Abstract: The present invention provides a multiple station tooling machine for the production of spirally grooved products and includes a base plate, a plurality of work stations distributed around the base plate and operable to effect selected tooling operations on work pieces, a support stand coupled to the base plate and supporting a support plate, and a turntable disposed above the support plate, the turntable being iteratively angularly movable. The multiple station tooling machine also includes a plurality of workpiece retaining elements and an actuating assembly including drive motors mounted on the support plate for moving the workpiece retaining elements to and between selected orientations. A plurality of generally vertical shafts each has a respective workpiece retaining element secured to one end thereof.

Abstract: A machine tool is provided, especially a multiple station grinding machine for the production of drill bits and similar elongate workpieces, which has at least one axially displaceable and rotatable workpiece holder which has its axial displacement and rotation drive in a sealed-off housing, at least one working tool arranged in a sealed-off working space, a sealing separation wall between the housing and the working space, at least one guide conduit arranged in sealing relationship in the separation wall for receipt of the workpiece holder, and guide elements for the workpiece disposed at the end of the guide conduit which extends into the working space.

Abstract: A drill bit for drilling a hole of a selected diameter in a wood workpiece includes a conically shaped tip having a main cutting portion and a thread series operable to threadingly draw the drill bit into the wood workpiece. The thread series has a diameter which progressively increases in a direction opposite to the drilling penetration direction of movement of the drill bit to a maximum diameter which is the same as the selected diameter of the hole to be drilled. The drill bit also includes a cylindrical portion extending from the conically shaped tip, a spiral screw shaped splinter groove for conducting splinters in the drilled hole away from the drill bit penetration area and a centering drill portion with a self cutting thread series.

Abstract: A machine tool is provided, especially a multiple station grinding machine for the production of drill bits and similar elongate workpieces, which has at least one axially displaceable and rotatable workpiece holder which has its axial displacement and rotation drive in a sealed-off housing, at least one working tool arranged in a sealed-off working space, a sealing separation wall between the housing and the working space, at least one guide conduit arranged in sealing relationship in the separation wall for receipt of the workpiece holder, and guide elements for the workpiece disposed at the end of the guide conduit which extends into the working space.

Abstract: A drill bit for drilling a hole of a selected diameter in a wood workpiece includes a conically shaped tip having a main cutting portion and a thread series operable to threadingly draw the drill bit into the wood workpiece. The thread series has a diameter which progressively increases in a direction opposite to the drilling penetration direction of movement of the drill bit to a maximum diameter which is the same as the selected diameter of the hole to be drilled. The drill bit also includes a cylindrical portion extending from the conically shaped tip, a spiral screw shaped splinter groove for conducting splinters in the drilled hole away from the drill bit penetration area and a centering drill portion with a self cutting thread series.

Abstract: A tool grinding machine has a moveable tool receiving member and a support rotatable about a vertical axis. The support includes a solid disk having a great mass allowing a vibration-free grinding at great output. Grinding spindles are arranged vertically on the disk for grinding a tool received in the tool receiving member. The grinding spindles have a vertical extension above the disk. The disk has a vertical thickness matching at least the vertical length of the grinding spindles.

Abstract: A grinding machine has a machine frame and a grinding spindle support positioned on the machine frame. At least one grinding spindle is arranged with upwardly slanted axis at the grinding spindle support. A grinding wheel is connected to the grinding spindle. A workpiece holder is connected to the machine frame so as to extend parallel to the axis of the grinding spindle. The workpiece holder is displaceable in the axial direction of the grinding spindle and perpendicular to the axial direction of the grinding spindle. A housing is positioned at a slant parallel to the axis of the grinding spindle and encloses the workpiece holder and the grinding wheel. The housing has an outlet opening for a cooling liquid at the lowermost point of the housing. Drive devices for effecting a linear movement of the workpiece holder and a rotational movement of the grinding wheel and the workpiece are positioned exterior to the housing.

Abstract: An improved method and apparatus for polishing turbine blades is disclosed wherein the path of a sanding shoe with respect to the turbine blade is controlled as the turbine blade is rotated on a spindle. The method involves plotting the profiles of the turbine blade in a number of planes, defining the profiles as a series of circle segments each having a center and an angular length, choosing an arbitrary center of rotation of the turbine blade, measuring the distances from the center of rotation to each of the circle segment centers, plotting the hypothetical path of the center of rotation about each circle segment center by each corresponding angular length, and using the derived path of the center of rotation to control the movement of the shoe in a vertical direction and the turbine blade in a horizontal direction as the turbine blade rotates.

Abstract: An improved grinding wheel support arrangement in a grinding machine. The support arrangement includes a support table on which a first post is threadably mounted in a direction normal to the support table. A pair of second posts is fixedly mounted on the support table at a predetermined distance from the first post. A first support shaft is rotatably mounted in the pair of second post by means of a pair of tapered roller bearings. A second support shaft is rotatably mounted in the housing also by means of a pair of tapered roller bearings. An intermediate member is respectively fixedly connected at its opposite ends to said first and second support shafts. A grinding wheel shaft is rotatably mounted in the housing and a grinding wheel is coaxially mounted on the grinding wheel shaft. The first post is connected to the grinding wheel shaft so as to permit its free rotation but also so as to determine its position relative to the support table.

Abstract: In a grinding or milling machine an improved clamping arrangement for holding one end of a tool blank having a portion with at least four sides in cross-section. The other end of the tool blank is held against a stationary holding member. The clamping arrangement includes a housing which is coaxially mounted on a drive shaft. A pair of clamping members are reciprocally mounted in the housing and are biased outwardly by means of a pair of coil springs. Each clamping member has a skewed planar surface at its free end. The skewed planar surfaces biasingly engage opposite edges of the tool blank so as to compensate for any misalignment of the tool blank with respect to the holding member and clamping arrangement.