Term
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Definition
| used to blow the molter metal through the cut, cool the workpiece, minimize the heat affected zone, and possibly assist in combustion of the material during the laser beam cutting process. (p980) |
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Term
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Definition
| Simple fusion welds without filler metal. (p978) |
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Term
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Definition
| Welding to pieces together without overlapping(dictionary) |
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Term
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Definition
| A variation of forge welding that uses no heating but produces metallurgical bonds by means of cold plastic deformation. The pieces are cleaned and then a lot of pressure is applied. (p970) |
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Term
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Definition
| Occurs when properly prepared surfaces are maintained in contact under sufficient pressure and time at elevated temperature. Bonding method is atomic diffusion. (p974) |
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Term
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Definition
| A fusion welding process in which heating results from the impingement or a beam of high velocity electrons on the metal to be welded. Obtains high purity welds. (p976) |
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Term
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Definition
| A very effective process for welding thick sections of steel plate. Heat is derived from the passage of electrical current through a liquid slag. (p975) |
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Term
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Definition
| used in Projection welding. Dimples in the workpiece. (p968) |
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Term
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Definition
| Used primarily to bond sheets of corrosion-resistant metal to heavier plates of base metal. The bottom sheet is positioned on a rigid base, and the top sheet is inclined to it with a small open angle between the surfaces to be joined, and then explosives are placed on top. (p974) |
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Term
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Definition
| The surface of a material in contact with another to which it will be joined (dictionary) |
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Term
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Definition
| The softened metal that is squeezed out in friction welding. (p971) |
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Term
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Definition
| Two pieces of metal are first secured in current-carrying grips and lightly touched together. The pieces are withdrawn slightly and a intense flashing arc causes the welding. (p981) |
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Term
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Definition
| the most ancient welding process. Pretty much the welding process in movies about the middle ages with a forge, hammer, and anvil. (p969) |
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Term
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Definition
| Used often in the manufacturing of pipes. A heated strip of steel is first formed into a cylinder, and the edges are pressed together in either a lop or a butt configuration. (p969) |
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Term
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Definition
| The heat required to produce the joint is generated by friction heating at the interface. One piece is stationary and the other is mounted in a motor driven chuck. (p970) |
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Term
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Definition
| The frictional heating is generated by a non-consumable probe that is rotated at high speed between the abutting edges of rigidly clamped plates. (p972) |
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Term
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Definition
| the deposited surfaces are generally harder than the base metal. Another name for surfacing?? (p983) |
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Term
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Definition
| A gas is heated by an electric coil as it passes through a welding gun. (p983) |
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Term
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Definition
| Uses an external heat source and is probably the simplest of the mass production techniques used to join plastics. The parts to be joined are held in fixtures and pressed against the opposite sides of an electrically heated tool. (p983) |
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Term
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Definition
| metal inserts are placed between the parts to be joined and are then heated by means of induction or resistance heating. (p983) |
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Term
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Definition
| A modification of friction welding where the moving piece is attached to a rotating flywheel and the flywheel is brought to a specified rotational speed and is then separated from the driving motor. The components are then pressed together, and the kinetic energy of the flywheel is converted into frictional heat at the interface between the two pieces. (p971) |
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Term
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Definition
| Another process to weld thermoplastics (p983) |
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Term
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Definition
| The width of the cut. Narrowest when cutting with inert gasses. (p980) |
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Term
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Definition
| Overlapping join. (dictionary) |
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Term
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Definition
| Begins by drilling a hole through the material and then moving the beam in a programmed path. (p980) |
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Term
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Definition
| The beam can be focused to a small diameter and provide power density. (p978) |
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Term
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Definition
| Can be preformed with access to only one side of the joint. A non-contact process and produces no indentations. (p981) |
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Term
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Definition
| When a nontransferred arc is used, only a mechanical bond is produced, and the process becomes a form of this. (p984) |
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Term
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Definition
| Another process to weld thermoplastics (p983) |
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Term
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Definition
| Water-cooled and usually made of copper. Confine molten slag during Electroslag welding. (p976) |
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Term
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Definition
| coalesced metal formed between the faying surfaces. (p964) |
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Term
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Definition
| A rapid descharge of stored energy produces a brief period of arcing, which is then followed by the rapid application of force to expel the molten metal and produce the joint. (p981) |
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Term
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Definition
| Provides a means of overcoming both limitations of high maintenance and one at a time spot welds. A dimple is embossed into one of the workpieces at the location where a weld is desired. (p968) |
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Term
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Definition
| Both heat and pressure are used to induce coalescence. p(961) |
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Term
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Definition
| can be made by two distinctly different processes. First, sheet metal segments are joined to produce gas or liquid tight vessels, by creating a series of overlapping spot welds. |
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Term
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Definition
| the simplest and most widely used form of resistance welding. Providing a fast, economical means of joining overlapped materials that will not require subsequent disassembly. p(964) |
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Term
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Definition
| For light production work where complex current-pressure cycles are not required. Lower electron is stationary and the upper is on a pivot arm. (p965) |
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Term
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Definition
| Two or more sheets or plates of metal can be joined by passing them simultaneously through a rolling mill. (p970) |
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Term
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Definition
| Produces coalescence at temperature below melting point of the base materials. (Key To Materials) |
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Term
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Definition
| Portable ones have been instrumental in extending the application of the spot-welding process. Connected to a stationary power supply and control unit by flexible air hoses, electrical cables, and cooling lines. (p965) |
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Term
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Definition
| or overlaying is the process of depositing a layer of weld metal on the surface or edge of a base material of different composition. (p983) |
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Term
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Definition
| Refers to a mechanical mixture of about one part finely divided aluminum and three parts iron oxide, plus possible alloy additions. The mixture is ignited by a magnesium fuse. (p975) |
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Term
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Definition
| Superheated molten metal and slag are produced from an exothermic chemical reaction between metal oxide and a metallic reducing agent. (p975) |
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Term
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Definition
| only plastics that can be welded since the materials can be melted or softened by heat without degradation. (p982) |
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Term
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Definition
| Do not soften with hear, tending only to char or burn, and must be joined with fasteners or adhesives. (p982) |
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Term
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Definition
| A small integral transformer gun that enables the welding transformer to be integrated into the welding gun. (p965) |
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Term
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Definition
| A solid state process in which coalescence is produced by the localized application of high frequency shear vibrations to surfaces that are held together under rather light normal pressure. vibrations are perpendicular to the area of contact.(p972) |
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Term
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Definition
| Similar to flash welding but there is no period of arcing. The heating is achieved through electrical resistance. (p982) |
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Term
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Definition
| Relative movement between the two parts is again used to generate heat, but the direction of movement is now parallel to the interface and aligned with the longest dimension of the joint. (p982) |
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Term
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Definition
| Capillary action is not required to distribute the filler metal. (p997) |
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Term
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Definition
| The permanent joining of similar or dissimilar metals or ceramics through the use of heat and a filler metal whose melting temperature is above 450 C but below the melting point of the materials being joined. (p989) |
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Term
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Definition
| Do not require additional thickness in the vicinity of the joint, but are most often used where the strength requirements are not that critical. (p991) |
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Term
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Definition
| Distributes the filler metal between the closely fitting surfaces of the joint. (p989) |
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Term
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Definition
| The assemblies are immersed in a bath of molten brazing metal. (p996) |
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Term
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Definition
| a metal of a different composition from the materials being joined. (990) |
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Term
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Definition
| A measure of the flow characteristics of the molten braze metal and is a function of the metal, its temperature, surface cleanliness, and clearance. (p991) |
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Term
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Definition
| applied to surfaces to be joined by soldering, brazing, or welding to clean and free them from oxide and promote their union. (dictionary) |
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Term
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Definition
| Make flux unnecessary by reducing existing oxides and preventing the formation of new ones. (p997) |
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Term
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Definition
| techniques have been developed using controlled atmospheres and other methods that percent oxide formation and enhance wetting. (p1001) |
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Term
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Definition
| Flux and Filler metal can be preloaded into the joints, a number of assemblies can be heated simultaneously in controlled-atmosphere furnaces. (p995) |
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Term
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Definition
| Used to hold the components during the heating. (p995) |
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Term
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Definition
| the most important factor contributing to joint strength. Gap between what is to be joined. (p990) |
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Term
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Definition
| Can provide bonding areas that are considerably larger than the butt configuration, and are often preferred when maximum strength is desired. (p991) |
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Term
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Definition
| None meet all the requirements needed for a good solder. (p999) |
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Term
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Definition
| Alloys based on silver and copper. (p994) |
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Term
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Definition
| a brazing type of operation where the filler metal has a melting temperature below 450 C. (p998) |
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Term
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Definition
| gas-flame combination can be used. Most repair brazing is done this way. Uses a gas-flame torch. (p995) |
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Term
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Definition
| A strong function of the surface tensions between the braze metal and the base alloy. Food when the surfaces are clean and the two metals can form intermediate diffused alloys. (p991) |
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Term
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Definition
| the area of the surface to be attached. (p1007) |
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Term
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Definition
| A nonmetallic material (p1002) |
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Term
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Definition
| a nonmetallic material is used to create a joint between two surfaces. (p1002) |
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Term
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Definition
| one-component, thermosetting, polyester acrylics remain liquid when exposed to air. (p1003) |
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Term
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Definition
| Stress where both surfaces are pulled apart. (Fig 40-3) |
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Term
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Definition
| both adhering surfaces are relatively large and are the same size and shape. (p1007) |
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Term
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Definition
| Have one adherend area that is very small compared tot the other. (p1007) |
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Term
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Definition
| Can be induced by the use of heat, radiation or light, moisture, activators...or combinations thereof. (p1002) |
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Term
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Definition
| Are separate pieces whose function is to join the primary components. (p1011) |
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Term
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Definition
| Artificial.Polymer with the property of elasticity. (dictionary) Can be bonded by adhesives (p1002) |
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Term
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Definition
| the oldest most common an most diverse of the adhesive systems and can be used to join most engineering materials. (p1003) |
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Term
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Definition
| Can be used to bond dissimilar substances. Thermoplastic resins that are solid at room temp, but melt quickly when heated. (p1004) |
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Term
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Definition
| Formed areas of a component that interfere or interlock with other components of the assembly and are most commonly found in sheet metal products. (p1011) |
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Term
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Definition
| a classification that includes a wide variety of techniques and fasteners designed to suit the individual requirements of a multitude of joints and dissemblies. (p1010) |
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Term
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Definition
| Stress where one side remains stationary and the other is pulled back. (Fig 40-3) |
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Term
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Definition
| Results are obtained through mechanical force instead of differential temperatures. (p1012) |
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Term
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Definition
| Parallel stresses pulled in opposite directions. (Fig 40-3) |
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Term
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Definition
| A dimensional change is introduced by use of heating or cooling. (p1012) |
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Term
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Definition
| selected for their ablility to effectively transmit load across the joint and include epoxies,....and hot melts. (p1002) |
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Term
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Definition
| Soft when heated and hard when cooled. (dictionary). Can be bonded by adhesives (p1002) |
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Term
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Definition
| Permanently hardened after one application of heat and pressure. (dictionary) Can be bonded by adhesives (p1002) |
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