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Unova UK Limited Patents
Assignee:
Unova UK Limited
Address:
Buckinghamshire, GB
No. of patents:
25
Patents:












Patent Number Title Of Patent Date Issued
6991519 Angle head grinding method January 31, 2006
A computer controlled grinding machine grinds a cylindrical region and an annular shoulder of a rotatable workpiece. Relative movement is effected between the workpiece and a grinding wheel along a line of action which subtends an angle of approach of less than 90 degrees to the Z axis o
6893324 Angle head grinding apparatus May 17, 2005
A computer controlled grinding machine grinds a cylindrical region and an annular shoulder of a rotatable workpiece. Relative movement is effected between the workpiece and a grinding wheel along a line of action which subtends an angle of approach of less than 90 degrees to the Z axis o
6887128 Method of reducing thermal distortion in grinding machines May 3, 2005
The invention provides a method of reducing thermal distortion in grinding machines. Such machines each comprise a machine base (60) and a grinding wheel (50) for grinding components in the machine (10). The method includes the steps of: (a) sensing a first temperature at an upper surfac
6881130 Edge grinding April 19, 2005
A method of positioning a grooved grinding wheel relative to a disc-like circular workpiece for edge grinding the workpiece using the groove in the wheel includes the steps of mounting the workpiece for rotation about a first axis, mounting the grinding wheel for rotation about a second
6811465 Workpiece grinding method which achieves a constant stock removal rate November 2, 2004
In a method of grinding a component such as a cam, a reduction in the finish grinding time is achieved by rotating the component through only a single revolution during a final grinding step and controlling the depth of cut and the component speed of rotation during that single revolutio
6767273 Crankpin grinding method July 27, 2004
A method is described for grinding a crankpin of a crankshaft using computer controlled wheelfeed and headstock drives (44,30,24). During a final grinding step leading to finish size the cutting force is maintained on the wheelhead (38) to keep the wheel (34) and pin under a moderate
6733364 Computer controlled grinding machine May 11, 2004
A computer controlled grinding machine programmed so as to control the machine by calculating the wellhead demand positions which takes into account the difference in height between the workpiece axis of rotation and the grinding wheel axis of rotation to produce a height adjusted value
6485353 Apparatus and method for grinding composite workpieces November 26, 2002
A grinding machine has a wheelhead movable tinder computer control perpendicular to the axis of a composite workpiece, mounted between a headstock and a tailstock, and workrests slidable along front and rear rails. Between the workrests are sandwiched rigid cover-spacers to protect t
6461228 Grinding and polishing machines October 8, 2002
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 be
6443818 Grinding machine September 3, 2002
A grinding machine, in particular a face grinder for grinding the faces of silicon wafers, has a grinding wheel spindle (20) and a work spindle (22) which are mounted so as to be pivotal about axes (A and B) respectively, each axis being perpendicular to the rotational axis of its respec
6428397 Wafer edge polishing method and apparatus August 6, 2002
A semi-conductor wafer (12) has its inclined edge flanks polished by a grooved wheel (16) of synthetic plastics material, while a jet (20) of polishing slurry, which may comprise colloidal silica, is fed downwards into the zone of contact between the wheel and the wafer. The wheel (16)
6319097 Grinding methods and apparatus November 20, 2001
The time to grind a workpiece can be reduced by selecting a grinding wheel whose width is not substantially greater than wheel strength considerations require, and which may therefore be less than the axial length of the region to be ground providing a work rest or work steady to inc
6306018 Grinding methods and apparatus October 23, 2001
The time to grind a workpiece can be reduced by selecting a grinding wheel whose width is not substantially greater than wheel strength considerations require, and which may therefore be less than the axial length fo the region to be ground providing a work rest or work steady to inc
6298278 System for monitoring workpiece and tool carriages movement using a two-axis scale attached to a October 2, 2001
A machine tool has a carriage, has a workpiece carriage for carrying a workpiece from which material is removed by a tool carried by a tool carriage. A two-axis scale is attached to one of the carriages, and cooperates with a reading head attached to the other carriage. The output fr
6277002 Grinding machine spindle August 21, 2001
A machine tool, particularly for grinding workpieces, has a single rotatable spindle (2) carrying a fixed cup-shaped inner grinding wheel (8) and an axially slidable cup-shaped outer grinding wheel (22). A T-shaped annular piston (14) engages in a recess with the spindle to form front an
6267647 Grinding machines and polishing machines July 31, 2001
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 be
6259054 Method of fitting a valve seating ring and an apparatus therefor July 10, 2001
A welding machine for weld bonding a valve seating ring in an annular recess of a cylinder head (20) includes 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 electrode tool is moved
6224459 Workpiece inspection and handling May 1, 2001
A workpiece alignment and shifting system for moving circular workpieces from a first inspection station to a second machining station, comprises workpiece holding means for attachment to the face of a disc workpiece to move the latter from one position to another. Robotic means controls
6220938 Grinding machines April 24, 2001
A grinding pin (53) for notch grinding is provided. The grinding pin comprises a cylindrical region of formable grinding material and in which is formed a groove (18) for forming a notch. The length of the cylindrical region is such that further grooves (20) can be formed therein as each
6149503 Method and apparatus for supporting a crankshaft in a grinding machine for grinding the crankpin November 21, 2000
A method of supporting a workpiece having journal and eccentric regions, in a grinding machine for grinding the eccentric regions thereof, is described which involves mounting the workpiece in a headstock of the grinding machine, providing a coupling between the workpiece and a rotary
6113087 Work holding apparatus September 5, 2000
A workpiece clamp comprising an upstanding pillar (30, 32) having two relatively movable workpiece engaging jaws (34, 36, 42, 44) extending from, and carried by the upper end of the pillar. A drive (74) for effecting the movement of the jaws is located remote from the pillar and thru
6095897 Grinding and polishing machines August 1, 2000
A grinding machine for grinding the edge of a disc or wafer comprises a grooved grinding wheel 308, means for transporting the wafers before or after grinding, and a housing 332 in which wafers 340 are parked on a vacuum chuck 336 awaiting inspection. A jet 338 protrudes into the housing
6038489 Machine tools March 14, 2000
In a machine tool, a component such as a grinding wheel acts on a workpiece 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
5996431 Twist action friction drive December 7, 1999
A twist action roller friction drive comprises a rotating drive bar which drives in rotation a roller the axis of rotation of which is inclined relative to the axis of a rotationally fixed driven member with which the roller engages. The inclined roller comprises a single annular roller
5891255 Swarf removal April 6, 1999
Methods and apparatus for removing swarf from machined components are described, in which a component is mounted on support means and the latter is vibrated in a manner to cause the component to be accelerated alternately in one direction and then the other, for a period of time. The

 
 
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