A laser cutting device includes a control unit configured to control operations of a laser machining robot and a laser oscillator. Machining condition tables are stored in memory of the control unit. Each of the machining condition tables includes data of a laser power output and a duty, a usable range of a cutting speed of cutting a workpiece, the usable range being set based on a speed range in which a laser cutting robot can move with given tracking accuracy, and an effective range of the cutting speed and the laser power output that are set so that a cut surface of the workpiece meets given finishing conditions. The control unit is configured to select one of the machining condition tables so that the cutting speed and the laser power output meet given conditions, and control cutting of the workpiece based on the selected machining condition table.

A determining tool for use in determining the shape of the tip end of a machining tool that machines a workpiece held on a table while the machining tool moves relatively to the table includes a bottom surface adapted to be held on the table and a flat slanting surface inclined to the bottom surface and oriented across a direction in which the machining tool moves relatively to the table, the flat slanting surface being adapted to be cut through by the tip end of the machining tool.

A determining tool for use in determining the shape of the tip end of a machining tool that machines a workpiece held on a table while the machining tool moves relatively to the table includes a bottom surface adapted to be held on the table and a flat slanting surface inclined to the bottom surface and oriented across a direction in which the machining tool moves relatively to the table, the flat slanting surface being adapted to be cut through by the tip end of the machining tool.

An on-machine measurement device that locates a tip position of a blade of a machining tool provided on a machining device includes: a measurement unit configured to measure, in a workpiece that has been machined by the machining tool, a height of a reference plane not machined by the machining tool and a height of a machined surface machined by the machining tool; and a locating unit configured to locate the tip position of the blade of the machining tool based on information on a machining depth specified at the time of machining of the workpiece, and the height of the reference plane and the height of the machined surface that are measured by the measurement unit.

The present invention quickly determines causes of shape errors, machined surface defects, etc. by comparing the machined surface shape calculated on the basis of the actual motor position, and the machined surface shape obtained by actually measuring the machined surface of a machined workpiece. This determining system is equipped with: a motor position acquisition unit for acquiring the actual position of a motor for driving the drive shaft of a machine tool; a tool information acquisition unit for acquiring tool information which includes the machine tool driveshaft configuration, the instrument shape and the unmachined workpiece shape; a motor position machined surface calculation unit for calculating the shape of the machined surface of the machined workpiece on the basis of the tool information and the actual position of the motor; an actual machined surface acquisition unit for acquiring the shape of the machined surface of an actually machined workpiece; and a machined surface analysis unit for comparing a first correlation, which is the correlation between the shape of the machined surface calculated by the motor position machined surface calculation unit and the shape of the machined surface acquired by the actual machined surface acquisition unit.

The present invention quickly determines causes of shape errors, machined surface defects, etc. by comparing the machined surface shape calculated on the basis of the actual motor position, and the machined surface shape obtained by actually measuring the machined surface of a machined workpiece. This determining system is equipped with: a motor position acquisition unit for acquiring the actual position of a motor for driving the drive shaft of a machine tool; a tool information acquisition unit for acquiring tool information which includes the machine tool driveshaft configuration, the instrument shape and the unmachined workpiece shape; a motor position machined surface calculation unit for calculating the shape of the machined surface of the machined workpiece on the basis of the tool information and the actual position of the motor; an actual machined surface acquisition unit for acquiring the shape of the machined surface of an actually machined workpiece; and a machined surface analysis unit for comparing a first correlation, which is the correlation between the shape of the machined surface calculated by the motor position machined surface calculation unit and the shape of the machined surface acquired by the actual machined surface acquisition unit.

In a data obtaining step, a data obtaining unit may obtain certain data at a plurality of sampling times. The data may include measurement information regarding the amount of wear of the cutting tool and measurement information regarding a physical quantity of the cutting tool during cutting. In a clustering step, a clustering unit may cluster a plurality of pieces of the obtained data on the basis of the measurement information regarding the physical quantity included in each of the plurality of pieces of data. In a model creation step, a model creation unit may create, for each of clusters on the basis of the measurement information regarding the physical quantity and the measurement information regarding the amount of wear included in the data, a model for obtaining estimation information regarding the amount of wear from new measurement information regarding the physical quantity.

A method and system for optimal control of ultra-precision cutting. The method for optimal control is based on time-precipitates-temperature characteristics of Al—Mg—Si series aluminum alloy, and includes first determining types of precipitates of machined materials, and establishing a Lifshitz-Slyozov-Wagner (LSW) model of each precipitate. A temperature range is determined corresponding to each precipitate according to the LSW model to obtain a comprehensive temperature range. A relation model is established between cutting parameters and a cutting temperature according to the LSW model. Finally the cutting parameters are optimized according to the comprehensive temperature range and the relation model, so that the cutting temperature is beyond the comprehensive temperature range to inhibit the generation of the precipitates.

A method and system for optimal control of ultra-precision cutting. The method for optimal control is based on time-precipitates-temperature characteristics of Al—Mg—Si series aluminum alloy, and includes first determining types of precipitates of machined materials, and establishing a Lifshitz-Slyozov-Wagner (LSW) model of each precipitate. A temperature range is determined corresponding to each precipitate according to the LSW model to obtain a comprehensive temperature range. A relation model is established between cutting parameters and a cutting temperature according to the LSW model. Finally the cutting parameters are optimized according to the comprehensive temperature range and the relation model, so that the cutting temperature is beyond the comprehensive temperature range to inhibit the generation of the precipitates.

Method for the optical measurement of at least one measurand on a workpiece, including: providing a workpiece to be measured, wherein the workpiece comprises a cyclically symmetrical geometry, such as a toothing or the like; specifying the at least one measurand on the workpiece; providing a measuring device having an optical measuring system for the contactless measurement of the measurand on the workpiece, wherein the optical measuring system has an optical sensor; measuring the at least one measurand on the workpiece using the optical measuring system;
characterized by providing at least one geometrical parameter of the workpiece to be measured; and determining at least one measurement parameter for carrying out the optical measurement on the basis of the at least one measurand on the workpiece and/or the at least one geometrical parameter of the workpiece to be measured.