The invention relates to a device and method for a tool change in a driven or stationary tool holder using at least one industrial robot. A drive device for clamping and releasing the tool in a tool holding fixture of the tool holder prevents incorrect operation and can be operated manually or by the handling robot and can be actively locked to the tool holder.

A clamping fixture for clamping a component, in particular a workpiece or tool, having a number of clamping jaws, distributed along a periphery, which are connected by appropriate elastic flexural webs to a main body, wherein the clamping jaws are adjustable by an axially movable actuating device in a radial direction from a release position into a holding position, which clamping fixture is characterized in that the flexural webs, in their release position, are inclined in relation to an axially parallel direction radially in a direction of their respective holding positions.

A clamping fixture for clamping a component, in particular a workpiece or tool, having a number of clamping jaws, distributed along a periphery, which are connected by appropriate elastic flexural webs to a main body, wherein the clamping jaws are adjustable by an axially movable actuating device in a radial direction from a release position into a holding position, which clamping fixture is characterized in that the flexural webs, in their release position, are inclined in relation to an axially parallel direction radially in a direction of their respective holding positions.

An I.D. collet has a housing with a hollow bore and an undercut portion; a taper screw slidable into and out of the hollow bore of the housing and having a conical head; a spindle having a hollow bore in alignment with the hollow bore of the housing for receiving the conical head of the taper screw into and out of the hollow bore of the spindle such that the conical head enlarges the diameter of the spindle; and a draw nut assembly threadably connected to the taper screw and having tangs abutting the undercut portion of the housing when the spindle reaches a preset location in the hollow bore of the spindle to prevent further enlargement of the spindle when the tangs come into contact with the undercut portion of the housing.

A clamping fixture for clamping a component, in particular a workpiece or tool, having a number of clamping jaws, distributed along a periphery, which are connected by appropriate elastic flexural webs to a main body, wherein the clamping jaws are adjustable by an axially movable actuating device in a radial direction from a release position into a holding position, which clamping fixture is characterized in that the flexural webs, in their release position, are inclined in relation to an axially parallel direction radially in a direction of their respective holding positions.

The invention relates to a drive device for clamping and releasing a tool in the tool holding fixture of a tool holder. The drive device according to the invention prevents incorrect operation; said drive device can be operated manually or by a handling robot and can be actively locked to the tool holder.