摘要:
A machine for grinding threads on a workpiece which is rotated in a workhead while the workhead is reciprocated by a table under a grinding wheel to form threads in the workpiece. To improve the accuracy with which the threads are formed, the workpiece and a grinding wheel dresser contact the grinding wheel on the same side of the wheel at points which are symmetrical to and on opposite sides of the centerline of the wheel which extends parallel to the path along which the wheel is fed into the workpiece. If a fluted workpiece is being ground to produce a tap, the threads may be relieved in accordance with either the United States or European convention.
摘要:
A grinding wheel dresser with a diamond-tipped dressing tool carried by a pivotally mounted arm driven by a fluid-actuated drive to sweep the diamond tip across the working surface of a grinding wheel. The arm and fluid-actuated drive are carried by an arbor mounted for rotation in a housing and having a knob secured thereto so that the arbor can be manually rotated to angularly orient the path of the diamond tip with respect to the working face of the grinding wheel to permit the dressing of work surfaces with differing contours and inclinations to the axis of rotation of the wheel.
摘要:
A profiler for moving a dresser into and across a rotating grinding wheel to form or dress a predetermined configuration in the grinding wheel for use in grinding workpieces. The dresser is moved along two axes at a right angle to each other by lead screws connected to slides and driven by servomotors. The servomotors are actuated and controlled to move the dresser along a desired path by a computer control unit with appropriate software and programming to produce or dress a predetermined configuration in the rotating grinding wheel. To prevent contaminants from destroying the drive mechanism and the ways for the slides, they are completely enclosed while still permitting easy assembly and disassembly of the computer parts of the profiler.
摘要:
A mechanism for moving a plurality of workpieces toward a work station of a machine tool, loading workpieces into the machine tool, and removing processed workpieces therefrom in which the mechanism for indexing, raising and lowering a walking beam is carried by a slide for extending the walking beam into and removing it from the work station of the machine tool. The processed workpieces withdrawn from the machine tool are removed from the walking beam by a pusher mechanism.
摘要:
An automatic clearance grinding machine for helically fluted drills wherein a pair of opposed grinding wheels are arranged to simultaneously grind opposed lands of the drill. One grinding wheel is mounted with its rotational axis spaced above the drill axis by a vertical distance substantially equal to one-half the vertical distance between the drill axis and a pivoted diamond point used for dressing the wheel. The other grinding wheel is mounted with its rotational axis spaced below the drill axis by a distance substantially equal to one-half the vertical distance between the drill axis and a second pivoted diamond point used to dress the other wheel. Both diamond dressers are mounted at a location fixed relative to the drill axis. The two grinding wheels are mounted on respective horizontal slides. During a dressing operation, the slides move the grinding wheel axes along respective horizontal paths located substantially midway between the drill axis and the dresser associated with the respective wheel.
摘要:
A machine for grinding threads on a workpiece which is rotated in a workhead while the workhead is reciprocated by a table under a grinding wheel to form threads in the workpiece. To improve the accuracy with which the threads are formed, the workpiece and a grinding wheel dresser contact the grinding wheel on the same side of the wheel at points which are symmetrical to and on opposite sides of the centerline of the wheel which extends parallel to the path along which the wheel is fed into the workpiece. If a fluted workpiece is being ground to produce a tap, the threads may be relieved in accordance with either the United States or European convention.
摘要:
A mechanism for programming the number of increments of feed of a grinding wheel into a workpiece and the extent of the feed of each increment. The mechanism has a cam and a follower operably associated with a grinding wheel to feed the wheel toward a workpiece in response to rotation of the cam. A motor drives the cam and a dial in synchronization with the cam which has a plurality of dogs thereon which actuate limit switches to stop the motor and hence the feeding of the wheel into the workpiece. The number of increments in which the wheel is fed into the workpiece is a function of the number of dogs placed on the dial and the extent of the feed of each increment is a function of the angular position of the dogs on the dial.
摘要:
A workpiece transfer mechanism having a walking beam carried by a slide mounted for reciprocal movement on a bed or table. A particular bell crank linkage is provided so that a single hydraulic cylinder both raises and lowers the walking beam with respect to the slide and also moves the slide longitudinally with respect to the table. The table is carried by a second slide for reciprocation of the table by a second hydraulic cylinder.
摘要:
A transfer mechanism for transferring a round part such as a drill from a first station to a second station with intermediate accumulating storage wherein a horizontally reciprocating slide has a pair of horizontally displaced transverse V-shaped grooves. With the slide extended, one of the grooves receives a part from the first station while the second groove receives a part from the storage hopper. When the slide is retracted, the part in the second groove is transferred to the second station and the part in the first groove is transferred to the hopper. Pivoted gate fingers at the hopper move the part from the first groove into the hopper when the slide is again extended. By using only one groove in the slide, the transfer mechanism can be used for an unloading operation only, that is, transferring a part from a machining station to the hopper.