WERKZEUGWECHSELVORRICHTUNG FUER BEARBEITUNGSZENTRUM ODER AEHNLICHES.

摘要

A tool change apparatus for a machining center and the like comprises a spindle head (2) slidably mounted on a column (1), and a spindle (7) rotatably mounted in the spindle head (2). The spindle has at the lower end thereof a tapered tool reception bore (15) in which a tool (16) is releasably held. When a draw bar (17) is shifted upwards, resilient clamper arms (24) are forced to enter a reduced bore (14a) to be contracted thereby so that a head (16a) of the tool is clamped. When the draw bar is shifted downwards, engageable end portions (24a) are moved into an enlarged recess-like portion (14d) whereby the clamper arms (24) are allowed to expand outwards to release the head (16a) of the tool. Even when the head is released, a stop pin (33) urged by a spring (34) continues to engage the head of the tool whereby the tool is still held by the spindle. Tools are held by a series of magazine pots (36). Each pot is indexed to a tool change station (B). A tool change shaft (60) has two oppositely extending pairs of tool change (68) which function to transfer tools between an indexed tool pot and the spindle.