摘要:
A method and a device for grinding the flat end faces of rollers for rolling bearings are described. The rollers, which move along a substantially circular path between two rotary grinding wheels disposed one in front of the other, are carried by a rotating transport member, and rotate about its own axis. Said rollers roll on one or more rolling tracks which are coaxial with the axis of the transport member. The rotation of the rolling tracks and that of the transport member are independent of one another.
摘要:
A damper device for automatic couplings in railway vehicles has elastic and hydraulic parts, the hydraulic part being doubleacting and having two chambers which are interconnected through a variable flow restriction, for example a nozzle formed in part by a shaped axial pin, such that the damping force varies progressively in response to movement applied to the device.
摘要:
A grinding machine has a grinding wheel advancing mechanism having at least two speeds of operation, and a hydrostatic spindle for supporting a workpiece. Detector means are provided for detecting the change in pressure of the support fluid of the hydrostatic spindle when the grinding wheel contacts the workpiece supported on the spindle. Speed changing means are provided, responsive to the output of the detector means, for effecting a change in the speed of the advancing mechanism of the grinding wheel.
摘要:
Rolling bearings are formed by disposing a crown of rolling bodies such as balls in contact with each other between a pair of concentric cylindrical deformable metal tubes, and then deforming the tubes toward each other on axially opposite sides of the balls by simultaneously exerting on the sleeves pressures directed toward the balls, thus utilizing the balls as forming elements for generating rolling tracks for the balls on the races provided by the sleeves. The sleeves are rotated relative to each other during this deformation by contoured forming rollers applied to the inner and outer surfaces of the inner and outer races, respectively.
摘要:
A hydrostatically supported machine tool slide has two spacedapart bilateral cylindrical hydrostatic bearings for longitudinal movement of the slide along a guide shaft fixed to a bed, together with a bilateral flat hydrostatic bearing acting on a member of the bed to prevent rotation of the slide about the axis of the cylindrical bearing, affording a three-point isostatic support.
摘要:
A device for evaluating the vibrations of a revolving member comprises a detecting head for detecting the vibrations and their amplitude, an integrating circuit actuated by a monostable multivibrator that generates a pulse in correspondence with each detected vibrations, and an amplitude discriminating circuit whose threshold value is such as to emit a signal only when a signal received thereby from the integrating circuit has an amplitude corresponding to the sum of a plurality of those pulses.