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JP2000119749 |
To produce a Cr-Mo seamless steel pipe free from the dispersion of strength and excellent in toughness by a simplified producing process.In the case of heating a billet contg. 0.10 to 0.25% C, ≤1.0% Si, 0.2 to 2.0% Mn, ≤0.020% P, ≤...
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JP3058025 |
PURPOSE: To provide the easy, safe and precise aligning method. CONSTITUTION: In the aligning method of rolling mill which executes measurement from the reference face of a housing 1 by use of a jig 14, while the jig 14 is placed between...
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JP3042123 |
PURPOSE: To obtain the subject compound useful as an insecticide or its intermediate in high yield while minimizing the formation of by-product by reacting an N-cyanoacetamidate with a specific amine derivative in a solvent comprising wa...
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JP3040644 |
PURPOSE: To prevent an exposure unit from being separated from a main body part even when a film unit with a lens is shocked from the outside. CONSTITUTION: A pin 53 and a pin paired with the pin 53 are integrally formed inside a front c...
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JP3040643 |
PURPOSE: To improve the operability of a laser beam printer which uses a semiconductor laser for both writing and reading in common by performing the writing and reading in one rotation of a movable mirror, and only switching laser light...
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JP3036356 |
PURPOSE: To manufacture a seamless tube without the occurrence of a defect even in the case of a high expansion ratio. CONSTITUTION: A billet B is fed in the axial length direction, is rotated helically and is moved by the rotations of b...
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JP2000051904 |
To provide a size-free rolling method of metallic materials in which the finished cross-sectional shape in the outer peripheral part is approximately complete roundness, the uneven diameter difference is extremely small and the cross-sec...
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JP3033406 |
PURPOSE: To speedily set a delay time by selecting an optional note among plural note kinds, calculating the length of the note from a tempo and the selected note, and setting the calculation result as the delay time. CONSTITUTION: The t...
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JP2000024704 |
To prevent the generation of flaws on an outer peripheral surface of a tube body even in cold-rolling the tube body made of not limited to ordinary steel but high alloy steel by replacing lower shoes of guide shoes for a reeler in the pr...
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JP2000024705 |
To provide a manufacturing method of a seamless steel tube by a plug mill tube-making line by which the generation of a carburized layer on the inside surface is suppressible and seamless alloy steel tube excellent in corrosion resistanc...
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JP2000024706 |
To provide a manufacturing method of a seamless steel tube by a mandrel mill tube-making line by which the generation of carburized layer on the inside surface is prevented even when a mandrel bar to which graphite is stuck is used and s...
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JP2000024703 |
To prevent the generation of flaws on outer peripheral surface of a tube body even in case of cold-rolling the tube body made of not limited to ordinary steel but high alloy steel by executing the grinding of the tube body and shape corr...
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JP3024284 |
PURPOSE: To fix an integrated circuit terminal simultaneously with connection alignment without causing positional dislocation or disconnection, or without causing a terminal unit to short-circuit to a substrate even if the integrated ci...
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JP3020283 |
PURPOSE: To prevent excess toner from sticking to a photosensitive drum and to prevent contaminant such as dust on the surface of a sheet paper where an image is developed and fixed. CONSTITUTION: In a developing system for electrophotog...
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JP3020284 |
PURPOSE: To shorten the fault restoring time in a self-heating method where each node autonomously and dispersedly restores in a network. CONSTITUTION: The nodes 11 and 12 of a faulty terminal first serve as senders to broadcast a retrie...
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JP2000000605 |
To manufacture a pipe without causing cost increase even for a hardly workable material or the like and without remaining a flaw on the pipe inner face by obliquely piercing and rolling a round cast metal as casting by using a plug and p...
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JP11347605 |
To prevent the inner face of a tube to be rolled from generating a crack by making a Q value and T. Red a specific value so that tensile stress generated at a Pilger rolling time is crossed to metal fibers by using a base tube is which t...
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JP3003522 |
PURPOSE: To provide a harness-equipped electronic parts in which there is reduced the number of part items and in which there are securely connected terminals and a harness provided on a casing with each other. CONSTITUTION: Grooves 16, ...
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JP11314106 |
To automatically remove iron pieces stuck after burning to the outer peripheral surface of a roll without dismounting inclined rolls from the main body of the mill in the inclined roll mill provided with the inclined rolls which are arra...
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JP11310822 |
To provide a method for producing a martensitic stainless steel tube having high strength of >650 MPa yield stress and having excellent low temp. toughness. Martensitic stainless steel having a compsn. contg., by weight, 0.15 to 0.22% C,...
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JP11310823 |
To provide a method of manufacturing a martensitic stainless steel tube having high strength of which the yield stress exceeds 650 MPa and also having excellent toughness at a low temperature. After martensitic stainless steel which has ...
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JP2998605 |
To obtain a piercing device in which the tip of a plug is prevented from eroding by using an analysis model in a piercing method of a seamless metallic tube. In a piercing device, the temp., which is measured with a temp. measuring devic...
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JP2998395 |
PURPOSE: To prevent the bottom of a tube from being cut off without generating inside scratches and blocking the bottom, improve the rolling efficiency and carry out high quality of rolling. CONSTITUTION: The terminal of a tube material ...
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JP2994159 |
PURPOSE: To improve the roundness without changing rolls at an arbitrary external diameter by rotating and revolving plural recessed rolls having a radius larger than a pipe radius each. CONSTITUTION: Plural inclinable recessed rolls hav...
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JP2994202 |
PURPOSE: To manufacture a steel tube having high roundness over the entire length by dividing sizer rolls of the final stand into four in the circumferential direction of pipe and executing drawing by changing the ratio of the base diame...
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JP11285708 |
To provide a method and apparatus by which tensile stress in a core of a material to be worked is minimized or burst of the material to be worked is avoided. A 3-roll rotary piercer for forming hollow billets is provided with a mandrel 4...
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JP11277110 |
To manufacture various kinds of square pipes with the same forming rolls by canceling rotational force in the circumferential direction which is the cause of twist which is liable to generate on pipe stocks by the inclination of forming ...
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JP11244913 |
To provide a piercer capable of improving the service life of a plug and the quality of the inside surface of a material to be pierced in the piercing stage of a metallic long colume body. In this device, the plug 1 is made into the shap...
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JP2973885 |
To obtain a method for drawing, reducing and sizing a seamless metallic tube by which defective bar stripping is not generated even when drawing, reducing and sizing are executed, by using a size capable of interstand tension imparting r...
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JP11197715 |
To enlarge the possible manufactural length of a seamless steel tube. In the boring method of the seamless steel tube by an inclined roll, a boring plug 2 is arranged so that the maximum diameter part 2a is positioned in a gorge part 1b ...
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JP11188408 |
To stably manufacture electric-resistance-welded steel pipes with superior roundness without reducing the manufacturing efficiency with necessary minimum rolls by reducing the weld zone with horizontal rolls immediately after heating/sof...
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JP11169914 |
To prevent the generation of internal carbunization and also to improve the quality of the inside surface by regulating the temp. of the inside of a material to be pierced just before rolling with the 2nd piercer (elongator) within a ran...
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JP11123420 |
To absorb the fluctuation of a rolling load at the time of an abnormal rolling in manufacturing a seamless steel tube, and to simply repair the equipment of the rolling mill. On the rolling down device of this rolling mill, hydraulic cyl...
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JP11114609 |
To obtain a rolling mill to cope with the production of small quantities in many kinds of seamless steel tubes sized from a small diameter to a large diameter by providing a means of turning a cannon holder and making it travel along a p...
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JP11090511 |
To provide the method and device for manufacturing a seamless steel tube made of an Fe-base alloy whose Cr content is <15 wt.%, which are immediately applicable to existing manufacturing equipment by which a product steel tube reduced in...
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JP11077117 |
To increase the relative thermal capacity ratio of a piercing plug, to suppress the loss of the plug including the loss of the tip and surface roughening of the trunk part and to prolong the life by taking the crossing angle of inclined ...
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JP11057842 |
To obtain a method of manufacturing a steel pipe; wherein a special adjustment of measurements of the pipe is substantially not required for a final cold finishing working, and compressive strength in the direction of the pipe's length i...
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JP11050148 |
To obtain a steel pipe with high strength and high corrosion resistance by subjecting a steel having a specified componental compsn. to steel pipe forming and direct quenching under specified conditions and refining it to required streng...
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JP10314812 |
To provide a manufacturing method of a seamless tube that is excellent in the durability of piercing plug. In this manufacturing method, a billet is arranged on the pass line of roll which are arranged obliquely to the advancing directio...
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JP10286620 |
To provide a manufacturing method for a welded steel pipe by which yield ratio in the axial direction of the tube that is only raised in the manufacturing process in a conventional method is lowered. In the manufacturing method of the we...
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JP10249412 |
To obtain a piercing plug for a seamless metallic tube which restricts an adopted fault generating on the inside surface of a product tube and which does not reduce the life of the plug by making the thickness of scale skin film of a ree...
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JP10249409 |
To manufacture plural kinds of metallic tube with spiral projections having different wall-thickness without changing rolling rolls. In this manufacturing method, a solid metallic bar or metallic tube of hot pierced or stretched with a s...
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JP10237604 |
To prevent cracking at the time of blooming and to provide excellent sulfide stress cracking resistance by specifying respective contents of C, Si, Mn, P, S, Cr, Ni, Al, N, Mo, and Cu and also specifying cast bloom temp. in the course of...
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JP10235422 |
To effectively improve the bar-stripping property even when the coefficient of friction between a mandrel bar and a shell is varied by changing the properties of the surface of the mandrel bar. Tension which acts on the shell A between m...
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JP10235413 |
To provide a method and device for manufacturing a seamless steel tube by which the life of a plug used for piercing is drastically prolonged. In the manufacturing method of the seamless steel tube including hot piercing stage, at the ti...
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JP10224090 |
To suppress incorrect follow-up of a cam follower with respect to a tubular cam while enhancing durability through a simple structure by constructing means for urging one cam follower toward the tubular cam side of a leaf spring. Under a...
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JP10180313 |
To roll a hard-to-work tube stock such as Ni-base alloy without generating plastic deformation on a mandrel. This rolling method is composed so that the tube stock H is drawn while imparting tensile force to the tube stock H from the fro...
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JP10180311 |
To provide a method for preventing the slip of piercer rolls by jetting a slip preventing agent to a round bar and the piercer rolls in piercing with a piercer. In the method for preventing the slip of the piercer rolls 1, the current va...
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JP10180310 |
To prevent generation of inside surface scratch of steel tube and to manufacture seamless tube with excellent inside surface skin by manufacturing a rolling stock for seamless tube of specified shape and then piercing rolling the rolling...
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JP10180312 |
To prevent generation of defects such as crack in the end part of a tube stock and the like due to δ ferrite at the time of piercing rolling of cast billet for seamless tube with a piercer by rolling billet under satisfying specified co...
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