The present invention provides a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Organic light-emitting device

A pressure relief valve system for use in a downhole operation may include a pressure relief valve configured to relieve pressure from high pressure tubing extending between a pump and a wellhead, and may include a sensor operably disposed to detect pressure in the high pressure tubing. The pressure relief valve system also may include a controller having a pressure threshold stored therein. The controller may be configured to receive data from the sensor and compare the detected pressure to the stored pressure threshold. A valve actuation system may be in communication with the pressure relief valve and in communication with the controller. The valve actuation system may be configured to change the state of the pressure relief valve from a closed state to an open state in response to a command signal from the controller.

Automated relief valve control system and method

Disclosed is a press forming method press forming a workpiece between a die and a punch, while pushing the punch into the die by means of a relative motion of the die and the punch, the method includes: producing an intermediate molding having ridges formed in predetermined parts of the workpiece, and then press forming the intermediate molding into a final shape, to thereby substantially thicken and work-harden the predetermined parts of the workpiece.

Press forming method and vehicle component

A swivel joint has uniform ball bearing requirements for all bearing races. The swivel joint has a male connector and a female connector that coaxially interconnects and swivel relative to each other while still maintaining a high pressure seal. Each connector has three bearing races to form three sets of bearing races, each of which supports the same number of ball bearings. The circumference of the main set of races are enlarged by less than the diameter of one ball, so it is impossible to add another ball to the coupled male and female connectors of the swivel joint.

Swivel joint with uniform ball bearing requirements

A plug valve including a valve body having an inlet port, an outlet port and a central chamber extending between the inlet port and the outlet port. The valve also includes an inlet seal segment within the central chamber and includes a bore extending therethrough and aligned with the inlet port. An outlet seal segment is disposed within the central chamber having a bore extending therethrough and aligned with the outlet port. A plug member is disposed in the central chamber and is moveable between an open position, to facilitate fluid flow through the plug valve, and a closed position, to block fluid flow through the plug valve. First and second side segments are disposed between and interlocked to the inlet and outlet seal segments to encircle the plug member. The side segments are tensioned to preload the seal segments against the plug member to prevent the flow of fluid between the seal segments and the plug member.

Plug valve having preloaded seal segments

PROBLEM TO BE SOLVED: To provide a method by which a shape of press-formed goods excellent in the accuracy of pres forming is obtained by a simple press-forming method without depending on empirical estimated generation of springback. SOLUTION: In a press-forming stage of a metallic sheet where the sheet reaches the final shape of press-formed goods through a plurality of press-forming stages, the accuracy of forming is improved by suppressing the springback after forming by performing press-forming with a die having a size which is smaller by at least 1 mm than the size by which the shape of the portion is specified about a portion where a tensile residual stress is generated and performing the press-forming with a die having a size which is larger by at least 1 mm than the size by which the shape of the portion is specified about the portion where compressive residual stress is generated. This method is applicable to a ridge line part and a vertical wall part. COPYRIGHT: (C)2007,JPO&INPIT

Method for press-forming metallic sheet

PROBLEM TO BE SOLVED: To provide a method by which breaking strain generated in the end part of a flange when forming a stretch flange is specified accurately. SOLUTION: A plate-like test-piece 1 in the end part of which a notch 6 is formed is set to a side bend testing machine and, by making it break by imparting in-plane tension and bending, and strain, a strain gradient and strain concentration in the broken part are measured. Data are collected by using two or more kinds of the plate-like test-pieces 1 which are changed in the strain gradient from the end part of a plate to the inside and the strain concentration along the plate end part, which are generated when applying load are changed and the breaking strain is specified as the function of the strain gradient and the strain concentration, or a map of the strain gradient and the strain concentration. COPYRIGHT: (C)2011,JPO&INPIT

Method of specifying breaking strain of plate-like material

PROBLEM TO BE SOLVED: To improve workability by restraining an uneven wall and ductile deterioration at the time of bending, in the case of putting a metal tube such as a steel tube or the like into segmental dies after bending and hydroforming into a prescribed shape while applying pressure into the tube and thrusting in the axial direction of the tube. SOLUTION: A spherical body-like floating plug having a larger diameter than the inner diameter of a straight tubular tube stock 1 is installed to the chip end of a round bar-like core bar having a smaller diameter than the inner diameter of the tube stock 1 so that the center of the floating plug is movable in the optional direction within a given range with respect to the axial center of the core bar, the core bar is inserted into the tube stock 1, and the floating plug and the tube stock 1 are relatively moved under the state that the floating plug is eccentric to the core bar. Whereby, bending is executed while expanding the tube within the tube expansion ratio of 5-12% to obtain a bent tube 2, next the bent tube 2 is put into segmental dies 4, 5, pressure is applied into the tube, and the tube is worked into the prescribed shape while thrusting in the axial direction of the tube. COPYRIGHT: (C)1998,JPO

Hydroforming method of tube

PROBLEM TO BE SOLVED: To accurately analyze a portion where is the cause of occurrence of the spring-back in a press-formed article by numerical analysis. SOLUTION: By performing the analysis of press forming by a numerical simulation on the basis of the forming conditions of a press-formed article and, about stress data including forming data, decomposing at least into an in-plane stress component and a bending moment component against at least one in the direction of each direction component of stress over the whole of the press-formed article, an independent resolved data is produced. Next, by performing the area dividing of the press-formed article and performing an arithmetic processing in which a coefficient is multiplied to at least one of each direction component of the stress of the independent resolved forming data for each area, the independent resolved forming data is produced. By performing spring-back analysis on the basis of these data by the numerical simulation, an influence degree to the spring-back deformation of the stress in each calculated area is determined from the shape before the spring-back and the springback shape which is determined from the independent resolved forming data to which the arithmetic processing is performed and displayed. COPYRIGHT: (C)2009,JPO&INPIT

Method of analyzing cause of occurrence of spring-back, its device and its program, and recording medium

PROBLEM TO BE SOLVED: To provide a press forming method of an L-shaped component capable of press forming the L-shaped component with a high yield from a material metal plate even when a high strength high-tensile material with low ductility is used as the material metal plate.SOLUTION: The method of forming the L-shaped press component is the method for forming the component having a top plate part, and a vertical wall part connected to the top plate part through a bent part having a portion curved in an arc shape and having a flange part on the side opposite from the bent part, wherein the outer side of the arc of the vertical wall part is the top plate part. The material metal plate is arranged between a die and a pad and a bending die, and the vertical wall part and the flange part are formed while sliding at least a part of the material metal plate on a portion corresponding to the top plate part of the die in the state that the pad is approached or brought into contact with the material metal plate.

隆司宮城

Papers

Method for press-forming metallic sheet

Method of specifying breaking strain of plate-like material

Hydroforming method of tube

Method of analyzing cause of occurrence of spring-back, its device and its program, and recording medium

Method of forming press component

隆司 宮城

Papers

Method for press-forming metallic sheet

Method of specifying breaking strain of plate-like material

Hydroforming method of tube

Method of analyzing cause of occurrence of spring-back, its device and its program, and recording medium

Method of forming press component

隆司宮城