| 摘要 |
<p>1486653 Milling or grinding cams A SCHMERMUND 26 Aug 1975 [26 Aug 1974] 35167/75 Heading G3N A milling or grinding machine is used to produce cams e.g. cup or drum cams and radial or disc cams for oscillating driven levers. Tool spindle 29, rotatable about axis 38, carries tool 30 for producing the outer circular profile of the cam body 31 which is clamped on turn-table 40 of a workpiece spindle rotatable about axis 39 by motor 42. A first store 96 holds data relating to the shape (law) of the desired camming surface, i.e. the relation between the displacement magnitude of the driven member and the associated angular position of the cam. A second store 72-76 holds data relating to workpiece - dependent parameters for determining the cam surface dimensional characteristics. A co-ordinator associates related data items from each of the first and second stores to generate a succession of angle information signals defining a circular arc corresponding to one on which the rotation axis of a roller follower of given dimensions would move on following the camming surface. A command signal generator, responsive to the angle signals, applies pairs of co-ordinate displacement signals to move the carriage 44 along the circular arc 35 in a plane perpendicular to the support rotational axis. Turntable 40 is movable on carriage 44 in the X-direction by motor 46 and in the Y direction by motor 50, the motors having respective transmitters 47, 50. The cam shape store can hold these shapes in numerical form i.e. in the form of normalized co-ordinate pairs, or in the form of a mathematical law whereby a calculation for each individual cam is carried out during processing. Drive motor speed is provided from digital store 105 via D/A converter 52 and regulator 54 while X-Y axis motion of support 44 is determined by circle interpolator 100. Commands are received via unit 109.</p> |
