Dentsply Sirona Inc.

Heidelberger Druckmaschinen Ag

Sirona Dental Systems Gmbh

Oliver Nowarra

Peter Fornoff

Joachim Pfeiffer

Franz Basler

Jochen Bechtler

Hans-Christian Schneider

Ulrich Luckhardt

Daniel Weiss

Willi Stutz

Peter Burger

Peter Faltin

Daniel Weiß

Philipp Grimm

Andreas Schaefer

Michael Turzer

Sebastian Steger

A computer-implemented method of planning of the shapes of free-form tool paths (P) for simultaneous two-sided machining of a dental restoration () having an individual free-form target geometry from a workpiece () by using a dental tool machine () having at least two tool spindles each having at least one tool () arranged on a different side of the workpiece () which is simultaneously movable along an axis (y) relative to the tools () thereby imposing a kinematic axis coupling. The method includes a step of determining transformations (T', T″) of the target geometry by which the kinematic axis coupling is converted into a common coupling parameter for both tools (); and a step of generating dependent on these transformations (T′, T″) the shapes of the free-form tool paths (P) in which the common coupling parameter is identical in time for all participating tool spindles that are driven simultaneously.

Method of planning free-form tool paths for simultaneous two-sided machining with kinematic axis coupling

In the method for producing medical, in particular dental fitting bodies with a specified or custom three-dimensionally curved outer contour or preform of the fitting body with a rough outer contour, which has an allowance relative to the outer contour, a workpiece from which the fitting body or its preform is produced, is machined in a material-removing manner by means of a tool engaging in the workpiece The tool path has directional components transverse to the run of the contour to be produced and the cutting edges have a defined geometry. The tool engages into the workpiece at a cutting arc angle alpha of the circumferential surface of less than 90° on average and at an insertion depth of at least twice the tool diameter (D) and the machining of the workpiece occurs along a tool path with directional components contrary to a machining direction following the outer contour.

Method for producing dental fitting bodies and workpiece for this purpose

A method of manufacturing a dental restoration including a construction step (S) of preparing construction data for a dental tool machine for machining the dental restoration from a workpiece. The construction data defines at least the geometry of the dental restoration within the workpiece. The method includes a starting step (S) of starting machining of the dental restoration from the workpiece in accordance with the construction data. The method also includes a preparing step (S) of starting preparing, before termination of the construction step (S), the dental tool machine at least through equipping it with all the consumables essential for starting the starting step (S), and completing preparing the dental tool machine before start of the starting step (S).

Method of manufacturing a dental restoration

The present invention relates to a method for the design and manufacture of a dental component with a surface, wherein a 3D model of the dental component is designed by means of a CAD unit and the dental component is manufactured by a CAM unit on the basis of the 3D model. In order to provide a method which significantly shortens the time required for the design and manufacture of a dental component, so that the length of the dental session at which the patient must be present is shortened, it is inventively proposed that the 3D model is manufactured in at least one first design step, in which a first 3D submodel is designed with at least one first surface section, and a second design step in which a second 3D submodel is designed with at least one second surface section, wherein the first design step is completed before the second design step and the CAM unit begins the manufacture of the first surface section of the dental component based on the first 3D submodel before the design of the second 3D submodel is completed.

Method for the design and manufacture of a dental component

The invention relates to a method for constructing at least one dental prosthetic part or a bracket, with at least one adhesive surface, in which aD model is made of the dental prosthetic part. Recesses are constructed on the adhesive surface of theD model.

Method for constructing at least one dental prosthetic part or a bracket having at least one adhesive surface

A method for operating a printing machine in a print operating mode and another operating mode, for example a maintenance mode. In the print operating mode, bringing a vibrating roller periodically into contact with a first roller of an inking unit, driving the first roller rotationally by a first motor, driving a second roller of the inking unit rotationally by a second motor, transmitting no torque from the first motor to the second roller through a clutch therebetween, and activating the first motor by a control device causing the first roller to rotate at a rotational speed in a constant ratio to a rotational speed of the second roller. In the other operating mode, driving the first and second rollers rotationally by the first motor and transmitting torque from the first motor to the second roller through the clutch. A printing machine for carrying out the method Is also provided.

Method of operating a printing machine and printing machine for carrying out the method

An apparatus for feeding sheets in sheet-processing machines includes a transport belt which transports sheets from a first location to a second location. The transport belt can be driven at variable speed by a drive. The speed of the transport belt can be controlled by a control device in such a way that, through the use of a combination of at least two speed profiles, the number of sheets on the transport belt and the transfer of the sheets at the first and second locations can be adjusted. A printing press having the apparatus is also provided.

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Leimen, Germany

Oliver Nowarra