Term
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Definition
| is a material-removal process that involves the interaction of abrasive grits with the workpiece at high cutting speeds and shallow penetration depths. p656 |
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Term
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Definition
| Most widely used artificial abrasive. p658 |
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Term
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Definition
| refers to the abrasive wear action of the grits resulting in dulled edges, grit flattening, and wheel glazing. p658 |
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Term
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Definition
| Not found in nature. Produced by a combination of intensive heat and pressure in the presence of a catalyst. p659 |
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Term
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Definition
| Makes it possible to grind both external and internal cylindrical surfaces without requiting the workpiece to be mounted between centers or in a chuck. p673 |
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Term
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Definition
| Being used increasingly in finishing both metal and nonmetal products. Made by gluing abrasive grains onto a cloth or paper backing. p678 |
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Term
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Definition
| p.658 - A type of abrasive, natural Al2O3. |
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Term
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Definition
| p.671 - The work is fed very slowly past the wheel and the total downfeed or depth is accomplished in a single pass. |
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Term
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Definition
| p.666 - consits of forcing a hard roll having the same contour as the part to be ground against the grinding wheel while it is revolving - usually quite slowly. |
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Term
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Definition
| p.672 - commonly used for producing external cylindrical surfaces. A grinding wheel rotates on an axis parallel with the work piece, and traverses along the length of the workpiece. |
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Term
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Definition
| Hardest of all materials. Those that are used for abrasives are either natural, off-color stones that are not suitable for gems, or mall, synthetic stones that are produced specifically for abrasive purposes (685) |
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Term
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Definition
| When a wheel is cleaned and sharpened (665) |
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Term
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Definition
| A mixture of alumina and magnetite, a natural abrasive used on coated paper and cloth (658) |
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Term
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Definition
| Refers to the fracture of the grits and is the opposite of toughness (658) |
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Term
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Definition
| Grinding ratio; defined as the cubic inches of stock removed divided by the cubic inches of wheel lost (663) |
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Term
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Definition
| natural, off-color stones that are not suitable for gems. p658 |
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Term
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Definition
| a measure of how strongly the grains are held in the wheel. Bond strength. p662 |
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Term
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Definition
| The abrasives are bonded together into a wheel, is the most common abrasive machining process. p662 |
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Term
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Definition
| a stock-removal process that uses fine abrasive stones to remove very small amounts of metal. cutting speed is much lower than that of grinding. p679 |
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Term
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Definition
| an abrasive surface-finishing process wherein fine abrasive particles are charged into a soft material. p681 |
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Term
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Definition
| Used primarily in coated abrasives and in air blasting. A natural abrasive. p658 |
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Term
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Definition
| Plastics can be compounded to have a wide range of properties. replaced shellac and rubber wheels. p663 |
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Term
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Definition
| used to produce wheels that can operate at high speeds but must have a considerable degree of flexibility so as to resist side thrust. rubber , sulfur, and other vulcanizing agents are mixed with the abrasive grains. p664 |
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Term
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Definition
| Made by mixing the abrasive grains with shellac in a heated mixture. Used primarily for strong, thin wheels. High polish. p664 |
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Term
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Definition
| Uses a waterglass(silicate of soda)as the bond material. useful when heat needs to be kept to a minimum. (Brittle and not as strong) p663 |
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Term
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Definition
| (p.658): grits or grains irregular in shape whose crystals are very hard, friable, and rather brittle |
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Term
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Definition
| (p.665): type of rough manual grinding that is done to remove fins, gates, risers, and rough spots from castings or flash from forgoings, preparatory to further machining |
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Term
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Definition
| (p.675): these machines are primarily used to grind flat surfaces |
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Term
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Definition
| restores the original shape. Pg 665 |
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Term
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Definition
| are composed of clays and other ceramic substances. The abrasive particles are mixed with the wet clays so that each grain is coated. Pg663 |
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Term
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Definition
| ( page 725 ) – a system of placing a workpiece in each of three perpendicular planes where the first plane is referenced with three points, the second plane is referenced with 2 points, and the third plane is designated by a single point |
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Term
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Definition
| ( page 733 ) – provides for the introduction of several component parts and the use of some type of fastening equipment, such as welding or riveting, and they are commonly of the open-frame type |
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Term
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Definition
| ( page 727) – a common jig that derives its name from its boxlike construction; they have five fixed sides and a hinged cover or leaf, which opens to permit loading the workpiece, and a cam that locks the workpiece in place |
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Term
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Definition
| ( page 726 ) – are simple and derive their name from the cross-sectional shape of the main member and they can be used only with parts having fairly simple shapes |
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Term
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Definition
| ( page 718 ) – refers to holding or maintaining the part in that location during the cutting operations ( resisting the cutting forces) |
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Term
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Definition
| Magnetic chucks that can be used only with ferromagnetic materials. Electrostatic checks can be used with any electrically conductive material. This principle directs that work be held by mutually attracting electrostatic fields in the chuck and the work piece. Pg 736 |
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Term
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Definition
| Devices such as jigs and tools. General term. Pg 737 |
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Term
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Definition
| Not listed. Has to do with provisioning easy removal during chip making operations. Pg. 723 |
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Term
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Definition
| Basically a tool that is used on workpieces for drilling, clamping and other machining related tasks. Comes in several basic forms and carries names that are descriptive of their configurations. Pg 726 |
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Term
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Definition
| It’s a hinged leaf or cover that can be swung open to permit the workpiece to be inserted and then closed to clamp the work in position. Pg 727 |
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Term
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Definition
| a dimension that determines the position of geometrical shapes with respect to each other. |
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Term
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Definition
| used for ferromagnetic materials. Pg(735) |
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Term
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Definition
| one of the simplest types, consisting only of a plate that contains the drill bushings and a simple means of clamping the work in the jig or the jig to the work. Pg(725) |
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Term
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Definition
| used only for drilling round parts, such as pipe flanges. The clamping force must be sufficient to prevent the part from rotating in the jig. Pg(726) |
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Term
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Definition
| (733) – a clamp that comes in many forms and sizes and is simple, low cost, and flexible. The force can be applied by a hand knob, a cam, or a wrench turning down a nut. |
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Term
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Definition
| (733) - accommodates only small thickness variation from part to part, yet provides an excellent, consistent clamping force |
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Term
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Definition
| (736) – a type of workholder in which the holes in the work plate are connected to a vacuum pump and can be opened or closed by means of valve screws |
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Term
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Definition
| (718) – hold and locate the work in the machine tool with respect to the cutting tool |
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Term
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Definition
| Mentioned on p712. The dictionary Definition is to remove by erosion, melting, evaporation, or vaporization. |
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Term
| Abrasive Flow Machining (AFM) |
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Definition
| Involves the use of a semisolid liquid or gel laden with abrasives to flow over or through a workpiece to perform edge finishing, deburring, radiusing, polishing, or minor surface machining. p705 |
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Term
| Abrasive Jet Machining (AJM) |
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Definition
| The least expensive of the nontraditional machining. Removes the material by a focused jet of abrasives and is similar in many respects to Abrasive Waterjet Cutting. p703 |
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Term
| Abrasive Waterjet Cutting (AWC) |
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Definition
| Waterjet cutting that requires the addition of abrasives. p703 |
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Term
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Definition
| In photochemical machining this is used to describe the directionality of the cut. p691 |
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Term
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Definition
| Through-etching of the workpiece. p689 |
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Term
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Definition
| the simplest and oldest of the chipless machining processes. p685 |
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Term
| Chemical-Mechanical Polishing |
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Definition
| Uses the synergy of chemistry and mechanical grinding to obtain flatness on the order of 50nm. p693 |
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Term
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Definition
| Single-sided, blind etching of the part. p689 |
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Term
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Definition
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Term
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Definition
| A molecule consisting of two identical simpler molecules. online |
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Term
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Definition
| thinning in center due to improper agitation or stacking of parts in tank. p689 |
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Term
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Definition
| The on-time as a percentage of the total cycle time (inverse to the frequency). p708 |
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Term
| Electrical Discharge Machining (EDM) |
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Definition
| one of the most widely used nontraditional machining process. Removal of metal by electrical sparks. p706 |
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Term
| Electrical Discharge Wire Cutting |
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Definition
| The electrode is a wire used for cutting through-cut features driving the workpiece with a cnc table. p707 |
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Term
| Electrochemical Deburring |
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Definition
| a process which works on the principle that electrolysis is accelerated in areas with small interelectrode gaps and prevented in areas with insulation between electrodes. p699 |
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Term
| Electrochemical Grinding (ECG) |
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Definition
| A low-Voltage, high-current variant of ECM in which the tool cathode is a rotating, metal bonded, diamond grit grinding wheel. p697 |
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Term
| Electrochemical Machining (ECM) |
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Definition
| Removes material by anodic dissolution with a rapidly flowing electrolyte. p694 |
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Term
| Electrochemical Micromachining |
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Definition
| Use pulsed currents. In one variation of the process photolithographic masks are used to concentrate material removal in selective areas of thing films. p696 (smoother surfaces and less taper) |
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Term
| Electrochemical Polishing |
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Definition
| a modification of the ECM process that operates essentially the sames as ECM, but with a much slower penetration rates. p697 |
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Term
| Electron Beam Machining (EBM) |
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Definition
| Is a thermal process that uses a beam of high-energy electrons focused on the workpiece to melt and vaporize metal. p711 |
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Term
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Definition
| Operates without the use of a part-specified hard tool. p697 |
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Term
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Definition
| Large numbers of holes can be simultaneously gang drilled in nickel and cobalt alloys with diameters down to .005 in. |
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Term
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Definition
| Describes the undercutting of the maskant. p690 |
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Term
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Definition
| Another name for etch factor. p690 |
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Term
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Definition
| Another name of precision PAC. p715 |
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Term
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Definition
| the etchant is applied to the workpiece in gel form. p687 |
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Term
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Definition
| This is a function of the metal, its thickness, and the cutting speed. p715 |
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Term
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Definition
| Another name of precision PAC. p715 |
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Term
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Definition
| Another name of Waterjet Cutting. p701 |
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Term
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Definition
| Can cause preferential etching. |
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Term
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Definition
| a nano-scale machining technology used in the microelectronics industry to cleave defective wafers for charachterization and failure analysis. p711 |
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Term
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Definition
| Isolated High Spots (defect). p688 |
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Term
| Laser Beam Machining (LBM) |
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Definition
| Uses an intensely focused, coherent stream of light to vaporize or chemically ablate materials. p712 |
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Term
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Definition
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Term
| Nontraditional Machining (NTM) |
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Definition
| Been Developed since WWII to address the growing list of machining requirements which cannot be handled by conventional machining alone. p684 |
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Term
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Definition
| The distance between the surface of the surface of the electrode and the surface ot the workpieces represents this. p709 |
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Term
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Definition
| can result if the etchant is not properly agitated, particularly on deep cuts. p688 |
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Term
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Definition
| Through-etching of the workpiece using maskants. p689 |
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Term
| Photochemical Machining (PCM) |
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Definition
| the use of photoresists in CHM. p688 |
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Term
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Definition
| when the photoresist method of applying maskants is used for single-sided blind etching of a part. p689 |
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Term
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Definition
| UV light-sensitive Emulsions. p688 |
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Term
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Definition
| Another name for dishing. p689 |
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Term
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Definition
| Uses a superheated stream of electrically ionized gas to melt and remove material. p714 |
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Term
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Definition
| Uses a special nozzle, where either a high flow vortex or a magnetic field causes the plasma to spin rapidly and stabilizes the plasma pressure. p 715 |
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Term
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Definition
| Has recently shown the potential to improve accuracies and surface finish in traditional ECM. High current densities are pulsed on for durations on the order of 1 ms and pulsed off for inter cals on the order of 10 ms. p696 |
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Term
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Definition
| The Electrode is a die in the shape of the negative of the cavity to be produced in a bulk material. p706 |
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Term
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Definition
| the use of traditional silk-screening technology. p688 |
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Term
| Shaped-Tube Electrolytic Machining (STEM) |
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Definition
| Can also drill large numbers of holes but not with radii smaller then .02in. p697 (Reduced voltages and a insulated tube) |
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Term
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Definition
| Another name for Ram EDM. p706 |
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Term
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Definition
| the material removal method for Electrical Discharge Machining. p706 |
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Term
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Definition
| The scribe-and-peel method is the only method capable of permitting this. p688 |
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Term
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Definition
| When a second photon strikes the energized atom, the atom gives off two photons of identical wavelength moving in the same direction and with the same phase. p712 |
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Term
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Definition
| Been developed for the removal of burrs and fins by exposing the workpiece to hot corrosive gases for a short period of time typically on the order of a few milliseconds. p715 |
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Term
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Definition
| Another name for Thermal Deburring. p715 |
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Term
| Ultrasonic Impact Grinding |
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Definition
| Another name for Ultrasonic Machining. p700 |
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Term
| Ultrasonic Machining (UCM) |
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Definition
| Employs an ultrasonically vibrating tool to impel the abrasives in a slurry at high velocity against the workpiece. p700 |
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Term
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Definition
| Uses high-Velocity fluid jet impinging on the workpiece. p701 |
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Term
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Definition
| Another name of Waterjet Cutting. p701 |
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Term
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Definition
| Capable of producing complex 2-D patterns in hard to machine materials. p707 |
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Term
| Wire EDM (Electrical Discharge Wire Cutting) |
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Definition
| Another name for Electrical Discharge Wire Cutting. p707 |
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Term
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Definition
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