摘要:
Provided is a surface treatment method for performing machining such as cutting work, grinding, and electrical discharging to a plate-like material with two- or three-dimensional deformation to realize a uniform thickness. This method includes the steps of mounting the plate-like material on a surface plate, setting a coordinate axis in a plane direction of the plate-like material to be X, Y and setting a coordinate axis in a height direction of the plate-like material to be Z, virtualizing a surface containing an origin of the measured Z direction, measuring a height Z 1-n from the origin in an arbitrary plane position, and inclining and cutting the plate-like material so that an absolute value of a difference between a maximum value Z max and a minimum value Z min of the obtained height data will be minimum. Although a ceramic sintered plate such as a sputtering target or a metal plate prepared by metal rolling or forging, in most instances, is subject to two- or three-dimensional deformation as a result of thermal stress or machining stress during the manufacturing process, this invention is able to obtain a flat plate-like material having a uniform thickness and minimal machining costs from a plate-like material with two-or three-dimensional deformation.
摘要:
A dynamical instrument for machining comprising a sensor responsive to a non-rotating part of a machine proximate the tool of the machine for outputting a vibration signal, and a processor responsive to the sensor output configured to calculate a plurality of signature quantities which characterize the dynamics of the vibration signal and correlate the signature quantities to detect parameters associated with the operation of the machine.
摘要:
A worked surface of a workpiece is evaluated on the basis of how the surface is actually perceived by a person's (observer's) eyes (vision) or fingers (touch), and a work process whereby a workpiece is worked is changed on the basis of the evaluation.
摘要:
A method of using a mathematical model to adaptively control surface roughness when machining a series of workpieces or segments by: (a) linearizing a geometrical surface roughness model; (b) initializing said model essentially as a function of feed; and (c) subjecting the initialized model to computerized estimation based on roughness and feed values taken from the last machined workpiece, thereby to determine the largest allowable feed for attaining a desired surface roughness in subsequently machined workpieces or segments of the series. The mathematical model is an algorithm of the form R = [1262.79]f²/r. The model is linearized and initialized to give the form R = β₁s R f+β₂R max where R is the actual roughness and R max is desired roughness, f is actual feed, β₁ and β₂ are coefficients to be updated by estimation, and s R is a scale factor chosen to make the first term have the same order of magnitude as the second term. Computerized estimation is carried out by converting the above initialized linear model to vector matrix notation with provision for the estimated coefficients in the form R n = ϑ T x n , where R n is measured roughness, x n is a computed vector taken from measured feed, and ϑ is a vector to be estimated with "T" denoting the transpose of the vector. After inserting roughness and feed values into such vector model, taken from the last machined workpiece, the coefficients are recursively estimated by sequential regression analysis.
摘要:
A worked surface of a workpiece is evaluated on the basis of how the surface is actually perceived by a person's (observer's) eyes (vision) or fingers (touch), and a work process whereby a workpiece is worked is changed on the basis of the evaluation.
摘要:
Eine solche Vorrichtung, mit der vornehmlich plattenförmige Werkstücke aus Holz oder Holzersatzstoffen bearbeitet werden, hat ein Fräsaggregat, dessen Fräser den Oberflächenunebenheiten der durchlaufenden Werkstücke nachgeführt wird. Dafür ist eine entsprechend die Oberflächenunebenheiten der Werkstücke abtastende, den Fräser steuernde Abtasteinrichtung vorhanden. Um die Werkstückoberseiten berührungslos abtasten und das Fräsaggregat und/oder den Fräser reaktionsschnell verfahren zu können, besteht die Abtasteinrichtung aus einem optischen Sensor und sind das Fräsaggregat und/oder der Fräser an einem Support mittels eines Stellantriebes relativ zu der Ebene der durchlaufenden Werkstücke verfahrbar angeordnet. Hierbei tastet der optische Sensor an einer Stelle entgegen der Durchlaufrichtung in Abstand vor dem Fräser die Werkstückoberseiten ab und steuert entsprechend zeitverzögert über eine Auswerteinheit den Stellantrieb. Ferner ist der optische Sensor in räumlichem Abstand vom Fräser angeordnet.
摘要:
A method of using a mathematical model to adaptively control surface roughness when machining a series of workpieces or segments by: (a) linearizing a geometrical surface roughness model; (b) initializing said model essentially as a function of feed; and (c) subjecting the initialized model to computerized estimation based on roughness and feed values taken from the last machined workpiece, thereby to determine the largest allowable feed for attaining a desired surface roughness in subsequently machined workpieces or segments of the series. The mathematical model is an algorithm of the form R = [1262.79]f²/r. The model is linearized and initialized to give the form R = β₁s R f+β₂R max where R is the actual roughness and R max is desired roughness, f is actual feed, β₁ and β₂ are coefficients to be updated by estimation, and s R is a scale factor chosen to make the first term have the same order of magnitude as the second term. Computerized estimation is carried out by converting the above initialized linear model to vector matrix notation with provision for the estimated coefficients in the form R n = ϑ T x n , where R n is measured roughness, x n is a computed vector taken from measured feed, and ϑ is a vector to be estimated with "T" denoting the transpose of the vector. After inserting roughness and feed values into such vector model, taken from the last machined workpiece, the coefficients are recursively estimated by sequential regression analysis.