{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9791847","patent":{"patent_number":"US-9791847","title":"Method of calculating a stable spindle rotation number and an apparatus for calculating a stable spindle rotation number","assignee":null,"inventors":[],"filing_date":"2015-05-19T00:00:00.000Z","publication_date":"2017-10-17T00:00:00.000Z","cpc_codes":["G05B","G05B","G05B","G05B","G05B","G05B"],"num_claims":14,"abstract":"An apparatus includes vibration data obtainer 30 obtaining data on vibration caused by a tool in cutting, a vibration frequency calculator 22 calculating a vibration frequency of the tool by analyzing the obtained vibration data, a regenerative chatter detector 23 detecting whether regenerative chatter occurs by comparing the calculated vibration frequency of the tool with a spindle rotation number, and a spindle rotation controller 24 gradually decreasing or increasing the spindle rotation number when occurrence of regenerative chatter vibration is detected, and a stable rotation number calculator 25 monitoring variation of the vibration frequency of the tool and determining a spindle rotation number when the variation of the vibration frequency exceeds a predetermined reference value to be a stable rotation number."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of calculating a stable spindle rotation number and an apparatus for calculating a stable spindle rotation number","description":"An apparatus includes vibration data obtainer 30 obtaining data on vibration caused by a tool in cutting, a vibration frequency calculator 22 calculating a vibration frequency of the tool by analyzing","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9791847","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9791847","citation_suggestion":"Patentable. \"Method of calculating a stable spindle rotation number and an apparatus for calculating a stable spindle rotation number\" (US-9791847). https://patentable.app/patents/US-9791847","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9791847","json":"https://patentable.app/api/llm-context/US-9791847","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:18:08.832Z"}