A heat treatment apparatus for hot stamping includes a frame, and heating units provided to be vertically movable at both upper and lower sides of the frame and configured to heat a cold formed steel plate by electrifying the steel plate. Cooling units are provided to be vertically movable at centers of the upper and lower sides of the frame and are configured to cool the heated steel plate while pressurizing the steel plate from upper and lower sides.

A heat treatment apparatus for hot stamping includes a frame, and heating units provided to be vertically movable at both upper and lower sides of the frame and configured to heat a cold formed steel plate by electrifying the steel plate. Cooling units are provided to be vertically movable at centers of the upper and lower sides of the frame and are configured to cool the heated steel plate while pressurizing the steel plate from upper and lower sides.

Disclosed are a method and an apparatus for forging dissimilar materials. The apparatus includes a press, a tray plate supply unit that supplies a tray plate by one pitch from one side to an opposite side, punching parts that continuously form material passing/fixing parts in the tray plate, a material plate supply unit that supplies a material plate to the upper sides of the material passing/fixing parts by one pitch, cutting/pressing parts that repeatedly cut the material plate introduced to upper sides of the material passing/fixing parts and fix the cut materials to the material passing/fixing parts after pressing the materials, pressing parts that press the moved materials, and extraction parts that separate and extract the formed materials.

Disclosed are a method and an apparatus for forging dissimilar materials. The apparatus includes a press, a tray plate supply unit that supplies a tray plate by one pitch from one side to an opposite side, punching parts that continuously form material passing/fixing parts in the tray plate, a material plate supply unit that supplies a material plate to the upper sides of the material passing/fixing parts by one pitch, cutting/pressing parts that repeatedly cut the material plate introduced to upper sides of the material passing/fixing parts and fix the cut materials to the material passing/fixing parts after pressing the materials, pressing parts that press the moved materials, and extraction parts that separate and extract the formed materials.

The present invention relates to a method at the material processing by the use of high kinetic energy, comprising a piston which is driven from a start position by a hydraulic system pressure (pS) by means of a drive chamber in order, by only one stroke, to transfer high kinetic energy to a blank/tool to be processed, whereafter there is a risk that a rebound of the piston will occur, and the method comprises that a step is taken in connection with said stroke performed, which step prevents said piston from making a rebound with an essential content of kinetic energy in order to avoid negative effects as a result of a rebound, whereafter the piston is returned to said start position by means of a second chamber, wherein said step comprises that a valve means closes the driving connection between the system pressure (pS) and the piston, wherein said step comprises that said valve means is controlled by a pilot valve controlling the entire striking progress, and that said second chamber is pressurized with the system pressure (pS) during the entire striking progress.

A bending device according to one aspect of the present invention includes a track device which linearly extends in a predetermined direction, first and second bases placed on the track device and movable on the track device, a first robot mounted on the first base, a second robot mounted on the second base, and a bending mechanism which is disposed at each end of the first and second robots and grips and bends the workpiece. The first robot is a multi-articulated robot including a joint rotatable around an axis vertical to the first base and a joint rotatable around an axis parallel to the axial direction of the workpiece. The second robot is a multi-articulated robot including a joint rotatable around an axis vertical to the second base and a joint rotatable around an axis parallel to the axial direction of the workpiece.

A method of spicing together and joining ends of a first member and a second member includes the steps of: arranging the ends of the first member and the second member in side-by-side manner; placing a coupling sleeve over the ends of the first member and the second member; and using a portable, hot-swaged coupling device to heat and crimp the coupling sleeve about the ends of the first and second member, thereby joining the ends of the first and second members.

In a forming apparatus, journal dies hold and retain rough journal portions of a preform blank therebetween, and reference crank pin die and movable crank pin dies contact rough crank pin portions thereof. In this state, the journal dies and the movable crank pin dies are moved axially toward the reference crank pin die and the reference crank pin die and the movable crank pin dies are moved perpendicular to an axial direction. With this, rough crank arm portions are axially compressed to reduce their thickness to that of crank arms of a forged crankshaft, and the rough crank pin portions are pressed perpendicular to the axial direction to increase an amount of eccentricity to that of the forged crankshaft crank pins. Consequently, it is possible to form a blank for finish forging having a shape generally in agreement with a shape of the forged crankshaft for a three-cylinder engine.

In a forming apparatus, journal dies hold and retain rough journal portions of a preform blank therebetween, and reference crank pin die and movable crank pin dies contact rough crank pin portions thereof. In this state, the journal dies and the movable crank pin dies are moved axially toward the reference crank pin die and the reference crank pin die and the movable crank pin dies are moved perpendicular to an axial direction. With this, rough crank arm portions are axially compressed to reduce their thickness to that of crank arms of a forged crankshaft, and the rough crank pin portions are pressed perpendicular to the axial direction to increase an amount of eccentricity to that of the forged crankshaft crank pins. Consequently, it is possible to form a blank for finish forging having a shape generally in agreement with a shape of the forged crankshaft for a three-cylinder engine.

Disclosed are a method and an apparatus for forging dissimilar materials. The apparatus includes a press, a tray plate supply unit that supplies a tray plate by one pitch from one side to an opposite side, punching parts that continuously form material passing/fixing parts in the tray plate, a material plate supply unit that supplies a material plate to the upper sides of the material passing/fixing parts by one pitch, cutting/pressing parts that repeatedly cut the material plate introduced to upper sides of the material passing/fixing parts and fix the cut materials to the material passing/fixing parts after pressing the materials, pressing parts that press the moved materials, and extraction parts that separate and extract the formed materials.