Patent ReferencesAdaptive control of cutting machining operations Automatic machining using constructive solid geometry with Boolean combinations of primitives including tool offsets to form a machining pattern Apparatus and method for forming an integral object from laminations System for automatically generating tool path data for automatic machining center Workpiece machining apparatus and method Solid modeling based adaptive feedrate control for NC machining Method for generating tool path Machine tool with improved spindlehead mounting and traversing means Position control method in which a cartesian point is transformed through two cartesian coordinate systems Method and apparatus for producing parts by selective sintering InventorsAssigneeApplicationNo. 156321 filed on 11/23/1993US Classes:700/182, Including CAD, CAM, or CIM technique345/420, Solid modelling700/119Rapid prototyping (e.g., layer-by-layer, material deposition)ExaminersPrimary: Ruggiero, JosephAttorney, Agent or FirmInternational ClassesG06F 015/46G06F 015/72 AbstractA method of automatically operating a machine with respect to an object having a desired profile, wherein the machine's operation is controlled based on a model of the object's profile. The method includes generating at least a portion of the model in the form of a plurality of successive layers wherein the cross-section of each layer is defined by the intersection of a pair of parallel planes and a model profile connecting the parallel planes. Each layer's thickness is selected such that the geometrical error between the object's desired profile and the model profile of the layer remains no greater than a preselected geometrical error. More than one layer thickness is selected during the step of generating this portion of the object. The machine can be operated in successive steps with each step based on a separate one of the layers.Other References
Field of SearchIncremental layer molding typeWITH MEASURING, TESTING, OR INSPECTING To produce composite, plural part or multilayered article Sequential formation of portion on same mold or a preform surface MEANS APPLYING ELECTRICAL OR WAVE ENERGY DIRECTLY TO WORK Radiated energy Contour or profile photography to reproduce three-dimensional objects Relief or intaglio representations of three-dimensional objects (e.g., relief modeling of photographs) Before final assembly; e.g., to cure lamina, etc. Before and after final assembly To polymerize or cure material in work With direct application of electrical, magnetic, or radiant energy to work With testing, measuring, and/or indicating means With means to assemble laminae or position them relative to each other With plural diverse heating means | |