Abstract: Disclosed is a friction welding apparatus in which electricity is supplied to a servo motor to rotate a spindle to thereby impart a fixed relative rotational motion to one workpiece and another workpiece, and, while doing so, the one workpiece and the other workpiece are brought into contact with each other and imparted a frictional thrust thereto to soften a bonding interface between the two workpieces. After this, the friction welding apparatus undergoes speed reduction until the RPM of the spindle becomes a phase adjustment RPM; when the RPM of the spindle attains the phase adjustment RPM, a clutch device is engaged with the spindle, and the electricity supply to the servo motor is cut off to stop the rotation of the spindle.

Abstract: A friction welding method includes a step of friction welding a first workpiece and a second workpiece together by pressing the first workpiece against the second workpiece relatively while rotating the two workpieces relatively, and a step of annealing the friction welded workpiece at a position adjacent to a welded portion thereof with high frequency induction heating. A friction welding apparatus is provided for friction welding a first workpiece and a second workpiece together by pressing the first workpiece against the second workpiece relatively while rotating the two workpieces relatively. The friction welding apparatus includes a high frequency induction heater for annealing the friction welded workpiece at a position adjacent to a welded portion thereof with high frequency induction heating.

Abstract: A friction welding apparatus includes a first holder for holding a first work piece, a second holder for holding a second work piece, a thrust mechanism and a shaft. The thrust mechanism moves the second holder toward or away from the first holder. The shaft is connected to the first holder and the second holder for receiving thrust caused by the thrust mechanism. The shaft has a tie rod and an externally threaded member which is coaxially connected to the tie rod so that the externally threaded member is rotatable on an axis thereof. The thrust mechanism has the externally threaded member, an internally threaded member and a thrust motor. The internally threaded member is provided in either one of the first holder and the second holder and engaged with the externally threaded member. The thrust motor rotates the externally threaded member relative to the internally threaded member.

Abstract: A friction welding device allows one work (5) and the other work (9) to be in contact with each other and gives friction thrust thereto, giving a fixed relative rotation operation to the one work (5) and the other work (9) by energizing a servo motor (15) and rotating a main shaft (3), and thereby softens a connection interface between the works (5, 9). Then, the friction welding device decelerates the main shaft (3) until the number of the rotation of the main shaft (3) is set to the number of phase focusing rotation, and when the number of the rotation of the main shaft reaches the number of the phase focusing rotation, allows a clutch device (19) to be engaged with the main shaft, shuts off the energization to the servo motor (15), and thereby stops the rotation of the main shaft (3).

Abstract: A friction welding method includes a step of friction welding a first workpiece and a second workpiece together by pressing the first workpiece against the second workpiece relatively while rotating the two workpieces relatively, and a step of annealing the friction welded workpiece at a position adjacent to a welded portion thereof with high frequency induction heating.

Abstract: One aspect of the present invention can include a friction welding method having a friction step for generating a friction heat by pressing the pair of works while relatively rotating the pair of works, and an upset step started before generating an approach margin at the pair of works at the friction step, restricting rotation of the pair of works relative to each other and applying an upset pressure between the pair of works.

Abstract: A friction welding apparatus includes a first holder for holding a first work piece, a second holder for holding a second work piece, a thrust mechanism and a shaft. The thrust mechanism moves the second holder toward or away from the first holder. The shaft is connected to the first holder and the second holder for receiving thrust caused by the thrust mechanism. The shaft has a tie rod and an externally threaded member which is coaxially connected to the tie rod so that the externally threaded member is rotatable on an axis thereof. The thrust mechanism has the externally threaded member, an internally threaded member and a thrust motor. The internally threaded member is provided in either one of the first holder and the second holder and engaged with the externally threaded member. The thrust motor rotates the externally threaded member relative to the internally threaded member.

Abstract: A die-clamping system has a die and a clamping device. The die includes a first engaging portion in a first predetermined shape. The die is transferred in a first direction from a first position toward a second position. The clamping device has a second engaging portion in a second predetermined shape that is complementary to the first predetermined shape. The second engaging portion of the clamping device at the second position completes engagement with the first engaging portion by the time when the die arrives at the second position in the first direction.

Abstract: Die opening apparatus (50) of a die-casting system (10) is operable to open a die (D1, D2). A first cylinder (51) may perform an initial die opening operation and a second cylinder (55) may perform a subsequent die opening operation. The thrust generated by the first cylinder is preferably directly transmitted to the die in a die opening direction, optionally via a push pin (52).

Abstract: A die-casting system includes a core withdrawing device (50). The core withdrawing device is configured independently of a die (D1, D2) and is operable to withdraw a core (d) from the die.

Abstract: A discharge system (100) may discharge gases produced by a die-casting machine. The die-cast machine may include a first die (150) and a second die (170) that are configured in order to form cast products. A closure device defines an enclosed region (190) between opposing surfaces (151, 171) of the first and second dies. A transfer device (110, 120, 122, 130) serves to discharge the gases within the enclosed region to the outside. The first and second dies are configured to form a portion of the closure device.

Abstract: A die-clamping system has a die and a clamping means. The die includes a first engaging portion in a first predetermined shape. The die is transferred in a first direction from a first position toward a second position. The clamping means has a second engaging portion in a second predetermined shape that is complementary to the first predetermined shape. The second engaging portion of the clamping means at the second position completes engagement with the first engaging portion by the time when the die arrives at the second position in the first direction.

Abstract: A die-casting system includes a core withdrawing device (50). The core withdrawing device is configured independently of a die (D1, D2) and is operable to withdraw a core (d) from the die.

Abstract: Die opening apparatus (50) of a die-casting system (10) is operable to open a die (D1, D2). A first cylinder (51) may perform an initial die opening operation and a second cylinder (55) may perform a subsequent die opening operation. The thrust generated by the first cylinder is preferably directly transmitted to the die in a die opening direction, optionally via a push pin (52).

Abstract: A discharge system (100) may discharge gases produced by a die-casting machine. The die-cast machine may include a first die (150) and a second die (170) that are configured in order to form cast products. A closure device defines an enclosed region (190) between opposing surfaces (151, 171) of the first and second dies. A transfer device (110, 120, 122, 130) serves to discharge the gases within the enclosed region to the outside. The first and second dies are configured to form a portion of the closure device.

Abstract: A deflashing apparatus is incorporated into a friction welding machine which includes a rotary chuck for chucking a first workpiece, and a carriage having a fixed chuck for chucking a second workpiece and being capable of advancing and retracting in an axial direction. The deflashing apparatus includes a pair of cutter arms, an assistant member, and a bumper fitting. The cutter arms are disposed on the carriage, can swivel, and include a press-cutter joined at the leading end. The press-cutter is dividable into two members, and can envelop the first workpiece. The assistant member is disposed on the carriage, and holds a stopper. The stopper contacts with an end of the second workpiece. The bumper fitting is brought into contact with the assistant member to inhibit the assistant member from retracting. After the first and second workpieces are joined, the rotary chuck releases the first workpiece, and the carriage retracts.