摘要:
The system includes means for moving a rivet or a collar from a storage bin to an initial position for the respective gripping assemblies. The presence of the rivet and/or collar is recognized as it moves through a feeding mechanism. After the rivet or collar is gripped, they are moved either into an opening in the workpiece, in the case of a rivet, or onto the tail of a lockbolt, in the case of a collar. The gripping assembly is then released from the rivet or the collar, with the gripping means moving back to an initial position. Further operations can then be carried out on the rivet or collar.
摘要:
The power supply, useful with an electromagnetic force apparatus such as a riveter or a bolt inserter, includes two capacitor banks which are charged through charging doubler modules. Each charging doubler module includes an AC capacitor which is responsive to a power source. The AC capacitor is connected to a node point between two diode elements, which are connected in series across the capacitor bank. An analog-to-digital converter converts the voltage on the capacitor bank to a digital voltage for comparison with a selected digital charge voltage in a controller. The selected digital charge voltage may vary over time by means of a compensating algorithm. A ground fault indicator using a biasing voltage is connected between a selected electrical circuit portion of the force apparatus and earth ground. A gas discharge tube in combination with a current sensing element is connected to the capacitor banks to determine a possible over-voltage condition. A Hall-effect sensor is mounted between bus connections which carry the current between the capacitor bank and a coil portion of the electromagnetic force apparatus to determine the current flowing into the coil by measurement of the magnetic field between the bus bars.
摘要:
The apparatus includes a riveting assembly (10) which includes a rivet die (18) having a concave configuration which is brought into contact with one end of a rivet to be upset. The die (18) is driven into a rivet end by a rivet ram (16) a first time, resulting in an interference fit between the rivet shank and the part being riveted. When the die (18) is withdrawn, the newly formed rivet head will in some instances expand outwardly away from the surface of the part, leaving a gap between the formed end of the rivet and the part. A second strike assembly includes an L-shaped second strike element (28) which is moved between the die (18) and the rivet head. The ram (16) is then driven a second time, forcing the second strike element (28) against the formed end of the rivet, forcing the formed end of the rivet to flow outwardly and toward the part, resulting in the filling of the gap between the rivet head and the surface of the part.
摘要:
A two axis tracer (10) includes a back plate (34) and a front plate assembly (49) which includes a single sensing member (24) at the top end of which is a mushroom-shaped cap portion (28). Mounted on back plate (34) is a slider assembly (38) which moves in one direction between the front and rear edges of the back plate (34). The front plate assembly (49) is mounted to the slider assembly (38). A first air cylinder (60) operating a lever arm (52) provides movement of the sensing member (24) in the other direction, which is perpendicular to the one direction. A second air cylinder (68) includes an extendable rod, the end of which is secured to the back plate (34), providing movement of the front plate assembly (49) by action of the slider assembly (38). The top and peripheral edge of the cap portion (28) contact surfaces of the part to be worked in the two directions.
摘要:
A modular, electromagnetic de-icing system, useful for aircraft, each module being self-contained and including an actuator coil which has a surface configuration which is substantially the same as the shape of the aircraft surface to be de-iced. Each module further includes an electrolytic capacitor which, when discharged, produces a current pulse through the actuator coil, as well as a power supply connected directly to the aircraft-voltage supply for charging the electrolytic capacitor to a selected level, and an electronic switch for selectively connecting the capacitor to the coil when the voltage on the capacitor reaches a selected level. The current through the coil results in a magnetic force pulse which acts on the metal skin of the aircraft to debond and shatter the ice therefrom.
摘要:
The yoke assembly is C-shaped, comprising two downwardly depending leg portions and an intermediate portion. Each leg of the yoke is supported for movement of the yoke in an X coordinate direction and a Y coordinate direction. The yoke is further supported about two spaced two-axis pivot point assemblies such that the yoke can move rotationally about the Y axis and about the X axis. The pivot points and the tool point for the tools on the yoke used to accomplish the assembly operations remain in registry during movement of the yoke member.
摘要:
A rivet feed system which includes a base feeder assembly (28), having a rivet passageway (30) extending lengthwise therethrough. The base feeder assembly (28) includes cutout regions to receive rivet injectors (24) which are moved in operation between a first position and a second position. In the first position, an opening (80) in the injectors (24) forms a part of the passageway (30) through the base feeder assembly (28), while in the second position, the opening (80) is positioned directly beneath a vertically oriented rivet cartridge (22) to receive a rivet therefrom. The passageway (30) is connected to a source of pressurized air (32) which moves rivets therealong to a rivet machine or the like. The plurality of cartridges (22) positioned along the base feeder assembly contain rivets of various selected sizes. The rivet cartridges (22) are filled off line by means of a vibrating bowl feeder (117) and a rivet insertion assembly which includes a rivet pump (120) which automatically and repetitively moves rivets which have been inserted thereinto from the bowl feeder (117) into the rivet cartridge (22).
摘要:
The power supply, useful with an electromagnetic force apparatus such as a riveter or a bolt inserter, includes two capacitor banks which are charged through charging doubler modules. Each charging doubler module includes an AC capacitor which is responsive to a power source. The AC capacitor is connected to a node point between two diode elements, which are connected in series across the capacitor bank. An analog-to-digital converter converts the voltage on the capacitor bank to a digital voltage for comparison with a selected digital charge voltage in a controller. The selected digital charge voltage may vary over time by means of a compensating algorithm. A ground fault indicator using a biasing voltage is connected between a selected electrical circuit portion of the force apparatus and earth ground. A gas discharge tube in combination with a current sensing element is connected to the capacitor banks to determine a possible overvoltage condition. A Hall-effect sensor is mounted between bus connections which carry the current between the capacitor bank and a coil portion of the electromagnetic force apparatus to determine the current flowing into the coil by measurement of the magnetic field between the bus bars.
摘要:
A rivet feed system which includes a base feeder assembly (28), having a rivet passageway (30) extending lengthwise therethrough. The base feeder assembly (28) includes cutout regions to receive rivet injectors (24) which are moved in operation between a first position and a second position. In the first position, an opening (80) in the injectors (24) forms a part of the passageway (30) through the base feeder assembly (28), while in the second position, the opening (80) is positioned directly beneath a vertically oriented rivet cartridge (22) to receive a rivet therefrom. The passageway (30) is connected to a source of pressurized air (32) which moves rivets therealong to a rivet machine or the like. The plurality of cartridges (22) positioned along the base feeder assembly contain rivets of various selected sizes. The rivet cartridges (22) are filled off line by means of a vibrating bowl feeder (117) and a rivet insertion assembly which includes a rivet pump (120) which automatically and repetitively moves rivets which have been inserted thereinto from the bowl feeder (117) into the rivet cartridge (22).
摘要:
The deicing system includes a plurality of relatively thin, flat coils positioned between an aircraft surface and an outer sheet. If the aircraft surface is electrically conducting such as aluminum, such that eddy currents may be established therein, then the outer sheet is resistant to eddy currents being established therein. An electrically conducting layer may be positioned between the coil and the aircraft surface to improve efficiency. If the aircraft surface is resistant to eddy currents being established therein, then outer sheet is electrically conducting. However, if an electrically conducting layer is positioned between coil and outer sheet, the outer sheet may be made from non-conducting material. A rapidly rising current through the coil will result in a rapid repulsion between the coil and the particular member which is electrically conducting, causing ice to be removed (shattered) from the outer sheet.