NETUREN CO., LTD. Patent applications |
Patent application number | Title | Published |
20160136712 | HEATING METHOD, HEATING APPARATUS, AND HOT PRESS MOLDING METHOD FOR PLATE WORKPIECE - A heating method, a heating apparatus, and a hot press holding method for a plate workpiece are provided. The plate workpiece has a first region and a second region. A cross sectional area of the first region in a widthwise direction of the plate workpiece is substantially uniform along a longitudinal direction of the plate workpiece or is monotonically increased or decreased along the longitudinal direction. The second region is adjoining a portion of the first region in a monolithic manner. The method includes heating the second region, and heating at least the first region by direct resistance heating along the longitudinal direction. The second region is heated before heating the first region such that the first region and the second region are heated to be in a given temperature range. | 05-19-2016 |
20160123451 | METAL CORE FOR RESIN GEAR AND RESIN GEAR COMPOSITE MEMBER - A metal core for a resin gear and a resin gear composite member are provided. The metal core includes a boss portion into which a shaft is press-fitted, a ring portion to which an outer peripheral resin is joined, and a connecting portion via which the boss portion and the ring portion are coaxially provided. The boss portion is arranged on one side of the connecting portion at an inner circumference of the connecting portion and extends annularly in an axial direction. The ring portion is arranged on the same side of the connecting portion at an outer circumference of the connecting portion and extends annularly in the axial direction. The boss portion, the connecting portion, and the ring portion are formed of an integrally continuous material. The boss portion is thicker than the connecting portion and the ring portion. | 05-05-2016 |
20160121439 | METHOD OF MANUFACTURING METAL CORE FOR RESIN GEAR - A method of manufacturing a metal core for a resin gear is provided. The metal core has a boss portion into which a shaft is press-fitted and a ring portion to which an outer peripheral resin is joined. The method includes swaging a plate material having a center hole by pressing the plate material in an axial direction to form a swaged body, and forging the swaged body by pressing the swaged body in the axial direction under a higher pressure. The swaging includes deforming a portion around the center hole in the axial direction to form an inner circumferential swaged portion, and deforming an outer circumferential portion of the plate material in the same axial direction to form an outer circumferential swaged portion. The forging includes forming the inner circumferential swaged portion into the boss portion, and forming the outer circumferential swaged portion into the ring portion. | 05-05-2016 |
20160119979 | Core metal for resin welding, composite member and method of manufacturing the same - The core metal for resin welding improves bonding strength between an outer peripheral resin member and the core metal. The outer peripheral resin member | 04-28-2016 |
20160076117 | WELDING METHOD AND WELD STRUCTURE - Object of the present invention is to provide a welding method prevented the fracture at the spot welding zone by recovering the strength of a spot welding zone, namely, the ductility and the toughness in the spot welding zone, and a weld structure manufactured by the method. In the welding method, a spot welding zone provided with a weld nugget | 03-17-2016 |
20150345128 | REINFORCED CONCRETE STRUCTURE - A main reinforcing bar has a strength transition portion between a normal strength portion and a high strength portion. The high strength portion is arranged in a joint section. The boundary between the normal strength portion and the strength transition portion is configured as a deigned point. The designed point is designed such that, at the time of an earthquake, the main reinforcing bar yields at the designed point before the main reinforcing bar yields at the root of the beam at of the joint section. The boundary between the high strength portion and the strength transition portion is located in the joint section, and the root of the beam is located at the strength transition portion. The strength of the strength transition portion at the root of the beam is equal to or higher than the required strength. | 12-03-2015 |
20150306696 | WELDING EQUIPMENT FOR METALLIC MATERIALS AND METHOD FOR WELDING METALLIC MATERIALS - A welding equipment for metallic materials capable of performing heat treatment such as tempering based on partial heating in spot welding is provided. The welding equipment sandwiches metallic materials with a pair of electrodes, and heats different regions of the metallic materials by energization, with the pair of electrodes maintained at the same position with respect to the metallic materials. The welding equipment includes a first heating means connected to the pair of electrodes for heating and welding the internal region of the circle defined by projecting the cross-sectional area of the axis of the electrodes on the metallic materials by applying power having a low first frequency, a second heating means for heating a ring-shaped region along the circle by applying power having a second frequency that is higher than the first frequency, and an energization control unit for independently controlling the first and the second heating means. | 10-29-2015 |
20150296572 | HEATING COIL AND HEAT TREATMENT APPARATUS - A heating coil 21 includes: at least a set of heating conductors 23, 24, one of which is arranged at a side of a work 10 and the other one is arranged at an opposite side of the work 10; and a plurality of connecting conductors 29 to connect an end of one of the heating conductors 23, 24 with an end of the other heating conductor 23, 24, wherein the set of heating conductors 23, 24 faces a part of the work 10, each of the heating conductor 23, 24 is connected with at least two connecting conductors 29; and the connecting conductors extend from an end of each of the heating conductor 23, 24 in a different direction from each other. | 10-15-2015 |
20150276037 | HOLLOW RACK BAR AND METHOD OF MANUFACTURING HOLLOW RACK BAR - A hollow rack bar and a method of manufacturing the hollow rack bar are provided. The hollow rack bar includes a hollow blank pipe portion having a uniform wall thickness, and a rack toothed portion. The rack toothed portion includes teeth, a flat portion having a flat surface and arranged side by side with the teeth in a direction along a center axis of the blank pipe portion, and a slanted portion provided at an end of the flat portion with respect to a direction perpendicular to the center axis and arranged to be lower than the flat portion. A length of the slanted portion projected on a straight line perpendicular to the center axis and parallel to the surface of the flat portion is longer than zero and equal to or shorter than the wall thickness of the blank pipe portion. | 10-01-2015 |
20150034628 | INDUCTION HARDENING CONTROL SYSTEM - The present invention includes: a hardening control unit ( | 02-05-2015 |
20140144904 | INDUCTION HEATING DEVICE, INDUCTION HEATING EQUIPMENT, INDUCTION HEATING METHOD, AND HEAT TREATMENT METHOD - An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece, even a large workpiece, can be readily and approximately uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated H | 05-29-2014 |
20140083223 | RACK BAR AND RACK BAR TEETH FORMING DIE - A rack bar includes a shaft portion and a rack toothed portion provided on the shaft portion. The rack toothed portion includes a plurality of rack teeth provided side by side in an axial direction of the shaft portion to mesh with a pinion gear. Each of the rack teeth includes a tooth tip portion, a contact face arranged obliquely relative to the axial direction and configured to contact the pinion gear, and a rounded corner portion between the tooth tip portion and the contact face. A first radius defining a central area of the rounded corner portion with respect to a tooth width direction is larger than a second radius defining another area of the rounded corner portion other than the central area. | 03-27-2014 |
20130305652 | REBAR STRUCTURE AND REINFORCED CONCRETE MEMBER - A rebar structure includes a plurality of column longitudinal bars to be connected to a beam. The yield point or the 0.2% proof stress of at least a portion the column longitudinal bars is larger than the yield point or the 0.2% proof stress of a normal reinforcing bar defined by JIS G 3112. | 11-21-2013 |
20130300405 | QUENCHING DEPTH MEASUREMENT METHOD AND QUENCHING DEPTH MEASUREMENT APPARATUS - A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed. | 11-14-2013 |
20130252014 | CORE METAL FOR RESIN WELDING, COMPOSITE MEMBER AND METHOD OF MANUFACTURING THE SAME - The core metal for resin welding improves bonding strength between an outer peripheral resin member and the core metal. The outer peripheral resin member | 09-26-2013 |
20130140299 | HEATING COIL - A heating coil includes a pair of linear lead portions adapted to be connected to a power supply, and a ring-shaped or coil-shaped head portion having end portions connected to the lead portions respectively. A flow path through which a cooling medium flows is formed inside the lead portions and the head portion. An outer circumferential surface of the head portion has a circular or elliptical cross section and is configured to face a heating target portion of an inner circumferential surface of a work extending, the heating target portion extending in a circumferential direction of the work. Each of the lead portions has a straight side portion in a plane intersecting a longitudinal direction of the lead portions, the straight side portions of the lead portions being arranged in proximity to each other. | 06-06-2013 |
20130125689 | MANDREL, SET OF MANDRELS, AND HOLLOW RACK BAR - The present invention includes a bar having a maximum cross section region smaller than a minimum cross section region of a hollow portion of a pipe P, and projected portions mounted along an axial direction of the bar and including a projected portion with maximum extent Hb, extent Ha of the projected portion positioned at a leading end side of the bar is set to be smaller than extent Hb of the projected portion positioned at a center side in the axial direction, and extent Hc of the projected portion positioned at a base end side of the bar is set to be less than or equal to extent Hb of the projected portion. | 05-23-2013 |
20120234824 | Heating Apparatus, Heat Treatment Apparatus, and Heating Method - A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil. | 09-20-2012 |
20120129006 | WELDING STRUCTURAL PART AND WELDING METHOD OF THE SAME - A welding structural part | 05-24-2012 |
20120125919 | INDUCTION HARDENING APPARATUS, INDUCTION HARDENING METHOD, INDUCTION HEATING COIL, HEAT TREATMENT APPARATUS, AND HEAT TREATMENT METHOD - According to an embodiment, an induction heating coil includes a heating conductor portion which is formed of a conductor member and has a zigzag shape in which a bent portion opened to one side in a first direction and a bent portion opened to the other side in the first direction are alternately continuously arranged in opposite directions along a second direction crossing the first direction. | 05-24-2012 |
20120118440 | HIGH-STRENGTH AND HIGH-DUCTILITY DIE-QUENCHED PARTS AND METHOD OF MANUFACTURING THE SAME - A high-strength die-quenched part | 05-17-2012 |
20120103120 | Hollow Rack and Hollow Rack Manufacturing Method - The one end side portion is nipped by a jig including a jig member having a pair of convex portions which are to be fitted to a depressions in contact with a tooth side face and a inclined portion and positioning a bar and a jig member which is to be clamped/opened with respect to the jig member. A die having an inside diameter smaller than the diameter of the outer periphery is pressed onto the outer periphery of the end portion of the cylindrical end side portion projected from the jig up to a press-in depth determined preliminarily based on the rack, so as to reduce the diameter of the end portion. | 05-03-2012 |
20120102739 | Hollow Rack End Diameter Reducing Method - The one end side portion is nipped by a jig including a jig member having a pair of convex portions which are to be fitted to a depressions in contact with a tooth side face and a inclined portion and positioning a bar and a jig member which is to be clamped/opened with respect to the jig member. A die having an inside diameter smaller than the diameter of the outer periphery is pressed onto the outer periphery of the end portion of the cylindrical end side portion projected from the jig up to a press-in depth determined preliminarily based on the rack, so as to reduce the diameter of the end portion. | 05-03-2012 |
20120097663 | INDUCTION HARDENING CONTROL SYSTEM - The present invention includes: a hardening control unit ( | 04-26-2012 |
20110303655 | WELDING EQUIPMENT FOR METALLIC MATERIALS AND METHOD FOR WELDING METALLIC MATERIALS - A welding equipment for metallic materials capable of performing heat treatment such as tempering based on partial heating in spot welding is provided. The welding equipment | 12-15-2011 |
20110132060 | Enlargement Processing Method for Workpiece - A workpiece enlarging method is provided, by which an enlarged portion can stably be formed on a portion of a workpiece such as a shaft member, and a drive force required to form the enlarged portion can be reduced. The workpiece enlarging method forms the enlarged portion on the workpiece (W) by applying, with respect to the workpiece (W), alternating shear energy in a transverse direction thereof so as to suppress deformation of the workpiece (W) within an elastic limit while applying compression energy that produces compressive stress equal to or greater than an initial yield strength to increase internal energy of the workpiece (W), thereby decomposing a portion of the increased internal energy by the alternating shear energy and deforming and enlarging the enlargement intended area of the workpiece (W) with the assistance of the decomposed energy obtained by the decomposition. | 06-09-2011 |
20110017368 | Steel Material, Process of Fabricating Steel Material, and Apparatus of Fabricating Steel Material - According to one aspect of the present invention, there is provided a process of fabricating a steel material by performing a heat treatment to a steel material having high strength, in order to reduce hardness at one part of the steel material to less than hardness at other parts of the steel material, wherein the heat treatment comprises a heating step in which a portion having a certain depth from a surface of the steel material is rapidly heated by induction heating or direct energization heating, and a cooling step in which the steel material, which has been subject to the heating step, is rapidly cooled a predetermined time after the heating step, and a heating temperature in the heating step is Ac1 transforming point or more. | 01-27-2011 |
20100258553 | INDUCTION HARDENING MONITORING APPARATUS - An induction hardening monitoring apparatus ( | 10-14-2010 |
20100051611 | METHOD AND DEVICE FOR INDUCTION HEATING AND HARDENING APPARATUS - A hardening apparatus ( | 03-04-2010 |