There is provided a method of manufacturing a metal shell formed body by cold forging for a metal shell of a spark plug. In the manufacturing method, a semi-finished formed body is first provided with a second inner step without the formation of an annular front end portion. After the semi-finished formed body is inserted from its front end side into a die, a punch is pushed into the semi-finished formed body from its rear end side. By pushing the punch, an annular front-facing surface of the punch is pushed onto the second inner step so as to press a front end portion of the formed body against an annular front end portion forming part of the die. By such a forming step, the metal shell formed body is obtained in which the annular front end portion is formed by extrusion.

This invention relates to a solenoid housing and to a method for providing a solenoid housing having the base, wall, center pole, and flange integrally connected as a single piece. The instant invention provides for mounting protrusions and window for electrical leads as an integral part of the housing and manufacturing process.

This invention relates to a solenoid housing and to a method for providing a solenoid housing having the base, wall, center pole, and flange integrally connected as a single piece. The instant invention provides for mounting protrusions and window for electrical leads as an integral part of the housing and manufacturing process.

A secondary battery case manufacturing method of the present disclosure includes preparing a material, forming an impact formed product by performing impact forging on the material with a die and a punch, and obtaining a complete product by applying ironing on the impact formed product.

A secondary battery case manufacturing method of the present disclosure includes preparing a material, forming an impact formed product by performing impact forging on the material with a die and a punch, and obtaining a complete product by applying ironing on the impact formed product.

A method of joining a component, such as a cutting element, to another component or body of an earth-boring tool, according to embodiments of the present disclosure, includes disposing a third-body structure, which may comprise a braze material, between a surface of the component and a surface of the another component of the earth-boring tool. The component to be joined is then rotated relative to the surface of the another component to generate frictional heat in the third-body structure and to at least plasticize material of the third-body structure. After the rotation, the plasticized material of the third-body structure is compressed between the surfaces and then allowed to solidify, which bonds the component to the another component without deforming either the component or the another component.

A method of reducing the cycle time required for flow-drill screw operations by providing a dimple on a part that is engaged by a flow-drill screw. A tip of the flow-drill screw engages a contact band at a location spaced from the tip of the distal end of the flow-drill screw and base portion of the dimple. Friction between the flow-drill screw tip and dimple creates a heat concentration area and results in displaced material forming a threaded sleeve. The flow-drill screw is secured by the threads of the threaded sleeve to secure the top part to the bottom part.

In a method for producing in particular structural components or chassis components for a motor vehicle by hot or semi-hot forming, a sheet metal blank is heated in a heating station at least in a first region from a starting temperature to a target temperature, and then the warm blank is transferred to a cooled pressing tool and is formed and press-hardened. The heating station includes at least one burner zone which includes at least one burner, in which zone the sheet metal blank is heated from the starting temperature to the target temperature, and at least one burner is operated with a combustion gas and an oxygen-containing gas and the sheet metal blank comes into direct contact with the burner flame.

In a method for producing in particular structural components or chassis components for a motor vehicle by hot or semi-hot forming, a sheet metal blank is heated in a heating station at least in a first region from a starting temperature to a target temperature, and then the warm blank is transferred to a cooled pressing tool and is formed and press-hardened. The heating station includes at least one burner zone which includes at least one burner, in which zone the sheet metal blank is heated from the starting temperature to the target temperature, and at least one burner is operated with a combustion gas and an oxygen-containing gas and the sheet metal blank comes into direct contact with the burner flame.

A forge bonding machine includes: a supporting body supporting a lower-surface side of bonding portion of members to be bonded in a state where the members are layered; a pressurizing body applying pressure on an upper-surface side of the bonding portion in the state where the members are layered; a stroke controller controlling a gap between the supporting and the pressurizing bodies; and a heater raising a temperature of the bonding portion to a predetermined temperature range by directly or indirectly coming into contact with the members, in which the stroke controller controls a reduction ratio R (T.sub.0/T.sub.1) that represents a ratio of a thickness T.sub.0 of the bonding portion before bonding to a thickness T.sub.1 after the bonding, and the supporting body or/and the pressurizing body comprise a rod controlled in terms of stroke toward the bonding portions by a displacement meter or a stopper.