METHOD OF PLANNING FREE-FORM TOOL PATHS FOR SIMULTANEOUS TWO-SIDED MACHINING WITH KINEMATIC AXIS COUPLING

• Main Authors: FALTIN, Peter, NOWARRA, Oliver
• Format: Patent
• Language: English; French; German
• Published: 17.08.2022
• Subjects: APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DENTISTRY; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; HUMAN NECESSITIES; HYGIENE; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; MEDICAL OR VETERINARY SCIENCE; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; POLISHING; TRANSPORTING

The present invention provides a computer-implemented method of planning of the shapes of free-form tool paths (P) for simultaneous two-sided machining of a dental restoration (1) having an individual free-form target geometry from a workpiece (2) by using a dental tool machine (3) comprising at least two tool spindles each having at least one tool (4) arranged on a different side of the workpiece (2) which is simultaneously movable along an axis (y) relative to the tools (4) and thereby imposing a kinematic axis coupling, characterized by further comprising: 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 (4); 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.