A display unit which displays information obtained from a machine tool that executes a machining program including a plurality of blocks as a plurality of program blocks identified by sequence numbers, includes: a data acquisition unit which acquires state information that indicates the state of the machine tool being operated as an amount of variation and a time axis, and timing information which indicates predetermined timing of the machining program executed by the machine tool; a chronological information generation unit which generates chronological information based on the state information and the timing information acquired; a superimposition unit which makes the timing indicated in the timing information coincide and which superimposes a plurality of pieces of the chronological information; and a display portion which displays the pieces of chronological information which are superimposed.

A machining tool assembly is provided for machining a blank to form a firearm lower receiver. The assembly includes a pair of side plates positionable on opposed sides of the blank to capture the blank therebetween. A template plate having a template aperture is adapted to be removeably attachable to the side plates. The template aperture is aligned with a top surface of the blank and is adapted for machining a cavity within the blank having a peripheral contour complimentary to a peripheral contour of the template aperture. A centering mechanism is adapted to be removeably attachable to the template plate, with the centering mechanism including an opening aligned with a corresponding void formed on the blank to align the blank with the template plate.

A modular cutting tool includes a cutting head, a shank and a mechanism which assists in assembling and locks the cutting head to the shank. The cutting head includes a cutting portion rotatable about a central longitudinal axis and a cylindrical skirt extending axially from the cutting portion and terminating at a contact face disposed perpendicular to the longitudinal axis. The skirt has a number of curved inner surfaces which generally define a bore disposed about the longitudinal axis. The shank includes a cylindrical portion of a first diameter disposed about the central longitudinal axis and a central protrusion disposed in the bore of the cutting portion. The central protrusion has a second diameter less than the first diameter and extends longitudinally from a contact face disposed perpendicular to the longitudinal axis at a leading end of the cylindrical portion.

The present invention provides a changing device for a multi-stage tool which has: a form-fit and/or frictional connection means that is configured to connect in a form-fit and/or frictional connection manner the changing device with a support device of a base aggregate, and a fastening means that is configured to connect the changing device with the multi-stage tool. The present invention further provides a method for changing a combination of a multi-stage tool and a changing device in an aggregate.

A blank holder and a blank are provided, the blank holder having a receiving area for a substantially disc-shaped blank, the receiving area being curved. The receiving area forms a straight, circular or part-circular or arc-shaped form-fitting profile. The blank has a matching guide shell which can be inserted or turned into the form-fitting profile.

A blank holder and a blank are provided, the blank holder having a receiving area for a substantially disc-shaped blank, the receiving area being curved. The receiving area forms a straight, circular or part-circular or arc-shaped form-fitting profile. The blank has a matching guide shell which can be inserted or turned into the form-fitting profile.

To provide a portal-shaped tear processing device which is capable of stably performing high precision tear processing.

Provided is a portal-shaped tear processing device including: a portal-shaped frame; a rail member; a controlled movement robot; and a tear processing means, in which the column member and the beam member have an outer shell portion, a filling member enclosed in the outer shell portion, and a hollow portion boring the filling portion along a major axis direction of the column member and the beam member.

To provide a portal-shaped tear processing device which is capable of stably performing high precision tear processing.

Provided is a portal-shaped tear processing device including: a portal-shaped frame; a rail member; a controlled movement robot; and a tear processing means, in which the column member and the beam member have an outer shell portion, a filling member enclosed in the outer shell portion, and a hollow portion boring the filling portion along a major axis direction of the column member and the beam member.

Provided is a turning and milling system, comprising: a work platform comprising a first drive mechanism; a rotating platform, said first drive driving said rotating platform to rotate on the said work platform and drive a workpiece to rotate about a vertical axis; a blade assembly comprising a blade and a second drive mechanism connected to the blade; said second drive mechanism drives the blade to move in the horizontal direction, changing the machining radius of the blade.

Provided is a turning and milling system, comprising: a work platform comprising a first drive mechanism; a rotating platform, said first drive driving said rotating platform to rotate on the said work platform and drive a workpiece to rotate about a vertical axis; a blade assembly comprising a blade and a second drive mechanism connected to the blade; said second drive mechanism drives the blade to move in the horizontal direction, changing the machining radius of the blade.