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JPH01130887A |
PURPOSE: To measure the welding electric power with high accuracy in real time by multiplying the plate high-frequency voltage obtained by dividing a DC component and a high-frequency component by a plate high-frequency current. CONSTITU...
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JPH0172984U |
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JPH01107981A |
PURPOSE: To improve the quality and yield of a product by adjusting heating frequency of induction heating in a specific range according to the variation of traveling speed of band steel in the removal of burrs generated by induction hea...
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JPH01104483A |
PURPOSE: To eliminate the need for an interior bead removing device after welding and to improve productive efficiency by pressing a fine ceramic shoe against the pipe interior side in the vicinity of a welding point to restrain melt- th...
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JPH0120922B2 |
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JPH0120923B2 |
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JPH0118833B2 |
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JPH0115354B2 |
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JPS6471581A |
PURPOSE: To prevent a decline of flow rate of a water pipe and to reduce its maintenance expenses by inserting an Al alloy coil into an old water pipe while forming it spirally and filling a filler in a spiral pipe and the old pipe. CONS...
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JPH019110Y2 |
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JPH019111Y2 |
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JPH019109Y2 |
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JPH017996Y2 |
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JPS646973Y2 |
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JPS649929B2 |
Inductors for the induction welding of complicated welding patterns have been produced up to now mostly from copper plates which were provided with slits in the desired patterns by spark-cutting and embedded into plastic material. This m...
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JPS6440184A |
PURPOSE: To improve workability and yield of warm resistance welding by specifying a gap between a tubular body formed tubularly and a work coil to feed the tubular body and enabling to manufacture a steel pipe at the same speed as ordin...
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JPS6420982U |
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JPS645590U |
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JPS63309384A |
PURPOSE: To reduce a width of a heat-affected zone and to reduce the strain by magnetic-shielding the magnetic flux generated by applying a high-frequency current to a superconducting coil by a superconducting material and improving its ...
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JPS63174980U |
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JPS6342115Y2 |
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JPS63256284A |
PURPOSE: To obtain stabilized welding conditions by providing the wier of the disk shape elastic body bending the thinned circumferential part in the opposite direction to an impeder on the supporting device at the side of the impeder ar...
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JPS63157486U |
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JPS63150774U |
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JPS63145590U |
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JPS63145591U |
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JPS63215387A |
PURPOSE: To effectively perform heating and annealing without causing a temperature drop after welding at the narrow space by arranging high-frequency induction heating equipment close to the hind part in the proceeding direction of a we...
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JPS6331511Y2 |
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JPS63127781U |
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JPS63192574A |
High frequency resistance spot welding structure and method. In one embodiment, the structure includes dual, mirror image welding transformers, each including a transformer secondary circuit, an endless transformer core, and a transforme...
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JPS63183785A |
PURPOSE: To properly use a vacuum tube up to its service life limitation by measuring the grid AC voltage and the plate AC voltage at the time of starting or finishing to apply a plate AC current of the vacuum tube to calculate an amplif...
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JPS6338277B2 |
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JPS63180457A |
PURPOSE: To efficiently remove the welding burrs formed at a seam part in a short time and eliminate the quality disorder and improve yield by arranging polishing machines above and below a strip and moving said machines in reciprocation...
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JPS6336875B2 |
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JPS63174785A |
A method is described for manufacturing helically formed pipe (10) from strip material (11). One side of the strip material (11) is formed to provide a first side flange (12) that projects substantially 90 DEG relative to the plane of th...
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JPS6335357B2 |
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JPS63154278A |
PURPOSE: To obtain a weld zone with the satisfactory quality without the bead skin by removing a weld bead by high-pressure gas in advance in the neighborhood of the pressurization position of squeeze rolls and afterward, forming the ins...
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JPS6395618U |
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JPS63144876A |
PURPOSE: To improve the quality of a weld zone by first forming a groove on clad material with low thermal conductivity and then, performing the high-frequency resistance welding on base metal with high thermal conductivity and lastly pe...
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JPS63132781A |
PURPOSE: To stably obtain an electric welded tube with the excellent quantity by cooling electric welded tube manufacturing equipment by liquefied inert gas or/and liquefied neutral gas to manufacture the tube. CONSTITUTION: The liquefie...
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JPS63132784A |
PURPOSE: To abbreviate a process and to obtain a wear resistant seat part under high temp. and high pressure by abutting the compact containing a specified component to a cylinder head and depositing it with high frequency heating. CONST...
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JPS63119990A |
PURPOSE: To reduce the incidence of defect by deviating the range of welding heat input added to a butting part by specific % up and down with respect to the welding heat input of a welding flash starting point to control it between the ...
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JPS6323856B2 |
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JPS6323857B2 |
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JPS6366586U |
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JPS6397372A |
PURPOSE: To straighten torsion without stopping a line by horizontally moving the side guide roller just before the final roll of fin pass according to the torsion amount of the seam welding of a resistance welded pipe detected just afte...
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JPS6397373A |
PURPOSE: To gradually cool a weld zone by making it in good quality and to reduce the cost by arranging a low frequency preheating coil interpolating a composite impeder at the front of the electric welded pipe manufacturing device press...
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JPS6397370A |
PURPOSE: To improve the speed and productivity of the welding by arranging an insulating ferromagnetic body with the specific length, width and height on a high-frequency resistance weld zone where a metallic body is close to each other ...
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JPS6397371A |
PURPOSE: To improve the stiffness at electric welded steel pipe weld zone by leaving the oxide powder in specified grain size range by its blowing with carrier gas at the seam welding butt part of the high stiffness strip steel having ex...
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JPS6362289U |
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