TOOL WEAR ESTIMATING METHOD

• Main Authors: OKAMOTO YUSUKE, YAZAWA TAKAAKI, KAZU YUTA, HIROSE TAISHI, KATO TOMONORI, OSADA NAOKO, NISHIDA KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• Subjects: BEARINGS; BLASTING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a tool wear estimating method that enables tool wear to be estimated in an in-process state during processing, without providing a tool itself with a sensor.SOLUTION: A first relational expression, which shows correspondence between supply pressure of compressed air required to maintain a predetermined rotational speed of a spindle and a flank wear amount of a tool, is determined. A second relational expression, which shows correspondence between a processing distance and the supply pressure of the compressed air on the basis of a measurement value of the supply pressure of the compressed air in a predetermined processing distance, is determined. A supply pressure prediction value in the next processing distance is estimated by the second relational expression. The flank wear amount of the tool in the next processing distance is estimated by using the supply pressure prediction value and the first relational expression.SELECTED DRAWING: Figure 11 【課題】工具そのものにセンサを設けることなく、工具損耗を加工中のインプロセスで推定することが可能な工具損耗推定方法の提供。【解決手段】スピンドルの所定の回転速度を保持するために必要な圧縮空気の供給圧力と工具の逃げ面摩耗量との対応を示す第１の関係式を求め、所定の加工距離における圧縮空気の供給圧力の測定値に基づいて加工距離と圧縮空気の供給圧力との対応を示す第２の関係式を求め、第２の関係式により、次の加工距離における供給圧力予測値を推定し、供給圧力予測値と第１の関係式を用いて次の加工距離での工具の逃げ面摩耗量を推定する。【選択図】図１１