Abstract: A forming apparatus which forms a metal pipe by expanding a metal pipe material, includes: a forming die for forming the metal pipe; a first electrode and a second electrode which clamp the metal pipe material at both end sides and heat the metal pipe material by causing an electric current to flow through the metal pipe material; and a first fluid supply unit and a second fluid supply unit which supply a fluid into the metal pipe material heated by the first electrode and the second electrode to expand the metal pipe material, wherein at least one of the first electrode and the second electrode is provided with a movement restriction mechanism which restricts a movement of the metal pipe material in an axial direction of the metal pipe material.

Abstract: A molding apparatus capable of improving the quality of a molded article is provided. A control section controls a blowing mechanism to expand and mold a metal pipe material by supplying gas into the metal pipe material held between an upper mold and a lower mold by a pipe holding mechanism. The control section controls a driving section to mold a flange portion by crushing a second molded portion of the expanded metal pipe material in a sub-cavity portion between the upper mold and the lower mold. In a molding apparatus, the control section changes movement speed of a slide during the molding of the flange portion by controlling a servomotor. Accordingly, it becomes possible to control an operation of pressing at an appropriate movement speed according to the shape or the like of the flange portion. Accordingly, it is possible to improve the quality of a molded article.

Abstract: A disclosed forming system is a forming system which expands and forms a metal pipe in a die. The forming system includes a preliminary forming apparatus which preliminarily forms a metal pipe material, a forming apparatus which includes a gas supply unit which supplies gas into the preliminary-formed and heated metal pipe material to expand the metal pipe material and a main body portion to which the die is attached, and a cutting device which cuts at least a portion of the formed metal pipe. The gas supply unit is provided so as not to be disposed on a first straight line which connects the preliminary forming apparatus and the main body portion in a plan view and a second straight line which connects the cutting device and the main body portion in a plan view.

Abstract: A forming system includes: a forming apparatus which supplies gas into a cylindrical metal pipe material having a welded portion to expand the metal pipe material; a supply device for supplying the metal pipe material to the forming apparatus; and a control device for controlling an operation of the supply device, in which in a case where a position where a distance from a center of the metal pipe material is the longest, on a surface of the die, when viewed from an extension direction of the metal pipe material in a state where the metal pipe material is disposed between the dies, is a longest position, the control device includes a control unit which controls supply of the metal pipe material to the forming apparatus such that the welded portion is not located on a straight line connecting the longest position and the center of the metal pipe material.

Abstract: A forming device of forming a metal pipe having a pipe portion includes a first die and a second die constituting a first cavity portion configured to form the pipe portion and a second cavity portion configured to form a flange portion, a drive mechanism configured to move at least one of the first die and the second die, and a gas supply unit configured to supply a gas into a metal pipe material which is held between the first die and the second die and is heated, in which each of the first die and the second die has flange forming surfaces which face each other and constitute the second cavity portion, and a protrusion portion, which protrudes from one flange forming surface to the other flange forming surface, is formed on at least one of the flange forming surfaces of the first die and the second die.

Abstract: A forming system forming a metal pipe by expanding a metal pipe material, includes: a main body part having a forming die for forming the metal pipe; an electrode causing a current to flow through the metal pipe material disposed in the forming die such that the metal pipe material is heated; a power supply unit disposed at a position separated from the main body part and supplying power to the electrode; and a power supply line connecting the power supply unit and the electrode, in which the power supply line includes a lower-side passing portion passing through a lower side of a placing surface on which the main body part is placed, a first connection portion drawn to an upper side of the placing surface and connecting the lower-side passing portion and the electrode, and a second connection portion connecting the lower-side passing portion and the power supply unit.

Abstract: A bending meshing type gear device includes an internal gear, an external gear which meshes with the internal gear, a wave generator which bends and deforms the external gear, and a wave generator bearing which is disposed between the wave generator and the external gear, in which the wave generator bearing has a rolling body and an outer ring, and a minimum inner peripheral length of the external gear is larger than a maximum outer peripheral length of the outer ring.

Abstract: A molding apparatus that molds a metal pipe with a flange is disclosed. The molding apparatus includes a first mold and a second mold that are paired with each other, a slide that moves at least one of the first mold and the second mold, a drive unit that generates a driving force for moving the slid, a holding section that holds a metal pipe material between the first mold and the second mold, a gas supply section that supplies gas into the metal pipe material held by the holding section, and a control unit that controls the drive unit, the holding section, and the gas supply section. The first mold and the second mold are provided with a first cavity portion that molds a pipe portion of the metal pipe, and a second cavity portion that molds a flange portion.

Abstract: The controller controls the gas supply of the gas supply unit so as to maintain a pressure in a metal pipe material at a first pressure when a gas is supplied into the metal pipe material which is formed into a pipe portion in a main cavity portion in a state where an upper die and a lower die are joined to each other. It is possible to prevent pressure drop in the pipe portion caused by cooling of the pipe portion due to a contact between the dies, and the pipe portion. Thus, it is possible to suppress a decrease in a force for pressing the pipe portion against the dies. It is possible to suppress a decrease in adhesion between the pipe portion and the dies when the metal pipe is formed, and it is possible to suppress occurrence of variations in hardenability in the pipe portion.

Abstract: By the control of a controller, a gas is supplied into a metal pipe material from a gas supply part so as to expand a part of the metal pipe material in sub-cavity parts, and then a driving mechanism is driven such that expanded parts of the metal pipe material are pressed by an upper die and a lower die to form flange parts. In addition, by the control of the controller, a gas is supplied into the metal pipe material after the formation of the flange parts from the gas supply part so as to form a pipe part in a main cavity part. In this manner, the controller controls the gas supply part and the driving mechanism, and thus flange parts and a pipe part having a desired shape can be easily formed.

Abstract: A forming device that expands a metal pipe material to form a metal pipe includes a die that has an upper die and a lower die, at least one of which is movable, and that form the metal pipe, an electrode that energizes the metal pipe material to heat the metal pipe material, a gas supply part that supplies a gas into the heated metal pipe material to expand the metal pipe material, and a die movement suppressing part that suppresses the movement of the die by an electromagnetic force at least when the energization to the metal pipe material is performed by the electrode.

Abstract: A forming system that forms a metal pipe by expansion in a die includes a heater that heats at least an end part of a metal pipe material, a fluid supply unit that supplies a fluid into the metal pipe material to expand the metal pipe material, and a controller that controls the heater and the fluid supply unit, the fluid supply unit has a nozzle that supplies the fluid from the end part of the metal pipe material into the metal pipe material, and the controller controls the heater so as to heat the end part of the metal pipe material at least before the supply of the fluid by the fluid supply unit, and controls the fluid supply unit so as to expand the end part of the metal pipe material.

Abstract: A forming device includes: a first cavity portion in which a pipe portion is formed and a second cavity portion in which a flange portion is formed, the first cavity portion and the second cavity portion being formed between a first die and a second die; a flange adjusting member which is capable of being advanced into the second cavity portion and is capable of being retreated from the second cavity portion, and which adjusts a length of the flange portion; and a control unit. The control unit sequentially performs a first control of allowing the flange adjusting member to be advanced into the second cavity portion, a second control of allowing the gas supply unit to supply a gas so as to temporarily form the flange portion, and a third control of allowing the flange adjusting member to be retreated from the second cavity portion.

Abstract: A forming device includes a gas supply part supplying a gas into a metal pipe material held and heated between a first die and a second die paired with each other. A driving mechanism moves at least one of the first die and the second die in a direction in which the dies are combined together. A first cavity part is formed between the first die and the second die to form the pipe part. A second cavity part communicates with the first cavity part to form the flange part. A flange forming member can be allowed to advance or retreat in the second cavity part, and forms the flange part. A controller controls the gas supply of the gas supply part, the driving of the driving mechanism, and the advance or retreat of the flange forming member.

Abstract: A dielectric material includes a composite sintered body in which conductive particles are dispersed in an insulating material, in which a dielectric constant at a frequency of 40 Hz is 10 or higher, and a difference between a maximum dielectric loss value and a minimum dielectric loss value at a frequency of 1 MHz in a surface of the composite sintered body is 0.002 or less.

Abstract: A forming device includes: an upper die and a lower die having forming surfaces corresponding to outer surfaces of a pipe with protrusions; a moving mechanism that moves the upper die and the lower die such that a forming space for forming the pipe with protrusions is defined between the forming surfaces of the upper die and the lower die; and a gas supply unit that supplies gas to a forming material which is the base of the pipe with protrusions to expand the forming material. A control unit controls the movement of the upper die and the lower die by the moving mechanism and the supply of gas to the forming material by the gas supply unit such that the forming material is formed into the pipe with protrusions in the forming space.

Abstract: A forming device that forms a metal pipe by heating and expanding a metal pipe material includes: a pair of an upper die and a lower die between which the metal pipe material is heated and expanded; upper electrodes and lower electrodes that sandwich both end parts of the metal pipe material therebetween from upper and lower sides to heat the metal pipe material; and a busbar that is connected only to either the upper electrodes or the lower electrodes to supply electric power from a power supply.

Abstract: A forming device that expands a metal pipe material to form a metal pipe includes: an upper die and a lower die that form a main cavity part forming a main body part of the metal pipe and a sub-cavity part forming a flange part of the metal pipe by surfaces thereof opposed to each other; and a shielding member that prevents foreign matter discharged from the main cavity part or the sub-cavity part from scattering, the sub-cavity part is extended to be opened to the outside of the die in a direction crossing an extending direction of the metal pipe material, and the shielding member is provided on a line in which the sub-cavity part extends in the expanding of the metal pipe material.

Abstract: A forming device that forms a metal pipe by blow forming includes: a gas supply part that supplies a gas to a metal pipe material to expand the metal pipe material; a die attachment part to which a die that is brought into contact with the expanded metal pipe material to form the metal pipe is attached; a gas discharge part that discharges the gas from the metal pipe material; and a pressure detector that detects a pressure of the gas, the gas supply part includes a gas compression part that compresses the gas, and a supply line that transfers the gas compressed by the gas compression part to the metal pipe material, the gas discharge part includes a discharge line that transfers the discharged gas, and the pressure detector is provided in each of the supply line and the discharge line.

Abstract: A molding apparatus for molding a metal pipe includes: a gas supply unit which supplies gas into a heated metal pipe material, thereby expanding the metal pipe material; a mold which molds the metal pipe by bringing the expanded metal pipe material into contact therewith; and a drive unit which generates a driving force for moving the mold, in which a replacement unit is replaceably provided with respect to a main body unit having at least the drive unit, and the replacement unit is configured of at least the gas supply unit and the mold.