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7435373 |
A method and apparatus for removing burrs from inside slotted metal liners exposes the burrs to a high-intensity gas flame that effectively oxidizes or incinerates the burrs, without inducing undesirable temperature levels in the parent ...
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6786979 |
A steel cutting apparatus includes a cutting torch that is moved in an arcuate path for guiding the cutting torch so that a cutting flame of the cutting torch is always aimed at a bottom corner of the steel at the side where the cutting ...
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5747771 |
A method of machining a blind slot 3 in a workpiece 2 comprises heating the surface of the workpiece 2 above its melting temperature with, for example, a beam of laser energy and directing at least two gas streams 5, 6 such that they tog...
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5304256 |
A thermochemical scarfing method is disclosed which allows a greater diagonal standoff distance from the metal workpiece during preheating. The method includes preheating the end of the metal workpiece, and then scarfing the workpiece by...
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4615377 |
An improved method of and apparatus for striping hot steel slabs on the runout table of a continuous caster employs a torch support and drive mechanism adapted to support a scarfing torch for movement at a uniform rate across the surface...
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4441935 |
An inspection track is scarfed by moving a burner across a flat surface of a steel slab, particularly a slab of ductile steel of deep-drawing quality, to enable sub-surface inspection of the slab. To achieve accurate control of the depth...
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4405383 |
The invention relates to the surface stripping treatment of objects consisting of iron with a high carbon content, the surface stripping treatment being carried out by means of a flame which is directed at the surface and which is formed...
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4373969 |
The invention concerns a method of selective crack removal from ingots and slabs, and the torch for carrying out the method. The method comprises burning surface impurities with a jet of oxygen, the strength and shape of which vary conti...
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4287005 |
A method for spot scarfing a metal workpiece comprising continuously producing a pilot puddle on the surface of the workpiece, spreading the pilot puddle to a preselected width with a high intensity stream of oxygen gas, and impinging a ...
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4266989 |
A cantilevered transverse arm is mounted for movement along both a longitudinal and transverse axis. The outer end of the arm is adapted to be disposed over a metal slab to be cut and carries a tool assembly which is adjustable thereon. ...
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4243436 |
A process for spot scarfing the surface of a metal workpiece comprising: (a) impinging a stream of pilot oxygen gas upon a portion of the workpiece which is at least at its oxygen ignition temperature, said stream of pilot oxygen gas ...
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4161413 |
A process for thermochemically scarfing a metal workpiece comprising: Preheating a spot on the surface of the workpiece where the scarfing reaction is to begin by directing a post-mixed preheating flame at the spot. The preheating fla...
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4139757 |
This invention relates to a method and a device for igniting a gas planing process. The method is based on applying heat to a workpiece by means of a movable heat source, which in principle has a point effect so that the heated or molten...
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4115154 |
A process for thermochemically scarfing a metal workpiece comprising: Preheating a spot on the surface of the workpiece where the scarfing reaction is to begin by directing a post-mixed preheating flame at the spot. The preheating flame ...
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4115151 |
The present invention relates to a method and an apparatus for treating the surface of a workpiece. The invention ensures correct working of the workpiece surface and renders an accurate control of the working place in question possible....
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4078950 |
A scarfing nozzle and method for producing a fin-free scarfing cut at least as wide as the width of the nozzle. The method is characterized by directing a stream of oxygen at the spot to be scarfed from a scarfing nozzle which restricts ...
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4040871 |
A method for producing an individual, fin-free, spot scarfing cut on the surface of a workpiece characterized by directing at the spot to be scarfed, which has first been brought to a molten state, an oxygen stream at an inclined angle t...
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4038108 |
A method and apparatus for making an instantaneous thermochemical start on the surface of a metal workpiece. The method resides in the use of laser beam focused to a small spot to bring the ferrous workpiece to ignition temperature in co...
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3966504 |
The present invention relates to a method and an apparatus for initiating and maintaining a thermochemical process of scarfing the surface of a workpiece to remove surface defects like, e.g., cracks, in which there is used a unit of torc...
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3890167 |
A method for producing a casting wherein the casting is solidified in a continuous casting machine and treated by medium scarfing while maintaining the surface temperature at 500° to 900°C, and thereafter, cooled forceably to bring the...
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3870570 |
A slab conditioning system including a pair of rotatable leaves for supporting metal slabs and a conditioning tool platform mounted above the leaves and adapted to traverse the slab during the conditioning process.
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3862749 |
A metal slab conditioning system including two or more slab-supporting and turnover devices in combination with a movable slab conditioning tool platform suspended thereabove. Each slab-supporting and turnover device includes a pair of i...
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3850704 |
In the scarfing of metal surfaces, such as the interior faces for ingot moulds, a flame torch is used to melt the surface and a jet of air or oxygen is directed separately onto the heated area to remove slag and impurities from the area ...
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3752460 |
The time required for scarfing the surface of a metal body is decreased by shortening the preheating time. This is accomplished by directing a row of "trap" oxygen streams from ports located above the upper preheat fuel gas ports so that...
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3608879 |
Oxygen is blown through orifices against the flash resulting from the scarfing when the flash is still hot and can burn in oxygen. Orifices are provided for the place where the scarfing has started, other orifices for the lateral flash p...
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3515189 |
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3503557 |
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3477646 |
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3455747 |
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3331597 |
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3322578 |
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3249996 |
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3231431 |
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3230116 |
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3172457 |
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3061297 |
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3035947 |
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2897883 |
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2838431 |
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2817611 |
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2812274 |
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2534365 |
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2532103 |
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2500245 |
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2493802 |
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2476456 |
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2441179 |
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2409654 |
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2365308 |
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2363089 |
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