Abstract: A sliding member integrated with a guide pin is inserted into a guide hole of an electrode main body. An elastic ring is integrated with the guide pin under a state in which the guide pin passes through the elastic ring. A portion of the sliding member has a pressurizing end surface configured to press the elastic ring against an inner end surface of the guide hole. When the pressurizing end surface presses the elastic ring against the inner end surface, flow of the cooling air is interrupted. When the elastic ring is away from the inner end surface, the cooling air is allowed to flow.

Abstract: Provided is apart stopping/passing unit for apart including a unit main body having a part passage, an opening/closing member configured to open and close the part passage, and an attracting mechanism. The opening/closing member includes a stopper surface for stopping a part and a passing hole for allowing the part to pass therethrough. The attracting mechanism is configured to position the part by an attracting force when the stopper surface takes a part stopping position, and to allow the part to pass by elimination of an attraction force when the passing hole takes a part passing position.

Abstract: A method capable of constructing an accurate three-dimensional image is offered. The method comprises the step (S10) of obtaining a first series of tilted images which are constituted by electron microscope images or elemental mapping images of a sample (S) at different tilt angles and which have been obtained by tilting the sample in angular increments, the step (S14) of obtaining a second series of tilted images which are constituted by electron microscope images or elemental mapping images of the sample at different tilt angles and which have been obtained by rotating the sample about an axis (P) perpendicular to a surface (Sf) of the sample and then tilting the sample in angular increments, and the step (S16) of constructing the three-dimensional image on the basis of the first and second series of tilted images.

Abstract: A sliding member integrated with a guide pin is inserted into a guide hole of an electrode main body. An elastic ring is integrated with the guide pin under a state in which the guide pin passes through the elastic ring. A portion of the sliding member has a pressurizing end surface configured to press the elastic ring against an inner end surface of the guide hole. When the pressurizing end surface presses the elastic ring against the inner end surface, flow of the cooling air is interrupted. When the elastic ring is away from the inner end surface, the cooling air is allowed to flow.

Abstract: Provided is an electric resistance welding electrode, which comprises an insulated cylinder, an electrode slidably inserted into the insulated cylinder, an urging member configured to apply an advance force to the insulated cylinder, and a stopper configured to set an advance distance of an insulated end surface of the insulated cylinder with respect to an pressing surface of the electrode to a predetermined distance. A receiving recessed portion for receiving a component is defined by the pressing surface retreated by the predetermined distance with respect to the insulated end surface and an inner surface of the insulated cylinder. The electric resistance welding electrode performs welding in one of welding modes consisting of a component welding mode and a spot welding mode.

Abstract: A lower portion is formed in a vicinity of an end portion of a bottom member of a storage container. A lift member configured to lift parts kept on standby on the lower portion is arranged in a state of being movable up and down along an inner wall of the storage container. A transport unit configured to transport the part, which is lifted and transferred thereto by the lift member, to a target position is arranged, and a position at which the parts are to be transferred to the transport unit is set in a vicinity of an upper position of the lift member.

Abstract: A device is provided in which a pressing electrode (19, 105) is advanced toward a steel plate component (48, 131) to press a welding projection (4) of a shaft-shaped component (1) against the steel plate component (48, 131), so that the shaft-shaped component (1) is electric-resistance-welded to the steel plate component (48, 131). Pressing force accumulating means (22, 128) for accumulating the pressing force of the pressing electrode (19, 105) is disposed between a pressing member (17, 106) and a pressed member (18, 121). Detection means (54, 113, 3) activated when the pressing member (17, 106) is located at a predetermined position is provided to apply welding current flowing to the electrode, and pressing force adjusting means (55, 123) for adjusting the activation position of the detection means (54, 113, 3) is provided.

Abstract: A method capable of constructing an accurate three-dimensional image is offered. The method comprises the step (S10) of obtaining a first series of tilted images which are constituted by electron microscope images or elemental mapping images of a sample (S) at different tilt angles and which have been obtained by tilting the sample in angular increments, the step (S14) of obtaining a second series of tilted images which are constituted by electron microscope images or elemental mapping images of the sample at different tilt angles and which have been obtained by rotating the sample about an axis (P) perpendicular to a surface (Sf) of the sample and then tilting the sample in angular increments, and the step (S16) of constructing the three-dimensional image on the basis of the first and second series of tilted images.

Abstract: Provided is a component detection device, which is installable on component processing means which performs a predetermined operation to a conductive component interposed between one conductive member and another conductive member, the component detection device comprising a detection circuit (41) for distinguishing between the conductive component and a conductive foreign matter interposed between the one conductive member and the another conductive member, the detection circuit (41) being electrically connected between the one conductive member and the another conductive member, wherein the detection circuit (41) comprises: a reference voltage generating circuit section (43) for generating a reference voltage based on an input voltage; a voltage comparing circuit section (44) for comparing between the reference voltage and a detection voltage input from a detection terminal; and a sensitivity adjusting circuit section (45) for adjusting the detection voltage so that, when the conductive component is interpo

Abstract: Provided are a bolt for projection welding and a method of welding the same in which a portion of large fusion depth is formed in a small region and in which junction to a steel sheet part is secured in other regions, thereby realizing high weld strength and stable junction state. A bolt includes a shaft part, an enlarged diameter part, and a fusion bonding projection, the fusion bonding projection including an initial fusion part having at an end surface thereof a tapered portion and a main fusion part continuous with the initial fusion part.

Abstract: An apparatus for welding a projection bolt includes a control unit which outputs an actuating signal for an advancing pressurizing means in response to at least a signal indicating completion of insertion of the projection bolt into a receiving hole and a signal indicating completion of movement of a steel plate part. Electrodes are provided for welding the projection bolt, and advancement of the electrodes from a retracted state is started in response to the actuating signal.

Abstract: A parts feeding apparatus feeds projection bolts into a receiving hole in an electrode and includes an excessively long parts detecting device which detects projection bolts having excessively long shanks. The excessively long parts detecting device has a pass control member fixed between a pair of plates of the delivery section for engaging an excessively long shank and a control plate which prevents the projection bolt having the excessively long shank from projecting upward so as to lock the projection bolt in cooperation with the pass control member. A feed rod advances to a predetermined position at which the shanks of the projection bolts are inserted into the receiving hole, and a spacing between the holding head and a receiving hole when the feed rod is in the predetermined position is set to prevent projection bolts having an excessively short shank from reaching the receiving hole.

Abstract: Provided is a component detection device, which is installable on component processing means which performs a predetermined operation to a conductive component interposed between one conductive member and another conductive member, the component detection device comprising a detection circuit (41) for distinguishing between the conductive component and a conductive foreign matter interposed between the one conductive member and the another conductive member, the detection circuit (41) being electrically connected between the one conductive member and the another conductive member, wherein the detection circuit (41) comprises: a reference voltage generating circuit section (43) for generating a reference voltage based on an input voltage; a voltage comparing circuit section (44) for comparing between the reference voltage and a detection voltage input from a detection terminal; and a sensitivity adjusting circuit section (45) for adjusting the detection voltage so that, when the conductive component is interpo

Abstract: A device is provided in which a pressing electrode (19, 105) is advanced toward a steel plate component (48, 131) to press a welding projection (4) of a shaft-shaped component (1) against the steel plate component (48, 131), so that the shaft-shaped component (1) is electric-resistance-welded to the steel plate component (48, 131). Pressing force accumulating means (22, 128) for accumulating the pressing force of the pressing electrode (19, 105) is disposed between a pressing member (17, 106) and a pressed member (18, 121). Detection means (54, 113, 3) activated when the pressing member (17, 106) is located at a predetermined position is provided to apply welding current flowing to the electrode, and pressing force adjusting means (55, 123) for adjusting the activation position of the detection means (54, 113, 3) is provided.

Abstract: A shaft-like parts feeding apparatus is disclosed, which includes a parts feeder (6) for delivering shaft-like parts (1), and a feed path extending from the parts feeder (6) to a point short of a feed rod (21), wherein a shaft-like part held by a holding head (1) of the feed rod (20) is inserted into a receiving hole (35) in an electrode (22). An excessively long parts detecting means which detects and removes excessively long parts (1A) longer than normal length is disposed in the parts feeder (6) or in the feed path, and the spacing between the receiving hole (35) and the holding head (20) with the feed rod (20) having stopped at a predetermined position after advancing, is set to an excessively short parts expelling spacing (L) which prevents excessively short parts (1C) shorter than normal length from reaching the receiving hole (35). Shaft-like parts of abnormal length are removed in the feed path extending from the parts feeder to the electrode by a system having a cooperative feature, i.e.

Abstract: To drive an oscillator always at a stable and constant oscillation even if frequency and amplitude of a power supply voltage differ depending on a delivery destination of the oscillator, an oscillator drive control device (10), which generates a predetermined switching pattern by operating a switching element, and supplies an oscillation generation unit (7) of the oscillator with drive electric power for generating predetermined oscillation frequency and amplitude according to the switching pattern, includes: a voltage detection circuit (11) for detecting a power supply voltage unique to a delivery destination of the oscillator; a memory circuit (12) storing, in advance, a basic switching pattern adapted to an arbitrarily set reference voltage, and used for driving the oscillation generation unit (7) at proper oscillation frequency and amplitude; and an arithmetic processing circuit (13) for calculating a ratio of the detected voltage unique to the delivery destination detected by the voltage detection circui

Abstract: To drive an oscillator always at a stable and constant oscillation even if frequency and amplitude of a power supply voltage differ depending on a delivery destination of the oscillator, an oscillator drive control device (10), which generates a predetermined switching pattern by operating a switching element, and supplies an oscillation generation unit (7) of the oscillator with drive electric power for generating predetermined oscillation frequency and amplitude according to the switching pattern, includes: a voltage detection circuit (11) for detecting a power supply voltage unique to a delivery destination of the oscillator; a memory circuit (12) storing, in advance, a basic switching pattern adapted to an arbitrarily set reference voltage, and used for driving the oscillation generation unit (7) at proper oscillation frequency and amplitude; and an arithmetic processing circuit (13) for calculating a ratio of the detected voltage unique to the delivery destination detected by the voltage detection circui

Abstract: Provided are a welding method and a welding apparatus capable of appropriately starting the advancement of an electrode based on the positioning of a welding point on a steel plate part to which a projection bolt is to be welded and on the state of completion of feeding of the projection bolt to the electrode. A bolt (10) held by a feed rod (17) is inserted into a receiving hole (20) of an electrode (6), and an air blast is applied from a holding head (18) to complete the insertion of the bolt into the receiving hole (20). Then, the feed rod (17) is retracted. Subsequently, the electrode (6) is advanced to weld the bolt to a steel plate part (30) by electric resistance welding. In this case, the electrode (6) is advanced toward the steel plate part (30) in response to a signal generated upon insertion of the bolt and a signal generated after a welding point on the steel plate part (30) is adjusted. Subsequently, pressurization and energization are carried out.

Abstract: Provided are an operation controller of an electrode and a control method therefor in electric resistance welding, which are capable of automatically inhibiting advancement of the electrode when an operating time period of a supply rod becomes abnormally longer. A part (1, 39) is supplied to the electrode by a supply rod (10), a steel plate part (4) is subjected to electric resistance welding, and there are provided a sensor means (27) which transmits an electrode advancing operation signal during restoring operation or at a time of completion of the restoring operation of the supply rod (10), a timer means (30) for judging whether the electrode advancing operation signal is transmitted at a timing within a predetermined time period or after elapse of the predetermined time period.

Abstract: Provided are a bolt for projection welding and a method of welding the same in which a portion of large fusion depth is formed in a small region and in which junction to a steel sheet part is secured in other regions, thereby realizing high weld strength and stable junction state. A bolt includes a shaft part, an enlarged diameter part, and a fusion bonding projection, the fusion bonding projection including an initial fusion part having at an end surface thereof a tapered portion and a main fusion part continuous with the initial fusion part.