The present invention provides a method and a device for manufacturing a safety vent of a cap plate for a secondary battery, a method for manufacturing a cap plate using the method for manufacturing a safety vent, and a cap plate for a secondary battery manufactured by the method for manufacturing a cap plate, which can prevent a molding defect in a safety vent of the strength of a vent plate becoming excessively great, by easily molding the safety vent with only one or two times of forging processing in order to prevent a phenomenon in which hardening by forging occurs, during forging, in the vent plate formed at the lower part of the safety vent.

To provide a rotating member and a forming method thereof that allow formation of protrusions biting into an opposite surface to achieve high slip torque with a simple configuration. The rotating member includes a boss part and an anti-slip surface at least on one of both axial end faces of the boss part. The anti-slip surface has a plurality of corrugated rib parts, which includes a main groove and at least one auxiliary groove extending parallel to the main groove, with a ridge protruding higher than the anti-slip surface between the main groove and the auxiliary groove.

A secondary battery includes an electrode assembly in which first and second electrodes and a separator provided between the first and second electrodes are wound, the first and second electrodes each including a non-coated portion disposed at a long side end thereof, exposed to an outside of the separator, and having no active material applied thereto; and a current collecting plate provided at one end of the electrode assembly at which the non-coated portion of the first electrode is exposed, the current collecting plate including a central portion corresponding to a core of the electrode assembly, in which the central portion includes a first welding portion having a thickness smaller than a thickness of a remaining portion of the current collecting plate. A battery pack having a plurality of the secondary batteries and a vehicle having the battery pack are also provided.

A method of manufacturing a handcuff includes bending a first bar of alloy into a curve roughly matching a shape of a desired cheek plate half, heating the first bar to a forging temperature, die forging the first bar into a first cheek frame forging having a first lockset cavity portion, and trimming the first forging to a form a first forged cheek from half having a first cheek arm. This is repeated with a second bar to obtain a second forged cheek frame half having a second cheek arm. The first cheek frame half is joined directly to the second cheek frame half, the first lockset cavity portion and the second lockset cavity portion combining to form a lockset cavity. A bow is pivotally attached between the first and second cheek arms and a lockset is installed in the lockset cavity.

A method of manufacturing a handcuff includes bending a first bar of alloy into a curve roughly matching a shape of a desired cheek plate half, heating the first bar to a forging temperature, die forging the first bar into a first cheek frame forging having a first lockset cavity portion, and trimming the first forging to a form a first forged cheek from half having a first cheek arm. This is repeated with a second bar to obtain a second forged cheek frame half having a second cheek arm. The first cheek frame half is joined directly to the second cheek frame half, the first lockset cavity portion and the second lockset cavity portion combining to form a lockset cavity. A bow is pivotally attached between the first and second cheek arms and a lockset is installed in the lockset cavity.

The present invention relates to a method of manufacturing a drum of an axial piston machine by machining a cylindrical round metal, with the machining comprising a forging and with at least one structural element of the drum being produced or prefabricated by the forging.

The present invention relates to a method of manufacturing a drum of an axial piston machine by machining a cylindrical round metal, with the machining comprising a forging and with at least one structural element of the drum being produced or prefabricated by the forging.

Solid metal protrusions are formed by a method including: clamping and fixing the metal workpiece with a support die and a pressure die; pressing each cross section of an outer peripheral end parts of the metal workpiece fixed with the support die and the pressure die at a temperature lower than a softening point of a metal used as the metal workpiece from a direction perpendicular or oblique to an upright direction of the protrusions to be formed on one surface of the metal workpiece by press molding using a pressing die or a pressing jig; undergoing plastic flows of metal into through-holes formed as recessed parts that serve as female molds for forming the protrusions in at least one of the support die and the pressure die; and forming solid protrusions on the surface of the metal workpiece.

A method and apparatus for enabling handgun magazines to function in a rifle lower forging, may include a rifle lower forging. The rifle lower forging may include but is not limited to a recessed area on a side portion of the rifle lower forging configured to receive a handgun magazine release. The rifle lower forging may further include a vertical hole on a top portion of the rifle lower forging configured to receive an elongated portion to hold the handgun magazine release. The rifle lower forging may further include a hole perpendicular to the vertical hole configured to receive a handgun magazine release spring. The rifle lower forging may further include a horizontal slit on the top portion of the rifle lower forging configured to receive an ejector. The rifle lower forging may further include one or more apertures perpendicular to the horizontal slit each configured to receive a fastener to secure the ejector to the rifle lower forging. The rifle lower forging may further include a hollow portion proximate the horizontal slit configured to receive a handgun magazine.

A method and apparatus for enabling handgun magazines to function in a rifle lower forging, may include a rifle lower forging. The rifle lower forging may include but is not limited to a recessed area on a side portion of the rifle lower forging configured to receive a handgun magazine release. The rifle lower forging may further include a vertical hole on a top portion of the rifle lower forging configured to receive an elongated portion to hold the handgun magazine release. The rifle lower forging may further include a hole perpendicular to the vertical hole configured to receive a handgun magazine release spring. The rifle lower forging may further include a horizontal slit on the top portion of the rifle lower forging configured to receive an ejector. The rifle lower forging may further include one or more apertures perpendicular to the horizontal slit each configured to receive a fastener to secure the ejector to the rifle lower forging. The rifle lower forging may further include a hollow portion proximate the horizontal slit configured to receive a handgun magazine.