[특허]Non-concentric milling

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IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G05B-019/402 G05B-019/4093
출원번호	US-0980391 (2015-12-28)
등록번호	US-10108176 (2018-10-23)
발명자 / 주소	Sherbrooke, Evan C. Coleman, Glenn
출원인 / 주소	Celeritive Technologies, Inc.
대리인 / 주소	Perkins Coie LLP
인용정보	피인용 횟수 : 0 인용 특허 : 42

초록 ▼

Technology for milling selected portions of a workpiece by a cutting tool of a numerical control machine is described. The described technology provides methods and apparatuses for milling areas of a part so that more aggressive machining parameters can be used in the toolpath, thereby resulting in reduced machining time and load. The technology creates a series of toolpath contours where arcs in the toolpath contours are non-concentric with arcs in other toolpath contours. The selected portions of the workpiece are milled by moving the cutting tool in accordance with the toolpath.

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1. A method for milling selected portions of a workpiece by a cutting tool of a numerical control machine, the numerical control machine having associated therewith a processor and a memory, the method comprising: receiving one or more chains of curves inside a workpiece representing a previously generated toolpath for milling selected portions of a workpiece;replacing at least one circular arc in the previously generated toolpath with a sequence of curves containing a new circular arc closer to the boundary of the workpiece to generate a revised toolpath; andmilling the selected portions of the workpiece by moving the cutting tool in accordance with the revised toolpath. 2. The method of claim 1, wherein a center of the new circular arc lies on a predetermined line. 3. The method of claim 2, wherein the predetermined line connects the center of the replaced circular arc to a midpoint of the replaced circular arc. 4. The method of claim 1, wherein the previously generated toolpath has one or more passes, and a distance from a center of the replaced arc to a center of the new circular arc is determined by a process that results in inner passes of the revised toolpath being closer together than outer passes along at least one portion of the revised toolpath. 5. A non-transitory computer-readable storage device storing computer-executable instructions that, when executed, perform a method for milling selected portions of a workpiece by a cutting tool of a numerical control machine, the numerical control machine having associated therewith a processor and a memory, the method comprising: receiving one or more chains of curves inside a workpiece representing a previously generated toolpath for milling selected portions of a workpiece;replacing at least one circular arc in the toolpath with a sequence of curves containing a new circular arc closer to the boundary of the workpiece to generate a revised toolpath; andcausing milling of the selected portions of the workpiece, wherein the milling includes moving the cutting tool in accordance with the revised toolpath. 6. The computer-readable storage device of claim 5, wherein a center of the new circular arc lies on a predetermined line. 7. The computer-readable storage device of claim 6, wherein the predetermined line connects the center of the replaced circular arc to a midpoint of the replaced circular arc. 8. The computer-readable storage device of claim 5, wherein the previously generated toolpath has one or more passes, and a distance from a center of the replaced arc to a center of the new circular arc is determined by a process that results in inner passes of the revised toolpath being closer together than outer passes along at least one portion of the revised toolpath. 9. A system for milling selected portions of a workpiece, comprising: a cutting tool associated with a numerical control machine;one or more processors associated with the numerical control machine, the one or more processors configured to: receive one or more chains of curves inside a workpiece representing a first toolpath for milling selected portions of a workpiece;replace at least one circular arc in the toolpath with a sequence of curves containing a new circular arc closer to the boundary of the workpiece to generate a second toolpath; andcause milling of the selected portions of the workpiece by moving the cutting tool in accordance with the second toolpath. 10. The system of claim 9, wherein a center of the new circular arc lies on a predetermined line. 11. The system of claim 10, wherein the predetermined line connects the center of the replaced circular arc to a midpoint of the replaced circular arc. 12. The system of claim 9, wherein the first toolpath has one or more passes, and a distance from a center of the replaced arc to a center of the new circular arc is determined by a process that results in inner passes of the second toolpath being closer together than outer passes along at least one portion of the second toolpath.

이 특허에 인용된 특허 (42)

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Rathi Rajendra P. (West Chester OH) Fairbourn David C. (Fairfield OH) Nurre Joseph H. (Athens OH), Method and system for machining contoured parts.
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Jamalabad, Vikram R.; Chard, Jeffrey A.; Gasdaska, Charles J., Tool path planning process for component by layered manufacture.
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