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Chapter 7 Flame Cutting
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- 1Combination welding and cutting torchWhat is a combination welding-cutting torch? A torch that can have a cutting head, welding tip, or a heating tip. State one advantage of owning a combination welding-cutting torch as opposed to just having a cutting torch. You can use it for multiple tasks.
- 2Coupling distanceThe distance to be maintained between the inner cones of the cutting flame and the surface of the metal being cut, in the range of 1/8 in. to 3/8 in.
- 3CreepCreep and Creep Rupture
When a metal specimen maintains a certain stress at a high temperature, plastic deformation begins to occur, which, in time, results in fracture — even if the stress is less than the yield stress of the metal. This phenomenon is called “creep.” - 4cutting levercutting lever. most pivot from the front to the back end of the torch body.
- 5cutting tipsThe tip of a welding or cutting torch is where the action is
- 6diaphragmA metal diaphragm for welding is a type of seal used for flat covers in exchangers operating at high pressures,
- 7DragDrag is accomplished when your stinger is ahead of the puddle and wire or rod is at the leading edge dragging the puddle along. It's kind of like when you pull (drag) a wagon--the wagon tongue would be the rod or welding wire. The opposite to dragging is pushing
- 8drag linesDrag lines are line markings that show on the surface of the cut. ... Drag lines of this type indicate a poor cutting procedure that could result in the loss of the cut (
- 9equal pressure torchesThe equal pressure torch (fig. 5-11) is designed to operate with equal pressures for the oxygen and acetylene.
- 10flashback-ArrestorThe flashback arrestor is designed to prevent the backflash of a flame through the torch into the hoses and regulator which can cause the torch and hoses to blow up and cause severe injury to the operator.
- 11Hard SlagWelding slag is a form of slag, or vitreous material produced as a byproduct of some arc welding processes, most specifically shielded metal arc welding (also known as stick welding), submerged arc welding, and flux-cored arc welding. ... Slag is the solidified remaining flux after the weld area cools.
- 12high speed cutting tipa cutting tip used to cut metal at high speeds
- 13Injector ChamberWelding slag is a form of slag, or vitreous material produced as a byproduct of some arc welding processes, most specifically shielded metal arc welding (also known as stick welding), submerged arc welding, and flux-cored arc welding. ... Slag is the solidified remaining flux after the weld area cools.
- 14kindling pointKindling Point. The temperature at which a substance bursts into flame producing heat and light.
- 15kindling temperaturekindling temperature, about 1800°F.
- 16leak-detection solutionTest Solutions. Leak testing is used to determine whether products pass a specified leak limit. Leaks occur when a gas or liquid flows from a higher pressure side to a lower pressure side of a part and are caused by holes, cracks, weak seals or permeable areas in a product.
- 17line pressure drop in weldingProcess piping systems are subject to a phenomenon known as pressure drop. Simply put, pressure drop is the difference in total pressure between two points in a fluid-carrying network. When a liquid material enters one end of a piping system, and leaves the other, pressure drop, or pressure loss, will occur
- 18Machine cutting torchMachine cutting torch cuts more precisely with a semiautomatic cutting process.
- 19MPS GasesAn MPS gas is a mixture of two or more of propane, butane, butadiene, methylacetylene (propyne, CH3C≡CH) and propadiene (CH2=C=CH2). ... As a fuel gas, it burns hotter than propylene, propane or natural gas.
- 20orificean opening, as of a pipe or tube
- 21oxyacetylene hand torchOxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. When mixed together in correct proportions within a hand-held torch or blowpipe, a relatively hot flame is produced with a temperature of about 3,200 deg.
- 22oxyfuel gas cuttingOxy-fuel cutting is used for the cutting of mild steel. Only metals whose oxides have a lower melting point than the base metal itself can be cut with this process. Otherwise as soon as the metal oxidises it terminates the oxidation by forming a protective crust.
- 23Preheat FlameFlame Cutting/Oxygen Burning requires some source of intense heat to get the plate hot enough to be cut/burned. This source of heat is referred to as the “preheat flame”. The whole plate does not need to be heated, not even the bottom, just that portion slightly ahead of the cutting reaction.
- 24Preheat HolesThe six small holes in the cutting tip are called preheat holes, and the larger, center hole is called the cutting hole. Each of the preheat holes produces a flame that resembles a standard welding flame.
- 25Regulator GuagesRegulator Gauges
Welding pressure regulators usually have one to two pressure gauges. - 26Safety DiscTwo types of safety devices are commonly found on welding pressure regulators. They prevent extremely high pressures from damaging the regulator. ... Once excessive pressure has been released, the valve will reset. Safety Disc: A thin disc the will burst to release excessive pressure. The disc must be replaced after use.
- 27Safety Release ValveSafety Release Valves: a valve consisting of a small ball tightly held with a spring to a seat. Once excessive pressure has been released, the valve will reset.
- 28Seatremovable seat in a plasma torch head to enable the safety interlock.
- 29Siamese Hoseiamese welding hoses are dual equipped hoses to allow more then one person to weld at once. ... Oxygen flowing through an acetylene hose may cause an explosion.
- 30slagWelding slag is a form of slag, or vitreous material produced as a byproduct of some arc welding processes, most specifically shielded metal arc welding
- 31SoapstoneSoapstone is widely used in welding applications to create temporary markings in a way similar to chalk. However, unlike the latter, soapstone markings do not burn at extreme temperatures. The writing is facilitated by the holder and it helps avoid deformation.
- 32soft slagsoft slag. very porous, brittle and easily removed from a cut. tip cleaners.
- 33tip cleanersA tip cleaner is a small tool housed in a plastic container. It is made up of many tiny circular files of all different thicknesses that are used to fit inside the holes on the tip of your welding torch. They help clean away any gunk that may be clogging your tip and preventing it from working correctly.
- 34Two-Stage RegulatorsTwo-stage regulators are designed to lower the high pressure in two stages. They require less readjustment and provide a more constant delivery pressure despite changes in inlet pressure. They are exceptionally well suited for high pressure cylinder applications.
- 35VenturiThe Venturi tube is used for the measurement of gas and fluid flow, in which there is low pressure loss primary requirement. According to type of production there are: classical Venturi tubes with cast, or machined or welded confuser.
- 36Working PressureWorking Pressure: Displays the pressure of the gases in the regulator, which is always less than the pressure of the gases at the torch. Cylinder Pressure: Indicates the pressure and amount of gas in the cylinder.
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- Fichas sobre Chapter 7 Flame Cutting, creado por Brenden Mulligan el 14/03/2021.
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