpieces that cannot easily be handled manually. These machines have a large, heavy, round vertical column supported by a base |
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| multiple spindle drilling machines |
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Definition
| mass-production machines with as many as 50 spindles driven by a single powerhead and fed simultaneously into the work |
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Definition
| provides an enlarged cylindrical hole with a flat bottom so that a bolt-head, or a nut, will have a smooth bearing surface that is normal to the axis of the hole |
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| makes a beveled section at the end of a drilled hole to provide a proper seat for a flat -head screw or rivet |
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| doen to provide a smooth bearing area on an otherwise rough surface at the opening of a hole and normal to its axis |
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| intended to be turned and fed by hand and to remove only a few thousandths of an inch of metal |
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| for use with various machine tools ar slow speeds. These reamers also have chamfers on the front end of the cutting edges |
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| used for sizes over 3/4 in. in order to save cutting tool material |
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| push something else backwards (usually friction or normal force) to accelerate yourself forwards |
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| together with the ____, provides the means for mounting and moving cutting tools. Is a part of the carriage assembly. |
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| is the base and backbone of a lathe. Is usually made of well normalized or aged gray or nodular cast iron and provides a heavy, rigid frame on which all the other basic components are mounted. |
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| Always involve the enlarging of an existing hole, which may have been made by a drill or may be the result of a core in a casting. Essentially, ______ is internal turning. _____ can use single-point cutting tools to produce internal cylindrical or conical surfaces. |
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| a relatively flat H-shaped casting, rides on the outer set of ways on the bed. It is on the carriage assembly which provides the mean for mounting and moving cutting tools. |
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| A lathe chuck is a device on the driven spindle on the head (headstock) of the machine that holds the workpiece. It grips and spins it. |
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| is a holding device, specifically, a subtype of a chuck that forms a collar around the object to be held and exerts a strong clamping force on the object when it is tightened via a tapered outer collar. It may be used to hold a workpiece or a tool. |
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| When the tool is fed all the way to the axis of the workpiece, it will be cut in two. Also known as parting. |
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| p 572 Most lathe operations are done using single point ____, such as those illustrated in Figure 23-25. On right-hand (and left-hand turning) and facing tools, the ____ usually takes place on the side of the tool; therefore, the side rake angle is of primary importance, particularly when deep cuts are made. |
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| p550 Roughing cuts may be as heavy as proper chip thickness, cutting dynamics, tool life, lathe horsepower, and the workpiece permit. Large _______ 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 for the following cut. |
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| p553 This can be done on lathes with the ____ mounted in the tailstock quill of engine lathes or the turret on turret lathes and fed against a rotating workpiece. |
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| p556 The essential components of an _____ are the bed, headstock assembly, tailstock assembly, carriage assembly, quick-change gearbox, and the leadscrew feed rod. |
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| p579 These are used to support irregularly shaped work that cannot be gripped easily in chuck or collets. The work can be bolted or clamped directly on the ____ or can be supported on an auxiliary fixture that is attached to the _____. |
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| An operation called _________ is when the tool is fed at 90 degrees to the axis of rotation, using a tool that is wider than the width of the cut producing a flat surface |
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| p 585 The ___, fr, is given in inches per revolution. The depth of cut in drilling is equal to half the ____ rate, or t = fr/2. The ___ rate in inches per minute fm, is frN. In dealing with drilling, because the ___ may be manually controlled, care must be exercised, particularly in drilling small holes. |
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| p 580 This is bolted to the lathe carriage. It has two contact fingers 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. |
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Definition
| this is mounted in a fixed position on the inner ways of a lathe and provides powered means to rotate the work at various rpm values. |
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Definition
| This produces a regularly shaped, roughened surface on a workpiece. In most cases this is done on external cylindrical surfaces using lathes; it is a chipless, cold forming process |
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Definition
| Workpieces that are relatively long with respect to their diameters are usually machined between __________. Two of these are used, one in the spindle hole and one in the hole in the tailstock quill. Two types are used, called dead and live |
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Definition
| Workpieces that must be machined on both ends or are disk-shaped are often mounted on ______________ for turning between centers. There are three common types: Gang, Solid, and Cone. |
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Term
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Definition
| This controls the trimmings and shavings that are created in turning and boring processes |
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Term
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Definition
| This can be done on a lathe but requires special attachments; it is the basic machining process by which a surface is generated by progressive chip removal. The act or process of grinding, cutting, pressing, or crushing |
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Term
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Definition
| this is the operation by which one section of a workpiece is severed from the remainder by means of a cutoff tool; If the tool is fed all the way to the axis of the workpiece, it will be cut in two. This is called ____________ or cuttoff and a simple, thin tool is used |
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Term
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Definition
| This is a hollow steel cylinder, usually about 2 to 3 inches in diameter that can be moved longitudinally in and out of the upper casting by means of a handwheel and screw. |
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| on a lathe involves no special precaution. To enlarge to desired size by means of a reamer. |
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| are lathes designed for completely automatic operations. |
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| provide means for supporting such work between the headstock and the tailstock. Can also be used in place of the tailstock as a means of supporting the end of long pieces, pieces having too large an internal hole to permit using a regular dead center, or work where the end must be open for boring. |
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Definition
| assembly containing three parts, a lower casting fits on the inner ways of the bed, an upper casting fits on the lower one, and the third major component of the assembly is the tailstock quill. |
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Definition
| when the tool is fed at an angle to axis of rotation and an external conical surface results. |
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| constitutes the majority of the lathe work and is the process of machining external cylindrical and conical surfaces. |
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| a longitudinally feedable, hexagon turret replaces the tailstock and the turret on which six tools can be mounted can be rotated about a vertical axis to bring each tool into operating position, and the entire unit can be translated parallel to ways. |
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| devices for lathes that are commonly used for supporting work pieces. |
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