Class 451/228 - Noncircular cross section

Subclass of Class 451 - Abrading
Definition: Abrading machine in which the workpiece has a noncircular
No. of patents: 29
Last issue date: 02/14/2006

Number	Title	Issue Date
6999844	Numerical controller 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 posit...	02/14/2006
6685536	Method for grinding convex running faces and outside diameters on shaft-like workpieces in one set-up and grinding machine for carrying out the method The invention relates to a method for grinding convex running surfaces and exact outside diameters on undulated workpieces. In a clamping, a first convex running surface is ground on a discoid partial section of an undulated workpiece during a first grind...	02/03/2004
6488575	Polishing pads and planarizing machines for mechanical or chemical-mechanical planarization of microelectronic-device substrate assemblies, and methods for making and using such pads and machines Polishing pads used in the manufacturing of microelectronic devices, and apparatuses and methods for making and using such polishing pads. In one aspect of the invention, a polishing pad for planarizing microelectronic-device substrate assemblies has a ba...	12/03/2002
5813900	Grinding machine for grinding cylindrical workpieces A grinding machine includes a rotating grinding wheel and workpiece moving apparatus operable to move a workpiece towards and away from the wheel. The apparatus is arranged to move a workpiece support arcuately about an axis to move a workpiece towards or...	09/29/1998
5746643	Method of grinding and machining non-circular workpiece and apparatus for the same The present invention achieves machining operation without grind-burning and grinding crack and improves the profile accuracy of a workpiece, by automatically generating X/C axis data that controls the headstock and the wheel spindle head while taking int...	05/05/1998
5289660	Method and apparatus for grinding non-circular workpiece When a non-circular workpiece is to be machined by an NC cylindrical grinding machine, the latter is controlled such that the velocity of each of the main spindle and grinding head does not exceed a threshold allowable by the machine. A non-circle data pr...	03/01/1994
4908991	Grinding machines The machine for grinding ophthalmic glasses comprises a housing (1) open in its upper part and housing a grinding wheel (7) driven in rotation on a first horizontal shaft (6), a U-shaped carriage (13) pivotally mounted on a second horizontal shaft (11) an...	03/20/1990
4884373	Numerically controlled machine tool A numerically controlled machine tool for machining a non-circular workpiece according to profile data. The numerical controller of the machine tool memorizes the ideal profile data calculated from the ideal final shape of the workpiece, and the execution...	12/05/1989
4873793	Numerically controlled machine tool A numerically controlled machine tool for machining a non-circular workpiece according to profile data. The servomotor drive unit of the machine tool includes a frequency voltage converter which outputs a velocity compensation signal proportional to the f...	10/17/1989
4870784	Lens edging machine and method A machine for grinding the peripheries of ophthalmic lenses to predetermined outlines is characterized by a head having a rotatable workholder for moving an edge of a lens against a rough grinding or finishing wheel and a pattern holder positioned vertica...	10/03/1989
4837978	Machine for grinding the edges of lenses A machine for grinding the edges of a lens via a set of different grinding wheels for rough and finish grinding of the lens. The machine includes a machine housing, a holding element mounted in the housing for holding either the lens or the set of grindin...	06/13/1989
4813188	Method of shaping workpieces especially forming undercut archimedean spirals Hitherto mechanical lever systems and cams were used to effect the necessary relative movements between the workpiece and the grinding disc. In order to attain a higher production rate at improved quality, it is proposed to use electronic means for shapin...	03/21/1989
4756124	Machine for grinding the edges of a sheet of glass, particularly for automobile windows A machine for grinding the edge of sheets of plate glass of the type free from copying cam and controlled by an electronic system and including a grind wheel carried by a wheel arm supported on a carriage moving along a rectilinear path, is provided with ...	07/12/1988
4651599	Method for producing workpieces having polygonal outer and/or inner contours Process for fabricating work-pieces with polygonal inner and/or outer profile, preferably by removal machining, wherein the work-piece pivots about a fixed axis (4) at constant speed while the tool (5) defines a closed loop path, wherein the rotation spee...	03/24/1987
4648295	Method for producing workpieces having polygonal outer and/or inner contours and apparatus for implementing the method Method for producing workpieces having polygonal outer and/or inner contours, preferably by machining, wherein the workpiece to be machined rotates at a constant speed about a stationary axis, while the tool is guided on a closed, curved path, with the ra...	03/10/1987
4587767	Apparatus for grinding An arrangement for relief grinding and polygonal grinding on a grinding machine has a device for moving the workpiece spindle and workpiece towards the grinding disk linearly of the pivotable operating lever....	05/13/1986
4528780	Process and apparatus for the control of position of a tool of an edge-processing machine for glass panes A process and apparatus for the control of the path of the grinding tool of an all-around edge grinding machine supporting a glass pane for movement about a rotational axis. The grinding tool is positively guided into contact with the edge of the glass pa...	07/16/1985
4525958	Method of controlling article speed during edge grinding An edge grinder includes a shaft for supporting a glass sheet template in spaced relationship to one another. The template and glass sheet are rotated about a sheet axis of rotation and a grinding wheel is rotated about a wheel axis of rotation. The grind...	07/02/1985
4501093	Profile machining apparatus The disclosure relates to a profile forming apparatus and in particular a cam grinding machine in which a cam to be ground is mounted for rotation about the axis of the cam shaft in a work-table and a drive motor rotates the cam about its axis at a speed ...	02/26/1985
4443976	Cylindrical grinding machine A cylindrical grinder for effecting stock removal from a cam surface on a workpiece, the cam surface including a base portion, a nose portion and flank portion joining the base and nose portions, the nose portion having a smaller radius of curvature than ...	04/24/1984
4400781	Numerical controller for cam grinding machine A numerical controller for a cam grinding machine, which has a cam drive unit and a grinding wheel drive unit, includes a memory for storing profile data of a cam corresponding to angular positions thereof. A data processor is provided for reading out the...	08/23/1983
4330966	Groove grinding fixture A grinding fixture provides for grinding a pair of oppositely positioned complementary ball engaging meridian race grooves in the external surface of the inner race member of a constant velocity universal joint, wherein the race grooves are characterized ...	05/25/1982
4262454	Workpiece rotational speed controller for cam grinding machine A workpiece rotational speed controller having a pulse counter responsive to a pulse signal generated from a pulse generator for indicating the actual angular position of a cam shaft during grinding on a cam grinding machine and a comparator for comparing...	04/21/1981
4214309	Numerical controller for controlling machining of oval workpiece A numerical controller having a memory device for storing a profiling program composed of a series of data blocks, each of which designates an incremental rotational amount of an oval workpiece and an incremental feed amount of a tool slide, and a digital...	07/22/1980
4210039	Apparatus for forming non-circular workpieces An apparatus for forming non-circular workpieces including a rotatable workpiece carrying element which is laterally displaceable as it rotates to form the desired non-circular workpiece profile. The workpiece carrying element has three cam surfaces at le...	07/01/1980
4136390	Grinding control system for forming non-circular punching tools Grinding apparatus and control system for forming non-circular punching tools comprising a grinding wheel having a cylindrical grinding surface, a rotary table with its axis parallel to the grinding wheel axis and carrying orthogonally movable slides such...	01/23/1979
4036107	Workpiece orientation column and process A vertical orientation column capable of orienting or positioning a large workpiece, such as a marine propeller, with respect to four or five axes and a process for machining large and complex workpieces. The column is so constructed as to allow quick ins...	07/19/1977
4004377	Machine for forming a locator pin A machine for forming the head end portion of a locator pin has a base rigidly mountable. A housing is transversely movably mounted on the base. A pin mounting is on the housing. The machine in use rotates the pin mount simultaneously with moving the hous...	01/25/1977
3994099	Screw thread tap grinding Apparatus for screw thread tap grinding is provided in which the tap workpiece is oscillated laterally relative to the thread grinding wheel in order to impart relief to the ground thread form of the tap workpiece. The apparatus consists of base structure...	11/30/1976

PatentStorm

Quotables

PatentStorm News

Class 451/228 - Noncircular cross section