摘要:
A press for attaching nuts to pipes has an upper base, a lower base, a movable support having a base end supported at a rear end of the lower base and a front end extending to the front end side of the lower base, a nut receiving recess provided in a piston of a hydraulic cylinder at the front end of the movable support and disposed at the upper end of a lower pattern, a lifter for the movable support, a stopper for the middle position of the movable support, a crimping die as an upper pattern mounted on the upper pattern support and movably disposed vertically on a same axial line as the lower pattern, and a hydraulic cylinder for pressing an upper pattern disposed on the upper base, and pressing the crimping die downward.
摘要:
A stitching method and a wire stitcher having a stitching head for stitching sheet-like materials using annular-eyelet staples, includes a staple support with a supporting body in the stitching head. The staple support supports a region of the annular eyelet during a driving-in operation and is moved out of the annular eyelet only when legs of the staple passing through the sheet-like material, have been largely bent over.
摘要:
A rivet is inserted into a workpiece by an apparatus that includes an internal roller screw linear actuator in which rotational movement of an internally threaded cylinder is converted into linear movement of a fastener insertion actuator assembly. The cylinder is driven in rotation by a servo-controlled motor. The angular velocity of the cylinder required to deliver the required energy to effect fastener insertion is calculated and the motor is first controlled to accelerate the cylinder up to the calculated angular velocity, the actuator assembly simultaneously being moved by the cylinder towards the workpiece. The motor is then controlled to maintain the angular velocity of the cylinder at not less than the calculated magnitude at least until insertion of the fastener. The cylinder stores kinetic energy by virtue of its inertia. Using this inertia to insert fasteners eliminates the need for position or force feedback control. The process allows for a rapid cycle time and the apparatus is compact.
摘要:
A system useful for riveting sheets of metal together. The system having a fastening element having a head on one side and a self-piercing surface on an opposite end, a die having an elastically moveable annular stop and a ring boost, and a ram assembly operably punching the piercing surface into a sheet. The fastening element may be a self-piercing rivet.
摘要:
A press for attaching nuts to pipes has a lower holder (6) fitting in and holding a pipe (60). A basal portion of this holder supported on the rear part of a lower base (2) moves up and down, and its forward portion extends to the front part of a lower base. Lifters (30) bear against and support the forward portion so as to keep it lifted a slight distance. Stoppers (31) bear against and support an intermediate region of the holder to be lifted a slight distance, and also bear against an end of the pipe (60) and retaining it at a prescribed position. A nut feed passage (10) extends in an outer surface of the lower holder from its basal to forward portion, and a nut pusher (14) is disposed in the forward portion. A cam rod (21) inserted in the lower holder (6) has a frontal oblique cam surface (22) for driving the pusher (14) to a nut releasing position (12), and a cam actuating means (25) is for the rod. An upper holder (3) moves in a direction perpendicular to the lower holder (6), a caulking die (47) is carried by the upper holder (3), and a die driving means (50) is for the caulking die, such that the press is rendered easy to automate.
摘要:
A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.
摘要:
Disclosed is an apparatus for separating culls coupled to a lead frame when a semiconductor chip is molded. The apparatus includes a lower plate, on which culls coupled to a lead frame are placed, an upper plate pressing culls placed on the lower plate in order to separate culls from the lead frame, a pilot pin installed in the upper plate by passing through the upper plate in order to press culls together with the upper plate when the upper plate presses the culls, and a sensor unit installed adjacent to the movement path of the pilot pin so as to detect a movement of the pilot pin. When culls are separated, faults of articles caused by a molding material insufficiently filled in a mold are checked through detecting a movement of the pilot pin.
摘要:
A riveting system is operable to join two or more workplaces with a rivet. In another aspect of the present invention, a self-piercing rivet is employed. Still another aspect of the present invention employs an electronic control unit and one or more sensors to determine a riveting characteristic and/or an actuator characteristic.
摘要:
A broken trim die tool detection sensor. The lands of the tie bar die connect with the leads of the unit to form switches. The states of these switches indicate broken die lands or other malfunctions.
摘要:
A rivet is inserted into a workpiece by apparatus that includes an internal roller screw linear actuator in which rotational movement of an internally threaded cylinder is converted into linear movement of a fastener insertion actuator assembly. The cylinder is driven in rotation by a servo-controlled motor. The angular velocity of the cylinder required to deliver the required energy to effect fastener insertion is calculated and the motor is first controlled to accelerate the cylinder up to the calculated angular velocity, the actuator assembly simultaneously being moved by the cylinder towards the workpiece. The motor is then controlled to maintain the angular velocity of the cylinder at not less than the calculated magnitude at least until insertion of the fastener. The cylinder stores kinetic energy by virtue of its inertia. Using this inertia to insert fasteners eliminates the need for position or force feedback control. The process allows for a rapid cycle time and the apparatus is compact.