Kayaba Industry Company, Ltd.

Kayaba Industryco., Ltd.

Keisuke Mishima

Hirofumi Kuroda

Naomasa Tsuda

Shigetoshi Ogiso

A closing machine () for closing an open end of a work piece () by pressing a die () against the work piece () rotating about an axial center comprises a chuck spindle () that drives the work piece () to rotate, a chuck sliding support mechanism () that supports the work piece () so that the work piece () can move in a rotary axis direction relative to the chuck spindle (), and a thrust stopper () that causes an end portion of the work piece (), which is moved by a load applied from the die (), to abut against the thrust stopper () such that the work piece () is supported in a predetermined closing position.

Closing method and closing machine

A closing machine includes left and right chuck spindles () for driving a work piece () to rotate, a chuck spindle moving device () which moves the respective chuck spindles () in a horizontal direction orthogonal to a rotary axis Othereof, and left and right slide stoppers () for restricting the movement of the chuck spindles (). The work piece () is introduced into each chuck spindle (), and the chuck spindle moving device () moves the respective chuck spindles () until the movement of the respective chuck spindles () is stopped by the respective slide stoppers (). During a closing operation, the rotary axis Oof the chuck spindle () and a rotary axis Oof a die () are offset in the horizontal direction by an offset S.

A closing machine () for closing a rotating work piece () by pressing a heated die () against the work piece () comprises an air purge box () which opens onto the vicinity of the work piece (), air supply means for supplying air to the air purge box (), and a sensor () provided in the interior of the air purge box () to detect a state of the work piece () or the die ().

A press-molding device () press molds a bottom portion of a work piece () having a closed-end shape between an, inner die () inserted into the work piece () and an outer die () disposed on an outside of the work piece (). A chuck position switching mechanism () grips the work piece () so that the work piece () can move in an axial direction. An inner die moving mechanism () inserts the inner die () into the inside end of the work piece (). A stopper mechanism () supports the inner die () in a processing position by restricting movement of the inner die (). An outer die moving mechanism () press-molds the bottom portion of the work piece () between the outer die () and the inner die (), thereby press-molding the workpiece () smoothly without damaging an inner peripheral surface of the workpiece ().

Press-molding method and press-molding device

A cooling device () for cooling a work piece () that has reached a high temperature due to the implementation of a closing operation in which a bottom portion () is formed by closing an end portion of the tubular work piece () comprises a tilting mechanism () which tilts the work piece () such that the bottom portion () faces downwards and a cooling water tank () storing cooling water. The bottom portion () of the work piece () tilted by the tilting mechanism () is submerged in cooling water stored in the cooling water tank ().

Cooling method and cooling device

A closing machine () for closing a work piece () by pressing a rotating die () against the rotating work piece () comprises a die support shaft () that supports the die (), which is disposed coaxially with the work piece (), rotatably, a power transmission mechanism () which transmits the torque of a motorto the die support shaft () and a one-way clutch () which blocks torque that is input into the power transmission mechanism () from the die support shaft (). During a closing operation, the die () is pressed against the work piece () so as to contact the work piece () slidingly such that the die () rotates in accordance with the work piece (), which rotates at a higher speed than the die ().

A closing devicewhich presses a dieagainst a rotating pipe bodysuch that an open end portion of the pipe bodyis plastically closed by the dieincludes a cored barinserted into the pipe bodyto close the open end portion of the pipe bodyon the opposite side of the dieand a reactive force applying mechanismwhich allows the cored barto retreat and applies a reactive force to the retreating cored barwhen the cored barreceives a predetermined load or more during processing of the pipe bodyby the die

Closing device and closing method

In a closing machine (), an inner diameter chuck () that grips an inner peripheral surface of a work piece (), a work piece () introducing device that moves the inner diameter chuck () in a Y axis direction of the work piece (), and an introduction stopper () that projects onto an introduction path of the work piece () are used in such a manner that the inner diameter chuck () grips the inner peripheral surface of the work piece () while the work piece () abuts against the introduction stopper (), the introduction stopper () is removed from the introduction path of the work piece (), and the work piece () is introduced into an outer diameter chuck () by moving the inner diameter chuck () in the Y axis direction of the work piece ().

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Tokyo, Japan

Keisuke Mishima