摘要:
A milling tool and a workpiece each may be rotated at a rotational velocity of at least 25 m/min in a compound machining operation. Disclosed are a computer numerically controlled machine, a method for operation of a computer numerically controlled machine, a computer program product, and a method for determining compound machining parameters. In some embodiments, a processing parameter for compound machining is selected and other processing parameters are algorithmically determined based thereon.
摘要:
A machine tool comprising: a first body; a first leg, a second leg, and a third leg coupled to the first body via first joints and configured to support at least the first body; a second body including a tool holder; a fourth leg, a fifth leg, and a sixth leg coupled to the second body via second joints and configured to support at least the second body; and a first actuator coupled to the first body and to the second body, the first actuator being configured to cause rotational motion between the first body and the second body to enable a change in walking direction of the machine tool and/or to enable a change in machining stiffness and a change in work volume of the machine tool.
摘要:
A wafer polishing apparatus includes a wafer polishing assembly having a plurality of wafer carriers for substantially simultaneously polishing a plurality of wafers against a rotating polishing surface. A plurality of wafers to be polished are substantially simultaneously loaded into the plurality of wafer carriers by wafer holding apparatus of an index table. Similarly, a plurality of wafer carriers are substantially simultaneously unloaded into wafer holding apparatus of the index table. The wafer carriers are individually computer controlled for exact polishing and different polishing requirements can be met at the same time by different wafer carriers.
摘要:
A method of machining a workpiece may include continuously rotating the workpiece, continuously rotating a tool having at least one cutting surface, and positioning the tool relative to the workpiece so that the at least one cutting surface engages the workpiece at a first discrete location at a periphery of the workpiece. The method may further include continuing to rotate the workpiece and the tool so that the at least one cutting surface engages a second discrete location at the periphery of the workpiece, and controlling a tool surface velocity VT relative to the workpiece surface velocity VW so that the first and second discrete locations are discontinuous. The tool may make multiple iterative passes over the workpiece to engage subsequent discrete locations, wherein the first discrete location, second discrete location, and multiple subsequent discrete locations may form a machined surface that extends continuously around the workpiece.
摘要:
A wafer polishing apparatus includes a wafer polishing assembly having a plurality of wafer carriers for substantially simultaneously polishing a plurality of wafers against a rotating polishing surface. A plurality of wafers to be polished are substantially simultaneously loaded into the plurality of wafer carriers by wafer holding apparatus of an index table. Similarly, a plurality of wafer carriers are substantially simultaneously unloaded into wafer holding apparatus of the index table. The wafer carriers are individually computer controlled for exact polishing and different polishing requirements can be met at the same time by different wafer carriers.
摘要:
A cam data display device is designed to perform waveform display of a motion of an electronic cam and is provided with a cam-shape data storage unit configured to store cam-shape data in which a phase of a camshaft is associated with a position of a slave axis, a camshaft rotational speed acquisition unit configured to acquire a rotational speed of the camshaft, and a waveform generation unit configured to generate the waveform display indicative of the relationship between time and the motion of the slave axis, based on the cam-shape data and the rotational speed of the camshaft.
摘要:
A method of machining a workpiece may include continuously rotating the workpiece, continuously rotating a tool having at least one cutting surface, and positioning the tool relative to the workpiece so that the at least one cutting surface engages the workpiece at a first discrete location at a periphery of the workpiece. The method may further include continuing to rotate the workpiece and the tool so that the at least one cutting surface engages a second discrete location at the periphery of the workpiece, and controlling a tool surface velocity VT relative to the workpiece surface velocity VW so that the first and second discrete locations are discontinuous. The tool may make multiple iterative passes over the workpiece to engage subsequent discrete locations, wherein the first discrete location, second discrete location, and multiple subsequent discrete locations may form a machined surface that extends continuously around the workpiece.
摘要:
A numerical controller for performing an machining operation by controlling relative position of a workpiece and a tool in synchronism with a rotational position of a rotational axis to which the workpiece or the tool is attached, without causing time delay of position control of the tool relative to the workpiece in varying a rotational velocity of the rotational axis. A rotational position θi(i=0, 1, . . . ) of a workpiece on the rotational axis, a position (Xi, Zi) of the tool relative to the workpiece when the workpiece is at the rotational position θi, and the rotational velocity Vi of the workpiece from the rotational position θi to the rotational position θi+1 are set in advance. Time Ti required for rotating the workpiece from the rotational position θi to the rotational position θi+1 at the rotational velocity Vi is obtained. Velocities Vxi and Vzi of the workpiece are obtained so that the position of the workpiece reaches the next set position (Xi+1, Zi+1) in the time Ti. Servomotors for the spindle, the X-axis and the Z-axis are driven at the set velocity or the calculated velocities to provide relative motions to the workpiece and the tool for the machining operation.
摘要翻译:一种用于通过控制工件和工具的相对位置与工件或工具所附着的旋转轴线的旋转位置同步地进行加工操作的数值控制器,而不会造成工具相对于工具的位置控制的时间延迟 工件改变旋转轴的旋转速度。 在旋转轴上的工件的旋转位置θi(i = 0,1,...),一个位置(X,i,Z, 当工件处于旋转位置θ1时,工件相对于工件的旋转速度V SUB> /从工件的旋转位置θ 预先设定到旋转位置θ1+ 1 + 1 SUB>。 将工件从旋转位置θ1旋转到旋转位置θ1+ 1 +所需的时间T SUB>以旋转速度V i SUB>。 获得工件的速度Vx< i>和V z< i< / i>和/或工件的位置到达下一设定位置(X 1 i + 1, 在时间T i i中,Z i + 1 + 1)。 主轴,X轴和Z轴的伺服电机以设定速度或计算速度驱动,为工件和加工工具提供相对运动。
摘要:
A numerical controller for performing an machining operation by controlling relative position of a workpiece and a tool in synchronism with a rotational position of a rotational axis to which the workpiece or the tool is attached, without causing time delay of position control of the tool relative to the workpiece in varying a rotational velocity of the rotational axis. A rotational position nulli(inull0, 1, . . . ) of a workpiece on the rotational axis, a position (Xi, Zi) of the tool relative to the workpiece when the workpiece is at the rotational position nulli, and the rotational velocity Vi of the workpiece from the rotational position nulli to the rotational position nullinull1 are set in advance. Time Ti required for rotating the workpiece from the rotational position nulli to the rotational position nullinull1 at the rotational velocity Vi is obtained. Velocities Vxi and Vzi of the workpiece are obtained so that the position of the workpiece reaches the next set position (Xinull1, Zinull1) in the time Ti. Servomotors for the spindle, the X-axis and the Z-axis are driven at the set velocity or the calculated velocities to provide relative motions to the workpiece and the tool for the machining operation.
摘要:
Methods and apparatuses for evenly polishing the entire polishing surface of a sample are described. One polishing apparatus of the present invention comprises: a platen having an upper surface upon which the sample surface is to be polished; a sample holder disposed opposite to the platen's upper surface, at least one of the platen and the sample holder being rotated about a first axis to effect polishing; a positioning means for changing the distance between the sample holder and the platen in response to a control signal; and a controller providing said control signal to the positioning means to control the operation of the positioning means during a polishing cycle, wherein the controller causes the positioning means to change the distance intermittently during the polishing cycle. One method according to the present invention comprises: dispensing slurry upon a polishing pad; polishing the sample against the polishing pad; and intermittently changing the distance between the sample and the polishing pad during the polishing step.