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1. 发明公开

EP1578562A1 GRINDING WHEEL MONITORING 有权
标题翻译：磨轮监测
公开(公告)号：EP1578562A1
公开(公告)日：2005-09-28
申请号：EP03789557.0
申请日：2003-12-22
申请人： Unova U.K. Limited
发明人： MAVRO-MICHAELIS, Daniel, Andrew
IPC分类号： B24B49/10 , B24B49/16
CPC分类号： B24B49/16
摘要： A method of monitoring the wear of a grinding wheel (10) comprises the steps of measuring the force exerted between the wheel and a workpiece (26), measured normal to the grinding face of the wheel at the point of contact between the wheel and workpiece, and generating a warning signal when the measured force exceeds a predetermined threshold value. A signal indicative of the normal grinding force is obtained by measuring the force exerted by a wheelfeed drive (18) which in use urges the wheel into grinding engagement with the workpiece. Where the wheelfeed drive includes an electrically powered motor, the torque developed by the motor will be proportional to the normal force between the wheel and workpiece. This in turn is proportional to the electrical power drawn by the motor during operation, so an indication of the force between wheel and workpiece is obtained by measuring the power demand made by the motor on its power supply. The value of the force proportional signal obtained while grinding a workpiece is compared with a corresponding value obtained during the grinding of a preceding similar workpiece, and a warning signal is generated if a current grinding force signal value differs from a preceding grinding force signal value by more than a predetermined amount. Mean force values may be computed during each of a succession of workpiece grinds on similar components and the value for a current workpiece can be compared with the mean value for a plurality of preceding workpiece grinds. Alternatively the peak value of the normal grinding force signal value during a current grind may be compared with a predetermined value to generate a warning signal.
摘要翻译：监测磨轮（10）的磨损的方法包括以下步骤：测量在车轮和工件（26）之间的接触点处垂直于车轮的磨削面测量的施加在车轮和工件（26）之间的力并且当所测量的力超过预定阈值时产生警告信号。指示正常磨削力的信号通过测量由轮胎供给驱动器（18）施加的力来获得，所述轮胎供给驱动器在使用中促使轮与工件磨削接合。在车轮驱动装置包括电动马达的情况下，马达产生的转矩将与车轮和工件之间的法向力成比例。这反过来又与电机在运行过程中的功率成正比，因此通过测量电机在其电源上的功率需求来获得轮与工件之间的力的指示。将磨削工件时得到的力比例信号的值与磨削前一类似工件时获得的相应值进行比较，如果当前磨削力信号值与先前磨削力信号值不同，则产生警告信号超过预定量。平均力值可以在类似部件上的一系列工件磨削的每一个过程中计算，并且可以将当前工件的值与多个在先工件磨削的平均值进行比较。或者，可以将当前研磨期间的正常研磨力信号值的峰值与预定值进行比较以生成警告信号。

2. 发明授权

EP1180414B1 Grinding machine 失效
公开(公告)号：EP1180414B1
公开(公告)日：2005-03-16
申请号：EP01110723.2
申请日：1997-07-23
申请人： Unova U.K. Limited
发明人： Coverdale Stephen Roger , Laycock Michael
IPC分类号： B24B1/00 , B24B5/42 , B24B5/04
CPC分类号： B24B5/04 , B24B1/00 , B24B5/01 , B24B5/42 , B24B17/10 , B24B27/0076 , B24B51/00 , Y10S451/913

3. 发明授权

EP1224059B1 GRINDING MACHINE WITH TWO GRINDING WHEELS 有权
标题翻译：研磨装置有两个轮子
公开(公告)号：EP1224059B1
公开(公告)日：2003-05-02
申请号：EP00969715.2
申请日：2000-10-26
申请人： Unova U.K. Limited
发明人： LAYCOCK, Michael
IPC分类号： B24B5/42 , B24B19/12 , B24B27/00 , B24B51/00
CPC分类号： B24B49/00 , B24B1/00 , B24B5/42 , B24B19/125 , B24B27/0076 , B24B49/16
摘要： A grinding machine is disclosed comprising a main frame, a wheelhead, a worktable (16), a headstock (12) and tailstock (14) carried by the worktable (16). A computer is supplied with data indicative of at least one operational parameter of the grinding proces, and the wheelfeed is under the control of signals generated by the computer. Two small diameter grinding wheels (22, 24) are mounted on two parallel spindels mounted on a support member (32) and are independently driven by two motors (28, 30) mounted at the other ends of the spindles. The support member (32) is pivotally joined to the wheelhead. The headstock (12) includes a workpiece drive (20) for rotating the workpiece during a grinding, and its speed of rotation is also controlled by signals generated by the computer. The length of the spindles positions each of the motors (28, 30) axially clear of the tailstock assembly when the wheels (22, 24) are aligned to engaged regions of a workpiece nearest to the headstock (22).

4. 发明公开

EP1251996A1 GRINDING PIN FOR GRINDING MACHINES COMPRISING RESIN BONDED SECTIONS OF ROUGH GRIT AND FINE GRIT 有权
标题翻译：磨削主轴与第WAY树脂粘结粗，细五谷精磨
公开(公告)号：EP1251996A1
公开(公告)日：2002-10-30
申请号：EP01900196.5
申请日：2001-01-10
申请人： Unova U.K. Limited
发明人： STOCKER, Mark, Andrew
IPC分类号： B24B9/06 , B24D5/14
CPC分类号： B24D5/14 , B23Q2210/002 , B24B9/065
摘要： A grinding pin (53) for grinding notches in the edges of disc workpieces, such as semi-conductor wafers, comprises a metal spindle (132) for mounting in a grinding machine, and an adjoining cylindrical region having axially spaced sections of fine grit (160) and rough grit (162), the latter being axially nearer the spindle (132). In use on a grinding machine having a rotatable forming wheel, similar profiled notch-grinding grooves (140) and (142) are formed by the wheel in the grinding sections (162) and (160) respectively.

5. 发明公开

EP1200228A1 IMPROVEMENT IN AND RELATING TO EDGE GRINDING 有权
标题翻译：边缘打磨工艺
公开(公告)号：EP1200228A1
公开(公告)日：2002-05-02
申请号：EP00920921.4
申请日：2000-04-20
申请人： Unova U.K. Limited
发明人： STOCKER, Mark, Andrew
IPC分类号： B24B1/00
CPC分类号： B24B1/00 , B23H1/04 , B23H9/00 , B24B9/065 , B24B47/22 , B24B49/04 , B24B53/065 , B25J9/1602 , H01L21/304
摘要： A disc-like workpiece (10), such as a semi-conductor wafer, is positioned relative to a grooved grinding wheel (32) by the steps of rotating the workpiece and wheel about respective parallel axes, performing a preliminary grind, measuring the profile of the workpiece rim, axially adjusting the wheel position, performing a second preliminary grind and repeating the steps until the desired accuracy of the profile is achieved. A method and apparatus is also described for forming the edge of a forming wheel, for example using electro-discharge machining.

6. 发明授权

EP0950214B1 METHOD OF CONTROLLING A MACHINE TOOL 失效
标题翻译：一种用于控制机床
公开(公告)号：EP0950214B1
公开(公告)日：2002-04-24
申请号：EP97913297.4
申请日：1997-11-19
申请人： Unova U.K. Limited
发明人： PICKLES, John, David , GRIFFITHS, Selwyn, Jonathan
IPC分类号： G05B19/18
CPC分类号： G05B19/18 , B24B5/42
摘要： In a machine tool, a component such as a grinding wheel (4) acts on a workpiece (2) to form the latter into a circularly asymmetric shape, for example, a crankpin. Movement of the grinding wheel is controlled by a control signal which is derived from theoretical relative positions and positional velocities of the grinding wheel relative to the workpiece. In a correction cycle, the respective positions of the grinding wheel relative to the workpiece are measured for each of a succession of angular positions of the workpiece. The measured positions are compared with corresponding theoretical positions and data indicative of any differences are stored, and then used to modify the control signal during a subsequent revolution of the workpiece, so as to compensate for any of said differences and thereby reduce the magnitude of any error which would have resulted from the measured positional differences. While the correction cycle occurs, the grinding wheel does not make contact with the workpiece.

7. 发明公开

EP1005956A3 Grinding machine spindle flexibly attached to platform 失效
标题翻译：磨床主轴的柔性连接到平台
公开(公告)号：EP1005956A3
公开(公告)日：2001-12-12
申请号：EP00102837.2
申请日：1997-06-11
申请人： Unova U.K. Limited
发明人： Stocker, Mark Andrew , Falkner, Dermot Robert , Morantz, Paul Martin Howard , Pierse, Michael George
IPC分类号： B24B41/04 , B23Q1/36 , B24B9/06 , B24B53/07
CPC分类号： B24B53/07 , B23Q3/186 , B23Q17/24 , B24B5/04 , B24B5/06 , B24B5/065 , B24B9/065 , B24B17/04 , B24B17/06 , B24B41/02 , B24B41/04 , B24B49/02 , B24B49/12 , H01L21/02013 , H01L21/02021 , H01L21/67242 , H01L22/12 , H01L2924/0002 , H01L2924/00
摘要： A grinding or polishing machine comprises a rigid platform on which a workhead spindle and a grinding wheel spindle are located. The grinding wheel spindle is mounted on a sub-assembly which is attached to the platform by means of flexures which permit limited movement of the sub-assembly in a direction generally parallel to the direction in which the wheel has to advance to achieve grinding or polishing of a workpiece mounted on the workhead spindle. The flexures generally inhibit movement of the sub-assembly in all other directions. Two grinding wheels are mounted on the platform, one on each of two sub-assemblies, and each sub-assembly is attached to the platform by flexures as aforesaid. The flexure mounting points are located generally centrally of the machine and are located on either side of and close to the machine centre line. In a grinding or polishing machine having workpiece spindle means, tool spindle means mounted on sub-assemblies which permit limited relative movement in one direction to effect tool and workpiece engagement cam drive means is provided whereby each sub-assembly is movable to advance or retract each tool spindle towards and away from the workhead spindle.

8. 发明授权

EP0896552B1 IMPROVEMENTS IN AND RELATING TO GRINDING MACHINES 有权
标题翻译：改进/以及与磨削
公开(公告)号：EP0896552B1
公开(公告)日：2001-09-26
申请号：EP97927269.7
申请日：1997-06-18
申请人： Unova U.K. Limited
发明人： LAYCOCK, Michael
IPC分类号： B24B19/12 , B24B27/00 , B24B41/04
CPC分类号： B24B19/12 , B24B27/0076 , B24B27/0084
摘要： A grinding machine in which a first grinding wheel (12) is mounted on a wheelhead (20) adapted to be moved towards and away from a workpiece (10) for grinding same is provided, where a second grinding wheel (14) is mounted at one end of an arm (22), the other end of which is pivotally mounted to the wheelhead (20) about an axis parallel to the axis of rotation of the first grinding wheel (12), in which the first grinding wheel (12) is larger than the second grinding wheel (14), and means is provided for pivoting the arm from an upper parked position into a lower grinding position in which the second grinding wheel (14) engages a peripheral surface of the workpiece. Arms of different lengths allow variation in positioning of the second wheel relative to the workpiece and first wheel.

9. 发明授权

EP1007824B1 METHOD OF FITTING A VALVE SEATING RING AND AN APPARATUS THEREFOR 失效
标题翻译：方法安装一个阀门的密封环和装置OUT输送
公开(公告)号：EP1007824B1
公开(公告)日：2001-07-11
申请号：EP97944003.9
申请日：1997-10-03
申请人： Unova U.K. Limited
发明人： BROADHEAD, Philip
IPC分类号： F01L3/22
CPC分类号： B23K11/02 , Y10T29/49306
摘要： The invention concerns a method and a machine for weld-bonding a valve seating ring (34) in an annular recess (30) of a cylinder head (20). The machine comprises an electrode tool (14) on which the ring is located and an overhead support (18, 40, 44, 46) for mounting the cylinder head above the tool. In use the tool is moved upwards into the recess while a welding current is passed across the cylinder head and the tool, whereby the ring is weld-bonded into the recess, without process spatter entering the cylinder head. There may be two separate tools (14, 16) which operate simultaneously on respective recesses (30 or 32) although the weld current may be applied sequentially.

10. 发明公开

EP1048403A2 Improvements in and relating to grinding machines 失效
标题翻译：改进/或与研磨器连接
公开(公告)号：EP1048403A2
公开(公告)日：2000-11-02
申请号：EP00114816.2
申请日：1997-06-11
申请人： Unova U.K. Limited
发明人： Stocker, Mark Andrew , Falkner, Dermot Robert , Morantz, Paul Martin Howard , Pierse, Michael George
IPC分类号： B24B9/06 , B24B53/07
CPC分类号： B24B53/07 , B23Q3/186 , B23Q17/24 , B24B5/04 , B24B5/06 , B24B5/065 , B24B9/065 , B24B17/04 , B24B17/06 , B24B41/02 , B24B41/04 , B24B49/02 , B24B49/12 , H01L21/02013 , H01L21/02021 , H01L21/67242 , H01L22/12 , H01L2924/0002 , H01L2924/00
摘要： A method of grinding the edge of a disc uses a grinding machine having mounted thereon a grooved grinding wheel, in which the groove is formed in situ using a forming wheel also mounted on the grinding machine. After a workpiece has been ground or after a succession of workpieces have been ground, re-engaging the grinding wheel and the forming wheel with the grinding wheel remaining in situ, to re-form the groove in the grinding wheel to correct for wear. A grinding machine comprises a grinding wheel, drive means therefor, a workhead and workpiece spindle and drive means therefor, a forming wheel and drive means therefor, means for moving the grinding wheel so as to plunge grind the edge of the grinding wheel to form a groove therein of precise cross-section and means for effecting relative movement between the grinding wheel and the forming wheel to enable the grinding wheel to engage with the edge of a circular workpiece component mounted on the workpiece spindle to edge grind the component and wherein the forming wheel is also mounted on the workpiece spindle for rotation therewith, and the grinding wheel is a resin bonded wheel.

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