摘要:
In a machine for machining edges of plates made of glass, marble and similar stony materials, the edge of a plate is guided on a pre-established path line (DI) so as to be in contact with the machining surface (9A) of at least a grinding wheel (9, 9', 9"); in order to set and/or correct the operating position of the grinding wheel (9, 9', 9") depending on its wear and tear, said grinding wheel is first led in contact with a fixed reference (18) and then pushed away from the latter; said movement is interrupted when its extent corresponds to a reference value indicating that the grinding wheel (9, 9', 9") has reached a desired operating position with respect to the path line (DI).
摘要:
Apparatus for removing material from a workpiece (102) is described, in which the apparatus comprises means (112) for advancing an abrasive tool (100) towards said workpiece (102) to bring an abrasive surface of the tool (100) into contact with the surface of the workpiece (102), means (104, 106) for moving said abrasive surface relative to the workpiece (102) to remove material from the workpiece M(102), means for detecting a load applied to said tool by said workpiece, and means (118) for controlling the rate of advancement of the abrasive tool towards the workpiece depending on the magnitude of the detected load.
摘要:
A machining apparatus (10) comprises a material removing tool (12) movably mounted for removing material from a workpiece (14); means for illuminating (42, 54) a sample area upon a tool surface (34) with excitation radiation; means for receiving (42, 54) sample light emitted from the sample area; a spectral analyzer (54) for performing a spectral analysis of the sample light received; and means for determining (60) the condition of the tool at the sample area from the spectral analysis of the sample light. The wear of the tool (12) is determined as such a condition. Operation parameters of the machining apparatus (10) are adjusted according to the determined wear. An example application is a wafer dicing tool.
摘要:
A method of taking up wear of a grinding wheel (7) on a machine (1) for grinding sheets (2) of glass, whereby the position of an abrasive surface (12) of the grinding wheel, initially set to an ideal work position such as to obtain a sheet of a given size, is adjusted, following wear of the grinding wheel (7), by moving the abrasive surface (12) towards a reference surface (31) on the machine (1), positioned facing and at a predetermined distance (A) from the abrasive surface (12) when the abrasive surface (12) is in the ideal work position; determining the instant of contact between the abrasive surface (12) and the reference surface (31); arresting the grinding wheel (7) at the instant of contact; and moving the abrasive surface (12) away from the reference surface (31) to an adjustment distance at least equal to the predetermined distance (A).
摘要:
Un outil d'usinage avec enlèvement de copeaux pourvu d'un corps tranchant (2), qui effectue l'usinage avec enlèvement de copeaux et est par conséquent sujet à l'usure et d'un support (4) du corps tranchant, comprend une couche d'une substance (5) qui absorbe et/ou émet sélectivement à des longueurs d'ondes spécifiques un rayonnement électromagnétique, ladite couche étant agencée entre le corps tranchant (2) et le support (4) du corps tranchant, encastrée dans une couche d'un autre matériau (4) ou constituant une couche de revêtement (42) d'un support indicateur (41) qui forme un élément séparé relié au corps tranchant (2). Afin de mesurer l'usure, un dispositif émetteur (11, 12, 13) qui produit un faisceau lumineux de manière sélective est orienté vers l'élément de coupe (2) et un dispositif récepteur (14, 15, 16) qui reçoit le faisceau de manière sélective est orienté vers l'outil (1) de manière à recevoir le faisceau envoyé par l'émetteur vers l'outil (11) et le faisceau reflété par l'outil, produisant ainsi un signal d'indication (S1, S2, S3).