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JPS6380993A |
PURPOSE: To obtain a clad steel pipe without a deterioration of the corrosion resistance by forming a clad steel strip on a pipe stock and impressing a welding current on its edge part and butting it in a heating state and afterward, per...
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JPS6380980A |
PURPOSE: To improve the yield and the welding quality by applying the tensile force on flange material and regulating a welding V angle in the specific range and further, setting the pressure-welding roll diameter according to a prescrib...
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JPS6316224B2 |
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JPS6315071B2 |
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JPS6368282A |
PURPOSE: To realize induction heating equipment capable of controlling a temperature stably by constituting to change gain of a controller in parallel to a ratio of the distance between a heating source and a temperature detector to the ...
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JPS6313797B2 |
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JPS6363580A |
An adjustable length linear bus bar for conducting a current between an induction heating power supply and an induction heating coil. The bus bar includes a fixed bar having a channel formed along the length of the fixed bar and a movabl...
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JPS6363579A |
PURPOSE: To cut the piping without necessitating the chip protection and to improve repairing work efficiency by heating a part of the metal piping up to the neighborhood of the transformation temperature and giving plastic deformation t...
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JPS6352778A |
PURPOSE: To remarkably improve measuring accuracy of the high-frequency voltage by measuring the high-frequency voltage using a resistor for the partial pressure to exclude noise in a measured voltage waveform. CONSTITUTION: A plate volt...
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JPS6352771A |
PURPOSE: To prevent a dimple due to burn through of molten steel and spatters by dipping up and eliminating the molten steel discharged to the inside and outside surfaces and the spatters in edge parts of both sides of a tube stock. CONS...
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JPS6349380A |
PURPOSE: To reduce size of a transformer without magnetizing its peripheral part by providing a power source for a mash-seam welding machine constituted as a high-frequency AC power source and constituting it of the connected transformer...
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JPS6348790A |
A welding control circuit for induction heating of a pair of articles to a welding temperature and for pressing the heated articles together. A pair of induction coils are positioned in a gap between the portions of the articles to be he...
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JPS6343778A |
PURPOSE: To perform the highly efficient welding with high output by measuring a plate AC current and a plate DC current of a vacuum tube and calculating the amplitude of a fundamental wave component of the plate AC current and a harmoni...
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JPS6343777A |
PURPOSE: To prevent an inconvenient immersion into the seam part of a clad material and to prevent the deterioration of the corrosion resistance and mechanical performance by working the edge end face by specifying the clad ratio at the ...
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JPS6343782A |
A method and apparatus is disclosed for purging air from multiple surfaces of members to be welded together. The apparatus includes a hood with the inert gas entering the hood at about 150 cubic feet per minute at between 2-5 pounds per ...
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JPS6340684A |
PURPOSE: To remove the oxide formed on a bead and to improve the bendability of a steel pipe by eliminating the inner face bead on an electric welding weld line in the specific depth amount by gouging at the time immediately after the bu...
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JPS636316B2 |
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JPS6326283A |
PURPOSE: To reduce the thickness difference of a weld zone and base metal part by performing a rolling reduction of both edge parts of a strip plate with a rolling reduction roll and welding them with their bending in a pipe shape after ...
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JPS632717B2 |
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JPS635883A |
PURPOSE: To prevent the deterioration in the corrosion resistance of a weld zone and in the strength characteristic by forcibly cooling the surface of a clad material of the edge heating part from the external part in case of the manufac...
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JPS632574A |
PURPOSE: To avoid oxidation of a weld zone and to prevent ignition by proper mixture of a sheilding liquid with water and to reduce aeration gas by intercepting a weld heating zone from the air by the liquid where either of inert gas or ...
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JPS62296974A |
PURPOSE: To improve the quality of a weld zone and the yield of a product by controlling the welding electric power according to the wall thickness of a blank pipe, the feeding speed of the same, etc., based on the relation of the optimu...
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JPS62292278A |
PURPOSE: To prevent the generation of weld defects and to produce a welded H- beam having high joint strength and excellent quality by disposing insulating ferroelectric magnetic materials on both sides of a high-frequency current flow p...
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JPS62292281A |
PURPOSE: To effectively prevent the occurence of buckling creases of a coil plate and to make the whole of a welded pipe producing device compact by providing a temperature adjusting element to heat or cool said plate to rollers for prod...
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JPS6260462B2 |
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JPS62282787A |
PURPOSE: To considerably extend the life of an induction coil and to improve production efficiency by subjecting a metallic strip to be formed to a pipe shape to removing and cleaning of a rust preventive oil stuck to the surface thereof...
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JPS62282784A |
PURPOSE: To prevent the generation of a spatter by specifying the butt angle of both side end faces of the metal strip subjected to a butt welding. CONSTITUTION: The forming is performed by the adjustment of the rolling roller of the for...
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JPS62277213A |
PURPOSE: To enable the continuous treatment of an external bead formed in the welding process of a steel pipe without any application of manpower by cutting the bead into transportable length with a bead chopper comprising a fixed cutter...
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JPS6257439B2 |
A conductor is installed along a Vee-angle part of a tube to be welded for producing an electric welded tube by high frequency resistance or induction welding. The conductor is set closely above the Vee-angle part. A high-frequency curre...
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JPS62183988U |
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JPS6255477B2 |
A method for pressure bonding metal members by utilizing eutectic reaction comprising the steps of bringing two metal members of dissimilar metals to be bonded into contact with each other under a predetermined contacting pressure P1 low...
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JPS62238083A |
PURPOSE: To make the whole power unit small-sized by feeding to an induction heating coil the generated electric power of medium frequency or high frequency by the rotary type frequency converting device equipping a fly wheel and variabl...
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JPS62234679A |
PURPOSE: To operate continuously a hot rolling mill by providing induction heating coils to the upper and lower surfaces of plates arranged in opposition and pressing the abutting surfaces mutually while induction-heating the abutting su...
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JPS62234677A |
PURPOSE: To improve the yield of a product by preheating the butt edges of a steel strip to an adequate temp., then decreasing welding heat input simultaneously with starting of pipe making and controlling the welding heat input accordin...
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JPS62230490A |
PURPOSE: To improve the toughness of a weld zone by preforming both end edges of a belt-like steel product curved to a tubular shape and butted to each other in such a manner that the cross section has a C or V shape, then subjecting the...
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JPS62227582A |
PURPOSE: To stabilize the operation for long time in the hot production line of a steel pipe by forming the skelp heated within the prescribed temp. range in the cylindrical shape having an open seam and by welding the seam part with a h...
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JPS62220289A |
PURPOSE: To certainly weld even difficult material to weld and to stabilize the quality by forming projections with the specific size on a place to join the plates for the upper and lower flanges to a plate for web and performing the hig...
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JPS62212082A |
PURPOSE: To prevent the generation of a welding defect and to improve pipe expansion and flattening characteristics and a Charpy characteristic by removing the oxides on both side faces opposing to a metal material or an open pipe prior ...
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JPS62203683A |
PURPOSE: To prevent the generation of a welding defect by passing the high frequency current used together with a laser beam intermittently or high- loweringly at the specified time intervals. CONSTITUTION: The intermittently electrifyin...
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JPS62203684A |
PURPOSE: To prevent the welding defect of a product by electrifying intermittently or high-loweringly periodically a high frequency current at the specified time intervals. CONSTITUTION: An electrification period, the ratio of ON period,...
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JPS6241840B2 |
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JPS62187580A |
PURPOSE: To reduce the production cost as well as to improve the stiffness of a weld zone by taking the compression deflection quantity in a press-fitting stage in the prescribed times the plate thickness of a stock at the distance among...
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JPS62176686A |
PURPOSE: To prevent the generation of undercut by performing a re-welding of the seam part by a laser beam by performing a seam welding in the specified upsetting quantity after forming a clad steel plate in a cylindrical shape. CONSTITU...
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JPS62117017U |
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JPS62168683A |
PURPOSE: To save labor and to improve safety by providing a pair of the upper and lower feed rollers made of metal and by arranging the 1st driving means which moves both rollers between the approaching and separating positions and the 2...
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JPS62168684A |
PURPOSE: To improve the safety and to save labor by arranging the guide pipe which leads a chip into the main body and the inlet port for chip lead-in on a chip crusher. CONSTITUTION: The chip of the outer side bead caused in the product...
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JPS62113880U |
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JPS6233032B2 |
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JPS6233028B2 |
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JPS62158575A |
PURPOSE: To prevent wear, burning, etc., of an equipment, to improve the productivity, and also to reduce the manufacturing cost by covering a weld point and its adjacent high temperature area with a foam containing a non-oxidizing gas. ...
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